CN108962155A - Luminance regulating method and display - Google Patents
Luminance regulating method and display Download PDFInfo
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- CN108962155A CN108962155A CN201710358138.2A CN201710358138A CN108962155A CN 108962155 A CN108962155 A CN 108962155A CN 201710358138 A CN201710358138 A CN 201710358138A CN 108962155 A CN108962155 A CN 108962155A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3622—Control of matrices with row and column drivers using a passive matrix
- G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
- G09G3/364—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals with use of subpixels
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Abstract
The present invention proposes that a kind of luminance regulating method is suitable for display.The display panel of the display includes multiple pixels.The luminance regulating method is the following steps are included: judge the respective max pixel value of the multiple pixel in picture；Count the respective max pixel value of the multiple pixel corresponding multiple gray values quantity, to establish grey value histograms；According to the grey value histograms to determine whether generating index value；The pixel gain value for corresponding to the index value is obtained according to look-up table；And each pixel in the picture is adjusted according to the pixel gain value.In addition, a kind of display is also suggested.
Description
Technical field
The present invention relates to a kind of display technologies, and in particular to a kind of luminance regulating method, and apply the brightness tune
The display of adjusting method.
Background technique
With the development of science and technology liquid crystal display (LCD) has been widely used in such as mobile phone, tablet computer and electricity
Depending on etc. in various display equipment.In general, the backlight illumination in order to more effectively utilize liquid crystal display, it can be traditional
The sub- picture element (W) of white is added in RGB liquid crystal display (Red-Green-Blue), to increase the penetrance of display panel.So
And since the overall quantity of the red sub-pixel of RGBW display (R), green sub-pixels (G) and blue subpixels (B) is about
3/4ths of RGB display, therefore the entirety of the red sub-pixel of RGBW display, green sub-pixels and blue subpixels
Quantity can be less than RGB display.That is, if driving RGBW display using the driving signal of RGB display,
The overall brightness of the red sub-pixel of RGBW display, green sub-pixels and blue subpixels can be lower than RGB display.It is right
This, how effectively to adjust the chroma-luminance of RGBW display is project important at present.
Summary of the invention
The present invention provides a kind of luminance regulating method and display, wherein display of the invention and its brightness adjustment side
Method can correspond respectively to the quantity of multiple gray values by calculating multiple object pixels in picture, to determine whether needing to adjust
The pixel value of each object pixel in whole picture, luminance regulating method of the invention and display panel can provide well accordingly
Display result.
Luminance regulating method of the invention is suitable for display, and the display panel of the display includes multiple pictures
Element.The luminance regulating method is the following steps are included: judge the respective max pixel value of the multiple pixel in picture；Statistics
The multiple respective max pixel value of pixel corresponding multiple gray values quantity, to establish gray value histogram
Figure；According to the grey value histograms to determine whether generating index value；It is obtained according to look-up table and corresponds to the index value
Pixel gain value；And each pixel in the picture is adjusted according to the pixel gain value.
In one embodiment of this invention, multiple pixels described above respectively include red sub-pixel, green sub-pixels with
And blue subpixels, and the step of judging the respective max pixel value of the multiple pixel in picture includes: to compare
The respective red sub-pixel of the multiple pixel, the green sub-pixels and the blue subpixels, it is each to determine
The max pixel value of a the multiple pixel.
In one embodiment of this invention, the above-mentioned display panel is RGBW display panel.
In one embodiment of this invention, it is above-mentioned according to the grey value histograms to determine whether generating the index value
The step of include: sequentially to add up corresponding to different gray values from the maximum gradation value of the grey value histograms toward minimum gradation value
Quantity, stop gray value that is accumulative, and determining finally accumulative after accumulative total magnitude is greater than or equal to critical number magnitude
For the index value.
In one embodiment of this invention, above-mentioned that the pixel for corresponding to the index value is obtained according to the look-up table
The step of yield value includes: to obtain corresponding yield value according to the index value, and by the yield value divided by predetermined coefficient,
To obtain the pixel gain value.
In one embodiment of this invention, the above-mentioned the multiple picture adjusted according to the pixel gain value in the picture
The step of element includes: by by the respective red sub-pixel of the multiple pixel, the green sub-pixels and the indigo plant
The pixel value of sub-pixels is respectively multiplied by the pixel gain value, to adjust the multiple pixel.
In one embodiment of this invention, the above-mentioned the multiple picture adjusted according to the pixel gain value in the picture
If the step of element includes: the red sub-pixel, the green sub-pixels and the blue subpixels of the multiple pixel
At least one of adjustment after pixel value be greater than max pixel value, then by the red sub-pixel of the multiple pixel,
At least one of the green sub-pixels and the blue subpixels are set as the max pixel value.
Display of the invention includes sequence controller, source electrode driver and display panel.When source electrode driver couples
Sequence controller.Display panel includes multiple pixels to show picture.Sequence controller is aobvious to be driven by source electrode driver
Show panel.Sequence controller includes judgment module, statistical module, analysis module, searching module and adjustment module.Judgment module
To judge the respective max pixel value of the multiple pixel in the picture.Analysis module is to straight according to the gray value
Side's figure is to determine whether generate index value.Searching module corresponds to the pixel gain of the index value to obtain according to look-up table
Value.Module is adjusted to adjust the multiple pixel of each of the picture according to the pixel gain value.
In one embodiment of this invention, above-mentioned multiple pixels respectively include red sub-pixel, green sub-pixels and
Blue subpixels, and the object pixel includes first pixel, second pixel and the third pixel, and
The sequence controller operates the respective red sub-pixel of more the multiple pixel of judgment module, green
Pixel and the blue subpixels, to determine the max pixel value of each pixel.
In one embodiment of this invention, above-mentioned display panel is RGBW display panel.
In one embodiment of this invention, above-mentioned sequence controller operates the analysis module by the gray value histogram
The maximum gradation value of figure sequentially adds up quantity corresponding to different gray values toward minimum gradation value, be greater than until accumulative total magnitude or
It is accumulative equal to stopping after critical number magnitude, and determine that finally accumulative gray value is the index value.
In one embodiment of this invention, above-mentioned sequence controller operates the searching module and takes according to the index value
Corresponding yield value is obtained, and by the yield value divided by predetermined coefficient, to obtain the pixel gain value.
In one embodiment of this invention, above-mentioned sequence controller operates the adjustment module by by the multiple picture
The pixel value of the respective red sub-pixel of element, the green sub-pixels and the blue subpixels is respectively multiplied by the picture
Plain yield value, to adjust the multiple pixel.
In one embodiment of this invention, if the red sub-pixel of above-mentioned multiple pixels, the green sub-pixels
And pixel value is greater than max pixel value, the then sequence controller after at least one of adjustment of the blue subpixels
The adjustment module is operated by the red sub-pixel of the multiple pixel, the green sub-pixels and the sub- picture of blue
At least one of element is set as the max pixel value.
The maximum of each pixel in picture can be effectively judged based on above-mentioned, of the invention luminance regulating method and display
The distribution situation of pixel value, and then each red sub-pixel, each green of the corresponding adjustment RGBW display panel in display picture
The brightness of sub-pixel and each blue subpixels.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and cooperate institute's accompanying drawings
It is described in detail below.
Detailed description of the invention
Fig. 1 is the schematic diagram according to a kind of display of one embodiment of the invention.
Fig. 2 is the grey value histograms according to one embodiment of the invention.
Fig. 3 is the schematic diagram according to the adjustment gray value of one embodiment of the invention.
Fig. 4 is the flow chart according to a kind of luminance regulating method of one embodiment of the invention.
Specific embodiment
Multiple embodiments set forth below illustrate the present invention, however the present invention is not limited to illustrated by multiple embodiments.Again
Combination appropriate is also still allowed between embodiment.
Fig. 1 is the schematic diagram according to a kind of display of one embodiment of the invention.Fig. 1 is please referred to, when display 100 includes
Sequence controller 110 (Timing Controller, TCON), source electrode driver 120 (Source driver) and display panel
130.Sequence controller 110 may include multiple modules, and wherein these modules can be used for image procossing.In the present embodiment, these
Module may include having judgment module 111, statistical module 112, analysis module 113, searching module 114 and adjustment module 115.
In this example it is shown that device 100 is liquid crystal display (Liquid Crystal Display, LCD).Timing control
Device 110 processed couples source electrode driver 120, and source electrode driver 120 couples display panel 130.Sequence controller 110 passes through source
Driver 120 drives display panel 130.In the present embodiment, judgment module 111, statistics can be performed in sequence controller 110
Module 112, analysis module 113, searching module 114 and adjustment module 115, so as to realize shadow described in various embodiments of the present invention
As analysis and method of adjustment etc..In the present embodiment, judgment module 111, statistical module 112, analysis module 113, lookup mould
Block 114 and adjustment module 115 can be realized by the circuit form of hardware, but the present invention is not limited thereto.In an embodiment
In, these modules also can be for software form storage in the storage device, so that sequence controller 110 can be by executing these moulds
Block, to realize image analysing computer described in various embodiments of the present invention and method of adjustment etc..
In this example it is shown that panel 130 can be a kind of RGBW display panel (Red-Green-Blue-White).It is aobvious
Show that panel 130 may include multiple pixels, and each pixel respectively includes four sub-pixels, wherein respectively red sub-pixel
(R), green sub-pixels (G), blue subpixels (B) and white sub-pixels (W).In this regard, the display panel 130 of the present embodiment will
The quantity of different gray values can be corresponded respectively to, according to the respective max pixel value of each pixel to decide whether to adjust each picture
The pixel value (brightness value) of the red sub-pixel of element, green sub-pixels and blue subpixels.
In the present embodiment, when display panel 130 shows image, these modules are can be performed in sequence controller 110.At this
In embodiment, for a picture (Frame) of image, judgment module 111 can be used to judge multiple pictures in this picture
The respective max pixel value of element.Judgment module 111 may compare the respective red sub-pixel of these pixels, green sub-pixels and indigo plant
Sub-pixels, to determine the max pixel value of each pixel.For example, if certain pixel has red sub-pixel value, green
Pixel value and blue subpixels value are respectively 125,125 and 255, then judgment module 111 judges the maximum pixel of this pixel
Value is 255.
In the present embodiment, the respective max pixel value institute of these the statistics available pixels of statistical module 112 is corresponding more
The quantity of a gray value, to establish grey value histograms.Then, analysis module 113 can be by the maximum ash of grey value histograms
Angle value (255) sequentially adds up the different corresponding quantity of gray value toward minimum gradation value (0), until accumulative total magnitude is greater than
Or stop adding up after being equal to critical number magnitude, and determine that finally accumulative gray value is index value.Also, searching module 114
The pixel gain value (Pixel Gain) for corresponding to this index value can be obtained according to look-up table (Look Up Table, LUT).Most
Afterwards, adjustment module 115 can adjust whole pixels of display panel 130 according to pixel gain value, so that display panel 130 was shown
The brightness of this picture can be raised.Subsidiary one is mentioned that, above-mentioned each module can also continuously adjust multiple continuous in image
Picture, to carry out dynamic light adjustment (dimming) operation.
Fig. 2 is the grey value histograms according to one embodiment of the invention.Please refer to Fig. 1 and Fig. 2, above-mentioned statistical module
The max pixel value of each pixel can respectively be ranged corresponding gray value by 112, to establish gray value histogram as shown in Figure 2
Figure.In the present embodiment, the gray value that the horizontal axis of grey value histograms is 0 to 255, and the longitudinal axis of grey value histograms is number
Amount.Therefore, grey value histograms can be used to present the distribution situation of the max pixel value of each pixel in a picture.Also,
In the present embodiment, analysis module 113 can be from the maximum gradation value (255) of grey value histograms toward minimum gradation value (0) sequentially
Add up quantity corresponding to different gray values, stops adding up after accumulative total magnitude is greater than or equal to critical number magnitude t, and
Determine that finally accumulative gray value is index value.
In the present embodiment, the display 100 of the present embodiment can set critical value t according to user demand or panel specification
Size.In the present embodiment, sequence controller 110 can be by executing the look-up table that be established of searching module 114, to obtain pair
It should be in the yield value (Gain) of index value.Look-up table can be for example shown in following table 1.
| Index value (Index) | Yield value (Gain) |
| 128 | 512 |
| 160 | 410 |
| 192 | 341 |
| 240 | 273 |
| 255 | 256 |
Table 1
For example, when analysis module 113 is 240 by finally accumulative gray value is determined, searching module 114 is from lookup
Being obtained in table corresponding to the yield value of index value 240 is 273.Then, searching module 114 can be default divided by one by yield value
Coefficient, to obtain the pixel gain value (Pixel Gain).In the present embodiment, predetermined coefficient can be 256, and this picture
Plain yield value is 273/256, but the present invention is not limited thereto.In one embodiment, the look-up table of table 1 can be according to user's demand
Or panel characteristics determine, and the relationship of yield value and pixel gain value can determine it according to following formula (1).
PixelGain=Gain/256 ... ... ... (1)
Fig. 3 is the schematic diagram according to the adjustment gray value of one embodiment of the invention.Fig. 1 and Fig. 3 is please referred to, for driving
The output gray level value that the input gray level value (input gray scale) and display panel 130 of display panel 130 are presented
The relationship of (output gray scale) can be as shown in line segment L1.Illustrate according to the example above, when searching module 114 is from table 1
When obtaining that correspond to the yield value of index value 240 be 273 in look-up table, sequence controller 110 can obtain pixel gain value and be
273/256.Then, the executable adjustment module 115 of sequence controller 110 is by the respective pixel value of each pixel multiplied by 273/256.
However, since the upper limit of pixel value is 255, if the red sub-pixel of certain pixel, green sub-pixels and blue subpixels
At least one of adjustment after pixel value be greater than the upper limit of pixel value, then by the red sub-pixel of this pixel, the sub- picture of green
At least one of pixel value of element and blue subpixels is directly set as 255.Again for example, if the pixel of this pixel
Value is 240, then multiplied by after pixel gain value 273/256 approximately equal to 255.9.In this regard, adjustment module 115 can be by this pixel
This pixel value is directly set as 255.Therefore, the relationship of input gray level value and output gray level value adjusted can be such as line segment L2 institute
Show, and the overall color brightness in picture shown by display panel adjusted 130 will be lightened.
Fig. 4 is the flow chart according to a kind of luminance regulating method of one embodiment of the invention.Fig. 1 and Fig. 4 is please referred to, this
The luminance regulating method of embodiment can at least be suitable for the display 100 of Fig. 1.In this example it is shown that the display surface of device 100
Plate 130 may include multiple pixels.The luminance regulating method of the present embodiment may include following steps.In step S410, timing control
Judgment module 111 can be performed in device 110 processed, and judges the respective max pixel value of multiple pixels in one picture.In step
In rapid S420, statistical module 112 is can be performed in sequence controller 110, and counts the respective max pixel value of these pixels and divide
The quantity of not corresponding multiple gray values, to establish grey value histograms.In step S430, sequence controller 110 is executable
Analysis module 113, and according to grey value histograms to determine whether generating index value.In step S440, sequence controller
110 executable searching modules 114, and the pixel gain value for corresponding to index value is obtained according to look-up table.In step S450,
The executable adjustment module 115 of sequence controller 110, and according to each of these pixels in pixel gain value adjustment picture
It is a.Accordingly, the luminance regulating method of the present embodiment can effectively adjust each red son of the RGBW display panel in display picture
The brightness of pixel, each green sub-pixels and each blue subpixels.
In addition, the relevant apparatus feature of the luminance regulating method about the present embodiment, image analysing computer mode and image tune
Perfect square formula can obtain enough teachings, suggest and implement explanation in the narration by above-mentioned Fig. 1 to Fig. 3 embodiment, therefore no longer superfluous
It states.
In conclusion luminance regulating method and display of the invention can effectively judge each red son in display panel
The color shade degree of pixel, each green sub-pixels and each blue subpixels, and then the whole color of corresponding adjustment display panel
Color brightness.Also, the present invention can also sequentially be adjusted for multiple and different continuous pictures in image, so that dynamic adjustment display
The chroma-luminance of panel.Accordingly, luminance regulating method of the invention and display can provide good display effect.
Although the present invention has been disclosed by way of example above, it is not intended to limit the present invention., any those skilled in the art
Member, without departing from the spirit and scope of the present invention, when can make some changes and embellishment, therefore protection scope of the present invention is when view
Subject to the attached claims institute defender.
Claims (14)
1. a kind of luminance regulating method is suitable for display, and the display panel of the display includes multiple pixels, wherein
The luminance regulating method includes:
Judge the respective max pixel value of the multiple pixel in picture；
Count the respective max pixel value of the multiple pixel corresponding multiple gray values quantity, to establish ash
Angle value histogram；
According to the grey value histograms to determine whether generating index value；
The pixel gain value for corresponding to the index value is obtained according to look-up table；And
Each of picture pixel is adjusted according to the pixel gain value.
2. luminance regulating method as described in claim 1, wherein the multiple pixel respectively includes red sub-pixel, green
Pixel and blue subpixels, and the step of judging the respective max pixel value of the multiple pixel in picture packet
It includes:
The respective red sub-pixel of more the multiple pixel, the green sub-pixels and the blue subpixels, come
Determine the max pixel value of each pixel.
3. luminance regulating method as described in claim 1, wherein the display panel is RGBW panel.
4. luminance regulating method as described in claim 1, wherein according to the grey value histograms to determine whether generating institute
The step of stating index value include:
Sequentially add up quantity corresponding to different gray values toward minimum gradation value from the maximum gradation value of the grey value histograms,
Stop adding up after accumulative total magnitude is greater than or equal to critical number magnitude, and determines that finally accumulative gray value is the rope
Draw value.
5. luminance regulating method as described in claim 1 corresponds to the index value wherein obtaining according to the look-up table
The step of pixel gain value includes:
Corresponding yield value is obtained according to the index value, and by the yield value divided by predetermined coefficient, to obtain the picture
Plain yield value.
6. luminance regulating method as described in claim 1, wherein adjusting the institute in the picture according to the pixel gain value
The step of stating multiple pixels include:
By by the respective red sub-pixel of the multiple pixel, the green sub-pixels and the blue subpixels
Pixel value is respectively multiplied by the pixel gain value, to adjust the multiple pixel.
7. luminance regulating method as claimed in claim 6, wherein adjusting the institute in the picture according to the pixel gain value
The step of stating multiple pixels include:
If the red sub-pixel of the multiple pixel, the green sub-pixels and the blue subpixels are at least within
One of adjustment after pixel value be greater than max pixel value, then by the red sub-pixel of the multiple pixel, it is described green son
At least one of pixel and the blue subpixels are set as the max pixel value.
8. a kind of display, comprising:
Sequence controller；
Source electrode driver couples the sequence controller；And
Display panel, including multiple pixels, and to show picture,
Wherein the sequence controller is to drive the display panel, and the timing control by the source electrode driver
Device includes:
Judgment module, to judge the respective max pixel value of the multiple pixel in the picture；
Statistical module, to count the multiple pixel respective max pixel value corresponding multiple gray values
Quantity, to establish grey value histograms；
Analysis module, to according to the grey value histograms to determine whether generate index value；
Searching module, to obtain the pixel gain value for corresponding to the index value according to look-up table；And
Module is adjusted, to adjust each of picture pixel according to the pixel gain value.
9. display as claimed in claim 8, wherein the multiple pixel respectively include red sub-pixel, green sub-pixels with
And blue subpixels, and the object pixel includes first pixel, second pixel and the third pixel, and
And the sequence controller operates the respective red sub-pixel of more the multiple pixel of judgment module, the green
Sub-pixel and the blue subpixels, to determine the max pixel value of each pixel.
10. display as claimed in claim 8, wherein the display panel is a RGBW panel.
11. display as claimed in claim 8, wherein the sequence controller operates the analysis module by the gray value
The maximum gradation value of histogram sequentially adds up quantity corresponding to different gray values toward minimum gradation value, until accumulative total magnitude is big
In or stop after being equal to critical number magnitude accumulative, and determine that finally accumulative gray value is the index value.
12. display as claimed in claim 8, wherein the sequence controller operates the searching module according to the index
Value obtains corresponding yield value, and by the yield value divided by predetermined coefficient, to obtain the pixel gain value.
13. display as claimed in claim 8, wherein the sequence controller operate that the adjustment module passes through will be described more
The pixel value of the respective red sub-pixel of a pixel, the green sub-pixels and the blue subpixels is respectively multiplied by institute
Pixel gain value is stated, to adjust the multiple pixel.
14. display as claimed in claim 13, wherein if the red sub-pixel of the multiple pixel, green
Pixel value is greater than max pixel value, then the timing control after at least one of adjustment of pixel and the blue subpixels
Device processed operates the adjustment module for the red sub-pixel, the green sub-pixels and the blue of the multiple pixel
At least one of sub-pixel is set as the max pixel value.
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