CN108428430B - Multipath gamma adjusting method and device - Google Patents
Multipath gamma adjusting method and device Download PDFInfo
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- CN108428430B CN108428430B CN201810189376.XA CN201810189376A CN108428430B CN 108428430 B CN108428430 B CN 108428430B CN 201810189376 A CN201810189376 A CN 201810189376A CN 108428430 B CN108428430 B CN 108428430B
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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- Transforming Electric Information Into Light Information (AREA)
- Processing Of Color Television Signals (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention relates to a multipath gamma adjusting method and a multipath gamma adjusting device, in particular to a method for independently outputting a corresponding drawing command for each OLED module to be adjusted to enable the module to present W0-255 pictures corresponding to gamma binding points; and each OLED module to be adjusted shares gamma adjusting parameters configured by an upper software interface, wherein the gamma adjusting parameters comprise the brightness of each binding point, the adjustment of color coordinates and the check error range, and parameter information of the OLED module to be adjusted is independently collected, a corresponding gamma register value is obtained, and then an output instruction is compiled by a script and is sent to the corresponding OLED module to be adjusted to enable the corresponding OLED module to be adjusted to present a picture written with the gamma register value. The invention can improve the efficiency of the gamma adjusting system, leads the operation to be more flexible, is more convenient for production line operation, does not influence the realization of the adjustment of a multi-path system in the real sense among the mutual channels, and further improves the operation capacity of the production line.
Description
Technical Field
The present invention relates to gamma adjusting methods and devices, and more particularly, to a multi-channel gamma adjusting method and device.
Background
An OLED (Organic Light-Emitting Diode) is also called an Organic electroluminescent display or an Organic Light-Emitting semiconductor. It was found in the laboratory in 1979 by professor deng dunqing cloud of chinese ethnic origin (china w.tang). The OLED display technology has the advantages of self-luminescence, wide viewing angle, almost infinite contrast, low power consumption, extremely high reaction speed and the like. However, the price of the high-end display screen is more expensive than that of the liquid crystal television.
At present, the manufacturing process technology of the OLED is still in a continuous development stage, and various large panel manufacturers are in experimental verification and line testing. Due to the fact that the manufacturing technology is not mature enough, the produced modules are different, the difference can directly cause the difference of initial gamma conditions of some modules in a batch of modules, and therefore the debugging efficiency and effect of gamma are affected.
At present, a single-thread multi-channel simultaneous adjustment mode is adopted in an OLED gamma adjustment multi-channel system, when the test method meets modules with inconsistent module manufacturability, the adjustment efficiency is low, the operation is not flexible enough, because a plurality of modules can only be simultaneously loaded/unloaded, when some modules are in problem, the gamma adjustment time is long, and other modules are quick to adjust, and the time waste is caused by waiting for unloading. The operation is not flexible enough, the adjustment of the single-chip module can not be stopped in case of emergency, and another module can not be accessed again to start the adjustment of the single-chip module.
Disclosure of Invention
The technical problem of the invention is mainly solved by the following technical scheme:
a multi-way gamma adjustment method is characterized by comprising the following steps:
for each OLED module to be regulated, independently outputting a corresponding drawing instruction to enable the module to present W0-255 pictures corresponding to gamma binding points;
and for each OLED module to be adjusted, gamma adjustment parameters configured by an upper-layer software interface are shared, the gamma adjustment parameters comprise the brightness of each binding point, the adjustment of color coordinates and a check error range, parameter information of the OLED module to be adjusted is independently acquired, a corresponding gamma register value is obtained, and then an output instruction is compiled by a script and is sent to the corresponding OLED module to be adjusted to present a picture written with the gamma register value. The adjusted module color coordinates and brightness will vary with the size of the written register values.
In the above-mentioned multi-way gamma adjustment method, the independent patterning command is realized by allocating corresponding independent IPs in the lan to the corresponding OLED module to be adjusted.
In the multi-channel gamma adjustment method, after the corresponding drawing command is output, binding point-level picture pictures are sequentially output to the OLED module to be adjusted according to the received drawing command.
In the above method for adjusting multiple gamma, collecting parameter information of an OLED module is collected according to a received collection packet, and collecting data includes: and adjusting the brightness and the x and y color coordinates of the OLED module to be adjusted, and then performing gamma adjustment by adopting the existing adjusting algorithm.
In the above multi-way gamma adjustment method, the specific process of script compiling is to execute a 0x39 write command and a 0x06 read-back command through an MIPI protocol D0 channel according to the received optimized gamma register value, and transmit the commands to the OLED module to be adjusted.
In the foregoing method for multi-way gamma adjustment, the method further includes: and after the adjusted OLED module presents the picture written with the optimized gamma register value, the OLED module parameter information is adjusted by check again, so that the brightness and the color coordinate of the adjusted module meet the error range of check action. The purpose of the re-acquisition is to prevent the partial module from having the attenuation of brightness or color coordinates after the adjustment, so that the gamma adjustment result is invalid. Similar to a re-confirmation action, ensures that the whole process is error-free.
In the above multipath gamma adjustment method, the gamma register value is an optimized gamma register value obtained based on VESA algorithm according to the collected OLED module parameter information, and the VESA algorithm is based on the following formula:
wherein, ln: the nth order brightness; l 255: brightness of 255 th order; l0 luminance 0 th order; γ: a variable one; const: a variable two;
the specific process of obtaining the optimized gamma register value is as follows: firstly, the measurement of brightness is taken, the operation makes the deviation of high brightness reduced, the deviation of measured value and fitting straight line of low brightness amplified, and is matched with the sensitivity of human eye under high and low brightness.
In the foregoing method for adjusting multiple gamma registers, obtaining the optimized gamma register value includes:
collecting 5 groups of adjusted gamma register values;
secondly, calculating const and gamma based on the steps of script compiling, and averaging under multiple groups;
and finally, according to different modules and levels made by customers, configuring n with an error range for the mean value, taking const and gamma as effective values in the range, and discarding the out-of-range values.
In the multi-channel gamma adjusting method, after each adjusting process is completed, the adjusted effect meets the configured parameter range, and the register value after adjustment is calculated through the VESA algorithm, and then the optimized value is obtained and stored, and is used as the basic value for adjusting the next OLED module to be adjusted.
In addition, the modules which are adjusted and check adjusted are subjected to independent OTP burning of the corresponding channels, and channel numbers are marked to be used as the independent distinguishing modules.
A multi-channel gamma adjusting device is characterized by comprising a processor, a plurality of PG programming devices, a plurality of script resolvers and an optical device controller, wherein the PG programming devices are connected with an OLED module to be adjusted through the corresponding script resolvers, the optical device controller is respectively connected with the processor and the OLED module to be adjusted, and the processor stores a computer program and can achieve the method steps.
Therefore, the invention has the following advantages: the invention can improve the efficiency of the gamma adjusting system, leads the operation to be more flexible and more convenient for production line operation, does not influence the realization of the adjustment of a multi-path system in the real sense among the mutual channels, and further improves the production line operation capacity by integrating the factors.
Drawings
FIG. 1 is a schematic diagram of a hardware connection structure according to the present invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b):
1. and (4) software configuration. Reasonable gamma parameters such as LV, gamma index and x \ y color scale are preset on an upper layer interface, and different channels RGB drawing is selected in a key mode, wherein the option is to enable independent adjustment and burning among multiple threads. For example, the figure is a software configuration interface, and the single-thread independent running is mainly realized by software codes.
2. And (4) communication configuration. Hardware IP address allocation is respectively carried out on the fixed dialing codes of the 5 PGs, a local area network is built by using a router, and upper-layer software is connected with the PGs through a network port communication protocol. And the software establishes the corresponding relationship between the probe and the module of the CA 310. The corresponding relation can be freely matched with the upper layer, so that the damage of the individual PG or CA310 can be avoided, and the use can not be caused.
3. The adjustment is started. The PG receives the drawing command and sequentially outputs binding step picture pictures, such as W255-W0 steps. The upper layer issues an initial gamma register value (the register value algorithm is a reasonable value calculated through the vesa algorithm, the value is stored by the upper layer), the upper layer synchronously issues a CA310 acquisition packet, the CA310 acquisition packet is interacted with the CA310 through an R232 serial port protocol, and the CA310 respectively acquires corresponding module brightness (LV) and x and y color coordinates and transmits the brightness (LV) and the x and y color coordinates back to the upper layer. The upper layer packs the acquired data and sends the data to an algorithm, and the algorithm calculates a reasonable gamma register value and then sends the gamma register value to a script. The script executes a 0x39 write-in instruction and a 0x06 read-back instruction through an MIPI protocol D0 channel, the module shows the effect after the gamma register value is written in, the upper layer collects the brightness of the module through the R232 serial port again until the whole adjusting process is adjusted, and the adjusted effect meets the configured parameter range. And after the register value after adjustment is calculated through the VESA algorithm, the most reasonable value is taken out and returned to the upper layer for storage, and the most reasonable value is used as a basic value for next adjustment. The whole process is continuously circulated. In the process, after the adjustment of a certain side point of any channel fails, the adjustment is not required to be carried out again after all 5 modules are adjusted, and the adjustment can be directly carried out on a certain channel or the adjustment is carried out again after the modules are replaced. The time gap can be fully utilized to improve the efficiency.
And performing linear fitting on the brightness value by the VESA method, wherein the coefficient of the first term obtained by fitting is the gamma value. This method first takes a number of measurements of the brightness and operates on the resulting value. This method first takes a number of measurements of the brightness and operates on the resulting value. The method firstly takes the number of the brightness measurement, the operation is carried out to reduce the deviation in high brightness, the deviation of the measured value and the fitting straight line in low brightness is amplified, the deviation is amplified with the human eye, and the sensitivity of the human eye in high and low brightness is consistent. In addition, the VESA algorithm uses a least square method, the least square method used for obtaining the fitted straight line can be obtained by the method, various coefficients of the fitted straight line can be obtained by the method, and a correlation coefficient r of data and the straight line can be obtained, when the correlation coefficient is closer to 1, the deviation degree of the data points and the fitted straight line is smaller, and conversely, the deviation degree is larger, and vice versa, the data points and the fitted straight line are larger. However, in this method, far-in but in this method, the salient points far from the center have a large influence on the final calculation result. Simultaneously adjusting the parameters generated after 5 groups are finished, calculating const and gamma through a second-order equation, and solving under multiple groups
Const and gamma calculated because of the module making irregularities-Must be on averageIs discarded as a base number, and is not processed. VGS [8:0 ] according to IC characteristics]And VGS [ V ]]There is a linear relationship, and VGS [8:0 ]]Has a linear relationship with lv (x, y), for the same reason VGS [8:0 ]]There is a linear relationship with lv (x, y). And the reverse reasoning is substituted into the register value of 255 and 0 to obtain the register value of ln, and the register value is used as the initial value of the next adjustment, and the more accurate the initial value is, the faster the adjustment is. By increasing the speed of adjustment.
5. And (4) OTP burning, namely writing the adjusted register value into the module EEPROM in the step 4. The execution of the burning action is mainly completed by a script, wherein the script distinguishes each PG through chanl, and the burning process is respectively executed on 10 PGs by adopting an MIPI d0 channel: open MTP voltage- "gamma EN-" check gamma flag- "write completion.
6. And recording an adjustment result, and respectively recording a gamma adjustment register value, an adjustment initial value and corresponding information of LV, X and Y of the help point adjustment after the adjustment is finished.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (9)
1. A multi-way gamma adjustment method is characterized by comprising the following steps:
for each OLED module to be regulated, independently outputting a corresponding drawing instruction to enable the module to present W0-255 pictures corresponding to gamma binding points;
for each OLED module to be adjusted, sharing gamma adjusting parameters configured by an upper-layer software interface, wherein the gamma adjusting parameters comprise the brightness of each binding point, the adjustment of color coordinates and the check error range, independently acquiring the parameter information of the OLED module to be adjusted, obtaining the corresponding gamma register value, compiling an output instruction to the corresponding OLED module to be adjusted through a script, and enabling the corresponding OLED module to present a picture written with the gamma register value;
and the gamma register value is an optimized gamma register value obtained according to the collected OLED module parameter information and based on a VESA algorithm, and the VESA algorithm is based on the following formula:
wherein, In: the nth order brightness; i255: brightness of 255 th order; i0: 0-order brightness; γ: a variable one; const: a variable two;
the specific process of obtaining the optimized gamma register value is as follows: firstly, the measurement of brightness is taken, the operation makes the deviation of high brightness reduced, the deviation of measured value and fitting straight line of low brightness amplified, and is matched with the sensitivity of human eye under high and low brightness.
2. The method of claim 1, wherein the independent mapping commands are implemented by assigning corresponding independent IPs in the lan to the corresponding OLED modules to be adjusted.
3. The method according to claim 1, wherein after outputting the corresponding mapping command, sequentially outputting the binding-point-level picture pictures to the OLED module to be adjusted according to the received mapping command.
4. The multi-channel gamma adjustment method of claim 1, wherein collecting OLED module parameter information is collected according to a received collection packet, and collecting data comprises: and adjusting the brightness and the x and y color coordinates of the OLED module to be adjusted, and then performing gamma adjustment by adopting the existing adjusting algorithm.
5. The method of claim 1, wherein the script is compiled by executing a 0x39 write command and a 0x06 read-back command according to the optimized gamma register value received via the MIPI D0 channel, and transmitting the commands to the OLED module to be regulated.
6. The method of claim 1, further comprising: and after the adjusted OLED module presents the picture written with the optimized gamma register value, the OLED module parameter information is adjusted by check again, so that the brightness and the color coordinate of the adjusted module meet the error range of check action.
7. The method of claim 6, wherein obtaining the optimized gamma register value comprises:
collecting 5 groups of adjusted gamma register values;
secondly, calculating const and gamma based on the steps of script compiling, and averaging under multiple groups;
and finally, configuring error ranges for the mean value according to different modules and the level of customer manufacture, taking n, const and gamma as effective values in the ranges, and discarding the out-of-range values.
8. The method of claim 1, wherein after each adjustment process is completed, the adjusted effect satisfies the configured parameter range, and the register value after adjustment is calculated by the VESA algorithm, and the optimized value is obtained and stored as the basic value for adjustment of the next OLED module to be adjusted.
9. A multi-way gamma adjusting device, comprising a processor, a plurality of PG programming devices, a plurality of script resolvers, and an optical device controller, wherein the PG programming devices are connected to an OLED module to be adjusted through the corresponding script resolvers, the optical device controller is respectively connected to the processor and the OLED module to be adjusted, and the processor stores a computer program, so that the method steps of any one of claims 1 to 8 can be implemented.
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| CN110517634B (en) * | 2019-08-28 | 2021-01-22 | 霸州市云谷电子科技有限公司 | Gamma debugging method, gamma debugging system and display device |
| CN110837352B (en) * | 2019-11-06 | 2023-12-05 | 晟合微电子(肇庆)有限公司 | Register setting system of OLED driver IC |
| CN112086064B (en) * | 2020-09-22 | 2022-04-26 | 禹创半导体(深圳)有限公司 | Method for applying MIPI instruction comparison mechanism to backlight adjustment |
| CN114203090A (en) * | 2021-12-16 | 2022-03-18 | 霸州市云谷电子科技有限公司 | Gamma debugging method, device and storage medium |
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| CN104008736B (en) * | 2013-02-26 | 2017-07-07 | 合肥京东方光电科技有限公司 | Automatically adjust device, the optics debugging apparatus of liquid crystal display gamma curve |
| CN103680438B (en) * | 2013-11-22 | 2015-12-02 | 武汉精立电子技术有限公司 | The gamma curve of LCD screen and the synchronous antidote of Flicker phenomenon |
| CN103713407B (en) * | 2013-12-20 | 2016-08-17 | 武汉精立电子技术有限公司 | LCD screen color analysis instrument |
| CN105262973B (en) * | 2015-09-11 | 2018-06-19 | 武汉精测电子集团股份有限公司 | The device and method of parallel multi-channel MIPI module points screen adjusting is realized based on FPGA |
| CN105096896B (en) * | 2015-09-18 | 2017-11-21 | 京东方科技集团股份有限公司 | Gamma electric voltage adjusting method and device |
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| CN106328070B (en) * | 2016-09-28 | 2018-12-28 | 武汉精测电子集团股份有限公司 | OLED mould group Gamma adjusting process and device |
| CN106373527B (en) * | 2016-11-11 | 2018-09-07 | 武汉精测电子集团股份有限公司 | The gamma and colour temperature Automatic adjustment method of a kind of highest and minimum gray scale |
| CN106531065B (en) * | 2016-11-11 | 2019-05-10 | 武汉精测电子集团股份有限公司 | A kind of parallel regulating system of one-to-many gamma curve and method |
| CN107516482B (en) * | 2017-08-29 | 2020-11-13 | 苏州佳智彩光电科技有限公司 | ARM-based OLED screen detection compensation method |
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