CN114268754B - Writing method of Flicker debugging value of Tconless liquid crystal display television - Google Patents
Writing method of Flicker debugging value of Tconless liquid crystal display television Download PDFInfo
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- CN114268754B CN114268754B CN202111587161.1A CN202111587161A CN114268754B CN 114268754 B CN114268754 B CN 114268754B CN 202111587161 A CN202111587161 A CN 202111587161A CN 114268754 B CN114268754 B CN 114268754B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005192 partition Methods 0.000 claims abstract description 35
- 238000003860 storage Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Abstract
The invention relates to the field of liquid crystal televisions, and discloses a writing method of a Flicker debugging value of a Tconless liquid crystal television, which aims at a TCON driving IC without NVM, and the VCOM value after the Flicker is debugged on line can be written into the driving IC again. The method comprises the following steps: an address register is fixed by utilizing an unerased partition in the hardware of the television core and is used for storing a VCOM value generated after the complete machine Flicker is debugged to be qualified, and the VCOM value stored in the core is written into a TCON driving IC without NVM by utilizing the starting process of the complete machine. The invention solves the problem that the TCON driving IC without NVM can not store the production line Flicker debugging value, restores the on-line debugging result of the liquid crystal television product and improves the subjective effect of the liquid crystal television.
Description
Technical Field
The invention relates to the field of liquid crystal televisions, in particular to a writing method of a Flicker debugging value of a Tconless liquid crystal television.
Background
In the liquid crystal television industry, along with the popularization of the Tconless technology, more and more liquid crystal screen factories put the TCON board outside, and the whole television factories conduct self-grinding and production. The liquid crystal television set self-made by the complete machine factory and having the TCON module is called as tconless liquid crystal television. The application specific ICs used on the home-made TCON module generally include PMIC, PGAMMA, levelshifter, etc., which are collectively referred to as TCON driver ICs. The TCON driver IC is further divided into two types, non-Volatile Memory (NVM) and Non-NVM. The driver IC with NVM can fulfill the requirements of storing and reading/writing the required program. The TCON driver IC without NVM can only operate by means of a re-real-time write procedure at each power-up. For security, the program written into the IC in real time is generally set and then put into the fixed partition without modification.
In recent years, television factories gradually select driver ICs without NVM (non-volatile memory) under the influence of market conditions of supply and shortage of TCON driver ICs and BOM (material) cost optimization consideration. However, by using such ICs, the VCOM (common voltage) value after on-line Flicker (screen flash) debugging on the production line cannot be stored in the driving IC, the temporary memory value is powered off and disappears, and the next power-on is restored to the value before debugging, so that the optimum design cannot be realized on the subjective image quality of the whole factory.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the writing method of the turnless LCD TV Flicker debugging value is provided, and the VCOM value after the on-line Flicker debugging can be written into the driving IC again aiming at the TCON driving IC without the NVM.
The technical scheme adopted for solving the technical problems is as follows:
a writing method of a Flicker debugging value of a Tconless liquid crystal display television comprises the following steps:
an address register is fixed by utilizing an unerased partition in the hardware of the television core and is used for storing a VCOM value generated after the complete machine Flicker is debugged to be qualified, and the VCOM value stored in the core is written into a TCON driving IC without NVM by utilizing the starting process of the complete machine.
As a further optimization, the method for fixing an address register by utilizing the non-erasable partition in the hardware of the television core comprises the following steps:
in the hardware partition of the main board of the television core, an independent program partition is divided, the independent program partition is non-erasable, and a fixed register address is designated under the partition.
As a further optimization, the method further comprises:
setting two register information in the liquid crystal screen parameter of the main software of the core main board, wherein the register information comprises a device address and a register address stored by VCOM; the device address is a VCOM value storage position in a core hardware partition, and the register address is a VCOM value storage position in a TCON driving IC;
for a TCON driver IC without NVM, there are two register specific information for setting the cartridge hardware partition and the TCON driver IC, and for a TCON driver IC with NVM, the cartridge hardware partition register information is set to a default value.
As a further optimization, the method for storing the VCOM value generated after the complete machine Flicker is qualified includes:
s1, performing on-line debugging of a Flicker by a core main software starting program;
s2, the main software of the main board of the movement reads address information of two VCOM registers set in the parameter of the current liquid crystal display;
s3, judging the storage position of the debugged VCOM value through the device address:
if the device address is identified as a default value, writing the debugged VCOM value into a designated position of the TCON driving IC, and storing;
if the device address is identified as the core hardware partition, writing the debugged VCOM value into a core hardware partition appointed address register, and storing.
As a further optimization, the writing of the VCOM value stored in the core into the TCON driving IC without NVM by using the whole machine starting process specifically includes:
a. after the core main board is electrified, before the backlight is lightened, the main software performs a first conventional write-in procedure operation, and basic program writing is performed on the TCON driving IC by detecting screen parameter information of the liquid crystal module, so that the liquid crystal screen is normally displayed;
b. after the movement main board system is started, performing a second writing operation:
reading register address information stored in two VCOMs in the parameter of the liquid crystal display, and stopping the writing operation if the first register information is identified as a default value;
if the first register device address is identified as the core hardware partition, further reading the VCOM specified address register value, if the register value is a default value, stopping the writing operation, and if the register value is a non-default value, writing the value into the TCON drive IC specified register position.
As a further optimization, the first write operation to the TCON driver IC occurs in a boot stage before the backlight is turned on, and the second write operation occurs in a kernel stage after the system is started.
As a further optimization, the write command data format of the VCOM value adopts IIC or SPI format.
The beneficial effects of the invention are as follows:
the hardware partition of the main software is stored by the core board, a fixed address register is searched, the VCOM value after the production line Flicker is debugged is stored, and the VCOM value is written into the TCON driving IC by a secondary writing method, so that the problem that the TCON driving IC without the NVM can not store the production line Flicker debugging value is solved, the on-line debugging result of a liquid crystal television product is restored, and the subjective effect of the liquid crystal television is improved.
Drawings
FIG. 1 is a schematic diagram showing the storage locations of VCOM values on a core board in the present invention;
FIG. 2 is a schematic diagram of the content to be set in the screen parameter information of the liquid crystal screen according to the present invention;
FIG. 3 is a flow chart of the saving of the Flicker debug VCOM value in the present invention;
FIG. 4 is a flow chart of VCOM value writing after the Flicker debugging in the present invention.
Detailed Description
The invention aims to provide a writing method of a Flicker debugging value of a Tconless liquid crystal television, which aims at a TCON driving IC without NVM, and realizes that the VCOM value after the Flicker is debugged on line can be written into the driving IC again. The core idea is as follows: and fixing a register in the non-erasable part of the hardware partition of the main chip of the liquid crystal display television, wherein the register is used for storing the VCOM value after the completion of the production line Flicker debugging. After the machine core board is electrified to complete the writing process of the TCON driving IC each time, the VCOM register value in the partition is written into the corresponding TCON driving IC through the bus, and the method solves the problem that the NVM driving chip in the TCON module cannot store the debugging value, reduces the BOM cost of the whole machine and improves the subjective performance of the whole machine.
Examples:
the writing method of the Flicker debugging value of the Tconless liquid crystal television in the embodiment comprises the following steps:
an address register is fixed by utilizing an unerased partition in the machine core hardware of the television and is used for storing a VCOM value generated after the complete machine Flicker is debugged to be qualified. And writing the VCOM value stored in the movement into the TCON driving IC without the NVM by using the starting process of the whole machine.
In a specific implementation, the method comprises the following operations:
first, as shown in fig. 1, in the hardware partition of the deck, an independent program partition is divided, and the partition is non-erasable. And designating a fixed register address under the partition for storing the VCOM value.
Secondly, two register information are added in the liquid crystal screen parameter of the main software of the core main board, as shown in fig. 2. The register information includes a device address and a register address of the VCOM memory. The first is the VCOM value storage position in the core hardware partition, and the second is the VCOM storage position in the TCON driving IC.
For a TCON driver IC without NVM, two register specific information of the cartridge hardware partition and the TCON driver IC will be set, while for a TCON driver IC with NVM, the cartridge hardware partition register information is set to a default value (00 or FF).
Then, the movement is powered on, and the main software performs the following action steps, as shown in fig. 4:
a1, powering on a core main board for the first time, performing a first conventional write-in procedure operation by main software before backlight is lightened in a boot stage, and writing in a basic program of a TCON drive IC (remote control on a display) by detecting screen parameter information of a liquid crystal module, wherein the liquid crystal screen is normally displayed;
a2, performing a second write operation in a Kernel stage after the movement main board system is started, reading register address information stored in two VCOMs in the parameter of the liquid crystal display, and stopping the write operation if the first register information is identified as 00 or FF.
A3, if the first register device address organic core hardware partition is identified, further reading the VCOM specified address register value. If the complete machine does not perform the Flicker debugging at this time, the register value is a default value (00 or FF), and the write process is terminated. If the complete machine has performed the Flicker debugging, the register value is a non-default value, and at this time, the register value is written into the TCON driving IC.
In the above process, the non-default value in the register is derived from the on-line debug save result of the Flicker, and specifically comprises the following steps:
a. performing on-line debugging on a Flicker by a core main software starting program;
b. the main software of the main board of the movement reads address information of two VCOM registers set in the parameter of the current liquid crystal display;
c. judging the storage position of the debugged VCOM value through the device address:
if the first register information is identified as 00 or FF, writing the debugged VCOM value into the appointed position of the TCON driving IC and storing;
if the first register information is identified as the core hardware partition, writing the debugged VCOM value into the core hardware partition appointed address register, and storing.
Specifically, in this embodiment, the VCOM value writing register command adopts IIC or SPI data format.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are examples only, and that many other modifications and embodiments can be made by those skilled in the art, which will fall within the scope and spirit of the principles of the disclosure.
Claims (4)
- A writing method of a Flicker debugging value of a Tconless liquid crystal display television is characterized by comprising the following steps:firstly, dividing an independent program partition in a hardware partition of a main board of a television core, wherein the independent program partition is non-erasable, and a fixed register address is designated under the partition and used for storing a VCOM value generated after complete machine Flicker debugging is qualified;then, setting two register information in the liquid crystal screen parameter of the main software of the core main board, wherein the register information comprises a device address and a register address stored by VCOM; the device address is a VCOM value storage position in a hardware partition of the core main board, and the register address is a VCOM value storage position in the TCON driving IC; for a TCON driving IC without NVM, two register specific information of a hardware partition of a core main board and the TCON driving IC are set, and for the TCON driving IC with NVM, the register information of the hardware partition of the core main board is set as a default value;finally, the VCOM value stored in the hardware partition of the core main board is written into the TCON driving IC without the NVM by using the whole machine starting process, and the method specifically comprises the following steps:a. after the core main board is electrified, before the backlight is lightened, main software of the core main board can perform a first conventional write-in operation, basic program writing is performed on the TCON driving IC by detecting parameter of the liquid crystal screen, and the liquid crystal screen is normally displayed;b. after the movement main board system is started, performing a second writing operation:reading information of two registers in the parameter of the liquid crystal display, and if the device address stored in the VCOM is identified as a default value, stopping the writing operation;if the device address stored by the VCOM is identified as the hardware partition of the core main board, further reading the VCOM specified address register value in the hardware partition of the core main board, stopping the writing operation if the register value is a default value, and writing the register value into the TCON drive IC specified register position if the register value is a non-default value.
- 2. The method for writing the Flicker debugging value of the Tconless liquid crystal television set as set forth in claim 1, wherein,the method for storing the VCOM value generated after the complete machine Flicker is debugged to be qualified comprises the following steps:s1, performing on-line debugging of a Flicker by a main software starting program of a core main board;s2, the main software of the main board of the movement reads information of two registers arranged in the current parameter of the liquid crystal display;s3, judging the storage position of the debugged VCOM value through the device address:if the device address is identified as a default value, writing the debugged VCOM value into a designated position of the TCON driving IC, and storing;if the device address is identified as the hardware partition of the movement, writing the debugged VCOM value into a hardware partition appointed address register of a main board of the movement, and storing the VCOM value.
- 3. The method for writing a Flicker debugging value of a Tconless lcd tv according to claim 1 or 2, wherein the first writing operation to the TCON driver IC occurs in a boot stage before the backlight is turned on, and the second writing operation occurs in a kernel stage after the system is started.
- 4. The method for writing a Flicker debug value of a Tconless lcd tv according to claim 1 or 2, wherein a write command data format of the VCOM value adopts IIC or SPI format.
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Citations (6)
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| CN103137088A (en) * | 2011-11-22 | 2013-06-05 | 乐金显示有限公司 | Circuit for driving liquid crystal display device |
| JP2015025837A (en) * | 2013-07-24 | 2015-02-05 | シナプティクス・ディスプレイ・デバイス株式会社 | Display control device and semiconductor integrated circuit |
| CN104464664A (en) * | 2014-11-21 | 2015-03-25 | 深圳市立德通讯器材有限公司 | Method for automatically correcting liquid crystal display screen Flicker |
| CN104570426A (en) * | 2015-02-10 | 2015-04-29 | 武汉精测电子技术股份有限公司 | VCOM data burning and verification method of liquid crystal module |
| CN105681700A (en) * | 2016-01-28 | 2016-06-15 | 四川长虹电器股份有限公司 | Flicker debugging method and device for liquid crystal display television |
| CN109192155A (en) * | 2018-09-11 | 2019-01-11 | 四川长虹电器股份有限公司 | The method that Tconless LCD TV carries out screen flicker debugging automatically |
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2021
- 2021-12-23 CN CN202111587161.1A patent/CN114268754B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137088A (en) * | 2011-11-22 | 2013-06-05 | 乐金显示有限公司 | Circuit for driving liquid crystal display device |
| JP2015025837A (en) * | 2013-07-24 | 2015-02-05 | シナプティクス・ディスプレイ・デバイス株式会社 | Display control device and semiconductor integrated circuit |
| CN104464664A (en) * | 2014-11-21 | 2015-03-25 | 深圳市立德通讯器材有限公司 | Method for automatically correcting liquid crystal display screen Flicker |
| CN104570426A (en) * | 2015-02-10 | 2015-04-29 | 武汉精测电子技术股份有限公司 | VCOM data burning and verification method of liquid crystal module |
| CN105681700A (en) * | 2016-01-28 | 2016-06-15 | 四川长虹电器股份有限公司 | Flicker debugging method and device for liquid crystal display television |
| CN109192155A (en) * | 2018-09-11 | 2019-01-11 | 四川长虹电器股份有限公司 | The method that Tconless LCD TV carries out screen flicker debugging automatically |
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