CN101645240B - Automatic backlight correction method for display - Google Patents
Automatic backlight correction method for display Download PDFInfo
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- CN101645240B CN101645240B CN2008101458238A CN200810145823A CN101645240B CN 101645240 B CN101645240 B CN 101645240B CN 2008101458238 A CN2008101458238 A CN 2008101458238A CN 200810145823 A CN200810145823 A CN 200810145823A CN 101645240 B CN101645240 B CN 101645240B
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Abstract
The invention relates to an automatic backlight correction method for a display. Picture data is maintained to be displayed in the overall target visual luminance by a panel drive power and a backlight drive power. The overall target visual luminance is formed by adding and multiplying target panel visual luminance and target backlight visual luminance. The method comprises the following steps: driving a display panel of the display by the black frame insertion or black frame insertion combining over-drive technology to provide actual panel visual luminance for the picture data; transmitting a light dimming signal to raise the backlight drive power automatically when the actual panel visual luminance is smaller than the target panel visual luminance so as to raise the target backlight visual luminance to corrected backlight visual luminance automatically; therefore, the picture data is maintained to be displayed in the overall target visual luminance after the actual panel visual luminance and the corrected backlight visual luminance are added and multiplied.
Description
Technical field
The present invention relates to a kind of correction method backlight of display, be meant especially a kind of in actual panel vision legibility during less than target board vision legibility, the revisal method of keeping overall goals vision legibility backlight automatically.
Background technology
In the highly developed epoch of multimedia science and technology, become pith indispensable in the life already unconsciously in order to the display of display image.Because display newly developed has advantages such as high display resolution and dimensions be lightening, so also replace the tradition tubular type display of videoing synchronously gradually along with the evolution of development in science and technology step.Particularly recently along with the lasting exploitation of large size panel, various panel type displays are applied to desktop PC, notebook, Digital Television, mobile phone, personal digital assistant (Personal Digital Assistant gradually; PDA), electronic multimedia such as digital camera or digital camera device.
On practice utilization aspect, the panel type display comprises a display panel, a panel driver and a backlight usually, and with a distributing board (Printed Wiring Board; PWB) form above-mentioned electronic multimedia device.During each stroke face data in these electronic multimedia device display image datas, must receive view data earlier, a display panel that utilizes a panel driving electric to order about display then shows each stroke face data, thinks that each stroke face data provides a panel vision legibility; Simultaneously, utilize a backlight of a backlight drive electric power display, use, after panel vision legibility and vision legibility backlight addition are taken advantage of, can obtain an overall goals vision legibility to each stroke face data provides a vision legibility backlight.Under above argumentation basis, below will continue in conjunction with the accompanying drawings above-mentioned prior art to be enumerated an embodiment and two application example is specified.Wherein, first application examples utilizes black insertion technology to solve the problem of ghost; Second application examples then combines black insertion technology and solves the ghost problem with the Driving technique that exceeds the quata, and shortens the reaction time.
See also Fig. 1 to Fig. 5, Fig. 1 is the functional block diagram of prior art embodiment; Fig. 2 is in first application examples of prior art embodiment, and panel driving electric power, picture show the graph of a relation of time and image time; Fig. 3 is in first application examples of prior art embodiment, and panel legibility, picture show the graph of a relation of time and image time; Fig. 4 is in first application examples of prior art embodiment, and backlight drive electric power, picture show the graph of a relation of time and image time; Fig. 5 is in first application examples of prior art embodiment, and legibility backlight, picture show the graph of a relation of time and image time.As shown in the figure, an electronic multimedia device 100 can be in order to show at least one view data.
When electronic multimedia device 100 display image datas, must receive view data earlier, view data can be external image data 200, or is pre-stored in the internal image data 112a of image data base 112.Wherein, external image data 200 can utilize wired or wireless transmission manner to be sent to microprocessing unit 111 via image data transmitting/receiving interface 113, and internal image data 112a then directly is downloaded to microprocessing unit 111 from image data base 112.Microprocessing unit 111 can be handled view data, and image data analyzing is gone out many strokes face data, each picture data is included at least one target drives electric power in the Preset Time, calculate when panel driving electric PDP is target drives electric power for microprocessing unit 111, panel driving electric power the target board vision legibility that can provide picture data.
Then, microprocessing unit 111 can transmit a shows signal S1 to panel driver 21 according to the target board vision legibility of each stroke face data.Generally speaking, in order to solve the problem of ghost, can adopt black insertion technology usually.That is, panel driver 21 can become at least one above-mentioned target drives electric power and at least one benchmark electric power less than target drives electric power with panel driving electric power PDP by target drives electric power modulation according to shows signal S1, provide the panel driving electric power PDP that is formed by target drives electric power and benchmark electric power to order about 13 pairs of display panels 22 of power supply, make display panel 22 provide an actual panel vision legibility for each picture data.Apparently, because the application of black insertion technology can cause actual panel vision legibility less than above-mentioned target board vision legibility.
Simultaneously, backlight driver 121 can order about power supply 13 and provide a backlight drive electric power BDP1 and another backlight drive electric power BDP2 to backlight 23 and key-press module backlight 123 respectively.Backlight drive electric power BDP1 can order about 23 pairs of display panels 22 of backlight and provide backlight, thinks that each picture data provides a vision legibility backlight.Backlight drive electric power BDP2 can order about 123 pairs of key-press modules of key-press module backlight (not indicating) and provide backlight.When the user thinks that vision legibility backlight is not enough, can send a backlight adjustment signals S2 to backlight driver 121 by operating adjustment operation-interface 122 backlight, increasing backlight drive electric power BDP1, and increase vision legibility backlight simultaneously.
Shown in Figure 2, a view data comprises three stroke face data, and three stroke face data show in three pictures show time (Presented Frame Time) PFT1～PFT3 respectively.The first stroke picture data is preset as panel driving electric power PDP three target drives electric power PP11～PP13 respectively in three image times (Frame Time) FT11～FT13, the second stroke face data are preset as panel driving electric power PDP three target drives electric power PP21～PP23 respectively in three image time FT21～FT23, the 3rd stroke face data are preset as panel driving electric power PDP three target drives electric power PP31～PP33 respectively in three image time FT31～FT33.
In the application of black insertion technology, when image time FT11 is divided into a black plug apart from BT11 and when work apart from WT11.When black plug, in BT11, panel driving electric power PDP is set at benchmark electric power RP.When work, in WT11, panel driving electric power PDP is set at target drives electric power PP11.In other words, target drives electric power PP11 modulation is become benchmark electric power RP and target drives electric power PP11.Similarly, target drives electric power PP12～P33 can be become benchmark electric power RP and target drives electric power PP12～P33 by modulation respectively.Preferably, the voltage of benchmark electric power RP is 0 volt.
As shown in Figure 3, in above-mentioned nine image time FT11～FT33, when driving with above-mentioned nine target drives electric power PP11～PP33 respectively, the variation relation figure that can produce panel legibility and time is shown in dashed curve.In Fig. 3,, indicate above-mentioned nine target drives electric power PP11～PP33 respectively in the dashed curve upper end especially in order more clearly to show the relation of panel legibility and target drives electric power.
Behind the modulation through panel driving electric power PDP, in above-mentioned nine image time FT11～FT33, when driving with benchmark electric power RP and target drives electric power PP11～PP33 respectively, the variation relation figure that can produce panel legibility and time is shown in solid-line curve.In Fig. 3, solid-line curve is in order to clearly to show the relation between panel legibility, benchmark electric power RP and the target drives electric power PP11～PP33.
In image time FT11, the dashed curve section that indicates PP11 adds the area of solid-line curve section after to time integral and is a target board vision legibility VB11; When benchmark electric power RP was 0 volt, the area of the solid-line curve section that indicates P11 after to time integral was an actual panel vision legibility RVB11.For image time FT11, after panel driving electric power PDP was become benchmark electric power RP and target drives electric power PP11 by target drives electric power PP11 modulation, the actual panel vision legibility RVB11 of gained can be less than target board vision legibility VB11.
As Fig. 4 and shown in Figure 5, if in above-mentioned nine image time FT11～FT33, the user is not when operating adjustment operation-interface 122 backlight and send backlight adjustment signals S2 to backlight driver 121, in image time FT11～FT33, backlight drive electric power BDP1 will remain on a default target backlight drive electric power BP; Therefore, in image time FT11～PFT33, the target vision legibility backlight VBBL11～VBBL33 that is obtained respectively after to time integral in image time FT11～FT33 in legibility backlight can be equal to each other.
In image time FT11, because actual panel vision legibility RVB11 can be less than the cause of target board vision legibility VB11, resulting one whole actual vision legibility will cause picture data to become darker in image time FT11 less than above-mentioned overall goals vision legibility after actual panel vision legibility RVB11 and target vision legibility backlight VBBL11 addition are taken advantage of.
Please continue to consult Fig. 6 and Fig. 7, Fig. 6 is in second application examples of prior art embodiment, and panel driving electric power, picture show the graph of a relation of time and image time; Fig. 7 is in second application examples of prior art embodiment, and panel legibility, picture show the graph of a relation of time and image time.Simultaneously, see also Fig. 1, Fig. 4 and Fig. 5.
As shown in the figure, in combining of black insertion technology and the Driving technique that exceeds the quata used, when image time FT11 is divided into a black plug when BT11 and exceeds the quata to drive apart from OT11.When black plug, in BT11, panel driving electric power PDP is set at benchmark electric power RP.In OT11, PDP is set at the driving electric OP11 that exceeds the quata with panel driving electric power when exceeding the quata to drive.In other words, target drives electric power PP11 modulation is become benchmark electric power RP and exceed the quata driving electric OP11.Similarly, target drives electric power PP12～P33 can be become benchmark electric power RP and exceed the quata driving electric OP12～OP33 by modulation respectively.Preferably, the voltage of benchmark electric power RP is 0 volt.
As shown in Figure 7, in above-mentioned nine image time FT11～FT33, when driving with above-mentioned nine target drives electric power PP11～PP33 respectively, the variation relation figure that can produce panel legibility and time is shown in solid-line curve.In Fig. 7,, indicate above-mentioned nine target drives electric power PP11～PP33 respectively in the solid-line curve upper end especially in order more clearly to show the relation of panel legibility and target drives electric power.
Behind the modulation through panel driving electric power PDP, in above-mentioned nine image time FT11～FT33, when driving with the driving electric OP11 that exceeds the quata～OP33 with benchmark electric power RP respectively, the variation relation figure that can produce panel legibility and time is shown in dashed curve.In Fig. 7, dashed curve is in order to clearly to show panel legibility, benchmark electric power RP and the relation between driving electric OP11～OP33 of exceeding the quata.
In image time FT11, the area of the solid-line curve section that indicates PP11 after to time integral is above-mentioned target board vision legibility VB11; When benchmark electric power RV was 0 volt, the area of the dashed curve section that indicates OP11 after to time integral was an actual panel vision legibility OVB11.For image time FT11, panel driving electric power PDP is being become benchmark electric power RP by target drives electric power PP11 modulation and exceeding the quata behind the driving electric OP11, the actual panel vision legibility OVB11 of gained usually still can be less than target board vision legibility VB11.In addition, must not be owing to exceeding the quata driving electric greater than a upper limit driving electric HLDP, so in each picture data, actual panel vision legibility usually still can be less than target board vision legibility.Similarly, in the driving of backlight 23, still follow Fig. 4 and parameter and content shown in Figure 5.
In image time FT11, because actual panel vision legibility OVB11 can be less than the cause of target board vision legibility VB11, resulting one whole actual vision legibility will cause picture data to become darker in image time FT11 less than above-mentioned overall goals vision legibility after actual panel vision legibility OVB11 and target vision legibility backlight VBBL11 addition are taken advantage of.
Because in above two application examples, therefore the whole actual vision legibility of ubiquity, can cause picture data to become darker in image time FT11 less than the problem of overall goals vision legibility.If will overcome this problem, then certainly will be by the user with manual mode of operation adjustment operation-interface 122 backlight, backlight drive electric power BDP1 is upwards increased by target backlight drive electric power BP, so that vision legibility backlight is upwards increased from target vision legibility backlight VBBL11.So, just, can derive two problems:
One only in order to make the wherein higher picture data of minority strokes overall goals vision legibility, just must increase backlight drive electric power BDP1 comprehensively, can cause the waste on the electric power.
Its two, must adjust backlight drive electric power BDP1 with manual mode of operation adjustment operation-interface 122 backlight by the user, very not convenient really in the use.
Summary of the invention
The technical matters that institute of the present invention desire solves is: overcome problem such as ubiquitous power wastage and operation inconvenience in the prior art.
For addressing the above problem, fundamental purpose of the present invention provides a kind of automatic backlight correction method of display, in actual panel vision legibility during less than target board vision legibility, automatically transmit a dim signal and increase backlight drive electric power automatically, presented so that picture data still is able to its predetermined overall goals vision legibility.
The invention discloses a kind of automatic backlight correction method of display, keep a picture data with a panel driving electric and a backlight drive electric power and shown with an overall goals vision legibility.This overall goals vision legibility takes advantage of the back to be formed by a target board vision legibility and the addition of target vision legibility backlight.This method utilizes black plug or black plug to add to exceed the quata a display panel of Driving technique driving display to provide an actual panel vision legibility for picture data; When actual panel vision legibility during less than target board vision legibility, can transmit a dim signal and increase backlight drive electric power automatically, so that target vision legibility backlight is increased automatically to revisal vision legibility backlight, after the addition of actual panel vision legibility and revisal vision legibility backlight is taken advantage of, picture data maintained with above-mentioned overall goals vision legibility shown.
The present invention is compared to the technology of existing display display image data, because in the automatic backlight correction method of display provided by the present invention, when actual panel vision legibility during less than target board vision legibility, can transmit a dim signal automatically and increase backlight drive electric power automatically, therefore, can impel picture data still to be able to its predetermined overall goals vision legibility is automatically presented.Apparently, because the present invention can needn't carry out above-mentioned adjustment by the mode of manual adjustment fully, so can significantly promote the convenience in the operation (use) and the display quality of picture data.
In addition, because the present invention can carry out the revisal of backlight drive electric power respectively to each stroke face data, therefore, needn't just must increase backlight drive electric power only in order to make the wherein higher picture data of minority strokes overall goals vision legibility comprehensively.Apparently, the present invention can save backlight drive electric power automatically and effectively, and the service time of long display.
Description of drawings
Fig. 1 is the functional block diagram of embodiment of the prior art;
Fig. 2 is in first application examples of prior art embodiment, and panel driving electric power, picture show the graph of a relation of time and image time;
Fig. 3 is in first application examples of prior art embodiment, and panel legibility, picture show the graph of a relation of time and image time;
Fig. 4 is in first application examples of prior art embodiment, and backlight drive electric power, picture show the graph of a relation of time and image time;
Fig. 5 is in first application examples of prior art embodiment, and legibility backlight, picture show the graph of a relation of time and image time;
Fig. 6 is in second application examples of prior art embodiment, and panel driving electric power, picture show the graph of a relation of time and image time;
Fig. 7 is in second application examples of prior art embodiment, and panel legibility, picture show the graph of a relation of time and image time;
Fig. 8 is the functional block diagram of preferred embodiment of the present invention;
Fig. 9 is in first application examples of preferred embodiment of the present invention, and panel driving electric power, picture show the graph of a relation of time and image time;
Figure 10 is in first application examples of preferred embodiment of the present invention, and panel legibility, picture show the graph of a relation of time and image time;
Figure 11 is in first application examples of preferred embodiment of the present invention, and backlight drive electric power, picture show the graph of a relation of time and image time;
Figure 12 is in first application examples of preferred embodiment of the present invention, and legibility backlight, picture show the graph of a relation of time and image time;
Figure 13 is in second application examples of preferred embodiment of the present invention, and backlight drive electric power, picture show the graph of a relation of time and image time;
Figure 14 is in the 3rd application examples of preferred embodiment of the present invention, and panel driving electric power, picture show the graph of a relation of time and image time;
Figure 15 is in the 3rd application examples of preferred embodiment of the present invention, and panel legibility, picture show the graph of a relation of time and image time;
Figure 16 is in the 3rd application examples of preferred embodiment of the present invention, and backlight drive electric power, picture show the graph of a relation of time and image time;
Figure 17 is in the 3rd application examples of preferred embodiment of the present invention, and legibility backlight, picture show the graph of a relation of time and image time;
Figure 18 is in the 4th application examples of preferred embodiment of the present invention, and backlight drive electric power, picture show the graph of a relation of time and image time; And
Figure 19 is the simple and easy process flow diagram of preferred embodiment of the present invention.
Wherein, Reference numeral:
100,300 electronic multimedia devices, 200 external image data
1 distributing board (PWB), 11 image processing circuits
111 microprocessing units, 112 image data bases
112a internal image data 113 image data transmitting/receiving interfaces
12 treatment circuit 121 backlight drivers backlight
122 adjustment operation-interface 123 key-press module backlights backlight
13 power supplys, 2,4 displays
21,41 panel drivers, 22,42 display panels
23,43 backlights, 3 distributing boards
31 microprocessing units, 311 panel driving electric power deployment unit
312 backlight drive power control units, 32 image data bases
321 internal image data, 33 image data transmitting/receiving interfaces
34 power supplys, 35 backlight drivers
36 adjustment operation-interface 37 key-press module backlights backlight
421 ruddiness pixel cells, 422 green glow pixel cells
423 blue light pixel cell S1, S1 ' shows signal
S2, S2 ' backlight adjustment signals S3 dim signal
WP1, WP2, WP1 ', WP2 ' power for operation VB11 target board vision legibility
PP11～PP33 target drives electric power PDP, PDP ' panel driving electric power
RP benchmark electric power OP11～OP33 driving electric that exceeds the quata
HLDP upper limit driving electric BDP1, BDP2 backlight drive electric power
BDP1 ', BDP2 ' backlight drive electric power BP target backlight drive electric power
CBP revisal backlight drive electric power CBP1, CBP2, CBP3 revisal backlight drive electric power
RVB11, OVB11 actual panel vision legibility PFT1～PFT3 picture shows the time
VBBL11～VBBL33 target vision legibility FT11 backlight～FT33 image time
CVBBL11～CVBBL33 revisal vision legibility backlight
CVBBL11 '～CVBBL33 ' revisal vision legibility backlight
Embodiment
Because the automatic backlight correction method of display provided by the present invention can be widely used in various displays, particularly be used in the panel type display, its combination embodiment is too numerous to enumerate especially, hold and do not give unnecessary details, only enumerate wherein preferred embodiment, and the starting condition of the equity of being carried among utilization and the prior art embodiment (picture data, target legibility, the picture that comprise equity show time and image time etc.) is in addition to as directed, highlighting value of the present invention, and the outstanding effect that possesses of checking the application.
See also Fig. 8 to Figure 12, Fig. 8 is the functional block diagram of preferred embodiment of the present invention; Fig. 9 is in first application examples of preferred embodiment of the present invention, and panel driving electric power, picture show the graph of a relation of time and image time; Figure 10 is in first application examples of preferred embodiment of the present invention, and panel legibility, picture show the graph of a relation of time and image time; Figure 11 is in first application examples of preferred embodiment of the present invention, and backlight drive electric power, picture show the graph of a relation of time and image time; Figure 12 is in first application examples of preferred embodiment of the present invention, and legibility backlight, picture show the graph of a relation of time and image time.As shown in the figure, an electronic multimedia device 300 can be in order to show at least one view data.
Display 4 comprises a panel driver 41, a display panel 42 and a backlight 43.Wherein, panel driver 41 is electrically connected at microprocessing unit 31, power supply 34 and display panel 42 respectively; Display panel 421 comprises a plurality of ruddiness pixel cells 421, a plurality of green glow pixel cell 422 and a plurality of blue light pixel cells 423; 43 of backlights are electrically connected at backlight driver 35.
In the practice utilization, display panel 42 can be a liquid crystal display (Liquid Crystal Display; LCD) panel.In addition, backlight 43 can be a light emitting diode (Light Emitting Diode; LED) backlight, a cold-cathode tube (Cold Cathode Fluorescent Lamp; CCFL) backlight or a thermionic-cathode tube (Hot Cathode Fluorescent Lamp; HCFL) backlight.
When electronic multimedia device 300 display image datas, must receive view data earlier, view data can be above-mentioned external image data 200, or is pre-stored in the internal image data 321 of image data base 32.Wherein, external image data 200 can be sent to microprocessing unit 31 via image data transmitting/receiving interface 33 by wired or wireless transmission manner, and 321 of internal image data directly are downloaded to microprocessing unit 31 from image data base 32.Microprocessing unit 31 can be handled view data, and image data analyzing is gone out many strokes face data, each picture data is included at least one target drives electric power in the Preset Time, calculate as panel driving electric PDP ' during for the panel driving electric power deployment unit 311 of microprocessing unit 31 for target drives electric power, panel driving electric power the target board vision legibility that can provide picture data.
Then, the panel driving electric power deployment unit 311 in the microprocessing unit 31 can transmit a shows signal S1 ' to panel driver 41 according to the target board vision legibility of each stroke face data.Generally speaking, in order to solve the problem of ghost, can adopt black insertion technology usually.That is, panel driver 41 can become at least one above-mentioned target drives electric power and at least one benchmark electric power less than target drives electric power with panel driving electric power PDP ' by target drives electric power modulation according to shows signal S1 ', provide the panel driving electric power PDP ' that is formed by target drives electric power and benchmark electric power to order about 34 pairs of display panels 42 of power supply, make display panel 42 provide an actual panel vision legibility for each picture data.Apparently, because the application of black insertion technology can cause actual panel vision legibility less than above-mentioned target board vision legibility.
Simultaneously, backlight driver 35 can order about power supply 34 and provide a backlight drive electric power BDP1 ' and another backlight drive electric power BDP2 ' to backlight 43 and key-press module backlight 37 respectively.Backlight drive electric power BDP1 ' can order about 43 pairs of display panels 42 of backlight and provide backlight, thinks that each picture data provides a vision legibility backlight.Backlight drive electric power BDP2 ' can order about 37 pairs of key-press modules of key-press module backlight (not indicating) and provide backlight.When the user thinks that vision legibility backlight is not enough, can send a backlight adjustment signals S2 ' to backlight driver 35 by operating adjustment operation-interface 36 backlight, increasing backlight drive electric power BDP1 ', and increase vision legibility backlight simultaneously.
Shown in Figure 9, a view data comprises three stroke face data, and three stroke face data show in three pictures show time (Presented Frame Time) PFT1～PFT3 respectively.The first stroke picture data is preset as panel driving electric power PDP ' three target drives electric power PP11～PP13 respectively in three image times (Frame Time) FT11～FT13, the second stroke face data are preset as panel driving electric power PDP ' three target drives electric power PP21～PP23 respectively in three image time FT21～FT23, the 3rd stroke face data are preset as panel driving electric power PDP ' three target drives electric power PP31～PP33 described in the prior art embodiment respectively in three image time FT31～FT33.
In the application of black insertion technology, when image time FT11 is divided into a black plug apart from BT11 and when work apart from WT11.When black plug, in BT11, panel driving electric power PDP ' is set at benchmark electric power RP.When work, in WT11, panel driving electric power PDP ' is set at target drives electric power PP11.In other words, target drives electric power PP11 modulation is become benchmark electric power RP and target drives electric power PP11.Similarly, target drives electric power PP12～P33 can be become benchmark electric power RP and target drives electric power PP12～P33 by modulation respectively.Preferably, the voltage of benchmark electric power RP is 0 volt.
As shown in figure 10, in above-mentioned nine image time FT11～FT33, when driving with above-mentioned nine target drives electric power PP11～PP33 respectively, the variation relation figure that can produce panel legibility and time is shown in dashed curve.In Figure 10,, indicate above-mentioned nine target drives electric power PP11～PP33 respectively in the dashed curve upper end especially in order more clearly to show the relation of panel legibility and target drives electric power.
Behind the modulation through panel driving electric power PDP ', in above-mentioned nine image time FT11～FT33, when driving with benchmark electric power RP and target drives electric power PP11～PP33 respectively, the variation relation figure that can produce panel legibility and time is shown in solid-line curve.In Figure 10, solid-line curve is in order to clearly to show the relation between panel legibility, benchmark electric power RP and the target drives electric power PP11～PP33.
In image time FT11, the dashed curve section that indicates PP11 adds the area of solid-line curve section after to time integral and is a target board vision legibility VB11; When benchmark electric power RP was 0 volt, the area of the solid-line curve section that indicates P11 after to time integral was an actual panel vision legibility RVB11.For image time FT11, after panel driving electric power PDP ' was become benchmark electric power RP and target drives electric power PP11 by target drives electric power PP11 modulation, the actual panel vision legibility RVB11 of gained can be less than target board vision legibility VB11.
Simultaneously, after microprocessing unit 31 calculates actual panel vision legibility RVB11, backlight drive power control unit 312 in the microprocessing unit 31 can calculate in image time FT11, when backlight drive electric power BDP1 ' was set at above-mentioned target backlight drive electric power BP, the backlight 43 of backlight drive electric power BDP1 ' driving display 4 was target vision legibility backlight VBBL11 that picture data provided.Apparently, target vision legibility backlight VBBL11 can utilize target backlight drive electric power BP that image time FT11 integration is obtained.Simultaneously, target vision legibility backlight VBBL11 and target board vision legibility VB11 addition are taken advantage of and are equaled overall goals vision legibility.
In addition, at actual panel vision legibility RVB11 during less than target board vision legibility VB11, microprocessing unit 31 can utilize overall goals vision legibility and actual panel vision legibility RVB11 to calculate revisal vision legibility backlight CVBBL11, still equals above-mentioned overall goals vision legibility after actual panel vision legibility RVB11 and revisal vision legibility backlight CVBBL11 addition are taken advantage of.
At this moment, the backlight drive power control unit 312 of microprocessing unit 31 can be according to the revisal vision legibility backlight CVBBL11 that is calculated, and calculate and produce the required revisal backlight drive electric power CBP of revisal vision legibility backlight CVBBL11, transmit a dim signal S3 according to this to backlight driver 35, backlight drive electric power BDP1 ' is increased from target backlight drive electric power BP be revisal backlight drive electric power CBP.Wherein, dim signal S3 can utilize the form of at least one instruction (Command) to be transmitted, and also can utilize the form of at least one control signal (Control Signal) to be transmitted.
Therefore, in image time FT11, vision legibility backlight can increase to revisal vision legibility backlight CVBBL11 automatically from target vision legibility backlight VBBL11.Similarly, in image time FT12～FT33, vision legibility backlight can increase respectively automatically to revisal vision legibility backlight CVBBL12～CVBBL33.
Those skilled in the art is to be understood that, on practice utilization aspect, panel driving electric power PDP ' also can drive above-mentioned a plurality of ruddiness pixel cell 421, a plurality of green glow pixel cell 422 and a plurality of blue light pixel cells 423 respectively, to produce above-mentioned actual panel vision legibility RVB11.In other words, above-mentioned actual panel vision legibility RVB11 can drive above-mentioned a plurality of ruddiness pixel cells 421, a plurality of green glow pixel cell 422 or a plurality of blue light pixel cell 423 by panel driving electric power PDP ' and be provided, and then utilize above-mentioned revisal technology backlight, corresponding revisal backlight drive electric power CBP is provided respectively.
See also Figure 13, in second application examples for preferred embodiment of the present invention, backlight drive electric power, picture show the graph of a relation of time and image time.As shown in the figure, different with above-mentioned first application examples is, in second application examples of preferred embodiment of the present invention, a kind of especially automatic black plug revisal technology backlight, with image time FT11 is example, when black plug during apart from BT11, backlight drive electric power BDP1 ' is made zero or reduces to a reference value; In when work during, this backlight drive electric power is increased to revisal backlight drive electric power CBP apart from WT11.By this, backlight 43 is utilized black insertion technology to show each stroke face data with display panel 42 synchronously, to reduce ghost and residual backlight.At all the other each image time FT12～FT33, also can utilize similar backlight automatic black plug revisal technology to carry out automatic revisal backlight.
See also Figure 14 to Figure 17, Figure 14 is in the 3rd application examples of preferred embodiment of the present invention, and panel driving electric power, picture show the graph of a relation of time and image time; Figure 15 is in the 3rd application examples of preferred embodiment of the present invention, and panel legibility, picture show the graph of a relation of time and image time; Figure 16 is in the 3rd application examples of preferred embodiment of the present invention, and backlight drive electric power, picture show the graph of a relation of time and image time; Figure 17 is in the 3rd application examples of preferred embodiment of the present invention, and legibility backlight, picture show the graph of a relation of time and image time.
The 3rd application examples of preferred embodiment of the present invention adopts the application that combines of black insertion technology and the Driving technique that exceeds the quata, when it is divided into a black plug with image time FT11 when BT11 and exceeds the quata driving (overdrive) apart from OT11.When black plug, in BT11, panel driving electric power PDP ' is set at benchmark electric power RP.In OT11, PDP ' is set at the driving electric OP11 that exceeds the quata with panel driving electric power when exceeding the quata to drive.In other words, with target drives electric power PP11 when the black plug apart from BT11 when exceeding the quata to drive apart from OT11 respectively modulation become benchmark electric power RP and exceed the quata driving electric OP11.Similarly, target drives electric power PP12～P33 can be become benchmark electric power RP and target drives electric power PP12～P33 by modulation respectively.Preferably, the voltage of benchmark electric power RP is 0 volt.
As shown in figure 15, in above-mentioned nine image time FT11～FT33, when driving with above-mentioned nine target drives electric power PP11～PP33 respectively, the variation relation figure that can produce panel legibility and time is shown in solid-line curve.In Figure 15,, indicate above-mentioned nine target drives electric power PP11～PP33 respectively in the solid-line curve upper end especially in order more clearly to show the relation of panel legibility and target drives electric power.
Behind the modulation through panel driving electric power PDP ', in above-mentioned nine image time FT11～FT33, when driving with the driving electric OP11 that exceeds the quata～OP33 with benchmark electric power RP respectively, the variation relation figure that can produce panel legibility and time is shown in solid-line curve.In Figure 15, dashed curve is in order to clearly to show panel legibility, benchmark electric power RP and the relation between driving electric OP11～OP33 of exceeding the quata.
In image time FT11, the area of the solid-line curve section that indicates PP11 after to time integral is a target board vision legibility VB11; When benchmark electric power RP was 0 volt, the area of the solid-line curve section that indicates OP11 after to time integral was an actual panel vision legibility OVB11.For image time FT11, panel driving electric power PDP ' is being become benchmark electric power RP by target drives electric power PP11 modulation and exceeding the quata behind the driving electric OP11, the actual panel vision legibility OVB11 of gained usually still can be less than target board vision legibility VB11.In addition, must not be owing to exceeding the quata driving electric greater than upper limit driving electric HLDP, so in each picture data, actual panel vision legibility usually still can be less than target board vision legibility.
Simultaneously, after microprocessing unit 31 calculates actual panel vision legibility OVB11, backlight drive power control unit 312 in the microprocessing unit 31 can calculate in image time FT11, when backlight drive electric power BDP1 ' was set at above-mentioned target backlight drive electric power BP, the backlight 43 of backlight drive electric power BDP1 ' driving display 4 was target vision legibility backlight VBBL11 that picture data provided.Apparently, target vision legibility backlight VBBL11 can utilize target backlight drive electric power BP that image time FT11 integration is obtained.Simultaneously, target vision legibility backlight VBBL11 and target board vision legibility VB11 addition are taken advantage of and are equaled overall goals vision legibility.
In addition, at actual panel vision legibility OVB11 during less than target board vision legibility VB11, microprocessing unit 31 can utilize overall goals vision legibility and actual panel vision legibility OVB 11 to calculate revisal vision legibility backlight CVBBL11 ', still equals above-mentioned overall goals vision legibility after actual panel vision legibility OVB11 and revisal vision legibility backlight CVBBL11 ' addition are taken advantage of.
At this moment, the backlight drive power control unit 312 of microprocessing unit 31 can be according to the revisal vision legibility backlight CVBBL11 ' that is calculated, and calculate and produce the required revisal backlight drive electric power CBP1 of revisal vision legibility backlight CVBBL11 ', transmit dim signal S3 according to this to backlight driver 35.Backlight drive electric power BDP1 ' is increased from target backlight drive electric power BP be revisal backlight drive electric power CBP1.Therefore, in image time FT11, vision legibility backlight can increase to revisal vision legibility backlight CVBBL11 ' automatically from target vision legibility backlight VBBL11.Similarly, in image time FT12 and FT13, backlight drive electric power BDP1 ' increases from target backlight drive electric power BP and is revisal backlight drive electric power CBP1, and vision legibility backlight can be increased respectively automatically to revisal vision legibility backlight CVBBL12 ' and CVBBL13 '.
Similarly, in image time FT21～FT23, backlight drive electric power BDP1 ' increases from target backlight drive electric power BP and is revisal backlight drive electric power CBP2, and vision legibility backlight can be increased respectively automatically to revisal vision legibility backlight CVBBL21 '～CVBBL23 '.In image time FT31～FT33, backlight drive electric power BDP1 ' increases from target backlight drive electric power BP and is revisal backlight drive electric power CBP3, and vision legibility backlight can be increased respectively automatically to revisal vision legibility backlight CVBBL31 '～CVBBL33 '.
Those skilled in the art is to be understood that, because in the automatic backlight correction method of display provided by the present invention, in image time FT11, as actual panel vision legibility RVB11 or OVB11 during less than target board vision legibility VB11, can transmit dim signal S3 automatically and increase backlight drive electric power BDP1 ' automatically, therefore, can impel picture data still to be able to its predetermined overall goals vision legibility is automatically presented.Apparently, because the present invention can needn't carry out above-mentioned adjustment by the mode of manual adjustment fully, so can significantly promote the convenience in the operation (use) and the display quality of picture data.
In addition, on the practice utilization aspect, revisal technology backlight provided by the present invention can be carried out subregion control and revisal at least one partial display area (local display panel 42 and local backlight 43) of display 4, also can carry out in whole viewing areas of display 4.In other words, control and the revisal of carrying out globality backlight that revisal technology backlight provided by the present invention not only can be provided backlight 43 also can backlightly be carried out zonal control and revisal to what backlight 43 was provided.
In addition, as Figure 15 and shown in Figure 16, because the present invention can be to each stroke face data, carry out the revisal of backlight drive electric power respectively, therefore, needn't just must increase backlight drive electric power only in order to make the wherein higher picture data of minority strokes overall goals vision legibility comprehensively.Apparently, the present invention can save backlight drive electric power automatically and effectively, and the service time of long display.
In addition, on practice utilization aspect, with image time FT11 is example, about black plug time BT11, working time WT11, the driving electric that exceeds the quata OP11, revisal backlight drive electric power CBP3, target board vision legibility VB11, target vision legibility backlight VBBL11, actual panel vision legibility RVB11 or OVB11, revisal vision legibility backlight CVBBL11 or isoparametric modulation of CVBBL11 ' and calculating, all can utilize the mode of Cha Chabiao (Look-up Table) contrast acquisition, sequential operation, logical circuit computing or its combination to be.
See also Figure 18, it is in the 4th application examples of preferred embodiment of the present invention, and backlight drive electric power, picture show the graph of a relation of time and image time.As shown in the figure, different with above-mentioned the 3rd application examples is in the 4th application examples of preferred embodiment of the present invention, especially above-mentioned backlight automatic black plug revisal technology to be combined with the black insertion technology and the Driving technique that exceeds the quata.With image time FT11 is example, when black plug during apart from BT11, backlight drive electric power BDP1 ' is made zero or reduces to a reference value; When exceeding the quata to drive, during apart from OT11, this backlight drive electric power is increased to revisal backlight drive electric power CBP1.By this, backlight 43 is utilized black insertion technology to show each stroke face data with display panel 42 synchronously, to reduce ghost and residual backlight.At all the other each image time FT12～FT33, also can utilize similar backlight automatic black plug revisal technology to carry out automatic revisal backlight.
Hold with above-mentioned, backlight 43 can be a light emitting diode (Light Emitting Diode; LED) backlight, a cold-cathode tube (Cold Cathode Fluorescent Lamp; CCFL) backlight or a thermionic-cathode tube (Hot Cathode Fluorescent Lamp; HCFL) backlight.It will be understood by those of skill in the art that above-mentioned backlight drive electric power BDP1 ' can be a backlight drive electric current when backlight 43 is the LED-backlit source.On the contrary, when backlight 43 was CCFL backlight or HCFL backlight, above-mentioned backlight drive electric power BDP1 ' then can be a backlight driving voltage.
At last, can more can effectively grasp technology contents of the present invention, below will provide a simple and easy process flow diagram, be converged whole technology contents of the present invention based on black insertion technology in order to make those skilled in the art.See also Figure 19, it is for the simple and easy process flow diagram of preferred embodiment of the present invention.As shown in the figure, when electronic multimedia device 300 display image datas, must receive the view data that institute's desire shows earlier, that is receive external image data 200 or internal image data 321 (step 110).Then, utilize the target drives electric power PP11～PP33 in each picture data to calculate in Preset Time, when panel driving electric power PDP ' is set at target drives electric power PP11～PP33, getable target board vision legibility (step 120).Wherein, the above-mentioned schedule time can be picture and shows time FPT1～FPT3, and picture shows that time FPT1～FPT3 equals at least two image times, in an embodiment, and the image time that the picture demonstration time equals three times.
Then, calculate in Preset Time, when backlight drive electric power BDP1 ' is set at target backlight drive electric power BP, resulting target vision legibility backlight (step 130); And target board vision legibility and the addition of target vision legibility backlight taken advantage of, to obtain overall goals vision legibility (step 140).
Then, with panel driving electric power BDP1 ' by target drives electric power modulation become target drives electric power PP11～PP33 with less than the benchmark electric power RP (step 150) of target drives electric power.Simultaneously, distance when distance was with work when Preset Time was divided into black plug, distance when black plug, panel driving electric power is set at benchmark electric power RP, distance when work, panel driving electric power is set at target drives electric power PP11～PP33, to finish the modulation (step 160) of panel driving electric.
Behind the modulation of finishing panel driving electric BDP1 ', calculate in Preset Time, during with benchmark electric power and target drives driven by power, resulting actual panel vision legibility.And actually, actual panel vision legibility can be less than target board vision legibility (step 170).And then, utilize actual panel vision legibility and overall goals vision legibility, calculate revisal vision legibility backlight, equal overall goals vision legibility (step 180) after the addition of actual panel vision legibility and revisal vision legibility backlight is taken advantage of.Simultaneously, calculate in Preset Time, produce the required revisal backlight drive electric power (step 190) of revisal vision legibility backlight.At last, sending dim signal S3 increases backlight drive electric power to revisal backlight drive electric power CBP (step 210) automatically from target backlight drive electric power BP
By the above embodiments as can be known, the value on the true tool industry of the present invention.Above embodiment explanation only is preferred embodiment explanation of the present invention, and those skilled in the art is when doing other all improvement and variation according to the above embodiment of the present invention explanation.Yet all improvement and variation that these are done according to the embodiment of the invention are in the claim that still belongs to invention spirit of the present invention and define.
Claims (30)
1. the automatic backlight correction method of a display, preestablish a Preset Time, utilize adjusting a panel driving electric and a backlight drive electric power controls at least one picture data and maintains an overall goals vision legibility and shown that the method includes the steps of:
(a) calculate in this Preset Time, when this panel driving electric power was set at a target board driving electric, a display panel of this this display of panel driving driven by power showed the resulting target board vision legibility of this picture data;
(b) calculate in this Preset Time, when this backlight drive electric power is set at a target backlight drive electric power, one backlight of this this display of backlight drive driven by power is the target that this picture data provided vision legibility backlight, and this target vision legibility backlight and this target board vision legibility addition are taken advantage of and equaled this overall goals vision legibility;
Distance when distance is with at least one work when (c) this Preset Time being divided at least one black plug, distance when this black plug, this panel driving electric power is set at the benchmark electric power less than this target drives electric power, distance when this work, this panel driving electric power is set at this target drives electric power, calculate an actual panel vision legibility of gained when showing this picture data according to this, and this actual panel vision legibility is less than this target board vision legibility with this benchmark electric power and this target drives driven by power;
(d) utilize this actual panel vision legibility and this overall goals vision legibility to calculate revisal vision legibility backlight, and this revisal vision legibility backlight and this actual panel vision legibility addition are taken advantage of equal this overall goals vision legibility;
(e) calculate in this Preset Time, produce the required revisal backlight drive electric power of this revisal vision legibility backlight, and send a dim signal this backlight drive electric power is increased to this revisal backlight drive electric power automatically from this target backlight drive electric power.
2. the automatic backlight correction method of display as claimed in claim 1, wherein, in this step (e), when this black plug apart from the time, this backlight drive electric power is made zero, when this work apart from the time, this backlight drive electric power is increased to this revisal backlight drive electric power.
3. the automatic backlight correction method of display as claimed in claim 1, wherein, this step (d) with (e) in, this revisal vision legibility backlight and this revisal backlight drive electric power utilize a Cha Chabiao and contrast acquisition.
4. the automatic backlight correction method of display as claimed in claim 1 wherein, carries out in a partial display area of this display.
5. the automatic backlight correction method of display as claimed in claim 1 wherein, carries out in whole viewing areas of this display.
6. the automatic backlight correction method of display as claimed in claim 1, wherein, this Preset Time is an image time.
7. the automatic backlight correction method of display as claimed in claim 1, wherein, this Preset Time is that a picture shows the time, and this picture demonstration time comprises at least two image times.
8. the automatic backlight correction method of display as claimed in claim 1, wherein, this display panel is a display panels.
9. the automatic backlight correction method of display as claimed in claim 1, wherein, this actual panel vision legibility is provided by a plurality of ruddiness pixel cells of this this display panel of panel driving driven by power.
10. the automatic backlight correction method of display as claimed in claim 1, wherein, this actual panel vision legibility is provided by a plurality of green glow pixel cells of this this display panel of panel driving driven by power.
11. the automatic backlight correction method of display as claimed in claim 1, wherein, this actual panel vision legibility is provided by a plurality of blue light pixel cells of this this display panel of panel driving driven by power.
12. the automatic backlight correction method of display as claimed in claim 1, wherein, this backlight is one of in a back light source in LED, a cold-cathode tube backlight and the thermionic-cathode tube backlight.
13. the automatic backlight correction method of display as claimed in claim 1, wherein, this dim signal utilizes the form of at least one instruction to be transmitted.
14. the automatic backlight correction method of display as claimed in claim 1, wherein, this dim signal utilizes the form of at least one control signal to be transmitted.
15. the automatic backlight correction method of display as claimed in claim 1, wherein, the voltage of this benchmark electric power is 0 volt.
16. the automatic backlight correction method of a display, preestablish a Preset Time, utilize adjusting a panel driving electric and a backlight drive electric power controls at least one picture data and maintains an overall goals vision legibility and shown that the method includes the steps of:
(a) calculate in this Preset Time, when this panel driving electric power was set at a target board driving electric, a display panel of this this display of panel driving driven by power showed the resulting target board vision legibility of this picture data;
(b) calculate in this Preset Time, when this backlight drive electric power is set at a target backlight drive electric power, one backlight of this this display of backlight drive driven by power is the target that this picture data provided vision legibility backlight, and this target vision legibility backlight and this target board vision legibility addition are taken advantage of and equaled this overall goals vision legibility;
When (c) this Preset Time being divided at least one black plug apart from at least one distance when exceeding the quata to drive, distance when this black plug, this panel driving electric power is set at the benchmark electric power less than this target drives electric power, distance when this exceeds the quata to drive, this panel driving electric power is set at a driving electric that exceeds the quata greater than this target drives electric power, calculate according to this with this benchmark electric power and this driving electric that exceeds the quata and drive an actual panel vision legibility of gained when showing this picture data, and this actual panel vision legibility is less than this target board vision legibility;
(d) utilize this actual panel vision legibility and this overall goals vision legibility to calculate a revisal vision legibility backlight, and this revisal vision legibility backlight and this actual panel vision legibility addition are taken advantage of equal this overall goals vision legibility;
(e) calculate in this Preset Time, produce the required revisal backlight drive electric power of this revisal vision legibility backlight, and send a dim signal this backlight drive electric power is increased to this revisal backlight drive electric power automatically from this target backlight drive electric power.
17. the automatic backlight correction method of display as claimed in claim 16, wherein, in this step (e), when this black plug apart from the time, this backlight drive electric power is made zero, when this exceeds the quata to drive apart from the time, this backlight drive electric power is increased to this revisal backlight drive electric power.
18. the automatic backlight correction method of display as claimed in claim 16, wherein, this step (d) with (e) in, this revisal vision legibility backlight and this revisal backlight drive electric power utilize a Cha Chabiao and contrast acquisition.
19. the automatic backlight correction method of display as claimed in claim 16 wherein, carries out in a partial display area of this display.
20. the automatic backlight correction method of display as claimed in claim 16 wherein, carries out in whole viewing areas of this display.
21. the automatic backlight correction method of display as claimed in claim 16, wherein, this Preset Time is an image time.
22. the automatic backlight correction method of display as claimed in claim 16, wherein, this Preset Time is that a picture shows the time, and this picture demonstration time comprises at least two image times.
23. the automatic backlight correction method of display as claimed in claim 16, wherein, this display panel is a display panels.
24. the automatic backlight correction method of display as claimed in claim 16, wherein, this actual panel vision legibility is provided by a plurality of ruddiness pixel cells of this this display panel of panel driving driven by power.
25. the automatic backlight correction method of display as claimed in claim 16, wherein, this actual panel vision legibility is provided by a plurality of green glow pixel cells of this this display panel of panel driving driven by power.
26. the automatic backlight correction method of display as claimed in claim 16, wherein, this actual panel vision legibility is provided by a plurality of blue light pixel cells of this this display panel of panel driving driven by power.
27. the automatic backlight correction method of display as claimed in claim 16, wherein, this backlight is one of in a back light source in LED, a cold-cathode tube backlight and the thermionic-cathode tube backlight.
28. the automatic backlight correction method of display as claimed in claim 16, wherein, this dim signal utilizes the form of at least one instruction to be transmitted.
29. the automatic backlight correction method of display as claimed in claim 16, wherein, this dim signal utilizes the form of at least one control signal to be transmitted.
30. the automatic backlight correction method of display as claimed in claim 16, wherein, the automatic backlight correction method of display as claimed in claim 16, wherein, the voltage of this benchmark electric power is 0 volt.
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