CN107705770B - Gamma voltage output circuit based on digital PMIC - Google Patents
Gamma voltage output circuit based on digital PMIC Download PDFInfo
- Publication number
- CN107705770B CN107705770B CN201711177290.7A CN201711177290A CN107705770B CN 107705770 B CN107705770 B CN 107705770B CN 201711177290 A CN201711177290 A CN 201711177290A CN 107705770 B CN107705770 B CN 107705770B
- Authority
- CN
- China
- Prior art keywords
- gamma
- voltage
- reference voltage
- gamma reference
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
the invention relates to a gamma voltage output circuit based on a digital PMIC, which comprises an Analog Voltage (AVDD) input G L DO module and a comparator, wherein the G L DO module outputs a first gamma reference voltage (Vref1) to the comparator and an alternative selector, a second gamma reference voltage (Vref2) is input to the alternative selector, the second gamma reference voltage (Vref2) is equal to or more than the set value of the gamma reference voltage (Vref), when the Analog Voltage (AVDD) > the first gamma reference voltage (Vref1), the comparator controls the alternative selector to output the first gamma reference voltage (Vref1) as the gamma reference voltage (Vref), when the Analog Voltage (AVDD) < the first gamma reference voltage (Vref1), the second gamma reference voltage (Vref2) is output to a gamma correction module, and the gamma correction module outputs the gamma voltage.
Description
Technical Field
The invention relates to the field of liquid crystal displays, in particular to a gamma voltage output circuit based on a digital PMIC.
Background
as shown in fig. 1, the Digital PMIC is an internal block diagram of a Gamma (Gamma) voltage and a Gamma reference voltage Vref part of an existing Digital PMIC, and shows a part of the Digital PMIC related to a Gamma voltage output, and mainly includes a register (register), a Digital-to-analog converter (DAC), a G L DO (low dropout linear regulator) module, and a Gamma correction module, data input from a data line SDA and a clock signal line SC L of an I2C bus are stored in the register, a Digital signal output from the register is converted into an analog signal by the Digital-to-analog converter, and then the analog signal is input into the G L DO module and the Gamma correction module, the G L DO module is a low dropout linear regulator for generating a Gamma reference voltage Vref according to the input analog signal and an analog voltage AVDD for Gamma correction, and then the G L DO module outputs a common Gamma reference voltage Vref to the Gamma correction module, and the Gamma correction module outputs Gamma voltages GM14 to GM 52 corresponding to the Gamma correction circuits respectively.
in the conventional scheme, when the AVDD and Vref are set incorrectly in the register based on the digital PMIC output gamma voltage, for example, the register is set to have a value of AVDD 15.6V and Vref 16.2V, and at this time, because AVDD < Vref, the maximum gamma reference voltage Vref _ max is AVDD 0.1V (the differential pressure is determined by the characteristics of the G L DO module, and the minimum differential pressure is generally 0.1V and 15.5V), so that the gamma voltages GM 1-GM 14 are all referred to by Vref 15.5V, and actually, the required voltage is referred to by Vref 16.2V, which results in abnormal gamma voltage output and abnormal screen display, and therefore, there is a need for improvement.
Disclosure of Invention
Therefore, an object of the present invention is to provide a gamma voltage output circuit based on digital PMIC, which solves the problem of abnormal gamma voltage output caused by setting errors of the analog voltage AVDD and the gamma reference voltage Vref in the register.
To achieve the above object, the present invention provides a gamma voltage output circuit based on a digital PMIC, comprising: the device comprises a register, a digital-to-analog converter, a low dropout linear regulator module, a comparator, an alternative selector and a gamma correction module;
The digital signal output by the register is converted into an analog signal by a digital-to-analog converter and then input into a low dropout linear regulator module and a gamma correction module;
A first input end of the low dropout linear regulator module receives analog voltage, and a second input end of the low dropout linear regulator module is connected with a digital-to-analog converter to receive analog signals; the output end of the low dropout regulator module is respectively connected with the first input end of the comparator and the first input end of the alternative selector so as to output a first gamma reference voltage;
The second input end of the comparator receives the analog voltage, and the output end of the comparator is connected with the control end of the alternative selector to output a control signal;
The output end of the two-of-one selector is connected with the gamma correction module to output gamma reference voltage to the gamma correction module, and the second input end of the two-of-one selector receives second gamma reference voltage which is not less than the set value of the gamma reference voltage; the output end of the alternative selector selects and outputs a first gamma reference voltage or a second gamma reference voltage as a gamma reference voltage according to the control signal input by the control end;
The gamma correction module outputs a gamma voltage according to the input analog signal and a gamma reference voltage.
When the analog voltage > the first gamma reference voltage, the two-select selector outputs the first gamma reference voltage as a gamma reference voltage.
When the analog voltage is less than the first gamma reference voltage, the two-selection selector outputs the second gamma reference voltage as the gamma reference voltage.
The gamma reference voltage generating circuit comprises a voltage reducing circuit, wherein the input end of the voltage reducing circuit receives high level, and the output end of the voltage reducing circuit is connected with the second input end of the alternative selector so as to output second gamma reference voltage to the alternative selector.
The high level is a gate-on voltage in the liquid crystal driving circuit.
wherein the high level is not less than 2 times the analog voltage.
Wherein the high level range is 28-36 volts, and the analog voltage range is 14-16 volts.
Wherein, this step-down circuit includes:
The anode of the three-terminal adjustable shunt reference source is grounded, the reference terminal is connected with the first terminal of the first resistor and the second terminal of the second resistor, and the cathode is connected with the first terminal of the third resistor;
The second end of the capacitor is connected with the reference end of the three-end adjustable shunt reference source, and the first end of the capacitor is connected with the first end of the third resistor;
An NPN type triode, wherein the base electrode of the NPN type triode is connected with the first end of the third resistor, the emitter electrode of the NPN type triode is connected with the first end of the second resistor, and the collector electrode of the NPN type triode is connected with the second end of the fourth resistor;
The second end of the first resistor is grounded;
The second end of the third resistor and the first end of the fourth resistor are connected with the input end of the high level;
The first end of the second resistor is connected with the output end of the second gamma reference voltage.
wherein, the second gamma reference voltage is 2.5+2.5 × the second resistance value/(the first resistance value + the second resistance value).
Wherein, the set value of the gamma reference voltage is 16.2 volts.
Wherein, the second resistance value is 137 kilo-ohm, and the first resistance value is 10 kilo-ohm.
In summary, the gamma voltage output circuit based on the digital PMIC of the present invention ensures that the gamma reference voltage Vref can be normally output when the settings of the analog voltage AVDD and the gamma reference voltage Vref are incorrect in the register, thereby ensuring that the gamma voltage is not abnormal and the display of the image is not abnormal.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
In the drawings, there is shown in the drawings,
FIG. 1 is an internal block diagram of the gamma voltage and the gamma reference voltage Vref part of a conventional digital PMIC;
FIG. 2 is a schematic circuit diagram of a gamma voltage output circuit based on digital PMIC according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a voltage step-down circuit according to a preferred embodiment of the gamma voltage output circuit based on digital PMIC.
Detailed Description
referring to fig. 2, which is a schematic circuit diagram of a preferred embodiment of the gamma voltage output circuit based on the digital PMIC of the present invention, showing a portion of the digital PMIC related to the gamma voltage output, the gamma voltage output circuit based on the digital PMIC of the present invention mainly includes a register, a digital-to-analog converter, a G L DO (low voltage difference linear regulator) module, a comparator, a one-out-of-two selector, a step-down circuit and a gamma correction module, wherein a digital signal output from the register is converted into an analog signal by the digital-to-analog converter and then input into the G L DO module and the gamma correction module, an analog voltage AVDD is input into the G L DO module and the comparator, the G L DO module outputs a gamma reference voltage Vref1 to the comparator and the one-out-of-two selector, a high level VGH is input into the step-down circuit, the step-down circuit outputs a gamma reference voltage Vref2 to the one-out-of-two-out-of-one selector, and the gamma reference voltage Vref2 is greater than a set value of the gamma reference voltage Vref, when the analog voltage AVDD > the analog reference voltage Vref1, the gamma reference voltage Vref 56, the comparator controls the gamma voltage Vref to output as a common gamma correction voltage Vref, and when the gamma reference voltage AVDD is greater than the gamma voltage Vref 465929, the gamma voltage Vref, the gamma correction voltage Vref, the gamma reference voltage Vref, the gamma voltage Vref 46dd.
the G L DO module can be a low dropout linear regulator for generating a gamma reference voltage Vref1, the gamma correction module can correspondingly output fourteen gamma voltages GM 1-GM14 respectively, data input from a data line SDA and a clock signal line SC L of an I2C bus are stored in a register, and the high-level VGH can be a gate-on voltage in the liquid crystal driving circuit and can be set to be VGH more than or equal to 2 × AVDD, a VGH range of 28-36V and an AVDD range of 14-16V.
The invention compares AVDD and Vref1 through a comparator, when AVDD > Vref1, the Control signal Control is output at high level (high level), at this time, the alternative selector controls Vref to Vref1, so that Vref output is normal, thus all gamma voltages can be normally output, when AVDD < Vref is found, the Control signal Control is output at low level (low level), at this time, the alternative selector controls the gamma reference voltage Vref to Vref2, Vref2 enables VGH to be generated by voltage reduction through a voltage reduction circuit, Vref2 is not less than the set value of the gamma reference voltage Vref, at this time, the gamma reference voltage Vref output is ensured to be normal, so that the gamma voltages GM 1-GM 14 can be normally output by taking the common gamma reference voltage Vref as reference.
referring to fig. 3, which is a schematic diagram of a voltage dropping circuit according to the preferred embodiment, the voltage dropping circuit mainly includes, as a specific example of the voltage dropping circuit in fig. 2, a three-terminal adjustable shunt reference source T L431 (IC4) having an anode grounded, a reference terminal connected to a first terminal of a first resistor R1 and a second terminal of a second resistor R2, a cathode connected to a first terminal of a third resistor R3, a capacitor C11 having a second terminal connected to a reference terminal of T L431 and a first terminal connected to a first terminal of the third resistor R3, an NPN-type triode T5 having a base connected to a first terminal of the third resistor R3, an emitter connected to a first terminal of the second resistor R2, a collector connected to a second terminal of the fourth resistor R4, a second terminal of the first resistor R1 grounded, a second terminal of the third resistor R3 and a first terminal of the fourth resistor R4 connected to an input terminal of a high level VGH, and a first terminal of the second resistor vgr 2 connected to an output terminal of a reference voltage Vref 2.
when AVDD and Vref1 cause AVDD < Vref1 due to register setting error, the invention ensures that the gamma reference voltage Vref can be normally output by the voltage reduction circuit formed by VGH + T L431, thereby ensuring that the gamma voltage can not be abnormal to cause the abnormal display of the picture.
For example: assuming that the analog voltage AVDD is set to 15.2V, the gamma reference voltage Vref is 16.2V, the gamma voltage GM1 is 15.9V, the GM2 is 15.4V, … …, and the GM14 is 0.41V, if the maximum gamma voltage Vref _ max is AVDD-0.1V (abnormal), and the maximum gamma voltage GM1_ max is 15.1V (abnormal), the maximum gamma voltage GM2_ max is 15.1V (abnormal), the GM 25-GM 634 may be normally output, which may cause the gamma curve (gamma curve) to shift and display an abnormal, and if the present invention is designed, the present invention may ensure that the Vref2 is 16.2V, the first gamma voltage Vref 7 is 137K, R1 is 10K, and the Vref 4615 is Vref 7.2V, and the normal GM 9 is no longer displayed (abnormal).
In summary, the gamma voltage output circuit based on the digital PMIC of the present invention ensures that the gamma reference voltage Vref can be normally output when the settings of the analog voltage AVDD and the gamma reference voltage Vref are incorrect in the register, thereby ensuring that the gamma voltage is not abnormal and the display of the image is not abnormal.
As described above, it will be apparent to those skilled in the art that various other changes and modifications can be made based on the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.
Claims (7)
1. A gamma voltage output circuit based on a digital PMIC, comprising: the device comprises a register, a digital-to-analog converter, a low dropout linear regulator module, a comparator, an alternative selector and a gamma correction module;
The digital signal output by the register is converted into an analog signal by a digital-to-analog converter and then input into a low dropout linear regulator module and a gamma correction module;
A first input end of the low dropout linear regulator module receives an Analog Voltage (AVDD), and a second input end of the low dropout linear regulator module is connected with a digital-to-analog converter to receive an analog signal; the output end of the low dropout regulator module is respectively connected with the first input end of the comparator and the first input end of the alternative selector so as to output a first gamma reference voltage (Vref 1);
A second input end of the comparator receives an Analog Voltage (AVDD), and an output end of the comparator is connected with a Control end of the alternative selector to output a Control signal (Control);
The output end of the two-of-one selector is connected with the gamma correction module to output a gamma reference voltage (Vref) to the gamma correction module, the second input end of the two-of-one selector receives a second gamma reference voltage (Vref2), and the second gamma reference voltage (Vref2) is not less than the set value of the gamma reference voltage (Vref); the output end of the alternative selector selects and outputs a first gamma reference voltage (Vref1) or a second gamma reference voltage (Vref2) as a gamma reference voltage (Vref) according to a Control signal (Control) input by the Control end;
The gamma correction module outputs gamma voltages (GM 1-GM 14) according to the input analog signal and a gamma reference voltage (Vref);
When the Analog Voltage (AVDD) > the first gamma reference voltage (Vref1), the one-out-of-two selector outputs the first gamma reference voltage (Vref1) as the gamma reference voltage (Vref);
When the Analog Voltage (AVDD) < the first gamma reference voltage (Vref1), the one-out-of-two selector outputs the second gamma reference voltage (Vref2) as the gamma reference voltage (Vref).
2. The gamma voltage output circuit of claim 1 further comprising a buck circuit having an input receiving a high level (VGH) and an output connected to the second input of the one of the two selectors to output a second gamma reference voltage (Vref2) to the one of the two selectors.
3. The gamma voltage output circuit of claim 2, wherein the high level (VGH) is a gate turn-on voltage of a liquid crystal driver.
4. the gamma voltage output circuit of claim 2 wherein the high voltage level (VGH) ≧ 2 × the Analog Voltage (AVDD).
5. The gamma voltage output circuit of claim 4, wherein the high voltage level (VGH) ranges from 28 to 36 volts and the Analog Voltage (AVDD) ranges from 14 to 16 volts.
6. The digital PMIC-based gamma voltage output circuit of claim 2, wherein the voltage dropping circuit comprises:
The anode of the three-terminal adjustable shunt reference source is grounded, the reference terminal is connected with the first terminal of the first resistor and the second terminal of the second resistor, and the cathode is connected with the first terminal of the third resistor;
The second end of the capacitor is connected with the reference end of the three-end adjustable shunt reference source, and the first end of the capacitor is connected with the first end of the third resistor;
An NPN type triode, wherein the base electrode of the NPN type triode is connected with the first end of the third resistor, the emitter electrode of the NPN type triode is connected with the first end of the second resistor, and the collector electrode of the NPN type triode is connected with the second end of the fourth resistor;
The second end of the first resistor is grounded;
The second end of the third resistor and the first end of the fourth resistor are connected with the input end of the high level (VGH);
The first terminal of the second resistor is connected to the output terminal of the second gamma reference voltage (Vref 2).
7. the gamma voltage output circuit of claim 6, wherein the second gamma reference voltage (Vref2) is 2.5+2.5 × second resistance value/(the first resistance value + the second resistance value).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177290.7A CN107705770B (en) | 2017-11-22 | 2017-11-22 | Gamma voltage output circuit based on digital PMIC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177290.7A CN107705770B (en) | 2017-11-22 | 2017-11-22 | Gamma voltage output circuit based on digital PMIC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107705770A CN107705770A (en) | 2018-02-16 |
| CN107705770B true CN107705770B (en) | 2020-07-28 |
Family
ID=61180738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711177290.7A Active CN107705770B (en) | 2017-11-22 | 2017-11-22 | Gamma voltage output circuit based on digital PMIC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107705770B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102530011B1 (en) * | 2018-10-11 | 2023-05-10 | 삼성디스플레이 주식회사 | Comparator and receiver inluding the same |
| KR20200122456A (en) * | 2019-04-17 | 2020-10-28 | 삼성디스플레이 주식회사 | Display device including a plurality of data drivers |
| CN110767187A (en) * | 2019-10-08 | 2020-02-07 | 深圳市华星光电半导体显示技术有限公司 | Reference voltage generating circuit, display device, and electronic apparatus |
| CN114207698B (en) * | 2020-05-19 | 2023-12-22 | 京东方科技集团股份有限公司 | Power management device and display device |
| CN112071280B (en) * | 2020-09-22 | 2022-05-31 | 禹创半导体(深圳)有限公司 | Fast gamma switching method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364388A (en) * | 2007-08-07 | 2009-02-11 | 奇美电子股份有限公司 | Novel integrated DC transducer applied to LCD |
| CN203787066U (en) * | 2014-04-24 | 2014-08-20 | 成都京东方光电科技有限公司 | Liquid crystal drive circuit and liquid crystal display device |
| KR20150058649A (en) * | 2013-11-19 | 2015-05-29 | 주식회사 실리콘웍스 | Circuit and method for supplying gamma voltage, and power management ic |
| CN104732949A (en) * | 2015-04-17 | 2015-06-24 | 京东方科技集团股份有限公司 | Gamma voltage generating circuit, driving unit, display device and method for adjusting color coordinates |
| CN106057113A (en) * | 2015-04-03 | 2016-10-26 | 三星显示有限公司 | Power management driver and display device having same |
-
2017
- 2017-11-22 CN CN201711177290.7A patent/CN107705770B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364388A (en) * | 2007-08-07 | 2009-02-11 | 奇美电子股份有限公司 | Novel integrated DC transducer applied to LCD |
| KR20150058649A (en) * | 2013-11-19 | 2015-05-29 | 주식회사 실리콘웍스 | Circuit and method for supplying gamma voltage, and power management ic |
| CN203787066U (en) * | 2014-04-24 | 2014-08-20 | 成都京东方光电科技有限公司 | Liquid crystal drive circuit and liquid crystal display device |
| CN106057113A (en) * | 2015-04-03 | 2016-10-26 | 三星显示有限公司 | Power management driver and display device having same |
| CN104732949A (en) * | 2015-04-17 | 2015-06-24 | 京东方科技集团股份有限公司 | Gamma voltage generating circuit, driving unit, display device and method for adjusting color coordinates |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107705770A (en) | 2018-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107705770B (en) | Gamma voltage output circuit based on digital PMIC | |
| US20070262972A1 (en) | Gamma Correction Circuit and Display Device Including Same | |
| EP3806080A1 (en) | Power supply timing control circuit, control method, display drive circuit, and display device | |
| TWI736253B (en) | Driving circuit for gamma voltage generator and gamma voltage generator using the same | |
| US20170032758A1 (en) | Gamma reference voltage generator and display device having the same | |
| US20180254012A1 (en) | Buffer circuit, panel module, and display driving method | |
| US20130257397A1 (en) | Current Calibration Method and Associated Circuit | |
| CN107871467B (en) | Sensing circuit | |
| US20160171936A1 (en) | Gamma curve correction method for a liquid crystal display | |
| US6424281B1 (en) | DAC with adjusting digital codes corresponded to reference voltages | |
| US20110298780A1 (en) | Reference voltage generation circuit, power source device, liquid crystal display device | |
| JP2015176120A (en) | Display driver, electrooptical device and electronic apparatus | |
| KR20190055873A (en) | Display panel driving device and display apparatus having the same | |
| US20070146355A1 (en) | Driver and display device including the same | |
| KR102422744B1 (en) | Display device and driving method thereof | |
| US20170309241A1 (en) | Display apparatus and a method of driving the same | |
| US20090115920A1 (en) | Liquid crystal display device and test method therefor | |
| US20090243989A1 (en) | Display apparatus | |
| US20140368253A1 (en) | Level conversion circuit and method for converting voltage level thereof | |
| US20190325810A1 (en) | Driving circuit and operating method thereof | |
| TWI544472B (en) | Source driver, display driving circuit, and display apparatus | |
| WO2022222409A1 (en) | Sampling circuit, light detection system, display device, and sampling method | |
| CN113823348B (en) | Shift register unit, driving method thereof, shift register and display device | |
| US10229628B2 (en) | Gamma voltage generator and display device including the same | |
| CN112331142B (en) | Scanning driving circuit, display panel and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL Huaxing Photoelectric Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |