CN107331357A - Improve the method for liquid crystal display panel ghost - Google Patents
Improve the method for liquid crystal display panel ghost Download PDFInfo
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- CN107331357A CN107331357A CN201710482799.6A CN201710482799A CN107331357A CN 107331357 A CN107331357 A CN 107331357A CN 201710482799 A CN201710482799 A CN 201710482799A CN 107331357 A CN107331357 A CN 107331357A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000003247 decreasing effect Effects 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
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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
-
- 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
- G09G2320/0257—Reduction of after-image effects
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- 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 present invention provides a kind of method of improvement liquid crystal display panel ghost.The common electric voltage that this method takes flicker value when liquid crystal display panel shows the picture of 255 GTGs when being a default flicker value is the first common electric voltage, and first common electric voltage is increased or decreased into default voltage deviation obtain the second common electric voltage, standard gamma curve according to the liquid crystal display panel on the basis of the second common electric voltage is adjusted to the corresponding initial gray scale voltage of multiple default GTGs in addition to 255 GTGs, obtain amendment gray scale voltage corresponding with multiple default GTGs, when liquid crystal display panel is shown, utilize the second common electric voltage, multiple amendment gray scale voltages, and the initial gray scale voltage of the default GTG of correspondence 255 is driven to it, the region of the GTG of display 255 can be made to produce direct current residual, the luminance difference between other regions is offset when other grey menus are shown after, effectively improve reverse ghost, lift display quality.
Description
Technical field
The present invention relates to technical field of liquid crystal display, more particularly to a kind of method of improvement liquid crystal display panel ghost.
Background technology
With the development of Display Technique, the plane such as liquid crystal display (Liquid Crystal Display, LCD) display dress
Put because having the advantages that high image quality, power saving, fuselage is thin and has a wide range of application, and be widely used in mobile phone, TV, individual number
The various consumption electronic products such as word assistant, digital camera, notebook computer, desktop computer, as the master in display device
Stream.
Liquid crystal display on existing market is largely backlight liquid crystal display, and it includes liquid crystal display panel and the back of the body
Optical mode group (backlight module).The operation principle of liquid crystal display panel is in thin-film transistor array base-plate (Thin
Film Transistor Array Substrate, TFT Array Substrate) and colored filter substrate (Color
Filter, CF) between pour into liquid crystal molecule, and apply driving voltage to control the rotation side of liquid crystal molecule on two plate bases
To the light of backlight module is reflected into generation picture.
In current TFT-LCD, the problem of generally existing ghost (Image Sticking, IS).Its detection method one
As be：First, liquid crystal display panel is made to keep showing the alternate gridiron pattern picture of black and white (generally 7 days) for a period of time, afterwards,
Liquid crystal display panel is set to show the picture of preset gray scale, now, it is found that the original tessellated image of liquid crystal display panel residual,
The brightness when showing the picture of preset gray scale of the corresponding viewing area in i.e. tessellated white area and black area is variant.It is default in display
During the picture of GTG, if the corresponding region in original tessellated white area region more corresponding than black area is bright, it is referred to as positive ghost,
, whereas if the corresponding region in tessellated white area region more corresponding than black area is dark originally, referred to as reverse ghost.Ghost is deposited
Sampled in the display that can reduce liquid crystal display panel, reduce product quality.
Therefore, it is necessary to a kind of method for improving liquid crystal display panel ghost is proposed to solve the above problems.
The content of the invention
Improve the method for liquid crystal display panel ghost it is an object of the invention to provide a kind of, liquid crystal can be effectively improved
Show the reverse ghost of panel, lift display quality.
To achieve the above object, the present invention provides a kind of method of improvement liquid crystal display panel ghost, comprises the following steps：
Step S1, one liquid crystal display panel of offer, the standard gamma curve of the acquisition liquid crystal display panel, and according to
The standard gamma curve obtains multiple target brightness values corresponding with multiple default GTGs in addition to 255 GTGs respectively；
Step S2, acquisition are when the liquid crystal display panel shows 255 grey menu so that the flicker of liquid crystal display panel
It is worth for the first common electric voltage of a default flicker value；
Step S3, the first common electric voltage increased or decreased into default voltage deviation, obtain the second common electric voltage；
Step S4, to the liquid crystal display panel the second common electric voltage is inputted, it is and defeated to the liquid crystal display panel successively
Enter multiple initial gray scale voltages of the multiple default GTGs of default correspondence, when often inputting an initial gray scale voltage, constantly adjustment
The initial gray scale voltage until the brightness of now liquid crystal display panel reach to should initial gray scale voltage default GTG pair
The target brightness value answered, obtains multiple amendment gray scale voltages corresponding with multiple default GTGs；
Step S5, the initial ash using the second common electric voltage, multiple amendment gray scale voltages and the GTG of default correspondence 255
Rank voltage driving liquid crystal display panel is shown.
The detailed process that the step S1 obtains the standard gamma curve of the liquid crystal display panel is：One brightness is provided
Sensing device further, makes the liquid crystal display panel show 0 grey menu and 255 grey menus respectively, is filled using the brightness sensing
Brightness when acquisition liquid crystal display panel shows 0 grey menu and 255 grey menu is put, 0 ash is shown using liquid crystal display panel
Brightness and default standard Gamma values when rank picture and 255 grey menu, the standard Gamma for obtaining liquid crystal display panel are bent
Line.
The standard gamma curve of the liquid crystal display panel is met：
(Lx-Lmin)/(Lmax-Lmin)=(x/255)γ；
Wherein, LminBrightness during 0 grey menu, L are shown for liquid crystal display panelmax255 are shown for liquid crystal display panel
Brightness during grey menu, γ is that default standard Gamma values, 0≤x ＜ 256, and x are integer, LxTo be corresponding with x GTGs
Target brightness value.
The default standard Gamma values are 2.2.
The brightness of liquid crystal display panel is measured using the brightness sensing device in the step S4, to judge liquid
The brightness of LCD panel reaches target brightness value.
The voltage deviation is more than 0 and less than or equal to 2V.
The step S2 is specially：Initial common electric voltage and the GTG of default correspondence 255 are inputted to liquid crystal display panel
Initial gray scale voltage, makes liquid crystal display panel show 255 grey menus, to LCD while adjustment initial common electric voltage
The flicker value of plate is detected, until the flicker value of liquid crystal display panel is default flicker value, obtains the first common electric voltage.
The each default GTG of correspondence is preset with two unequal initial gray scale voltages.
Beneficial effects of the present invention：The method for a kind of improvement liquid crystal display panel ghost that the present invention is provided, in liquid crystal
Common electric voltage when flicker value is taken during the picture for showing the GTG of Display panel 255 is a default flicker value is the first common electric voltage, and
First common electric voltage is increased or decreased into default voltage deviation and obtains the second common electric voltage, in the base of the second common electric voltage
Standard gamma curve on plinth according to the liquid crystal display panel is corresponding to multiple default GTGs in addition to 255 GTGs initial
Gray scale voltage is adjusted, and is obtained amendment gray scale voltage corresponding with multiple default GTGs, is shown in liquid crystal display panel
When showing, using the initial gray scale voltage of the second common electric voltage, multiple amendment gray scale voltages and the GTG of default correspondence 255 to it
It is driven, the region of the GTG of display 255 can be made to produce direct current residual, offset and it when other grey menus are shown after
Luminance difference between his region, effectively improves reverse ghost, lifts display quality.
Brief description of the drawings
In order to be able to be further understood that the feature and technology contents of the present invention, refer to below in connection with the detailed of the present invention
Illustrate and accompanying drawing, however accompanying drawing only provide with reference to and explanation use, not for being any limitation as to the present invention.
In accompanying drawing,
Fig. 1 is the flow chart of the method for the improvement liquid crystal display panel ghost of the present invention.
Embodiment
Further to illustrate the technological means and its effect of the invention taken, below in conjunction with being preferable to carry out for the present invention
Example and its accompanying drawing are described in detail.
Referring to Fig. 1, the present invention provides a kind of method of improvement liquid crystal display panel ghost, comprise the following steps：
Step S1, one liquid crystal display panel of offer, the standard gamma curve of the acquisition liquid crystal display panel, and according to
The standard gamma curve obtains multiple target brightness values corresponding with multiple default GTGs in addition to 255 GTGs respectively.
Specifically, the detailed process of the standard gamma curve of the step S1 acquisitions liquid crystal display panel is：There is provided
One brightness sensing device, makes the liquid crystal display panel show 0 grey menu and 255 grey menus respectively, utilizes the brightness
Sensing device further obtains brightness when liquid crystal display panel shows 0 grey menu and 255 grey menu, aobvious using liquid crystal display panel
Brightness and default standard Gamma values when showing 0 grey menu and 255 grey menu, obtain the standard of liquid crystal display panel
Gamma curve.
Further, the standard gamma curve of the liquid crystal display panel is met：
(Lx-Lmin)/(Lmax-Lmin)=(x/255)γ；
Wherein, LminBrightness during 0 grey menu, L are shown for liquid crystal display panelmax255 are shown for liquid crystal display panel
Brightness during grey menu, γ is that default standard Gamma values, 0≤x ＜ 256, and x are integer, LxTo be corresponding with x GTGs
Target brightness value.
Preferably, the default standard Gamma values are 2.2.
Step S2, acquisition are when the liquid crystal display panel shows 255 grey menu so that the flicker of liquid crystal display panel
It is worth for the first common electric voltage of a default flicker value.
Specifically, the step S2 is specially：Initial common electric voltage and default correspondence are inputted to liquid crystal display panel
The initial gray scale voltage of 255 GTGs, makes liquid crystal display panel show 255 grey menus, while adjusting initial common electric voltage pair
The flicker value of liquid crystal display panel is detected, until the flicker value of liquid crystal display panel is default flicker value, obtains first public
Common voltage.
Step S3, the first common electric voltage increased or decreased into default voltage deviation, obtain the second common electric voltage.
Preferably, the voltage deviation is more than 0 and less than or equal to 2V.
Step S4, to the liquid crystal display panel the second common electric voltage is inputted, it is and defeated to the liquid crystal display panel successively
Enter multiple initial gray scale voltages of the multiple default GTGs of default correspondence, when often inputting an initial gray scale voltage, constantly adjustment
The initial gray scale voltage until the brightness of now liquid crystal display panel reach to should initial gray scale voltage default GTG pair
The target brightness value answered, obtains multiple amendment gray scale voltages corresponding with multiple default GTGs.
Specifically, the brightness of liquid crystal display panel is measured using the brightness sensing device in the step S4,
Target brightness value is reached with the brightness for judging liquid crystal display panel.
Specifically, each default GTG of correspondence is preset with two unequal initial gray scale voltages.
Step S5, the initial ash using the second common electric voltage, multiple amendment gray scale voltages and the GTG of default correspondence 255
Rank voltage driving liquid crystal display panel is shown.
It should be noted that the method for the improvement liquid crystal display panel ghost of the present invention, 255 are shown in liquid crystal display panel
Common electric voltage when flicker value is taken during the picture of GTG is a default flicker value is the first common electric voltage, and first common electric voltage is
For optimal common electric voltage of the liquid crystal display panel when showing 255 grey menu, first common electric voltage is increased added deduct afterwards
Few default voltage deviation obtains the second common electric voltage, according to the liquid crystal display panel on the basis of the second common electric voltage
Standard gamma curve is adjusted to the corresponding initial gray scale voltage of multiple default GTGs in addition to 255 GTGs, obtain with it is many
The corresponding amendment gray scale voltage of individual default GTG, namely other GTGs in addition to 255 GTGs are used as using second common electric voltage
Optimal common electric voltage, when liquid crystal display panel is shown, using the second common electric voltage, multiple amendment gray scale voltages and
The initial gray scale voltage of the default GTG of correspondence 255 is driven to it, and liquid crystal display panel is kept carrying out ghost detection
When showing the alternate gridiron pattern picture of black and white, show that the region of white square namely the region of 255 GTGs can produce direct current residual, make by
When the alternate gridiron pattern picture of black and white is changed into the picture of a default detection GTG, display white square before being allowed to due to direct current residual action
Region it is partially bright, can offset before display 255 GTGs and show 0 GTG region between luminance difference, effectively improve
Reverse ghost, lifts display quality；Similarly, when liquid crystal display panel is normally shown, show that the region of 255 GTGs is same
Sample produces direct current residual, and the regional display is partially bright when other grey menus are shown after, offsets bright between other regions
Difference is spent, reverse ghost is effectively improved, display quality is lifted.
In summary, the method for improvement liquid crystal display panel ghost of the invention, 255 GTGs are shown in liquid crystal display panel
Picture when common electric voltage when to take flicker value be a default flicker value be the first common electric voltage, and first common electric voltage is increased
The default voltage deviation that adds deduct less obtains the second common electric voltage, according to the liquid crystal display on the basis of the second common electric voltage
The standard gamma curve of panel is adjusted to the corresponding initial gray scale voltage of multiple default GTGs in addition to 255 GTGs, is obtained
To amendment gray scale voltage corresponding with multiple default GTGs, when liquid crystal display panel is shown, the second common electrical is utilized
The initial gray scale voltage of pressure, multiple amendment gray scale voltages and the GTG of default correspondence 255 is driven to it, can make display
The region of 255 GTGs produces direct current residual, and the luminance difference between other regions is offset when other grey menus are shown after
It is different, reverse ghost is effectively improved, display quality is lifted.
It is described above, for the person of ordinary skill of the art, can be with technique according to the invention scheme and technology
Other various corresponding changes and deformation are made in design, and all these changes and deformation should all belong to appended right of the invention
It is required that protection domain.
Claims (8)
1. a kind of improve the method for liquid crystal display panel ghost, it is characterised in that comprises the following steps：
Step S1, one liquid crystal display panel of offer, obtain the standard gamma curve of the liquid crystal display panel, and according to described
Standard gamma curve obtains multiple target brightness values corresponding with multiple default GTGs in addition to 255 GTGs respectively；
Step S2, obtain when the liquid crystal display panel shows 255 grey menu so that the flicker value of liquid crystal display panel is
First common electric voltage of one default flicker value；
Step S3, the first common electric voltage increased or decreased into default voltage deviation, obtain the second common electric voltage；
Step S4, input the second common electric voltage to the liquid crystal display panel, and input successively to the liquid crystal display panel pre-
If the multiple default GTGs of correspondence multiple initial gray scale voltages, often input an initial gray scale voltage when, constantly adjust this first
Beginning gray scale voltage until the brightness of now liquid crystal display panel reach to should initial gray scale voltage default GTG it is corresponding
Target brightness value, obtains multiple amendment gray scale voltages corresponding with multiple default GTGs；
Step S5, the initial GTG electricity using the second common electric voltage, multiple amendment gray scale voltages and the GTG of default correspondence 255
Pressure driving liquid crystal display panel is shown.
2. improve the method for liquid crystal display panel ghost as claimed in claim 1, it is characterised in that the step S1 obtains institute
The detailed process for stating the standard gamma curve of liquid crystal display panel is：One brightness sensing device is provided, makes the LCD
Plate shows 0 grey menu and 255 grey menus respectively, and obtaining liquid crystal display panel using the brightness sensing device shows 0 ash
Brightness when rank picture and 255 grey menu, it is bright when showing 0 grey menu and 255 grey menu using liquid crystal display panel
Degree and default standard Gamma values, obtain the standard gamma curve of liquid crystal display panel.
3. improve the method for liquid crystal display panel ghost as claimed in claim 2, it is characterised in that the liquid crystal display panel
Standard gamma curve meet：
(Lx-Lmin)/(Lmax-Lmin)=(x/255)γ；
Wherein, LminBrightness during 0 grey menu, L are shown for liquid crystal display panelmax255 GTGs are shown for liquid crystal display panel
Brightness during picture, γ is that default standard Gamma values, 0≤x ＜ 256, and x are integer, LxFor target corresponding with x GTGs
Brightness value.
4. improve the method for liquid crystal display panel ghost as claimed in claim 2, it is characterised in that the default standard
Gamma values are 2.2.
5. improve the method for liquid crystal display panel ghost as claimed in claim 2, it is characterised in that utilized in the step S4
Brightness of the brightness sensing device to liquid crystal display panel is measured, and target is reached with the brightness for judging liquid crystal display panel
Brightness value.
6. improve the method for liquid crystal display panel ghost as claimed in claim 1, it is characterised in that the voltage deviation is big
In 0 and less than or equal to 2V.
7. improve the method for liquid crystal display panel ghost as claimed in claim 1, it is characterised in that the step S2 is specific
For：The initial gray scale voltage of initial common electric voltage and the GTG of default correspondence 255 is inputted to liquid crystal display panel, makes liquid crystal
Show the grey menu of Display panel 255, the flicker value of liquid crystal display panel is detected while adjusting initial common electric voltage, directly
Flicker value to liquid crystal display panel is default flicker value, obtains the first common electric voltage.
8. improve the method for liquid crystal display panel ghost as claimed in claim 1, it is characterised in that each default ash of correspondence
Rank is preset with two unequal initial gray scale voltages.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482799.6A CN107331357B (en) | 2017-06-22 | 2017-06-22 | Improve the method for liquid crystal display panel ghost |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482799.6A CN107331357B (en) | 2017-06-22 | 2017-06-22 | Improve the method for liquid crystal display panel ghost |
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| Publication Number | Publication Date |
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| CN107331357A true CN107331357A (en) | 2017-11-07 |
| CN107331357B CN107331357B (en) | 2019-09-17 |
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ID=60195402
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597428A (en) * | 2018-04-28 | 2018-09-28 | 惠州市华星光电技术有限公司 | Driving voltage adjustment method and liquid crystal display |
| CN110136631A (en) * | 2019-06-25 | 2019-08-16 | 惠州市华星光电技术有限公司 | Display device shows the method for adjustment of picture |
| CN114694611A (en) * | 2022-01-10 | 2022-07-01 | 重庆翰博显示科技研发中心有限公司 | Novel liquid crystal residual image processing technology for Mini LED display screen |
| CN115547268A (en) * | 2021-06-30 | 2022-12-30 | 华显光电技术（惠州）有限公司 | Method and device for determining common voltage of liquid crystal display panel and computer equipment |
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| KR19980083731A (en) * | 1997-05-17 | 1998-12-05 | 구자홍 | LCD with afterimage removal function |
| US20050200793A1 (en) * | 2002-12-31 | 2005-09-15 | Lg.Philips Lcd Co. Ltd. | In-plane switching mode liquid crystal display device and method of fabricating the same |
| TW200917814A (en) * | 2007-10-12 | 2009-04-16 | Taiwan Tft Lcd Ass | Method and apparatus of measuring image-sticking of a display device |
| CN105654917A (en) * | 2016-04-08 | 2016-06-08 | 京东方科技集团股份有限公司 | Polarity reversal driving method, data driver and liquid crystal display panel |
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2017
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|---|---|---|---|---|
| KR19980083731A (en) * | 1997-05-17 | 1998-12-05 | 구자홍 | LCD with afterimage removal function |
| US20050200793A1 (en) * | 2002-12-31 | 2005-09-15 | Lg.Philips Lcd Co. Ltd. | In-plane switching mode liquid crystal display device and method of fabricating the same |
| TW200917814A (en) * | 2007-10-12 | 2009-04-16 | Taiwan Tft Lcd Ass | Method and apparatus of measuring image-sticking of a display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597428A (en) * | 2018-04-28 | 2018-09-28 | 惠州市华星光电技术有限公司 | Driving voltage adjustment method and liquid crystal display |
| CN110136631A (en) * | 2019-06-25 | 2019-08-16 | 惠州市华星光电技术有限公司 | Display device shows the method for adjustment of picture |
| CN115547268A (en) * | 2021-06-30 | 2022-12-30 | 华显光电技术（惠州）有限公司 | Method and device for determining common voltage of liquid crystal display panel and computer equipment |
| CN114694611A (en) * | 2022-01-10 | 2022-07-01 | 重庆翰博显示科技研发中心有限公司 | Novel liquid crystal residual image processing technology for Mini LED display screen |
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| Publication number | Publication date |
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| CN107331357B (en) | 2019-09-17 |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL China Star Optoelectronics 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. |
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