CN105118468B - A kind of signal generating circuit for being used to eliminate liquid crystal image retention - Google Patents
A kind of signal generating circuit for being used to eliminate liquid crystal image retention Download PDFInfo
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- CN105118468B CN105118468B CN201510623017.7A CN201510623017A CN105118468B CN 105118468 B CN105118468 B CN 105118468B CN 201510623017 A CN201510623017 A CN 201510623017A CN 105118468 B CN105118468 B CN 105118468B
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Abstract
An embodiment of the present invention provides a kind of for eliminating the signal generating circuit of liquid crystal image retention, which is characterized in that including oscillating circuit, follows circuit and circuit for generating triangular wave；The input terminal of oscillating circuit receives external pulse signal, and for output terminal with the input terminal of circuit is followed to be electrically connected, the oscillator signal for oscillating circuit to be generated, which is sent to, follows circuit；The input terminal of circuit is followed to receive oscillator signal, output terminal is electrically connected with the input terminal of circuit for generating triangular wave, carries out buffering isolation to oscillator signal, and be sent to circuit for generating triangular wave；The input terminal of circuit for generating triangular wave receives the oscillator signal after buffering isolation, is exported after being converted into triangular signal by circuit for generating triangular wave.Circuit of the present invention generates the triangular signal synchronous with former DC pulse signal, being loaded onto shielded layer makes panel generate periodical electric field, effect of the driving electric field to negative ions is inhibited, reduces negative ions absorption in show electrode and the probability of public electrode, elimination liquid crystal image retention.
Description
Technical field
The present invention relates to technical field of liquid crystal display, specifically, are related to a kind of signal production for being used to eliminate liquid crystal image retention
Raw circuit.
Background technology
With the continuous development of LCD technology, liquid crystal display panel application is also more and more extensive.But due to liquid crystal
After showing that panel keeps a static picture for a long time on the screen, the liquid crystal in liquid crystal display panel due to being driven for a long time
It moves and is polarized, cause liquid crystal molecule that cannot normally be deflected under signal voltage control, even if liquid crystal display panel changes display
The content of picture, the trace of image, is known as image retention before still existing on screen.
Image retention producing cause is that the ion of parasitic capacitance and liquid crystal material in itself between liquid crystal display panel is special
Property.In the prior art, the reference voltage V deflected by using liquid crystal moleculecomReference voltage function, adjust VcomSize disappears
Except the difference of positive-negative polarity pixel voltage, and then play the role of inhibiting parasitic capacitance elimination image retention；And by liquid crystal material in itself
Caused image retention is primarily due to negative ions contained by liquid crystal material, these negative ions can adsorb under driving electric field effect
On show electrode and public electrode, internal direct current electric field is formed, causes image retention, the defect can not be solved in the prior art.
The content of the invention
For above deficiency, the present invention proposes a kind of signal generating circuit for being used to eliminate liquid crystal image retention, solves existing
Have in the liquid crystal display panel of technology, since negative ions are adsorbed on show electrode and public electrode in liquid crystal material, and then
The problem of image retention of generation.
A kind of signal generating circuit for being used to eliminate liquid crystal image retention including oscillating circuit, follows circuit and triangular wave to produce
Raw circuit；
Wherein, the input terminal of the oscillating circuit receives external pulse signal, output terminal and the input for following circuit
End electrical connection, the oscillator signal for oscillating circuit to be generated, which is sent to, described follows circuit；
The input terminal for following circuit receives the oscillator signal, the input of output terminal and the circuit for generating triangular wave
End electrical connection is concurrently sent for carrying out buffering isolation to the oscillator signal to circuit for generating triangular wave；
The input terminal of the circuit for generating triangular wave receives the oscillator signal after buffering isolation, after being converted into triangular signal
It is exported by the circuit for generating triangular wave.
Further, the oscillating circuit includes：First NAND gate, the first NOT gate, first resistor, second resistance, first
Diode, the second diode and the first capacitance；
Wherein, first NAND gate first input end receive external pulse signal, the second input terminal respectively with it is described
The cathode of first diode, the anode of the second diode, the source electrode of the first end of the first capacitance and the first field-effect tube are electrically connected
It connects；Input terminal of the output terminal respectively with the first end of the first resistor, the first end of second resistance and the first NOT gate is electrically connected
It connects；
The second end of the first resistor is electrically connected with the anode of first diode；
The second end of the second resistance is electrically connected with the cathode of second diode；
Second end and the input terminal that follows circuit of the output terminal of first NOT gate with first capacitance
Electrical connection, is used for transmission the oscillator signal.
Further, first diode and second diode are Schottky diode.
Further, further included the first field-effect tube, wherein the grid of first field-effect tube with described first with
The first input end electrical connection of NOT gate, source electrode and the cathode of first diode, the anode of the second diode, the first capacitance
First end be electrically connected, drain electrode be electrically connected.
Further, it is described that circuit is followed to include：Second capacitance, the first variable resistor, the first power supply, second source and
One operational amplifier；
Wherein, the oscillator signal that the output terminal of the first end reception oscillating circuit of second capacitance is sent, second
End is electrically connected with the first end of first variable resistor and the in-phase input end of first operational amplifier；
The second end of first variable resistor respectively with the anode of first power supply and first operational amplifier
First voltage control terminal electrical connection；3rd end of first variable resistor respectively with the cathode of the second source and described
The second voltage control terminal electrical connection of first operational amplifier；
The cathode of first power supply be electrically connected, the anode of the second source be electrically connected；
The reverse input end of first operational amplifier is electrically connected with the output terminal of the first operational amplifier, and with it is described
The input terminal electrical connection of circuit for generating triangular wave, the oscillator signal being used for transmission after buffering isolation.
Further, first power supply provides forward dc power supply, and the second source provides negative sense DC power supply.
Further, the circuit for generating triangular wave includes：3rd resistor and the 3rd capacitance；
Wherein, the first end of the 3rd resistor receive described in the output terminal of circuit is followed to send buffering isolate after shaking
Signal is swung, second end is electrically connected with the first end of the 3rd capacitance；
The second end of 3rd capacitance be electrically connected；
The second end of the 3rd resistor is the signal generating circuit output terminal, for the circuit for generating triangular wave
The triangular signal of generation is exported.
Further, the circuit for generating triangular wave is electrically connected with the shielded layer on color membrane substrates.
Further, first field-effect tube is P-channel enhancement type FET.
The embodiment of the present invention provides a kind of signal generating circuit for being used to eliminate liquid crystal image retention, and transmits a signal to color film
The shielded layer of substrate makes LCD display intralamellar part generate periodical electric field, so as to inhibit driving electric field to negative ions
Effect reduces negative ions and adsorbs in show electrode and the probability of public electrode, so as to achieve the effect that eliminate liquid crystal image retention.
Description of the drawings
Fig. 1 is a kind of signal generating circuit structural representation for being used to eliminate liquid crystal image retention that the embodiment of the present invention one provides
Figure.
Fig. 2 is a kind of signal generating circuit structural representation for being used to eliminate liquid crystal image retention provided by Embodiment 2 of the present invention
Figure.
Fig. 3 is a kind of signal generating circuit intermediate cam ripple production for being used to eliminate liquid crystal image retention provided by Embodiment 2 of the present invention
Raw circuit diagram.
Fig. 4 is that a kind of signal generating circuit output waveform for being used to eliminate liquid crystal image retention provided by Embodiment 2 of the present invention is shown
It is intended to.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than full content are illustrated only in description, attached drawing.
Embodiment one
Fig. 1 is a kind of signal generating circuit structural representation for being used to eliminate liquid crystal image retention that the embodiment of the present invention one provides
Figure.As shown in Figure 1, it is a kind of for eliminating the signal generating circuit of liquid crystal image retention, which is characterized in that including oscillating circuit 100, with
With circuit 200 and circuit for generating triangular wave 300；
Wherein, the input terminal of oscillating circuit 100 receives external pulse signal, output terminal and the input terminal for following circuit 200
Electrical connection, the oscillator signal for oscillating circuit 100 to be generated, which is sent to, follows circuit 200；
The input terminal of circuit 200 is followed to receive oscillator signal, the input terminal of output terminal and circuit for generating triangular wave 300 is electrically connected
It connects, is concurrently sent to circuit for generating triangular wave 300 for carrying out buffering isolation to oscillator signal；
The input terminal of circuit for generating triangular wave 300 receives the oscillator signal after buffering isolation, after being converted into triangular signal
It is exported by circuit for generating triangular wave 300.
It is worth noting that, the signal generating circuit in embodiment illustrated in fig. 1 can include pulse signal generator 400.
Pulse signal generator 400 is used to generate external pulse signal and is sent to oscillating circuit 100.
Oscillating circuit 100 receives the external pulse signal, periodically variable for the external pulse signal to be converted into
Oscillator signal.The cycle of the oscillator signal is related with the device parameters selection inside oscillating circuit 100.
Circuit 200 is followed to receive the periodically variable oscillator signal.One is formed using the internal element of circuit 200 is followed
A voltage follower, which can carry out isolation buffer to periodically variable oscillator signal, due to voltage follow
Input impedance outside device is high-impedance state, and output impedance is low resistance state, and cushioning effect can be played using voltage follower.
In the embodiment of the present invention, RC integrating circuit may be employed in circuit for generating triangular wave 300 therein, by changing the RC
The time constant of integrating circuit, so as to which the periodically variable oscillator signal inputted is converted into triangular signal.
It is provided in an embodiment of the present invention a kind of for eliminating the signal generating circuit of liquid crystal image retention, by by former external pulse
Signal is converted into triangular signal, and is loaded onto the shielded layer of color membrane substrates, and LCD display intralamellar part is made to generate periodically electricity
, so as to inhibit effect of the driving electric field to negative ions, negative ions absorption is reduced in show electrode and public electrode
Probability, so as to eliminate liquid crystal image retention.
Embodiment two
Fig. 2 is a kind of signal generating circuit structural representation for being used to eliminate liquid crystal image retention provided by Embodiment 2 of the present invention
Figure.As shown in Figure 2, the signal generating circuit include oscillating circuit 100, follow circuit 200, circuit for generating triangular wave 300 and
First field-effect tube 500.
Wherein, oscillating circuit 100 includes：First NAND gate 101, the first NOT gate 102, first resistor 103, second resistance
104th, the first diode 105, the second diode 106 and the first capacitance 107；
Wherein, the first input end of the first NAND gate 101 receives external pulse signal, and the second input terminal is respectively with the one or two
The cathode of pole pipe 105, the anode of the second diode 106, the source of the first end of the first capacitance 107 and the first field-effect tube 500
Pole is electrically connected；Output terminal respectively with the first end of first resistor 103, the first end of second resistance 104 and the first NOT gate 102
Input terminal is electrically connected；
The second end of first resistor 103 is electrically connected with the anode of the first diode 105；
The second end of second resistance 104 is electrically connected with the cathode of the second diode 106；
The output terminal of first NOT gate 102 and the first capacitance 107 second end and the input terminal of circuit 200 is followed to be electrically connected
It connects, is used for transmission oscillator signal.
First diode 105 and the second diode 106 are Schottky diode.
The grid of first field-effect tube 500 is electrically connected with the first input end of the first NAND gate 101, source electrode and described first
The cathode of diode 105, the anode of the second diode 106, the first capacitance 107 first end electrical connection, drain electrode be electrically connected.
It should be noted that the external pulse signal for being loaded into the first input end of the first NAND gate 101 is DC pulse
Signal.And the first diode 105 can be obtained compared with general-purpose diode more with the second diode 106 using Schottky diode
Small threshold voltage, so that the reaction of oscillating circuit 100 is more sensitive.
When oscillating circuit 100 is in original operating state, the first end of the first capacitance 107 is in low level.And then nothing
It is which kind of state by DC pulse signal input, the low level signal after the first NAND gate 101 by translating into high level
Signal；
The first end that the first capacitance 107 is loaded by 103 and first diode 106 of first resistor of high level signal.
In addition, the high level signal is after the first NOT gate 102 also by exporting as low level signal, and it is loaded into the of the first capacitance 107
Two ends, i.e., the oscillator signal that oscillating circuit 100 exports at this time is low level.
When the voltage value of the first end of the first capacitance 107 reaches the input threshold value high level of the first NAND gate 101, first
The output terminal of NAND gate 101 translates into low level, and low level signal is loaded by 104 and second diode 106 of second resistance
To the first end of the first capacitance 107, and this low level signal is high level by being exported after the first NOT gate 102, i.e., shakes at this time
The oscillator signal for swinging the output of circuit 100 is high level.Therefore, oscillating circuit 100 generates the oscillator signal at low and high level interval.
Among the process of vibration, by using first resistor 103, the first diode 105 and second resistance 104 and second
The structure of diode 106, by first with non-101 output signal loading to the first capacitance 107 first end；By using such
Connection mode can control the equilibrium state of 107 both ends level conversion of the first capacitance.I.e. by changing first resistor 103, first
Diode 105, the parameter of 104 and second diode 106 of second resistance and then change are loaded into the voltage at 107 both ends of the first capacitance
Be worth and then change the charge and discharge time, so as to change the duration of low and high level, realize change the frequency of oscillation of oscillator signal with
Phase.
It is noted that the first field-effect tube 500 can be P-channel enhancement type FET.And the field-effect tube
Turn-on condition for source voltage be more than grid voltage.And then when the work of oscillating circuit 100 terminates, DC pulse signal is low electricity
Usually, if the first end of the first capacitance 107 is high level at this time, the first field-effect tube 500 is in the conduction state and makes vibration
Circuit recovers to original state.
Further, circuit 200 is followed to include：Second capacitance 201, the first variable resistor 202, the first power supply 203, second
204 and first operational amplifier 205 of power supply；
Wherein, the first end of the second capacitance 201 receives the oscillator signal that the output terminal of oscillating circuit 100 is sent, second end
It is electrically connected with the first end of the first variable resistor 202 and the in-phase input end of the first operational amplifier 205；
The second end of first variable resistor 202 respectively with the anode of the first power supply 203 and the first operational amplifier 205
One voltage controling end is electrically connected；It is put respectively with the cathode of second source 204 and the first computing at 3rd end of the first variable resistor 202
The second voltage control terminal electrical connection of big device 205；
It is worth noting that, the first end of the first variable resistor 202 is the sliding contact point of the first variable resistor 202, the
Two ends and the 3rd end are respectively maximum virtual value terminal.
The cathode of first power supply 203 be electrically connected, the anode of second source 204 be electrically connected；
The reverse input end of first operational amplifier 205 is electrically connected with the output terminal of the first operational amplifier 205, and with three
The input terminal electrical connection of angle wave generation circuit 300, the oscillator signal being used for transmission after buffering isolation.
First power supply 203 provides forward dc power supply, and second source 204 provides negative sense DC power supply.Wherein, the first power supply
The 203 DC voltage voltages provided are the maximum voltage loaded on liquid crystal display panel show electrode, and second source 204 provides
Direct current power source voltage be the minimum voltage that loads on liquid crystal display panel show electrode.
Specifically, the oscillator signal that oscillating circuit 100 is sent in the present embodiment is square wave oscillation signal.
Circuit 200 is followed when square wave oscillation signal is linked by the second capacitance 201, first passes through the second capacitance 201
The DC component adulterated in filtering square wave oscillation signal, and then inputted by the first variable resistor 202 to the first operational amplifier
205 in-phase input end.
It is noted that the first end of the first variable resistor 202 is electrically connected with the second end of the second capacitance 201, second
End and cathode of the 3rd end respectively with the anode of the first power supply 203, second source 204 are electrically connected, can power transformation to adjust first
202 access of resistance follows the resistance value in circuit 200.
The reverse input end of first operational amplifier 205 is electrically connected with output terminal, to form a voltage follower.Electricity
Pressure follower refer to that output voltage is identical with input voltage, therefore the voltage amplification factor of voltage follower less than 1 or close to
1。
Voltage follower mainly plays buffering, isolation, improves load capacity.Since the first operational amplifier 205 is defeated
Enter impedance to be the first variable resistor 202 and be high-impedance state, output impedance is the resistance in circuit for generating triangular wave 300 and is low
Resistance state, therefore circuit before and after isolating can be played the role of by the first operational amplifier 205.Square wave oscillation signal is added to
The in-phase input end of first operational amplifier 205 after isolating by buffering, is exported to circuit for generating triangular wave.
It is noted that the first operational amplifier 205 includes first voltage control terminal and second voltage control terminal.When
First voltage control terminal loads positive voltage, and when second voltage control terminal loads negative voltage, the first operational amplifier can use.
Further, circuit for generating triangular wave 300 includes：301 and the 3rd capacitance 302 of 3rd resistor；
Wherein, the first end reception of 3rd resistor 301 follows the vibration after the buffering isolation that the output terminal of circuit 200 is sent
Signal, second end are electrically connected with the first end of the 3rd capacitance 302；
The second end of 3rd capacitance 302 be electrically connected；
The second end of 3rd resistor 301 is signal generating circuit output terminal, for what is generated to circuit for generating triangular wave 300
Triangular signal is exported.
When the RC circuits that the square wave oscillation signal after isolation is made up of 301 and the 3rd capacitance 302 of 3rd resistor, meeting
Transform into triangular signal.
Fig. 3 is a kind of signal generating circuit intermediate cam ripple production for being used to eliminate liquid crystal image retention provided by Embodiment 2 of the present invention
Raw circuit diagram.
As shown in figure 3, circuit for generating triangular wave 300 is as follows to the conversion process of signal：
If the voltage value of the square wave oscillation signal after isolation is Vi, the output voltage values of circuit for generating triangular wave 300 are VO。
Then have：Wherein R be 3rd resistor 301 resistance value, icFor the current value of circuit, VOIt is also the 3rd capacitance 302 simultaneously
The voltage value at both ends.ByIt can obtain：
It can be obtained by calculating
It can be obtained by above-mentioned formula, output voltage values VOHave with the parameter of 301 and the 3rd capacitance 302 of 3rd resistor
It closes, and changes over time.
Fig. 4 is that a kind of signal generating circuit output waveform for being used to eliminate liquid crystal image retention provided by Embodiment 2 of the present invention is shown
It is intended to.
As shown in Figure 4, S1 is DC pulse signal, and S2 is triangular signal.Figure 4, it is seen that DC pulse is believed
A downward pulse signal can be generated in interval number at the same time, therefore can regard DC pulse signal as the cycle
The pulse signal of property.Circuit for generating triangular wave generates 300 output voltage values VOOscillogram be nonstandard triangular signal.
Also, the triangular signal of output is synchronizing signal with DC pulse signal, whenever DC pulse signal generates downward pulse
When, triangular signal is in the latter end of the signal period.
In addition, circuit for generating triangular wave 300 is electrically connected with the shielded layer on color membrane substrates.Circuit for generating triangular wave 300 is defeated
The triangular signal gone out is loaded into the shielded layer on color membrane substrates, can generate corresponding periodically electricity in LCD display intralamellar part
, the cycle of the periodicity electric field and the cycle synchronisation of triangular signal.
The embodiment of the present invention is a kind of for eliminating the signal generating circuit of liquid crystal image retention by providing, and is allowed to generate and original
The triangular signal of DC pulse signal synchronization, and the shielded layer on color membrane substrates is loaded into, make shielded layer in panel
Portion generates corresponding periodical electric field, reduces negative ions and adsorbs in show electrode and the probability of public electrode, so as to fulfill
Eliminate the function of liquid crystal image retention.
It is worth noting that, the above is only the preferred embodiment of the present invention, it is noted that for the art
Those of ordinary skill for, the equivalent variations made on the premise of the design of the principle of the invention and principle is not departed from, modification
With combination, it is within the scope of protection of the invention.
Claims (8)
- It is 1. a kind of for eliminating the signal generating circuit of liquid crystal image retention, which is characterized in that including oscillating circuit, follow circuit and Circuit for generating triangular wave；Wherein, the input terminal of the oscillating circuit receives external pulse signal, output terminal and the input terminal electricity for following circuit Connection, the oscillator signal for oscillating circuit to be generated, which is sent to, described follows circuit；The oscillating circuit includes：First NAND gate, the first NOT gate, first resistor, second resistance, the first diode, the two or two Pole pipe and the first capacitance；Wherein, the first input end of first NAND gate receives external pulse signal, and the second input terminal is respectively with described first The source electrode electrical connection of the cathode of diode, the anode of the second diode, the first end of the first capacitance and the first field-effect tube；It is defeated Input terminal of the outlet respectively with the first end of the first resistor, the first end of second resistance and the first NOT gate is electrically connected；The second end of the first resistor is electrically connected with the anode of first diode；The second end of the second resistance is electrically connected with the cathode of second diode；The output terminal of first NOT gate is electrically connected with the second end of first capacitance and the input terminal for following circuit It connects, is used for transmission the oscillator signal；The input terminal for following circuit receives the oscillator signal, the input terminal electricity of output terminal and the circuit for generating triangular wave Connection, for carrying out buffering isolation to the oscillator signal, and is sent to the circuit for generating triangular wave；The input terminal of the circuit for generating triangular wave receives the oscillator signal after buffering isolation, after being converted into triangular signal Output.
- 2. the signal generating circuit according to claim 1 for being used to eliminate liquid crystal image retention, which is characterized in that the described 1st Pole pipe and second diode are Schottky diode.
- It is 3. according to claim 1 for eliminating the signal generating circuit of liquid crystal image retention, which is characterized in that have further included the One field-effect tube, wherein the grid of first field-effect tube is electrically connected with the first input end of first NAND gate, source electrode Be electrically connected with the first end of the cathode of first diode, the anode of the second diode, the first capacitance, drain electrode be electrically connected It connects.
- 4. the signal generating circuit according to claim 1 for being used to eliminate liquid crystal image retention, which is characterized in that described to follow electricity Road includes：Second capacitance, the first variable resistor, the first power supply, second source and the first operational amplifier；Wherein, the first end of second capacitance receives the oscillator signal that the output terminal of the oscillating circuit is sent, second end with The in-phase input end of the first end of first variable resistor and first operational amplifier is electrically connected；The second end of first variable resistor respectively with the anode of first power supply and first operational amplifier One voltage controling end is electrically connected；3rd end of first variable resistor respectively with the cathode of the second source and described first The second voltage control terminal electrical connection of operational amplifier；The cathode of first power supply be electrically connected, the anode of the second source be electrically connected；The reverse input end of first operational amplifier is electrically connected with the output terminal of the first operational amplifier, and with the triangle The input terminal electrical connection of wave generation circuit, the oscillator signal being used for transmission after buffering isolation.
- 5. the signal generating circuit according to claim 4 for being used to eliminate liquid crystal image retention, which is characterized in that first electricity Source provides forward dc power supply, and the second source provides negative sense DC power supply.
- 6. the signal generating circuit according to claim 1 for being used to eliminate liquid crystal image retention, which is characterized in that the triangular wave Generation circuit includes：3rd resistor and the 3rd capacitance；Wherein, the vibration after the buffering for described in the first end reception of the 3rd resistor output terminal of circuit being followed to send is isolated is believed Number, second end is electrically connected with the first end of the 3rd capacitance；The second end of 3rd capacitance be electrically connected；The second end of the 3rd resistor is the signal generating circuit output terminal, for being generated to the circuit for generating triangular wave Triangular signal exported.
- 7. the signal generating circuit according to claim 6 for being used to eliminate liquid crystal image retention, which is characterized in that the triangular wave Generation circuit is electrically connected with the shielded layer on color membrane substrates.
- 8. the signal generating circuit according to claim 3 for being used to eliminate liquid crystal image retention, which is characterized in that described first Effect pipe is P-channel enhancement type FET.
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| CN201510623017.7A CN105118468B (en) | 2015-09-25 | 2015-09-25 | A kind of signal generating circuit for being used to eliminate liquid crystal image retention |
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| US10514562B2 (en) | 2018-01-15 | 2019-12-24 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Amplifier for LCD and LCD |
| CN108172190A (en) * | 2018-01-15 | 2018-06-15 | 深圳市华星光电技术有限公司 | For the amplifying circuit of liquid crystal display |
| CN111968568A (en) | 2020-09-03 | 2020-11-20 | 上海天马微电子有限公司 | Light-emitting panel and display device |
| CN115356539A (en) * | 2022-08-12 | 2022-11-18 | 北京津发科技股份有限公司 | EEG impedance test circuit, method and device |
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| JP4073514B2 (en) * | 1997-02-27 | 2008-04-09 | シチズンホールディングス株式会社 | Liquid crystal display |
| JP5151266B2 (en) * | 2007-06-20 | 2013-02-27 | 株式会社リコー | Switching regulator and switching regulator operation control method |
| CN102034439B (en) * | 2009-09-28 | 2013-06-05 | 北京京东方光电科技有限公司 | Liquid crystal display driving device |
| CN202281886U (en) * | 2011-11-11 | 2012-06-20 | 京东方科技集团股份有限公司 | Liquid crystal display panel and liquid crystal display device |
| CN204558001U (en) * | 2015-04-16 | 2015-08-12 | 昆山龙腾光电有限公司 | Power-off ghost shadow eliminates circuit and gate driver circuit |
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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. |