CN111653227A - VCOM voltage burning method and device for liquid crystal display module - Google Patents
VCOM voltage burning method and device for liquid crystal display module Download PDFInfo
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- CN111653227A CN111653227A CN202010645473.2A CN202010645473A CN111653227A CN 111653227 A CN111653227 A CN 111653227A CN 202010645473 A CN202010645473 A CN 202010645473A CN 111653227 A CN111653227 A CN 111653227A
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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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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- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a VCOM voltage burning method of a liquid crystal display module, which comprises the steps of firstly adjusting the liquid crystal display module to display a black picture in a starting state, and then controlling the liquid crystal display module to restart and display the black picture; when the screen of the liquid crystal display module displays stably, controlling the liquid crystal display module to display a Flicker picture, continuously writing different VCOM voltage values, and obtaining an optimal VCOM voltage value by comparing the Flicker values; and after the liquid crystal display module is controlled to be restarted, the optimal VCOM voltage value is burnt into the liquid crystal display module. The VCOM voltage burning method for the liquid crystal display module, provided by the invention, realizes automatic detection and automatic burning of the optimal VCOM voltage value, can reduce the production time and improve the production efficiency.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a VCOM voltage burning method and device for a liquid crystal display module.
Background
In the production of the liquid crystal display module, due to the characteristic difference of the liquid crystal panels, the best VCOM voltage (reference voltage for liquid crystal molecule deflection) needs to be searched in the range of the VCOM voltage of the liquid crystal display module to realize the minimum Flicker feeling of human eyes of Flicker (flash frequency) value, and the existing VCOM voltage burning method has the advantages of long time consumption, low efficiency, high cost, difficulty in meeting the generation requirement and inconvenient operation.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a VCOM voltage burning method and device for a liquid crystal display module.
The invention provides a VCOM voltage burning method of a liquid crystal display module, which comprises the following steps:
s1, firstly, adjusting the liquid crystal display module to display a black picture in a power-on state, and then controlling the liquid crystal display module to restart and display the black picture;
s2, when the screen of the liquid crystal display module displays stably, controlling the liquid crystal display module to display a Flicker picture, continuously writing different VCOM voltage values, and obtaining an optimal VCOM voltage value by comparing the Flicker values;
and S3, controlling the liquid crystal display module to restart, and then burning the optimal VCOM voltage value into the liquid crystal display module.
Preferably, the method further comprises step S4: after the liquid crystal display screen is restarted, reading the current VCOM and comparing the current VCOM with the optimal VCOM voltage value, if the current VCOM voltage value and the optimal VCOM voltage value are consistent, the burning is successful; if the two do not coincide, the process returns to step S2.
Preferably, the method further comprises step S5: and if the burning is successful in the step S4, controlling the liquid crystal display module to switch to a Flicker picture, re-detecting whether the Flicker value reaches a set value, and judging the quality of the finished liquid crystal display module according to the detection result.
Preferably, in step S2, after obtaining the optimal VCOM voltage value, determining whether the corresponding Flicker value reaches a set value, if so, performing step S3; otherwise, reporting an error.
Preferably, in step S2, after the liquid crystal display module displays the black frame for N seconds, the liquid crystal display module is controlled to display a Flicker frame; n ≧ 1 s.
A VCOM voltage burning device for a liquid crystal display module comprises: controlling the test box and the scintillation test probe;
the control test box is used for connecting the liquid crystal display module and reading parameters of the liquid crystal display module;
the control test box is used for controlling the liquid crystal display module to be turned on and off and switching display pictures under the state that the liquid crystal display module is connected with the control test box;
the Flicker test probe is used for detecting the backlight lamp state and Flicker value of the liquid crystal display module;
the flicker test probe is connected with the control test box, and the control test box is used for controlling the liquid crystal display module to work according to the test result of the flicker test probe.
Preferably, the control test box is used for acquiring the on-off information of the liquid crystal display module according to the backlight lamp state of the liquid crystal display module detected by the flicker test probe; and when the liquid crystal display module displays a Flicker picture, the Flicker value is obtained according to the detection result of the Flicker test probe.
Preferably, the parameters of the liquid crystal display module include resolution and screen size.
The VCOM voltage burning method for the liquid crystal display module, provided by the invention, realizes automatic detection and automatic burning of the optimal VCOM voltage value, can reduce the production time and improve the production efficiency.
According to the VCOM voltage burning device for the liquid crystal display module, through combination of the control test box and the Flicker test probe, rapid search of VCOM voltage can be achieved, the optimal VCOM voltage with the lowest Flicker value, namely the optimal VCOM voltage when human eye Flicker is the weakest, is found, and the optimal VCOM voltage is burnt into the liquid crystal display module. Therefore, batch burning of the liquid crystal display module is realized through module integration, the production time is favorably shortened, the production efficiency is improved, and the production cost is reduced.
Drawings
FIG. 1 is a flowchart illustrating a VCOM voltage burning method for a liquid crystal display module according to the present invention;
fig. 2 is a block diagram of a device for programming a VCOM voltage of a liquid crystal display module according to the present invention.
Detailed Description
Referring to fig. 1, the method for programming the VCOM voltage of the liquid crystal display module provided by the invention comprises the following steps.
S1, adjusting the liquid crystal display module to display black image when the LCD module is turned on, and controlling the LCD module to be turned on again to display black image.
And S2, when the screen of the liquid crystal display module displays stably, controlling the liquid crystal display module to display a Flicker picture, continuously writing different VCOM voltage values, and obtaining the optimal VCOM voltage value by comparing the Flicker value. Specifically, in this step, the optimal VCOM voltage value is the VCOM voltage value when the Flicker value is the lowest, that is, the human eye Flicker is the weakest.
In this step, the preset time value is waited for after the liquid crystal display module is started, so that the screen display stability of the liquid crystal display module is ensured. Specifically, in step S2, after the liquid crystal display module displays the black frame for N seconds, the liquid crystal display module is controlled to display the Flicker frame; n ≧ 1 s. And S3, controlling the liquid crystal display module to restart, and then burning the optimal VCOM voltage value into the liquid crystal display module. Thus, in the present embodiment, automatic detection and automatic programming of the optimal VCOM voltage value are realized.
In specific implementation, after the optimal VCOM voltage value is obtained in the previous step S2, whether the corresponding Flicker value reaches a set value is further determined, if yes, step S3 is performed; otherwise, reporting an error. Therefore, VCOM with wrong programming on the liquid crystal display module is avoided.
In specific implementation, in step S2 of this embodiment, in the process of controlling the liquid crystal display module to display the Flicker picture, the Flicker value is monitored in real time, and the VCOM voltage value corresponding to the minimum Flicker value is obtained as the alternative VCOM voltage value; then judging whether the Flicker value reaches a set value, if so, outputting the alternative VCOM voltage value as an optimal VCOM voltage value; otherwise, a smaller Flicker value is selected again. Thus, through cyclic detection, the finally obtained optimal VCOM voltage value can be ensured to be the VCOM value corresponding to the minimum Flicker value reaching the set value.
S4, after the liquid crystal display screen is restarted, reading the current VCOM and comparing the current VCOM with the optimal VCOM voltage value, if the current VCOM and the optimal VCOM voltage value are consistent, the burning is successful; if the two do not coincide, the process returns to step S2.
S5, if the burning is successful in the step S4, the liquid crystal display module is controlled to switch to a Flicker picture, whether the Flicker value reaches a set value is detected again, and the quality of the finished liquid crystal display module is judged according to the detection result. Specifically, if the Flicker value reaches a set value, the liquid crystal display module is qualified; and on the contrary, if the Flicker value does not reach the set value, the liquid crystal display module is unqualified.
In this embodiment, through steps S4 and S5, the VCOM and Flicker values are detected after the liquid crystal display module after being burned with VCOM is restarted, so that the burning result is verified, and the finally obtained product quality of the liquid crystal display module is ensured.
Referring to fig. 2, the invention further provides a device for programming VCOM voltage of a liquid crystal display module, comprising: controlling the test box and the scintillation test probe.
The control test box is used for connecting the liquid crystal display module and reading parameters of the liquid crystal display module. Specifically, the parameters of the liquid crystal display module include resolution, screen size and the like, so that pictures conforming to the liquid crystal display module can be selected for display testing.
And under the state that the liquid crystal display module is connected with the control test box, the control test box is used for controlling the liquid crystal display module to be turned on and off and switching display pictures. Specifically, in this embodiment, the liquid crystal display module can be turned on or off by controlling the power on/off of the interface of the liquid crystal display module.
The Flicker test probe is used for detecting the backlight lamp state and Flicker value of the liquid crystal display module.
The flicker test probe is connected with the control test box, and the control test box is used for controlling the liquid crystal display module to work according to the test result of the flicker test probe. Specifically, the control test box is used for acquiring the on-off information of the liquid crystal display module according to the backlight lamp state of the liquid crystal display module detected by the flicker test probe; and when the liquid crystal display module displays a Flicker picture, the Flicker value is obtained according to the detection result of the Flicker test probe.
The working method of the above device is further explained below.
When the device works, the method specifically comprises the following steps:
(1) and controlling the liquid crystal display module to display black pictures according to the resolution ratio of the liquid crystal display module and the screen size after the test box is controlled to be started.
(2) The flicker test probe is placed above the liquid crystal display module, and after the flicker test probe detects that the backlight of the liquid crystal display module is turned on, the flicker test probe enters a waiting state and displays 'please turn off' on a screen of the flicker test probe to indicate that the liquid crystal display module is currently in a turn-on state and prompt an operator for operation.
(3) And after a shutdown key on the control test box is pressed, the control test box executes shutdown operation of the liquid crystal display module. And the screen of the liquid crystal display module is closed to display, and the flicker test probe detects that the backlight of the liquid crystal display module is turned off and then displays 'please start up' on the screen to indicate that the liquid crystal display module is in a power-off state currently so as to prompt an operator for operation.
(4) And pressing a power-on key on the control test box to control the liquid crystal display black picture, and controlling the test box to read the VCOM initial design voltage of the liquid crystal display module after the flicker test probe detects the power-on. Specifically, the method comprises the steps of waiting for N seconds to enable the screen of the liquid crystal display module to display stably, prompting countdown on a screen of a Flicker test probe, signaling a control test box to switch a display picture of the liquid crystal display module to a Flicker picture when the countdown of the Flicker test probe is finished, continuously writing different VCOM voltage values, automatically judging whether the optimal VCOM voltage value is reached, judging whether the Flicker value corresponding to the optimal VCOM voltage value reaches a set qualified Flicker value, entering the next step if the optimal VCOM voltage value is qualified, and displaying 'unqualified' and reporting an error if the optimal VCOM voltage value is unqualified.
(5) The flicker test probe controls the test box to close and open the screen, the purpose of resetting the liquid crystal display module is achieved, and then the optimal VCOM voltage value is burnt into the liquid crystal display module.
(6) After the burning is finished, the Flicker test probe informs the control test box to close again and then opens the liquid crystal display module, the VCOM voltage value is read and compared with the optimal VCOM voltage value burnt before, if the VCOM voltage value is the same, the 'burning success' is prompted, otherwise, the 'burning failure' is prompted, if the VCOM voltage value is successful, the control test box controls the liquid crystal display module to be switched to a Flicker picture, whether the Flicker meets the set value requirement is redetected, if the VCOM voltage value meets the set value requirement, the 'pass' is prompted, and if the VCOM voltage value does not meet the set value,
(7) the liquid crystal display module can be directly replaced by pressing the power-off key on the control test box, and then the power-on key is pressed to skip the first step and directly enter the second step.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (8)
1. A VCOM voltage burning method for a liquid crystal display module is characterized by comprising the following steps:
s1, firstly, adjusting the liquid crystal display module to display a black picture in a power-on state, and then controlling the liquid crystal display module to restart and display the black picture;
s2, when the screen of the liquid crystal display module displays stably, controlling the liquid crystal display module to display a Flicker picture, continuously writing different VCOM voltage values, and obtaining an optimal VCOM voltage value by comparing the Flicker values;
and S3, controlling the liquid crystal display module to restart, and then burning the optimal VCOM voltage value into the liquid crystal display module.
2. The method for programming the VCOM voltage of the liquid crystal display module of claim 1, further comprising the step S4: after the liquid crystal display screen is restarted, reading the current VCOM and comparing the current VCOM with the optimal VCOM voltage value, if the current VCOM voltage value and the optimal VCOM voltage value are consistent, the burning is successful; if the two do not coincide, the process returns to step S2.
3. The method for programming the VCOM voltage of the liquid crystal display module of claim 2, further comprising the step S5: and if the burning is successful in the step S4, controlling the liquid crystal display module to switch to a Flicker picture, re-detecting whether the Flicker value reaches a set value, and judging the quality of the finished liquid crystal display module according to the detection result.
4. The method for burning VCOM voltage of a liquid crystal display module of claim 1, wherein in step S2, after obtaining the optimal VCOM voltage value, determining whether the corresponding Flicker value reaches a predetermined value, if yes, performing step S3; otherwise, reporting an error.
5. The method for burning VCOM voltage of a liquid crystal display module of claim 4, wherein in step S2, after the liquid crystal display module displays black images for N seconds, the liquid crystal display module is controlled to display Flicker images; n ≧ 1 s.
6. The utility model provides a liquid crystal display module VCOM voltage burns record device which characterized in that includes: controlling the test box and the scintillation test probe;
the control test box is used for connecting the liquid crystal display module and reading parameters of the liquid crystal display module;
the control test box is used for controlling the liquid crystal display module to be turned on and off and switching display pictures under the state that the liquid crystal display module is connected with the control test box;
the Flicker test probe is used for detecting the backlight lamp state and Flicker value of the liquid crystal display module;
the flicker test probe is connected with the control test box, and the control test box is used for controlling the liquid crystal display module to work according to the test result of the flicker test probe.
7. The VCOM voltage burning device of the LCD module as claimed in claim 6, wherein the control box is used for obtaining the on/off information of the LCD module according to the backlight state of the LCD module detected by the flicker test probe; and when the liquid crystal display module displays a Flicker picture, the Flicker value is obtained according to the detection result of the Flicker test probe.
8. The apparatus of claim 6, wherein the parameters of the LCD module include resolution and screen size.
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| CN202010645473.2A CN111653227A (en) | 2020-07-07 | 2020-07-07 | VCOM voltage burning method and device for liquid crystal display module |
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| CN202010645473.2A CN111653227A (en) | 2020-07-07 | 2020-07-07 | VCOM voltage burning method and device for liquid crystal display module |
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Cited By (1)
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| CN113626042A (en) * | 2021-07-16 | 2021-11-09 | 江西联创（万年）电子有限公司 | Method and device for burning Flicker on display screen, computer and readable storage medium |
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