CN101625476A - Liquid crystal display, back light module, control device and method thereof - Google Patents
Liquid crystal display, back light module, control device and method thereof Download PDFInfo
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- CN101625476A CN101625476A CN200810136079A CN200810136079A CN101625476A CN 101625476 A CN101625476 A CN 101625476A CN 200810136079 A CN200810136079 A CN 200810136079A CN 200810136079 A CN200810136079 A CN 200810136079A CN 101625476 A CN101625476 A CN 101625476A
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Abstract
The invention relates to a liquid crystal display, a back light module, a control device and a method thereof. The control method of the back light module is suitable for controlling at least one first light source group in all light source groups in the back light module, wherein the first light source group is used for providing a light source required by pixels in a certain specific area of a liquid crystal display panel. The control method of the back light module comprises the following steps: firstly, receiving the original gray-scale values of back light of three colors of red, green and blue; secondly, determining a substrate gray scale adjustment value according to the original gray-scale values of the back light of the three colors of the red, the green and the blue; thirdly, obtaining the adjustment gray-scale values of the back light of the three colors of the red, the green and the blue according to the original gray-scale values of the back light of the three colors of the red, the green and the blue and the substrate gray scale adjustment value; and finally, driving a first light source, a second light source, a third light source and a white light source in the first light source group respectively according to the adjustment gray-scale values of the back light of the three colors of the red, the green and the blue and the substrate gray scale adjustment value.
Description
Technical field
The present invention relates to a kind of plane display technique, and particularly relate to a kind of control method and device of backlight liquid crystal display module.
Background technology
Generally speaking; for will be with high dynamic range (high dynamic range; when HDR) display technique is applied to LCD (LCD); usually the gray-scale value of each group colored backlight in the light-emitting diode (LED) backlight module (LED backlightmodule) (that is red backlight, green colored backlights is with blue backlight) can be done regional control simultaneously, promote the dynamic range and the demonstration contrast of the original image of LCD thus.
Yet, because LCD is presenting under the condition of same brightness, utilization is supplied red simultaneously, green, the power that light-emitting diode (LED) backlight module consumed of the blue three looks white backlight that blendes together backlight can come highly more than the backlight module of only supplying white backlight merely, so what can know by inference is, general power efficiency (power efficiency) of only supplying the backlight module of white backlight can be supplied red than simultaneously, green, the power efficiency of the light-emitting diode (LED) backlight module that blue three looks backlight is come highly, but utilizes whole colour gamut that the LCD of the backlight module of only supplying white backlight can present but can Billy red with supplying simultaneously, green, the whole colour gamut that the LCD of the light-emitting diode (LED) backlight module that blue three looks backlight can present is come lowly.
Also also because of like this, utilize the LCD of the backlight module of only supplying white backlight just must sacrifice presenting of its whole colour gamut, and utilize the LCD of supplying red, green, blue three looks light-emitting diode (LED) backlight module backlight simultaneously just must sacrifice the power efficiency of its backlight module, and the existing technology that does not cause both advantages to have concurrently exists.
Summary of the invention
In view of this, purpose of the present invention just provides a kind of backlight module and control method and device, and it can reach the purpose of the whole colour gamut that the power efficiency of taking into account backlight module simultaneously and LCD can present.
Another object of the present invention just provides a kind of LCD, has backlight module and control device thereof that the invention described above proposes in this LCD, promotes the dynamic range of the image that it presented thus more and shows contrast.
Based on above-mentioned and other purpose, the invention provides a kind of backlight module, it comprises a plurality of light sources, and each light sources is in order to the required light source of pixel of a certain specific region that display panels is provided, and each light sources comprises first light source, secondary light source, the 3rd light source, and white light source.First light source can be driven according to red adjustment gray-scale value backlight; Secondary light source can be adjusted gray-scale value and is driven according to green colored backlights; The 3rd light source can be driven according to blue adjustment gray-scale value backlight; And white light source can be driven according to substrate gray scale adjusted value.
In one embodiment of this invention, first, second and third light source can produce white light source, and described substrate gray scale adjusted value can be determined by red, green and blue three looks initial gray-scale value backlight, and described red, green, blue three looks adjustment gray-scale value backlight can be determined by described red, green and blue three looks initial gray-scale value backlight and described substrate gray scale adjusted value.
From another viewpoint, the present invention proposes a kind of backlight module control method, it is suitable for controlling first light sources of at least one in all light sources in the backlight module proposed by the invention, wherein, this first light sources is in order to the required light source of pixel of a certain specific region that display panels is provided, and backlight module control method proposed by the invention comprises the following steps: at first, receives red, green, blue three looks initial gray-scale value backlight.
Then, decide substrate gray scale adjusted value according to described red, green, blue three looks initial gray-scale value backlight.Afterwards, according to described red, green, blue three looks initial gray-scale value backlight and described substrate gray scale adjusted value, obtain red, green, blue three looks adjustment gray-scale value backlight.At last, foundation described red, green, blue three looks adjustment gray-scale value backlight and described substrate gray scale adjusted value drive first, second, third and white light source in described first light sources respectively.
In one embodiment of this invention, obtained after the gray-scale value of described red, green and blue three looks initial gray-scale value backlight by all pixels of the described specific region of analysis, and the mean value of the red gray-scale value of all pixels that described redness initial gray-scale value backlight is described specific region, the initial gray-scale value of described green colored backlights are the mean value of green gray-scale value of all pixels of described specific region, and the mean value of the blue gray-scale value of all pixels that described blueness initial gray-scale value backlight is described specific region.
In one embodiment of this invention, described red, green and blue three looks adjustment gray-scale value backlight is obtained after distinctly subtracting each other with described substrate gray scale adjusted value by described red, green and blue three looks initial gray-scale value backlight.
Again from another viewpoint, the invention provides a kind of backlight module control device, it is suitable for controlling at least one first light sources of all light sources in the backlight module proposed by the invention, wherein, this first light sources is in order to the required light source of pixel of a certain specific region that display panels is provided, and backlight module control device provided by the present invention comprises image analysing computer processor, converting unit, and the backlight module controller.Wherein, the image analysing computer processor is in order to provide red, green, blue three looks initial gray-scale value backlight.
Converting unit couples the image analysing computer processor, in order to determine substrate gray scale adjusted value according to described red, green, blue three looks initial gray-scale value backlight, and, obtain red, green, blue three looks adjustment gray-scale value backlight according to described red, green, blue three looks initial gray-scale value backlight and described substrate gray scale adjusted value.The backlight module controller couples converting unit and described first light sources, in order to drive first, second, third and white light source in described first light sources respectively according to described red, green, blue three looks adjustment gray-scale value backlight and described substrate gray scale adjusted value.
From another viewpoint, the invention provides a kind of LCD again, it comprises in order to the display panels of show image picture, backlight module proposed by the invention, and backlight module control device proposed by the invention.
In an embodiment of the invention described above, described first light source is that red light emitting diodes, described secondary light source are that green LED, described the 3rd light source are blue LED, and described white light source is a white light-emitting diode, and described first, second, third and white light source can be arranged in a two-dimensional matrix.In addition, green, white dichromatism light emitting diode can be arranged in the diagonal position in the two-dimensional matrix.
In an embodiment of the invention described above, the image analysing computer processor causes the backlight module controller can drive the white light-emitting diode of described first light sources according to the product of described substrate adjustment gray-scale value and described yield value also in order to provide a yield value to converting unit thus.
In an embodiment of the invention described above, the mean value of the red gray-scale value of all pixels that described redness initial gray-scale value backlight is described specific region, the initial gray-scale value of described green colored backlights are the mean value of green gray-scale value of all pixels of described specific region, and the mean value of the blue gray-scale value of all pixels that described blueness initial gray-scale value backlight is described specific region.
In an embodiment of the invention described above, described substrate gray scale adjusted value is smaller or equal to the minimum value person in the described red, green, blue three looks initial gray-scale value backlight.
In an embodiment of the invention described above, according to CIE1931XYZ color standard system, the chromatic value x of described red, green, blue Tricolor LED deducts the absolute value of the chromatic value x of described white light-emitting diode can be less than 3%, and the chromatic value y of described red, green, blue Tricolor LED deduct the absolute value of the chromatic value y of described white light-emitting diode also can be less than 3%.
Because each group colored backlight of backlight module provided by the present invention all has four looks (that is red, green, blue, Bai Sise backlight) backlight, it is different from three traditional looks (that is red, green, blue three looks backlight) backlight and monochromatic (that is white backlight) backlight, and select the substrate that minimum value person in the red, green, blue three looks initial gray-scale value backlight is used as white backlight and adjust gray-scale value, and replace minimum value person in the red, green, blue three looks gray-scale value backlight by white backlight.Therefore, backlight module provided by the present invention and control method thereof and device just can realize taking into account simultaneously the power efficiency of backlight module and the purpose of the whole colour gamut that LCD can present.
In addition, owing to have backlight module and the control device thereof that the invention described above proposes in the LCD proposed by the invention, the dynamic range of the image that it presented and demonstration contrast can be raised thus again.Moreover, owing to the brightness of white backlight more can be raised according to the product that a gray-scale value and a yield value are adjusted in its substrate, so LCD provided by the present invention can present the image of spike brightness thus.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, the preferred embodiments of the present invention cited below particularly, and conjunction with figs. is elaborated as follows.
Description of drawings
Fig. 1 shows the system chart of the LCD of one embodiment of the invention.
Fig. 2 shows the block diagram of the backlight module control device of one embodiment of the invention.
Fig. 3 shows the process flow diagram of the backlight module control method of one embodiment of the invention.
[main element symbol description]
100: LCD
101: display panels
103: backlight module
103a: light sources
105: the backlight module control device
107: time schedule controller
109: gate drivers
111: source electrode driver
201: the image analysing computer processor
203: converting unit
205: the backlight module controller
R, G, B, W: light emitting diode
VS: vision signal
IMGD: image data
A: a certain zone of display panels
S301～S307: each step of the process flow diagram of the backlight module control method of one embodiment of the invention
Embodiment
The purpose that the present invention desired to reach is for taking into account the power efficiency of backlight module and the whole colour gamut that LCD can present simultaneously, and then the dynamic range of the image that promotes LCD again and presented and demonstration contrast and the purpose that presents the brightness of image spike.And following content will be described in detail at technical characterictic of the present invention and the effect desiring to reach, considers and examines to offer those skilled in the relevant art of the present invention.
Fig. 1 shows the system chart of the LCD 100 of one embodiment of the invention.With reference to Fig. 1, LCD 100 comprises display panels (LCD panel) 101, backlight module (backlightmodule) 103, backlight module control device (backlight module control device) 105, time schedule controller (timing controller, T-con) 107, gate drivers (gate driver) 109, and source electrode driver (Source driver) 111.Wherein, gate drivers 109 is controlled by time schedule controller 107, comes to open one by one each the row pixel (not shown) in the display panels 101 thus.
The whole colour gamut that can present for the power efficiency that will take into account backlight module 103 simultaneously and 100 of LCD.The present invention at first proposes to be different from traditional backlight Module Design mode.In the present embodiment, backlight module 103 comprises a plurality of light sources 103a, and each light sources 103a has first light source (red), secondary light source (green), the 3rd light source (indigo plant), white light source (in vain) four look light emitting diode R, G, B, W.Also also because of so, the advantage that the backlight module 103 that present embodiment provided just can have traditional backlight module of only supplying white backlight concurrently and supply red, green, blue three looks light-emitting diode (LED) backlight module backlight simultaneously is in wherein.
Moreover, in the present embodiment, the red, green, blue of each light sources 103a, Bai Sise light emitting diode R, G, B, W can be arranged in a two-dimensional matrix (two-dimension matrix), and green, white dichromatism light emitting diode G, W can be arranged in the diagonal position in this two-dimensional matrix, but should be not as restriction according to spirit of the present invention.
Based on as can be known above-mentioned, because the design of the backlight module 103 of present embodiment is different from traditional backlight Module Design mode, therefore, in order to want to drive the backlight module 103 of present embodiment, reach the technical purpose that institute of the present invention desire realizes thus, even if the backlight module control device 105 of present embodiment becomes the important role that the present invention is.
Fig. 2 shows the block diagram of the backlight module control device 105 of one embodiment of the invention.Merging is with reference to Fig. 1 and Fig. 2, the backlight module control device 105 of present embodiment is suitable for controlling at least one the light sources 103a in the backlight module 103, the light sources of the 103a that indicates among Fig. 1 for example, and in order to want to be illustrated more clearly in spirit of the present invention, following content will be that example is done explanation with the single light source group earlier, but earlier explanation is, backlight module control device 105 is all light sources in the controlling back light module 103 also.
Light sources 103a is in order to the required light source of pixel of a certain specific region (for example regional A in the display panels 101 of Fig. 1) that display panels 101 is provided, and the backlight module control device 105 of present embodiment comprises image analysing computer processor 201, converting unit 203, and backlight module controller 205.Wherein, image analysing computer processor 201 provides to the gray-scale value of all pixels of described specific region A in order to receive and to analyze, and obtains red, green, blue three looks initial gray-scale value backlight thus.What deserves to be mentioned is at first that at this image analysing computer processor 201 also can provide red, green, blue three looks of being supplied by external device (ED) (not illustrating) initial gray-scale value backlight.
In the present embodiment, extraneous vision signal (video signal) VS that is provided can be provided for image analysing computer processor 201, and analyzes according to this promptly to produce later and image data (image data) IMGD that provides to the pixel value of all pixels of display panels 101 is provided gives time schedule controller 107.Also also because of so,, obtain red, green, blue three looks initial gray-scale value backlight thus even if image analysing computer processor 201 has the ability to learn the gray-scale value of all pixels of described specific region A.Wherein, the initial gray-scale value of mean value, green colored backlights of the red gray-scale value of all pixels that red initial gray-scale value backlight is specific region A is the mean value of green gray-scale value of all pixels of specific region A, and the mean value of the blue gray-scale value of all pixels that blue initial gray-scale value backlight is specific region A, but not as restriction.
Continuation is with reference to Fig. 1 and Fig. 2, converting unit 203 couples image analysing computer processor 201, in order to receive and to select described red, green, blue three looks initial gray-scale value backlight one of them is used as substrate gray scale adjusted value, and described red, green, blue three looks initial gray-scale value backlight is distinctly subtracted each other with described substrate gray scale adjusted value, obtain red, green, blue three looks adjustment gray-scale value backlight thus.
In the present embodiment, substrate gray scale adjusted value must be smaller or equal to the minimum value person in the red, green, blue three looks initial gray-scale value backlight.In addition, according to CIE1931XYZ color standard system, the red, green, blue Tricolor LED R of light sources 103a, the chromatic value x of G, B deduct the absolute value of chromatic value x of the white light-emitting diode W of light sources 103a can be less than 3%, and its mathematical expression can be expressed as: | xRGB-xW|＜3%; And the chromatic value y of the red, green, blue Tricolor LED R of light sources 103a, G, B deduct the absolute value of chromatic value y of the white light-emitting diode W of light sources 103a also can be less than 3%, its mathematical expression can be expressed as: | yRGB-yW|＜3%.
For instance, the red, green, blue three looks initial gray-scale value backlight of gray-scale value of supposing all pixels of specific region A distinctly is 150,100 and 50, so based on as can be known above-mentioned, substrate gray scale adjusted value is 50, and (also can set substrate gray scale adjusted value is 40, not necessarily to equal minimum value), so red, green, blue three looks adjustment gray-scale value backlight promptly distinctly is 100,50 and 0; In addition, the red, green, blue three looks initial gray-scale value backlight of gray-scale value of supposing all pixels of specific region A distinctly is 255,255 and 255, so based on as can be known above-mentioned, substrate gray scale adjusted value is 255, so red, green, blue three looks adjustment gray-scale value backlight is 0,0 and 0 distinctly promptly, the rest may be inferred it.
Continue again with reference to Fig. 1 and Fig. 2, backlight module controller 205 couples converting unit 203 and light sources 103a, and red, green, blue three looks adjustment gray-scale value backlight that is obtained in order to foundation converting unit 203 and the substrate gray scale adjusted value of being selected come red, green, blue, Bai Sise light emitting diode R, G, B, the W among the driving light source group 103a respectively.
So based on as can be known above-mentioned, the backlight module control device 105 of present embodiment can be when LCD 100 need present complete white image frame (that is, be intended to present low chroma image frame), display panels 101 is given in the white light-emitting diode W supply white backlight source of all light sources 103a of control backlight module 103, and causes red, green, blue Tricolor LED R, G, the B of all light sources 103a of backlight module 103 not to supply any backlight to display panels 101.Therefore, under this condition, it is high that the power efficiency of the backlight module 103 of present embodiment (power efficiency) will be supplied the power efficiency of red, green, blue three looks light-emitting diode (LED) backlight module backlight simultaneously than tradition.
This can learn base is that when if LCD 100 desires to present low chroma image frame, the backlight module control device 105 of present embodiment can be opened the white light-emitting diode W of all light sources 103a, improves the power efficiency of backlight module 103 thus.
In addition, the backlight module control device 105 of present embodiment can be when LCD 100 need present full-color image frame, that is, desire to present high chroma image frame, red, green, blue, Bai Sise light emitting diode R, G, the B of all light sources 103a of control backlight module 103, W arranges in pairs or groups mutually provides the colored backlight source to display panels 101, wherein adjust the red, green, blue Tricolor LED R of gray-scale value, G, B one of them does not contribute the backlight of its color usually, and change by white light-emitting diode W and replace contribution in order to be used as substrate.Therefore, under this condition, the backlight module 103 of present embodiment can cause the whole colour gamut that 100 of LCD can present Billy to come highly with the whole colour gamut that the LCD of only supplying the backlight module of white backlight can present, and the dynamic range of the image that it presented (HDR) and demonstration contrast just can be raised again.
This can learn base is that when if LCD 100 desires to present high chroma image frame, the backlight module control device 105 of present embodiment can cut out the white light-emitting diode W of all light sources 103a, avoids the colour gamut of LCD 100 to dwindle thus.
Also because present embodiment has the backlight module 103 that is different from known backlight module design, and collocation drives its control device 105 again, so present embodiment can be taken into account the power efficiency of backlight module 103 and the whole colour gamut that 100 of LCD can present simultaneously.In addition, the image analysing computer processor 201 of present embodiment is also in order to provide a yield value (gain) to give converting unit 203, cause thus backlight module controller 205 can according to the substrate that converting unit 203 is selected adjust gray-scale value therewith the product of yield value come the white light-emitting diode W of driving light source group 103a.
Based on as can be known above-mentioned, the white light-emitting diode W of original light sources 103a only can adjust gray-scale value and be driven it (yield value that image analysing computer this moment processor 201 is provided is 1) according to substrate, but the yield value that is provided when image analysing computer processor 201 is non-when being 1 (for example being 2), white light-emitting diode W this moment of light sources 103a just can according to substrate adjust gray-scale value therewith yield value product and be driven it.Therefore, the brightness of the white light-emitting diode W of original light sources 103a will be raised twice.
Moreover, when if the yield value that image analysing computer processor 201 is provided is big more, what well imagine is that the brightness of the white light-emitting diode W of original light sources 103a will be raised more, is restriction but its maxgain value can not cause the white light-emitting diode W of light sources 103a to burn.Thus, owing to the white light-emitting diode W of light sources 103a more can be driven it according to the product that a gray-scale value and a yield value are adjusted in its substrate, so the LCD 100 that this enforcement provided just can present the image of spike brightness.
According to the disclosed content of the foregoing description, below will converge and put in order out a kind of method that can control the backlight module 103 of the foregoing description and consider and examine to those skilled in the art.Fig. 3 shows the process flow diagram of the backlight module control method of one embodiment of the invention.Merging is with reference to Fig. 1 and Fig. 3, the backlight module control method of present embodiment is suitable for controlling at least one light sources of all light sources in the backlight module 103 of the foregoing description, for example indicate the light sources of 103a among Fig. 1, and in order to want to be illustrated more clearly in spirit of the present invention, to be that example is done explanation with the single light source group earlier below, but earlier explanation is, this method is all light sources in the controlling back light module 103 also.
Light sources 103a is in order to the required light source of pixel of a certain specific region (for example regional A in the display panels 101 of Fig. 1) that display panels 101 is provided, and the backlight module control method of present embodiment comprises the following steps: at first, as described in step S301, receive red, green, blue three looks initial gray-scale value backlight.
Then, as described in step S303, according to red, green, blue three looks initial gray-scale value backlight with decision substrate gray scale adjusted value.Afterwards, as described in step S305,, obtain red, green, blue three looks adjustment gray-scale value backlight thus according to red, green, blue three looks initial gray-scale value backlight and substrate gray scale adjusted value.In the present embodiment, described red, green and blue three looks adjustment gray-scale value backlight is obtained after distinctly subtracting each other with described substrate gray scale adjusted value by described red, green and blue three looks initial gray-scale value backlight.At last, as described in step S307, come red, green, blue, Bai Sise light emitting diode in the driving light source group respectively according to red, green, blue three looks adjustment gray-scale value backlight and substrate gray scale adjusted value.
In the present embodiment, obtained behind the gray-scale value of described red, green and blue three looks initial gray-scale value backlight by all pixels of the described specific region A of analysis, and the initial gray-scale value of mean value, green colored backlights of the red gray-scale value of all pixels that red initial gray-scale value backlight is specific region A is the mean value of green gray-scale value of all pixels of specific region A, and the mean value of the blue gray-scale value of all pixels that blue initial gray-scale value backlight is specific region A.
In addition, substrate gray scale adjusted value is smaller or equal to the minimum value person in the red, green, blue three looks initial gray-scale value backlight.Moreover, according to CIE1931XYZ color standard system, the chromatic value x of red, green, blue Tricolor LED deducts the absolute value of the chromatic value x of white light-emitting diode can be less than 3%, and the chromatic value y of red, green, blue Tricolor LED deduct the absolute value of the chromatic value y of white light-emitting diode also can be less than 3%.
It will be further appreciated that in this white light-emitting diode of light sources more can be adjusted the product of a gray-scale value and a yield value and be driven it according to substrate, makes LCD can present the image of spike brightness thus.
In sum, because each group colored backlight of backlight module provided by the present invention all has four looks (that is red, green, blue, Bai Sise backlight) backlight, it is different from three traditional looks (that is red, green, blue three looks backlight) backlight and monochromatic (that is white backlight) backlight, and select the substrate that minimum value person in the red, green, blue three looks initial gray-scale value backlight is used as white backlight and adjust gray-scale value, and replace minimum value person in the red, green, blue three looks gray-scale value backlight by white backlight.Therefore, backlight module provided by the present invention and control method thereof and device can realize taking into account simultaneously the power efficiency of backlight module and the purpose of the whole colour gamut that LCD can present thus.
In addition, owing to have backlight module proposed by the invention and control device thereof in the LCD proposed by the invention, the dynamic range of the image that it presented and demonstration contrast just can be raised again.Moreover, owing to the brightness of white backlight more can be raised according to the product that a gray-scale value and a yield value are adjusted in its substrate, so LCD provided by the present invention just can present the image of spike brightness.
Though described the present invention by preferred embodiment; but it is not to be used to limit the present invention; those skilled in the art are under the situation that does not break away from the spirit and scope of the present invention; can carry out suitable modifications and variations, so protection scope of the present invention should be as the criterion with subsidiary claim.
Claims (12)
1, a kind of backlight module comprises:
A plurality of light sources, each light sources is in order to the required light source of pixel of a certain specific region that display panels is provided, and each light sources comprises:
First light source is driven according to red adjustment gray-scale value backlight;
Secondary light source is adjusted gray-scale value and is driven according to green colored backlights;
The 3rd light source is driven according to blue adjustment gray-scale value backlight; And
White light source is driven according to substrate gray scale adjusted value,
Wherein, described first, described second and described the 3rd light source produce described white light source, and described substrate gray scale adjusted value is determined by red, green and blue initial gray-scale value backlight, and described redness, described green and described blueness adjustment gray-scale value backlight is determined by described redness, described green and described blueness initial gray-scale value backlight and described substrate gray scale adjusted value.
2, backlight module as claimed in claim 1, wherein, obtained after the gray-scale value of described redness, described green and described blueness initial gray-scale value backlight by all pixels of the described specific region of analysis, wherein, the mean value of the red gray-scale value of all pixels that described redness initial gray-scale value backlight is described specific region, the initial gray-scale value of described green colored backlights are the mean value of green gray-scale value of all pixels of described specific region, and the mean value of the blue gray-scale value of all pixels that described blueness initial gray-scale value backlight is described specific region.
3, backlight module as claimed in claim 1, described substrate gray scale adjusted value is smaller or equal to the minimum value person in described redness, described green and the described blueness initial gray-scale value backlight.
4, backlight module as claimed in claim 1, wherein, described redness, described green and described blueness adjustment gray-scale value backlight is obtained after subtracting each other with described substrate gray scale adjusted value respectively by described redness, described green and described blueness initial gray-scale value backlight.
5, backlight module as claimed in claim 1, wherein, described first light source is that red light emitting diodes, described secondary light source are that green LED, described the 3rd light source are blue LED, and described white light source is a white light-emitting diode, and described first, described second, the described the 3rd and described white light source be arranged in two-dimensional matrix.
6, backlight module as claimed in claim 5, wherein, described green LED and described white light-emitting diode are arranged in the diagonal position in the described two-dimensional matrix.
7, a kind of backlight module control method, in order at least the first light sources in a plurality of light sources in the control backlight module, wherein, described first light sources has first light source, secondary light source, the 3rd light source and white light source, in order to the required light source of pixel of a certain specific region that display panels is provided, and described backlight module control method comprises the following steps:
Receive red, green and blue initial gray-scale value backlight;
According to described redness, described green and described blueness initial gray-scale value backlight, decide substrate gray scale adjusted value;
According to described redness, described green and described blueness initial gray-scale value backlight and described substrate gray scale adjusted value, obtain redness, green and blue adjustment gray-scale value backlight; And
According to described redness, described green and described blueness adjustment gray-scale value backlight and described substrate gray scale adjusted value, drive respectively in described first light sources described first, described second, the described the 3rd and described white light source.
8, backlight module control method as claimed in claim 7, wherein, described first light source is that red light emitting diodes, described secondary light source are that green LED, described the 3rd light source are blue LED, and described white light source is a white light-emitting diode, and described first, described second, the described the 3rd and described white light source be arranged in two-dimensional matrix.
9, backlight module control method as claimed in claim 8, wherein, the described white light-emitting diode of described first light sources is more adjusted the product of gray-scale value and yield value and is driven it according to described substrate.
10, backlight module control method as claimed in claim 8, wherein, according to CIE1931XYZ color standard system, the chromatic value x of described red, green, blue Tricolor LED deducts the absolute value of chromatic value x of described white light-emitting diode less than 3%, and the chromatic value y of described red, green, blue Tricolor LED deducts the absolute value of chromatic value y of described white light-emitting diode less than 3%.
11, a kind of backlight module control device, in order at least the first light sources in a plurality of light sources in the control backlight module, wherein, described first light sources has first light source, secondary light source, the 3rd light source and white light source, in order to the required light source of pixel of a certain specific region that display panels is provided, and described backlight module control device comprises:
The image analysing computer processor is in order to provide red initial gray-scale value backlight, the initial gray-scale value of green colored backlights and blue initial gray-scale value backlight;
Converting unit, couple described image analysing computer processor, in order to the described redness of foundation, described green and described blueness initial gray-scale value backlight, and decision substrate gray scale adjusted value, and, and obtain red adjustment gray-scale value backlight, green colored backlights adjustment gray-scale value and blue adjustment gray-scale value backlight according to described redness, described green and described blueness initial gray-scale value backlight and described substrate gray scale adjusted value; And
The backlight module controller, couple described converting unit and described first light sources, in order to drive respectively according to described redness, described green and described blueness adjustment gray-scale value backlight and described substrate gray scale adjusted value in described first light sources described first, described second, the described the 3rd and described white light source.
12, a kind of LCD comprises:
Display panels is in order to the show image picture;
Backlight module has a plurality of light sources, and in order to provide described display panels required light source, wherein each light sources comprises first light source, secondary light source, the 3rd light source and white light source; And
The backlight module control device, be suitable for controlling at least the first light sources in a plurality of light sources described in the described backlight module, wherein, described first light sources is in order to the required light source of pixel of a certain specific region that described display panels is provided, and described backlight module control device comprises:
The image analysing computer processor is in order to provide red initial gray-scale value backlight, the initial gray-scale value of green colored backlights and blue initial gray-scale value backlight;
Converting unit, couple described image analysing computer processor, in order to the described redness of foundation, described green and described blueness initial gray-scale value backlight, and decision substrate gray scale adjusted value, and, and obtain red adjustment gray-scale value backlight, green colored backlights adjustment gray-scale value and blue adjustment gray-scale value backlight according to described redness, described green and described blueness initial gray-scale value backlight and described substrate gray scale adjusted value; And
The backlight module controller, couple described converting unit and described first light sources, in order to drive respectively according to described redness, described green and described blueness adjustment gray-scale value backlight and described substrate gray scale adjusted value in described first light sources described first, described second, the described the 3rd and described white light source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810136079A CN101625476A (en) | 2008-07-11 | 2008-07-11 | Liquid crystal display, back light module, control device and method thereof |
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| CN200810136079A CN101625476A (en) | 2008-07-11 | 2008-07-11 | Liquid crystal display, back light module, control device and method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122501A (en) * | 2010-12-31 | 2011-07-13 | 福建华映显示科技有限公司 | Device and method for adjusting backlight of red-green-blue-white (RGBW) light display system |
| CN102479482A (en) * | 2010-11-26 | 2012-05-30 | 乐金显示有限公司 | Image display device and method of driving the same |
| CN106652921A (en) * | 2016-12-26 | 2017-05-10 | 武汉华星光电技术有限公司 | Display system, backlight module group and display device |
| CN109166558A (en) * | 2018-11-07 | 2019-01-08 | 惠科股份有限公司 | Picture element signal conversion method and device |
| CN109215602A (en) * | 2018-11-07 | 2019-01-15 | 惠科股份有限公司 | Picture element signal conversion method and device |
| WO2020083389A1 (en) * | 2018-10-26 | 2020-04-30 | 深圳Tcl新技术有限公司 | Liquid crystal display backlight module |
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2008
- 2008-07-11 CN CN200810136079A patent/CN101625476A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102479482A (en) * | 2010-11-26 | 2012-05-30 | 乐金显示有限公司 | Image display device and method of driving the same |
| CN102479482B (en) * | 2010-11-26 | 2014-12-24 | 乐金显示有限公司 | Image display device and method of driving the same |
| CN102122501A (en) * | 2010-12-31 | 2011-07-13 | 福建华映显示科技有限公司 | Device and method for adjusting backlight of red-green-blue-white (RGBW) light display system |
| CN102122501B (en) * | 2010-12-31 | 2013-09-11 | 福建华映显示科技有限公司 | Device and method for adjusting backlight of red-green-blue-white (RGBW) light display system |
| CN106652921A (en) * | 2016-12-26 | 2017-05-10 | 武汉华星光电技术有限公司 | Display system, backlight module group and display device |
| WO2020083389A1 (en) * | 2018-10-26 | 2020-04-30 | 深圳Tcl新技术有限公司 | Liquid crystal display backlight module |
| CN109166558A (en) * | 2018-11-07 | 2019-01-08 | 惠科股份有限公司 | Picture element signal conversion method and device |
| CN109215602A (en) * | 2018-11-07 | 2019-01-15 | 惠科股份有限公司 | Picture element signal conversion method and device |
| CN109215602B (en) * | 2018-11-07 | 2020-07-10 | 惠科股份有限公司 | Pixel signal conversion method and device |
| US11238817B2 (en) | 2018-11-07 | 2022-02-01 | HKC Corporation Limited | Method and apparatus for pixel signal conversion |
| US11403986B2 (en) | 2018-11-07 | 2022-08-02 | HKC Corporation Limited | Pixel signal conversion method and device, and computer device |
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