CN102629452A - Method and apparatus for adjusting Gamma curve - Google Patents
Method and apparatus for adjusting Gamma curve Download PDFInfo
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- CN102629452A CN102629452A CN2011100924788A CN201110092478A CN102629452A CN 102629452 A CN102629452 A CN 102629452A CN 2011100924788 A CN2011100924788 A CN 2011100924788A CN 201110092478 A CN201110092478 A CN 201110092478A CN 102629452 A CN102629452 A CN 102629452A
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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 ultra dimension field switch (AD-SDS, Advanced-Super Dimensional Switching), its pattern of pixel electrodes; As shown in Figure 1; Wherein, the wide cut of transparency electrode in the W remarked pixel electrode, the spacing of transparency electrode in the l remarked pixel electrode.
In Fig. 1; Transparency electrode is arranged with identical spacing (l) with equal wide cut (W); The parallel electric field and pixel electrode layer and the longitudinal electric field formation hyperspace compound field that utilize same plane interior pixel electrode edge to be produced to producing between electrode layer; Make between liquid crystal cell interior pixel electrode, directly over the electrode and all aligned liquid-crystal molecules of 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, and will be as shown in Figure 2.
Because in actual the manufacturing of LCD; W/l deviation can occur in the surplus (margin) of certain technology; Different photoelectric characteristics appears in different LCD in when departure is big, will causing with a product, and 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 LCD.
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 processed 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, adjustment Gamma curve.
A kind of Gamma curve adjusting apparatus that the embodiment of the invention provides comprises:
The change-detection unit is used to detect the variation of ratio W/l of wide cut W and the spacing l of the pixel electrode model of processing simultaneously with pixel electrode, and 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, adjustment 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 processed 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, adjustment Gamma curve.Therefore; Through the variation of assessment pixel electrode W/l, and then avoid of the influence of the changing value of pixel electrode W/l, especially for the AD-SDS display mode to the LCD optical characteristics; During driving voltage under setting different GTGs; Can be with reference to the departure of W/l, and the driving voltage of adjustment pixel electrode and the relation curve of GTG, thus optimize the display effect of different display panels.
Description of drawings
Fig. 1 is the pattern of pixel electrodes synoptic diagram;
Fig. 2 is the light transmission rate of LCD 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 LCD with pixel electrode model (TEG) that pixel electrode is processed simultaneously with exporting;
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 LCD.
In order to remedy of the influence of W/l deviation to the relation curve of the light transmission rate of LCD and driving voltage; The deviation of embodiment of the invention assessment W/l; Thereby according to the deviation of W/l, the driving voltage of adjustment pixel electrode and the relation curve (being the Gamma curve) of GTG.
Wherein, said GTG is that GTG is high more in order to the parameter of the brightness of expression LCD, and brightness is high more, and GTG is low more, and brightness is more little.
Referring to Fig. 3, a kind of gamma Gamma curve adjusting apparatus that the embodiment of the invention provides comprises:
Change-detection unit 101 is used to detect the variation of ratio W/l of wide cut W and the spacing l of the pixel electrode model of processing simultaneously with pixel electrode, and wherein the pixel electrode model is identical with the wide cut W of pixel electrode, and spacing l is also identical;
Said pixel electrode model as its name suggests, is the model of the pixel electrode among the LCD, be used for the analog pixel electrode, and process 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, said change-detection unit 101, the variation of the W/l of pixel electrode model is confirmed in the variation of the impedance through detecting the pixel electrode model.
Preferably, said change-detection 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 through input, and the other end of pixel electrode model 204 connects cabling 205 through 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 signal output port 206 output variable quantity,, and export to adjustment unit 102 as the variable quantity of the W/l of pixel electrode model with respect to the fiduciary level signal.
Preferably, said pixel electrode model 204 is arranged on the array base palte of LCD LCD in advance; Said signal input port 202 is arranged on the signal substrate with signal output port 206 in advance.
Preferably, said adjustment unit 102, when the variable quantity of W/l during greater than the threshold value that is provided with in advance, adjustment Gamma curve.
A kind of LCD that the embodiment of the invention provides comprises above-mentioned gamma Gamma curve adjusting apparatus.
Preferably, each LCD comprises one or more gamma Gamma curve adjusting apparatus.
The technical scheme that the embodiment of the invention provides through the variation of assessment pixel electrode W/l, and then is avoided the influence of the changing value of pixel electrode W/l to the LCD optical characteristics.In brief, promptly 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 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 output and are connected the position view of cabling on LCD, comprise among Fig. 4: signal substrate 1, flexibly connect portion'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 portion's material 2, be the existing parts that are used to connect signal substrate 1 and LCD array base palte 3.
On signal substrate 1, have signal input port 4, this signal input port 4 is connected cabling 5 connections with TEG 6 on LCD array base palte 3 through input; TEG 6 connects cabling 7 through 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 portion'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 with pixel electrode simultaneously, 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 many U-shaped bendings, supposes that this TEG 6 is a (being the impedance of TEG 6) with importing 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 a be set in advance 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 is provided with a greater than b+c, can improve the feedback capability of this TEG 6, promptly when W/l changes, can embody the variation of W/l well.
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 be provided with 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 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 many bendings.
Suppose that TEG 6 is a (being the impedance of TEG 6) with importing 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 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 is provided with 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 through following mode:
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 through signal output port.
When the transparency electrode W/l among the TEG deviation occurred in the margin of certain technology, deviation also can take place in the impedance of this TEG thereupon; During TEG impedance deviation, the level signal of signal output port output also can change; Through the level signal that detects at signal output port, can assess the departure of transparency electrode W/l; Therefore, through the variation of the level signal that detects at signal output port, can adjust the relation of Gamma voltage and GTG, thereby obtain better display effect.
Wherein, when W/l became big, the level signal that detects at signal output port can become big; When W/l diminished, the level signal that detects at signal output port can diminish.During greater than the threshold value that is provided with in advance, how adjustment Gamma curve specifically adjusts the Gamma curve, can decide according to actual conditions at the variable quantity of W/l.
Can adjust the Gamma curve through adjustment Gamma voltage.
The Gamma value of general Gamma curve is 2.2, through adjustment Gamma voltage, makes the Gamma value of Gamma curve remain 2.2, and 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 processed 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, adjustment Gamma curve.
Preferably, detect the variation of the W/l of said pixel electrode model, comprising:
The variation of the W/l of pixel electrode model is confirmed in the variation of the impedance through detecting the pixel electrode model.
Preferably, the variation of the W/l of pixel electrode model is confirmed in the said 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 signal output port output variable quantity, as the variable quantity of the W/l of pixel electrode model with respect to the fiduciary level signal;
Wherein, signal input port connects the end that cabling connects the pixel electrode model through input, and the other end of pixel electrode model connects cabling through output and connects signal output port.
Preferably, said pixel electrode model is arranged on the array base palte of LCD LCD in advance; Said signal input port and signal output port are arranged on the signal substrate in advance.
Preferably, said variation according to W/l, adjustment Gamma curve comprises:
When the variable quantity of W/l during greater than the threshold value that is provided with in advance, adjustment Gamma curve.
This shows that the embodiment of the invention has signal input port on signal substrate, this signal input port is connected the cabling connection with TEG on the LCD array base palte through input; TEG connects cabling through 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 portion'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 through signal output port; When the transparency electrode W/l among the TEG can deviation occur in the surplus (margin) of certain technology, deviation also can take place 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, thus the relation of adjustment 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 the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that 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 go up the computer program of implementing.
The present invention is that reference is described according to the 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 to produce a machine, make the instruction of carrying out through the processor of computing machine or other programmable data processing device produce to be used for the device of the function that is 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 ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce 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; Make on computing machine or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computing machine or other programmable devices, carrying out is 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.
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, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. gamma Gamma curve method of adjustment is characterized in that this method comprises:
The variation of the wide cut W of the pixel electrode model that detection and pixel electrode are processed 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, adjustment Gamma curve.
2. method according to claim 1 is characterized in that, detects the variation of the W/l of said pixel electrode model, comprising:
The variation of the W/l of pixel electrode model is confirmed in the variation of the impedance through detecting the pixel electrode model.
3. method according to claim 2 is characterized in that, the variation of the W/l of pixel electrode model is confirmed in the said 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 signal output port output variable quantity, as the variable quantity of the W/l of pixel electrode model with respect to the fiduciary level signal;
Wherein, signal input port connects the end that cabling connects the pixel electrode model through input, and the other end of pixel electrode model connects cabling through output and connects signal output port.
4. method according to claim 3 is characterized in that, said pixel electrode model is arranged on the array base palte of LCD LCD in advance; Said signal input port and signal output port are arranged on the signal substrate in advance.
5. method according to claim 4 is characterized in that, said variation according to W/l, and adjustment Gamma curve comprises:
When the variable quantity of W/l during greater than the threshold value that is provided with in advance, adjustment Gamma curve.
6. gamma Gamma curve adjusting apparatus is characterized in that this device comprises:
The change-detection unit is used to detect the variation of ratio W/l of wide cut W and the spacing l of the pixel electrode model of processing simultaneously with pixel electrode, and 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, adjustment Gamma curve.
7. device according to claim 6 is characterized in that, said change-detection unit, and the variation of the W/l of pixel electrode model is confirmed in the variation of the impedance through detecting the pixel electrode model.
8. device according to claim 7 is characterized in that, said change-detection unit comprises: signal input unit, detecting signal unit, pixel electrode model, signal input port, signal output port, input connect cabling and are connected cabling with output;
Wherein, signal input port connects the end that cabling connects the pixel electrode model through input, and the other end of pixel electrode model connects cabling through 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 signal output port output variable quantity,, and export to adjustment unit as the variable quantity of the W/l of pixel electrode model with respect to the fiduciary level signal.
9. device according to claim 8 is characterized in that, said pixel electrode model is arranged on the array base palte of LCD LCD in advance; Said signal input port and signal output port are arranged on the signal substrate in advance.
10. device according to claim 9 is characterized in that, said adjustment unit, and when the variable quantity of W/l during greater than the threshold value that is provided with in advance, adjustment Gamma curve.
11. a LCD is characterized in that, comprises the described gamma Gamma of the arbitrary claim of claim 6 to 10 curve adjusting apparatus.
12. LCD according to claim 11 is characterized in that, each LCD comprises a plurality of said gamma Gamma curve adjusting apparatus.
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| Application Number | Priority Date | Filing Date | Title |
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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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108597442A (en) * | 2018-04-13 | 2018-09-28 | 武汉精测电子集团股份有限公司 | The OLED module Gamma adjusting process and system of mathematical model are associated with based on multiple target |
| WO2019153410A1 (en) * | 2018-02-09 | 2019-08-15 | 深圳市华星光电半导体显示技术有限公司 | Method and system for automatic adjustment of gamma |
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| US20090284693A1 (en) * | 2007-08-03 | 2009-11-19 | Hitachi Displays, Ltd. | Liquid crystal display apparatus |
| 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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| CN1677181A (en) * | 2004-03-31 | 2005-10-05 | 夏普株式会社 | Liquid crystal display device, driving method therefor and electronic equipment |
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| WO2019153410A1 (en) * | 2018-02-09 | 2019-08-15 | 深圳市华星光电半导体显示技术有限公司 | Method and system for automatic adjustment of gamma |
| CN108597442A (en) * | 2018-04-13 | 2018-09-28 | 武汉精测电子集团股份有限公司 | The OLED module Gamma adjusting process and system of mathematical model are associated with based on multiple target |
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