CN101620820A - Method and apparatus for regenerating video - Google Patents
Method and apparatus for regenerating video Download PDFInfo
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- CN101620820A CN101620820A CN200910126054A CN200910126054A CN101620820A CN 101620820 A CN101620820 A CN 101620820A CN 200910126054 A CN200910126054 A CN 200910126054A CN 200910126054 A CN200910126054 A CN 200910126054A CN 101620820 A CN101620820 A CN 101620820A
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Abstract
According to one embodiment of the present invention, in a video regenerating apparatus and a video display method, when inputting at least one of a peak illuminating value of a video signal inputted by a processing module (15), a ambient brightness, and change direction generated based on user operations, a brightness setting module (19) sets a brightness of illuminating light outputted from backlight, where the backlight is drive by a brightness set by a lamp drive module (5), a chrominance correction module (17) determines a correction value for correcting a chrominance of the video signal provided to a display device (1) based on the setting brightness, and displays the video on the display device according to output video inputted with the chrominance of the video signal corrected by the correction value determined by a color temperature correction and calculation module (13).
Description
Technical field
Video reproducing apparatus and image display method that the video that is provided by (for example) television broadcasting or network is regenerated is provided.
Background technology
In recent years, use the television equipment of liquid crystal panel to obtain popularizing fast.Therefore incidentally, than CRT (cathode-ray tube (CRT)), liquid crystal panel can reduce the weight and the degree of depth (thickness), has all adopted liquid crystal panel in many television equipments with giant-screen.
Now, being used in most liquid crystal panels in the television equipment, all to be configured to by utilizing (for example) be that the illumination light of the backlight emission of representative is regenerated to video with cold-cathode tube (fluorescent tube/discharge tube).Therefore, be well known that, when variation having taken place, regenerate the color (that is, tone (color itself), color and luster and shade fluctuation) of video from the illumination of illumination light backlight and colourity.Incidentally, about being widely used as lamp cold-cathode tube (fluorescent tube/discharge tube) backlight etc., well-known be only in the ticket reserving time after lighting (power connection) illumination increase fast and colour fluctuation.
Publication number be 2007-108285 Japanese patent application KOKAI public publish a kind of liquid crystal display, this equipment usage counter was counted the time that begins to experience from power initiation, changing the component ratio of each color signal, thereby compensate the fluctuation of output image colourity in response to count value (from starting the time of experience constantly).
Publication number be 2003-29690 Japanese patent application KOKAI public publish a kind of display device, this display device is measured the temperature as fluorescent light backlight, to proofread and correct shows signal in response to the temperature that measures.
Above-mentioned two open all only disclosures by liquid crystal display or the color of image in display device are proofreaied and correct are reduced power connection colourity influence backlight constantly, and they all do not mention the improvement of the picture quality that is subject to colourity backlight (brightness) (such as video illumination or room brilliancy or figure skin change in color) influence.
An object of the present invention is to provide a kind of video reproducing apparatus and a kind of image display method, wherein can the output image image quality or the output video that do not change of quality (dignity) owing to colourity influence backlight.
Summary of the invention
According to an aspect of the present invention, provide a kind of video reproducing apparatus, it is characterized in that comprising:
Display module, being configured to input has R signal, G signal and B signal with display video;
Lighting module, being configured to provides illumination light to display module;
Video processing module, be configured to will input vision signal be converted to R signal, G signal and the B signal that can show by display module, and extract the peak illumination (peak luminance) in the vision signal;
Driver module is configured to drive the display module display video based on the vision signal that provides from video processing module;
The brightness settings module, being configured to set based on any condition of peak illumination that is extracted by video processing module or input will be from the brightness of the illumination light of lighting module output;
The lighting module driver module is configured to drive lighting module based on the output of brightness settings module;
Colourity (chromaticity) correction module, being configured to determine to proofread and correct from video processing module based on the output of brightness settings module provides to the correcting value of the colourity of the vision signal of driver module; And
The color temperature correction computing module, being configured to use proofread and correct from video processing module from the correcting value of chromaticity correction module output provides to the colourity of the vision signal of driver module.
Other purposes of the present invention and advantage will be set forth in the following description, and partly become apparent from explanation, or understand by implementing the present invention.Objects and advantages of the present invention can be utilized the means that hereinafter particularly point out to realize with combination and obtain.
Description of drawings
Be incorporated into this accompanying drawing that also constitutes an instructions part and show embodiments of the invention, and describe one in detail with above-mentioned general description and the following examples and be used from explanation principle of the present invention.
Fig. 1 is the exemplary type diagrammatic sketch that is combined in the example of display module in the television receiver (video reproducing apparatus) and driver module (display control module) thereof according to an embodiment of the invention;
Fig. 2 illustrates according to an embodiment of the invention from the x colourity of the illumination light of output backlight and y colourity and from the curve map of the example of connecting the relation between the time that video reproducing apparatus shown in Figure 1 (television receiver) experienced;
Fig. 3 is the curve map of lighting the example of the relation between the time of being experienced input time that illustrates according to an embodiment of the invention from the x colourity of the illumination light of output backlight and y colourity and at least one each change that causes from the peak illumination of the ambient brightness of video reproducing apparatus shown in Figure 1, vision signal and operation that the user has carried out;
Fig. 4 is the curve map of lighting the example of the relation between the time of being experienced input time that illustrates according to an embodiment of the invention from the x colourity of the illumination light of output backlight and y colourity and at least one each change that causes from the peak illumination of the ambient brightness of video reproducing apparatus shown in Figure 1, vision signal and operation that the user has carried out;
Fig. 5 illustrates can eliminate about no matter when the time that each state experienced that occurs according to an embodiment of the invention and the example chart of chromaticity correction degree (correcting value) example that the colourity that causes changes when the illumination from the illumination light of output backlight changes, wherein, the illumination of illumination light changes according to the ambient brightness of video reproducing apparatus shown in Figure 1, peak illumination and user's operation (comprise and connect backlight electric power) of vision signal;
Fig. 6 illustrates correcting value according to an embodiment of the invention to from the illumination of the illumination light of the output backlight of video reproducing apparatus shown in Figure 1 and from the example chart of the example of the time that the input (changing indication) that the colourity of the illumination light of output backlight changes is experienced;
Fig. 7 illustrates correcting value according to an embodiment of the invention to from the illumination of the illumination light of the output backlight of video reproducing apparatus shown in Figure 1 and from the example chart of the example of the time that the input (changing indication) that the colourity of the illumination light of output backlight changes is experienced; And
Fig. 8 illustrates correcting value according to an embodiment of the invention to from the illumination of the illumination light of the output backlight of video reproducing apparatus shown in Figure 1 and from the example chart of the example of the time that the input (changing indication) that the colourity of the illumination light of output backlight changes is experienced.
Embodiment
Hereinafter, describe embodiments of the invention with reference to the accompanying drawings in detail.The parts that can be used as on software application, hardware and/or software module or the above computing machine (such as server) of each module of described system are realized herein.Although show each module separately, they can share in same lower floor logical circuit or the code some or all.
Fig. 1 is the exemplary diagram that the example of the display module that is combined in the television receiver and driver module (display control module) thereof is shown, wherein, television receiver receives the television broadcasting that provided with its video and the sound (audio frequency) of regenerating via for example space wave or optical fiber.
Display control unit among Fig. 1 comprises: liquid crystal driver module 11 is used for driving each pixel as the display device (television receiver) 1 of LCD MODULE 11 based on image information; Color temperature correction computing module 13 is used for providing to liquid crystal driver module 11 corrected value of the color that will be shown by each pixel; And back end processing module 15, be used for vision signal is offered color temperature correction computing module 13 (before correction).Incidentally, back end processing module 15 offers color temperature correction computing module 13 with vision signal (before correction) and the vision signal of input is analyzed with the histogram of acquisition about the illumination in the vision signal, thereby the peak illumination that will extract from histogram offers the backlight illumination determination module of introducing after a while 19.
Color temperature correction computing module 13 changes chromaticity correction module 17 with time backlight and is connected, and the time backlight changes the chromaticity correction module according to the colourity of proofreading and correct the vision signal that offers liquid crystal driver module 11 for backlight 3 illumination (brightness) variation of display device 1 illumination.Incidentally, backlight 3 drive by lamp driver module (that is, inverter 5).
Yet in the following description, time backlight changes chromaticity correction module 17 and is connected with the backlight illumination determination module 19 that can change backlight 3 illumination arbitrarily.Time backlight changes chromaticity correction module 17 and also imports the peak illumination that has by back end processing module 15 detected vision signals.
Although unspecified, (for example) maybe when from the operating portion input control signal, backlight illumination determination module 19 is imported the indication relevant for backlight 3 brightness according to the operation of the telepilot of being carried out by the user (remote terminal).For example, backlight illumination determination module 19 input has by backlight 3 the brightness that is located at that ambient light sensor 7 detected ambient brightnesss around the display device 1 set.Promptly, backlight illumination determination module 19 input has the peak illumination (illumination of vision signal) that provided by back end processing module 15, backlight 3 the brightness that is set by the user and based on backlight 3 brightness by ambient light sensor 7 detected ambient brightnesss, thereby determined the controlled quentity controlled variable of proofreading and correct to the colourity of the vision signal of liquid crystal driver module 11 to providing, therefore, the video that exports display device 1 to is not subjected to from the illumination of the light of 3 outputs backlight and the influence of colour fluctuation.In this case, the information in the backlight illumination determination module 19 of being input to can comprise at least a in the peak illumination of above-mentioned ambient brightness, vision signal and user's the operation, and the deterioration of the quality of output video certainly suppresses by at least two of importing in these items of information.
Incidentally, as mentioned above, in color temperature correction computing module 13, the corrected value that is used for correcting video signal (R, G, B) (Rdrv, Gdrv, Bdrv) that use changes 17 settings of chromaticity correction module by the time backlight comes according to the controlled quentity controlled variable by 19 settings of backlight illumination determination module, to carrying out correction from the vision signal before the correction of back end processing module 15 (R, G, B).
Although do not describe in detail, for example, but, by the transmission provider by broadcasting station (broadcaster) or cable tv broadcast etc. being provided and receiving and will in tuning, carry out the vision signal that tuning program (title) is decoded and obtained via antenna, or by in back end processing module 15, being carried out signal Processing and vision signal being converted to R (red component) signal of the form that is suitable for display device 1 (that is liquid crystal panel) to being stored in the decode vision signal that obtains of title in the memory module, G (green component) signal, and B (blue component) signal.
According to the chromaticity correction value (Rdrv, Gdrv, Bdrv) that changes 17 outputs of chromaticity correction module from time backlight color temperature correction computing module 13 to from the R signal of back end processing module 15 outputs, G signal, and after the B signal proofreaies and correct, they are provided to liquid crystal driver module 11.
Now, extremely shown in Figure 4 as Fig. 2, known to being colourity (that is, x colourity and y colourity) disappearance in time and variation immediately fast behind the power supply of connection backlight 3 of backlight 3 illumination light of exporting of representative with cold-cathode tube (fluorescent tube/discharge tube), they are then slowly variation in the time of reservation.At every turn with the peak illumination of ambient brightness, vision signal be used for changing when at least one of user's operation of the illumination of the illumination light of 3 outputs backlight inputs to aforesaid backlight illumination determination module 19, all change to some extent with the illumination of the illumination light of output at that time from the illumination (brightness) of the illumination light of 3 outputs backlight.That is,, but still can fluctuate this image information of differently regenerating according to illumination from backlight 3 illumination light even are same video signal from the image information of liquid crystal driver module 11.
As shown in Figure 5, in view of about this background of each state from the illumination light colourities of 3 outputs backlight, comprise in indication before the illumination light illumination change of energized (connecting backlight 3 power supply) (promptly, before variation), and in the variation of having indicated illumination light illumination (promptly, after variation), change the corrected value (Rdrv that is ready to use in the chromaticity correction module 17 in the time backlight, Gdrv, Bdrv) (for example) is as LUT (form), thereby no matter when in input environment brightness, during in the peak illumination of vision signal and the user operation at least one, can eliminate the time dependent variation of colourity, and can be no matter when when sending change from the indication (being input to the variation of backlight illumination determination module 19) of the illumination change of backlight 3 illumination light, carry out further correction (such as Fig. 6 to shown in Figure 8) based on the time of being experienced from last variation indication input, thereby can suppress next with different conditions reproduced picture information according to colour fluctuation from backlight 3 illumination light.
For example, according to the LUT shown in Fig. 5, for example, with during 80% level (correcting value " the P ") driving, need 60% level after room brilliancy changes and lighting (energized) backlight 3, then correcting value becomes " N ".Incidentally, correcting value shown in Figure 5 becomes " Y " from " A " can adopt similar digital value, but they all are different certainly on principle.
Next, use a LUT shown in Figure 5 to specify (selection) the 2nd LUT, in the 2nd LUT, prepared as Fig. 6 to each corrected value (Rdrv, Gdrv, Bdrv) (having prepared 25 values) shown in Figure 8 corresponding to the correcting value in this application " A " to " Y ", no matter when when the input from the illumination of the illumination light of 3 outputs backlight changed, the colourity that is changed 17 pairs of vision signals of chromaticity correction module (R, G, B) by the time backlight was proofreaied and correct.For example, when the input from the illumination of the illumination light of 3 outputs backlight changes, colourity about vision signal (R, G, B), according to the 2nd LUT shown in Figure 6, at the time point place that has experienced 15 seconds, Rdrv is set to 110%, and Gdrv is set to 100% (not being corrected), and Bdrv is set to 90%.Afterwards, passed through certain hour section time point place, for example passed through the time point of 600 seconds (10 minutes) from energized, Rdrv is set to 103%, and Gdrv is set to 100% (not changing), and Bdrv is set to 97%.For example, when the input from the illumination of the illumination light of 3 outputs backlight changes, colourity about vision signal (R, G, B), according to the 2nd LUM shown in Figure 7, Rdrv is set at 107% by (from 108%), Gdrv is retained as 100% (not being corrected), and Bdrv is set at 93% by (from 92%).When the input from the illumination of the illumination light of 3 outputs backlight changes, colourity about vision signal (R, G, B), according to the 2nd LUT shown in Figure 8, at the time point place that has experienced 15 seconds, Rdrv is set at 102% by (from 103%), Gdrv is retained as 100% (not being corrected), and Bdrv is set at 98% by (from 97%).
Next, with reference to Fig. 1 the operation of carrying out is described when backlight illumination changes.
Can be according to user's indication consciously or based on automatically changing backlight 3 brightness by ambient light sensor 7 detected ambient brightnesss, or change brightness backlight arbitrarily according to the peak illumination of video information or according to these items of information.In many cases, in backlight illumination determination module 19, comprehensively determine to determine backlight 3 brightness according to these items of information.
For example, when the environment (zone) that display device 1 is installed is dark, preferably limit backlight 3 brightness (it is set to bright environmental facies darker).Similarly, when video information comprises many dark relatively vision signals, preferably limit backlight 3 brightness.Certainly, when importing by the user when having specified certain luminance, reflection is according to the correction of carrying out based on the brightness of above-mentioned installation environment and according to the correction of carrying out based on the brightness of video information in the brightness of indication.
Thereby, when even the brightness when backlight 3 has changed, also can change in the chromaticity correction module 17 and carry out the correction of passing in time and changing about colourity according to the LUT (the 2nd LUT) shown in LUT shown in Figure 5 (LUT) and Fig. 6 to Fig. 8 in the time backlight.
That is, even change from the brightness of backlight 3 illumination light of exporting, but because the colourity variation takes place in video output (regeneration video), so improved the quality of output video.Owing to change in the chromaticity correction module 17 according to the peak illumination of input environment brightness, vision signal and at least one the time point (time point that comprises power connection) in user's operation in time backlight the colourity of vision signal (R, G, B) proofreaied and correct, therefore the colourity that always suppresses output video changes, thereby has prevented output video quality deterioration (having improved quality).
Especially, improved the picture quality (such as personage's the colour of skin) that is subject to the backlight illumination influence.
Incidentally, a LUT shown in Figure 5 and Fig. 6 can make the firmware that the time backlight changes chromaticity correction module 17 to the 2nd LUT shown in Figure 8, and perhaps they can be to be connected to time variation chromaticity correction module 17 backlight or the like storer (not shown).
As mentioned above, by using each embodiment, when having imported the peak illumination of ambient brightness, vision signal and in user's operation at least one when no matter when, the colourity variation that can proofread and correct regeneration (output) video, thereby suppressed variation, therefore improved the quality of wanting output video.Especially, can suppress to be subject to the quality deterioration of the image (such as personage's the colour of skin) of backlight illumination influence.
Those skilled in the art will readily recognize that other advantage and improvement.Therefore, the present invention its be not limited to aspect wideer detail and herein shown in and described representative embodiment.Therefore, under the condition of the spirit or scope that do not deviate from the total inventive concept that limits by claims machine equivalent, can carry out various improvement to the present invention.
Claims (9)
1. a video reproducing apparatus is characterized in that, comprising:
Display module, being configured to input has R signal, G signal and B signal with display video;
Lighting module, being configured to provides illumination light to described display module;
Video processing module, be configured to will input vision signal be converted to described R signal, described G signal and the described B signal that can show by described display module, and extract the peak illumination in the described vision signal;
Driver module is configured to drive described display module display video based on the vision signal that provides from described video processing module;
The brightness settings module is configured to set from the brightness of the illumination light of described lighting module output based on any condition of described peak illumination that is extracted by described video processing module or input;
The lighting module driver module is configured to drive described lighting module based on the output of described brightness settings module;
The chromaticity correction module is configured to determine the correcting value proofreaied and correct to the colourity of the vision signal of described driver module providing from described video processing module based on the output of described brightness settings module; And
The color temperature correction computing module is configured to use from the described correcting value of described chromaticity correction module output and proofreaies and correct providing from described video processing module to the colourity of the vision signal of described driver module.
2. video reproducing apparatus according to claim 1, it is characterized in that, light the time of being experienced in response to having changed from the time of the brightness of the illumination light of described lighting module output from the time point of the power supply of connecting described lighting module or by described brightness settings module, the correcting value proofreaied and correct to the colourity of the vision signal of described driver module providing from described video processing module is provided described chromaticity correction module.
3. video reproducing apparatus according to claim 1, it is characterized in that, when having changed brightness from the illumination light of described lighting module output by described brightness settings module, described chromaticity correction module responds is identified for the correcting value proofreaied and correct to the colourity of the vision signal of described driver module providing from described video processing module in light the time of being experienced from the time that changes.
4. video reproducing apparatus according to claim 1, it is characterized in that, no matter when when the peak of the vision signal that is extracted by described video processing module illumination change, described chromaticity correction module responds is determined the correcting value proofreaied and correct to the colourity of the vision signal of described driver module providing from described video processing module in light the time of being experienced from the time that changes.
5. video reproducing apparatus according to claim 1, it is characterized in that, no matter when when the variation of the brightness around the described display module is imported in the described brightness settings module, described chromaticity correction module responds is identified for the correcting value proofreaied and correct to the colourity of the vision signal of described driver module providing from described video processing module in light the time of being experienced from the time that changes.
6. video reproducing apparatus according to claim 3, it is characterized in that, no matter when when the variation from the brightness of the illumination light of described lighting module output is imported into the described brightness settings module, described chromaticity correction module responds is identified for the correcting value proofreaied and correct to the colourity of the vision signal of described driver module providing from described video processing module in light the time of being experienced from the time that changes.
7. video reproducing apparatus according to claim 1, it is characterized in that, no matter when during when the fluctuation of the peak illumination that extracts the vision signal of extracting by described video processing module, no matter when during when the variation of the ambient brightness of having imported described display module or no matter when during when the variation imported from the brightness of the illumination light of described lighting module output, the correcting value proofreaied and correct to the colourity of the vision signal of described driver module providing from described video processing module is provided described chromaticity correction module.
8. a video refresh memory method is characterized in that, comprising:
From vision signal, extract the fluctuation of the peak illumination of the vision signal of importing;
No matter when, set from the brightness of the illumination light of described lighting module output when the fluctuation that detects peak illumination or input during from the variation indication of the brightness of the illumination light of lighting module output;
Drive described lighting module with the brightness of setting;
No matter when during, be identified for the correcting value of proofreading and correct to the colourity of the vision signal of display module providing when the variation indication of the brightness of input illumination light;
Use determined correcting value to come the colourity of vision signal of input is proofreaied and correct; And
Make described display module display video based on the vision signal after proofreading and correct.
9. video refresh memory method according to claim 8, it is characterized in that, no matter when during, during the variation of the brightness of the illumination light no matter when during when the variation of the ambient brightness of the described display module of input or no matter when exported from described lighting module when input, determine the correcting value of the colourity of vision signal when the fluctuation of the peak illumination that extracts vision signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008171605 | 2008-06-30 | ||
| JP2008171605 | 2008-06-30 |
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| CN101620820A true CN101620820A (en) | 2010-01-06 |
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| CN200910126054A Pending CN101620820A (en) | 2008-06-30 | 2009-03-04 | Method and apparatus for regenerating video |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543035A (en) * | 2010-12-15 | 2012-07-04 | 索尼公司 | Display apparatus and display apparatus driving method |
| CN102572452A (en) * | 2010-12-23 | 2012-07-11 | 康佳集团股份有限公司 | Method and device for adjusting color temperature of LED (Light Emitting Diode) liquid crystal television |
| CN102654992A (en) * | 2011-03-04 | 2012-09-05 | 富士通天株式会社 | Image processing apparatus |
-
2009
- 2009-03-04 CN CN200910126054A patent/CN101620820A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543035A (en) * | 2010-12-15 | 2012-07-04 | 索尼公司 | Display apparatus and display apparatus driving method |
| CN102572452A (en) * | 2010-12-23 | 2012-07-11 | 康佳集团股份有限公司 | Method and device for adjusting color temperature of LED (Light Emitting Diode) liquid crystal television |
| CN102654992A (en) * | 2011-03-04 | 2012-09-05 | 富士通天株式会社 | Image processing apparatus |
| CN102654992B (en) * | 2011-03-04 | 2015-02-11 | 富士通天株式会社 | Image processing apparatus |
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Open date: 20100106 |