JP2005070132A - Display unit - Google Patents

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Publication number
JP2005070132A
JP2005070132A JP2003209033A JP2003209033A JP2005070132A JP 2005070132 A JP2005070132 A JP 2005070132A JP 2003209033 A JP2003209033 A JP 2003209033A JP 2003209033 A JP2003209033 A JP 2003209033A JP 2005070132 A JP2005070132 A JP 2005070132A
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JP
Japan
Prior art keywords
light
transparent substrate
display device
green
color filter
Prior art date
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Pending
Application number
JP2003209033A
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Japanese (ja)
Inventor
Takashi Akiyama
貴 秋山
Original Assignee
Citizen Watch Co Ltd
シチズン時計株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Watch Co Ltd, シチズン時計株式会社 filed Critical Citizen Watch Co Ltd
Priority to JP2003209033A priority Critical patent/JP2005070132A/en
Publication of JP2005070132A publication Critical patent/JP2005070132A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein the quantity itself of light incident on a display cell cannot be detected accurately, since an illuminance detection sensor directly detects circumferential illuminance, without depending on the light itself incident on the display cell. <P>SOLUTION: A display unit has the display cell constituted by charging an electrooptical conversion member between a couple of substrates, at least one of which has a color filter while the other substrates is a transparent substrate, wherein a photodetection part of the illuminance detection sensor is arranged opposite to a surface part of at least the former transparent substrate and a light wavelength selecting means is arranged nearby the illuminance detection sensor. Further, the wavelength selecting means is formed of the same member as that of the color filter. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operation state of devices such as a mobile phone, a car navigation system, and a computer display device, and a display device for displaying information from these devices.
[0002]
[Prior art]
In the conventional display device, EL (electro-cleminescence) or liquid crystal is used as an electro-optic conversion member. If these are used in the present invention, the effect of the present invention is the same as in the embodiment of the present invention. can get.
Therefore, in the following description, a liquid crystal device having a configuration in which a liquid crystal material is sealed between two substrates facing each other with a gap between them is used. As a liquid crystal display device (liquid crystal unit), there is a configuration in which an illuminance detection sensor 72 is arranged on a liquid crystal frame 71 holding a liquid crystal cell 70 as shown in FIG. In this display device (liquid crystal unit), the illuminance detection sensor 72 directly detects the ambient illuminance, and adjusts the power supplied to the white semiconductor light emitting device 73 in accordance with the illuminance (patent). Reference 1).
[0003]
[Patent Document 1]
JP2003-21821A.
[0004]
Moreover, a backlight can also be comprised with the light source part which consists of LED of red, green, and blue, for example, and the light guide member which has these light source parts in an edge part.
[0005]
[Problems to be solved by the invention]
However, in the conventional liquid crystal display device (liquid crystal unit) of Patent Document 1, the illuminance detection sensor 72 is arranged on the liquid crystal cell 70 side, and directly regardless of the light incident on the liquid crystal cell 70. Since the ambient illuminance is detected, the amount of light incident on the liquid crystal cell 70 cannot be measured accurately.
[0006]
Further, when measuring the illuminance of visible light with the illuminance detection sensor, the sensitivity of the infrared component in the light is high, and therefore the wrong illuminance may be measured if the infrared ray is strong even in the dark. For this purpose, a special detection color filter that transmits only visible light is created, and this special detection color filter is used to transmit only visible light. There was a problem that the filter was expensive in terms of cost.
[0007]
Further, the backlight is composed of, for example, a light source unit composed of red, green, and blue LEDs and a light guide member that has these light source units at the ends, and these red, green, and blue LEDs are controlled by a control circuit. , The forward voltage of the LED varies for each color of the backlight (the amount of light emitted by the LED depends on this voltage), the color of the illumination light emitted from the backlight changes, and the white balance is adjusted. However, there is a problem that even if it can be adjusted, the temperature changes with time.
[0008]
The present invention has been made paying attention to the above-mentioned problems. The first object of the present invention is that the illuminance detection sensor can accurately detect the amount of light incident on the liquid crystal cell. Or it is providing the display apparatus which can measure the illumination intensity of visible light reliably.
[0009]
A second object of the present invention is to provide a display device in which the white balance of a full-color image is always properly maintained, and accordingly the image quality is appropriately maintained.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a display having a display cell in which an electro-optic conversion member is sealed between a pair of substrates in which at least one substrate has a color filter and at least one substrate is a transparent substrate. The apparatus is characterized in that a light receiving portion of an illuminance detection sensor is arranged to face at least one surface portion of the transparent substrate, and light wavelength selection means is arranged in the vicinity of the illuminance detection sensor.
Further, the wavelength selection means is made of the same member as the color filter.
Further, the surface portion is a side surface of the transparent substrate, and the wavelength selection means is disposed between the illuminance detection sensor and the side surface.
Further, the surface portion is a flat portion of the transparent substrate, and the wavelength selection means is disposed between the illuminance detection sensor and the flat portion.
Further, the substrate located on the side opposite to the viewing side is provided with a member having a reflection function.
[0011]
The display device includes a display cell having a configuration in which an electro-optic conversion member is sealed with a sealing material between a pair of transparent substrates, at least one of which is a transparent substrate, and is incident on at least one transparent substrate. And a color filter for detection that converts the external light propagated through the transparent substrate into monochromatic light and an illuminance detection sensor that detects the monochromatic light.
Further, the display cell is provided with color filters for displaying red, green, and blue, and the detection color filter is at least the same member as any one of the color filters for display. It is characterized by.
[0012]
In addition, a display cell having an electro-optic conversion member sealed with a sealant between a pair of transparent substrates, at least one of which is a transparent substrate, has a backlight disposed on the back side of the display cell. A display device having a backlight luminance control means for controlling the luminance of the backlight, wherein the external light that has entered the at least one transparent substrate and propagated through the transparent substrate is spectrally separated into red, green, and blue The wavelength selecting means for obtaining the monochromatic light, the illuminance detection sensors for detecting these monochromatic lights independently of each other, and the luminance of the backlight based on the amount of received light detected by these illuminance detection sensors It has a backlight luminance control means.
Further, the backlight includes a light source unit having red, green, and blue light emitting diodes (LEDs) and a light guide member disposed on a side of the light source unit.
The illuminance detection sensor and the backlight luminance control means independent of each other are integrally formed on an IC chip, and the IC chip is disposed on at least one surface of the transparent substrate, and further on the light receiving portion of the illuminance detection sensor. The wavelength selection means is arranged to face each other.
Further, the wavelength selection means comprising red, green and blue color filters for detection is made of the same member as each of the red, green and blue color filters of the display cell.
[0013]
Further, in a display device having a display cell in which an electro-optic conversion member is sealed between a pair of hexahedral substrates, an illuminance detection sensor is disposed on a surface portion of the transparent substrate, and in the vicinity of the illuminance detection sensor. The light wavelength selecting means is arranged on another surface portion orthogonal to the surface portion of the transparent substrate.
[0014]
[Action]
External light incident from the front of the display cell propagates through the inside of at least one transparent substrate while being repeatedly reflected, and the illuminance detection sensor receives the external light emitted from the transparent substrate. Since the amount of incident light and the amount of light propagating through the transparent substrate are substantially proportional, the amount of light incident on the display cell can be accurately detected. Moreover, by detecting infrared light with a color filter for detection and detecting monochromatic light (for example, green light), a detection signal proportional to the illuminance of visible light can be accurately measured, and the cost can be reduced. Can do.
[0015]
Since the detection color filter having the same configuration as the color filter is used without using a special filter that transmits only visible light, the cost of the display device can be reduced.
[0016]
When the white balance of the illumination light fluctuates, the light amount balance (ratio of light amounts) in each pixel also fluctuates, but the variation is detected by comparing the detection results of the illuminance detection sensor by the backlight luminance control means, and the liquid crystal cell It is compensated by controlling the drive signal. Thereby, the white balance of the full-color image is maintained in an appropriate state.
[0017]
For example, the light source drive control device, which is an example of the backlight luminance control means, can be driven within the rating of the light emitting diode LED while preventing the application of overcurrent to the red, green and blue light emitting diode LEDs, thereby improving the reliability.
[0018]
The light source drive control device, which is an example of the backlight luminance control means, lights each red, green and blue light emitting diode LED in real time so that the color of the red, green and blue light emitting diode LED does not change. Can be controlled. For this reason, the white balance of the illumination light is adjusted, and the white balance of the full-color image is always properly maintained, and accordingly the image quality is appropriately maintained.
[0019]
Since the light reception by the illuminance detection sensor and the control by the backlight luminance control means are completed in the liquid crystal cell, accurate control can be performed, and miniaturization is possible.
[0020]
Since the detection color filter having the same configuration as the color filter is used without using a special filter that transmits only visible light, the cost of the display device can be reduced.
[0021]
The external light incident from the front of the liquid crystal cell is dispersed with red, green, and blue detection color filters to form red, green, and blue monochromatic light, and these monochromatic lights are incident on the light receiving portion of the illuminance detection sensor. In addition, each illuminance detection sensor detects red light, green light, and blue light of external light, and outputs a detection signal corresponding to the amount of received light. In addition, the surrounding color can be measured.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0023]
(First embodiment)
A first embodiment of a display device according to the present invention is shown in FIGS.
[0024]
The display device of the present invention includes a liquid crystal cell 1 as an image display unit, a backlight 2 disposed behind the liquid crystal cell 1, a drive circuit 3 for driving a liquid crystal layer 11 of the liquid crystal cell 1, and a backlight. And a backlight control device 4 which is a backlight luminance control means for controlling the luminance of the light 2.
[0025]
In FIG. 3, the liquid crystal cell 1 includes a transparent substrate 5, 6 having a pair of hexahedral circles on the front side, that is, the viewing side and the back side viewed by a viewer, which are joined to each other via a frame-shaped sealing material 11 a. Transparent electrodes 7 and 8 are provided on the inner surfaces of the transparent substrates 5 and 6 to form a plurality of pixel regions by regions facing each other. The transparent substrate 6 on the back side extends from the transparent substrate 5 on the front side, and the length dimension in the longitudinal direction is increased. An end side portion of the transparent substrate 6 on the back surface that extends from the end side of the transparent substrate 5 on the front surface side is formed in the component mounting portion 6A.
Liquid crystal as an electro-optic conversion member is sealed in the frame-shaped sealing material 11a.
[0026]
A reflective layer or scattering reflective layer 9 and a color filter 10 are mounted on the inner surface of the transparent substrate 6 on the back side, and a liquid crystal is formed in a region surrounded by a sealing material 11 a between the pair of transparent substrates 5 and 6. Layer 11 is provided. The color filter 10 is a color filter of three colors, for example, red, green, and blue, corresponding to each of the plurality of pixel regions, and the electrode 8 described above is formed on the color filter 10.
Further, when a reflecting member is disposed on the outer surface side of the rear transparent substrate 6 which is the substrate located on the side opposite to the viewing side, the light propagates through the rear transparent substrate 6 and the front transparent Since the reflected light is also returned to the substrate, the light detection amount of the light receiving element 12 which is an illuminance detection sensor is increased, the light detection sensitivity is improved, and the reliability of the detection signal is improved. At this time, in addition to the reflecting member made of aluminum material or chrome chrome material, a member (for example, air) having a large difference in refractive index from the material of the substrate is disposed as a member corresponding to the reflecting member, thereby providing a reflecting function. You may get.
[0027]
In the case of a display device having the backlight 2 below the reflective layer 9 as in the configuration of FIG. 3, a transflective reflective layer or dielectric multilayer film having a hole in the reflective layer is used as the reflective layer 9. It is necessary to make a transflective reflective layer. When the backlight 2 is not used, the reflective layer itself may be used.
That is, the present invention can be used for transmissive, transflective, and transmissive display devices, and the effects of the present invention can be obtained.
[0028]
In this liquid crystal cell (for example, a passive matrix liquid crystal cell) 1, a plurality of electrodes 8 provided on the inner surface of the transparent substrate 6 on the back side are formed in parallel with each other along the row direction. The electrodes 7 provided on the inner surface of the transparent substrate 5 on the front side which is the scanning electrode, the viewer side, and the viewer side are a plurality of signal electrodes formed in parallel to each other along the column direction. . A front-side polarizing plate 23 is disposed on the outer surface of the front-side transparent substrate 5, and a rear-side polarizing plate 24 is disposed on the outer surface of the rear-side transparent substrate 6. In the first embodiment of the present invention, an XY matrix passive liquid crystal display device has been described. However, an active liquid crystal display device and a light-emitting display device may be used.
[0029]
As shown in FIG. 3, a detection window portion 15 is provided on the end surface portion 5a of the transparent substrate 5 on the front side (viewing side). The detection window portion 15 has a detection color as a green wavelength selection means. A filter 16 is attached. The green color filter for detection 16 uses the same member as the green color filter in the color filter 10 and transmits only visible light.
A color filter 16 for detection, which is a light wavelength selection means, is disposed on the side of the transparent substrate 5 on the front side, which is the substrate on the viewing side, which is in the vicinity of the illuminance detection sensor.
At this time, in the description of FIG. 3, the back side substrate 6 and the front side substrate 5 are transparent substrates, but only a substrate that is required to transmit light may be a transparent substrate. For example, the front substrate may be a transparent substrate, and the rear substrate may be a transparent substrate or an opaque substrate. Under such conditions, the present invention can be applied to a display device using an opaque substrate.
In this transparent substrate, when one surface of the transparent substrate is opaque (light reflection or light blocking), the substrate can transmit light through the substrate, so that the propagation light in the substrate of the present invention is detected by the illuminance detection sensor. it can.
[0030]
The amount of light detected by the illuminance detection sensor needs to be proportional to the illuminance. On the other hand, since the illuminance is a value including the visibility characteristic, the influence of the green (G) component is larger than that of red (R) and blue (B). Therefore, by using a green color filter as the detection color filter 16, a detection signal proportional to the illuminance can be obtained accurately.
[0031]
Further, the component mounting portion 6A of the transparent substrate 6 on the back side is opposed to the light receiving portion 12a side, and is a light receiving element that is an illuminance detection sensor (that is, an element that generates a current corresponding to the amount of irradiated light). For example, a photo transistor or a photo diode 12 and a backlight control device 4 are mounted. The light receiving portion 12a and the detection window portion 15 of the light receiving element 12 are made of a transparent resin (epoxy resin). And an adhesive member 13 made of an acrylic resin or the like).
[0032]
Further, the component mounting portion 6A, which is an extended portion formed by extending the transparent substrate 6 on the back side from the transparent substrate 5 on the front side, has a drive circuit 3 constituted by a drive IC as shown in FIG. A flexible printed wiring board (FPC) 14 serving as an interface of the transparent substrates 5 and 6, that is, an external connection circuit connected to a circuit outside the liquid crystal cell 1 is mounted on each of the transparent printed circuits 5 and 6. A lead wiring portion 15 that bypasses the drive circuit 3 is formed at the end portion of 14, and the light receiving element 12 is connected to the lead wiring portion 15. The light receiving element 12 may be connected to the wiring on the component mounting portion 6A without using the lead wiring portion 15, and this wiring may be connected to the flexible printed wiring board (FPC) 14, and a driving IC (driving circuit) may be connected. You may connect with the flexible printed wiring board (FPC) 14 via.
[0033]
Next, the operation of the display device configured as described above will be described.
[0034]
When the liquid crystal cell 1 is normally black, when the liquid crystal molecules of the liquid crystal layer 11 are in the initial alignment state, the external light F is transmitted from the polarizing plate 23 on the front side of the liquid crystal cell 1 as shown by a dotted line in FIG. Incident light is transmitted through the transparent substrate 5 on the front side and the liquid crystal layer 11, enters the scattering reflection layer 9, and is reflected by the scattering reflection layer 9. Then, the light reflected by the scattering reflection layer 9 passes through the liquid crystal layer 11 and the transparent substrate 5 on the front side in order and does not exit from the polarizing plate 23 on the front side. Between 7 and 8, the pixel region (pixel region in which the liquid crystal molecules are in the initial alignment state) to which the OFF voltage is applied under the control of the drive circuit 3 is darkly displayed.
[0035]
Further, an ON voltage is applied between the electrodes 7 and 8 under the control of the drive circuit 3, and the light enters from the polarizing plate 23 on the front side of the liquid crystal cell 1 and passes through the transparent substrate 5 and the liquid crystal layer 11 on the front side. Then, the light incident on the scattering reflection layer 9 is reflected by the scattering reflection layer 9 and is emitted through the liquid crystal layer 11, the transparent substrate 5, and the polarizing plate 23 on the front side to display brightly.
[0036]
Here, a part of the external light F incident from the front of the liquid crystal cell 1 is reflected at the interface between the transparent substrate 5 on the front side and the electrode 7 as shown by a solid line in FIG. 5, and is reflected at the interface D between the transparent substrate 5 and the polarizing plate 23, and is reflected at the interface C between the electrode 7 and the liquid crystal layer 11 and passes through the electrode 7, the transparent substrate 5, and the polarizing plate 23. Thus, the light is reflected at the interface between the polarizing plate 23 and the air layer.
[0037]
Further, a part of the external light F passes through the front transparent substrate 5 and the liquid crystal layer 11 and is reflected by the interface between the liquid crystal layer 11 and the color filter 10, and also by the scattering reflection layer 9 (g). Reflected. In this way, the reflected light is reflected by the scattering reflection layer 9 (g) to each interface b, c, d, e, and this detection is repeated to propagate the inside of the transparent substrate 5 on the front side, thereby detecting the window portion. 15 is emitted.
[0038]
In this case, the emitted light is split by the green detection color filter 16 provided in the detection window portion 15 to become green monochromatic light, passes through the adhesive member 13, and enters the light receiving portion 12 a of the light receiving element 12. Therefore, the light receiving element 12 detects green monochromatic light in the external light F and outputs a detection signal corresponding to the amount of light received.
[0039]
As described above, the amount of light detected by the illuminance detection sensor needs to be proportional to the illuminance. On the other hand, since the illuminance is a value including the visibility characteristic, the influence of the green (G) component is larger than that of red (R) and blue (B). Therefore, by using a green color filter as the detection color filter 16, a detection signal proportional to the illuminance can be obtained accurately.
[0040]
That is, since the green monochromatic light in the external light F is the light that matches the visual characteristics most in the visible light (the visual sensitivity is the highest), the green light is detected to detect the visible light. Illuminance can be measured reliably.
[0041]
According to the first embodiment of the present invention described above, a part of the external light F incident from the front of the liquid crystal cell 1 propagates through the front side transparent substrate 5 while repeating reflection. The external light emitted to the detection window portion 15 of the end surface portion 5a of the transparent substrate 5 on the front surface side is split by the green detection color filter 16 to become green monochromatic light. The green monochromatic light is received by the light receiving element 12. In order to receive light, the amount of light incident on the liquid crystal cell 1 and the amount of light propagating through the transparent substrate 5 are approximately proportional, so that not only can the amount of light incident on the liquid crystal cell 1 be accurately detected, Since the green light of the external light F is the light that best matches the visual characteristics of visible light (the highest visual sensitivity), the detection of this green light ensures the illuminance of visible light. Can be measured.
[0042]
In addition, since the same green color filter as the color filter 10 is used for the green color filter 16 for detection without using a special filter that transmits only visible light, the cost of the display device can be reduced. .
[0043]
In the first embodiment of the present invention described above, the green color filter 16 for detection is used as the color filter for detection. Instead of the color filter 16 for green color detection, red and blue color filters for detection are used. May be used.
[0044]
Further, by arranging the color filters for detection of the respective colors of red, green, and blue on the front surface of the light receiving element 12 and receiving the light of each color, more accurate illuminance data can be obtained. For example, when the overall illuminance is green + red + blue = 100%, since only green is 50%, more accurate illuminance data can be obtained by detecting green, red, and blue.
[0045]
(Second Embodiment)
A second embodiment of the display device according to the present invention is shown in FIGS.
[0046]
This display device includes a liquid crystal cell 1-1, a backlight 32 disposed behind the liquid crystal cell 1-1, a drive circuit 33 for driving the liquid crystal layer 11 of the liquid crystal cell 1-1, and light detection. Unit 34 and a control unit 40 which is a backlight luminance control means. This control unit 40 includes a light source drive control device 35 for controlling the light source unit 38 of the backlight 32 as shown in FIG. And a backlight control circuit 36 that outputs a control signal S4 to the light source drive control device 35 based on the detection signals S1, S2, and S3 detected by the light detection unit 34.
[0047]
As shown in FIG. 4, the liquid crystal cell 1-1 has three detection window portions 15-1, 15-2, and 15-3 provided on the end surface portion 5 a of the transparent substrate 5 on the front side. -1 is provided with a red detection color filter 16R, the detection window portion 15-2 is provided with a green detection color filter 16G, and the detection window portion 15-3 is provided with a blue detection color filter. 16B is attached. These red, green, and blue detection color filters 16R, 16G, and 16B are the same as the green, red, and blue color filters in the color filter 10.
[0048]
The component mounting portion 6A of the transparent substrate 6 on the back side includes a drive circuit 33, light receiving elements 12-1, 12-2, 12-3 that are illuminance detection sensors constituting the light detection portion 34, and light source drive. The light receiving part 12a and the detection window part 15-1 of the light receiving element 12-1 are mounted via an adhesive member 13-1 made of transparent resin (epoxy resin, acrylic resin, etc.). The light receiving portion 12a of the light receiving element 12-2 and the detection window portion 15-2 are bonded via an adhesive member 13-2 made of a transparent resin, and the light receiving portion of the light receiving element 12-3. 12a and the detection window part 15-3 are bonded via an adhesive member 13-3 made of a transparent resin.
[0049]
The other configuration of the liquid crystal cell 1-1 is the same as that of the liquid crystal cell 1 of the first embodiment of the present invention described above, and the same reference numerals are given and the description thereof is omitted.
[0050]
As shown in FIG. 6, the backlight 32 is configured by arranging a light source unit 38 on a side surface of a light guide member 39, and the light source unit 38 includes a red LED (red light emitting diode) 41 and a green LED (green light emitting diode). ) 42 and a blue LED (blue light emitting diode) 43.
[0051]
In the backlight 32 configured in this way, the light emitted from the red, green, and blue LEDs 41, 42, and 43 is mixed to become white light, which is introduced into the light guide member 39, and the lower surface (group processing surface) ) And is emitted from the upper surface (hologram processing surface) to the liquid crystal cell 1-1 side.
[0052]
The backlight control circuit 36 receives detection signals S1, S2, and S3 detected by the light receiving elements 12-1, 12-2, and 12-3, and controls light source drive based on the detection signals S1, S2, and S3. The control signal S4 is output to the device 35.
[0053]
Next, a method for controlling the backlight 32 will be described.
[0054]
A part of the external light F incident from the front of the liquid crystal cell 1-1 is reflected at the interface between the transparent substrate 5 on the front side and the electrode 7 as shown by a solid line in FIG. And is reflected at the interface D between the transparent substrate 5 and the polarizing plate 23, and is reflected at the interface C between the electrode 7 and the liquid crystal layer 11 and is transmitted through the electrode 7, the transparent substrate 5 and the polarizing plate 23. Reflected at the interface between the polarizing plate 23 and the air layer.
[0055]
Further, a part of the external light F passes through the front transparent substrate 5 and the liquid crystal layer 11 and is reflected by the interface between the liquid crystal layer 11 and the color filter 10, and also by the scattering reflection layer 9 (g). Reflected. In this way, the reflected light is reflected by the scattering reflection layer 9 (g) toward each interface b, c, d, h, and this reflection is repeated to propagate through the inside of the transparent substrate 5 on the front side, thereby detecting the detection window. The light is emitted from the sections 15-1, 15-2, and 15-3.
[0056]
In this case, the emitted light emitted from the detection window portion 15-1 is split by the red detection color filter 16R provided in the detection window portion 15-1 to become red monochromatic light. The light passes through and enters the light receiving portion 12a of the light receiving element 12-1. Further, the emitted light emitted from the detection window portion 15-2 is split by the green detection color filter 16G provided in the detection window portion 15-2 to become green monochromatic light, and is transmitted through the adhesive member 13-2. Then, it enters the light receiving portion 12a of the light receiving element 12-2. Further, the emitted light emitted from the detection window portion 15-3 is split by the blue detection color filter 16B provided in the detection window portion 15-3 to become blue monochromatic light, and is transmitted through the adhesive member 13-3. Then, it enters the light receiving portion 12a of the light receiving element 12-3.
[0057]
Therefore, the light receiving element 12-1 detects the red monochromatic light in the external light F and outputs a detection signal S1 corresponding to the amount of received light. The monochromatic light is detected and a detection signal S2 corresponding to the received light amount is output, and the light receiving element 12-3 detects the blue monochromatic light in the external light F, and the detection signal S3 corresponding to the received light amount. Is output.
[0058]
The backlight control circuit 36 receives detection signals S1, S2, and S3 detected by the light receiving elements 12-1, 12-2, and 12-3, and a light source drive control device based on these detection signals S1, S2, and S3. 35 outputs a control signal S4.
[0059]
Therefore, the light source drive control device 35 can be driven within the rating of the light emitting diode LED while preventing application of overcurrent to, for example, the red, green and blue LEDs 41, 42 and 43, so that the reliability is improved.
[0060]
The light source drive control device 35 controls lighting for each of the red, green, and blue LEDs 41, 42, and 43 independently. These red, green and blue LEDs 41, 42 and 43 can be controlled in real time so that the color of the LEDs does not change. For this reason, the white balance of the illumination light is adjusted, and the white balance of the full-color image is always properly maintained, and accordingly the image quality is appropriately maintained.
[0061]
That is, when the white balance of the illumination light varies, the light amount balance (ratio of light amounts) in each pixel also varies. -2 and 12-3 are detected by comparing the detection results, and compensated by controlling the drive signal of the liquid crystal cell 1-1. Thereby, the white balance of the full-color image is maintained in an appropriate state.
[0062]
As described above, according to the second embodiment of the present invention, the white balance of the illumination light is adjusted by controlling in real time so that the colors of the red, green, and blue LEDs 41, 42, and 43 do not change. Let it run. As a result, the white balance of the full-color image is always properly maintained, and accordingly the image quality is appropriately maintained.
[0063]
(Third embodiment)
A third embodiment of the display device according to the present invention is shown in FIGS.
[0064]
In this display device, the light detection unit 34 and the control unit 40 according to the second embodiment of the present invention described above are integrated into an IC as a controller IC chip 45, and the controller IC chip 45 is a component of the liquid crystal cell 51. This is mounted on the mounting portion 5A.
[0065]
That is, an end portion of the transparent substrate 5 on the front side of the liquid crystal cell 1-2 that extends from the end side of the transparent substrate 6 on the back side and extends beyond the end side is formed in the component mounting portion 5A. A controller IC chip 45 is mounted on 5A. The other configuration of the liquid crystal cell 1-2 is the same as that of the liquid crystal cell 1 according to the first embodiment of the present invention described above, and the same reference numerals are given and description thereof is omitted.
[0066]
As shown in FIG. 10, the controller IC chip 45 is formed on a transparent single-layer substrate 45A, a light detection unit 46 corresponding to the light detection unit 34 of the second embodiment of the present invention, and a control unit 40. A corresponding control unit 40-1 is mounted. The light detection unit 46 includes light receiving elements 12-1, 12-2, and 12-3 that are illuminance detection sensors, and the control unit 40-1 receives a detection signal detected by the light detection unit 46. A light source drive control device 35 and a backlight control circuit 36 for controlling the light source unit 38 of the backlight 32 are provided. Further, bumps 47 project from the lower surface of the single layer substrate 45A, and input and output terminals 48 and 49 and a plurality of connection terminals 50 are formed on the surface of the single layer substrate 42A.
[0067]
As shown in FIG. 9, the controller IC chip 45 has its single-layer substrate 42A mounted on the component mounting portion 5A of the transparent substrate 5 on the front side via a transparent photocurable resin 52, and bumps 47 Are connected on an ITO wiring land (not shown) on the component mounting portion 5A.
[0068]
Further, red, green, and blue detection color filters 16R, 16G, and 16B are interposed between the light receiving elements 12-1, 12-2, and 12-3 constituting the light detection unit 46 and the component mounting unit 5A. The light receiving portion 12a of the light receiving element 12-1 faces the red detection color filter 16R, and the light receiving portion 12a of the light receiving element 12-2 faces the green detection color filter 16G. The light receiving portion 12a of the light receiving element 12-3 faces the blue detection color filter 16B. These red, green, and blue detection color filters 16R, 16G, and 16B are the same as the green, red, and blue color filters in the color filter 10 and transmit only visible light. A reflective film 51 is provided on the front surface of the component mounting portion 5A.
[0069]
In this case, a part of the external light F incident from the front of the liquid crystal cell 1 is reflected at the interface between the transparent substrate 5 on the front side and the electrode 7 as shown by a solid line in FIG. 5, and is reflected at the interface D between the transparent substrate 5 and the polarizing plate 23, and is reflected at the interface C between the electrode 7 and the liquid crystal layer 11 and passes through the electrode 7, the transparent substrate 5, and the polarizing plate 23. Thus, the light is reflected at the interface between the polarizing plate 23 and the air layer.
[0070]
Further, a part of the external light F passes through the front transparent substrate 5 and the liquid crystal layer 11 and is reflected by the interface between the liquid crystal layer 11 and the color filter 10, and also by the scattering reflection layer 9 (g). Reflected. In this way, the reflected light is reflected by the scattering reflection layer 9 (g) toward each interface b, c, d, e, and propagates inside the transparent substrate 5 on the front side by repeating this reflection. Then, a part of the external light F is emitted to the surface portion 5d of the transparent substrate 5, and is split by the red, green, and blue detection color filters 16R, 16G, and 16B to become red, green, and blue monochromatic light, The light is incident on the respective light receiving portions 12a of the light receiving elements 12-1, 12-2, and 12-3.
[0071]
Therefore, the light receiving element 12-1 detects the red monochromatic light in the external light F and outputs a detection signal S1 corresponding to the amount of received light. The monochromatic light is detected and a detection signal S2 corresponding to the received light amount is output, and the light receiving element 12-3 detects the blue monochromatic light in the external light F, and the detection signal S3 corresponding to the received light amount. Is output.
[0072]
The backlight control circuit 36 receives detection signals S1, S2, and S3 detected by the light receiving elements 12-1, 12-2, and 12-3, and controls light source drive based on the detection signals S1, S2, and S3. The control signal S4 is output to the device 35, and the same control as that of the backlight 32 in the second embodiment of the present invention described above is performed, and the color of the red, green and blue LEDs 41, 42, 43 does not change. To control in real time. For this reason, the white balance of the illumination light is adjusted, and the white balance of the full-color image is always properly maintained, and accordingly the image quality is appropriately maintained.
[0073]
As described above, according to the third embodiment of the present invention, the illuminance detection sensors (light receiving elements 12-1, 12-2, 12-3) and the control unit 40-1 that are independent from each other are integrated. An IC chip (controller IC chip 45) is formed, and this controller IC chip 45 is arranged on the surface of the component mounting portion 5A of the transparent substrate 5, and the illuminance detection sensors (light receiving elements 12-1, 12-2, 12-3). Since the red, green, and blue color filters 16R, 16G, and 16B are disposed opposite to the light receiving unit 12a, light reception by the illuminance detection sensors (light receiving elements 12-1, 12-2, and 12-3) is performed. Since the control by the control unit 40-1 is completed within the liquid crystal cell 1-2, accurate control can be performed, and miniaturization is possible.
[0074]
(Fourth embodiment)
A fourth embodiment of the display device according to the present invention is shown in FIGS.
[0075]
In this display device, red, green, and blue detection color filters 16R, 16G, and 16B are arranged on the front surface of the component mounting portion 5A of the transparent substrate 5 on the front surface side of the liquid crystal cell 1-3. The light receiving elements 12-1, 12-2, and 12-3 are mounted on the back surface of the component mounting portion 5A. The light receiving portion 12a of the light receiving element 12-1 faces the red detection color filter 16R, and the light receiving portion 12a of the light receiving element 12-2 faces the green detection color filter 16G. The light receiving unit 12a of 12-3 faces the blue detection color filter 16B.
[0076]
The other configuration of the liquid crystal cell 1-3 is the same as that of the liquid crystal cell 1 according to the first embodiment of the present invention described above, and the same reference numerals are given and description thereof is omitted.
[0077]
In this case, the external light F that has entered from the front of the liquid crystal cell 1-3 is split by the red, green, and blue detection color filters 16R, 16G, and 16B to be monochromatic light of red, green, and blue. The light passes through the part 5A and enters the light receiving part 12a of the light receiving elements 12-1, 12-2, 12-3.
[0078]
Therefore, the light receiving element 12-1 detects the red monochromatic light in the external light F and outputs a detection signal S1 corresponding to the amount of received light. The monochromatic light is detected and a detection signal S2 corresponding to the received light amount is output, and the light receiving element 12-3 detects the blue monochromatic light in the external light F, and the detection signal S3 corresponding to the received light amount. Is output.
[0079]
The detection signals S1, S2, and S3 detected by the light receiving elements 12-1, 12-2, and 12-3 are input to the backlight control circuit 36, for example, and the above-described book based on the detection signals S1, S2, and S3. The same control as that of the light source unit 38 of the backlight 32 in the second embodiment of the invention is performed, and control is performed in real time so that the colors of the red, green, and blue LEDs 41, 42, and 43 do not change.
[0080]
For this reason, the white balance of the illumination light is adjusted, and the white balance of the full-color image is always properly maintained, and accordingly the image quality is appropriately maintained.
[0081]
According to the above-described fourth embodiment of the present invention, the external light F incident from the front of the liquid crystal cell 1 is split by the red, green, and blue color detection color filters 16R, 16G, and 16B to be red, It becomes green and blue monochromatic light, passes through the component mounting portion 5A of the transparent substrate 5 on the front side, enters the light receiving portions 12a of the light receiving devices 12-1, 12-2, 12-3, and receives the light receiving device 12- 1 detects the red monochromatic light of the external light F and outputs a detection signal S1 corresponding to the received light amount, and the light receiving element 12-2 detects the green monochromatic light of the external light F. In order to output the detection signal S2 corresponding to the received light amount, the light receiving element 12-3 detects the blue monochromatic light of the external light F, and outputs the detection signal S3 corresponding to the received light amount. Although it is a simple configuration, it can reliably measure the surrounding color. .
[0082]
(Fifth embodiment)
FIG. 13 shows a fifth embodiment of the display device according to the present invention.
[0083]
In the fifth embodiment of the present invention, an extension of the color filter 10 is used for the detection color filter 16. That is, three color filters 10R, 10G, and 10B of red, green, and blue are arranged on the front transparent substrate 5 so as to correspond to the plurality of pixel regions, respectively. When the three color filters 10R, 10G, and 10B are arranged on the transparent substrate 5, an extension portion of the green color filter 10G is formed in an island shape corresponding to the light receiving element 12 that is a band or an illuminance detection sensor, This is a detection color filter 16.
That is, a color filter 16 for detection which is an example of light wavelength selection means is provided on the lower surface on the liquid crystal side of the transparent substrate 5 on the front surface side having a hexahedral shape, and an illuminance detection sensor is provided in the vicinity and perpendicular to the lower surface. By disposing the light receiving element 12, there is no need to provide a light wavelength selection means between the illuminance detection sensor and the transparent substrate 5, and the manufacturing man-hour can be reduced. When the light wavelength selection means is arranged on the front surface of the illuminance detection sensor, the surface must be flattened, which requires a lot of work, and when applying, it takes a long time to apply the coating, which requires a lot of work. However, the present invention has an effect that does not cause such a problem.
[0084]
Further, in the component mounting part 6A of the transparent substrate 6 on the back side, the light receiving element 12 is made of a transparent resin (epoxy resin, acrylic resin, etc.) with the light receiving part 12a facing the end surface 5a of the transparent substrate 5 on the front side. It is bonded via an adhesive member 13 consisting of In addition, in the liquid crystal cell 1-4, the same code | symbol is attached | subjected to the site | part of the same structure as the liquid crystal cell 1-1 of the above-mentioned 2nd Embodiment of this invention, and description is abbreviate | omitted.
[0085]
Here, as shown by the solid line in FIG. 13, a part of the external light F incident from the front of the liquid crystal cell 1-4 is reflected at the interface between the transparent substrate 5 on the front side and the electrode 8 and is reflected on the front side. The light passes through the transparent substrate 5, is reflected at the interface between the transparent substrate 5 and the polarizing plate 23, and is reflected at the interface C between the electrode 8 and the liquid crystal layer 11 so that the electrode 7, the transparent substrate 5 and the polarizing plate 23 The light is transmitted and reflected at the interface between the polarizing plate 23 and the air layer.
[0086]
Further, a part of the external light F passes through the transparent substrate 5 and the liquid crystal layer 11 on the front side and is reflected by the interface h between the liquid crystal layer 11 and the electrode 7 and also reflected by the scattering reflection layer 9 (g). Is done. Thus, the reflected light is reflected by each interface b, c, d, h, h and the scattering reflection layer 9 (g), and this reflection is repeated to propagate through the inside of the transparent substrate 5 on the front side. The light is split by the detection color filter 16 to become green monochromatic light, passes through the adhesive member 13, and enters the light receiving portion 12a of the light receiving element 12. Therefore, the light receiving element 12 detects green monochromatic light in the external light F and outputs a detection signal corresponding to the amount of light received.
[0087]
As described above, the amount of light detected by the illuminance detection sensor needs to be proportional to the illuminance. On the other hand, since the illuminance is a value including the visibility characteristic, the influence of the green (G) component is larger than that of red (R) and blue (B). Therefore, by using a green color filter as the detection color filter 16, a detection signal proportional to the illuminance can be obtained accurately.
[0088]
That is, since the green monochromatic light in the external light F is the light that matches the visual characteristics most in the visible light (the visual sensitivity is the highest), the green light is detected to detect the visible light. Illuminance can be measured reliably.
[0089]
According to the above-described fifth embodiment of the present invention, a part of the external light F incident from the front of the liquid crystal cell 1 propagates through the inside of the transparent substrate 5 on the front side while repeating reflection, and is green. The detection color filter 16 splits the light into green monochromatic light, which is emitted to the end surface portion 5a of the transparent substrate 5 on the front side, and the light receiving element 12 receives the green monochromatic light. Since the amount of light incident on the liquid crystal cell 1 and the amount of light propagating through the transparent substrate 5 are substantially proportional, the amount of light incident on the liquid crystal cell 1 can be accurately detected, and the green light of the external light F can be detected. Is the light that has the best visual characteristics among visible light (the highest visual sensitivity), and by detecting this green light, the illuminance of visible light can be reliably measured.
[0090]
Moreover, the detection color filter 16 is manufactured in order to use the same green color filter as the green color filter 10 for the green detection color filter 16G without using a special filter that transmits only visible light. It is easy and the cost of the display device can be reduced.
[0091]
In the first embodiment of the present invention described above, the green detection color filter 16G is used as the detection color filter. Instead of the green detection color filter 16G, red and blue detection color filters are used. 16R and 16B may be used.
[0092]
(Sixth embodiment)
FIG. 14 shows a sixth embodiment of the display device according to the present invention.
[0093]
In this display device, the detection color filter 16, the color filter 10, and the electrode 8 are arranged on the transparent substrate 6 on the back side, and an extension portion of the color filter 10 is used for the detection color filter 16. It is a thing. That is, three color filters 10R, 10G, and 10B of red, green, and blue are arranged on the front transparent substrate 5 so as to correspond to the plurality of pixel regions, respectively. When the three color filters 10R, 10G, and 10B are arranged on the transparent substrate 5, an extension portion of the green color filter 10G is formed in an island shape corresponding to the light receiving element 12 that is a band or an illuminance detection sensor, This is a detection color filter 16.
[0094]
Further, in the component mounting part 6A of the transparent substrate 6 on the back side, the light receiving element 12 is made of a transparent resin (epoxy resin, acrylic resin, etc.) with the light receiving part 12a facing the end surface 5a of the transparent substrate 5 on the front side. It is bonded via an adhesive member 13 consisting of The other configuration of the liquid crystal cell 1-4 is the same as the configuration of the liquid crystal cell 1 according to the first embodiment of the present invention described above, and the same reference numerals are given and description thereof is omitted.
[0095]
Here, as shown by a solid line in FIG. 14, a part of the external light F incident from the front of the liquid crystal cell 1-5 is reflected at the interface between the transparent substrate 5 on the front side and the electrode 7 and is reflected on the front side. The light passes through the transparent substrate 5, is reflected at the interface between the transparent substrate 5 and the polarizing plate 23, and is reflected at the interface C between the electrode 7 and the liquid crystal layer 11 so that the electrode 7, the transparent substrate 5 and the polarizing plate 23 The light is transmitted and reflected at the interface between the polarizing plate 23 and the air layer.
[0096]
Further, a part of the external light F passes through the front transparent substrate 5 and the liquid crystal layer 11 and is reflected by the interface between the liquid crystal layer 11 and the color filter 10, and also by the scattering reflection layer 9 (g). Reflected. In this way, the reflected light is reflected by the scattering reflection layer 9 (g) to each interface b, c, d, h, and this reflection is repeated to propagate through the inside of the transparent substrate 5 on the front side. The light is split by the detection color filter 16 to become green monochromatic light, passes through the adhesive member 13, and enters the light receiving portion 12a of the light receiving element 12. Therefore, the light receiving element 12 detects green monochromatic light in the external light F and outputs a detection signal corresponding to the amount of light received.
[0097]
As described above, the amount of light detected by the illuminance detection sensor needs to be proportional to the illuminance. On the other hand, since the illuminance is a value including the visibility characteristic, the influence of the green (G) component is larger than that of red (R) and blue (B). Therefore, by using a green color filter as the detection color filter 16, a detection signal proportional to the illuminance can be obtained accurately.
[0098]
That is, since the green monochromatic light in the external light F is the light that matches the visual characteristics most in the visible light (the visual sensitivity is the highest), the green light is detected to detect the visible light. Illuminance can be measured reliably.
[0099]
According to the sixth embodiment of the present invention described above, part of the external light F incident from the front of the liquid crystal cell 1-5 propagates through the inside of the transparent substrate 5 on the front side while repeating reflection. In order that the green color filter 16 splits the light into green monochromatic light, which is emitted to the end surface portion 5a of the transparent substrate 5 on the front side, and the light receiving element 12 receives the green monochromatic light. Since the amount of light incident on the liquid crystal cell 1 and the amount of light propagating through the transparent substrate 5 are approximately proportional, the amount of light incident on the liquid crystal cell 1 can be accurately detected, and the green color of the external light F can be detected. Since the light is the most suitable light in the visible light (the highest visual sensitivity), the illuminance of the visible light can be reliably measured by detecting this green light.
[0100]
Moreover, since the same green color filter 10G as the color filter 10 is used for the green detection color filter 16 without using a special filter that transmits only visible light, the detection color filter 16 is easy to manufacture. The cost of the display device can be reduced.
[0101]
In the above-described sixth embodiment of the present invention, the green detection color filter 16 is used as the detection color filter. However, instead of the green detection color filter 16, red and blue detection color filters are used. May be used.
In the fifth and sixth embodiments, the detection color filter has an Einland shape (island shape). However, in order to obtain the effects of the present invention, other shapes may be used to form an image and view the image. The color filter disposed in the image area that is the viewing area may be extended to be provided as a detection color filter.
When at least three light receiving elements are used as red (R), green (G), and blue (B), a color filter of a color corresponding to the color assigned to the light receiving element is disposed in the vicinity thereof. It is good. For example, a red color filter is disposed at an appropriate location so that light entering the light receiving element for detecting red becomes red light. The same applies to green and blue.
[0102]
Further, as shown in FIG. 15, the light detection unit 34 (46) and the drive circuit for driving the liquid crystal cell 1-1 (1-2) in the first to third embodiments of the present invention described above. The IC chips 50 and 51 may be mounted on the component mounting portion 6A of the transparent substrate 6 on the back side, as shown in FIG. In addition, the optical detection unit 34 (46) in the first to third embodiments of the present invention and the drive circuit 33 for driving the liquid crystal cell 1-1 (1-2) are integrated into an IC chip. Alternatively, the IC chip 52 may be mounted on the component mounting portion 6A of the transparent substrate 6 on the back side. Further, as shown in FIG. 17, the controller IC chip 45 in the fourth embodiment of the present invention described above and the IC chip 53 of the drive circuit 33 formed as an IC are connected to the component mounting portion 6A of the transparent substrate 6 on the back side. You may make it mount in.
[0103]
The light detection unit 24 and the light detection unit 46 of the controller IC chip 45 include a color filter for detection, but are not necessarily required.
[0104]
【The invention's effect】
As described above, according to the display device of the present invention, the external light incident from the front of the liquid crystal cell propagates while repeating reflection inside at least one transparent substrate, and the external light emitted from the transparent substrate. Since the illuminance detection sensor receives light, the amount of light incident on the liquid crystal cell and the amount of light propagating through the transparent substrate are substantially proportional, so that the amount of light incident on the liquid crystal cell can be accurately detected. In addition, the detection color filter can detect a detection signal proportional to the illuminance of visible light by detecting this monochromatic light (for example, green light) in order to cut infrared rays.
[0105]
In addition, according to the display device according to the present invention, since the color filter for detection having the same configuration as the color filter is used without using a special filter that transmits only visible light, the cost of the display device is reduced. be able to.
[0106]
Further, according to the display device of the present invention, when the white balance of the illumination light varies, the light amount balance (ratio of light amounts) in each pixel also varies. It is detected by comparing the detection results and compensated by controlling the driving signal of the liquid crystal cell. Thereby, the white balance of the full-color image is maintained in an appropriate state.
[0107]
In addition, according to the display device of the present invention, for example, the light source drive control device can drive the light emitting diode LED within the rating while preventing the application of overcurrent to the red, green and blue light emitting diode LEDs. Reliability is improved.
[0108]
Further, the light source drive control device can be lit for each of the red, green and blue light emitting diodes LED, and can be controlled in real time so that the color of the red, green and blue light emitting diodes LED does not change. For this reason, the white balance of the illumination light is adjusted, and the white balance of the full-color image is always properly maintained, and accordingly the image quality is appropriately maintained.
[0109]
Further, according to the display device of the present invention, since the light reception by the illuminance detection sensor and the control by the backlight luminance control means are completed within the liquid crystal cell, accurate control can be performed, and miniaturization can be achieved. .
[0110]
Further, according to the display device according to the present invention, the external light incident from the front of the liquid crystal cell is dispersed by the red, green, and blue detection color filters to obtain red, green, and blue monochromatic light. Monochromatic light is incident on the light receiving part of the illuminance detection sensor, and each illuminance detection sensor detects red light, green light, and blue light of the external light, and outputs detection signals corresponding to these received light amounts. Therefore, it is possible to reliably measure the surrounding color with a simple configuration.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a first embodiment of a display device according to the present invention.
FIG. 2 is a plan view of the display device.
FIG. 3 is a cross-sectional view taken along the line U-U in FIG. 2;
FIG. 4 is a schematic plan view of a second embodiment of a display device according to the present invention.
5 is a cross-sectional view taken along line WW in FIG.
FIG. 6 is a control block diagram in the display device.
FIG. 7 is a schematic plan view of a third embodiment of a display device according to the present invention.
8 is a cross-sectional view taken along line XX in FIG.
FIG. 9 is a detailed view of a Y part in FIG. 8;
FIG. 10 is a plan view of a control IC chip.
FIG. 11 is a schematic plan view of a fourth embodiment of a display device according to the present invention.
12 is a cross-sectional view taken along line ZZ in FIG.
FIG. 13 is a schematic longitudinal sectional view of a display device according to a fifth embodiment of the present invention.
FIG. 14 is a schematic longitudinal sectional view of a sixth embodiment of a display device according to the present invention.
FIG. 15 is a schematic plan view of a modification of the display device according to the present invention.
FIG. 16 is a schematic plan view of another modification of the display device according to the present invention.
FIG. 17 is a schematic plan view of another modification of the display device according to the present invention.
FIG. 18 is a schematic perspective view of a conventional display device.
[Explanation of symbols]
1, 1-1, 1-2, 1-3, 1-4 liquid crystal cell
2, 32 Backlight
3, 33 Drive circuit
4 Backlight control device (Backlight brightness control means)
5, 6 Transparent substrate
5A, 6A component mounting part
7, 8 electrodes
9 Scattering reflection layer
10 Color filter
10R Red color filter
10G green color filter
10B Blue color filter
11 Liquid crystal layer
12-1, 12-2, 12-3 Light receiving element (illuminance sensor)
16 Color filter for detection
16R Red color filter for detection
16G Green color filter for detection
16B Blue color filter for detection
34 Light detector
35 Light source drive control device (backlight brightness control means)
36 Operation control circuit (backlight brightness control means)
38 Light source
39 Light guide member
40 control unit (backlight brightness control means)

Claims (12)

  1. In a display device having a display cell formed by sealing an electro-optic conversion member between a pair of substrates in which at least one substrate has a color filter and at least one substrate is a transparent substrate,
    A display device, wherein a light receiving portion of an illuminance detection sensor is disposed opposite to a surface portion of at least one of the transparent substrates, and a light wavelength selection unit is disposed in the vicinity of the illuminance detection sensor.
  2. The display device according to claim 1, wherein the wavelength selection unit is made of the same member as the color filter.
  3. The display device according to claim 1, wherein the surface portion is a side surface of the transparent substrate, and the wavelength selection unit is disposed between the illuminance detection sensor and the side surface.
  4. The display device according to claim 1, wherein the surface portion is a flat portion of the transparent substrate, and the wavelength selection unit is disposed between the illuminance detection sensor and the flat portion.
  5. The display device according to claim 1, wherein a member having a reflection function is disposed on the substrate located on the opposite side to the viewing side.
  6. A display device using a display cell having a configuration in which an electro-optic conversion member is sealed with a sealing material between a pair of transparent substrates, at least one of which is a transparent substrate,
    A display device, comprising: a detection color filter that splits external light that has entered a transparent substrate and propagated through the transparent substrate into monochromatic light; and an illuminance detection sensor that detects the monochromatic light.
  7. The display cell is provided with color filters for displaying red, green, and blue, and the detection color filter is at least the same member as any one of the color filters for display. The display device according to claim 6.
  8. It has a display cell in which an electro-optic conversion member is sealed with a sealing material between a pair of transparent substrates, at least one of which is a transparent substrate, and has a backlight disposed on the back side of the display cell, A display device having backlight luminance control means for controlling the luminance of the backlight,
    Wavelength selection means that obtains red, green, and blue monochromatic light by splitting external light that has entered the at least one transparent substrate and propagated through the transparent substrate, and for independently detecting these monochromatic lights. A display device comprising: an illuminance detection sensor; and the backlight luminance control means for controlling the luminance of the backlight based on an amount of received light detected by the illuminance detection sensors.
  9. The display device according to claim 8, wherein the backlight includes a light source unit having red, green, and blue light emitting diodes (LEDs) and a light guide member disposed on a side of the light source unit.
  10. The illuminance detection sensor and the backlight luminance control means that are independent of each other are integrally formed on an IC chip, and the IC chip is disposed on at least one surface of the transparent substrate. The display device according to claim 8 or 9, wherein the wavelength selection means are arranged to face each other.
  11. 11. The wavelength selecting means comprising red, green, and blue color filters for detection is made of the same member as each of the red, green, and blue color filters of the display cell. The display device described.
  12. In a display device having a display cell formed by sealing an electro-optic conversion member between a pair of hexahedral substrates,
    An illuminance detection sensor is disposed on a surface portion of the transparent substrate, and a light wavelength selection unit is disposed on another surface portion near the illuminance detection sensor and orthogonal to the surface portion of the transparent substrate.
JP2003209033A 2003-08-27 2003-08-27 Display unit Pending JP2005070132A (en)

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Cited By (7)

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JP2007178982A (en) * 2005-12-28 2007-07-12 Lg Philips Lcd Co Ltd Liquid crystal display device and fabricating and driving method thereof
JP2007212890A (en) * 2006-02-10 2007-08-23 Epson Imaging Devices Corp Display apparatus
JP2008152018A (en) * 2006-12-18 2008-07-03 Seiko Epson Corp Electro-optical device and its manufacturing method
US7514662B2 (en) 2006-04-13 2009-04-07 Epson Imaging Devices Corporation Illuminating device, electro-optical device, and electronic apparatus
JP2009168960A (en) * 2008-01-15 2009-07-30 Sony Corp Display device and luminance adjustment method for display device
JP2010127635A (en) * 2008-11-25 2010-06-10 Sharp Corp Photodetecting semiconductor apparatus and mobile device
US9477105B2 (en) 2014-04-01 2016-10-25 Samsung Display Co., Ltd. Display device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007178982A (en) * 2005-12-28 2007-07-12 Lg Philips Lcd Co Ltd Liquid crystal display device and fabricating and driving method thereof
US8524516B2 (en) 2005-12-28 2013-09-03 Lg Display Co., Ltd. Liquid crystal display device and fabricating and driving method thereof
US7944429B2 (en) 2005-12-28 2011-05-17 Lg Display Co., Ltd. Liquid crystal display device having photo-sensor and fabricating method and driving method thereof
JP2007212890A (en) * 2006-02-10 2007-08-23 Epson Imaging Devices Corp Display apparatus
US7576309B2 (en) 2006-04-13 2009-08-18 Epson Imaging Devices Corporation Illuminating device, electro-optical device, and electronic apparatus
US7514662B2 (en) 2006-04-13 2009-04-07 Epson Imaging Devices Corporation Illuminating device, electro-optical device, and electronic apparatus
JP2008152018A (en) * 2006-12-18 2008-07-03 Seiko Epson Corp Electro-optical device and its manufacturing method
JP2009168960A (en) * 2008-01-15 2009-07-30 Sony Corp Display device and luminance adjustment method for display device
US8284176B2 (en) 2008-01-15 2012-10-09 Sony Corporation Display device and luminance control method therefor
JP4661875B2 (en) * 2008-01-15 2011-03-30 ソニー株式会社 Display device and brightness adjustment method for display device
JP2010127635A (en) * 2008-11-25 2010-06-10 Sharp Corp Photodetecting semiconductor apparatus and mobile device
JP4647004B2 (en) * 2008-11-25 2011-03-09 シャープ株式会社 Photodetection semiconductor device and mobile device
US9477105B2 (en) 2014-04-01 2016-10-25 Samsung Display Co., Ltd. Display device

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