CN104849891B - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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Publication number
CN104849891B
CN104849891B CN201510275184.7A CN201510275184A CN104849891B CN 104849891 B CN104849891 B CN 104849891B CN 201510275184 A CN201510275184 A CN 201510275184A CN 104849891 B CN104849891 B CN 104849891B
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CN
China
Prior art keywords
liquid crystal
scan line
crystal display
transistor
data line
Prior art date
Application number
CN201510275184.7A
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Chinese (zh)
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CN104849891A (en
Inventor
钟德镇
郑会龙
Original Assignee
昆山龙腾光电有限公司
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Priority to CN201510275184.7A priority Critical patent/CN104849891B/en
Publication of CN104849891A publication Critical patent/CN104849891A/en
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Publication of CN104849891B publication Critical patent/CN104849891B/en

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    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306Circuit arrangements or driving methods for the control of single liquid crystal cells
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3611Control of matrices with row and column drivers

Abstract

The present invention provides a kind of liquid crystal display device, including liquid crystal display panel, the liquid crystal display panel includes gate driving circuit, source electrode drive circuit, the scan line that the n+1 item connecting with the gate driving circuit is arranged successively, the data line that the m item connecting with the source electrode drive circuit is arranged successively, m transistor, public electrode wire and the multiple pixel units intersected to form by the 1st article in the n+1 articles of scan line to nth scan line and the m data line, wherein, n and m is natural number and is more than or equal to 1, the control terminal of the m transistor is connected with (n+1)th scan line in the n+1 scan line, one path terminal of the m transistor is separately connected the m data line, another path terminal of the m transistor is all connected with the public electrode wire.Liquid crystal display device of the invention is not required to increase additional processing procedure i.e. using the charge and discharge voltage difference of charge sharing functionality reduction data line to reduce power consumption.

Description

Liquid crystal display device

Technical field

The present invention relates to field of liquid crystal display, in particular to a kind of liquid crystal display device using charge share function.

Background technique

Since liquid crystal display device has many advantages, such as frivolous, energy saving, radiationless, it is now widely used for TV, a In the electronic equipments such as people's computer, tablet computer, personal digital assistant (PDA), mobile phone, digital camera.Liquid crystal display device includes Liquid crystal display panel, and liquid crystal display panel generally includes gate driving circuit, source electrode drive circuit, multi-strip scanning line, a plurality of Data line and the multiple pixel units intersected to form by the multi-strip scanning line and multiple data lines.Multi-strip scanning line is connected to grid Pole driving circuit, gate driving circuit provide gate drive signal by multi-strip scanning line for multiple pixel units.A plurality of data Line is connected to source electrode drive circuit, and source electrode drive circuit provides display signal by multiple data lines for multiple pixel units.

The problem of causing direct current to remain in order to avoid the removable ion in the liquid crystal in liquid crystal display panel, need to be to each Voltage on the liquid crystal capacitance of a pixel unit makees polarity reversion, draws the display voltage for being supplied to pixel unit in two frame of front and back Polarity is opposite in face.The driving method of the polarity reversion more generally used at present includes frame reversion, row reversion, column inversion and point Reversion.Therefore, for same data line, the required voltage exported interlocks thereon for positive-negative polarity, and for each picture For the liquid crystal capacitance of plain unit, the power consumption of charge and discharge is 0.5*f*Clc*V*V, wherein f is the frequency of voltage charge and discharge Rate, V are the voltage of charge and discharge, that is, show that voltage, Clc are liquid crystal capacitance.In the liquid crystal display panel being driven reverse using polarity In, since source electrode drive circuit needs to carry out the reversal of primary display voltage in every frame refreshing, need to consume larger Power consumption.The especially liquid crystal display panel of dot inversion driving, the polarity in addition to carrying out primary display voltage in every frame refreshing Transformation, within each frame period, when every scan line is scanned by gate drive signal, source electrode drive circuit will make to correspond to each The voltage polarity reversal of display signal provided by the output channel of data line is primary, and therefore, required power consumption is bigger.

Referring to FIG. 1, Fig. 1 is a kind of electrical block diagram of source electrode drive circuit in the prior art.As shown in Figure 1, The source electrode drive circuit 10 includes the first output channel 11 and the second output channel 12, which includes the first number Mode converter 110, the first operational amplifier 112 and the first output end 114, second output channel 12 include the second digital-to-analogue conversion Device 120, second operational amplifier 122 and second output terminal 124.First output channel 11 and the second output channel 12 are respectively used to The first, second output signal Output1, Output2 is provided, first, second output signal Output1, Output2 is as aobvious Show that signal is respectively supplied to two adjacent data line (not shown) of liquid crystal display panel.It is each in the source electrode drive circuit 10 After driving load, that is to say, that when every scan line is scanned, which will show that signal provides respectively To after corresponding pixel unit and the first operational amplifier 112 export again with second operational amplifier 122 and shows signal Before, charge share control signal CSC control switch 13 is opened, so that the first, second output end 114,124 carries out charge point It enjoys.

The electricity of charge share function is had however, needing to arrange in pairs or groups using the source electrode drive circuit 10 of the charge share function Road, compatibility are poor.

Summary of the invention

The purpose of the present invention include a kind of liquid crystal display device is provided, with solve liquid crystal display device in the prior art by In the source electrode drive circuit using electrically charged sharing functionality leads to poor compatibility the problem of.

Specifically, the embodiment of the present invention provides a kind of liquid crystal display device, including liquid crystal display panel, the liquid crystal display Panel includes the scanning that gate driving circuit, source electrode drive circuit, the n+1 item connecting with the gate driving circuit are arranged successively Data line that line, the m item connecting with the source electrode drive circuit are arranged successively, m transistor, public electrode wire and by the n+1 The 1st article of multiple pixel units intersected to form to nth scan line and the m data line in article scan line, wherein n and m are equal For natural number and more than or equal to 1, the control terminal of the m transistor is connected with (n+1)th scan line in the n+1 scan line It connects, a path terminal of the m transistor is separately connected the m data line, and another path terminal of the m transistor is all connected with the public affairs Common-battery polar curve.

Preferably, which is thin film transistor (TFT).

Preferably, which forms in same processing procedure with the transistor switch in multiple pixel unit.

Preferably, each frame of the liquid crystal display device includes display time interval and blank interval, in the display time interval, the grid Pole driving circuit is followed successively by the 1st article to nth scan line offer gate drive signal to realize display;In the blank interval, The gate driving circuit provides gate drive signal for (n+1)th scan line to start charge share function.

Preferably, in the blank interval of each frame, which, which stops providing, displays signal to the m data Line.

Preferably, which starts, and opens the m transistor, by the charge share on the m data line Onto the public electrode wire.

Preferably, the charge polarity on adjacent odd number position datawire and even number position datawire is on the contrary, pass through the charge point Function is enjoyed to neutralize the odd number position datawire and the charge on the even number position datawire.

Preferably, which further comprises a sequential control circuit, the sequential control circuit and the grid Driving circuit is connected with the source electrode drive circuit.

Preferably, the sequential control circuit to the gate driving circuit provide an enabling signal, the gate driving circuit according to It is secondary to provide gate drive signal for the n+1 scan line.

Preferably, which provides an enabling signal to the gate driving circuit, and the gate driving circuit is first A gate drive signal is provided to start charge share function to (n+1)th scan line, and is supplied to this (n+1)th scanning Enabling signal of the gate drive signal of line as the 1st article of scan line makes the gate driving circuit successively to the 1st article to N scan line provides gate drive signal to realize display.

Liquid crystal display device provided by the embodiment of the present invention is divided the charge in data line by the m transistor It enjoys on public electrode wire, neutralizes the opposed polarity charge on the adjacent data line, to be reduced in polarity reversion Charge and discharge voltage span on the data line, reduces the waste of charge, to reduce the power consumption of entire liquid crystal display device, and the liquid Crystal device does not need the circuit that source electrode drive circuit collocation has charge share function, is not required to increase additional process, charge Sharing function only leans on panel itself can be completed, and does not influence the compatibility of source electrode drive circuit.

The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention, And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.

Detailed description of the invention

Fig. 1 is a kind of electrical block diagram of source electrode drive circuit in the prior art.

Fig. 2 is a kind of electrical block diagram of liquid crystal display device provided by first embodiment of the invention.

Fig. 3 is the waveform diagram of the part signal of liquid crystal display device shown in Fig. 2.

Fig. 4 is a kind of electrical block diagram of liquid crystal display device provided by second embodiment of the invention.

Specific embodiment

It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with Attached drawing and preferred embodiment, to liquid crystal display device proposed according to the present invention its specific embodiment, method, step, structure, Feature and effect, detailed description is as follows.

For the present invention aforementioned and other technology contents, feature and effect refer to the preferable reality of schema in following cooperation Applying in the detailed description of example to be clearly presented.It is predetermined when that can reach to the present invention by the explanation of specific embodiment The technical means and efficacy that purpose is taken be able to more deeply and it is specific understand, however institute's accompanying drawings be only to provide with reference to Purposes of discussion is not intended to limit the present invention.

Referring to FIG. 2, Fig. 2 is a kind of circuit structure signal of liquid crystal display device provided by first embodiment of the invention Figure.As shown in Fig. 2, liquid crystal display device 20 includes liquid crystal display panel 21 and sequential control circuit 22.Liquid crystal display panel 21 Including gate driving circuit 210, source electrode drive circuit 211, n+1 scan line G1, G2 ... Gn+1, m data line D1, D2 ... Dm, m transistors 214, public electrode wire Vcom and by n scan line G1~Gn and m in n+1 scan line Multiple pixel units 215 that data line D1~Dm is intersected to form, wherein n and m is natural number and is more than or equal to 1, each picture Plain unit 215 includes a transistor switch 216, liquid crystal capacitance Clc and storage capacitance Cst.

N+1 scan line G1, G2 ... Gn+1 is parallel to each other and is arranged successively, m data line D1, D2 ... Dm is mutual In parallel and it is arranged successively.M data line D1, D2 ... Dm passes through m transistor 214 respectively and is connected with public electrode wire Vcom It connects, the control terminal (not indicating) of m transistor 214 is connected with (n+1)th scan line Gn+1, and the one of m transistor 214 is logical Terminal (not indicating) be separately connected m data line D1, D2 ... another path terminals (not indicating) of Dm, m transistors 214 is equal Connect public electrode wire Vcom.

Transistor 214 can be thin film transistor (TFT), and can be with the transistor switch 216 in pixel unit 215 in same system It is formed in journey.

Sequential control circuit 22 connects gate driving circuit 210 and source electrode drive circuit 211 respectively to gate driving electricity Road 210 and source electrode drive circuit 211 provide various timing control signals.N+1 scan line G1, G2 ... Gn+1 is connected to grid Pole driving circuit 210, gate driving circuit 210 are followed successively by after the enabling signal for receiving the offer of sequential control circuit 22 N+1 scan line G1, G2 ... Gn+1 provides gate drive signal.M data line D1, D2 ... Dm is connected to source drive Circuit 211, source electrode drive circuit 211 are that multiple pixel units 215 provide display signal by m data line 213.

In the present embodiment, each frame of liquid crystal display device 20 includes display time interval and blank interval, in each frame Display time interval, gate driving circuit 210 successively provide gate drive signal to n scan line G1~Gn, n scan line G1~ When each scan line in Gn is scanned, the offer of source electrode drive circuit 211 display signal to m data line D1, D2 ... Dm, wherein polarity of voltage per the display signal on adjacent an odd number position datawire and an even number position datawire on the contrary, so that Adjacent pixel unit 215 it is received display signal polarity of voltage on the contrary, and among two adjacent frames, source drive Circuit 211 by m data line D1, D2 ... Dm be supplied to identical pixel unit 215 display signal polarity of voltage On the contrary, the polarity reversion to realize display signal.And in the blank interval of each frame, source electrode drive circuit 211 stops providing Display signal to m data line D1, D2 ... Dm, gate driving circuit 210 then provide gate drive signal and sweep to (n+1)th Line Gn+1 is retouched, to start charge share function.

Referring to FIG. 3, Fig. 3 is the waveform diagram of the part signal of liquid crystal display device 20.Assuming that two adjacent pictures Plain unit 215 received from an odd number position datawire and an even number position datawire respectively display signal voltage be respectively+ 5V and -5V, as shown in figure 3, in each frame, two received polarity of voltages for showing signal of the institute of pixel unit 215 are on the contrary, simultaneously And in consecutive frame, each pixel unit 215 it is received display signal polarity of voltage it is opposite.At the t1 moment, blank interval Starting, the starting of charge share function, gate driving circuit 210 provides gate drive signal to (n+1)th scan line Gn+1 at this time, Open m transistor 214, by the charge share to public electrode wire Vcom on m data line 213, due to adjacent surprise Charge polarity on digit data line and even number position datawire is on the contrary, therefore, on odd number position datawire and even number position datawire Charge is neutralized.In embodiments of the present invention, originally voltage be respectively+5V and -5V odd number position datawire and even number digit Become+3.7839V and -3.781V according to the voltage on line.At the t2 moment, blank interval terminates, odd number position datawire and even bit Polarity of voltage on data line is inverted, and becomes the voltage on odd number position datawire from+3.7839V when next frame starts For -5V, the voltage on even number position datawire is become into+5V from -3.781V, the voltage span of polarity reversion is subtracted by original 10V As low as 7.5649V reduces power consumption.Equally, when the blank interval of next frame starts, charge share function is again started up.

From the figure 3, it may be seen that liquid crystal display device 20 provided by the present embodiment is by increasing by one on liquid crystal display panel 21 Bar scan line Gn+1 and m transistor 214, make m data line D1~Dm pass through m transistor 214 respectively and are connected to common electrical Polar curve Vcom, in the blank interval of each frame, scan line Gn+1, which provides gate drive signal, opens m transistor 214, starting Charge share function makes the charge share of opposed polarity on the adjacent data line in m data line D1~Dm to public electrode wire On Vcom, to carry out charging neutrality, the voltage span on data line is reduced in polarity reversion, is existed to reduce data line Charge and discharge voltage difference in polarity reversion process thereby reduces the power consumption of entire liquid crystal display device 20.Therefore, it is not required in source electrode Separately collocation has the circuit of charge share function on driving circuit 211, and does not influence the compatibility of source electrode drive circuit 211.

Referring to FIG. 4, Fig. 4 is a kind of circuit structure signal of liquid crystal display device provided by second embodiment of the invention Figure.As shown in figure 4, liquid crystal display device 20 provided by liquid crystal display device 30 provided by the present embodiment and first embodiment It is similar, the difference is that, in the present embodiment, gate driving circuit 310 is receiving the one of the offer of sequential control circuit 32 Gate drive signal first is provided to start charge share function in blank interval to (n+1)th scan line Gn+1 after enabling signal Can, and the gate drive signal of (n+1)th article of scan line Gn+1 will be supplied to as the enabling signal of the 1st article of scan line G1, from And make gate driving circuit 310 display time interval be followed successively by n scan line G1, G2 ... Gn provide gate drive signal with reality Now show.

That is, in the present embodiment, liquid crystal display device 30 on startup, first starts charge share in blank interval Function is then shown in display time interval.

In conclusion liquid crystal display device provided by the embodiment of the present invention, by m transistor each frame sky The white period by m data line D1, D2 ... on the charge share to public electrode wire Vcom in Dm, make on adjacent data line Opposed polarity charge is neutralized, thus reduced in polarity reversion m data line D1, D2 ... charge and discharge voltage on Dm across Degree, reduces the waste of charge, to reduce the power consumption of entire liquid crystal display device.Further, the embodiment of the present invention is provided Liquid crystal display device do not need source electrode drive circuit collocation have charge share function circuit, be not required to increase additional process, Charge share function can be completed by the circuit of panel itself, and not influence the compatibility of source electrode drive circuit.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, any to be familiar with this profession Technical staff, it is without departing from the scope of the present invention, a little when being made using above-mentioned revealed technology contents Change or modification etc., any modification, equivalent replacement or improvement done within the spirit and principles of the present invention etc., should all wrap Containing within protection scope of the present invention.

Claims (7)

1. a kind of liquid crystal display device, including liquid crystal display panel, which is characterized in that the liquid crystal display panel includes gate driving The scan line and source drive electricity that circuit, source electrode drive circuit, the n+1 item connecting with the gate driving circuit are arranged successively The m articles of data line being arranged successively, m transistor, the public electrode wire and by the 1st article in the n+1 articles of scan line of road connection The multiple pixel units intersected to form to nth scan line and the m data line, wherein n and m is natural number and is greater than etc. In 1, the control terminal of the m transistor is connected with (n+1)th scan line in the n+1 scan line, the m transistor One path terminal is separately connected the m data line, and another path terminal of the m transistor is all connected with the public electrode wire;
Wherein, each frame of the liquid crystal display device includes display time interval and blank interval, in the display time interval, the gate driving Circuit is followed successively by the 1st article to nth scan line offer gate drive signal to realize display;In the blank interval, the grid Driving circuit provides gate drive signal for (n+1)th scan line to start charge share function to odd number position datawire and idol Charge on digit data line is neutralized;
The gate driving circuit is first successively in the display time interval after the enabling signal for receiving sequential control circuit offer Gate drive signal is provided to the 1st article to nth scan line, then gives (n+1)th scan line to provide grid in the blank interval Pole driving signal is opened with starting charge share function or the gate driving circuit in receive sequential control circuit offer one First give (n+1)th scan line offer gate drive signal to start charge share function in the blank interval after dynamic signal, Again using the gate drive signal for being supplied to (n+1)th article of scan line as the enabling signal of the 1st article of scan line, drive the grid Dynamic circuit successively gives the 1st article to provide gate drive signal to nth scan line in the display time interval.
2. liquid crystal display device according to claim 1, which is characterized in that the m transistor is thin film transistor (TFT).
3. liquid crystal display device according to claim 2, which is characterized in that the m transistor and multiple pixel unit In transistor switch formed in same processing procedure.
4. liquid crystal display device according to claim 1, which is characterized in that in the blank interval of each frame, the source electrode Driving circuit, which stops providing, displays signal to the m data line.
5. liquid crystal display device according to claim 1, which is characterized in that charge share function starting makes this m crystalline substance Body pipe is opened, will be on the charge share to the public electrode wire on the m data line.
6. liquid crystal display device according to claim 5, which is characterized in that adjacent odd number position datawire and even number digit According to the charge polarity on line on the contrary, by the charge share function to the electricity on the odd number position datawire and the even number position datawire Lotus is neutralized.
7. liquid crystal display device according to claim 1, which is characterized in that the sequential control circuit and gate driving electricity Road is connected with the source electrode drive circuit.
CN201510275184.7A 2015-05-26 2015-05-26 Liquid crystal display device CN104849891B (en)

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Publication number Priority date Publication date Assignee Title
CN105489182B (en) * 2016-01-05 2018-01-16 京东方科技集团股份有限公司 Display base plate and display device
CN105679266B (en) 2016-03-11 2018-11-23 京东方科技集团股份有限公司 Shutdown circuit, peripheral driver device and liquid crystal display panel
CN105761703B (en) * 2016-05-20 2018-05-25 京东方科技集团股份有限公司 Array substrate, display device and charge control method
CN105869600B (en) * 2016-06-12 2019-02-12 深圳市华星光电技术有限公司 Liquid crystal display and its driving circuit

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WO2010119113A1 (en) * 2009-04-15 2010-10-21 Store Electronic Systems Low power active matrix display
CN101872595A (en) * 2009-04-21 2010-10-27 瑞萨电子株式会社 The display device of driver and this driver of use
CN104392685A (en) * 2014-12-15 2015-03-04 合肥京东方光电科技有限公司 Array substrate, display panel and polarity reversal driving method

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CN101218623A (en) * 2005-07-14 2008-07-09 夏普株式会社 Active matrix type liquid crystal display device and its drive method
WO2010119113A1 (en) * 2009-04-15 2010-10-21 Store Electronic Systems Low power active matrix display
CN101872595A (en) * 2009-04-21 2010-10-27 瑞萨电子株式会社 The display device of driver and this driver of use
CN104392685A (en) * 2014-12-15 2015-03-04 合肥京东方光电科技有限公司 Array substrate, display panel and polarity reversal driving method

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Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou

Patentee after: Kunshan Longteng Au Optronics Co

Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou

Patentee before: Kunshan Longteng Optronics Co., Ltd.