CN102629452B - Method and apparatus for adjusting Gamma curve - Google Patents
Method and apparatus for adjusting Gamma curve Download PDFInfo
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- CN102629452B CN102629452B CN 201110092478 CN201110092478A CN102629452B CN 102629452 B CN102629452 B CN 102629452B CN 201110092478 CN201110092478 CN 201110092478 CN 201110092478 A CN201110092478 A CN 201110092478A CN 102629452 B CN102629452 B CN 102629452B
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Abstract
The invention discloses a method and an apparatus for adjusting a Gamma curve, thereby improving consistency of photoelectric properties of different liquid crystal displays of same liquid crystal display products and ensuring display qualities of the liquid crystal displays. The method for adjusting a gamma curve comprises the following steps: detecting a change of a ratio W/L of width W to space L of a pixel electrode model that is manufactured while a pixel electrode is manufactured, wherein the width W of the pixel electrode model is identical with that of the pixel electrode and the space L of the pixel electrode model is identical with that of the pixel electrode; and adjusting a Gamma curve according to the change of the ratio W/L.
Description
Technical field
The present invention relates to the LCD Technology field, relate in particular to a kind of gamma (Gamma, reference voltage) curve method of adjustment and device.
Background technology
The lcd technology of senior super dimension field switch (AD-SDS, Advanced-Super Dimensional Switching), the figure of its pixel electrode, as shown in Figure 1, wherein, W represents the wide cut of transparency electrode in the pixel electrode, and l represents the spacing of transparency electrode in the pixel electrode.
In Fig. 1, transparency electrode is arranged with identical spacing (l) with equal wide cut (W), utilize the pixel electrode edge produces in the same plane parallel electric field and pixel electrode layer and the longitudinal electric field formation hyperspace compound field to producing between electrode layer, make in the liquid crystal cell between pixel electrode, all aligned liquid-crystal molecules of directly over the electrode and liquid crystal cell top can both produce the rotation conversion, thereby to have improved planar orientation be the liquid crystal work efficiency and increased light transmission efficiency.When the ratio W/l of wide cut (W) and spacing (l) changes, the relation curve of the transmitance of the pixel of pixel electrode and the driving voltage of pixel electrode will change, as shown in Figure 2.
Because in the manufacturing of liquid crystal display reality, W/l deviation can occur in the surplus (margin) of certain technique, to cause different photoelectric characteristics occurring with different LCD in a product when departure is larger, this will reduce the display quality of product.
Summary of the invention
The embodiment of the invention provides a kind of Gamma curve method of adjustment and device, in order to improve the consistance with the photoelectric characteristic of different LCD in a lcd products, guarantees the display quality of liquid crystal display.
A kind of Gamma curve method of adjustment that the embodiment of the invention provides comprises:
The variation of the wide cut W of the pixel electrode model that detection and pixel electrode are made simultaneously and the ratio W/l of spacing l, wherein the pixel electrode model is identical with the wide cut W of pixel electrode, and spacing l is also identical;
According to the variation of W/l, adjust the Gamma curve.
A kind of Gamma curve adjusting apparatus that the embodiment of the invention provides comprises:
Change detecting unit, for detection of the variation of the ratio W/l of the wide cut W of the pixel electrode model of making simultaneously with pixel electrode and spacing l, wherein the pixel electrode model is identical with the wide cut W of pixel electrode, and spacing l is also identical;
Adjustment unit is used for the variation according to W/l, adjusts the Gamma curve.
The embodiment of the invention, the variation of the wide cut W of the pixel electrode model that detection and pixel electrode are made simultaneously and the ratio W/l of spacing l, wherein the pixel electrode model is identical with the wide cut W of pixel electrode, and spacing l is also identical; According to the variation of W/l, adjust the Gamma curve.Therefore, variation by assessment pixel electrode W/l, and then avoid the changing value of pixel electrode W/l on the impact of liquid crystal display optical characteristics, especially for the AD-SDS display mode, during driving voltage under setting different GTGs, can be with reference to the departure of W/l, and adjust the driving voltage of pixel electrode and the relation curve of GTG, thus optimize the display effect of different display panels.
Description of drawings
Fig. 1 is the pictorial diagram of pixel electrode;
Fig. 2 is the light transmission rate of liquid crystal display and the relation curve synoptic diagram of driving voltage;
The structural representation of the Gamma curve adjusting apparatus that Fig. 3 provides for the embodiment of the invention;
The signal input port that Fig. 4 provides for the embodiment of the invention, signal output port, input connect cabling, are connected the position view of cabling on liquid crystal display with pixel electrode model (TEG) that pixel electrode is made simultaneously with being connected;
A kind of TEG synoptic diagram that Fig. 5 provides for the embodiment of the invention;
The another kind of TEG synoptic diagram that Fig. 6 provides for the embodiment of the invention;
The schematic flow sheet of the Gamma curve method of adjustment that Fig. 7 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of Gamma curve method of adjustment and device, in order to improve the consistance with the photoelectric characteristic of different LCD in a lcd products, guarantees the display quality of liquid crystal display.
In order to remedy the W/l deviation to the impact of the relation curve of the light transmission rate of liquid crystal display and driving voltage, the deviation of embodiment of the invention assessment W/l, thereby according to the deviation of W/l, adjust the driving voltage of pixel electrode and the relation curve (being the Gamma curve) of GTG.
Wherein, described GTG is the parameter that represents the brightness of liquid crystal display, and GTG is higher, and brightness is higher, and GTG is lower, and brightness is less.
Referring to Fig. 3, a kind of gamma Gamma curve adjusting apparatus that the embodiment of the invention provides comprises:
Change detecting unit 101, for detection of the variation of the ratio W/l of the wide cut W of the pixel electrode model of making simultaneously with pixel electrode and spacing l, wherein the pixel electrode model is identical with the wide cut W of pixel electrode, and spacing l is also identical;
Described pixel electrode model as its name suggests, is the model of the pixel electrode among the LCD, is used for the analog pixel electrode, and makes simultaneously with pixel electrode, so the pixel electrode model is identical with the wide cut W of pixel electrode, and spacing l is also identical.
Preferably, described variation detecting unit 101, the variation of the W/l of pixel electrode model is determined in the variation of the impedance by detecting the pixel electrode model.
Preferably, described variation detecting unit 101 comprises: signal input unit 201, signal input port 202, input connect cabling 203, pixel electrode model 204, output connection cabling 205, signal output port 206 and detecting signal unit 207;
Wherein, signal input port 202 connects the end that cabling 203 connects pixel electrode model 204 by input, and the other end of pixel electrode model 204 connects cabling 205 by output and connects signal output port 206;
Detecting signal unit 207, the level signal of detection signal output port 206 outputs is with respect to the variable quantity of fiduciary level signal; With the level signal of the signal output port 206 output variable quantity with respect to the fiduciary level signal, as the variable quantity of the W/l of pixel electrode model, and export to adjustment unit 102.
Preferably, described pixel electrode model 204 sets in advance on the array base palte of liquid crystal display LCD; Described signal input port 202 and signal output port 206 set in advance on signal substrate.
Preferably, described adjustment unit 102 when the variable quantity of W/l during greater than the threshold value that sets in advance, is adjusted the Gamma curve.
A kind of liquid crystal display that the embodiment of the invention provides comprises above-mentioned gamma Gamma curve adjusting apparatus.
Preferably, each liquid crystal display comprises one or more gamma Gamma curve adjusting apparatus.
The technical scheme that the embodiment of the invention provides by the variation of assessment pixel electrode W/l, and then avoids the changing value of pixel electrode W/l on the impact of liquid crystal display optical characteristics.In brief, namely when adopting a certain voltage that pixel electrode is driven, the light transmission rate when W/l=a1 is b1, and the light transmission rate when W/l=a2 is b2; Identical in order to guarantee the light transmission rate under a certain GTG, need to adopt different driving voltages with W/l=a2 to W/l=a1; Therefore, when corresponding A D-SDS display mode, driving voltage under setting different GTGs, preferably can be referenced to the departure of W/l, and the Gamma curve is adjusted.
Shown in Figure 4, the signal input port that provides for the embodiment of the invention, signal output port, input connect cabling, pixel electrode model (TEG) and be connecteds and connect the position view of cabling on liquid crystal display, comprise among Fig. 4: signal substrate 1, flexibly connect section's material 2, LCD array base palte 3, signal input port 4, input and connect cabling 5, TEG 6, export connection cabling 7, signal output port 8.
Wherein, flexibly connect section's material 2, be existing parts for connecting signal substrate 1 and LCD array base palte 3.
Have signal input port 4 at signal substrate 1, this signal input port 4 is connected cabling 5 connections with TEG 6 on LCD array base palte 3 by input; TEG 6 connects cabling 7 by output and is connected with signal output port 8 on signal substrate 1; Input connects cabling 5 and is connected cabling 7 process signal substrates 1 with output, flexibly connects section's material 2 and LCD array base palte 3.
Wherein, the figure of TEG 6 can be arranged to figure as shown in Figure 5, and this figure is formed by transparency electrode, and its wire spoke is identical with the wide cut of pixel electrode, and the spacing in its U-shaped zone is identical with the spacing of pixel electrode; The transparency electrode of this figure is produced simultaneously with pixel electrode, therefore, has guaranteed the transparency electrode of this figure and the consistance of pixel electrode, that is to say that the variation of the W/l of the transparency electrode of this figure is consistent with the variation of the W/l of pixel electrode.
The transparency electrode of this TEG 6 is formed by connecting by many U-shaped bendings, supposes that this TEG 6 is a (being the impedance of TEG 6) with inputting the connecting portion that is connected cabling 5 to the resistance value that is connected the connecting portion of cabling 7 with output; The resistance value that total input connects cabling 5 is b; The resistance value that total output connects cabling 7 is c.
Wherein, preferably, can set in advance a greater than b+c.Can in feedback pixel electrode wide cut (W) and spacing (l) ratio, possess space, less distribution area (layout) like this.And resistance value arranges a greater than b+c, can improve the feedback capability of this TEG 6, namely when W/l changes, can embody well the variation of W/l.
Certainly, a also not necessarily is greater than b+c.The value of a, b, c generally arrives between the hundreds of Europe in tens Europe, and occurrence can arrange according to actual needs.
In addition, the figure of TEG 6 also can be arranged to figure as shown in Figure 6, and this TEG 6 is formed by transparency electrode, and its wire spoke is identical with the wide cut of pixel electrode, and the electrode separation that its horizontal direction is arranged is identical with the spacing of pixel electrode; Have the δ angle on the electrode of arranging on its horizontal direction and the horizontal direction, this angle is spent less than 90 greater than 0 degree; This figure is formed by connecting by many bendings.
Suppose that TEG 6 is a (being the impedance of TEG 6) with inputting the connecting portion that is connected cabling 5 to the resistance value that is connected the connecting portion of cabling 7 with output; The resistance value that total input connects cabling 5 is b; The resistance value that total output connects cabling 7 is c.In like manner, a can be set greater than b+c.
Because the practical application of AD-SDS pattern is when product, consider the lifting of response speed, also there are an angle in the electrode that its pixel electrode is arranged in the horizontal direction and horizontal direction, use TEG6 shown in Figure 6, more accurately the ratio of feedback pixel transparency electrode wide cut (W) and spacing (l).And resistance value arranges a greater than b+c, can improve the feedback capability of this TEG 6.
No matter adopt the TEG of above-mentioned Fig. 5 or that a kind of shape of Fig. 6, can adjust the Gamma curve in the following way:
In a signal input port input constant voltage (this voltage generally below 36V, can be set to 3.3V) level signal, this level signal is connected cabling through input connection cabling, TEG with output, exports by signal output port.
When the transparency electrode W/l among the TEG deviation occurred in the margin of certain technique, deviation also can occur in the impedance of this TEG thereupon; During the TEG impedance deviation, the level signal of signal output port output also can change; By the level signal that detects at signal output port, can assess the departure of transparency electrode W/l; Therefore, by the variation of the level signal that detects at signal output port, the relation of capable of regulating Gamma voltage and GTG, thus obtain better display effect.
Wherein, when W/l became large, the level signal that detects at signal output port can become large; When W/l diminished, the level signal that detects at signal output port can diminish.During greater than the threshold value that sets in advance, adjust the Gamma curve at the variable quantity of W/l, specifically how to adjust the Gamma curve, can decide according to actual conditions.
Can by adjusting Gamma voltage, adjust the Gamma curve.
The Gamma value of general Gamma curve is 2.2, and by adjusting Gamma voltage, so that the Gamma value of Gamma curve remains 2.2, error is between positive 0.2 and negative 0.2.
The Gamma curve has embodied the sensation of people to brightness, therefore keeps the Gamma value of Gamma curve constant, or the scope that changes has then guaranteed the display effect of display in admissible scope.
To sum up, referring to Fig. 7, a kind of gamma Gamma curve method of adjustment that the embodiment of the invention provides comprises step:
The variation of the wide cut W of the pixel electrode model that S101, detection and pixel electrode are made simultaneously and the ratio W/l of spacing l, wherein the pixel electrode model is identical with the wide cut W of pixel electrode, and spacing l is also identical;
S102, according to the variation of W/l, adjust the Gamma curve.
Preferably, detect the variation of the W/l of described pixel electrode model, comprising:
The variation of the W/l of pixel electrode model is determined in the variation of the impedance by detecting the pixel electrode model.
Preferably, the variation of the W/l of pixel electrode model is determined in the described variation of passing through the impedance of detection pixel electrode model, comprising:
Signal input port input constant voltage level signal at the pixel electrode model;
The level signal of the signal output port output of detection pixel electrode model is with respect to the variable quantity of fiduciary level signal;
With the level signal of the signal output port output variable quantity with respect to the fiduciary level signal, as the variable quantity of the W/l of pixel electrode model;
Wherein, signal input port connects the end that cabling connects the pixel electrode model by input, and the other end of pixel electrode model connects cabling by output and connects signal output port.
Preferably, described pixel electrode model sets in advance on the array base palte of liquid crystal display LCD; Described signal input port and signal output port set in advance on signal substrate.
Preferably, the Gamma curve is adjusted in described variation according to W/l, comprising:
When the variable quantity of W/l during greater than the threshold value that sets in advance, adjust the Gamma curve.
This shows that the embodiment of the invention has signal input port at signal substrate, this signal input port is connected the cabling connection with TEG on the LCD array base palte by input; TEG connects cabling by output and is connected with signal output port on signal substrate; Input connects cabling and is connected cabling through signal substrate with output, flexibly connects section's material and LCD array base palte.In constant voltage level signal of signal input port input; Level signal is connected cabling through input connection cabling, TEG with output, exports by signal output port; When the transparency electrode W/l among the TEG can deviation occur in the surplus (margin) of certain technique, deviation also can occur in the impedance of this TEG thereupon, and outputs level signals changes; The variation of the level signal that detects at signal output port can be assessed the departure of transparency electrode W/l, thereby adjusts the relation of Gamma voltage and GTG, assurance LCD display quality.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, complete implement software example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disk memory and optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to process flow diagram and/or the block scheme of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block scheme and/or square frame and process flow diagram and/or the block scheme and/or the combination of square frame.Can provide these computer program instructions to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device producing a machine, so that the instruction of carrying out by the processor of computing machine or other programmable data processing device produces the device of the function that is used for being implemented in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, so that the instruction that is stored in this computer-readable memory produces the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame.
These computer program instructions also can be loaded on computing machine or other programmable data processing device, so that carry out the sequence of operations step producing computer implemented processing at computing machine or other programmable devices, thereby be provided for being implemented in the step of the function of appointment in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame in the instruction that computing machine or other programmable devices are carried out.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. gamma Gamma curve method of adjustment is characterized in that the method comprises:
The variation of the wide cut W of the pixel electrode model that detection and pixel electrode are made simultaneously and the ratio W/l of spacing l, wherein the pixel electrode model is identical with the wide cut W of pixel electrode, and spacing l is also identical;
According to the variation of W/l, adjust the Gamma curve;
Wherein, detect the variation of the W/l of described pixel electrode model, comprising:
Signal input port input constant voltage level signal at the pixel electrode model;
The level signal of the signal output port output of detection pixel electrode model is with respect to the variable quantity of fiduciary level signal;
With the level signal of the signal output port output variable quantity with respect to the fiduciary level signal, as the variable quantity of the W/l of pixel electrode model;
Wherein, signal input port connects the end that cabling connects the pixel electrode model by input, and the other end of pixel electrode model connects cabling by output and connects signal output port.
2. method according to claim 1 is characterized in that, described pixel electrode model sets in advance on the array base palte of liquid crystal display LCD; Described signal input port and signal output port set in advance on signal substrate.
3. method according to claim 1 is characterized in that, the Gamma curve is adjusted in described variation according to W/l, comprising:
When the variable quantity of W/l during greater than the threshold value that sets in advance, adjust the Gamma curve.
4. gamma Gamma curve adjusting apparatus is characterized in that this device comprises:
Change detecting unit, for detection of the variation of the ratio W/l of the wide cut W of the pixel electrode model of making simultaneously with pixel electrode and spacing l, wherein the pixel electrode model is identical with the wide cut W of pixel electrode, and spacing l is also identical;
Adjustment unit is used for the variation according to W/l, adjusts the Gamma curve;
Wherein, described variation detecting unit comprises: signal input unit, detecting signal unit, pixel electrode model, signal input port, signal output port, input connect cabling and connect cabling with being connected;
Signal input port connects the end that cabling connects the pixel electrode model by input, and the other end of pixel electrode model connects cabling by output and connects signal output port;
Signal input unit is in signal input port input constant voltage level signal;
Detecting signal unit, the level signal of detection signal output port output is with respect to the variable quantity of fiduciary level signal; With the level signal of the signal output port output variable quantity with respect to the fiduciary level signal, as the variable quantity of the W/l of pixel electrode model, and export to adjustment unit.
5. device according to claim 4 is characterized in that, described pixel electrode model sets in advance on the array base palte of liquid crystal display LCD; Described signal input port and signal output port set in advance on signal substrate.
6. device according to claim 4 is characterized in that, described adjustment unit when the variable quantity of W/l during greater than the threshold value that sets in advance, is adjusted the Gamma curve.
7. a liquid crystal display is characterized in that, comprises the described gamma Gamma of the arbitrary claim of claim 4 to 6 curve adjusting apparatus.
8. liquid crystal display according to claim 7 is characterized in that, each liquid crystal display comprises a plurality of described gamma Gamma curve adjusting apparatus.
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| CN 201110092478 CN102629452B (en) | 2011-04-13 | 2011-04-13 | Method and apparatus for adjusting Gamma curve |
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| CN 201110092478 CN102629452B (en) | 2011-04-13 | 2011-04-13 | Method and apparatus for adjusting Gamma curve |
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| CN102629452B true CN102629452B (en) | 2013-10-16 |
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| CN108490652B (en) * | 2018-02-09 | 2020-05-22 | 深圳市华星光电半导体显示技术有限公司 | Gamma automatic adjustment method and system |
| CN108597442B (en) * | 2018-04-13 | 2019-12-06 | 武汉精测电子集团股份有限公司 | OLED module Gamma adjustment method and system based on multi-target association mathematical model |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1677181A (en) * | 2004-03-31 | 2005-10-05 | 夏普株式会社 | Liquid crystal display device, driving method therefor and electronic equipment |
| CN101369411A (en) * | 2005-08-18 | 2009-02-18 | 索尼株式会社 | Display |
| CN101957527A (en) * | 2009-07-20 | 2011-01-26 | 北京京东方光电科技有限公司 | FFS (Free Fall Sensor) type TFT-LCD (Thin Film Transistor-Liquid Crystal Display) array substrate and manufacture method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4799505B2 (en) * | 2007-08-03 | 2011-10-26 | 株式会社 日立ディスプレイズ | Liquid crystal display |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1677181A (en) * | 2004-03-31 | 2005-10-05 | 夏普株式会社 | Liquid crystal display device, driving method therefor and electronic equipment |
| CN101369411A (en) * | 2005-08-18 | 2009-02-18 | 索尼株式会社 | Display |
| CN101957527A (en) * | 2009-07-20 | 2011-01-26 | 北京京东方光电科技有限公司 | FFS (Free Fall Sensor) type TFT-LCD (Thin Film Transistor-Liquid Crystal Display) array substrate and manufacture method thereof |
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