CN101029985A

CN101029985A - Light source apparatus, display apparatus, terminal apparatus, and control method thereof

Info

Publication number: CN101029985A
Application number: CNA2007100854312A
Authority: CN
Inventors: 上原伸一; 今井雅雄
Original assignee: NEC Corp; NEC LCD Technologies Ltd
Priority date: 2006-03-03
Filing date: 2007-03-05
Publication date: 2007-09-05

Abstract

A light source apparatus has two or more light sources that have different light-emission spectra and that can be controlled independently, and also has light sensors for detecting the quantity of light emitted by the light sources. The light sensors are composed of one type of light sensor that is not provided with a color filter for selecting the wavelength of received light, and the light sensors are sensitive to wavelength ranges that are sufficiently broad to simultaneously receive light in red, green, and blue wavelength ranges. A control circuit controls the two or more light sources to emit light in a time sequential fashion, and compares reference data with the output values of the light sensors to control the quantity of light emitted by the light sources by means of a light source drive circuit. It is thereby possible to reduce the cost and size of a light source apparatus that is capable of correcting changes in hue.

Description

Light supply apparatus, display device, end device and control method thereof

Technical field

The present invention relates to a kind of light supply apparatus that can revise tonal variation, be provided with this light supply apparatus and can revise the display device of demonstration tonal variation, the method that is equipped with the end device of this display device and controls these devices.

Background technology

Because thin profile, light weight, small size, low-energy-consumption and other advantages, TV), and other large scale end devices broad development and used the display device of utilizing liquid crystal in the device of following ranges, described device comprise monitor, TV (TV:; Notebook personal computer, ATM (Automatic Teller Machine), vending machine and size terminal device in other; The personal information terminal), mobile phone, mobile game machine and other small-sized terminals devices with individual TV, PDA (Personal Digital Assistance:.Because liquid crystal molecule itself is not the autoluminescence molecule, they itself can be not luminous, so in order to feel demonstration, need the light source of some kinds.According to the light source that uses, liquid crystal indicator generally is divided into transmission-type, reflection-type or Transflective (being used in combination transmitted light and reflected light).Can reduce energy consumption in the reflection-type, this is because it utilizes exterior light in display device, needn't provide light source to display device, but compare with transmission-type, and contrast and otherwise display performance are relatively poor.Therefore, transmission-type and transflective liquid crystal display device are main flow at present.In transmission-type and transflective liquid crystal display device, on the rear surface of liquid crystal panel, be equipped with light supply apparatus, use light to produce demonstration by the light supply apparatus emission.Specifically, the light supply apparatus that separates with liquid crystal panel is a vitals in the liquid crystal indicator of present main flow.

Along with the development of nearest technology, the display performance of end device is improved, although only can show monochromatic feature before these devices, has become the color image information of energy display of high resolution recently.In the liquid crystal panel of energy display color, each pixel all is made of redness, green and blue subpixels, and the sub-pixel of these three colors has the color filter corresponding to each color.Form multicolor displaying by the combination of controlling these sub-pixel transmissivities.Specifically, at present the liquid crystal panel of main flow has the color filter as element, sets up color rendition zone on the chromatic diagram according to the dichroism of color filter with from the spectrum of the light of aforementioned light supply apparatus emission basically.Usually, the coupling of the dichroism of color filter and light source light spectrum is for enlarging the color rendition zone and showing that bright primary colours are vital.Specifically, the dichroism to each color in the color filter so designs, i.e. each transparent wavelength crossover not, and light source light spectrum so is provided with, and promptly the light of being launched all has peak value at red, green and blue wavelength region in each.

Especially fast-developing recently light emitting diode (LED) technology, so LED is not only as the light source in the display device of mobile communication terminal, but also as the light source in the display device of large-scale end device.Especially, be used as light source corresponding to three color redness, green and blue LED, the sharper emission photopeak value of preserving three primary colours thus in light source light spectrum can enlarge the color rendition zone and can obtain bright demonstration.Yet, to use therein in redness-green-blue led or other the multi-colored led situations as light source, the technology that obtains balance between color is vital.Because some are former thereby upset in the situation of this balance, and the tone of light source can change, therefore the tone that shows also can change therein.Given this, propose to obtain the technology of this colour balance, promptly be used to detect and control the method for colorful light-emitting element state.

Fig. 1 is the schematic diagram that is presented at first the conventional liquid crystal indicator that is equipped with the light source control device described in the JP-A2004-361618.As shown in fig. 1, first the conventional liquid crystal indicator 1001 that is equipped with the light source control device by liquid crystal panel 1002, be used to drive liquid crystal panel 1002 liquid crystal driver 1006, be used for to liquid crystal driver 1006 supply with signals display control circuit 1007, from observe side see be arranged on liquid crystal panel 1002 rear sides backlight 1003, be used to control backlight control circuit backlight 1005 and be arranged on the photodetector 1004 that liquid crystal panel 1002 is observed on the sides.

Liquid crystal panel 1002 has the liquid crystal display 1002a of the viewing area that is used for display message, is provided with a large amount of pixels in liquid crystal display 1002a.These pixels so are provided with, and promptly every group of three pixels comprise redness, green and blue pixel, to realize colored the demonstration.Obtain this three color pixel by the color filter that forms each color on substrate, color filter is the element of liquid crystal panel 1002.

In addition, outside the part of the liquid crystal display 1002a of liquid crystal panel 1002, place and be formed with not as the detection pixel 1002b that shows.This detection pixel 1002b forms by being used for redness, green and three blue detection pixels.In the mode identical, obtain the detection pixel of three colors by the color filter that on substrate, forms each color with the display pixel of display panel 1002.Specifically, when making liquid crystal panel 1002, under identical condition, form among the liquid crystal display 1002a and detect the pixel of pixel 1002b, so they have identical characteristic.Therefore, the state of detection pixel 1002b has reflected the pixel status of liquid crystal display 1002a.

Backlight 1003 light sources as liquid crystal panel 1002, this red light emitting diodes, green LED and blue LED that has as element backlight.White-light illuminating liquid crystal panel 1002 by the mixing of these three colors.In addition, these three light emitting diodes are connected with backlight control circuit 1005, and so construct, and promptly control the emissive porwer of three colors separately.Specifically, so construct backlight 1003, promptly mix light from redness, green and blue LED, and emission white light, because in using the liquid crystal panel 1002 of white light, revised change color, so backlight control circuit 1005 can be adjusted the emissive porwer of each color LEDs as light source.

Photodetector 1004 is made of three photodetectors corresponding to redness, green and blue detection pixel 1002b.The output of these photodetectors 1004 is imported into backlight control circuit 1005.

In first conventional liquid crystal indicator of the such structure that is equipped with the light source control device described in the JP-A2004-361618, photodetector 1004 detects the intensity of each color by redness, green and blue detection pixel 1002b.This pixel is formed on the liquid crystal panel 1002 and has the condition identical with the pixel of liquid crystal display 1002a.The result is imported into backlight control circuit 1005.Backlight control circuit 1005 is so operated, i.e. the result of difference input.Determining that colour balance is upset and do not obtained in the situation of desirable colourity, backlight control circuit is adjusted the light intensity of the light emitting diode of 103 respective color backlight, and keeps specific colourity.In an example, in red light intensity, detect in the situation that has departed from ideal value, adjust the emissive porwer of backlight 1003 red light emitting diodes, thereby keep desirable colourity.This detection is based on the signal from the red light detecting device 1004 that is provided with in the face of the detection pixel 1002b of red light.Green and blue light are applied identical operations.Control the state of the light emitting diode of each color thus, thereby even in the situation of a plurality of light emitting diodes that use emission different colours light, the tone of demonstration can not change yet.Because also consider the color filter characteristic of liquid crystal panel 1002 and the state of the light emitting diode that liquid crystal characteristic is controlled each color, even so in the situation that color filter changed along with the time, always also can stop these influences and stably keep colourity.

Fig. 2 is the schematic diagram in second the conventional display device that is equipped with the light source control device described in the SID 05 summary 1376-1379 page or leaf.As shown in Figure 2, be equipped with second conventional display device 2001 of light source control device by display panels 2002; See and be arranged on backlight 2003 on display panels 2002 rear sides from observing side; Be used to drive LED driving circuit module 2005 as the light emitting diode of element backlight; Be used to control the light emitting diode control module 2006 of LED driving circuit module 2005; Be used for optical sensor module 2007 to light emitting diode control module 2006 output light emitting diode states; Form with the redness, green, the blue light sensor 2004 that are connected with optical sensor module 2007 and be assembled on the display panels 2002.

Backlight 2003 light sources as display panels 2002.This red light emitting diodes, green LED and blue LED that has as element backlight, display panels 2002 is by the white-light illuminating of the mixing of these three colors.

Optical sensor 2004 is the photodiodes that formed by amorphous silicon layer, and described amorphous silicon layer is as the semiconductor layer of the thin film transistor (TFT) of forming display panels 2002 pixels.Optical sensor is formed on the part of the display panels 2002 that is positioned at outside the viewing area (for example upper area and lower area).Because optical sensor 2004 detects three color redness, green and blue separately, so the color filter that is equivalent to the pixel color color filter can be set to exposure one side of optical sensor 2004.

In second conventional display device of the such structure that is equipped with the light source control device described in the SID 05 summary 1376-1379 page or leaf, optical sensor 2004 detects red, green and blue light intensity; The result is input to optical sensor module 2007, to determine colour balance; Light emitting diode control module 2006 is controlled LED driving circuit module 2005 according to these results; Drive the light emitting diode of each color of composition backlight 2003.Cocoa suppresses the generation that desirable colourity situation is upset and do not obtained to colour balance wherein thus, especially can reduce because temperature and time changes the tonal variation that is caused.Therefore, can always stably keep tone.In this conventional example,, so the optical sensor of separation needn't be set, can reduce device size outside display panels, and can reduce cost because optical sensor forms the integral part of display panels.

Yet there is following problems in the above-mentioned conventional display device that is equipped with the light source control device.Specifically, in being equipped with first conventional display device of light source control device,, need minimum three photodetectors or optical sensor, therefore be difficult to reduce the size of detecting device and controller, also be difficult to reduce cost for red, green and blue.

In being equipped with second conventional display device of light source control device, optical sensor and display panels are whole to be formed.Therefore be easy to reduce size and reduce cost than being equipped with light source control device and photodetector separate setting with display panels first conventional display device.Yet, in second light source control device, need three optical sensors for red, green and blueness.Therefore in the display panels outer setting line of a large amount of and optical sensor module.Because these lines not only are difficult to reduce size, but also have reduced reliability, are difficult to reduce cost.In addition, because three optical sensors, are difficult to further reduce cost so need independent wavelength filter corresponding to red, green and blue.

Summary of the invention

An object of the present invention is to provide and a kind ofly can revise reducing cost and reducing the light supply apparatus of light supply apparatus size of tonal variation; Be equipped with this light supply apparatus and can revise the display device that shows tone; Be equipped with the end device of display device; And the method for controlling these devices.

Comprise having different emission spectrum also separately controllable two or more light sources, photodetector according to light supply apparatus of the present invention, be used to detect light quantity and controller by light emitted, be used for driving and the control light source by the result who uses photodetector, wherein said controller is controlled described two or more light source, thereby it is luminous in the time sequencing mode, and, export the light quantity of controlling light emitted based on the order that photodetector produces according to the light that time sequencing is launched.

In the present invention, even, also light source can be remained in the particular state, so the tone of the light that light supply apparatus can be launched remains in the particular state because temperature variation, time variation or other factors make the light source state variation.Because have the detecting device of less kind, so light supply apparatus is less, and less expensive.In addition, as the result that light source is launched all colours light in the time sequencing mode, what can reduce that the user feels is uncomfortable.This is because can independent regulation light source for each color, thereby the brightness of light supply apparatus in the calibration process can be reduced to the brightness in the occasion of launching all colours light simultaneously.

Also the preferred light detecting device only is made up of a kind of.Can use the detecting device of less kind and lesser amt thus, light supply apparatus can be littler, and price is less expensive.Reduce detector number and can reduce wiring quantity with control circuit.Therefore, distribution needs less space, can reduce size.

In addition, controller can be preserved the reference of data as the photodetector output valve, and the output valve of this reference data and photodetector is contrasted, thus the light quantity of control light source.Thus by exporting the state that can be easy to detection light source with this reference data contrast.

In addition, controller structure becomes stored number to be equal to or greater than several groups of reference datas of variety classes light source.Can carry out correction thus corresponding to more states.

In addition, can use a plurality of light sources of same type as described two or more light sources.In addition, controller is controlled described two or more light source, thereby the light source of identical type is simultaneously luminous in the time sequencing mode, and controller is exported the light quantity of controlling light emitted according to the light of time sequencing emission based on the order that photodetector produces.Can make thus because the fluctuation that temperature variation produces has identical trend with identical tone, can reduce to revise the required time thus.

For described two or more light sources, can adjust the light source of forming the same type light source separately.Control these light sources, thus luminous in the time sequencing mode, and, export the light quantity of controlling light emitted based on the order that photodetector produces according to the light that time sequencing is launched.Especially can accurately revise initial characteristic inhomogeneous of each light source and over time thus.

In addition, preferred light source and photodetector so are provided with, and promptly allow how possible combination, and wherein the distance between light source and the photodetector equates.But because the reference data of shared control unit storage, thus can reduce cost, and store less group reference data.

In addition, photodetector can be made up of single photodetector.Can reduce the quantity of photodetector thus, also can reduce the wiring quantity between photodetector and the control circuit.Therefore, distribution needs less space, can reduce size and reduces cost.

Photodetector also can be made up of a plurality of photodetectors, according to light source photodetector is set.Can accurately revise thus, even the characteristic in the light source is inhomogeneous.

In addition, be used to control in the time sequencing mode by preferably 16 milliseconds of time periods of the light of described two or more light emitted.What can reduce greatly thus that calibration that the user feels causes is uncomfortable, because the user no longer recognizes the light with the time sequencing emission.

In addition, compare with normal demonstration occasion, the preferred light quantity of wherein controlling in the time course of described two or more light source luminescents in the time sequencing mode is less.Can further reduce the brightness of display screen in calibration process thus, can further reduce owing to light source with the luminous user who causes of time sequencing mode feel uncomfortable.

Control light quantity in the time course of described two or more light source luminescents in the time sequencing mode therein and also can equal normally to show light quantity in the occasion process.Can reduce the The noise that detecting device produces thus, can revise more accurately.

In addition, when light supply apparatus when ready mode becomes mode of operation, the light quantity of may command light emitted.Thus can be before lighting light supply apparatus regulation light source, this can make light supply apparatus use with proper state in use.

In addition, the operation that is used to control the light quantity of light emitted can be carried out repeatedly.A plurality of calibrations can realize more accurate control, precision correction colourity that therefore can be higher.

In addition, the preferred light source device comprises Temperature Detector, and it exports testing result to controller, and the testing result of controller serviceability temperature detecting device is controlled the light quantity of light emitted.Light-emitting component can be remained in the particular state thus, even temperature changes suddenly when using device, also the tone of the light that light supply apparatus can be launched remains in the particular state.

Controller is also preserved the reference of data as the Temperature Detector output valve, and with the contrast of the output valve of this reference data and Temperature Detector, thereby determines whether to begin to be used to control the operation of the light quantity of light emitted.But the reference data of control circuit storage temperature detecting device is easy to thus from detect state of temperature with the contrast of reference data.

In addition, Temperature Detector is preferably near the light source setting.Be easy to detect the fluctuation in the light source that causes by temperature variation thus.

In addition, can suitably use light emitting diode as light source.Can do light supply apparatus littler thus and thinner.

In addition, light emitting diode is made up of red, green and blue light-emitting component.This can obtain to have the bright demonstration of broad chromaticity range for transmissive type liquid crystal panel.

In light supply apparatus of the present invention, photodetector has following light-receiving wavelength coverage, and promptly it is corresponding to two or more at least emission wavelength scopes of described light source.Photodetector can be corresponding to two or more light sources thus, and can use the photodetector that lacks than light source thus with using with the luminous detection method of time sequencing mode based on the control light source, have reduced cost and have reduced size.

Use by light source with the light of time sequencing emission detect with the time period of controlling by the light quantity of light emitted be to separate as the time period of lighting means with the light that wherein uses light emitted.Can will also can be used for wherein light source with the non-constant luminous display device of time sequencing mode with the luminous detection method of time sequencing mode based on the control light source.

In addition, the luminous time period is included in time period of the light quantity that is used for detecting and control light emitted to described two or more light source simultaneously.Reduce the light quantity of light emitted thus in the time period of the light quantity that is used for detecting and control light emitted, can stop the user to feel uncomfortable thus.

In addition, form a constant time cycle by time period of the light quantity that is used to detect and control light emitted with by the light that wherein uses light emitted as time period of lighting means.The user feels that unlikely device was in the time period of detection and control light source state thus, and can periodically detect and control the state of light source, can allow bigger precision.

In addition, in time period of the light quantity that is used to detect and control light emitted and wherein use the light of light emitted to comprise the time period that is used to reduce the light source light quantity between the time period as lighting means.

In addition, be provided for detecting the parts of exterior light, use the testing result that obtains by described parts to control the light quantity of light emitted.Can carry out control thus, and so adjust, promptly in bright light environments, improve screen intensity, thereby obtain clearly to show, in dark situation, reduce screen intensity, thereby the user not be subjected to the influence of dazzle corresponding to surrounding environment.In addition, can reflect the tone of exterior light, display screen presents yellow tone in bright yellow environment, can solve thus that the observer sees the problem of display screen as blue and white after having used yellow environment.

Comprise aforesaid light supply apparatus and transluscent display panel according to display device of the present invention, this transluscent display panel is used for the light of transmission from described light supply apparatus emission, thus image is added on the light.

Preferably when controlling the light quantity of light supply apparatus emission, reduce the transmissivity of transluscent display panel.

Because the user no longer feels light when the some bright light source and when launching color in the time sequencing mode in calibration process, thus can reduce greatly that the user feels in the calibration process uncomfortable.In addition, because the transmissivity of display panel is lower in the calibration process, so can reduce the influence of exterior light greatly.Especially, can eliminate from observer's side pass display panel the viewing area, enter optical plate and the influence of the light propagated by optical plate.

In addition, by showing that on transluscent display panel black can reduce transmissivity.

In addition, transluscent display panel is preferably the normal black pattern that has low transmissivity when deenergization.Can eliminate the influence of exterior light thus, even and when the transmission-type liquid crystal display panel is in ready mode, also can revise operation to light source.

In addition, when light supply apparatus and transluscent display panel when ready mode enters mode of operation, after finishing the operation of control by the light quantity of light emitted, transluscent display panel becomes mode of operation.Adjustable light source before display device is used thus, therefore display device can be worked in suitable state when putting bright light source.

In addition, photodetector is formed by amorphous si-layer, and described amorphous si-layer is as the semiconductor layer in the thin film transistor (TFT) of forming the transmission-type liquid crystal display panel pixel.Extra light source thus can not need be set outside display panel, can reduce size, reduce cost simultaneously.

In addition, photodetector preferably is arranged in the non-display area of transluscent display panel.The influence of exterior light can be reduced thus, accuracy of detection can be improved photodetector.

In addition, transluscent display panel is a liquid crystal panel, can suitably use the liquid crystal panel of lateral electric field mode or homotype alignment mode.

In addition, liquid crystal panel is the liquid crystal panel of a continuous mode.

In addition, the polaroid that uses in the liquid crystal panel preferably is arranged to cover photodetector.Can reduce the influence of exterior light thus, and improve accuracy of detection optical sensor.

Display device of the present invention, comprise aforesaid light source and transluscent display panel, this transluscent display panel is used for the light of transmission from described light supply apparatus emission, thus image is added on the light, wherein relevant with the refresh rate of transluscent display panel with time period of the light quantity of controlling light emitted with the time cycle that forms as time period of lighting means by the light that wherein uses light emitted by being used to detect.Can improve the video image display performance of display device thus.In addition, because can in the short time cycle, be recycled and reused for the operation that detects and revise the light source state, so not only can make the user can not feel the operation that is used to detect and revise the light source state, but also can obtain the demonstration of better quality, because can control at a high speed.

In addition, in this display device, display panel is the display panel of a continuous mode.

Comprise aforesaid display device according to end device of the present invention.

End device for example is portable phone, personal information terminal, game console, digital camera, video camera, video player, notebook personal computer, ATM (Automatic Teller Machine) or vending machine.

In addition, when becoming mode of operation, ready mode is used to detect and revise the operation of light source state when end device.Thus can be before end device uses regulation light source, therefore end device can be worked in suitable state when putting bright light source.

In addition, when changing, the displaying contents of end device can be used to detect and revise the operation of the light quantity of light emitted.Can revise the heat that produces by light source thus and the characteristics fluctuation that causes, and can in calibration process, stop the user to feel uncomfortable.

In addition, end device has foldable structure, when device when closed condition is opened, be used to detect and revise the operation of the light quantity of light emitted.Thus can be before end device uses regulation light source, therefore end device can be worked in suitable state when putting bright light source.

In addition, preferred device has following structure, and promptly wherein the part of terminal framework is arranged on the photodetector, and this part frame can stop exterior light.Can further reduce the influence of exterior light thus, can further improve accuracy of detection photodetector.

According to the control method that is used for light supply apparatus of the present invention, described light supply apparatus comprises having different emission spectrum also separately controllable two or more light sources, photodetector, be used to detect light quantity and controller by light emitted, be used for driving and the control light source by the result who uses photodetector, wherein said controller is controlled described two or more light source, thereby it is luminous in the time sequencing mode, and, export the light quantity of controlling light emitted based on the order that photodetector produces according to the light that time sequencing is launched.

According to the control method that is used for light supply apparatus of the present invention, described light supply apparatus comprises having different emission spectrum and separately controllable two or more light sources, photodetector, be used to detect light quantity by light emitted, the Temperature Detector that is used for detected temperatures, and controller, be used for driving and the control light source by the result who uses photodetector and Temperature Detector, wherein said controller is controlled described two or more light source, thereby it is luminous in the time sequencing mode, and, export the light quantity of controlling light emitted based on the order that photodetector produces according to the light that time sequencing is launched.

According to the method for controlling display device that is used for of the present invention, this display device comprises having different emission spectrum also separately controllable two or more light sources, photodetector, be used to detect light quantity, controller by light emitted, be used for driving and control light source and transluscent display panel by the result who uses photodetector, be used for the light of transmission from described two or more light emitted, thus image is added on the light, wherein said controller is controlled described two or more light source, thereby luminous in the time sequencing mode; And, export the light quantity of controlling light emitted based on the order that photodetector produces according to the light that time sequencing is launched; And wherein in the radiative process of time sequencing mode, reduce the transmissivity of transluscent display panel.

According to the method for controlling display device that is used for of the present invention, this display device comprises having different emission spectrum and separately controllable two or more light sources, photodetector, be used to detect light quantity by light emitted, controller, be used for driving and the control light source by the result who uses photodetector, and transluscent display panel, be used for the light of transmission from described two or more light emitted, thus image is added on the light, wherein said controller is controlled described two or more light source, thereby it is luminous in the time sequencing mode, light according to the time sequencing emission, export based on the order that photodetector produces, be used to control the time period of the light quantity of light emitted, use the light of light emitted to separate with being used to as the time period of lighting means, and this have formed a constant time cycle two time periods, and relevant with the refresh rate of transluscent display panel.

According to the control method that is used for end device of the present invention, this end device comprises having different emission spectrum and separately controllable two or more light sources, photodetector, be used to detect light quantity by light emitted, controller, be used for driving and the control light source by the result who uses photodetector, and transluscent display panel, be used for the light of transmission from described two or more light emitted, thus image is added on the light, wherein said controller is controlled described two or more light source, thereby it is luminous in the time sequencing mode, and when end device when ready mode becomes mode of operation, according to the light of time sequencing emission, export the light quantity of controlling light emitted based on the order that photodetector produces.

According to the control method that is used for end device of the present invention, this end device comprises having different emission spectrum and separately controllable two or more light sources, photodetector, be used to detect light quantity by light emitted, controller, be used for driving and the control light source by the result who uses photodetector, and transluscent display panel, be used for the light of transmission from described two or more light emitted, thus image is added on the light, wherein said controller is controlled described two or more light source, thereby it is luminous in the time sequencing mode, and when the displaying contents of end device changes, according to the light of time sequencing emission, export the light quantity of controlling light emitted based on the order that photodetector produces.

According to the control method that is used for end device of the present invention, this end device has the shape of folding device, and comprise having different emission spectrum and separately controllable two or more light sources, photodetector, be used to detect light quantity by light emitted, controller, be used for driving and the control light source by the result who uses photodetector, and transluscent display panel, be used for the light of transmission from described two or more light emitted, thus image is added on the light, wherein said controller is controlled described two or more light source, thereby it is luminous in the time sequencing mode, and when end device after folding closing and when opening, according to the light of time sequencing emission, export the light quantity of controlling light emitted based on the order that photodetector produces.

According to the control method that is used for end device of the present invention, this end device comprises having different emission spectrum and separately controllable two or more light sources, photodetector, be used to detect light quantity by light emitted, controller, be used for driving and the control light source by the result who uses photodetector, and transluscent display panel, be used for the light of transmission from described two or more light emitted, thus image is added on the light, the light that wherein uses light emitted is controlled described two or more source emissioning light as time period of lighting means and its middle controller in the time sequencing mode and is separated according to the time period that the order that the light of time sequencing emission produces based on photodetector is exported the light quantity of controlling light emitted; Begin to be used to detect and control the time period of the light quantity of light emitted by the external signal that is input to controller; When the demonstration of end device changes, send instruction to controller, and be used to detect and control the time period of the light quantity of light emitted according to this instruction generation according to external signal.

According to the present invention, the light supply apparatus that can enable to revise tonal variation is littler, and price is less expensive.

Description of drawings

Fig. 1 is presented at the disclosed schematic diagram that is equipped with first conventional liquid crystal indicator of light source control device in the patent documentation 1;

Fig. 2 is presented at the disclosed schematic diagram that is equipped with second conventional liquid crystal indicator of light source control device in the non-patent literature 1;

Fig. 3 is the skeleton view that shows according to the display device of first embodiment of the invention;

Fig. 4 is the skeleton view that shows according to the end device of present embodiment;

Fig. 5 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 5G, wherein the transverse axis of each figure is the time, Fig. 5 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Fig. 5 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Fig. 5 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Fig. 5 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Fig. 5 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Fig. 5 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Fig. 5 G has the output result's of the optical sensor that draws value on Z-axis;

Fig. 6 is the skeleton view according to the display device of second embodiment of the invention;

Fig. 7 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 7H, wherein the transverse axis of each figure is the time, Fig. 7 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Fig. 7 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Fig. 7 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Fig. 7 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Fig. 7 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Fig. 7 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Fig. 7 G has the output result's of the optical sensor that draws value on Z-axis, Fig. 7 H has the transmissivity of the transmission-type liquid crystal display panel that draws on Z-axis;

Fig. 8 is the skeleton view that shows according to the display device of third embodiment of the invention;

Fig. 9 is the skeleton view that shows according to the display device of four embodiment of the invention;

Figure 10 is the skeleton view that shows according to the display device of fifth embodiment of the invention;

Figure 11 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 11M, wherein the transverse axis of each figure is the time, Figure 11 A has the light emissive porwer of the red element of the RGB-LED51a that draws on Z-axis, Figure 11 B has the light emissive porwer of the green components of the RGB-LED51a that draws on Z-axis, Figure 11 C has the light emissive porwer of the blue element of the RGB-LED51a that draws on Z-axis, Figure 11 D has the light emissive porwer of the red element of the RGB-LED51b that draws on Z-axis, Figure 11 E has the light emissive porwer of the green components of the RGB-LED51b that draws on Z-axis, Figure 11 F has the light emissive porwer of the blue element of the RGB-LED51b that draws on Z-axis, Figure 11 G has the light emissive porwer of the red element of the RGB-LED51c that draws on Z-axis, Figure 11 H has the light emissive porwer of the green components of the RGB-LED51c that draws on Z-axis, Figure 11 I has the light emissive porwer of the blue element of the RGB-LED51c that draws on Z-axis, Figure 11 J has the light emissive porwer of the red element of the RGB-LED51d that draws on Z-axis, Figure 11 K has the light emissive porwer of the green components of the RGB-LED51d that draws on Z-axis, Figure 11 L has the light emissive porwer of the blue element of the RGB-LED51d that draws on Z-axis, Figure 11 M has the optical sensor output result's who draws value on Z-axis;

Figure 12 is the skeleton view that shows according to the display device of sixth embodiment of the invention;

Figure 13 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 13H, wherein the transverse axis of each figure is the time, Figure 13 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 13 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 13 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 13 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 13 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 13 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 13 G has the optical sensor output result's who draws value on Z-axis, Figure 13 H has the output of the temperature sensor 6 that draws on Z-axis;

Figure 14 is the skeleton view that shows according to the display device of seventh embodiment of the invention;

Figure 15 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 15G, wherein the transverse axis of each figure is the time, Figure 15 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 15 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 15 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 15 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 15 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 15 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 15 G has the optical sensor output result's who draws value on Z-axis;

Figure 16 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 16G, wherein the transverse axis of each figure is the time, Figure 16 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 16 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 16 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 16 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 16 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 16 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 16 G has the optical sensor output result's who draws value on Z-axis;

Figure 17 is the skeleton view that shows according to the display device of ninth embodiment of the invention;

Figure 18 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 18H, wherein the transverse axis of each figure is the time, Figure 18 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 18 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 18 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 18 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 18 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 18 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 18 G has the red light sensor output result's who draws value on Z-axis, Figure 18 H has the white light sensor output result's who draws value on Z-axis;

Figure 19 is the skeleton view that shows according to the display device of tenth embodiment of the invention;

Figure 20 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 20E, wherein the transverse axis of each figure is the time, Figure 20 A have on Z-axis, draw send to the electric current of white BY-LED by light source driving circuit, Figure 20 B have on Z-axis, draw send to the electric current of blue BY-LED by light source driving circuit, Figure 20 C has the light emissive porwer of the white BY-LED that draws on Z-axis, Figure 20 D has the light emissive porwer of the blue BY-LED that draws on Z-axis, Figure 20 E has the optical sensor output result's who draws value on Z-axis;

Figure 21 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 21G, wherein the transverse axis of each figure is the time, Figure 21 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 21 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 21 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 21 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 21 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 21 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 21 G has the optical sensor output result's who draws value on Z-axis;

Figure 22 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 22G, wherein the transverse axis of each figure is the time, Figure 22 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 22 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 22 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 22 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 22 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 22 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 22 G has the optical sensor output result's who draws value on Z-axis;

Figure 23 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 23G, wherein the transverse axis of each figure is the time, Figure 23 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 23 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 23 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 23 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 23 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 23 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 23 G has the optical sensor output result's who draws value on Z-axis;

Figure 24 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 24G, wherein the transverse axis of each figure is the time, Figure 24 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 24 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 24 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 24 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 24 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 24 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 24 G has the optical sensor output result's who draws value on Z-axis;

Figure 25 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 25G, wherein the transverse axis of each figure is the time, Figure 25 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 25 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 25 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 25 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 25 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 25 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 25 G has the optical sensor output result's who draws value on Z-axis;

Figure 26 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 26G, wherein the transverse axis of each figure is the time, Figure 26 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 26 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 26 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 26 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 26 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 26 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 26 G has the optical sensor output result's who draws value on Z-axis;

Figure 27 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 27G, wherein the transverse axis of each figure is the time, Figure 27 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 27 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 27 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 27 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 27 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 27 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 27 G has the optical sensor output result's who draws value on Z-axis;

Figure 28 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 28G, wherein the transverse axis of each figure is the time, Figure 28 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 28 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 28 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 28 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 28 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 28 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 28 G has the optical sensor output result's who draws value on Z-axis;

Figure 29 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 29G, wherein the transverse axis of each figure is the time, Figure 29 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 29 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 29 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 29 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 29 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 29 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 29 G has the optical sensor output result's who draws value on Z-axis;

Figure 30 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 30G, wherein the transverse axis of each figure is the time, Figure 30 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 30 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 30 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 30 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 30 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 30 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 30 G has the optical sensor output result's who draws value on Z-axis;

Figure 31 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 31H, wherein the transverse axis of each figure is the time, Figure 31 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 31 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 31 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 31 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 31 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 31 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 31 G has the optical sensor output result's who draws value on Z-axis, Figure 31 H has the transmissivity of the transmission-type liquid crystal display panel that draws on Z-axis;

Figure 32 is the skeleton view that shows according to the display device of 22nd embodiment of the invention;

Figure 33 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 33H, wherein the transverse axis of each figure is the time, Figure 33 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 33 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 33 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 33 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 33 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 33 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 33 G has the light source light sensor output result's who draws value on Z-axis, Figure 33 H has the external light sensor output result's who draws value on Z-axis;

Figure 34 is the skeleton view that shows according to the display device of 23th embodiment of the invention;

Figure 35 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 35G, wherein the transverse axis of each figure is the time, Figure 35 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 35 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 35 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 35 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 35 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 35 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 35 G has the optical sensor output result's who draws value on Z-axis;

Figure 36 is the skeleton view that shows according to the display device of 24th embodiment of the invention;

Figure 37 is the cross-sectional view that shows in the present embodiment as the transparent/scattering switching device of display device element;

Figure 38 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 38H, wherein the transverse axis of each figure is the time, Figure 38 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 38 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 38 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 38 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 38 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 38 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 38 G has the fuzzy value of the transparent/scattering switching device that draws on Z-axis, Figure 38 H has the optical sensor output result's who draws value on Z-axis;

Figure 39 is the skeleton view that shows according to the display device of 25th embodiment of the invention;

Figure 40 is the top view that shows in the present embodiment as light source, optical sensor and the diffusion sheet position of display device element; With

Figure 41 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 41C, wherein the transverse axis of each figure is the time, Figure 41 A has the value of exporting the result at the optical sensor in first row/the first row that draws on the Z-axis, Figure 41 B has the value of exporting the result at the optical sensor in secondary series/second row that draws on the Z-axis, and Figure 41 C has the value in the output of optical sensor in the 3rd row/the third line result who draws on the Z-axis.

Embodiment

Describe the method for light supply apparatus, display device, end device and these devices of control with reference to the accompanying drawings in detail according to the embodiment of the invention.To the method for light supply apparatus, display device, end device and these devices of control according to first embodiment of the invention be described at first.Fig. 3 is the skeleton view that shows according to the display device of present embodiment, and Fig. 4 is the skeleton view that shows according to the end device of present embodiment.

As shown in Figure 3, form by light supply apparatus 1 and transmission-type liquid crystal display panel 7 according to the display device 2 of first embodiment.Light supply apparatus 1 is provided with the optical plate of being made up of transparent material 3.Optical plate 3 is rectangular sheet shapes.The position of facing a side surface (light incident surface 3a) of optical plate 3 is provided with light source 51.Light source 51 is RGB (RGB) LED (light emitting diode) 51, and wherein red, green is arranged in the identical hermetically-sealed construction with blue light emitting device.Light incident surface 3a along optical plate 3 is arranged with a plurality of RGB-LED51, and an example of LED quantity is four.For optical plate 3, from the light of light incident surface 3a incident equably from first type surface (light exit surface 3b) outgoing.Optical plate is exported from the light of the LED outgoing of pointolite in the mode on plane.In addition, be provided for the light source driving circuit 202 of driving light source, RGB-LED51 links to each other with this circuit.

Side relative with light incident surface 3a at optical plate 3 is provided with the optical sensor 4 that is used for the detection light source luminous intensity.Optical sensor 4 for example is a photodiode, in the present embodiment optical plate 3 with light incident surface 3a facing surfaces on only be provided with a photodiode.Be unlike in the optical sensor described in the conventional example, optical sensor 4 is not provided for the color filter of selective reception light wavelength.Specifically, optical sensor 4 is made up of a kind of optical sensor, and enough responsive for the broad wavelength coverage of the light that wherein receives redness, green and blue wavelength simultaneously.Optical sensor 4 be used to detect by optical plate 3 that propagate continuously rather than on normal direction from the light intensity of light exit surface 3b outgoing.

In addition, be provided for controlling the control circuit 201 of light source driving circuit 202, optical sensor 4 is connected with this control circuit 201.Specifically, will be input to control circuit 201 from the testing result of optical sensor 4.

Control circuit 201 is the circuit that are used to control light source driving circuit 202 as previously described, and its inside has the storage data as the reference of optical sensor 4 input signals.This reference data is made up of the individual data that is used for a plurality of independent controllable color of light source.Specifically, in the situation of RGB-LED51, control circuit 201 storage when red, blueness and green luminousing element with ideal tensile strength independent when luminous by the data of optical sensor 4 detections as the reference data.With respect to the result who is detected by optical sensor 4, control circuit 201 is checked this reference data.In the situation of testing result greater than reference data, control circuit control light source driving circuit 202, to reduce the light emissive porwer, in the situation of testing result less than reference data, control circuit control light source driving circuit 202 is to increase the light emissive porwer.Equal in the situation of reference data in testing result, control circuit control light source driving circuit 202 is to keep identical light emissive porwer.Be used to select whether luminous for control circuit 201 inputs or extinguish the signal of light supply apparatus 1.Specifically, extinguish in the situation of light supply apparatus 1 at the end device that is equipped with light supply apparatus 1, signaling bearer extinguishes the instruction of light supply apparatus, and control circuit 201 may command light source driving circuits 202 extinguish RGB-LED51 thus.Control circuit 201 receives instruction from end device, also lights RGB-LED51 in an identical manner with control light source driving circuit 202.

Aforesaid transmission-type liquid crystal display panel 7 is added on the light light image in the face of the light exit surface 3b of optical plate 3 is provided with by making from the light transmission of light exit surface 3b outgoing.

Display device 2 for example is installed in the display part of portable phone 9, as shown in Figure 4.Specifically, comprise above-mentioned display device according to present embodiment as the portable phone 9 of portable terminal device.

The operation of the display device relevant with the preferred embodiment of above-mentioned structure is described below; Promptly control method according to the present embodiment light supply apparatus.Fig. 5 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 5G, wherein the transverse axis of each figure is the time, Fig. 5 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Fig. 5 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Fig. 5 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Fig. 5 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Fig. 5 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Fig. 5 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Fig. 5 G has the output result's of the optical sensor that draws value on Z-axis.

Before the time t1 in Fig. 5, light supply apparatus disconnects, and RGB-LED extinguishes.Specifically, the electric current that flows in redness, green and the blue light emitting device of RGB-LED is 0, and to as shown in the 5C, the luminous intensity of the redness of RGB-LED, green and blue light emitting device also remains 0 as Fig. 5 A, as Fig. 5 D to as shown in the 5F.As a result, the output result of optical sensor is 0 substantially also, as shown in Fig. 5 G.

On the contrary, time t1 is the time that light supply apparatus is connected.For example, in the situation of the power connection of the portable phone that is equipped with light supply apparatus, be jack knife phone perhaps with inwardly folding display surface and operating surface at portable phone, in the situation as shown in Figure 4, light supply apparatus is connected, wherein when phone folded is closed, light supply apparatus disconnects, because the user no longer watches display surface, when phone was in use connected, light supply apparatus was connected then.

When light supply apparatus for example at time t1, promptly receive when going code and when connection when control circuit 201, control circuit 201 is not connected redness, green and the blue light emitting device of RGB-LED51 simultaneously, but at first only supplies with particular current to red light-emitting component, as Fig. 5 A to as shown in the 5C.Time period, the example of this time period was 16ms from t1 to t2.The value of this specific currents sets in advance in control circuit 201.Supply with specific currents to red light-emitting component red light-emitting component lighted, as Fig. 5 D to as shown in the 5F.Optical sensor 4 receives the light from red light-emitting component at this moment, and the result is outputed to control circuit 201.Solid line among Fig. 5 G is represented the output result of optical sensor 4.In addition, dotted line represents to preexist in the reference data of the optical sensor 4 in the control circuit 201; Promptly in the situation that red light-emitting component is lighted with ideal tensile strength in time period t 1-t2 process by the data of optical sensor 4 output.Exist between solid line and dotted line in the situation of difference, control circuit 201 concludes that the luminance of red light-emitting component of RGB-LED51 is different with reference state.Specifically, control circuit 201 is compared reference data with the result who is detected by optical sensor 4, in the situation of testing result greater than reference data, control circuit control light source driving circuit 202, to reduce the light emissive porwer, and in the situation of testing result less than reference data, control circuit control light source driving circuit 202 is to increase the light emissive porwer.In addition, equal in the situation of reference data in testing result, control circuit control light source driving circuit 202 is to keep identical light emissive porwer.Luminance with red light-emitting component is calibrated to reference state thus.

Next, when finishing the calibration of red light-emitting component at time t2 place, the electric current that control circuit 201 will flow to red light-emitting component is made as 0, and supplies with particular current to green luminousing element.Only light green luminousing element thus, calibrate green luminousing element in the mode identical with red light-emitting component.Time period is from t2 to t3.When finishing the calibration of green luminousing element, calibrate blue light emitting device in an identical manner to the t4 place at time t3.Specifically, supply with particular current, only light blue light emitting device thus, extinguish redness and green luminousing element to blue light emitting device.

When at time t1 when the t4 place finishes the calibration of RGB-LED51, light redness, green and the blue light emitting device of RGB-LED51 simultaneously at time t4 place.This moment, the drive condition of light-emitting component used in the calibration result of time t1 to the t4 place, as Fig. 5 A to as shown in the 5F.Light-emitting component remains in the particular state thus, is remained in the particular state by the tone of the light of light supply apparatus emission.

Next, will the effect of present embodiment be described.According to the light supply apparatus of present embodiment, when light supply apparatus is connected, light redness, green and the blue light emitting device of RGB-LED in continuous mode of time, by single optical sensor come receiving element the light emission, come the state of regulation light source.Even when changing owing to temperature variation, time and other factors when causing the state variation of light-emitting component of these colors, also can keep specific state thus, therefore the tone by the light of light supply apparatus emission can be remained in the specific state.In addition, only need to be provided with single optical sensor in the present embodiment, compare with the situation that wherein is provided with corresponding to three optical sensors of red, blueness and green wavelength scope, picture is compared with the conventional example of describing in conjunction with the present invention, can reduce the kind and the quantity of optical sensor, can do light supply apparatus less, and can reduce cost.The quantity that reduces optical sensor can reduce the line between optical sensor and the control circuit, so distribution needs less space, can reduce size.In addition, control circuit has the reference data of optical sensor output, can compare with reference data thus, and be easy to the state of detection light source.In addition, compare, come regulation light source can reduce the brightness of light supply apparatus in the calibration process to each color respectively with the scheme of wherein launching the light supply apparatus of all colours light simultaneously.Therefore, when with the color of continuous mode transmitting illuminant of time, can reduce by the observer feel uncomfortable.

As previously described, the optical sensor in the present embodiment be arranged on optical plate with the light incident surface facing surfaces on.Optical plate generally forms bigger than the viewing area of display panel, and is designed to the viewing area of throwing light on equably.Therefore, the comparable viewing area of optical sensor that is arranged on the end surfaces of optical plate is arranged on the outside more far away, promptly is arranged on the rear side of display panel frame part.The frame part of display panel is provided with the light-blocking part of color filter.Therefore, the influence of exterior light can be reduced, accuracy of detection can be improved thus optical sensor.The polaroid that uses in the display panel is arranged on the optical sensor.Can further reduce the influence of exterior light by the absorption of polaroid.The outer frame part of portable phone also is arranged on the optical sensor, and this part housing can be used for stopping exterior light.

In the present embodiment, when light supply apparatus is connected, only carry out primary calibration to the t4 place, and the present invention is not limited in this selection, also can repeatedly calibrate at time t1.This calibration can be controlled more accurately, therefore can be with higher precision correction tone.The alignment time of the light-emitting component of each color is 16ms in addition, but also can be set other time period.Consider the flicker of light supply apparatus in redness, green and blueness, and after connecting, become in the required time period process that can be used for showing and correctly to show at light supply apparatus, the alignment time section should be shorter, be preferably 1 frame or littler (16ms or littler), can reduce relevant with calibration uncomfortable greatly.

In addition, in the present embodiment,, open the calibration of the light-emitting component of forming RGB-LED, but pass allowing the time period between the time of connecting light supply apparatus and the time that begins to calibrate light-emitting component to connect light supply apparatus at time t1 place simultaneously.When extinguishing light source in this time period process, can detect the output of optical sensor, testing result is as the skew of revising.Can remove the influence of exterior light thus from calibration, in calibration process, can obtain to detect more accurately in the situation of inhibition exterior light.

In the present embodiment, be identical level at time t1 roughly to the luminous intensity in the calibration process of t4 place light source, but the present invention is not limited in this selection with the luminous intensity that makes progress from time t4.Especially, the luminous intensity that can make progress less than time t4 in the luminous intensity of time t1 in the calibration process of t4 place light source, can further reduce the brightness of shown image in the calibration process thus, can reduce by uncomfortable with the observer that color was caused of time continuation mode transmitting illuminant.

In addition, the reference data of optical sensor sets in advance in the control circuit that comprises the minimum number color, but the present invention is not limited in this selection, and reference data can comprise the data of larger amt.Example comprises that wherein portable phone is configured to allow the user to change the situation of screen intensity setting and wherein stores the reference data of each brightness setting and use the situation of optimal reference data according to brightness is set.This structure also allows the user to change the tone setting, for this purpose, can store many group reference datas.Can carry out correction thus corresponding to the wide variety condition.

In addition, control circuit has been described wherein with the example of reference data and light sensors result contrast, so control light source driving circuit, promptly in the situation of testing result, reduce the light emissive porwer of light source, but can produce remaining for the numerical difference between between testing result and the reference data greater than reference data.Specifically, so control light source driving circuit, promptly in the situation of testing result, reduce the luminous intensity of light source, and so control light source driving circuit, promptly keep identical luminous intensity in the situation in testing result drops on particular range than the big steady state value of reference data.

In the present embodiment, described and wherein used the reference data that sets in advance the optical sensor in control circuit to calibrate, but the present invention is not limited in this selection.For example, also can produce the data that are equivalent to reference data by calculating testing result.

The situation of variation is set for screen intensity wherein, the many groups reference data that replaces the different brightness of storage to be provided with, can preserve in addition corresponding to brightness be provided with particular factor, and multiply by the reference data that basic brightness is provided with this coefficient, perhaps carry out other calculating, produce many group reference datas thus.Can reduce group number thus by the reference data of control circuit storage, the structure of simplified control circuit, and reduce cost.Can also following manner calculate, be about to typical data the variation of time is stored as a coefficient, the time of lighting can be thought and reflected this coefficient.For example red LED is easier to worsen than other elements, following situation occurred, and promptly wherein only red LED is no longer consistent with reference data in than long hair photoperiod process.Obtain constant balance by described coefficient so is set this moment, and promptly light quantity is along with fluorescent lifetime reduces.

In addition, insufficient and reference data and calibration do not produce in any improved situation by the result of light sensors therein, may be defective to the light source of particular color, and it worsens fast.In this case, although overall brightness has descended, can calibrate according to the light source that output has descended, to guarantee tone balance.

The time in the light source light emissive porwer of also being directed to changes sets up reference data.Specifically, connect the back along with time lapse at light source, light source is tending towards launching the light of different amounts.Especially, when having spent the regular hour after light source is connected, light quantity begins to stablize after rising through being everlasting.Given this, so set up reference data in advance, promptly in the situation that light quantity is stable therein, the light-emitting component of each color is launched light with specific balance.As a result, connect when calibrating simultaneously, consider that certain period of time sets up reference data, therefore upset the balance between the light-emitting component of each color when light source.Yet,, obtain the particular balance between the color once more along with time lapse and light quantity are stablized.

As mentioned above, an importance of the present invention is that the particular event in the processes such as operative installations unlatching is as the triggering source of regulation light source.Of the present inventionly mainly be, multiple light source with different optical emission spectroscopies is launched light by continuous mode of time, use has the light detecting device of the optical receiver spectrum wideer than optical emission spectroscopy, thus, controls light source under the situation of the quantity that reduces different types of optical receiver.Specifically, not necessary aspect of the present invention by using particular event to calibrate as the triggering source.Yet, because use this triggering source can reduce the possibility that the user recognizes calibration operation, so calibration operation of the present invention is more conducive to be applied to this device.

Except connecting as previously described the light supply apparatus, be to connect display device or the end device that is equipped with this light supply apparatus as another example of the suitable incident in the triggering source that is used to calibrate.Other example comprises and is converted to wherein that display screen has the power dissipation modes of low-light level, perhaps returns from power dissipation modes.In addition, suitably revise therein in the situation of time fluctuation in the light source, can be provided for light supply apparatus service time integration device, and calibrate after the special time in passage.This structure also allows the wish regulation light source of user according to them.As an example, calibration knob can be set.Owing to can revise according to their wish, so the user is very convenient.

As previously described, the reference data of the variation during preferred control circuit is preserved and is provided with corresponding to screen intensity, but the also preferred brightness that changes screen as the user is carried out calibration operation in use triggering source when being provided with.Can more accurately react the correction of using reference data thus.In addition, it not only is suitable for the screen intensity setting, but also is suitable for the tone setting, and can utilize user's the variation that is provided with to calibrate as the triggering source.End device uses in the world, and identical end device often uses at country variant more and more, but because there are some different preferences, so require simple method to adapt to these preferences.For structure of the present invention, not only be easy to be provided with and change the tone of screen, revise operation but also can simplify, this is extremely preferred.

The variation that suits in the mobile communication terminal comprises and changes to vibration mode; The i.e. alarm jingle bell that receives phone or mail and be provided with portable phone etc. by the user.This be because when device vibrate the user to pay close attention to the possibility of screen lower, even the user pays close attention to screen,, can reduce the possibility that the user recognizes calibration as the result of this vibration, it is less that the user experiences uncomfortable chance of calibrating initiation.In addition,, can guarantee that the user recognizes calibration, perhaps by being used in combination the attention that vibration and calibration operation attract the user by calibration operation more frequently.Because the user does not pay close attention to screen, thus with the portable phone communication process in also be more conducive to calibrate.

Can be used alone or in conjunction with each other the above-mentioned incident that is used to the source of triggering.This structure also allows to adopt a plurality of incidents, can calibrate when determining any incident.Can improve the degree of freedom of calibration operation thus significantly, allow calibration more accurately.

As previously described, feature of the present invention is that the quantity that is used to control the optical receiver of light source is lacked than the light source kind.This is because the spectrum of optical receiver is wideer than the optical emission spectroscopy of light source, so the kind of the kind analogy light source of optical receiver is few.Therefore, the present invention is applicable to wherein for example being provided with the optical receiver with Different Dynamic scope, and the structure of screen intensity is revised on degree of precision ground.Specifically, optical receiver be included in the low-light level state with the optical receiver of high Precision Detection low-light level and in the high brightness state with the optical receiver of high Precision Detection high brightness.Can use the testing result that is more suitable for from the optical receiver of the light quantity of light source to calibrate.For example, use to be provided with and to be used for two kinds of optical receivers of redness, green and blue light emitting device of RGB-LED, for example a kind ofly be used to detect low-light level, a kind ofly be used to detect high brightness and carry out calibration operation.In this case, when using conventional redness, green and blue light receiver, must six optical receivers altogether all be set to low-light level detection and high brightness detection.Not only make structure become complicated, but also make control become complicated.Yet, because only need two kinds of optical receivers, so obtained extremely significant effect in the present invention.Thereby, when using conventional method, corrected parameter not only comprise wavelength coverage but also comprise dynamic range and the situation of other parameters in, must increase the quantity of optical receiver, to form matrix, this is very complicated, but uses simple structure just to obtain these purposes in the present invention.

In the present embodiment, described wherein when launch the example that the light time carries out detecting operation in time continuous mode, but other selection is conspicuous, be continuous detecting by from the time t4 white states that produces of the light launched simultaneously of the light-emitting component of three colors upwards, and use the means of this scheme as the situation of the light quantity irregular variation that for example stops light source.In addition, can use the result who detects white states to improve the precision of calibration operation.For example, a possible method is, stores the reference data of white states in advance, if testing result greater than this reference data, then their differences between two just calculate in the reference data as weight coefficient.

Another possible method is, is provided with to have the control circuit of the circuit that is used for interim storing driver light-emitting component condition, and carries out calibration operation, and when the difference of when active mode changes to ready mode, storing between existence conditions and the reference data.When continuous circulation energized, begin to drive according to these data, and create stable condition again, to begin operation.

In addition, in the present embodiment, described the example that light source RGB-LED wherein is made up of three color redness, green and blue light-emitting component, but the present invention is not limited in this selection.For light source with emission light-emitting component of color except that redness, green and blueness, perhaps have the light source that surpasses three kinds of light-emitting components, can use the present invention similarly, as long as independent control light-emitting component.The example of this light source comprises multicolored LED, and except redness, green and blueness, it has light green and yellow light-emitting component; With dichromatism LED with blue and Yellow luminous element.In addition, in the present embodiment, RGB-LED has all and is arranged on three colors in the hermetically-sealed construction, red, green and blue light emitting device, but the light-emitting component of different colours also can be arranged in the different hermetically-sealed constructions.In addition, light source is not limited to LED, also can use electroluminescent cell or other this elements.Also can use LASER Light Source, it can show the chromaticity range of broad.

In addition, use the display panel of light supply apparatus of the present invention to be not limited to liquid crystal panel, can use any display panel that utilizes light supply apparatus.Display panels also is not limited to transmission-type, can use any panel that has regional transmission in each pixel.Also can use the Transflective liquid crystal panel that in the part of each pixel, has reflector space, all visual (visible-everywhere) Transflective liquid crystal panel or little reflective liquid crystal panel Anywhere.

In addition, in the present embodiment, use the example of portable phone, but the present invention is not limited in this selection as end device.The personal information terminal), game machine, digital camera, Digital Video and various other various mobile terminal apparatus the display device that the present invention comprises not only comprises mobile phone, but also comprises PDA (Personal Digital Asssistant:.Display device according to present embodiment not only can be installed in the mobile terminal apparatus, but also can be installed in notebook personal computer, ATM (Automatic Teller Machine), vending machine and other the various end devices.

Next, second embodiment of the present invention will be described.Fig. 6 is the skeleton view that shows according to the display device of present embodiment.As shown in Figure 6, replacement is used the transmission-type liquid crystal display panel 7 of display device 2 and light supply apparatus 1 according to first embodiment, uses the transmission-type liquid crystal display panel of operating with vertical orientated principle 71 according to display device 21 and the light supply apparatus 11 of second embodiment.The display panel, drive circuit 204 that is used to drive transmission-type liquid crystal display panel 71 is connected the control of display panel control circuit 204 controlled circuit 201 with control circuit 201.Controller is made up of control circuit 201, light source driving circuit 202 and display panel control circuit 204.As a result, control circuit 201 is controlled display panel, drive circuits 204, can reduce the transmissivity of transmission-type liquid crystal display panel 71 with particular time interval.In addition the structure of present embodiment and first embodiment's is identical.

The as above operation of the display device of the present embodiment of structure is described below; Promptly control method according to the present embodiment light supply apparatus.Fig. 7 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 7H, wherein the transverse axis of each figure is the time, Fig. 7 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Fig. 7 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Fig. 7 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Fig. 7 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Fig. 7 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Fig. 7 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Fig. 7 G has the output result's of the optical sensor that draws value on Z-axis, Fig. 7 H has the transmissivity of the transmission-type liquid crystal display panel that draws on Z-axis.

In the present embodiment, the operation of regulation light source is identical with aforementioned first embodiment's, and to as shown in the 7G, but the present embodiment difference is as Fig. 7 A, controls the transmissivity of transmission-type liquid crystal display panel 71 according to the operation of regulation light source, as shown in Fig. 7 H.Specifically, before applying t1, do not show, because display device 21 and transmission-type liquid crystal display panel 71 all disconnect.Especially, transmission-type liquid crystal display panel 71 is operated with vertical orientated principle in the present embodiment.Therefore, it is the normal black state with low transmissivity when panel disconnects.As a result, before time t1, the transmissivity of transmission-type liquid crystal display panel 71 is lower.Light supply apparatus 11 is connected at time t1 place, and to t4 place regulation light source, control circuit 201 is controlled display panel, drive circuits 204 simultaneously, to keep low transmissivity in transmission-type liquid crystal display panel 71 at time t1.For example, in order to keep low transmissivity, on whole screen, show black.As a result, time t1 keeps lower to the transmissivity of t4 place transmission-type liquid crystal display panel 71 in the mode before identical with time t1.At time t4 place, when having finished the operation of regulation light source, it is lower that transmissivity no longer keeps, and display message.

According to present embodiment, even when in the regulation light source process with the time when continuous mode is lighted color, the transmissivity that reduces the transmission-type liquid crystal display panel in regulation light source also can make the user can not feel light, and what can reduce greatly in calibration process therefore that the user feels is uncomfortable.In addition, because display panel has lower transmissivity in calibration process, so can reduce the influence of exterior light greatly.Especially, can eliminate from observer's one side and pass the display panel viewing area, arrive optical plate, pass optical plate and reach the influence of the light of optical sensor.In addition the operation of second embodiment is identical with first embodiment with effect.

In the present embodiment, described regulation light source when wherein after light supply apparatus disconnects, connecting, and the transmissivity of transmission-type liquid crystal display panel keeps low until finish the example of calibration.Yet the present invention is not limited in this selection, and another selection is, in the situation connected of light supply apparatus the transmissivity of transmission-type liquid crystal display panel is kept lower therein, and when light supply apparatus keeps connecting regulation light source.Regulation light source is suitable for revising the variation of light source with the long period section when connecting after light supply apparatus disconnects, and regulation light source is suitable for revising the characteristics fluctuation that the heat owing to the light source generation causes when light source is connected simultaneously.Preferred regulation light source when the displaying contents on the screen changes.This is because if pay close attention to regulation light source when showing the user, can reduce the brightness of display device, causes the user to feel uncomfortable.The example of this variation comprises switching display screen, scrolling menu screen etc.Specifically, make the transmissivity of transmission-type liquid crystal display panel lower, and with the switching of screen regulation light source synchronously, the user can not feel the light of launching in continuous mode of time in calibration process thus, can reduce by the transmissivity in the display device reduce to be caused any uncomfortable.

Wherein another example of displaying contents experience variation relates to following situation, promptly wherein shows the transmission information of phone or mail in the end device that can receive phone or mail.This is because send the demonstration that information can change end device.This example is applicable to following situation, and promptly wherein displaying contents is discontinuous along time shaft, for example use from selections such as menu screens, and the situation that screen display changes, perhaps dialog box is shown as the situation that requires the user to confirm.

Another possible example is when video camera begins or stop to write down.Another possible example is digital camera or the operation of the photograph with other this terminals of capturing still image.In these cases, displaying contents is not discontinuous along time shaft, carries out calibration operation but operate according to the photograph that the user wants, and the image modification that will follow calibration operation thus is in the receivable limit of user.This is preferred, has showed image change because correspond directly to user's operation.

What in the present embodiment, can reduce that the user feels in the calibration process by the transmissivity that reduces display panel in the light source calibration process is uncomfortable.Yet the present invention is not limited in this selection, also applicable to except that other situations of having a mind to reduce the display panel transmissivity situation.A possible example is that display image was exactly the situation of black originally.Specifically, control device is constructed to be permeable to detect the displaying contents on the display panel, and realizes specified conditions at displaying contents, promptly shows in the situation of black scenery etc., and control device carries out calibration operation.Can enlarge calibration condition thus, this makes correction more accurate.

Except foregoing black sight, the suitable example that detects the displaying contents condition comprises following situation, promptly changes suddenly in main brightness that shows or colouring information, for example the situation when the brightness of scenery changes suddenly; Or the unexpected situation that changes of the displaying contents of screen.

In addition, in calibration process, reduce in the situation of display panel transmissivity, can use can high-speed response liquid crystal show complementary color, the transmissivity that reduces with compensation.Specifically, when the calibration red light-emitting component, the transmissivity of the red display of display panel is reduced, and only shows green and blue.Thereby the pixel that shows is that the element with the light source that just is being calibrated is the pixel of colorimetric compensation relation.Can carry out calibration operation without being noticed thus, and bring too big variation for the displaying contents of screen.

In addition, in the present embodiment, can suitably use the display panels of normal black pattern as previously described.The example of this pattern comprises vertical alignment mode, MVA (Multi-domainVertical Alignment for example, the multidomain orientation), it has a plurality of farmlands and has the view angle dependency that reduces and PVA (Patterned Vertical Alignment composition vertical orientated), ASV (Advanced Super V, improved super V) etc.In addition, horizontal electric field mode comprises IPS (switching in the In-Plane Switching face), FFS (Fringe Field Switching, fringing field switches), AFFS (Advanced Fringe Field Switching, improved fringing field switches) etc.

Next, the 3rd embodiment of the present invention will be described.Fig. 8 is the skeleton view that shows according to the display device of present embodiment.According to the display device 22 of the 3rd embodiment and light supply apparatus 12 have with according to the display device 2 of first embodiment and the optical sensor 4 of light supply apparatus 1 diverse location, as shown in Figure 8.In first embodiment, with light incident surface facing surfaces middle part an optical sensor only is set at aforesaid optical plate 3, but in the 3rd embodiment, a plurality of optical sensors that equal light source RGB-LED quantity are set at light source place with on the light exit surface 3b facing surfaces near optical plate 3.In addition the structure of present embodiment is identical with first embodiment.

In the present embodiment, optical sensor 4 is provided with near RGB-LED with identical quantity.Can accurately calibrate LED thus.Specifically, in first embodiment, optical sensor 4 is arranged on the position of optically focused source certain distance, although can calibrate for the RGB-LED of each color of forming light source, is difficult to each LED of calibration.In the present embodiment, a plurality of light sources equal LED quantity are set, even therefore also adjustable LED in the uneven situation of LED characteristic near LED.Although the quantity of optical sensor is greater than among first embodiment, and each LED is provided with three colors, the conventional situation of red, green and blue optical sensor is compared, and the quantity of optical sensor is 1/3.Can reduce device size, reduce cost simultaneously.In addition the operation of the 3rd embodiment and effect and above-mentioned first embodiment's is identical.

Next, the 4th embodiment of the present invention will be described.Fig. 9 is the skeleton view that shows according to display device of the present invention.As shown in Figure 9, replace using among the 3rd embodiment transmission-type liquid crystal display panel 7 of display device 22 and light supply apparatus 12, display device 23 and light supply apparatus 13 according to present embodiment use transmission-type liquid crystal display panel 72, also replace optical sensor 4 and use optical sensor 41.Optical sensor 41 is the photodiodes that formed by amorphous si-layer, and described amorphous si-layer is as the semiconductor layer in the thin film transistor (TFT) of forming transmission-type liquid crystal display panel 72 pixels.Specifically, optical sensor 41 is formed on the transmission-type liquid crystal display panel 72.In addition, similar with the optical sensor 4 among the 3rd embodiment, a plurality of optical sensors 41 of the RGB-LED quantity equal to form light source are set near LED.In addition, optical sensor 41 is arranged between the viewing area and terminal part of transmission-type liquid crystal display panel 72, as shown in Figure 9.Specifically, RGB-LED is near the terminal part setting of transmission-type liquid crystal display panel 72.In addition identical among the structure of present embodiment and first embodiment noted earlier.

In the present embodiment, because optical sensor 41 is integrally formed on the transmission-type liquid crystal display panel 72, thus new optical sensor is set needn't for the zone of display panel outside, and can reduce size, reduce cost simultaneously.Usually, in frame part, the zone of display panel with terminal part is than the size of the big described at least terminal in zone that does not have terminal of non-display area.Therefore, the opposition side that optical sensor can be arranged on the light source that is used for these optical sensors terminal is set for frame part with terminal.As a result, can increase distance from the light source to the viewing area.Therefore, the brightness fluctuation in the light supply apparatus can be reduced, and display quality can be improved.In addition, optical sensor being set in having the frame part of terminal can make the output of optical sensor draw from the terminal of transmission-type liquid crystal display panel.Therefore, the space that the distribution of optical sensor need reduce on the transmission-type liquid crystal display panel can further reduce size.In addition the operation of the 4th embodiment and effect and foregoing the 3rd embodiment's is identical.

Next, the 5th embodiment of the present invention will be described.Figure 10 is the skeleton view that shows according to the display device of present embodiment.Have and display device 2 and light supply apparatus 1 essentially identical structure according to the display device 24 of the 5th embodiment and light supply apparatus 14, as shown in Figure 10 according to first embodiment.Yet, like this four RGB-LED51a of contexture

light source

51,51b, 51c, 51d promptly lights and adjusts the LED of each color separately.In addition the structure of present embodiment and foregoing first embodiment's is identical.

Operation according to the display device of the present embodiment of above-mentioned structure is described below; Promptly control method according to the present embodiment light supply apparatus.Figure 11 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 11M, wherein the transverse axis of each figure is the time, Figure 11 A has the light emissive porwer of the red element of the RGB-LED51a that draws on Z-axis, Figure 11 B has the light emissive porwer of the green components of the RGB-LED51a that draws on Z-axis, Figure 11 C has the light emissive porwer of the blue element of the RGB-LED51a that draws on Z-axis, Figure 11 D has the light emissive porwer of the red element of the RGB-LED51b that draws on Z-axis, Figure 11 E has the light emissive porwer of the green components of the RGB-LED51b that draws on Z-axis, Figure 11 F has the light emissive porwer of the blue element of the RGB-LED51b that draws on Z-axis, Figure 11 G has the light emissive porwer of the red element of the RGB-LED51c that draws on Z-axis, Figure 11 H has the light emissive porwer of the green components of the RGB-LED51c that draws on Z-axis, Figure 11 I has the light emissive porwer of the blue element of the RGB-LED51c that draws on Z-axis, Figure 11 J has the light emissive porwer of the red element of the RGB-LED51d that draws on Z-axis, Figure 11 K has the light emissive porwer of the green components of the RGB-LED51d that draws on Z-axis, Figure 11 L has the light emissive porwer of the blue element of the RGB-LED51d that draws on Z-axis, Figure 11 M has the optical sensor output result's who draws value on Z-axis.

The feature of present embodiment is that the RGB-LED51a of each color of

light source

51,51b, 51c, the light-emitting component of 51d are formed in calibration continuously.Specifically, in the time period from t1 to t2, control circuit 201 is control light source driving circuit 202 so, promptly only lights the red element of RGB-LED51a.As a result, only light the red element of RGB-LED51a, optical sensor 4 only receives the emission of this light, as Figure 11 A to as shown in the 11M.Similarly, in the time period from t2 to t3, only light the green components of RGB-LED51a, in the time period from t3 to t4, only light the blue element of RGB-LED51a.Next, in the time period from t4 to t5, only light the red element of RGB-LED51b.Because calibration is carried out in an identical manner afterwards, thus will the descriptions thereof are omitted, but light the RGB-LED51a of each color continuously, 51b, 51c, the light-emitting component of 51d, and calibrate the photocell of LED separately.

According to this embodiment, can use single optical sensor to calibrate the light-emitting component of the LED of each color of forming light source separately.Can comprise wherein in single led initial period, having uneven situation with low-cost and high-precision ground calibrating element thus.

With present embodiment and foregoing second embodiment combination also is effective.For example when connecting the portable phone power supply, in the situation of end device relative relative broad range with regard to turn-on time, can calibrate LED separately as previously described in the present embodiment, can carry out high-precision calibration, comprise wherein in the initial period of LED, having uneven situation.With regard to the time, exist in the situation relatively more among a small circle, for example when coming back to menu, can simply calibrate, wherein can make the element of LED same color simultaneously luminous, described in second embodiment.Reason is the single calibration of preferred trickle adjustment, and is all different for each LED because the inhomogeneous and time in the initial period of LED changes, and by the fluctuation that temperature variation causes identical color is tending towards identical.Therefore, simple calibration is still effectively, and correction needs the short time.

In the present embodiment, because all different for each LED, so preferably each LED stores and use the reference data of calibration apart from the distance of optical sensor.RGB-LED51a uses identical reference data with RGB-LED51d, because these two LED are equidistant apart from optical sensor 4, as shown in Figure 10.Similarly, RGB-LED51b uses identical reference data with RGB-LED51c, because these two LED are equidistant apart from optical sensor 4.Thereby, have with the LED of optical sensor 4 identical relations and share common reference data, can reduce the group number of the reference data that will store, this can further reduce cost.In addition the operation of the 5th embodiment and effect and foregoing first embodiment's is identical.

Next, the 6th embodiment of the present invention will be described.Figure 12 is the skeleton view that shows according to the display device of present embodiment.As shown in Figure 12, do not resemble display device 2 and light supply apparatus 1, the temperature sensor 6 that is provided with detected temperatures according to display device 25 and the light supply apparatus 15 of the 6th embodiment according to first embodiment noted earlier.The output of this temperature sensor 6 is connected with control circuit 201, but the output information of control circuit 201 serviceability temperature sensors 6 is controlled the operation of regulation light source.In addition the structure of present embodiment and foregoing first embodiment's is identical.

Operation according to the display device of the present embodiment of above-mentioned structure is described below; Promptly control method according to the present embodiment light supply apparatus.Figure 13 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 13H, wherein the transverse axis of each figure is the time, Figure 13 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 13 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 13 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 13 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 13 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 13 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 13 G has the optical sensor output result's who draws value on Z-axis, Figure 13 H has the output of the temperature sensor 6 that draws on Z-axis.

In the present embodiment, to as shown in the 13G, before time t1, keep normal the demonstration as Figure 13 A, so control circuit 201 control light source driving circuits 202, thereby supply with particular current to RGB-LED51.As a result, the redness of RGB-LED, green and blue light emitting device are launched the light with certain strength.In the scope of the dotted line of the output valve of temperature sensor before the time t1 as shown in Figure 13 H, when beginning, this sets up this scope.

At time t1 place, when the output valve of temperature sensor has surpassed predetermined going up in limited time of setting up, as shown in Figure 13 H, control circuit 201 starts calibration according to the fluctuation of temperature sensor output valve.Operation for this point is identical with first embodiment.Specifically, control circuit 201 is control light source driving circuit 202 so, and promptly only the red light-emitting component of RGB-LED51 is luminous, supplies with particular current to red light-emitting component.As a result, only light red light-emitting component, optical sensor 4 receives this light, and gives control circuit 201 output results.Control circuit 201 is with the reference data contrast of these results with the optical sensor 4 that sets in advance, and the control light source driving circuit.When finishing the calibration of red light-emitting component, control circuit 201 continues calibration green and blue light emitting device.Thereby, even temperature changes suddenly when just using device, also light-emitting component can be remained in the specific state, and the tone by the light of light supply apparatus emission can be remained in the specific state.In addition the operation of the 6th embodiment and effect and foregoing first embodiment's is identical.

Described the example of wherein when beginning, setting up the temperature sensor output valve, but the present invention is not limited in this selection with upper and lower bound.Can preestablish more value, when output changes and surpass these values, calibrate.More accurately treatment temperature changes thus.

In addition, temperature sensor 6 preferred light source settings near light supply apparatus.Can more accurately handle the characteristic variations that the thermal conductance that produced by light source causes thus.

In addition, also described and wherein after the output valve of temperature sensor departs from particular range, begin the example calibrated in the present embodiment immediately, but the present invention is not limited in this selection.Another selection is, calibrates when this temperature sensor output particular event takes place after departing from detecting.Specifically, be provided for checking the counter of temperature sensor output state, when the output existence of temperature sensor departed from, control circuit can be provided with this counter.Next, when turning back to menu again or when other this particular events take place, control circuit is further confirmed counter, if counter in state is set, is then just calibrated.Can stop the calibration of carrying out in necessary mode with temperature variation thus, and can reduce that the user feels uncomfortable.

Temperature sensor is formed by amorphous si-layer, and described amorphous si-layer is as the semiconductor layer in the thin film transistor (TFT) of forming the transmission-type liquid crystal display panel pixel.Temperature sensor can be integrated with display panel thus, not only can do device less and thinner, but also reduced cost, because independent temperature sensor needn't be provided.In this case, promptly on the transmission-type liquid crystal display panel in the situation of formation temperature sensor, temperature sensor preferably is formed on the display panel near light source.Can make temperature sensor detect the state of controlled light source more accurately thus.This light source also often is arranged to the zone corresponding to the terminal that forms display panel.This is because make inhomogeneous in the light quantity that light source can reduce to be caused by light source position apart from the bigger distance in viewing area.Specifically, temperature sensor is preferably formed on the framework in the zone that is provided with terminal of display panel.This zone is the part in the display panel, wherein has additional space for placing with showing irrelevant circuit, thereby can guarantee the degree of freedom of suitable laying temperature sensor.As mentioned above, the formation temperature sensor can improve the detection performance on the display panel frame of terminal being provided with, and reduces inhomogeneous in the light supply apparatus, reduces device size and thickness, and can reduce cost.Replacement is formed by thin film transistor (TFT), and temperature sensor also can be made up of the IC chip.COG (chip on the glass) method can be used for this IC chip, can be provided with this IC chip of assembling on the framework of terminal thus.

In the present embodiment, the output information that the control circuit of control light source is constructed to be permeable to the serviceability temperature sensor is controlled the operation of regulation light source, as previously described.Specifically, the characteristic of present embodiment structure is actually, and external sensor is set, and uses the information of this external sensor output to control calibration operation.Temperature sensor is an example of sensor, and the example that it only illustrates detection also can use other structures.

The possible example of another of this detection comprises that use acceleration transducer and impact microphone detect.Specifically, so construct control circuit, promptly use the output information of acceleration transducer to control the operation of regulation light source.Regulation light source when detecting acceleration and be equal to or greater than specific acceleration then.When acceleration was higher, the user can not pay close attention to and show.For example, the display device fast moving, drop or just fought for.When the user was in the environment of higher accelerations, even display device does not change with respect to user's position, the user also can not pay close attention to and show.Calibrate in this environment and can reduce the user and feel the possibility of calibration operation, what can reduce that calibration that the user feels causes is uncomfortable.Specifically, if sensor is to drawing the information that the user does not pay close attention to device, then can suitably use sensor in an identical manner.In addition, also can use the sensor of the state variation of observing particular value in the end device or bigger value similarly.

Similarly, the center of gravity sensor that comprises the variation of sense terminals device orientation is effective.Specifically, for example wherein the user on normal direction, do not observe the situation of demonstration, in the situation that screen is for example put upside down etc., carry out calibration operation.In addition, otherwise on the direction relevant, in the situation of rotation or variation the sensor that detects the display device position can be set in display device with end device.For example, display device can vertical and horizontal rotation, can detect the rotation of screen according to displaying contents in the situation of Rotation screen and calibrate the user.Even when when screen rotates, calibrating, also can reduce uncomfortable because the user does not pay close attention to display screen.Wherein to be the display device position with respect to an example of the variation of end device be in the triggering source, and the folding end device of notebook is called the clam shell pattern, and wherein display screen can open and close.Because the clam shell end device is provided with the sensor that detects folded state usually,, can reduces device size, and reduce cost so can use the triggering source of signal of sensor as calibration.Similarly, in the situation that display device can be slided with respect to end device, sensor can be set detect this sliding action, use by this sensor to sliding action as the triggering source of calibration operation.Unlike the clam shell end device, the end device that is provided with this slide mechanism can make the user watch display screen at any time.Therefore, the brightness of screen can reduce immediately in response to sliding, and by calibrating synchronously with this sliding action, can provide other responses to user's action.Improve interactive feel, obtained the user satisfaction that improves.

Other suitable examples that interactive feel improves comprise vending machine, ATM (Automatic Teller Machine), call box end device etc., and wherein the triggering source is the insertion of coin or bill.Specifically, the user can carry out the action of any kind of to end device, and carries out calibration operation according to this partial response, and the clear sensation of their actions of response is provided to the user thus.

For video camera or digital camera, the triggering source is the interpolation of belt, storer or other this storage mediums or removes, the perhaps interpolation of outer lens.

Other method provides pressure transducer, can detect the user and control display device or end device.Specifically, control circuit is configured to the output information of working pressure sensor, can control the operation of regulation light source.When the testing result of pressure transducer changed, the reason person of being to use differently controlled device, carries out calibration operation.The user can not pay close attention to display screen usually when differently controlling device.Even this is that screen state changes a little when differently controlling device because the user pays close attention to screen, the user can expect that also this variation is the result of the mode of gripping state, can not feel uncomfortable.This pressure transducer preferably is arranged on the position of the hand contact devices of user when the user controls device, more preferably is arranged on and points the position contacting place, or other have these part places of considerable influence when holding device.Can work as thus when the user differently keeps device and can detect more reliably, and improve effect of the present invention.

Another method provides and detects the sensor that the user exists, and can detect the user and watch display screen.Specifically, so construct control circuit, promptly use the output information of user's detecting sensor and control the calibration of light source.A suitable example of this sensor is to use camera to detect the sensor that the user exists.In the situation of static device, other possible examples comprise that the luminance sensor or the detection that detect the brightness variation that causes owing to the user who is positioned at device the place ahead are sitting in the sensor that is positioned at the user on the chair of device the place ahead.When not having the user or when the user begins to watch display screen, carry out calibration operation.Can prevent that thus the user from feeling calibration operation, what can reduce therefore that calibration that the user feels causes is uncomfortable.In using the situation of camera as sensor, preferably discern user's face, more preferably definite user's sight line detects the user and does not pay close attention to screen.In addition, preferably when the user blinks, detect and with synchronously carry out calibration operation nictation.Can carry out calibration operation thus, thereby the user can not feel this operation, therefore can significantly increase the number of times of the calibration operation that carries out, improve precision.

Another possible example provides the sensor of sense terminals device power supply status, and uses testing result to calibrate.In an example, end device is battery-powered, carries out calibration operation when end device switches between battery supply and external power source.What can reduce that the user feels is uncomfortable, is to change the demonstration fluctuation that causes by power supply status because the user believes this calibration operation.The actual change of power supply status fluctuates supply voltage a little, has therefore reduced the influence of this fluctuation, can make control more accurate.

External light sensor can be set as the device that detects external environment condition.The example of the unexpected variation of exterior light comprises suddenly and enters bright space from dark space, opens or closes exterior light and owing to the automobile of this device of assembling turns a corner suddenly and makes position of sun change.Thereby the unexpected variation that human eye can fast adaptation exterior light environment can not be felt calibration operation.Can prevent that thus the user from feeling calibration operation.

Next, the 7th embodiment of the present invention will be described.Figure 14 is the skeleton view that shows according to the display device of present embodiment.Replace using among the 3rd embodiment transmission-type liquid crystal display panel 7 of display device 1 and light supply apparatus 2, use transmission-type liquid crystal display panel 73 according to light supply apparatus 16 and the display device 26 of the 7th embodiment, as shown in Figure 14.Transmission-type liquid crystal display panel 73 has the color filter as element, and and between red, green and blueness the light source of flicker Show Color synchronously at a high speed, and show the image of each color component in the mode of time sequencing.In addition other structures of present embodiment and above-mentioned first embodiment's is identical.

Next, will the operation of the display device of the present embodiment of constructing according to aforesaid way be described; Promptly control method according to the present embodiment light supply apparatus.Figure 15 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 15G, wherein the transverse axis of each figure is the time, Figure 15 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 15 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 15 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 15 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 15 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 15 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 15 G has the optical sensor output result's who draws value on Z-axis.

In the present embodiment, light source calibration operation is identical with the foregoing description, but the time that the operates in t4 place and difference when finishing calibration operation afterwards of light source, as Figure 15 A to 15G.Specifically, after time t4 place reached, the redness of RGB-LED, green and blue light emitting device were lighted continuously with the short time period.Architectural feature of the present invention is, energized or trigger another predetermined operation is described in top first embodiment.

In the present embodiment, the luminous intensity the calibration process from time t1 to t4 is made as the peak strength less than light-emitting component in the procedure for displaying after time t4 reaches.The product of the launch time of color and intensity preferably is made as less than the launch time of color in the procedure for displaying and the product of intensity in the calibration process.Because reduced the light quantity in the calibration process, thus can reduce in calibration process that the user feels uncomfortable.In addition other operations of the 7th embodiment and influence and foregoing first embodiment's is identical.

Next, the 8th embodiment of the present invention will be described.The light supply apparatus of the 8th embodiment and the structure of display device are identical with display device 2 with the light supply apparatus 1 of above-mentioned first embodiment.Yet, the operation of display device; Promptly control method difference according to the present embodiment light supply apparatus.Figure 16 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 16G, wherein the transverse axis of each figure is the time, Figure 16 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 16 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 16 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 16 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 16 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 16 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 16 G has the optical sensor output result's who draws value on Z-axis.

In above-mentioned first embodiment, calibration operation is revised light-emitting component separately by redness, green and the blue order of RGB-LED, and in the present embodiment, makes luminous calibration of light-emitting component while of each color.Showed consistently that before time t1 to as shown in the 16G, redness, green and blue light emitting device are luminous consistently as Figure 16 A.When at time t1 place beginning calibration operation, the light-emitting component of each color between time t1 and the t2 with time t1 before identical state luminous with the identical cycle, by the light quantity of light sensors in this time period process.The result of this sensor is kept in the control circuit.Next, in the time period from t2 to t3, connect green and blue light emitting device, disconnect red light-emitting component.The light quantity of light sensors in this time period and calculate with detected value poor the time period from t1 to t2.Because this value is the light quantity of red light-emitting component emission, thus control circuit this difference is compared with reference value, thereby the control light source driving circuit.In a similar fashion, in the time period from t3 to t4, connect redness and blue light emitting device, disconnect green luminousing element.The testing result of optical sensor deducts from time t1 to the testing result of t2 the time period in this time period, calculates the light quantity of green luminousing element thus.In the time period from t4 to t5, connect redness and green luminousing element, disconnect blue light emitting device, calculate the light quantity of green luminousing element from testing result.

In the present embodiment, from normal when luminous the testing result of optical sensor calculate the testing result of optical sensor when disconnecting the light-emitting component that will be corrected, so eliminated the influence of exterior light.In other words, for the normal testing result and the testing result of optical sensor when disconnecting the light-emitting component that will be corrected of optical sensor when luminous, think the equivalence that influences of exterior light, by deducting the influence that these results can eliminate exterior light.In addition, because only disconnected the light-emitting component that will be corrected, so that the user who has reduced to follow calibration operation to occur feels is uncomfortable, this is because calibrate in the state that occurs in being in close proximity to procedure for displaying.In addition, can reduce the influence of high level noise, because reduced the number of times that light source disconnects in the calibration process by the light quantity that reduces light source.In addition other operations of the 8th embodiment and influence and above-mentioned first embodiment's is identical.

Next, the 9th embodiment of the present invention will be described.Figure 17 is the skeleton view that shows according to the display device of present embodiment.According to the light supply apparatus 17 of the 9th embodiment and display device 27 and display device 2 and light supply apparatus 1 different being, except optical sensor 4, also use optical sensor 42, as shown in Figure 17 according to above-mentioned first embodiment.As mentioned above, the optical sensor shown in the first embodiment of the invention 4 is used for corresponding to redness, green and the blue wavestrip of planting spectrum as the RGB-LED list of light source.In view of this fact, in the present embodiment, for convenience's sake, optical sensor 4 is called the white light sensor.On the contrary, optical sensor 42 is the optical sensors of so constructing, and promptly it only has susceptibility in the wavestrip of red light.Optical sensor 42 will be called the red light sensor.For example realize red light sensor 42 by the red color filter that the light in the transmits red wavestrip is set in optical sensor the place ahead.In centre of surface zone, single white light sensor 4 and single red light sensor 42 are set with respect to the light incident surface 3a of optical plate 3.Optical sensor 4 and 42 output information are input to control circuit 201.Specifically, control circuit 201 uses the output information of white light sensor 4 and red light sensor 42 to come regulation light source.In addition the structure of the 9th embodiment and above-mentioned first embodiment's is identical.

Next, will the operation of the display device of the present embodiment of constructing according to aforesaid way be described; Promptly control method according to the present embodiment light supply apparatus.Figure 18 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 18H, wherein the transverse axis of each figure is the time, Figure 18 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 18 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 18 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 18 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 18 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 18 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 18 G has the red light sensor output result's who draws value on Z-axis, Figure 18 H has the white light sensor output result's who draws value on Z-axis.

In the 9th embodiment, light supply apparatus disconnected before time t1, disconnected RGB-LED, as shown in Figure 18.As a result, the output result of optical sensor is roughly 0, as shown in Figure 18 G and 18H.Connect light source at time t1 place.Specifically, when control circuit 201 received the order that becomes on-state, control circuit 201 was connected redness and the green luminousing element of RGB-LED51 simultaneously, as Figure 18 A to as shown in the 18C.This time period is the time period from t1 to t2, sets in advance the initial value of electric current in control circuit 201.This scheduled current flows to redness and green luminousing element, connects redness and green luminousing element thus, as Figure 18 D to as shown in the 18F.Red light sensor 42 receives the light of red light-emitting components, as shown in Figure 18 G, and the result is outputed to control circuit 201.White light sensor 4 receives the light of red and green luminousing element, as shown in Figure 18 H, and the result is outputed to control circuit 201.Control circuit 201 uses the electric current that flows to red element from the input adjustment of red light sensor 42, so that the light that the red light-emitting component emission has predetermined light quantity.By using constant feedback system control red element from 42 constant outputs of red light sensor.Simultaneously, control circuit 201 calculated example are as the input from red light sensor 42 and white light sensor 4, obtaining their differences between two, thereby calculate the light quantity of green luminousing element.Dotted line represents to set in advance the reference data of the optical sensor 4 in control circuit 201, i.e. expression is when optical sensor 4 should be exported during with ideal tensile strength connection green luminousing element the time period from t1 to t2 data.When solid line and dotted line separated, control circuit 201 just determined that the luminance of the green luminousing element of RGB-LED51 has departed from reference state.Specifically, with respect to reference data, control circuit 201 is checked the result who is detected by optical sensor 4, control light source driving circuit 202, with when testing result greater than reference data time restriction emissive porwer, and control light source driving circuit 202, thereby when exporting the result, increase emissive porwer less than reference data.When testing result equals reference data, so control light source driving circuit 202, promptly emissive porwer remains present level.Emissive porwer with green luminousing element is calibrated to reference state thus.

Next, when finishing the calibration of green luminousing element in time t2, the electric current that control circuit 201 will flow to green luminousing element is made as 0, and makes scheduled current flow to blue light emitting device.Only connect blue light emitting device thus, to calibrate blue light emitting device with the same mode of green luminousing element.This time period is from t2 to t3.

When in the time period from t1 to t3, finishing the calibration of RGB-LED51, connect green and blue light emitting device simultaneously at time t3 place.In the present embodiment, even in the time period from t1 to t3, red light-emitting component also is in illuminating state.In the drive condition of time t3 place light-emitting component, use calibration result from t1 to the t3 time period, as Figure 18 A to as shown in the 18F.Thus because light-emitting component remains in the predetermined state, so the tone of the light that light supply apparatus can be launched remains in the predetermined state.

In the present embodiment, use two kinds of optical sensors for three kinds of light-emitting components, and two kinds of light-emitting components are glimmered in the mode of time sequencing, carry out the calibration operation of light source thus.Because the kind of optical sensor less than the kind of light source, so compare with the light source that uses the equal number kind and the situation of optical sensor, can reduce the cost and the size of light supply apparatus.Compare with above-mentioned first embodiment, reduce to 2/3 with time period of time sequencing mode light source luminescent, and because make two kinds of light sources simultaneously luminous, so in testing process, can reduce brightness.The user unlikely distinguishes calibration operation thus, and reduce to follow calibration operation and occur uncomfortable.One of being used in particular in three kinds of light-emitting components in two kinds of optical sensors has selected red light-emitting component.Usually, because green and blue light emitting device is made up of similar component, so these light-emitting components have similar characteristic.On the contrary, because red light-emitting component is made up of diverse component, so characteristic is different greatly, especially, red light-emitting component is than green or the easier loses stability of blue light emitting device.In view of this situation, make red light-emitting component through constant FEEDBACK CONTROL with remarkable different qualities, control red light-emitting component thus accurately.Green and the comparable red light-emitting component of red light-emitting component is more stably operated, and the fluctuation of these two kinds of light-emitting component characteristics is similar.Therefore, replace constant FEEDBACK CONTROL, can use simple calibration operation.Like this, when reducing size and cost, can obtain the high performance of control operation.

In the present embodiment, it is luminous consistently to have described in green and blue light emitting device calibration operation process red light-emitting component, but the present invention is not limited in this structure, can disconnect red light-emitting component.In this case, carry out calibration operation by independent transmitting green and blueness.Therefore, preferably than increasing in the normal operations process and launching more light quantity.Because do not need red light-emitting component, so do not need to control the calibration of green and blue light emitting device.Therefore, can construct control circuit in simple mode.In addition the operation of the 9th embodiment and effect and above-mentioned first embodiment's is identical.

Next the of the present invention ten embodiment described.Figure 19 is the skeleton view that shows according to the display device of present embodiment.According to the light supply apparatus 18 of the tenth embodiment and light supply apparatus 1 and display device 2 different types of light supply apparatus 18 and the display device 28 among display device 28 uses and above-mentioned first embodiment, as shown in Figure 19.Specifically, in above-mentioned first embodiment, use to have three kinds of colors, the RGB-LED of promptly red, green and blue light emitting device is as light source, but the present embodiment difference is to use BY-LED.The LED that BY-LED is made up of blue light emitting device and yellow fluorophor, described yellow fluorophor use by the blue light of blue light emitting device emission and launch sodium yellow, and use blue and sodium yellow emission white light.Although it launches white light, because the yellow light intensity of yellow fluorophor emission and the luminosity of blue light emitting device, this White LED still has slightly different tone.Specifically, when the sodium yellow balance of the blue light of blue light emitting device emission and yellow fluorophor emission, just launch white light.When the blue light of blue light emitting device emission during, just launch blue white light than the yellow light intensity of yellow fluorophor emission.In the present embodiment, use two kinds of BY-LED with different tones.A kind of is the BY-LED52a of emission white light, and another kind is the BY-LED52b of the blue white light of emission.For example, the chromaticity coordinate of the xy chromatic graph of white BY-LED52a and blue and white BY-LED52b be respectively (x, y)=(0.32,0.32) and (0.26,0.26).In other words, BY-LED52a has the white of yellow tone a little.Light incident surface 3a along optical plate 3 is provided with a plurality of these two kinds of BY-LED, and for example quantity is two white BY-LED52 and two blue BY-LED52b.Be arranged alternately this two kinds of BY-LED, thus the setting adjacent one another are of different kinds.Light source driving circuit 202 is constructed to be permeable to two kinds of BY-LED of individual drive.In addition the structure of present embodiment and above-mentioned first embodiment's is identical.

Next the operation of the display device of the present embodiment of constructing according to aforesaid way is described; Promptly control method according to the present embodiment light supply apparatus.Figure 20 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 20E, wherein the transverse axis of each figure is the time, Figure 20 A have on Z-axis, draw send to the electric current of white BY-LED by light source driving circuit, Figure 20 B have on Z-axis, draw send to the electric current of blue and white BY-LED by light source driving circuit, Figure 20 C has the light emissive porwer of the white BY-LED that draws on Z-axis, Figure 20 D has the light emissive porwer of the blue and white BY-LED that draws on Z-axis, Figure 20 E has the optical sensor output result's who draws value on Z-axis.

In the tenth embodiment, before time t1, disconnect light supply apparatus, and disconnect BYB-LED, as shown in Figure 20.As a result, the output result of optical sensor also is 0 roughly, as shown in Figure 20 E.Control circuit 201 is connected white BY-LED52a when connecting light source at time t1 place, as shown in Figure 20 A and 20B.This time period is provided with the initial value of electric current in advance in control circuit 201 from t1 to t2.This scheduled current flows to white BY-LED52a, connects white BY-LED52a thus, as Figure 20 C to as shown in the 20D.Optical sensor 4 receives the light of white BY-LED52a, as shown in Figure 20 E, and the result is outputed to control circuit 201.Dotted line has shown the reference data of the optical sensor 4 that sets in advance in control circuit 201, i.e. expression is when optical sensor 4 should be exported during with ideal tensile strength point brilliant white BY-LED52a the time period from t1 to t2 data.When solid line and dotted line separated, control circuit 201 had departed from reference state with regard to the luminance of determining white BY-LED52a.Specifically, with respect to reference data, control circuit 201 is checked the result who is detected by optical sensor 4, control light source driving circuit 202, with when testing result greater than reference data time restriction emissive porwer, and control light source driving circuit 202, thereby when exporting the result, increase emissive porwer less than reference data.When testing result equals reference data, so control light source driving circuit 202, promptly emissive porwer remains present level.Emissive porwer with white BY-LED52a is calibrated to reference state thus.

Next, when finishing the calibration of white BY-LED52a in time t2, the electric current that control circuit 201 will flow to white BY-LED52a is made as 0, and makes scheduled current flow to blue and white BY-LED52b.Only connect blue and white BY-LED52b thus, to calibrate blue and white BY-LED52b with the same mode of white BY-LED52a.This time period is from t2 to t3.

When in the time period from t1 to t3, finishing the calibration of white BY-LED52a and blue and white BY-LED52b, connect white BY-LED52a and blue and white BY-LED52b simultaneously at time t3 place.In the drive condition of time t3 place light-emitting component, use calibration result from t1 to the t3 time period, as Figure 20 A to as shown in the 20E.Thus because light-emitting component remains in the predetermined state, so the tone of the light that light supply apparatus can be launched remains in the predetermined state.

The feature of present embodiment is that two kinds of LED have relatively similarly spectrum.Like this, use the method for the conventional color filter of light source can not obtain high-precision calibration with similar spectrum.This is that color filter can not fully separate emission spectrum because of the following fact.On the contrary, in the present invention, order light emission service time is even when use has the light source of similar emission spectrum, also can carry out High Accuracy Control.A possible case that wherein needs this High Accuracy Control is a situation of adjusting white color according to service environment a little.For example for having blue and white light and the fluorescent light with bulb of yellow tone, even when the identical white of display device demonstration, the user also can notice different tones.This is because user's eyes have adapted to surround lighting.In view of this situation, when fluorescent illumination, make blue and white BY-LED launch light more consumingly, show to obtain blue and white, when throwing light on, bulb make white BY-LED launch light more consumingly, to obtain to have the white demonstration of yellow tone.The user recognizes and shows identical white thus.Another example that needs High Accuracy Control corresponding to light source over time.In the BY-LED that uses blue light emitting device and yellow fluorophor, because blue light emitting device changes in time more significantly than yellow fluorophor, so when BY-LED use long period section, the light of emission progressively becomes yellow tone.In view of this situation, can show identical white consistently by changing the change emission ratios in time.

The chromaticity coordinate of LED only is an example in the present embodiment, can use the LED with other chromaticity coordinates.In addition, described wherein the LED that blue light emitting device and yellow fluorophor is combined into light source, but the present invention is not limited in this structure.For example can use cold cathode fluorescent tube.Also can use the White LED of following kind, promptly wherein in LED combination blue light emitting device and green and yellow fluorophor are arranged and by making up the White LED that UV-light luminous element and blueness, green and red-emitting phosphors obtain.The color of LED emission is not limited to white, can also be applied to the LED that for example combination has blue light emitting device and red-emitting phosphors similarly.Also can advantageously the RGB-LED among the BY-LED in the present embodiment and above-mentioned first embodiment be made up.Usually, BY-LED has better power efficiency than RGB-LED, therefore can and use the low-power of utilizing BY-LED to show and utilize the demonstration of the wide chromaticity range of RGB-LED according to the condition switching.In addition the operation of the tenth embodiment and effect and above-mentioned first embodiment's is identical.

Next, the 11 embodiment of the present invention will be described.The light supply apparatus of the 11 embodiment is identical with display device 2 with the light supply apparatus 1 of above-mentioned first embodiment with the structure of display device.Yet the method for control light source is different.In view of the foregoing, will omit the description of the 11 embodiment, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 21 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 21G, wherein the transverse axis of each figure is the time, Figure 21 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 21 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 21 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 21 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 21 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 21 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 21 G has the optical sensor output result's who draws value on Z-axis.

In the 11 embodiment, before time t1, disconnect light supply apparatus, in time period t 1 to t4, carry out the operation of detection light source state., between time t4 and t5, revise, as shown in Figure 21.Detecting operation in the time period from t1 to t4 is identical with above-mentioned first embodiment, and therefore the descriptions thereof are omitted.The feature of present embodiment is to revise in the cycle from t4 to t5.In above-mentioned first embodiment, use the sensor result that follows closely after detecting to revise.Point of discontinuity place on time shaft for example uses this control when light source when off-state changes to on-state.Yet when using the control method of first embodiment in the situation that does not change at displaying contents, because this is revised, the tone of screen changes fast, and it is uncomfortable that the user feels.In view of this situation, the preset time constant is provided, and revises operation, with the user who reduces to cause by the tonal variation of screen in makeover process feel uncomfortable.For example, the t1 that will carry out the part detecting operation is made as 16ms to the time period of t2, and the time period from t4 to t5 that will revise operation was made as 10 seconds.The people is very sensitive to the quick variation response on the time shaft, but relatively less responsive to changing more slowly.In the present embodiment, because carry out the long period, for example 10 seconds tonal correction is not revised operation so the user notices, can reduce owing to carrying out uncomfortable that control of the present invention causes.

Uncomfortable for what reduce to be caused by control of the present invention, as the purpose of present embodiment, it is effective separating on the time and carrying out detecting operation and revise operation.Specifically, in above-mentioned first embodiment neutralized the 11 embodiment, in the time period from t1 to t4, the testing result that use follows closely after the detecting operation was revised.Yet, for example in the present embodiment,, apply the state that exists before the time t1 of certain hour section having finished time period t 1 after the detecting operation of t4.It is effective revising operation after the predetermined amount of time of having passed.In addition the operation of the 11 embodiment and effect and above-mentioned first embodiment's is identical.

Next, the 12 embodiment of the present invention will be described.The 12 to execute the structure of the light supply apparatus of scheme and display device identical with display device 2 with the light supply apparatus 1 of above-mentioned the 11 embodiment.Yet the method for control light source is different.In view of the foregoing, will omit the description of the 11 embodiment, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 22 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 22G, wherein the transverse axis of each figure is the time, Figure 22 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 22 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 22 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 22 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 22 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 22 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 22 G has the optical sensor output result's who draws value on Z-axis.

In the 12 embodiment, before time t2 and t3 with afterwards time period in control and above-mentioned the 11 embodiment different of light source, as shown in Figure 22.Specifically, in above-mentioned the 11 embodiment, disconnect red light-emitting component, connect green luminousing element, and in the 12 embodiment, connect redness and green luminousing element simultaneously at time t2 place, in Figure 22 A and 22B, or shown in Figure 22 D and the 22E.This is because the following fact, promptly connects green luminousing element before time t2, disconnects red light-emitting component after having crossed time t2, the result, before time t2 with red and green luminousing element afterwards with identical time remaining luminous the regular hour section.The output of light source is before time t2 and afterwards red and green luminousing element continues the result of the bigger output of detection in the simultaneously luminous described periodic process, as shown in Figure 22 G.This expression has obtained bright state as the result who puts shiny red and green luminousing element simultaneously.Similarly, before time t3 and the time t3 place of putting bright green and blue light emitting device in the time period afterwards simultaneously have the regular hour section.Light quantity is detected at the place in the time except that lighting at least two kinds of light-emitting components.

In the present embodiment, in the time period of detecting the light quantity that produces by light source, the time period that provides two or more at least light-emitting components to light simultaneously.Reduce the light quantity of light source in the testing process temporarily, and can solve the user and feel uncomfortable problem.This is because the following fact, and promptly human eye has experienced the residual image influence, and reduces the time period of light source light quantity and do not feel temporarily the reducing of light quantity by shortening.The people can not notice that temporarily the time that light quantity reduces changes according to display brightness and various other conditions.Yet, the time period that temporarily reduces light quantity according to testing result preferably be made as discover for the user less than, this is conspicuous.In the present embodiment, the detecting operation of light-emitting component is made as discontinuous, and the time period that light quantity wherein can be reduced was made as than the shorter time period of light-emitting component that relates to each color in the detecting operation continuously thus, had reduced the uncomfortable of user.

In the present embodiment, the light-emitting component that light quantity detects in time can be simultaneously luminous, but the present invention is not limited to this structure.For example, in the time period of detecting red and green luminousing element, connect blue light emitting device.In addition, be set the time period of wherein lighting all light-emitting components simultaneously.In this case, preferably increase light quantity and reduce fluorescent lifetime, thereby also reduced light quantity fluctuation in time.More preferably, making the light quantity of the light-emitting component of each color is uniform in time in the time period from t1 to t4.Carry out detecting operation thus, keep identical tone and the light quantity that before time t1, exists simultaneously, can reduce the user considerably and feel that ground is uncomfortable.In addition the operation of the 12 embodiment and effect and above-mentioned the 11 embodiment's is identical.

Next, the 13 embodiment of the present invention will be described.The light supply apparatus of the 13 embodiment is identical with display device 2 with the light supply apparatus 1 of above-mentioned the 11 embodiment with the structure of display device.Yet the method for control light source is different.In view of the foregoing, will omit the description of the 13 example structure, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 23 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 23G, wherein the transverse axis of each figure is the time, Figure 23 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 23 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 23 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 23 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 23 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 23 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 23 G has the optical sensor output result's who draws value on Z-axis.

In the 13 embodiment, before time t2 and t3 with afterwards time period in control and above-mentioned the 11 embodiment different of light source, as shown in Figure 23.Specifically, in the 13 embodiment, before the time t2 and time period of the state that exists before being used for recovery time t1 is provided afterwards.Similarly, before the time t3 and time period of the state that exists before being used for recovery time t1 is provided afterwards.State before the time t1 is following state, i.e. the state that existed before the operation of detection light source state begins.In other words, the main points of present embodiment are, introduce the luminance that exists before detecting beginning between the section in the detection time of the light-emitting component of each color.Only in the time period that each light-emitting component is connected, carry out the detecting operation of each colour light emitting element.

When calibration operation, at first only connect red light-emitting component, and detect the luminance of red light-emitting component, as shown in Figure 23 at time t1 place beginning light source.Before time t2, connect the light-emitting component of all colours, after having crossed time t2, only light green luminousing element, and detect the luminance of green luminousing element.Similarly, before time t3, connect the light-emitting component of all colours, after having crossed time t3, only connect blue light emitting device, and detect the luminance of blue light emitting device.Like this, the time period of the light source state that exists before in the detecting operation process of the light-emitting component of all colours, being provided for being reproduced in time t1.

In the present embodiment, in the time period process that detects by the light quantity of light emitted, be provided for reproducing the time period of the luminance of the light source that exists before detecting.The state of light source is owing to detecting operation changes, and solved uncomfortable that the user feels thus.Therefore, detect the light-emitting component of each color in the state of the state that before near detecting operation, exists, also shown the effect that improves accuracy of detection.

That provide in the time period in each color detection and reproduce the length of the time period of the light source state that exists before the detecting operation and be not particularly limited, but prolonging this time period can reduce the frequency that reduces in the light quantity.And preferred this situation.Yet,, just reduced the frequency that detects if the time period is long.Therefore, the length of time period is made as suitable value.Construct control circuit, thereby the length of time period is set.In the situation etc. of declaration temperature variation, this length so is set, promptly duplicate detection is several times in the short time period.In addition the operation of the 13 embodiment and effect and above-mentioned the 11 embodiment's is identical.

Next, the 14 embodiment of the present invention will be described.The light supply apparatus of the 14 embodiment is identical with display device 2 with the light supply apparatus 1 of above-mentioned the 11 embodiment with the structure of display device.Yet the method for control light source is different.In view of the foregoing, will omit the description of the 13 example structure, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 24 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 24G, wherein the transverse axis of each figure is the time, Figure 24 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 24 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 24 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 24 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 24 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 24 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 24 G has the optical sensor output result's who draws value on Z-axis.

In the 14 embodiment, before time t2 and time t3 and after control and above-mentioned the 11 embodiment different of light source in time period of providing, as shown in Figure 24.Specifically, in the 14 embodiment, before time t2 and provide green afterwards and the luminous time period of blue light emitting device, these colors are at the complementary color that carries out the red light-emitting component of detecting operation from t1 to t2 the time period.Similarly, provide light-emitting component the luminous time period after before time t3, these light-emitting components be compensation relationship at the light-emitting component that carries out detecting operation from t2 to t3 the time period.Before time t4 and provide light-emitting component the luminous time period afterwards, these light-emitting components be compensation relationship at the light-emitting component that carries out detecting operation from t3 to t4 the time period.In other words, the feature of present embodiment is following operation, promptly wherein at first lights the light-emitting component that will carry out detecting operation, and lighting then with top light-emitting component is the light-emitting component of compensation relationship.

When at time t1 place beginning calibration operation, at first only light red light-emitting component, and detect the luminance of red light-emitting component, as shown in Figure 24.Point bright green and blue light emitting device before time t2, and after having crossed time t2, only light green luminousing element, and detect the luminance of green luminousing element.Similarly, some shiny red and blue light element before time t3, and after having crossed time t3, only light blue light emitting device, and detect the luminance of blue light emitting device.Before time t4, connect redness and green elements.Like this, in the detecting operation process of each light-emitting component, provide and light the time period of the light-emitting component of look by way of compensation.Carry out detecting operation in time period complementally lighting light-emitting component ground, each color ground.

In the present embodiment, provide the following time period in the time period of detection by the light quantity of light emitted, promptly detecting therein with light-emitting component is the light-emitting component of complementary colors relation.Usually, when light source switched at a high speed, the user can notice the time average of luminance, but can make the average color of section detection time approaching white by the light-emitting component of lighting complementary color, shown in the present embodiment.In above-mentioned first embodiment, time t1 is average and obtain white to t4, but in this embodiment, will time t1 before the t2 and the time period afterwards average and obtain white, therefore can obtain white states with the short time period.As a result, can reduce the danger that the user feels that time sequencing is luminous.Especially watch mobile communication terminal etc. at a high speed in the situation of operation the user, time sequencing emitting space ground is cut apart, so increased the user and feel the danger that time sequencing is luminous.On the contrary, in the present embodiment, because to average, so can reduce this danger than the short time period.

The emission of the light of complementary colors is preferred average and to obtain in the light quantity of white be a kind of balance between in use.For example, when putting bright green and blue light emitting device after the process neutralization of considering the detection red light-emitting component, red light quantity and green with blue light quantity are set so preferably, promptly described balance is a white.Can reduce the danger that the user feels that time sequencing is luminous greatly thus.

In the present embodiment, light and to carry out the light-emitting component of detecting operation, connect the light-emitting component of complementary colors then, but the present invention is not limited to this structure, can more early connect the light-emitting component of complementary colors, or only connect the light-emitting component of complementary colors in the section process in detection time.In addition the operation of the 14 embodiment and effect and above-mentioned the 11 embodiment's is identical.

Next, the 15 embodiment of the present invention will be described.The light supply apparatus of the 15 embodiment is identical with display device 2 with the light supply apparatus 1 of above-mentioned the 11 embodiment with the structure of display device.Yet the method for control light source is different.In view of the foregoing, will omit the description of the 15 example structure, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 25 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 25G, wherein the transverse axis of each figure is the time, Figure 25 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 25 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 25 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 25 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 25 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 25 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 25 G has the optical sensor output result's who draws value on Z-axis.

In the 15 embodiment, the photoemissive method of control is different with other embodiment in the time period of detection light source state, as shown in Figure 25.Specifically, in the 15 embodiment, detect the state of red light-emitting component, connect green luminousing element, disconnect red light-emitting component, detect the state of red and green luminousing element together.Next, connect redness, green and blue light emitting device, detect this state in combination.The desirable output data of light source is preset in the control circuit as with reference to data when connecting red light-emitting component.Preset the ideal data of light source when connecting red and green luminousing element in an identical manner, it is the ideal data of light source when connecting all light-emitting components.Control circuit is produced preset data in advance by above-mentioned control method testing result contrast, the control light-emitting component.

In the time period from t1 to t2, carry out the detecting operation of red light-emitting component, as shown in Figure 25.Similarly, in the time period from t2 to t3, carry out the detecting operation of red and green luminousing element, in the time period from t3 to t4, carry out all light-emitting components, be i.e. the detecting operation of redness, green and blue light emitting device.

In the present embodiment, in the state of connecting at least a light-emitting component consistently, carry out calibration operation.According to the state and the kind of light-emitting component, and compare when carrying out the on/off operation steady state when carrying out detecting operation, there is a little a bit light-emitting component of fluctuation of characteristic here.In the present embodiment, especially can obtain higher control ability by lighting light-emitting component consistently with this unstable characteristic.Described in other embodiment, to compare with blue light emitting device with green, red light-emitting component has bigger characteristics fluctuation.In view of this fact, can improve control ability by lighting red light-emitting component consistently, described in present embodiment.When with above-mentioned first embodiment in when contrasting because present embodiment reduces to resolve the ratio in source that opens the light, feel the danger of calibration operation so can reduce the user.

In the present embodiment, light-emitting component quantity can increase continuously two or more light-emitting component colors from single light-emitting component color, and carry out detecting operation, but the present invention is not limited to this structure, the quantity of light-emitting component can be reduced to two and a light-emitting component color from three light-emitting component colors continuously, carries out detecting operation then.Thus because produced the state of continuity point bright light source,, also the order of change color can be become continuously from single color to three and two colors so can improve accuracy of detection.

Do not observe in being used as the light-emitting component characteristic of light source when changing, preferred green luminousing element keeps constant lighting.The people is generally to green sensitive, even therefore also can reduce uncomfortable when constant the lighting of green maintenance.

Three kinds of data that are preset in the control circuit have been described in the present embodiment, promptly when red light-emitting component is luminous default data, when redness and green components are luminous default data and the data of when the element of all colours is luminous, presetting, but the present invention is not limited to this structure.For example, preset data respectively when red, green and blue element are luminous is used these data computation and is produced the reference data of present embodiment testing result.Provide this computing power can cause complicated more control circuit, but with regard to improving the performance and the aspect that reduces cost, this circuit is progressive, another method is thought of as the use maximization with computing power.Type according to calibration is come blocked operation, has control circuit with reference to the described various default calibration operations of the embodiment of the invention by setting, but high-performance ground carries out calibration operation.In addition the operation of the 15 embodiment and effect and above-mentioned first embodiment's is identical.

Next, the 16 embodiment of the present invention will be described.The light supply apparatus of the 16 embodiment is identical with display device 2 with the light supply apparatus 1 of above-mentioned first embodiment with the structure of display device.Yet the method for control light source is different.In view of the foregoing, will omit the description of the 15 example structure, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 26 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 26G, wherein the transverse axis of each figure is the time, Figure 26 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 26 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 26 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 26 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 26 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 26 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 26 G has the optical sensor output result's who draws value on Z-axis.

In the 16 embodiment, the photoemissive method of control is different with other embodiment in the time period of detection light source state, as shown in Figure 26.Specifically, in other embodiments, a plurality of light-emitting components of forming light source have formed one group, and carry out calibration operation.Yet, in the 16 embodiment, in single calibration operation, only make a kind of light-emitting component experience detect and revise operation.Detect and revise operation and carry out, for example redness is carried out, then redness is being carried out, subsequently green is carried out not according to the order of each colour light emitting element.With with above-mentioned the 11 mode that embodiment is identical, the state of the description assumed position bright light source of present embodiment is the predetermined state that existed before time t1.

Carry out the detecting operation of red light-emitting component in time period between time t1 and t2, as shown in Figure 26, the example of this time period is 16ms.Reflect testing result at time t2 place, revise the light quantity of red light-emitting component, normally show afterwards.This time period is the time period from t2 to t3, for example is made as 60 seconds.Similarly, carry out the detecting operation of red light-emitting component in the time period between time t3 and t4 once more, reflect the result at time t4 place, and normally show.Time period from t4 to t5 was made as 60 seconds similarly.In the time period from t5 to t6, carry out the detecting operation of green luminousing element, reflect the result at time t6 place, and normally show.Like this, in the present embodiment red light-emitting component is carried out twice detection and revises operation, green luminousing element is carried out once.When this state triplicate, blue light emitting device is carried out one-time detection and revises operation.In other words, the number of times ratio that respectively red, green and blue light emitting device is detected and revise operation is 6: 3: 1.

In the present embodiment, only a kind of light-emitting component is carried out detecting operation, carry out the single calibration.Therefore, reduced the required time of detecting operation, and can reduce relevant with calibration operation by the user feel uncomfortable.Kind according to light-emitting component can add re-detection and revise operation, especially only the particular color of marked change is calibrated.For example, in the LED with three color RGB, red light-emitting component is made up of the element system different with blueness or green luminousing element, and characteristic is normally different.Therefore, can implement the present invention effectively by the more attention of calibration of giving red light-emitting component.When energized, calibrate all colors, behind the predetermined amount of time of having passed, only calibrate red or a part of color again, perhaps use the combination of these color calibrations.Calibration accuracy can be improved thus, influence can be reduced simultaneously the user.The influence of blue light emitting device fluctuation is less than the influence of green luminousing element fluctuation.Therefore, can reduce the frequency that blue light emitting device detected and revised operation, and reduce the frequency of calibration operation, or give the correction Resources allocation of other colors.

In the present embodiment, described following structure, promptly wherein only a kind of light-emitting component has been carried out the single detecting operation, but the present invention is not limited to this structure, can carry out the single detecting operation two kinds of light-emitting components.It is described that the order of light-emitting component calibration operation and frequency are not limited to present embodiment, and it can suitably be revised according to condition.For example, can only determine the frequency of each colour light emitting element calibration, and introduce randomness for actual the execution, for example order, the calibration between time period or other parameters, thus because even the supposition situation person of being to use has felt that calibration operation also can obtain the nonanticipating ability, so can reduce uncomfortable.In addition the operation of the 16 embodiment and effect and above-mentioned first embodiment's is identical.

Next, the 17 embodiment of the present invention will be described.The light supply apparatus of the 17 embodiment is identical with display device 2 with the light supply apparatus 1 of above-mentioned first embodiment with the structure of display device.Yet the method for control light supply apparatus is different.In view of the foregoing, will omit the description of the 17 example structure, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 27 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 27G, wherein the transverse axis of each figure is the time, Figure 27 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 27 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 27 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 27 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 27 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 27 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 27 G has the optical sensor output result's who draws value on Z-axis.

In the 17 embodiment, wherein do not make the similar of the independent luminous fact of the light-emitting component of each color and the 8th embodiment of the invention described above, as shown in Figure 27.Yet in the present embodiment, wherein the testing result of all luminous steady state of all colours fact that is used to calibrate is very different with above-mentioned the 8th embodiment, has simplified control circuit.Comparable above-mentioned the 8th embodiment shortens the alignment time.

Connect light source in the schedule time before time t1, as shown in Figure 27.Specifically, connect all types of light-emitting components, but by the light sensors light quantity, and control consistently, thereby compare with the predetermined reference data that is stored in the control circuit.Control method before the time t1 is identical with control method after time t3 reaches.Therefore after this control method will be described.At time t1 place, disconnect blue light emitting device, connect redness and green luminousing element.Use optical sensor to carry out detecting operation, because the result is lower than reference data, so increase the light quantity of green luminousing element.This moment, the light quantity of red light-emitting component kept constant.Next, at time t2 place, connect redness and blue light emitting device.Use optical sensor to carry out detecting operation, because the result is higher than reference data, so reduce the light quantity of blue light emitting device.At last, at time t3 place, connect all light-emitting components.At this some place, service time, t1 connected green and blue light emitting device to the result of t3, wherein increased the light quantity of green luminousing element, reduced the light quantity of blue light emitting device.Detect whole light quantity then,, then just increase the light quantity of red light-emitting component if the result is lower than reference data.After time t3 reaches, detect the state that all light-emitting components are all connected, the control red light-emitting component.

In the present embodiment, use the testing result of the steady state that all light-emitting components all connect to reduce the necessary alignment time,, feel the danger of detecting operation so can reduce the user because can not make element luminous separately.Especially in green and situation that the blue light emitting device characteristics fluctuation is less, use and utilize a kind of FEEDBACK CONTROL of optical sensor can revise red light-emitting component consistently, so can obtain higher performance with big relatively characteristics fluctuation.Because no matter in the detecting operation process, light the fact of a plurality of light-emitting components simultaneously, only need a kind of light-emitting component of control correction in single detecting operation, so but simplified control circuit.Mode similar to the above embodiments, the constant light-emitting component of lighting is described as red light-emitting component in the present embodiment, but the present invention is not limited to this structure.In addition the operation of the 17 embodiment and effect and above-mentioned first embodiment's is identical.

Next, the 18 embodiment of the present invention will be described.The light supply apparatus of the 18 embodiment is identical with display device 2 with the light supply apparatus 1 of above-mentioned first embodiment with the structure of display device.Yet the method for control light source is different.In view of the foregoing, will omit the description of the 18 example structure, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 28 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 28G, wherein the transverse axis of each figure is the time, Figure 28 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 28 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 28 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 28 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 28 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 28 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 28 G has the optical sensor output result's who draws value on Z-axis.

The feature of the 18 embodiment is duplicate detection and correction operation consistently, as shown in Figure 28.Can obtain stable high performance control thus.

The demonstration of display panel about every 16ms usually refreshes.In some high-performance display devices, refresh time is the twice of normal speed, 8ms for example, but in the present embodiment, and the situation of using 16ms in description is as an example.

Liquid crystal indicator generally is classified as the maintenance display device.The maintenance display device is meant following display device, promptly wherein refreshes demonstration, will show then to remain to carry out the next one and refresh always.Opposite with the display device of the type, CRT etc. are classified as the impulse type display device.The impulse type display device is meant following display device, promptly wherein refreshes demonstration, is only showing at that moment then.CRT is that the reason of impulse type is, the fluorophor of any pixel of electron beam scanning, and only moment is launched light, and the pixel that is scanned when other pixels of electron beam irradiation is no longer luminous.It is generally acknowledged that the impulse type display device has the video visual capabilities more higher than maintenance.In addition, the liquid crystal indicator that is generally the maintenance display device has backlightly shown the impulse type performance by disconnecting at once, thereby has obtained higher video display performance.The feature of present embodiment is to take to disconnect at once operation backlight, in a flash, makes all light-emitting components luminous in the time sequencing mode when light-emitting component disconnects from being switched to, and detects and revise operation then.

Connect all light-emitting components simultaneously at the time t0 place, as shown in Figure 28.Time period from t0 to t1 is used for common display.This time period for example is made as 10ms.In the time period from t1 to t2, carry out the detecting operation of red light-emitting component, in the time period from t2 to t3, carry out the detecting operation of green luminousing element similarly, in the time period from t3 to t4, carry out the detecting operation of blue light emitting device.Identical among these detecting operations and above-mentioned first embodiment, but the time period, each all was made as 1ms.Time period from t4 to t5 is the time period that disconnects all light sources, and this time period is made as 3ms.After time t5 reaches, connect all light sources, use the result of detecting operation this moment from t1 to the t4 time period.Time period from t0 to t5 is 16ms.By repeating this time period, can in the breaking part backlight time period, carry out detection of the present invention and revise operation.

In the present embodiment, since can be in the short time period constant and repeatedly detect and revise operation, so can obtain higher performance.Especially other products that can advantageously be applied to professional equipment, high-quality LCD TV and need superior performance.Because can detect and revise operation so the user can not feel to carry out correction than the short cycle based on testing result, the identical result that can obtain by method described in the prior art with the optical sensor acquisition of less type.Yet, can revise optical sensor by the time period that disconnects light source is provided.Specifically, by detecting dark current or, can carrying out the high precision correction from the light of other elements except that light source.

In the present embodiment, described the structure that the time period that disconnects light source wherein is provided, but this not essential requirement of the present invention.The time period that disconnects light source must be provided, the time period that temporarily reduces light quantity can be provided.In other words, the essence of present embodiment be with display panel in demonstration refresh the detection of synchronously carrying out light source and revise operation.Yet refresh and the detection and the correction of light source of demonstration are operated unnecessary Seeking Truth one to one.For example, refreshing detection and the correction operation that repeatedly to carry out light source when showing, and this ratio can be set up arbitrarily at every turn.In addition, between refreshing time of time of beginning and light source detection and correction operation, demonstration can have delay.In other words, light source detection and revise the cycle of operation and refresh cycle of demonstration or refresh rate between to have fixing relation be very important, described refresh rate is the horizontal frequency of display panel.

In the present embodiment, as calibration operation, described the situation of wherein connecting and detect redness, green and blue light emitting device continuously, but the present invention is not limited to this structure, described in other embodiment, can use the method for the light-emitting component of connecting a plurality of types simultaneously.As mentioned above, present embodiment might provide the high-quality display device of imperceptible calibration operation very much.Therefore especially need the control of the imperceptible time sequencing lighting elements of user.Therefore, preferably the 17 method described in the embodiment will be described in the above, promptly the status detection result who lights whole colors by use reduces method and top the 16 the described method of embodiment of detection time, promptly changes the method combination of illumination order in each calibration.Can reduce the influence of calibration operation thus, and obtain the demonstration of better quality.In addition the operation of the 18 embodiment and effect and above-mentioned first embodiment's is identical.

Next, nineteen embodiment of the present invention will be described.The light supply apparatus of nineteen embodiment is identical with display device 26 with the light supply apparatus 16 of above-mentioned the 7th embodiment with the structure of display device.Yet the method for control light source is different.In view of the foregoing, will omit the description of the 18 example structure, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 29 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 29G, wherein the transverse axis of each figure is the time, Figure 29 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 29 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 29 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 29 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 29 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 29 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 29 G has the optical sensor output result's who draws value on Z-axis.

Especially, the feature of nineteen embodiment is to combine with the field sequence type liquid crystal indicator of above-mentioned the 7th embodiment, has increased white display image, as shown in Figure 29.Specifically, in above-mentioned the 7th embodiment, by synchronously showing that in the time sequencing mode image of being made up of red, green and blue component comes display color with fast blink redness, green and blue light source.Yet in nineteen embodiment, by synchronously showing that in the time sequencing mode image of being made up of red, green and blue component comes display color with fast blink redness, green, blueness and white light source.Like this, can reduce electric power, show the brightness that can improve display image by the image that increases white color component simultaneously.Reduced wherein to observe the look fracture phenomena of color separated.

In the situation of image that will the display white component, light source is put bright green and blue light emitting device in chronological order, uses the testing result correction light source of optical sensor this moment.This is the present embodiment notable attribute.

Time period from t1 to t2 is the cycle that shows the image of red component, and this time is made as 4ms.The image that shows red component on display panel when finishing demonstration, is connected red light-emitting component.Time period from t2 to t3 is the cycle that shows the image of green component.The image that shows green component on display panel when finishing demonstration, is connected green luminousing element.Time period from t3 to t4 is the cycle that shows the image of blue component.The image that shows blue component on display panel when finishing demonstration, is connected blue light emitting device.Each time period all is made as 4ms.In the present embodiment, do not carry out the detecting operation of light source in the time period from t1 to t4.

Next, the time period from t4 to t5 is the cycle of the image of display white.The image of display white component on display panel when finishing demonstration, is connected all light-emitting components, thereby has been produced white illumination.At this moment, by launching white illumination with time sequencing mode continuity point shiny red, green and blue light emitting device.Use optical sensor that the testing result of this emission is revised light source then, in the display operation that time t5 begins, reflected this correction.Repeat operation, thereby obtain the colored demonstration of a continuous type from t1 to the t5 time period.

In the present embodiment, form contrast, because utilize the demonstration of white color component, constantly in the short time period repeatedly detect and revise operation, so can obtain higher performance with above-mentioned the 7th embodiment.Especially other products that can advantageously be applied to professional equipment, high-quality LCD TV and need superior performance.Because can detect and revise and operate so the user can not feel, can obtain identical result, but use the optical sensor of less type by method acquisition described in the prior art to carry out correction than short circulation based on testing result.

Identical with above-mentioned the 7th embodiment, in the continuous type display device on the scene, but need not use just display color of color filter.Thereby, not only can reduce the minimizing that causes by color filter from the light of light source, also can reduce process number, thereby improve productive rate, and obtain lower cost.In addition, because compare, can use the pixel of 1/3 quantity just can obtain colored the demonstration, so improved aperture opening ratio with the situation of using color filter.As mentioned above, in the present invention,, can obtain to have the high control ability of lesser amt optical sensor by with time sequencing emission light, but because a continuation mode has reduced the flicker of light source, so application of the present invention is very potential.

In addition, in the present embodiment, in the process of display white component, light the light-emitting component of all colours simultaneously, can detect and revise operation single color and all colours.In addition, not only in white procedure for displaying, but also in other color procedure for displaying, can detect and revise operation.In addition the structure of nineteen embodiment and above-mentioned the 7th embodiment's is identical.

Next, the 20 embodiment of the present invention will be described.The light supply apparatus of the 20 embodiment is identical with display device 26 with the light supply apparatus 16 of above-mentioned the 7th embodiment with the structure of display device.It only is the method difference of control light source.In view of the foregoing, will omit the description of the 20 example structure, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 30 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 30G, wherein the transverse axis of each figure is the time, Figure 30 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 30 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 30 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 30 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 30 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 30 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 30 G has the optical sensor output result's who draws value on Z-axis.

As shown in Figure 30, the 20 embodiment relates to the method for the display panels that is used to drive above-mentioned the 7th embodiment midfield continuous type, especially is characterised in that and clearly carries out the light source calibration operation, thereby the user is clearly felt.Specifically, in the 20 embodiment, compare with above-mentioned the 7th embodiment, the light source calibration operation is different, especially be easy to make the user to feel light source detection operation, set up long section detection time thus, the user can feel and enjoy the light of light source and launch pattern.

As shown in Figure 30, the detecting operation of a proper time point place startup light source condition before time t1.At first, light red light-emitting component; Yet, be not suddenly it to be lighted, but increase light quantity gradually from off-state.

When having reached predetermined condition, carry out the operation of detection light source condition.Next, just a time point place before time t2 starts the operation that disconnects red light-emitting component, and light quantity reduces gradually.Then, increase the light quantity of green luminousing element gradually.When roughly having passed through time t2, thoroughly disconnect red light-emitting component, green luminousing element will reach predetermined state, so carry out the operation of detection light source condition.Time period from t1 to t2 was made as about 10 seconds, no matter a continuous content displayed repeats the flicker of light source.Then, blue light emitting device is carried out detecting operation similarly equally.When demonstration turns back to normally beginning of time t4 place, be used for the correction of reaction detection result's light source drive condition, realized the colored demonstration of a continuous type.Alternatively, when detecting and revising operation, the time period from t1 to t4 can repeat repeatedly.Input recovers the normal trigger pip that shows to control circuit.

The remarkable difference of present embodiment and conventional sense operation is that detecting operation is designed to attract energetically the user.For this reason, set up the long time period, the luminous pattern of light source combines ornamental light emission, and this is that detecting operation is forced necessary.Like this, can carry out stable detecting operation, and obtain high image quality.In addition, because can obtain the impression of high-decoration, so can provide visual enjoyment to the user.In addition, because clearly carry out detecting operation, can relievedly suitably calibrate.

Personal computer is to use an example of the end device of present embodiment.The personal computer operated by rotary motion has screensaver functions, burns screen to stop screen, by use present embodiment ground detecting operation concomitantly with this screen protection, can obtain the screen protection of high-decoration ground.Similarly, present embodiment can be assemblied in the other-end device that ATM (Automatic Teller Machine), vending machine or target are the users of not specific quantity, in the current situation that does not have a user, can utilize the outward appearance of high-decoration, attract potential user to improve advertising results.For this reason, the light emission pattern of correction in the light source modification operation is very important to obtain having more ornamental pattern, and for this reason, the light emission pattern that the displaying contents of use and display panel is equal to is effective.Utilization comes to turn back to normal demonstration from calibration operation from the trigger pip that screen saver operation is returned normal running.

Like this, the display device of present embodiment not only can be used in the end device that is equipped with the simple displaying function, but also can be used in the very important device of ornamental appearance.Most popular application is the phone of closing for folding in the personal terminal device, is arranged on the sub-display on the clam shell portable phone outside.

In the present embodiment, described wherein by slowly repeating the mode of three colour light source flickers, the situation that changes in the iris mode backlight.Yet this only is exemplary, and the present invention is not limited to this structure.Can realize the more pattern of high-decoration.In addition, when making light source, give ornamental outward appearance, can operate near carrying out light source detection under the condition in the use in the continuous display on the scene with short circulation flicker.Can obtain higher accuracy thus.In addition the operation of the 20 embodiment and effect and above-mentioned the 7th embodiment's is identical.

Next, the 21 embodiment of the present invention will be described.The light supply apparatus of the 21 embodiment is identical with light supply apparatus 11 with the display device 21 of above-mentioned second embodiment with the structure of display device.It only is the method difference of control light source.In view of the foregoing, will omit the description of the 21 example structure, will describe the operation of the display device of present embodiment; Promptly control the method for present embodiment light supply apparatus.Figure 31 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 31H, wherein the transverse axis of each figure is the time, Figure 31 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 31 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 31 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 31 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 31 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 31 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 31 G has the optical sensor output result's who draws value on Z-axis, Figure 31 H has the transmissivity of the transmission-type liquid crystal display panel that draws on Z-axis.

As shown in Figure 31, compare with second embodiment, the 21 embodiment is characterised in that the following time period is provided that promptly it breaks light source, thereby makes the time period of light sensors exterior light, and makes the transmissivity of display panel become higher level.Like this, can use the condition of the light sensors exterior lighting of detection light source condition, can revise the light source setting according to ambient brightness, and the sensor that is used for exterior light separately needn't be provided.

As shown in Figure 31, up to time t4, light source calibration operation also with above-mentioned second embodiment in identical.In the present embodiment, at time t4 place, extinguish all light-emitting components of forming light source.Then, for display panel becomes the high-transmission rate state, display white image for example.Therefore, exterior light transmission display panel, and by the optical plate propagation, thereby incide on the optical sensor.As a result, optical sensor can detect the outside light quantity of transmission display panel.The operation of the light source that correction begins at time t5 is with the testing result of exterior light and the testing result of light source condition before the reflection time t4.Specifically, externally the testing result of light is in the situation of smaller value, determine that environmental baseline is low bright wisp spare, and reduce the light quantity of light source, thereby the user needn't see excessively bright display screen by light.On the other hand, externally the testing result of light is in the situation of higher value, determines environmental baseline for brighter, and increases the light quantity of light source, to improve the visual capabilities to the user.

In the present embodiment,, can produce the demonstration that is suitable for service environment, the optical sensor that detects the exterior light condition needn't be provided by in the control procedure of light source and display panel, being provided for detecting the time period of exterior light.Present embodiment is especially effective in the situation of the mobile communication terminal that environment changes with the user probably.

In the present embodiment, the display white image for the transmissivity that improves display panel has been described in detecting the time period process of exterior light.Because the transmissivity of display panel generally is restricted, show so preferably on whole screen, produce white, pass display panel with increase, propagate and reach the light quantity of optical sensor by optical plate.In addition, carry out the description of exterior light detecting operation although described after the light source detection operation, the present invention is not limited to this structure, externally carries out the light source detection operation after the light detection operation.In this case, by in off-state, using the display panel of normally white, externally be easy to control display panel in the light detection operation process with high-transmission rate.In addition the operation of the 21 embodiment and effect and above-mentioned second embodiment's is identical.

Next, 22nd embodiment of the invention will be described.Figure 32 is the skeleton view that shows according to the display device of present embodiment.As shown in Figure 32, the display device 2 of the display device of the 22 embodiment and the structure of light supply apparatus and above-mentioned first embodiment and light supply apparatus 1 slightly different being, except the optical sensor 4 of detection light source light launching condition, also be provided with the optical sensor 43 that is used to detect the exterior light condition.These two kinds of optical sensors 41,43 all are formed on the transmission-type liquid crystal display panel 74, and use the thin film transistor (TFT) on the display panel to form.The optical sensor 41 that is used for light source has the photoresist layer in the face of the user.Exterior light can be stopped thus, and light can be detected by light emitted.Because because photoresist layer, the user can't see this light source light sensor 41, so it is illustrated by the broken lines in Figure 32.In general display panel, the substrate that is formed with thin film transistor (TFT) on it is towards the light source setting, and another substrate is provided with photoresist layer, is formed with the black matrix" that is used to stop the pixel boundary zone.Therefore, the photoresist layer of exterior light can be formed for stopping simultaneously, process number can be reduced with black matrix".Substrate with photoresist layer also has formation and is used to produce the colored color filter that shows thereon.Therefore, by using this color filter, the optical sensor 43 that is used to detect exterior light promptly is used for redness, green and blue sensor and is formed by three kinds of sensors.Therefore optical sensor can carry out the spectral detection of exterior light.Yet, compare with light source light sensor 41, on light source one side, do not form shading layer at sensor 43.Thereby external light sensor 43 is following structures, and promptly it is subjected to the effect of altitude of the light of light emitted.Two kinds of optical sensors 41,43 are connected to control circuit 201 by the distribution that is formed on the transmission-type liquid crystal display panel 74.In addition the structure of present embodiment and above-mentioned first embodiment's is identical.

Next, will describe the operation of the display device of the present embodiment of forming in a manner described, promptly control the method for present embodiment light supply apparatus.Figure 33 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 33H, wherein the transverse axis of each figure is the time, Figure 33 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 33 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 33 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 33 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 33 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 33 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 33 G has the light source light sensor output result's who draws value on Z-axis, Figure 33 H has the output result's of the external light sensor that draws value on Z-axis.

As shown in Figure 33, in the present embodiment, control method is based on described in the 8th embodiment of the invention described above.Specifically, provide its time period that breaks all light sources, in this time period process, the optical sensor 43 that is used for exterior light detects the exterior light condition.By its time period that breaks all light sources is provided, the optical sensor 43 that just will not be used for exterior light is arranged on the side of shading layer in the face of light source, simplifies the structure.

As shown in Figure 33, at the time t0 place, connect all types of light-emitting components simultaneously.Time period from t0 to t1 is to be used for the normal time period that shows.Next in the time period from t1 to t2, carry out the detecting operation of red light-emitting component; Similarly, in the time period from t2 to t3, carry out the detecting operation of green luminousing element; Similarly, in the time period from t3 to t4, carry out the detecting operation of blue light emitting device.Use light source light sensor 41 to carry out these detecting operations, but because optical sensor 41 has the structure that stops the exterior light influence, thus can be under the situation that not influenced by exterior light the condition of detection light source.

Time period from t4 to t5 is the time period that disconnects all light sources; In this time period process, use external light sensor 43 to detect exterior light.An example that has shown external light sensor 43 output results among Figure 33 H.Accompanying drawing has been described at three kinds of color sensors and has been formed optical sensor 43, and the output of sensor especially is set in the situation of red color filter.As mentioned above, because optical sensor 43 lacks the structure that stops from the light of light source, so sensor will be subjected to the influence of light source in the time period process from t1 to t4, but because light source disconnects in the time period process from t4 to t5, so can detect exterior light purely.In the present embodiment,, except the red light sensor, also be provided with green and blue light sensor, determine tone so exterior light can be carried out spectral separation because in order to detect the exterior light condition.

In time t5 place beginning, carry out the correction of light source, to detect the result of exterior light condition in the result that is reflected in detection light source condition in the time period process from t1 to t4, the time period process from t4 to t5.A method of reflection exterior light condition is to detect outside brightness, and when low-light level, reduces the light quantity of light source, excessive brightness perhaps when high brightness, does not increase the light quantity of light source, clearly to see demonstration so that the user can not feel.Especially, because carry out the spectral detection of exterior light in the present embodiment, thus in the warm colour environment, can suppress the blue light emitting device of light source, so that warm tone to be provided.Because people's adaptation of eye surrounding environment, thus for identical given white,, can feel that then white is little yellow if surround lighting is blue partially, and if ambient lighting is little yellow, then can feel white for blue, thereby produce uncomfortable feeling.In the present embodiment, because can adjust shade of color, so can reduce the uncomfortable of part user according to surrounding environment.Repeat the operation of time t0 to t5.

Specifically, in the present embodiment,, can revise, can obtain high ability and low cost in the mode of reflection exterior light effect by simple design.

In addition, can obtain high-precision control by the detecting operation that in the time period process from t4 to t5, carries out the exterior light condition.Commercial electric power generally has 50 to other frequency of 60Hz level, and the fluorescent light that is connected with this commercial electric power will repeat flicker with this frequency.Usually, in most of situations, the frame rate of display panel also is made as about 60Hz.This be because human eye perceives less than the limiting frequency of optical flare near 60Hz.Therefore, carry out under the situation of fluorescent illumination in the situation of present embodiment operation, the interference of two frequencies will produce new problem.For example, in consistent situation of the bright time period of the time period from t4 to t5 and fluorescent illumination flicker, obtained diverse testing result, its with this time period situation consistent with the dark time period on the contrary.Therefore, in the present embodiment, use the surging condition of external light sensor monitoring exterior light, in detecting the situation in cycle, detecting the brightest detection of exterior light of carrying out as a result the time.Like this, can determine the exterior lighting condition reliably.In addition, for the parasitic light that stops exterior lighting to produce influences each other with the detection of light source condition, externally throw light on and carry out the calibration of light source when the darkest.Can obtain the precision of higher level thus.In addition the operation of the 22 embodiment and effect and above-mentioned the 8th embodiment's is identical.

Next, 23th embodiment of the invention will be described.Figure 34 is the skeleton view that shows according to the display device of present embodiment.

As shown in Figure 34, the display device 20 of the 23 embodiment and the structure of light supply apparatus 10 and the display device 2 of above-mentioned first embodiment and remarkable different being of light supply apparatus 1, optical sensor 4 is arranged on display panel in the face of on observer's the side, rather than is facing on the side of light supply apparatus.Specifically, this design can make optical sensor 4 detect the light that passes display panel., in the present embodiment, not only can revise for this reason, as the tonal variation that causes over time in the optical plate, but also can revise over time, perhaps the tonal variation that causes by variation of temperature by display panel by light supply apparatus.

Therefore, so design optical sensor, promptly exterior light is not directly incident on the sensor.Specifically, the light entrance face of optical sensor is towards the display panel setting.In order to detect the light that passes display panel, in the frame part of display panel, light hole is set.This hole is designed to detect by the mode of passing this hole passes the display panel major part, i.e. the light of liquid crystal, polaroid etc.In order to make this hole printing opacity, preferably use the display panel of normally white.Because only transmission is acceptable from the hole of the light of light source, thus also can realize by special electrode pattern is set on the display panel respective regions, and can improve the operation of transmissivity.In addition the structure of present embodiment and above-mentioned first embodiment's is identical.

Next, will describe the operation of the display device of the present embodiment of forming in a manner described, promptly control the method for present embodiment light supply apparatus.Figure 35 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 35G, wherein the transverse axis of each figure is the time, Figure 35 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 35 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 35 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 35 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 35 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 35 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, Figure 35 G has the optical sensor output result's who draws value on Z-axis.

As shown in Figure 35, in the 23 embodiment, calibration operation is roughly similar with above-mentioned first embodiment.Especially, because the variation in the display panel is added on the output result of optical sensor, control light source so can export the result according to these.

In the present embodiment, can detect and revise the variation of the tone that shows that the variation owing to display panel causes, the similar light that available better simply design detection and user notice.In addition the operation of the 23 embodiment and effect and above-mentioned first embodiment's is identical.

Next, 24th embodiment of the invention will be described.Figure 36 is the skeleton view that shows according to the display device of present embodiment; Figure 37 is the cross-sectional view that shows as the transparent/scattering switching device of display device element.As shown in Figure 36, according to the structure of the display device 221 of the 24 embodiment and light supply apparatus 101 and display device 2 and light supply apparatus 1 different being, transparent/scattering switching device 122 is set as element according to above-mentioned first embodiment.The light that light enters from optical plate 3 was present in time course on its opposition side, transparent/scattering switching device 122 was in the state of scattered light and transmission and do not switch between the state of scattered light.The light exit surface 3b of optical plate 3 is provided with hologram pattern, to improve output direction of light on normal direction.As a result, can have light in light exit surface 3b normal direction from optical plate 3 outgoing than high directivity.Specifically, so design the light supply apparatus in the present embodiment, promptly use the scattering handoff functionality of transparent/scattering switching device, export in the following manner from the light of the high directivity of optical plate outgoing, promptly the angular region from the light of light supply apparatus output is variable.In addition, by using this light supply apparatus, display device can have the visual perspective of variation.Control circuit 201 has the function that drives and control transparent/scattering switching device 122.Optical sensor 4 is arranged on, and transparent/scattering switching device 122 is faced on the side of display panel, and detects the light that passes transparent/scattering switching device 122.

Figure 37 is the cross-sectional view that shows the transparent/scattering switching device 122 on the light exit surface that is arranged on optical plate 3.In transparent/scattering switching device 122, be set parallel to each other a pair of transparency carrier 109, each all has electrode disposed thereon 110 to the relative face of transparency carrier 109 for this, thereby covers the surface of transparency carrier 109.Between this was to transparency carrier 109, promptly clamping had PDLC (Polymer Dispersed Liquid Crystal, Polymer Dispersed Liquid Crystal) layer 111 between electrode 110.PDLC layer 111 comprises the liquid crystal molecule 111b that disperses by polymer nature 111a.For example the potpourri by exposure and curing liquid crystal material and light-cured resin forms PDLC layer 111.

In transparent/scattering switching device 122, apply voltage for PDLC layer 111 by pair of electrodes 110, can change the orientation of liquid crystal molecule 111b in the PDLC layer 111.For example, when applying electric field for the PDLC layer, the apparent refractive index of polymer nature and liquid crystal molecule is different, imports light thus and is scattered, and export light on the scattering direction.On the other hand, when applying electric field for the PDLC layer, the apparent refractive index of polymer nature and liquid crystal molecule is roughly consistent, and described layer presents pellucidity, and wherein importing light is not had the output of scattering ground.Like this, transparent/scattering switching device 122 scatterings or transmission are imported light and are outputed it to display panel.In addition the structure of present embodiment and above-mentioned first embodiment's is identical.

Next, will describe the operation of the display device of the present embodiment of as above forming, promptly control the method for present embodiment light supply apparatus.Figure 38 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 38G, wherein the transverse axis of each figure is the time, Figure 38 A have on Z-axis, draw send to the electric current of RGB-LED red element by light source driving circuit, Figure 38 B have on Z-axis, draw send to the electric current of RGB-LED green components by light source driving circuit, Figure 38 C have on Z-axis, draw send to the electric current of RGB-LED blue element by light source driving circuit, Figure 38 D has the light emissive porwer of the RGB-LED red element of drawing on Z-axis, Figure 38 E has the light emissive porwer of the RGB-LED green components of drawing on Z-axis, Figure 38 F has the light emissive porwer of the RGB-LED blue element of drawing on Z-axis, the fuzzy value of Figure 38 G has drawn transparent/scattering switching device, Figure 38 H have the optical sensor output result's who draws value on Z-axis; Especially, shown the example that has switched to wide visual angle situation from narrow visual angle situation.

Present method with the description control light supply apparatus.To describe the operation of light supply apparatus before this, promptly give the operation that the variable visual angle scope is provided from the light of light supply apparatus output.At first, will the situation of narrow angular field of view illumination be discussed.Be input to transparent/scattering switching device 122 from the light of the high directivity of optical plate 3 output.At this moment because transparent/scattering switching device 122 is in the pellucidity that applies voltage, so the light of this high directivity directly see through, and not by transparent/scattering switching device 122 scatterings.In other words, light keeps higher directivity simultaneously from transparent/scattering switching device 122 outputs.Light with higher directional distribution is input to display panel 7, applies image, and exports described light, and it does not change than high directivity.As a result, can only in narrower angular region, watch display device, under the situation at narrower visual angle, show image.

Next, the situation of wide visual angle illumination is described.Be input to transparent/scattering switching device 122 from the light of the high directivity of optical plate 3 output.At this moment, because transparent/scattering switching device 122 is in the scattering state that does not apply voltage,, the light of this high directivity distributes so by transparent/scattering switching device 122 scattering equably, becoming on wide angular field of view.In other words, light has been reduced directivity by transparent/scattering switching device 122 scatterings, becomes the light at wide angle.The light that this broad distributes is input to display panel 7, applies image, and exports the light at wide angle.As a result, can on the broad angular region, watch display device, under the situation at broad visual angle, show image.

Usually, have microstructure, as the PDLC layer and come by the index distribution of this microstructure in the element of scattered light, the scope of scattered light depends on light wavelength, and the light scattering of shorter wavelength is stronger, and the light scattering of longer wavelength is difficulty more.Specifically, be in the situation of scattering state at transparent/scattering switching device, the easier scattering of blue light, and red light is difficult to scattering, thus have the blueness of low ratio from the light of transparent/scattering switching device output, present little yellow.Like this, the tone from the light of transparent/scattering switching device output depends on transparency.

In the situation that the transparency of transparent/scattering switching device has been switched, must also adjust the light quantity of light source.This be because, in the state of wide visual angle, must scattering on various directions from the light of the high directivity of optical plate output.Specifically, if identical with the light quantity of light source in the state of wide visual angle at narrow visual angle state, the front brightness in the state of then wide visual angle will be lower than the front brightness in the state of narrow visual angle.Simultaneously, for being located at the main user that the place ahead makes progress, preferably brightness does not change between demonstration of narrow visual angle and the demonstration of wide visual angle.Therefore, for fear of showing the decline that switches to front brightness the procedure for displaying of wide visual angle, must increase the light quantity of light source, thereby not reduce front brightness from narrow visual angle.

In addition, when leniently the visual angle shows that switching to narrow visual angle shows, for fear of feeling that front brightness increases, and reduce the light quantity of light source.Like this, between demonstration of narrow visual angle and the demonstration of wide visual angle, switch and not only need between transparent and scattering state, switch transparent/scattering switching device, but also the light quantity that needs the while toggle lights to launch.Yet when the light quantity of toggle lights emission, the characteristic of light source can change, and the tone of the light of light emitted also can change.

Like this, when switching between demonstration of narrow visual angle and the demonstration of wide visual angle, the spectrum that passes transparent/scattering switching device can change, and the spectrum of light emitted also can change.Therefore, in the present embodiment, be very important according to present embodiment control light supply apparatus.

As shown in Figure 38, before time t1, keep narrow visual angle state, transparent/scattering switching device has lower fuzzy value.In other words, transparent/scattering switching device is in the pellucidity.At this moment, the light-emitting component of composition light source is luminous under the condition of appointment.When at time t1 place narrow visual angle state being switched to wide visual angle state subsequently, revise drive condition, thereby it is higher fuzzy that transparent/scattering switching device is shown now, and present scattering state.Carry out the detecting operation of the light-emitting component of each color afterwards.Because on the light exit surface of optical sensor is arranged on transparent/scattering switching device, so utilize time-sharing detecting method of the present invention also can detect by the fuzzy spectrum change that causes that waits.Concrete detecting operation, i.e. similar among detecting operation in the time period process from t1 to t4 and above-mentioned first embodiment will the descriptions thereof are omitted.Since time t4 place, use described testing result and can set up the wide visual angle state that carries out tonal correction.When switching to, visual angle state leniently also carries out similar operation in the state of narrow visual angle.

In the present embodiment, have the transparent/scattering switching device of the changeable degree of scattering, can obtain to have the display device of switchable viewing angle, thereby obtain light supply apparatus or display panel with changeable light angle scope by use.By synchronously carrying out the calibration operation of light supply apparatus, can detect and revise the demonstration tone in switching the angular field of view process with the switching of transparent/scattering switching device.

In the present embodiment, wherein three colors have been described, the situation of redness, blueness and green luminousing element.Yet the present invention is not limited to this structure, instead, and white BY-LED and the blue BY-LED of the tenth embodiment of use capable of being combined.

Transparent/scattering the switching device that uses among the present invention is not limited to the PDLC layer, can use any element that can switch between pellucidity and scattering state.Example comprises element that uses polymer network liquid crystal (PNLC) and the element that uses dynamic scattering (DS).In addition, can use not have the layer that presents scattering state when applying voltage, when applying voltage, presents pellucidity, as above-mentioned PDLC layer.Like this, in the state of scatter incident light, transparent/scattering switching device will can not consume electric power, thereby can give back light with the distributing electric power of respective amount, the brightness that is easy to improve light supply apparatus when in scattering state.Yet using following PDLC layer also is acceptable, promptly presents pellucidity when not applying voltage, presents scattering state when applying voltage.By when applying voltage, making this PDLC layer by exposure curing.In portable information terminal, this has eliminated in the frequent narrow field-of-view mode that uses and has applied necessity of voltage for the PDLC layer, thereby has suppressed power consumption.Can use the liquid crystal molecule as the PDLC layer such as cholesteryl liquid crystal, ferroelectric liquid crystals.These liquid crystal have memory, even promptly after turn-off current, liquid crystal also can continue to keep by applying the orientation that electric current produces.Can reduce power consumption by using this PDLC layer.

Although used various transparent/the scattering switching device, general high speed toggle lights.Therefore preferably after transparent/scattering switching device switches, carry out and the relevant calibration operation of switching visual angle state, thereby can obtain more accurate calibration.

In addition, calibration operation of the present invention can be used for being suppressed at the tonal variation phenomenon that causes by in transparent/scattering switching device control visual angle process, but the present invention is not limited to this embodiment.

With disclose among above-mentioned the 4th embodiment the same, can use the thin film transistor (TFT) that is formed on the display panel to form optical sensor in the present embodiment.Because directly over display panel is positioned at transparent/scattering switching device, thus advantageously carry out this design, and can reduce thickness, and can reduce cost by reducing component count.

In this case, preferably on observer's one side of optical sensor, form shading layer, to stop incidence of external light to optical sensor.Especially form in the frame part at display panel in the situation of optical sensor, this can be by forming optical sensor on the substrate of light source in two substrates forming display panel, and realize forming shading layer on observer's substrate.Be formed on and face the shading layer on observer's the substrate and stop that the black matrix" in pixel boundary zone forms simultaneously, thereby do not need extra operation.

Present embodiment also is provided with beam direction and adjusts element, is used for further improving the direction of light that is input to display panel.In being in the situation of pellucidity, transparent/scattering switching device takes this scheme.This beam direction is adjusted an example of element by the transparent region of the transmitted light that is provided with in an alternating manner and the window shutter that light absorbing absorption region is formed on the direction that is parallel to the surface.For example, by this window shutter is set, can reduce the light on wide angular direction, propagated on the light exit surface of optical plate, thereby can in the procedure for displaying of narrow visual angle, suppress light leak in an inclined direction, and improve the effect that stops other people to steal a glance at.In addition, detect the light that passes window shutter, also can revise by window shutter and change in time and the tonal variation that causes by optical sensor is set.In addition the operation of the 24 embodiment and effect and above-mentioned first embodiment's is identical.

Next, the 25 embodiment of the present invention will be described.Figure 39 is the skeleton view that shows according to the display device of present embodiment, and Figure 40 is the top view of position that shows light source, optical sensor and the diffusion sheet of display device element.As shown in Figure 39, according to the structure of the display device 212 of the 25 embodiment and light supply apparatus 102 and display device 2 and light supply apparatus 1 remarkable different being, use the light source of full run-down type according to above-mentioned first embodiment.Specifically, in above-mentioned first embodiment, light source is not set, and in the present embodiment, light source is arranged on the rear surface of viewing area on the rear surface of display panel viewing area.Thereby, replace optical plate 3 and use diffusion sheet 31.Diffusion sheet 31 has following effects, promptly presents uniform state by the light that is arranged on light source 51 emissions on the rear surface on display surface.Optical sensor 4 is provided with near light source 51.Light source 51 and optical sensor 4 each all with one group of setting.In every group, optical sensor can mainly detect the state with the paired light source of this sensor.This is because some light beams of exporting from light source are reflected by diffusion sheet, and is input to the described right optical sensor of composition.Light source is by three colors, the top view type RGB-LED that red, green and blue light-emitting component is formed.

Figure 40 is a top view, promptly presents to observer's view, has shown the position of light source, optical sensor and the diffusion sheet of display device element.As shown in Figure 40, be provided with six groups altogether, promptly on the horizontal direction two groups, on the vertical direction three groups, all form for every group by light source 51 and optical sensor 4 in the arranged mode.In the present embodiment, be arranged on upper left one group and be defined as being positioned at row 1, row 1; One group that is positioned at the bottom right is defined as being positioned at row 3, row 2.This setting is such, can scan by first row, second row and the third line in order.The light source of every row and optical sensor group are designed to and are similar to aforementioned the 8th embodiment and operate.In addition the structure of present embodiment and above-mentioned first embodiment's is identical.

Next, will describe the operation of the display device of the present embodiment of as above forming, promptly control the method for present embodiment light supply apparatus.Figure 41 A is the timing diagram of demonstration according to the tonal correction operation of the light supply apparatus of present embodiment to 41C, wherein the transverse axis of each figure is the time, Figure 41 A have on Z-axis, draw be positioned at row 1, the output valve of the optical sensor at row 1 place, Figure 41 B have on Z-axis, draw be positioned at row 2, the output valve of the optical sensor at row 1 place, Figure 41 C have on Z-axis, draw be positioned at row 3, the output valve of the optical sensor at row 1 place.

As shown in Figure 41, the light source of every row/optical sensor group is all to detect and to revise operation with aforementioned the 8th mode that embodiment is identical.Operate with the hysteresis that equals 1/3 cycle of detecting operation every provisional capital.Specifically, in case the group of first row is connected at the time t0 place, then the group of second row is just connected at the time t1 place in 1/3 cycle of hysteresis.Then, the group of the third line is connected at the time t2 place in 1/3 cycle of hysteresis.Like this, can carry out calibration operation separately to every row.With the scanning of predetermined timing with the scan-synchronized ground driving light source of display panel horizontal direction.

In the present embodiment, but use the optical sensor of full run-down type and light source scanning light source and comparable before described the 8th embodiment improve picture quality to a greater degree.This partly disconnects the comparable method that once disconnects whole screen of screen and makes the user still less notice screen flicker because of as putting into practice in the present embodiment.On the other hand, because introduced black state, so do not lose the movement display ability.In addition, can use the full run-down type light source of high performance type, therefore can obtain the display screen of high brightness.In addition the operation of the 25 embodiment and effect and above-mentioned first embodiment's is identical.

Although can carry out embodiment described here separately, but also carry out to appropriate combination.Specifically, can take out the main points of each embodiment and combination in a suitable manner, perhaps according to a plurality of calibration stepss that disclose among condition installation and the switching embodiment.

The present invention can be advantageously used for the display device in for example mobile phone, PDA, game machine, digital camera, video camera, video player and other mobile terminal apparatus; Or as the display device in the end device of for example notebook personal computer, ATM (Automatic Teller Machine) and vending machine.

Claims

1. light supply apparatus comprises:

Have different emission spectrum and separately controllable two or more light sources;

Optical sensor is used to detect the light quantity by light emitted; With

Controller is used for driving and the control light source by the result who uses optical sensor, wherein

Described controller is controlled described two or more light source, thereby luminous in the time sequencing mode, and according to the light that time sequencing is launched, exports the light quantity of controlling light emitted based on the order that optical sensor produces.

2. light supply apparatus according to claim 1, wherein this photodetector has the light-receiving wavelength coverage corresponding to two or more at least emission wavelength scopes of described light source.

3. light supply apparatus according to claim 1 wherein uses to be detected with the time period of controlling by the light quantity of light emitted with the light of time sequencing emission by light source and separates as the time period of lighting means with the light that wherein uses light emitted.

4. the luminous time periods are included in time period of the light quantity that is used for detecting and control light emitted simultaneously for light supply apparatus according to claim 3, wherein said two or more light sources.

5. light supply apparatus according to claim 3 wherein forms a constant time cycle by time period of the light quantity that is used to detect and control light emitted with by the light that wherein uses light emitted as time period of lighting means.

6. light supply apparatus according to claim 5 is wherein in time period of the light quantity that is used to detect and control light emitted and wherein use the light of light emitted to comprise the time period that is used to reduce the light source light quantity between the time period as lighting means.

7. light supply apparatus according to claim 3 wherein begins to be used to detect and control time period of the light quantity of light emitted by the external signal that is input to controller.

8. light supply apparatus according to claim 1, wherein

Be provided for detecting the parts of external signal; And

The testing result that use is obtained by described parts is controlled the light quantity of light emitted.

9. display device comprises:

Light supply apparatus according to claim 1; With

Transluscent display panel is used for the light of transmission from described light supply apparatus emission, thus image is added on the light.

10. display device comprises:

Light supply apparatus according to claim 5; With

Transluscent display panel is used for the light of transmission from described light supply apparatus emission, thus image is added on the light, wherein

Relevant with the time cycle that forms as time period of lighting means by the light that wherein uses light emitted by being used to detect with the refresh rate of transluscent display panel with time period of the light quantity of controlling light emitted.

11. a display device comprises:

Light supply apparatus according to claim 7; With

12. display device according to claim 11 wherein reduces the transmissivity of transluscent display panel at least in the time period of the light quantity that is used for detecting described light supply apparatus emission.

13. display device according to claim 9, wherein display panel is the display panel of a continuous mode.

14. an end device comprises display device according to claim 9.

15. end device according to claim 14, wherein said end device are portable phone, personal information terminal, game console, digital camera, video camera, video player, notebook personal computer, ATM (Automatic Teller Machine) or vending machine.

16. an end device comprises display device according to claim 11, wherein

When changing, the demonstration of display device sends instruction to controller according to external signal; With

According to this command detection and control the light quantity of light emitted.

17. comprising, a control method that is used for light supply apparatus, this light supply apparatus have different emission spectrum and separately controllable two or more light sources; Photodetector is used to detect the light quantity by light emitted; And controller, be used for driving and the control light source, wherein by the result who uses photodetector to obtain

Described controller is controlled described two or more light source, thereby luminous in the time sequencing mode, and according to the light that time sequencing is launched, exports the light quantity of controlling light emitted based on the order that photodetector produces.

18. one kind is used for method for controlling display device, this display device comprises having different emission spectrum and separately controllable two or more light sources; Photodetector is used to detect the light quantity by light emitted; Controller is used for driving and the control light source by the result who uses photodetector to obtain; And transluscent display panel, be used for the light of transmission from described two or more light emitted, thus image is added on the light, wherein

Described controller is controlled described two or more light source, thereby luminous in the time sequencing mode;

According to the light of time sequencing emission, based on the order output that photodetector produces, the time period that is used to control the light quantity of light emitted uses the light of light emitted to separate as the time period of lighting means with being used to; And

This have formed a constant time cycle two time periods, and relevant with the refresh rate of transluscent display panel.

19. one kind is used for method for controlling display device, this display device comprises having different emission spectrum and separately controllable two or more light sources; Photodetector is used to detect the light quantity by light emitted; Controller is used for driving and the control light source by the result who uses photodetector to obtain; And transluscent display panel, be used for the light of transmission from described two or more light emitted, thus image is added on the light, wherein

Described controller is controlled described two or more light source, thereby luminous in the time sequencing mode, and according to the light that time sequencing is launched, exports the light quantity of controlling light emitted based on the order that photodetector produces; And

In the radiative process of time sequencing, reduce the transmissivity of transluscent display panel.

20. comprising, a control method that is used for end device, this end device have different emission spectrum and separately controllable two or more light sources; Photodetector is used to detect the light quantity by light emitted; Controller is used for driving and the control light source by the result who uses photodetector to obtain; And transluscent display panel, be used for the light of transmission from described two or more light emitted, thus image is added on the light, wherein

Use the light of light emitted to separate with the following time period as the time period of lighting means, in the described time period, controller is controlled described two or more source emissioning light in the time sequencing mode, and, export the light quantity of controlling light emitted based on the order that photodetector produces according to the light that time sequencing is launched;

Begin to be used to detect and control the time period of the light quantity of light emitted by the external signal that is input to controller;

When changing, the demonstration of end device sends instruction to controller according to external signal; And

Produce the time period of the light quantity that is used to detect and control light emitted according to this instruction.