CN108648707B - P-GAMMA automatic adjustment method and device based on medium and large size module - Google Patents
P-GAMMA automatic adjustment method and device based on medium and large size module Download PDFInfo
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- CN108648707B CN108648707B CN201810410592.2A CN201810410592A CN108648707B CN 108648707 B CN108648707 B CN 108648707B CN 201810410592 A CN201810410592 A CN 201810410592A CN 108648707 B CN108648707 B CN 108648707B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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Abstract
The invention discloses a method and a device for automatically adjusting P-GAMMA based on a middle-size module and a large-size module, wherein the method comprises the following steps: configuring a Flicker parameter and a P-Gamma adjusting parameter; configuring each binding point and a corresponding register address of the module; adjusting the VCOM register until a VCOM value corresponding to the minimum Flicker value is searched; sequentially carrying out Gamma adjustment on each binding point of the module, and in the Gamma adjustment process, adjusting a positive voltage value V + and a negative voltage value V-corresponding to the binding point on the premise of keeping the symmetry of positive and negative voltages, and circularly executing until the brightness value of the module is within the error range of the target brightness; read-back verification; and executing OTP burning. The device comprises a PC, an adjusting PG, a picture checking PG, an optical measuring instrument and a module. The invention has the passing rate of quantized gray-scale brightness, namely the passing rate of full 255 gray-scale brightness under the condition that the brightness accords with a Gamma2.2 curve and the error is +/-0.2. Experimental results show that the device has the characteristics of high adjusting speed and high brightness passing rate.
Description
Technical Field
The invention relates to the field of display and test of liquid crystal modules, in particular to a method and a device for automatically adjusting P-GAMMA based on a middle-size module and a large-size module.
Background
In the production process of the LVDS and VBYONE modules with medium and large sizes, a factory often needs to adjust Flicker, white balance and gamma curves of the modules so as to achieve the purposes of better color reduction and image quality improvement. Because there is the difference between the different modules, if all modules all use the same regulation data to produce Flicker, color cast easily, influence the picture quality.
Currently, the adjustment method adopted in the industry is as follows: (1) an engineer manually adjusts a group of experience data on a sample wafer module, and then the experience data are burnt into all the modules in the production process, and due to the actual difference of the screens, the phenomena of Flicker and color cast are easily generated on part of the screens in the adjusting method; (2) each screen is adjusted. However, manual adjustment is inefficient, and poor in accuracy and consistency, so an automatic adjustment method is usually adopted. The existing automatic adjustment mode usually only adjusts Flicker data for reasons of efficiency and accuracy, and Gamma still adopts fixed data. In this way, Flicker of the module can be well adjusted, and Gamma still causes image quality problems such as color cast and the like due to the fact that the Gamma uses fixed data and partial screens have actual difference.
Disclosure of Invention
In view of the deficiencies of the prior art, the invention aims to provide a middle and large size module-based P-Gamma automatic adjustment method and device for automatically adjusting LVDS, VBYONE modules Flicker and Gamma efficiently and stably.
In order to achieve the above object, the present invention provides a method for automatically adjusting P-GAMMA based on a middle-size module, which is characterized in that the method comprises the following steps:
1) configuring a Flicker parameter and a P-Gamma adjusting parameter;
2) configuring each binding point and a corresponding register address of the module;
3) analyzing the Flicker parameter, and adjusting the VCOM register until the VCOM value corresponding to the minimum Flicker value is searched;
4) analyzing P-Gamma adjustment parameters, and sequentially carrying out Gamma adjustment on each binding point of the module, wherein in the Gamma adjustment process, under the premise of keeping the symmetry of positive and negative pressure, the positive voltage value V + and the negative voltage value V-corresponding to the binding point are adjusted, and the steps are circularly executed until the brightness value of the module is within the error range of the target brightness;
5) whether the Flicker value of the read-back verification module is within the target Flicker error range or not is judged, if so, the step 6) is carried out, otherwise, fine adjustment is carried out according to the read-back result until the Flicker value and the brightness value of the module are within the target brightness error range;
6) and executing OTP burning, and solidifying the regulated VCOM register, the positive voltage value V + and the negative voltage value V-of each binding point into EEProm of the module IC.
Preferably, the module is a middle-sized or large-sized LVDS module or a VBYONE module.
Preferably, the method for adjusting the VCOM register in step 2) is a binary search algorithm.
Preferably, the Gamma adjustment in step 4) is performed by increasing or decreasing the positive voltage value V + and the negative voltage value V-at the same time by the same magnitude.
Preferably, the Gamma adjustment in step 4) is performed by increasing or decreasing the positive voltage value V + and the negative voltage value V-to one side by the same magnitude.
Preferably, the Gamma adjustment in step 4) is performed by increasing or decreasing the positive voltage value V + and the negative voltage value V-at the same time by the same magnitude in the first round of adjustment, and increasing or decreasing one of the positive voltage value V + and the negative voltage value V-at the same magnitude in the second round of fine adjustment.
Preferably, the brightness value of the module in the step 4) is within the target brightness error range, which means that the difference between the adjusted module brightness value and the gamma2.2 curve is within the error allowable range.
A device for realizing the P-GAMMA automatic adjustment method based on the middle-large size module is characterized by comprising a PC, an adjustment PG, a picture inspection PG, an optical measuring instrument and a module;
the PC: the system comprises a correcting PG, an optical measuring instrument, a VCOM register, a positive voltage value V + and a negative voltage value V-, and a picture checking PG, wherein the VCOM register, the positive voltage value V + and the negative voltage value V-are used for sending a Flicker parameter and a P-Gamma adjusting parameter to the correcting PG, controlling the picture checking PG to transmit gray scale picture information to a module, controlling the optical measuring instrument to acquire the brightness value of the module, controlling the VCOM register of the correcting PG adjusting module, the positive voltage value V + and the negative voltage value V-according to the Flicker parameter and;
the adjusting PG comprises the following steps: the device is used for configuring Flicker parameters, P-Gamma adjusting parameters, and positive voltage value V + and negative voltage value V-of the adjusting module (5) and executing OTP burning;
the picture inspection PG: the module is used for transmitting gray scale picture information to the module;
the optical measuring instrument is characterized in that: the brightness value used for acquiring the module is sent to the PC;
the module is as follows: and the display module is used for displaying the gray-scale picture information according to the VCOM register, the positive voltage value V + and the negative voltage value V-.
Further, the PC transmits the calibration result to a PC CIM system.
Furthermore, the module is a middle-large sized LVDS module or a VBYONE module, the adjusting PG and the picture checking PG are respectively connected with a PC (1) through a TPC/TP interface, and the PC is connected with the optical measuring instrument through an RS232 interface.
The invention has the beneficial effects that:
(1) the invention has the passing rate of quantized gray-scale brightness, namely the passing rate of full 255 gray-scale brightness under the condition that the brightness accords with a Gamma2.2 curve and the error is +/-0.2. Experimental results show that the device has the characteristics of high adjusting speed and high brightness passing rate.
(2) The invention has short adjusting time, the picture checking PG and the module are in a one-to-one mode, and the time for completing the adjustment (7 pairs of gray scales defined by Gamma positive and negative pressure are units) is obviously longer than the adjusting time of the traditional method.
(3) The invention adopts platform software, keeps the maximum flexibility, has all configurable correction coefficients and all configurable IC parameters; the maximum portability is kept, and all main stream PG equipment is compatible; the maximum openness is kept, the support of the new IC faces to users, and only scripts and configuration files need to be upgraded.
(4) The invention has simple operation, high Flicker and brightness passing rate and high test efficiency, and is convenient for large-scale use in factories.
Drawings
Fig. 1 is a block diagram of an automatic testing device for LVDS video signals according to the present invention.
In the figure: PC1, calibration PG2, picture inspection PG3, optical measurement instrument 4, module 5 and PC CIM system 6.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
The invention provides a P-GAMMA automatic adjustment method based on a medium-size module and a large-size module, which comprises the following steps of firstly adjusting Flicker, then adjusting GAMMA and finally adjusting Flicker again in the aspect of adjusting process, as shown in figure 1:
1) carrying out conventional configuration, calibration and basic function test on an optical tester, and configuring a Flicker parameter and a P-Gamma adjusting parameter;
2) configuring each binding point and a corresponding register address of the module according to the module IC operation manual;
3) analyzing the Flicker parameter, and adjusting the Flicker by adjusting a Vcom register by using a binary search algorithm until a VCOM value corresponding to the minimum Flicker value is searched;
4) analyzing the P-Gamma adjustment parameter, sequentially carrying out Gamma adjustment on each binding point of the module, and in the Gamma adjustment process, adjusting the positive voltage value V + and the negative voltage value V-corresponding to the binding point on the premise of keeping the symmetry of positive and negative voltages, and circularly executing until the brightness value of the module is within the error range of the target brightness.
The Gamma adjustment method can adopt the same addition and subtraction adjustment method, namely, the positive voltage value V + and the negative voltage value V-are simultaneously increased by (+3, +3) or simultaneously decreased by (-10 ) with the same magnitude. The Gamma adjustment method may also be a reverse addition or subtraction adjustment method, i.e., the positive voltage value V + and the negative voltage value V-are increased by the same magnitude and decreased by (+3, -3) or decreased by (-10, + 10).
5) After all binding points are adjusted, whether the Flicker value of the read-back verification module is within the target Flicker error range or not is judged, if yes, the step 6 is carried out, otherwise, fine adjustment is carried out according to the read-back result until the Flicker value and the brightness value of the module are within the target brightness error range; when the brightness value is trimmed, the positive voltage value V + and the negative voltage value V-are increased by the same magnitude, and decreased by one, or decreased by one.
6) And executing OTP burning, and solidifying the regulated VCOM register, the positive voltage value V + and the negative voltage value V-of each binding point into EEProm of the module IC.
Based on the above method, the results of the conditioning test of the present invention are shown in table 1, and the specific conditioning data are shown in table 2.
TABLE 1 Conditioning test results
| Module ID | Flicker Time(S) | Gamma Time(S) | Total Time(S) |
| 1 | 4.6 | 12.1 | 16.7 |
| 2 | 5.1 | 11.3 | 16.4 |
| 3 | 4.7 | 12.8 | 17.5 |
| 4 | 5.2 | 13.6 | 18.8 |
| 5 | 3.9 | 15.1 | 19 |
TABLE 2 adjustment data
In the aspect of software characteristics, the method relies on platform software to keep the maximum flexibility, all correction coefficients can be configured, and all IC parameters can be configured; the maximum portability is kept, and all main stream PG equipment is compatible; the maximum openness is kept, the support of the new IC faces to users, and only scripts and configuration files need to be upgraded.
In the aspect of system architecture, the invention adopts the existing PC + PG + optical instrument probe networking mode of the company.
The device of the P-GAMMA automatic adjustment method based on the middle-large-size module comprises a PC1, an adjustment PG2, a picture inspection PG3, an optical measuring instrument 4 and a module 5;
PC 1: the adjusting module is used for sending Flicker parameters and P-Gamma adjusting parameters to the adjusting PG2, controlling the picture checking PG3 to transmit gray scale picture information to the module 5, controlling the optical measuring instrument 4 to acquire the brightness value of the module 5, controlling the VCOM register, the positive voltage value V + and the negative voltage value V-of the adjusting PG2 adjusting module 5 according to the Flicker parameters and the P-Gamma adjusting parameters, and controlling the picture checking PG3 to execute OTP burning after the adjustment is finished. After the calibration is completed, the PC1 transmits the calibration result to the PC CIM system 6.
Adjusting PG 2: the system is used for configuring Flicker parameters, P-Gamma adjusting parameters, and positive voltage value V + and negative voltage value V-of the adjusting module 5, and executing OTP burning;
picture inspection PG 3: used for transmitting the gray scale picture information to the module 5;
the optical measuring instrument 4: the brightness value used for acquiring the module 5 is sent to the PC 1;
and (5) module: and the display module is used for displaying the gray-scale picture information according to the VCOM register, the positive voltage value V + and the negative voltage value V-.
The module 5 is a middle-large sized LVDS module or VBYONE module, the tuning PG2 and the visual inspection PG3 are respectively connected to the PC1 through a TPC/TP interface, and the PC1 is connected to the optical measurement instrument 4 through an RS232 interface.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be devised by those skilled in the art without departing from the principles of the invention and these modifications should also be considered as within the scope of the invention.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (8)
1. A P-GAMMA automatic adjustment method based on middle and large size module is characterized in that: the method comprises the following steps:
1) configuring a Flicker parameter and a P-Gamma adjusting parameter;
2) configuring each binding point and a corresponding register address of the module;
3) analyzing the Flicker parameter, and adjusting the VCOM register until the VCOM value corresponding to the minimum Flicker value is searched;
4) analyzing P-Gamma adjustment parameters, and sequentially carrying out Gamma adjustment on each binding point of the module, wherein in the Gamma adjustment process, under the premise of keeping the symmetry of positive and negative pressure, the positive voltage value V + and the negative voltage value V-corresponding to the binding point are adjusted, and the steps are circularly executed until the brightness value of the module is within the error range of the target brightness; the Gamma adjustment method is that the positive voltage value V + and the negative voltage value V-are increased or decreased simultaneously with the same size;
5) whether the Flicker value of the read-back verification module is within the target Flicker error range or not is judged, if so, the step 6) is carried out, otherwise, fine adjustment is carried out according to the read-back result until the Flicker value and the brightness value of the module are within the target brightness error range; when the brightness value is finely adjusted, the positive voltage value V + and the negative voltage value V-are increased by the same magnitude, and one is decreased, or one is decreased and one is increased;
6) and executing OTP burning, and solidifying the regulated VCOM register, the positive voltage value V + and the negative voltage value V-of each binding point into EEProm of the module IC.
2. The method of claim 1, wherein the method comprises the steps of: the module is a middle-large sized LVDS module or a VBYONE module.
3. The automatic P-GAMMA calibration method based on middle and large size module as claimed in claim 1 or 2, wherein: the method for adjusting the VCOM register in step 2) is a binary search algorithm.
4. The automatic P-GAMMA calibration method based on middle and large size module as claimed in claim 1 or 2, wherein: the Gamma adjustment method in the step 4) is that the positive voltage value V + and the negative voltage value V-are increased or decreased simultaneously with the same size during the first round of adjustment, and the positive voltage value V + and the negative voltage value V-are increased or decreased one by one with the same size during the second round of fine adjustment.
5. The method of claim 2, wherein the method comprises the steps of: the brightness value of the module in the step 4) is within the error range of the target brightness, which means that the difference value between the adjusted brightness value of the module and the Gamma2.2 curve is within the error allowable range.
6. An apparatus for implementing the method of claim 1, wherein the method comprises: comprises a PC (1), an adjusting PG (2), a picture checking PG (3), an optical measuring instrument (4) and a module (5);
the PC (1): the device is used for sending Flicker parameters and P-Gamma adjusting parameters to the adjusting PG (2), controlling the picture checking PG (3) to transmit gray-scale picture information to the module (5), controlling the optical measuring instrument (4) to acquire the brightness value of the module (5), controlling the VCOM register, the positive voltage value V + and the negative voltage value V-of the adjusting module (5) of the adjusting PG (2) according to the Flicker parameters and the P-Gamma adjusting parameters, and controlling the picture checking PG (3) to execute OTP burning after the adjustment is finished;
the tuning PG (2): the device is used for configuring Flicker parameters, P-Gamma adjusting parameters, and positive voltage value V + and negative voltage value V-of the adjusting module (5) and executing OTP burning;
the picture inspection PG (3): the module is used for transmitting gray scale picture information to the module (5);
the optical measuring instrument (4): the brightness value used for acquiring the module (5) is sent to the PC (1);
the module (5): and the display module is used for displaying the gray-scale picture information according to the VCOM register, the positive voltage value V + and the negative voltage value V-.
7. The apparatus for automatically adjusting P-GAMMA based on middle and large size module according to claim 6, wherein: the PC (1) transmits the calibration result to a PC CIM system (6).
8. The apparatus for automatically adjusting P-GAMMA based on middle and large size module according to claim 7, wherein: the module (5) is a middle-large size LVDS module or a VBYONE module, the adjusting PG (2) and the picture checking PG (3) are respectively connected with the PC (1) through a TPC/TP interface, and the PC (1) is connected with the optical measuring instrument (4) through an RS232 interface.
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| CN109036327A (en) * | 2018-10-24 | 2018-12-18 | 惠科股份有限公司 | Gamma value adjusting method and device of display panel and computer readable storage medium |
| CN109616070A (en) * | 2019-01-15 | 2019-04-12 | 成都中电熊猫显示科技有限公司 | Brightness adjusting method, liquid crystal display panel and the liquid crystal display of liquid crystal display panel |
| CN109712584B (en) * | 2019-02-14 | 2021-01-01 | 惠州市华星光电技术有限公司 | Debugging method of liquid crystal display device |
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| CN105702215B (en) * | 2016-04-26 | 2018-05-25 | 京东方科技集团股份有限公司 | Gamma electric voltage bearing calibration and device |
| CN106875916B (en) * | 2017-04-27 | 2019-03-26 | 武汉华星光电技术有限公司 | The method for burn-recording and burning/recording liquid crystal display panel device of liquid crystal display panel |
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