CN104424877B - Projection display equipment and driving method - Google Patents
Projection display equipment and driving method Download PDFInfo
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- CN104424877B CN104424877B CN201310410674.4A CN201310410674A CN104424877B CN 104424877 B CN104424877 B CN 104424877B CN 201310410674 A CN201310410674 A CN 201310410674A CN 104424877 B CN104424877 B CN 104424877B
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Abstract
The invention discloses a kind of projection display equipment and driving method, projection display equipment includes image processing module and light source drive.Image processing module to receive image data and produce display signal, wherein foregoing display signal include image during with dark-state during.Light source drive is to produce light source drive signal to drive projection light source, wherein foregoing light source drive signal is interior during dark-state to have the first section and the second section, and light source drive signal is in the signal averaging amplitude of the second section signal averaging amplitude interior during image less than light source drive signal.
Description
Technical field
The present invention is related to a kind of projection display equipment, and in particular to a kind of throwing that technology is inserted using dark picture
Shadow display device and its driving method.
Background technology
With the lifting of image analytic degree, for the requirement also more and more higher of the display quality of image.Cause to show image
The fuzzy origin cause of formation has a many, such as when reaction time of display picture element is excessively slow, image zoom reduces resolution mend point or remove,
Image compression causes distortion or human eye to be chased after for the vision that quickly moves, and to cause dynamic image to show fuzzy.
Fig. 1 is refer to, Fig. 1 is to illustrate a kind of schematic diagram of dark picture insertion according to prior art.In the prior art, it is right
In the improved one way in which of the display quality of dynamic image to insert dark picture (black frame insertion).
As shown in figure 1, in general, the mode for inserting dark picture is typically that image data 100 is inserted with the time of fixed proportion
Black picture data 102 so that image data 100 has during image Tb during Ta and dark-state.If the backlight in display device
Tb sets longer during (as shown in light source drive signal 120), dark-state are fixed in brightness, then the reality output brightness that image is shown is got over
It is low.Furthermore, display device does not export any image actually in Tb actually during dark-state, therefore the backlight of display device
The power of generation equally forms extra power dissipation, and the dynamic contrast that will also result in display device declines.
Thus, so far, being familiar with this field person, its solution is looked in its poor effort invariably, the problem of to improve above-mentioned
Crux.
The content of the invention
The problem of in order to solve above-mentioned, this disclosure provides a kind of projection display equipment.Projection display equipment is included
Image processing module and light source drive.Image processing module is to receive image data and produce display signal, wherein foregoing
Display signal include image during with dark-state during.Light source drive is to produce light source drive signal to drive projected light
Source, wherein foregoing light source drive signal is interior during dark-state to have the first section and the second section, and light source drive signal exists
The signal averaging amplitude of the second section signal averaging amplitude interior during image less than light source drive signal.
According to one embodiment of the invention, wherein foregoing light source drive signal is big in the signal averaging amplitude of the first section
Shaken in light source drive signal in the signal averaging interior during image with light source drive signal of the signal averaging amplitude of the second section
Width.
According to one embodiment of the invention, wherein when foregoing light source drive signal is in positive half cycle, light source driving letter
Number the first section current level higher than light source drive signal the second section current level.
According to one embodiment of the invention, wherein when foregoing light source drive signal is in negative half period, light source driving letter
Number second section current level higher than light source drive signal the first section current level.
According to one embodiment of the invention, wherein signal averaging amplitude of the foregoing light source drive signal in second section
About the light source drive signal during the image in signal averaging amplitude 30%.
According to one embodiment of the invention, wherein foregoing light source drive signal this first and second section signal
Mean amplitude of tide is zero.
Another aspect of the present invention is to provide a kind of projection display equipment.Projection display equipment includes image processing list
Member, display unit, microcontroller, light source drive and projection light source.Display unit is electrically connected with image process unit, and aobvious
Show unit to produce a signal of video signal, wherein signal of video signal include image during with dark-state during.Microcontroller is electrically connected with
Image process unit.Light source drive is electrically connected with microcontroller and display unit.Projection light source is electrically connected with light source drive,
And to project signal of video signal to a projection screen, wherein light source drive is foregoing to drive to produce a light source drive signal
Projection light source, and light source drive signal during dark-state have the first section and the second section, light source drive signal is second
The signal averaging amplitude of section is not more than light source drive signal signal averaging amplitude interior during image.
The another aspect of the present invention provides a kind of to drive projection display equipment with the driving method of image data displaying.
Driving method is comprised the steps of：Receive and adjust image data, make image data have an image during with a dark-state during；
And the light source drive signal of the projection light source of adjustment projection display equipment, light source drive signal is had first during dark-state
Section and the second section, and light source drive signal is less than the light source drive signal in image in the signal averaging amplitude of the second section
Signal averaging amplitude in period.
According to one embodiment of the invention, wherein the light source drive signal of the projection light source of foregoing adjustment projection arrangement
Light source drive signal is more set greater than light source drive signal in the secondth area in the signal averaging amplitude of the first section in step
The signal averaging amplitude of the section signal averaging amplitude interior during image with light source drive signal.
According to one embodiment of the invention, wherein when foregoing light source drive signal is in positive half cycle, light source is driven
Signal is set above current level of the light source drive signal in the second section in the current level of the first section.
According to one embodiment of the invention, wherein when foregoing light source drive signal is in negative half period, light source is driven
Signal is set above current level of the light source drive signal in the first section in the current level of the second section.
According to one embodiment of the invention, wherein the signal averaging amplitude by light source drive signal in second section is set
For the 30% of light source drive signal signal averaging amplitude interior during image.
According to one embodiment of the invention, wherein in a light source drive signal of the projection light source for adjusting the projection arrangement
The step of in signal averaging amplitude more by foregoing light source drive signal in the first and second sections be set to zero.
In summary, technical scheme has clear advantage and beneficial effect compared with prior art.Pass through
Above-mentioned technical proposal, can reach suitable technological progress, and with the extensive value in industry, this disclosure is provided
One projection display equipment and its driving method, can improve image quality and while reduce power consumption.
Above-mentioned explanation will be explained in detail with embodiment below, and technical scheme is provided more to enter
The explanation of one step.
Brief description of the drawings
For above and other purpose, feature, advantage and the embodiment of the present invention can be become apparent, institute accompanying drawings are said
It is bright as follows：
Fig. 1 is to illustrate a kind of schematic diagram of dark picture insertion according to prior art；
Fig. 2 is to illustrate a kind of schematic diagram of projection display equipment according to one embodiment of the invention；
Fig. 3 is the oscillogram that light source drive signal is illustrated according to one embodiment of the invention；
Fig. 4 A are the oscillogram that light source drive signal is illustrated according to further embodiment of this invention；
Fig. 4 B are to illustrate a kind of schematic diagram of light source drive as shown in Figure 2 according to the embodiment of the present invention；And
Fig. 5 is to illustrate a kind of schematic diagram of driving method according to one embodiment of the invention.
Wherein, description of reference numerals is as follows：
Image data：100
Black picture data：102
Light source drive signal：120
Projection display equipment：200
Image processing module：220
Image process unit：222
Display unit：224
Light source drive：240
Projection light source：260
Microcontroller：280
Input interface：282
Memory：284
Brightness control module：420
Light-adjusting module：440
Power transfer module：460
Driving method：500
Step：510、520
During image：Ta
During dark-state：Tb
First section：T1
Second section：T2
Image data：Vimage
Show signal：Vdata
Light source drive signal：Vdrive
Current controling signal：Vctrl1
Dimming control signal：Vctrl2
Dim signal：Vdimm
Embodiment
Hereafter coordinate institute accompanying drawings to elaborate for embodiment, but the embodiment provided and be not used to the limitation present invention
The scope covered, and the description of structure operation is not used to limit the order of its execution, any structure reconfigured by element,
It is produced with it is equal the effects such as device, be all the scope that is covered of the present invention.In addition, schema is only for the purpose of description, not
According to full size mapping.To make to readily appreciate, similar elements will be illustrated with identical symbology in the description below.
On " first " used herein, " second " ... etc., not especially censure the meaning of order or cis-position,
It is not used to limit the present invention, its element described with constructed term just for the sake of difference or operation.
It is commonly the error or scope of exponential quantity in hundred on " about " used herein, " about " or " substantially "
Point 20 within, it and is more preferably then within 5 percent within 10 to be preferably.Wen Zhongruo is without specifically
Bright, the numerical value mentioned by it all regards as approximation, for example can be such as the error or model represented by " about ", " about " or " substantially "
Enclose, or other approximations.
In addition, on " coupling " used herein or " connection ", can refer to two or multiple element mutually directly put into effect
Body is in electrical contact, or mutually puts into effect body or in electrical contact indirectly, can also refer to two or multiple element mutual operation or action.
Fig. 2 is refer to, Fig. 2 illustrates a kind of schematic diagram of projection display equipment according to one embodiment of the invention.Such as Fig. 2 institutes
Show, projection display equipment 200 includes image processing module 220 and light source drive 240.Image processing module 220 is to connect
Receive image data Vimage and simultaneously produce display signal Vdata, wherein foregoing display signal Vdata have during image Ta with it is dark
Tb during state.In other words, image data Vimage carries out image processing by image processing module 220, thus to image number
Technology is inserted using foregoing dark picture so that display signal Vdata waveform has Ta and dark-state during image according to Vimage
Period Tb.Light source drive is to produce light source drive signal Vdrive to drive the projection light source in projection display equipment 200
260, and light source drive signal Vdrive has the first section and the second section, light source driving letter in Tb during foregoing dark-state
Number Vdrive is flat less than signals of the light source drive signal Vdrive during image in Ta in the signal averaging amplitude of the second section
Equal amplitude（As shown in following Fig. 3）.In short, during signal Vdata dark-state is shown in Tb, by being reduced or switched off light source
Drive signal Vdrive signal averaging amplitude reduces the power consumption of projection display equipment 200, and simultaneously by during dark-state
Background luminance in Tb reduces to add overall dynamic contrast.
It is worth noting that, foregoing light source drive signal Vdrive can be voltage signal or current signal, it can also refer to
The driving current of projection light source 260 is flowed through, the present invention is not limited thereto, be familiar with the visual practical application of skilled person and accordingly set
Put.
On the other hand, as shown in Fig. 2 image processing module 220 can further include image process unit 222 and display list
Member 224.Image process unit can be used to image data Vimage computings and perform the operation of dark picture insertion, and display unit
224 are electrically connected with image process unit 222, the display signal Vdata foregoing to produce and show of display unit 224, display
Unit 224 can be panel or corresponding liquid crystal panel with light valve etc..Furthermore, projection display equipment also can be wrapped further
Containing microcontroller 280 and memory 284.Microcontroller 280 is to receive input interface 282 with the control signal of input to enter
Row Dimming operation, and memory 284 is electrically connected with image process unit 222, memory 284 can be used to provide image process unit
222 perform cushion space required during computing.For example, input interface 282 can be keyboard or infrared remote controller etc..
And in structure, microcontroller 280 be electrically connected with input interface 282, light source drive 240 be electrically connected with microcontroller 280 with
Display unit 224, and projection light source 260 is then electrically connected between light source drive 240, to complete corresponding brightness adjustment control, and
The image that display unit 224 is shown（Example：Show signal Vdata）It is projeced into projection screen.
Different embodiment in present invention explained below, to complete above-mentioned adjustment light source drive signal Vdrive.
Fig. 3 is refer to, Fig. 3 is the oscillogram that light source drive signal is illustrated according to one embodiment of the invention.As shown in figure 3, in display
During signal Vdata dark-state in Tb, light source drive signal Vdrive has the first section T1 and the second section T2, and light source drives
Dynamic signal Vdrive the second section T2 signal averaging amplitude less than light source drive signal Vdrive during image in Ta
Signal averaging amplitude.In this embodiment, light source drive signal Vdrive is more than light in the first section T1 signal averaging amplitude
Signal averaging amplitudes and light source drive signal signal image during Ta in of the source drive signal Vdrive in the second section T2
Mean amplitude of tide.For example, the projection light source 260 of projection display equipment 200 can be high-pressure discharge lamp（UHP lamp）.High pressure
The drive characteristic of discharge lamp passes through driving current（That is, light source drive signal Vdrive）During by electrode in light fixture, pass through electricity
The high-voltage tip discharging of pole reaches luminous characteristic.
In operation, when driving current through electrode, we can be by light source drive signal Vdrive in the first section T1
Signal averaging amplitude increase with transient rise brightness, to reduce scintillation produced during driving current commutation, so may be used
Increase the electrode shape design and the service life of light fixture of high-pressure discharge lamp.And in the second section T2, light source can be driven and believed
Number Vdrive signal averaging amplitude reduction, to save unnecessary power consumption.For example, as shown in figure 3, when light source drives letter
When number Vdrive is in positive half cycle, light source drive signal Vdrive is higher than light source drive signal in the first section T1 current level
Current levels of the Vdrive in the second section.Conversely, when light source drive signal Vdrive is in negative half period, light source drive signal
Vdrive is higher than current levels of the light source drive signal Vdrive in the first section T1 in the second section T2 current level.It is actual
Using upper, in the case where projection light source 260 is high-pressure discharge lamp, because the characteristic of high-pressure discharge lamp is not in the short time
Can quickly be turned on and off, thus foregoing light source drive signal Vdrive the second section T2 signal averaging amplitude about
The 30% of signal averaging amplitudes of the light source drive signal Vdrive during image in Ta is may be configured as, but the present invention is not with this
It is limited, is familiar with the visual practical application elasticity adjustment of this field person.
Fig. 4 A are refer to, Fig. 4 A illustrate the oscillogram of light source drive signal according to further embodiment of this invention.Such as Fig. 4 A institutes
Show, in this embodiment, foregoing projection light source 260 can be solid-state illumination lamp source（Solid state illumination,
SSI）Or LED lamp, due to quick in the light source characteristic permission time of its solid-state illumination lamp source or LED light lamp
Be turned on and off, therefore in the present embodiment can be by light source drive signal Vdrive in the first section T1 and the second section T2 letter
Number mean amplitude of tide is zero, the power dissipation during dark-state in Tb is completely eliminated.
Fig. 4 B are refer to, Fig. 4 B are to illustrate a kind of signal of light source drive as shown in Figure 2 according to the embodiment of the present invention
Figure.As shown in Figure 4 B, in the foregoing embodiments, light source drive 240 can be applied to Fig. 4 A embodiment, and can be further
Include brightness control module 420, light-adjusting module 440 and power transfer module 460.Brightness control module 420 is used to according to electric current
Control signal Vctrl1 and dimming control signal Vctrl2 produces dim signal Vdimm.Light-adjusting module 440 is used to be believed according to light modulation
The brightness of numbers 440 adjustment projection light sources 260.Power transfer module 460 is to change and export a driving voltage source.Citing and
Speech, brightness control module 420 can be PWM control modules or fixed current controling circuit, can be by the sensing under light-adjusting module 440
Resistance carries out feedback control, and light-adjusting module 440 can be power switch or multiple adjustable current limiting switch arrays, by passing through
Current controling signal Vctrl1 adjusts foregoing light source drive signal Vdrive signal averaging amplitude, and is believed by brightness adjustment control
Number Vctrl2 completes corresponding brightness adjustment control.Furthermore, Fig. 2 is refer to, projection display equipment 200 can more enter in the present embodiment
Foregoing current controling signal Vctrl1 and dimming control signal is received to one step from input interface 282 by microcontroller 280
Vctrl2。
Another aspect of the present invention is to provide a kind of to drive a projection display equipment with the driving side of image data displaying
Method.Fig. 5 is refer to, Fig. 5 is to illustrate a kind of schematic diagram of driving method according to one embodiment of the invention.As shown in figure 5, driving
Method 500 includes step 510 and step 520.In step 510, by receiving and adjusting image data, so that image data has
There is during an image Tb during Ta and a dark-state.For example, received by audio-visual transmission interface after image data, and to image
Data carry out the computing of dark picture insertion, image data is had during image Tb during Ta and dark-state.In step 520
In, the light source drive signal Vdrive of the projection light source of projection display equipment is can adjust, makes light source drive signal Vdrive dark
There is one first section T1 and the second section T2 during state, and light source drive signal Vdrive is in the second section T2 signal averaging
Amplitude is less than signal averaging amplitudes of the light source drive signal Vdrive during image in Ta.
In step 520, can further by light source drive signal Vdrive the first section T1 signal averaging amplitude
The signal averaging amplitude that light source drive signal Vdrive is set greater than in the second section T2 exists with light source drive signal Vdrive
Signal averaging amplitude during image in Ta.For example, as shown in figure 3, when the projection light source 260 of projection display equipment 200
During for high-pressure discharge lamp, light source drive signal Vdrive can be put down in the first section T1 signal according to the characteristic of high-pressure discharge lamp
Equal amplitude increase, and in the second section T2, light source drive signal Vdrive signal averaging amplitude can be reduced, to save not
Necessary power consumption.For example, when light source drive signal Vdrive is in positive half cycle, light source drive signal Vdrive can be existed
First section T1 current level is arranged at the current level in the second section T2 higher than light source drive signal Vdrive.Conversely,
When light source drive signal Vdrive be in negative half period when, can by light source drive signal Vdrive the second section T2 current level
It is arranged at the current level in the first section T1 higher than light source drive signal Vdrive.In this embodiment, can be by foregoing light
Source drive signal Vdrive is set to light source drive signal Vdrive during image in the second section T2 signal averaging amplitude
30% of signal averaging amplitude in Ta.
On the other hand, in step 520, can be further by light source drive signal Vdrive in the first section T1 and second
Section T2 signal averaging amplitude is set to zero, to reduce power consumption of the projection display equipment during dark-state in Tb.For example,
As shown in Figure 4 A, can be if the projection light source 260 of projection display equipment 200 is solid-state illumination lamp source or LED light lamp
Tb completely closes light source drive signal Vdrive in during dark-state, reaches that higher power is saved and dynamic contrast with this.
In summary, it can learn that the projection display equipment shown in present invention drives with it by above-mentioned various embodiments
Method can reduce the power consumption of projection display equipment by being reduced or switched off the signal averaging amplitude of light source drive signal, and
Background luminance interior during dark-state is reduced simultaneously to add effect of overall dynamic contrast.
Although the present invention is disclosed above with embodiment, so it is not limited to the present invention, any to be familiar with this skill
Person, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, therefore protection scope of the present invention is worked as
Depending on appended claims, the person of defining is defined.
Claims (13)
1. a kind of projection display equipment, comprising：
One image processing module, shows signal, the wherein display signal includes a shadow to receive an image data and produce one
During picture with a dark-state during；And
One light source drive, to produce a light source drive signal to drive a projection light source, wherein the light source drive signal exists
There is one first section and one second section in during the dark-state, and the light source drive signal is in the signal averaging of second section
The amplitude signal averaging amplitude interior during the image less than the light source drive signal；
Wherein the light source drive signal is more than the light source drive signal in secondth area in the signal averaging amplitude of first section
The signal averaging amplitude of the section signal averaging amplitude interior during the image with the light source drive signal.
2. projection display equipment as claimed in claim 1, wherein when the light source drive signal is in positive half cycle, the light source drives
Dynamic signal is higher than current level of the light source drive signal in second section in the current level of first section.
3. projection display equipment as claimed in claim 1, wherein when the light source drive signal is in negative half period, the light source drives
Dynamic signal is higher than current level of the light source drive signal in first section in the current level of second section.
4. the projection display equipment as described in claim 1,2 or 3, wherein signal of the light source drive signal in second section
Mean amplitude of tide is about the 30% of light source drive signal signal averaging amplitude interior during the image.
5. projection display equipment as claimed in claim 1, the wherein light source drive signal this first and second section
Signal averaging amplitude is zero.
6. projection display equipment as claimed in claim 5, the wherein light source drive are also included：
One brightness control module, to produce a dim signal according to a current controling signal and a dimming control signal；With
And
One light-adjusting module, the brightness to adjust the projection light source according to the dim signal.
7. projection display equipment as claimed in claim 6, the wherein projection display equipment also include a microcontroller, to certainly
One input interface receives the current controling signal and the dim signal.
8. a kind of projection display equipment, comprising：
One image process unit；
One display unit, is electrically connected with the image process unit, to produce a signal of video signal, and wherein the signal of video signal includes one
During image with a dark-state during；
One microcontroller, is electrically connected with the image process unit；
One light source drive, is electrically connected with the microcontroller and the display unit；And
One projection light source, is electrically connected with the light source drive, and to project the signal of video signal to a projection screen,
Wherein the light source drive is to produce a light source drive signal to drive the projection light source, and the light source drive signal exists
There is one first section and one second section, signal averaging amplitude of the light source drive signal in second section during the dark-state
No more than the light source drive signal during the image in signal averaging amplitude；
Wherein the light source drive signal is more than the light source drive signal in secondth area in the signal averaging amplitude of first section
The signal averaging amplitude of the section signal averaging amplitude interior during the image with the light source drive signal.
9. a kind of driving method, to drive a projection display equipment to show an image data, the driving method is included：
Receive and adjust the image data, make the image data have an image during with a dark-state during；And
A light source drive signal of a projection light source of the projection display equipment is adjusted, makes the light source drive signal in the dark-state phase
Between have one first section and one second section, and the light source drive signal second section signal averaging amplitude be less than this
Light source drive signal signal averaging amplitude interior during the image；
Wherein also included in the step of adjusting a light source drive signal of a projection light source for the projection arrangement：The light source is driven
Dynamic signal is set greater than the light source drive signal in the signal averaging amplitude of first section and put down in the signal of second section
The equal amplitude signal averaging amplitude interior during the image with the light source drive signal.
10. driving method as claimed in claim 9, wherein when the light source drive signal is in positive half cycle, the light source is driven
Dynamic signal is set above current level of the light source drive signal in second section in the current level of first section.
11. driving method as claimed in claim 9, wherein when the light source drive signal is in negative half period, the light source is driven
Dynamic signal is set above current level of the light source drive signal in first section in the current level of second section.
12. the driving method as described in claim 9,10 or 11, wherein by the light source drive signal second section letter
Number mean amplitude of tide be set to the light source drive signal during the image in signal averaging amplitude 30%.
13. driving method as claimed in claim 9, wherein adjusting the light source driving of a projection light source of the projection arrangement
Also included in the step of signal：
By the light source drive signal this first and the signal averaging amplitude of second section be set to zero.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310410674.4A CN104424877B (en) | 2013-09-10 | 2013-09-10 | Projection display equipment and driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310410674.4A CN104424877B (en) | 2013-09-10 | 2013-09-10 | Projection display equipment and driving method |
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| CN104424877A CN104424877A (en) | 2015-03-18 |
| CN104424877B true CN104424877B (en) | 2017-09-26 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1489590A4 (en) * | 2002-03-28 | 2008-07-23 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| US7474302B2 (en) * | 2004-02-12 | 2009-01-06 | Seiko Epson Corporation | Electro-optical device, driving method of electro-optical device, driving circuit of electro-optical device and electronic apparatus |
| US8164557B2 (en) * | 2004-10-29 | 2012-04-24 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and method for driving the same |
| TWI433117B (en) * | 2006-03-22 | 2014-04-01 | Fujifilm Corp | Liquid crystal display and method of displaying thereof |
| TW200739507A (en) * | 2006-03-23 | 2007-10-16 | Toshiba Matsushita Display Tec | Liquid crystal display device |
| JP5153003B2 (en) * | 2009-08-19 | 2013-02-27 | ウシオ電機株式会社 | High pressure discharge lamp lighting device and projector |
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