CN104021767B - Gamma curve method of adjustment and its gal code voltage generator and display device - Google Patents
Gamma curve method of adjustment and its gal code voltage generator and display device Download PDFInfo
- Publication number
- CN104021767B CN104021767B CN201310065817.2A CN201310065817A CN104021767B CN 104021767 B CN104021767 B CN 104021767B CN 201310065817 A CN201310065817 A CN 201310065817A CN 104021767 B CN104021767 B CN 104021767B
- Authority
- CN
- China
- Prior art keywords
- sub
- making
- pixel
- grey decision
- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000004973 liquid crystal related substance Substances 0.000 claims description 12
- 244000025254 Cannabis sativa Species 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 238000013139 quantization Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention discloses a kind of gamma curve method of adjustment and its gamma voltage generator and display device, the method is in the display control program of display device, and comprises the following steps: analyze each sub-pixel grey decision-making distribution situation of each color of picture；And adjust at least one gal code reference voltage according to the sub-pixel grey decision-making distribution situation of described color, so that statistical magnitude is relatively many or corresponding to multiple sub-pixel grey decision-making of at least one pre-set interval of the relatively large person of ratio, multiple GTGs, the quantity of gray scale voltage increase, and make statistical magnitude relatively small or the relatively small person of ratio at least one pre-set interval multiple sub-pixel grey decision-making corresponding to multiple GTGs, the quantity of gray scale voltage reduce.
Description
Technical field
The present invention is related to a kind of display device, and especially for display control program gamma curve method of adjustment with
Its gal code voltage generator.
Background technology
Display Technique quickly grows at present, and wherein liquid crystal indicator (liquid crystal display, LCD) is especially
It is employed widely, and as the image outut device of various electronic installations.Liquid crystal molecule in liquid crystal indicator is to pass through
Its voltage being applied in and deflect, to control the light transmittance of corresponding sub-pixel.
Refer to the partial block schematic diagram that Fig. 1, Fig. 1 are tradition display control programs.In Fig. 1, tradition display controls
Gal code voltage generator 11 in system receives a system voltage AVDD, and produces many according to the resistance 112 of its multiple concatenations
Individual gal code reference voltage VGMA_1～VGMA_N.Then, the GTG of source electrode drive circuit 12 in tradition display control program, GTG
Voltage generator 122 is according to the multiple gal code reference voltage V receivedGMA_1～VGMA_NProduce gray scale voltage Vg1～Vgn。
As it is shown in figure 1, gray scale voltage Vg1～VgiAccording to gal code reference voltage VGMA_1With VGMA_2Produced, and gray scale voltage
Vgk～VgnAccording to gal code reference voltage VGMA_N-1With VGMA_NProduced.It addition, the producing method of other gray scale voltage is the most in like manner
Can be according to two continuous print gal code reference voltage VGMA_i-1With VGMA_iProduced.Then, tradition display control program can be according to each
The sub-pixel grey decision-making of sub-pixel produces corresponding multiple control signals X1～XL, source electrode drive circuit 12 is according to receiving corresponding son
Control signal X of pixel1～XL, and according to each control signal X1～XLSelect gray scale voltage Vg1～VgnA conduct therein
The driving voltage Y of each corresponding sub-pixel1～YL, to control the deflection of each corresponding liquid crystal.
Please referring next to Fig. 2, Fig. 2 is the curve chart of the gamma curve of corresponding traditional liquid crystal panel.In Fig. 2, the longitudinal axis is
The driving voltage of corresponding sub-pixel liquid crystal, transverse axis is then the sub-pixel GTG of corresponding sub-pixel.Because, the multiple strings in Fig. 1
The resistance value of the resistance 112 connect is fixed value, therefore causes gal code reference voltage VGMA_1～VGMA_NMagnitude of voltage be fixed value, and
Cannot adjust, and gamma curve also cannot at random be adjusted.
In general, human eye is more more sensitive than the details in becoming clear for the details in dark, and therefore, numerical value is bigger
GTG corresponding to multiple sub-pixel grey decision-making, the negligible amounts (that is, quantization degree is less) of gray scale voltage, and numerical value is less
The quantity of gray scale voltage corresponding to multiple sub-pixel grey decision-making more (that is, quantization degree is bigger), to maintain the saturated of picture
Degree.
In order to maintain picture saturation, generally continuous two gal codes can be made by designing the resistance value of multiple resistance 112
Reference voltage VGMA_1With VGMA_2Between voltage difference relatively big, and make continuous two gal code reference voltage VGMA_N-1With VGMA_NBetween
Voltage difference less, to allow GTG, the negligible amounts of gray scale voltage corresponding to the bigger multiple sub-pixel grey decision-making of numerical value, and allow
Corresponding to multiple sub-pixel grey decision-making that numerical value is less, the quantity of gray scale voltage is more.
As a example by Fig. 2, the sub-pixel grey decision-making of 255～176 can the corresponding continuous two gal codes reference electricity bigger by voltage difference
Pressure VGMA_1With VGMA_2Produced 10 gray scale voltages.It addition, the sub-pixel grey decision-making of 44～0 can be corresponding less by voltage difference
Continuous two gal code reference voltage VGMA_N-1With VGMA_NProduced 10 gray scale voltages.
But, because multiple sub-pixel grey decision-making of picture may be partial to concentrates on specific numerical intervals, therefore, if nothing
Method dynamically adjusts gamma curve or gal code reference voltage VGMA_1～VGMA_N, it will sacrifice the contrast of picture, and make image
Quality is the best.
Summary of the invention
It is an object of the invention to provide a kind of gamma curve method of adjustment, it is for the display control program of display device
In.
Gamma curve method of adjustment of the present invention comprises the following steps: analyze each pixel of picture and each sub-pixel of each color
Grey decision-making distribution situation；And adjust at least one gal code reference according to the sub-pixel grey decision-making distribution situation of described pixel with color
Voltage, so that statistical magnitude is relatively many or multiple pixels of at least one pre-set interval of the relatively large person of ratio and many height picture
Element grey decision-making corresponding to multiple gray scale voltages quantity increase, and make statistical magnitude relatively small or the relatively small person of ratio extremely
Corresponding to multiple pixels of a few pre-set interval and multiple sub-pixel grey decision-making, the quantity of multiple gray scale voltages reduces.
The present invention provides a kind of gal code voltage generator, and it includes multiple resistance, multiple buffer amplifier and multiple controls
Voltage generator.Multiple resistance are concatenated with one another, and first resistance of the multiple resistance wherein concatenated is electrically connected with system voltage, string
Last resistance of the multiple electricity resistance connect is electrically connected to ground voltage, and the junction point of wantonly two adjacent resistors is in order to export
Corresponding gal code reference voltage.The outfan of each buffer amplifier is electrically connected with the junction point of corresponding wantonly two adjacent resistors, and
Each buffer amplifier is selected the enable of signal institute by corresponding enable.Each outfan controlling voltage generator is electrically connected with corresponding
The input of buffer amplifier, each voltage generator that controls receives corresponding voltage adjustment signal generation voltage signal.
In sum, the gamma curve method of adjustment that the embodiment of the present invention provides can increase contrast and the image of picture
Quality.In addition, the framework of the gal code voltage generator that the embodiment of the present invention is provided is simple and is easily achieved, and it can
To be adjusted the gal code reference voltage of generation by control, increase contrast and the image quality of picture.
It is further understood that inventive feature and technology contents for enabling, refers to below in connection with the present invention specifically
Bright and accompanying drawing, but this explanation is only used for institute's accompanying drawings the present invention is described, rather than scope of the presently claimed invention is appointed
What restriction.
Accompanying drawing explanation
Fig. 1 is the partial block schematic diagram of tradition display control program.
Fig. 2 is the curve chart of the gamma curve of corresponding traditional liquid crystal panel.
Fig. 3 is the flow chart of the gamma curve method of adjustment of the embodiment of the present invention.
Fig. 4 is the curve chart of the gamma curve after using the gamma curve method of adjustment of the embodiment of the present invention to adjust.
Fig. 5 is the circuit diagram of the display control program of the embodiment of the present invention.
Fig. 6 is the flow chart of the gamma curve method of adjustment of another embodiment of the present invention.
Fig. 7 is the curve chart of the gamma curve after adjusting by the gamma curve method of adjustment of another embodiment of the present invention.
Fig. 8 is the curve chart of the pixels statistics after adjusting by the gamma curve method of adjustment of another embodiment of the present invention.
Fig. 9 is the song before and after the pixels statistics after adjusting by the gamma curve method of adjustment of another embodiment of the present invention adjusts
Line chart.
Wherein, description of reference numerals is as follows:
11: tradition gal code voltage generator
112,512: resistance
12,52: source electrode drive circuit
122,522: gray scale voltage generator
S301, S302, S601～S604: step
5: display control program
51: gal code voltage generator
514: buffer amplifier
516: digital analog converter
53: control circuit
54: backlight module
C711, C712: gamma curve
N1, N2, N2 ': pixels statistics curve
Detailed description of the invention
(embodiment of gamma curve method of adjustment)
Refer to the flow chart that Fig. 3, Fig. 3 are the gamma curve methods of adjustment of the embodiment of the present invention.Gamma curve adjustment side
Method is in display control program, and it realizes by the way of hardware or software and hardware, and display control program is for backlight
Or self-emission display apparatus, such as liquid crystal indicator or organic LED display device.
First, in step S301, by control circuit (for example, time schedule controller) or the front end of display control program
Operating system analyze picture each pixel gray level value distribution situation with obtain each color each sub-pixel grey decision-making distribution situation,
That is the sub-pixel grey decision-making of statistics picture falls within statistical magnitude and the statistics ratio of each pre-set interval.For example, statistics picture
The red sub-pixel grey decision-making in face be 0～44,45～175 and the statistical magnitude of 176～255 or statistics ratio.Preset it addition, each
Interval can be according to situation sets itself.
Then, in step s 302, by control circuit or the operating system foundation picture of front end of display control program
Each pixel and each sub-pixel grey decision-making distribution situation adjust corresponding gal code reference voltage, with allow statistical magnitude the most (compare
The relatively large person of rate) pre-set interval multiple pixels and multiple sub-pixel grey decision-making corresponding to the quantity of gray scale voltage increase
(that is, increase quantization degree), and allow multiple pixels of pre-set interval of statistical magnitude relatively small (the relatively small person of ratio)
With multiple sub-pixel grey decision-making corresponding to the quantity of gray scale voltage reduce (that is, reduce quantization degree).
It addition, multiple pixels of the so-called relatively large number of pre-set interval of statistical magnitude refer to it with multiple sub-pixel grey decision-making
Statistical magnitude is more than multiple pixels of the first specified threshold and multiple sub-pixel grey decision-making, or refers to that its ratio is more than first
Multiple pixels of specific ratios and multiple sub-pixel grey decision-making；And multiple pictures of the what is called relatively small number of pre-set interval of statistical magnitude
Plain and multiple sub-pixel grey decision-making refer to that its statistical magnitude is grey with multiple sub-pixels less than multiple pixels of the second specified threshold
Rank are worth, or refer to that its ratio is less than multiple pixels of the second specific ratios and multiple sub-pixel grey decision-making.
For example, if a total of 100 red sub-pixel of picture, wherein there is the sub-pixel GTG of 50 red sub-pixel
Value falls within the pre-set interval of 0～44, and has the sub-pixel grey decision-making of 50 red sub-pixel to fall within the pre-set interval of 176～255,
Then sub-pixel grey decision-making can be made to fall within 0～44 and the pre-set interval of 176～255 by adjusting corresponding gal code reference voltage
Multiple sub-pixel grey decision-making corresponding to gray scale voltage quantity increase, with make sub-pixel grey decision-making fall within 45～175 preset
Corresponding to interval multiple sub-pixel grey decision-making, the quantity of gray scale voltage reduces, and even becomes 0.
For as another example, if a total of 100 red sub-pixel of picture, wherein there is the sub-pixel of 80 red sub-pixel
Grey decision-making falls within the pre-set interval of 0～44, has the sub-pixel grey decision-making of 10 red sub-pixel to fall within the preset areas of 45～175
Between, and have the sub-pixel grey decision-making of 10 red sub-pixel to fall within the pre-set interval of 176～255, then can be by adjusting correspondence
Gal code reference voltage, makes GTG corresponding to multiple sub-pixel grey decision-making of the pre-set interval that sub-pixel grey decision-making falls within 0～44
The quantity of voltage increases, grey with multiple sub-pixels of the pre-set interval making sub-pixel grey decision-making fall within 45～175 and 176～255
The quantity of the corresponding gray scale voltage of rank value reduces.
After adjusting according to the gamma curve method of adjustment with reference to Fig. 2 and Fig. 4, Fig. 4 being the use embodiment of the present invention the most simultaneously
The curve chart of gamma curve.In this embodiment, the sub-pixel grey decision-making of 40% red sub-pixel is had to fall within the preset areas of 0～44
Between, there is the sub-pixel grey decision-making of 40% red sub-pixel to fall within the pre-set interval of 45～175, and have the sub-picture of 20% red sub-pixel
Element grey decision-making falls within the pre-set interval of 176～255, the therefore gamma reference voltage V of the gamma curve compared to Fig. 2GMA_2、
VGMA_3、VGMA_N-2With VGMA_N-1For, the gamma reference voltage V of Fig. 4GMA_2、VGMA_3Elevated, and gamma reference voltage
VGMA_N-2、VGMA_N-1Be lowered so that fall within the gray scale voltage corresponding to pre-set interval red sub-pixel grey decision-making of 0～44 by
Originally 10 become 20, and make to fall within the gray scale voltage corresponding to pre-set interval red sub-pixel grey decision-making of 176～255
20 are become from original 10.
What deserves to be explained is, the data in above-mentioned example are the most only to illustrate, these data are all not used to limit this
Bright.Or rather, continuous two gamma reference voltages can produce the number of gray scale voltage, pre-set interval, first special
Determine thresholding, the second specified threshold, the first specific ratios all can be set according to situation with the second specific ratios.It addition,
Although above-mentioned example illustrates as a example by red sub-pixel grey decision-making, but the present invention is not limited to this, described sub-pixel ash
Rank value may can also is that the sub-pixel grey decision-making of blueness, green, cyan, purple, yellow, orange, white or other colors.
(embodiment of gal code voltage generator)
Please referring next to Fig. 5, Fig. 5 is the circuit diagram of the display control program of the embodiment of the present invention.Control display system 5 to wrap
Include gal code voltage generator 51, source electrode drive circuit 52, control circuit 53 and backlight module 54.Control circuit 53 is electrically connected with gal
Code voltage generation circuit 51, source electrode drive circuit 52 and backlight module 54.
Gal code voltage generator 51 receives a system voltage AVDD, and according to its multiple concatenations resistance 112 with control
Multiple control signals of circuit 53 produce multiple gal code reference voltage VGMA_1～VGMA_N.Then, the source in display control program 5
The gray scale voltage generator 522 of pole drive circuit 52 is according to the multiple gal code reference voltage V receivedGMA_1～VGMA_NProduce ash
Rank voltage Vg1～Vgn。
Due to, gal code voltage generator 51 can be according to multiple voltage adjustment signal V of control circuit 531～VNWith enable
Select signal EN1～ENNAdjust produced gal code reference voltage VGMA_1～VGMA_N, therefore, different pre-set interval can be changed
The quantity of the multiple gray scale voltage values corresponding to sub-pixel grey decision-making, even can also move in parallel (move to left or move to right) gal code
Curve.
Gray scale voltage Vg1～VgiAccording to gal code reference voltage VGMA_1With VGMA_2Produced, and gray scale voltage Vgk～VgnAccording to
Gal code reference voltage VGMA_N-1With VGMA_NProduced.It addition, the producing method of other gray scale voltage the most in like manner can be according to two
Continuous print gal code reference voltage VGMA_i-1With VGMA_iProduced.
Control circuit 53 is in order to receive the sub-pixel grey decision-making of the sub-pixel of the multiple color of picture, and produces correspondence accordingly
Multiple control signals X1～XL, source electrode drive circuit 52 is according to control signal X receiving corresponding sub-pixel1～XL, and foundation
Each control signal X1～XLSelect gray scale voltage Vg1～VgnTherein one as the driving voltage Y of each corresponding sub-pixel1～YL,
To control the deflection of each corresponding liquid crystal.
In the embodiment of the present invention, control circuit 53 can add up the sub-pixel grey decision-making distribution situation of each color, and foundation
Each color sub-pixels grey decision-making distribution situation produces voltage adjustment signal V1～VNSignal EN is selected with enable1～ENN.So, logical
Cross the control of control circuit 53, gal code reference voltage V produced by gal code voltage generator 51GMA-1～VGMA_NCan be passive
State adjusts, to meet the trend of the sub-pixel grey decision-making distribution situation of the sub-pixel of current corresponding color.In other words, control circuit
53 by dynamically adjusting gal code reference voltage VGMA_1～VGMA_N, allow statistical magnitude the most (the relatively large person of ratio)
The quantity of gray scale voltage corresponding to multiple sub-pixel grey decision-making of pre-set interval increases, and allows the relatively small (ratio of statistical magnitude
Relatively small person) pre-set interval multiple sub-pixel grey decision-making corresponding to gray scale voltage quantity reduce.So, picture is right
Can be the most elevated with image quality than degree.
In addition, whether control circuit 53 also can have the situation of colour cast or scarce color to control backlight module 54 according to picture
The light and shade of the coloured light light source launched is strong and weak, to reach energy-conservation effect.Meanwhile, whether control circuit 53 all right foundation picture
The situation having colour cast or scarce color produces voltage adjustment signal V accordingly1～VNSignal EN is selected with enable1～ENN, with thereby
Deformation gamma curve.Then, the operating system of control circuit 53 or front end is also directed to the part of cross-color, compensates each color
The sub-pixel grey decision-making of pixel, so that the brightness that the sub-pixel grey decision-making of each color sub-pixels is showed draws high and is close to not
Brightness when light modulation is with deformation gamma curve.
As a example by the multiple coloured light light sources being had by backlight module 54 are red, green and blue coloured light light source, work as picture
Deflection is blue, and then red light source can be adjusted weak with time green, and the gamma curve of red sub-pixel simultaneously can be turned left deformation.Connect
, the operating system of control circuit 53 or front end is also directed to the part of cross-color, compensates the sub-pixel ash of each color sub-pixels
Rank are worth, so that the brightness that the sub-pixel grey decision-making of each color sub-pixels is showed draws high and is close to without light modulation and deformation gal
Brightness during code curve.
Gal code voltage generator 51 includes the resistance 512 of multiple concatenation, multiple buffer amplifier 514 and multiple numeral revolving dies
Intend transducer (digital-to-analog converter, DAC) 516.First reception system of the resistance 512 of multiple concatenations
System voltage AVDD, and its last be then electrically connected to ground voltage.The junction point of wantonly two adjacent resistance 512 is electrically connected with
The outfan of one corresponding buffer amplifier 514 with in order to export corresponding gal code reference voltage, and each buffer amplifier 514
Input be electrically connected with a corresponding DAC 516 outfan.
The input of each DAC 516 receives corresponding each voltage adjustment signal V1～VN, and to reply
Voltage adjustment signal V1～VNAfter carrying out digital-to-analogue conversion, output is to corresponding buffer amplifier 514.Each buffer amplifier 514
It is controlled by enable the most accordingly and selects signal EN1～ENN。
It addition, in other implementations, above-mentioned digital analog converter 516 can also use voltage switches to replace.
Voltage switches can be according to corresponding voltage adjustment signal V1～VNSelect therein the one of multiple voltage as output voltage to
Corresponding buffer amplifier 514.Briefly, any one can receive voltage adjustment signal and produce voltage signal accordingly
Control voltage generator all to can be used to replace above-mentioned digital analog converter 516.
(another embodiment of gamma curve method of adjustment)
Refer to the flow chart that Fig. 6, Fig. 6 are the gamma curve methods of adjustment of another embodiment of the present invention.The gal code of Fig. 6 is bent
Line method of adjustment is also in display control program, and it realizes by the way of hardware or software and hardware, and display controls system
System is for backlight or self-emission display apparatus, such as liquid crystal indicator or organic LED display device.In addition,
The gamma curve method of adjustment of Fig. 6 can also be in conjunction with the gamma curve method of adjustment of Fig. 3 in the lump in display control program.
First, in step s 601, by control circuit (for example, time schedule controller) or the front end of display control program
Operating system judge whether picture has a situation of scarce color or colour cast, such as by the son of the sub-pixel of each color of statistics picture
The distribution situation of pixel gray level value or statistical value judge colour cast or the situation of scarce color of picture.If picture has colour cast or scarce color
Situation, then perform step S602.If picture there is no any colour cast or the situation of scarce color, then terminate gamma curve method of adjustment.
Then, in step S602, by colour cast or the feelings of scarce color of the control circuit foundation picture of display control program
Condition, instruction backlight module adjusts the coloured light light source of weak part particular color.Then, in step S603, display control program is passed through
Control circuit control gal code reference voltage produced by gal code voltage generator, with the gamma curve of deformation particular color.So
After, in step s 604, by control circuit (for example, time schedule controller) or the operating system of front end of display control program,
For the part of cross-color, compensate the sub-pixel grey decision-making of each color sub-pixels, so that the sub-pixel ash of each color sub-pixels
The brightness that rank value is showed draws high and is close to without light modulation and brightness during deformation gamma curve.
Please referring next to Fig. 7, Fig. 7 is that the gal code after adjusting by the gamma curve method of adjustment of another embodiment of the present invention is bent
The curve chart of line.It is as a example by red, green and blue coloured light light source by the multiple coloured light light sources of the back of the body, when picture lacks redness, then
Red light source can be adjusted weak, and the gamma curve of simultaneously red sub-pixel can be turned left, and (gamma curve C711 moves to left and becomes in deformation
Gamma curve C712).Then, the operating system of control circuit or front end is also directed to the part of cross-color, compensates each color
The sub-pixel grey decision-making of pixel, so that the brightness that the sub-pixel grey decision-making of each color sub-pixels is showed draws high and is close to not
Brightness when light modulation is with deformation gamma curve.
Then, please referring next to Fig. 8, Fig. 8 is with after the gamma curve method of adjustment adjustment of another embodiment of the present invention
The curve chart of pixels statistics.In above-mentioned, control circuit 53 is by dynamically adjusting gal code reference voltage VGMA_1～VGMA_N, come
Allow statistical magnitude the most (the relatively large person of ratio) pre-set interval multiple sub-pixel grey decision-making corresponding to GTG, GTG
The quantity of voltage increases, and allows multiple sub-pixel GTGs of pre-set interval of statistical magnitude relatively small (the relatively small person of ratio)
The corresponding GTG of value, the quantity of gray scale voltage reduce.Therefore, such as pixels statistics curve N1 in figure, the most each number line is corresponding
For the grey decision-making before adjusting to number of pixels；Make the place that on state of is higher after adjustment as shown in phantom in FIG., there is more ash
Rank are worth, and so, the contrast of picture can be the most elevated with image quality.
Finally, please referring next to Fig. 9, Fig. 9 is with after the gamma curve method of adjustment adjustment of another embodiment of the present invention
Curve chart before and after pixels statistics adjustment.Wherein N2 is for adjusting preceding pixel statistic curve N2, has more dark-state.After adjustment,
Pixels statistics curve becomes N2 ', it can be seen that make grey decision-making increase, and the P point such as grey decision-making low in figure moves on to new high gray value
P’.The bright degree of backlight can be turned down thus, and then under identical display effect, reduce backlight power and damage
Consumption, to reach the purpose of power saving.
In sum, the gamma curve method of adjustment that the embodiment of the present invention is provided can be according to each pixel of picture with each
The distribution situation of sub-pixel grey decision-making, dynamically adjusts gamma curve, and to allow statistical magnitude, the most (ratio is relatively large
Person) pre-set interval multiple pixels and multiple sub-pixel grey decision-making corresponding to GTG, the quantity of gray scale voltage increase (that is,
Increase quantization degree), and allow multiple pixels of pre-set interval of statistical magnitude relatively small (the relatively small person of ratio) with multiple
GTG corresponding to sub-pixel grey decision-making, the quantity of gray scale voltage reduce (that is, reduce quantization degree).Therefore, described gal code is bent
Line method of adjustment can promote contrast and the image quality of picture effectively.
It addition, the embodiment of the present invention additionally provides a kind of gamma curve method of adjustment, it can be according to picture colour cast or scarce
The situation of color, adjusts the coloured light light source of weak part particular color, and deformation gamma curve, disappears thereby saving the energy of backlight module
Consumption.Then, described gamma curve method of adjustment is also directed to the part of cross-color, compensates the sub-pixel GTG of each color sub-pixels
Value, so that the brightness that the sub-pixel grey decision-making of each color sub-pixels is showed draws high and is close to without light modulation and deformation gal code
Brightness during curve.
In addition, the embodiment of the present invention also provides for a kind of framework simple gal code voltage generator, and it can be by control
Make and adjust produced multiple gal code reference voltages, so that the preset areas of statistical magnitude the most (the relatively large person of ratio)
Between multiple sub-pixel grey decision-making corresponding to the quantity of gray scale voltage increase, and making statistical magnitude, relatively small (ratio is relatively
Little person) pre-set interval multiple sub-pixel grey decision-making corresponding to the quantity of gray scale voltage reduce (that is, reduce quantization degree).
Even, in other embodiments, described gal code voltage generator can adjust produced multiple gal code references by controlling
Voltage, with deformation gamma curve.
The foregoing is only embodiments of the invention, it is also not used to limit to the scope of the patent claims of the present invention.
Claims (19)
1. a gamma curve method of adjustment, in a display control program of a display device, it is characterised in that including:
Analyze each pixel gray level value distribution situation of each picture and each sub-pixel grey decision-making distribution situation of each color；And it is right
Should each pixel gray level value distribution situation and each sub-pixel grey decision-making distribution situation of each this color, come according to this dynamically according to should
This sub-pixel grey decision-making distribution situation of pixel gray level value distribution situation and this color adjusts its at least one gal code reference voltage,
So that statistical magnitude is relatively many or multiple pixel gray level values of at least one pre-set interval of the relatively large person of ratio and sub-picture
Corresponding to element grey decision-making, the quantity of multiple GTGs increases, and makes statistical magnitude relatively small or at least the one of the relatively small person of ratio
The quantity of multiple GTGs corresponding to multiple pixel gray levels of pre-set interval and sub-pixel grey decision-making reduces；
Wherein said gamma curve method of adjustment further includes:
Judge whether this picture has the situation of scarce color or colour cast；
If this picture has colour cast or the situation of scarce color, dynamically adjust the coloured light light source of the multiple particular color of weak part；And
Change each gamma curve that respectively this particular color is corresponding.
2. gamma curve method of adjustment as claimed in claim 1, it is characterised in that each pixel gray level value adding up this picture divides
Cloth situation is to obtain each sub-pixel grey decision-making distribution situation of each color.
3. gamma curve method of adjustment as claimed in claim 2, it is characterised in that the relatively large number of pre-set interval of statistical magnitude
Multiple sub-pixel grey decision-making refer to its statistical magnitude more than multiple sub-pixel grey decision-making of one first specified threshold, or
Refer to its ratio multiple sub-pixel grey decision-making more than one first specific ratios；And the relatively small number of pre-set interval of statistical magnitude is many
Individual sub-pixel gray level value refers to its statistical magnitude multiple sub-pixel grey decision-making less than one second specified threshold, or refers to it
Ratio is less than multiple sub-pixel grey decision-making of the second specific ratios.
4. gamma curve method of adjustment as claimed in claim 1, it is characterised in that respectively this color include white, redness, blueness,
Green, cyan, purple, yellow and orange.
5. gamma curve method of adjustment as claimed in claim 1, it is characterised in that add up many height of each color of this picture
The sub-pixel grey decision-making distribution situation of pixel or statistical value judge colour cast or the situation of scarce color of this picture.
6. gamma curve method of adjustment as claimed in claim 1, it is characterised in that by adjusting at least one gal code reference voltage,
To change this gamma curve of this particular color.
7. gamma curve method of adjustment as claimed in claim 1, it is characterised in that further include:
For the part of cross-color, compensate multiple sub-pixel grey decision-making of each color sub-pixels, so that each color sub-pixels
The brightness that multiple sub-pixel grey decision-making are showed is close to without light modulation and brightness during deformation gamma curve.
8. a display device, has a display control program, it is characterised in that this display control program analyzes each picture
Each pixel gray level value distribution situation and each sub-pixel grey decision-making distribution situation of each color；And corresponding each pixel gray level Distribution value
Each sub-pixel grey decision-making distribution situation of situation and respectively this color, its gray-scale distribution is dynamically according to these pixel gray level Distribution value feelings
This sub-pixel grey decision-making distribution situation of condition and this color adjusts its at least one gal code reference voltage, so that statistical magnitude is relative
Multiple pixel gray level values of at least one pre-set interval of the relatively large person of more or ratio and multiple sub-pixel grey decision-making institute are right
The quantity of multiple GTGs should increase, and make statistical magnitude relatively small or at least one pre-set interval of the relatively small person of ratio is many
The quantity of multiple GTGs corresponding to individual pixel gray level value and multiple sub-pixel grey decision-making reduces；
Described display device is characterised by further including:
Judge whether this picture has the situation of scarce color or colour cast；
If this picture has colour cast or the situation of scarce color, dynamically adjust the coloured light light source of the multiple particular color of weak part；And
Change each gamma curve that respectively this particular color is corresponding.
9. display device as claimed in claim 8, it is characterised in that add up multiple sub-pixel GTGs of each color of this picture
Value falls within statistical magnitude and the statistics ratio of each pre-set interval, to obtain each sub-pixel grey decision-making distribution situation of each color.
10. display device as claimed in claim 9, it is characterised in that many height of the relatively large number of pre-set interval of statistical magnitude
Pixel gray level value refers to its statistical magnitude multiple sub-pixel grey decision-making more than one first specified threshold, or refers to its ratio
Multiple sub-pixel grey decision-making more than one first specific ratios；And multiple sub-pixels of the relatively small number of pre-set interval of statistical magnitude
Grey decision-making refers to its statistical magnitude multiple sub-pixel grey decision-making less than one second specified threshold, or refers to that its ratio is less than
Multiple sub-pixel grey decision-making of the second specific ratios.
11. display devices as claimed in claim 8, it is characterised in that respectively this color includes white, redness, blue green, green grass or young crops
Color, purple, yellow and orange.
12. display devices as claimed in claim 8, it is characterised in that add up the son of multiple sub-pixels of each color of this picture
Pixel gray level value distribution situation or statistical value judge colour cast or the situation of scarce color of this picture.
13. display devices as claimed in claim 8, it is characterised in that by adjusting at least one gal code reference voltage, to change
This gamma curve of this particular color.
14. display devices as claimed in claim 8, it is characterised in that further include:
For the part of cross-color, compensate multiple sub-pixel grey decision-making of each color sub-pixels, so that each color sub-pixels
The brightness that multiple sub-pixel grey decision-making are showed draws high and is close to without light modulation and many height picture during deformation gamma curve
The brightness that element grey decision-making is showed.
15. display devices as claimed in claim 8, it is characterised in that this display control program includes that a gal code voltage produces
Device, a source electrode drive circuit, a control circuit and a backlight module；
Wherein, this control circuit connects this gal code voltage generator, this source electrode drive circuit and this backlight module；This source drive
Circuit connects this gal code voltage generator；This gal code voltage generator produces multiple gray scale voltage values Vg1～Vgn。
16. display devices as claimed in claim 15, it is characterised in that this gal code voltage generator includes:
Multiple resistance, concatenated with one another, first resistance of the plurality of resistance wherein concatenated is electrically connected with a system voltage, concatenation
Last resistance of the plurality of resistance be electrically connected to a ground voltage, and the junction point of wantonly two adjacent resistors is in order to export
A corresponding gal code reference voltage；And
Multiple buffer amplifiers, the outfan of each buffer amplifier is electrically connected with the junction point of corresponding wantonly two adjacent resistors, and
Each buffer amplifier is selected the enable of signal institute by a corresponding enable；And
Multiple control voltage generators, each outfan controlling voltage generator is electrically connected with the input of corresponding buffer amplifier
End, each voltage adjustment signal controlling voltage generator reception corresponding produces a voltage signal.
17. display devices as claimed in claim 16, it is characterised in that the plurality of control voltage generator is multiple numeral moulds
Intend transducer or multiple voltage switches.
18. display devices as claimed in claim 15, it is characterised in that this control circuit is in order to receive the multiple color of picture
The sub-pixel grey decision-making of sub-pixel, and produce multiple control signals X of correspondence accordingly1～XL。
19. display devices as claimed in claim 18, it is characterised in that this source electrode drive circuit receives each control signal X1～XL
Select multiple gray scale voltage Vg1～VgnOne of them as the driving voltage Y of each corresponding sub-pixel1～YL, to control each correspondence
The deflection of liquid crystal, so that the brightness that the sub-pixel grey decision-making of each pixel is showed draws high and is close to without light modulation and deformation gal
The brightness that multiple sub-pixel grey decision-making during code curve are showed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310065817.2A CN104021767B (en) | 2013-03-01 | 2013-03-01 | Gamma curve method of adjustment and its gal code voltage generator and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310065817.2A CN104021767B (en) | 2013-03-01 | 2013-03-01 | Gamma curve method of adjustment and its gal code voltage generator and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104021767A CN104021767A (en) | 2014-09-03 |
| CN104021767B true CN104021767B (en) | 2016-12-28 |
Family
ID=51438493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310065817.2A Active CN104021767B (en) | 2013-03-01 | 2013-03-01 | Gamma curve method of adjustment and its gal code voltage generator and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104021767B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104952412B (en) * | 2015-07-15 | 2018-04-13 | 深圳市华星光电技术有限公司 | The driving method and driving device of liquid crystal panel |
| CN105096856B (en) * | 2015-07-23 | 2018-03-20 | 深圳市华星光电技术有限公司 | The driving method and drive device of liquid crystal panel |
| CN105185286B (en) * | 2015-08-26 | 2018-05-04 | 昆山龙腾光电有限公司 | A kind of method of adjustment and device of grayscale transition |
| CN105263010B (en) * | 2015-11-26 | 2017-06-06 | 深圳市华星光电技术有限公司 | A kind of auto white balance method and system |
| CN105741762B (en) * | 2016-03-31 | 2018-01-30 | 深圳市华星光电技术有限公司 | The method for eliminating OLED display panel Mura |
| CN107742508B (en) * | 2017-11-03 | 2020-02-07 | 惠科股份有限公司 | Driving method and driving device of display device |
| CN108053797B (en) * | 2017-12-20 | 2019-12-13 | 惠科股份有限公司 | driving method and driving device of display device |
| CN107863084B (en) * | 2017-12-20 | 2019-12-13 | 惠科股份有限公司 | Driving method and driving device of display device |
| CN107863083B (en) * | 2017-12-20 | 2019-12-13 | 惠科股份有限公司 | Driving method and driving device of display device |
| CN107978289B (en) * | 2017-12-20 | 2020-02-21 | 惠科股份有限公司 | Driving method and driving device of display device |
| CN110164377B (en) * | 2018-08-30 | 2021-01-26 | 京东方科技集团股份有限公司 | Gray scale voltage adjusting device and method and display device |
| CN109192174B (en) * | 2018-11-05 | 2020-05-05 | 惠科股份有限公司 | Driving method and driving device of display panel and display device |
| CN110379396B (en) * | 2019-06-17 | 2022-03-25 | 北京集创北方科技股份有限公司 | Gamma voltage generation method, generation circuit, source electrode driving circuit, driving chip and display device |
| CN111028763B (en) * | 2020-01-02 | 2022-10-11 | 昆山国显光电有限公司 | Gamma reference voltage adjusting method, adjusting circuit and display panel |
| CN111415616B (en) | 2020-04-27 | 2021-04-13 | 京东方科技集团股份有限公司 | Method for improving picture display quality, time sequence controller and display device |
| CN111968594B (en) * | 2020-09-08 | 2022-04-15 | 京东方科技集团股份有限公司 | Display driving method, display driving system and display device |
| CN112908240B (en) * | 2021-02-22 | 2022-04-15 | 昆山国显光电有限公司 | Gamma debugging method, device and equipment |
| CN114399980B (en) * | 2021-12-21 | 2023-05-30 | Tcl华星光电技术有限公司 | Working voltage determining method and device and display device |
| CN117174025A (en) * | 2023-09-12 | 2023-12-05 | 苇创微电子(上海)有限公司 | Driving module for improving OLED display image quality and method for improving image quality |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1534359A (en) * | 2003-03-31 | 2004-10-06 | 京东方显示器科技公司 | Liquid crystal display device |
| CN1770250A (en) * | 2004-11-03 | 2006-05-10 | 中华映管股份有限公司 | Dynamic tone compensation circuit and dynamic tone compensation method |
| CN1797533A (en) * | 2004-12-29 | 2006-07-05 | Lg.菲利浦Lcd株式会社 | Method and apparatus for driving liquid crystal dispaly device |
| CN101170642A (en) * | 2006-10-26 | 2008-04-30 | 深圳Tcl工业研究院有限公司 | A dynamically video image processing method and method for identifying video image gray distribution |
| CN101295472A (en) * | 2007-04-24 | 2008-10-29 | 北京京东方光电科技有限公司 | LCD device high dynamic contrast processing equipment and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004302311A (en) * | 2003-03-31 | 2004-10-28 | Samsung Sdi Co Ltd | Contrast correction circuit |
| US8179345B2 (en) * | 2003-12-17 | 2012-05-15 | Samsung Electronics Co., Ltd. | Shared buffer display panel drive methods and systems |
-
2013
- 2013-03-01 CN CN201310065817.2A patent/CN104021767B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1534359A (en) * | 2003-03-31 | 2004-10-06 | 京东方显示器科技公司 | Liquid crystal display device |
| CN1770250A (en) * | 2004-11-03 | 2006-05-10 | 中华映管股份有限公司 | Dynamic tone compensation circuit and dynamic tone compensation method |
| CN1797533A (en) * | 2004-12-29 | 2006-07-05 | Lg.菲利浦Lcd株式会社 | Method and apparatus for driving liquid crystal dispaly device |
| CN101170642A (en) * | 2006-10-26 | 2008-04-30 | 深圳Tcl工业研究院有限公司 | A dynamically video image processing method and method for identifying video image gray distribution |
| CN101295472A (en) * | 2007-04-24 | 2008-10-29 | 北京京东方光电科技有限公司 | LCD device high dynamic contrast processing equipment and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104021767A (en) | 2014-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104021767B (en) | Gamma curve method of adjustment and its gal code voltage generator and display device | |
| TWI506609B (en) | Method for adjusting gamma curve and gamma voltage generator and display control system therof | |
| CN108022565B (en) | Adjusting method and display | |
| CN101188093B (en) | Liquid crystal display and driving method thereof | |
| CN106991972B (en) | A kind of booting brightness control method of organic luminous panel | |
| CN101383126B (en) | Method and apparatus for processing digital image to be displayed on display device with backlight module | |
| US20100033456A1 (en) | Display device and display method thereof | |
| CN209249057U (en) | Driving circuit of display panel and display device | |
| CN110379368A (en) | The driving method of pulsewidth and voltage hybrid modulation, driving device and display device | |
| CN105185291B (en) | display drive method, device and display device | |
| KR20120002704A (en) | Driving circuit for liquid crystal display device and method for driving the same | |
| JP2010033055A (en) | Method of boosting display image, controller unit for performing the method, and display apparatus having the controller unit | |
| JP2009271499A (en) | Backlight drive circuit and method for driving the same | |
| CN103517015A (en) | Display unit, image processing unit, and display method | |
| KR101591652B1 (en) | Liquid crystal display and driving method of the same | |
| TW201106326A (en) | Timing controller utilized in display device and method thereof | |
| CN101632115A (en) | Luminance adjustment in a display device | |
| KR101492530B1 (en) | Liquid crystal display and driving method of the same | |
| KR20110106179A (en) | Method of dimming backlight assembly | |
| WO2020238038A1 (en) | Driving method and apparatus for light-emitting element | |
| TWI796865B (en) | Gamma debugging method and gamma debugging device for display panel | |
| KR101818213B1 (en) | Driving device and display device including the same | |
| KR101327835B1 (en) | Driving circuit for liquid crystal display device and method for driving the same | |
| CN103903545A (en) | Driving circuit of display device and method for driving the same | |
| TWI747557B (en) | Apparatus for performing brightness enhancement in display module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200119 Address after: 408, East Building, digital cultural industry base, Shennan Avenue, Nantou street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Yi Jia Ren Technology Co. Ltd. Address before: Hsinchu County, Taiwan, China Patentee before: Liu Hongda |
|
| TR01 | Transfer of patent right |