CN103544927B - Display drive circuit, display device and display drive method - Google Patents
Display drive circuit, display device and display drive method Download PDFInfo
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- CN103544927B CN103544927B CN201310552066.7A CN201310552066A CN103544927B CN 103544927 B CN103544927 B CN 103544927B CN 201310552066 A CN201310552066 A CN 201310552066A CN 103544927 B CN103544927 B CN 103544927B
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Abstract
The invention discloses a display drive circuit, a display device and a display drive method, and aims to improve the display quality of images. The display drive circuit comprises a grid electrode driver, a source electrode driver, a time schedule controller and a voltage compensation circuit. The time schedule controller is connected with the source electrode driver, the grid electrode driver and the voltage compensation circuit. The output end of the voltage compensation circuit is connected with the access end of a gray scale voltage generating circuit in the source electrode driver. When the grid electrode driver controls a TFT to be in a closed state, the time schedule controller controls gray scales output by the voltage compensation circuit to the source electrode driver, so that voltage losses of pixel electrodes at the closed moment of the TFT can be compensated, and the display quality of the images is improved.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of display driver circuit, display device and display drive method.
Background technology
Along with TFT-LCD(Thin Film Transistor-Liquid Crystal Display, thin-film transistor LCD device) development of technology, the application of thin-film transistor LCD device is more and more extensive.
Existing thin-film transistor LCD device, because TFT exists feedthrough (Feed Through) effect, when TFT grid is closed moment, the current potential that TFT can be made to drain is compared TFT source potential and is suddenly reduced, the potential difference (PD) of this reduction is called feed-trough voltage, as shown in Figure 1, when the moment of TFT grid voltage Vg output low level, can make TFT drain voltage (pixel electrode voltage) Vd comparatively TFT source voltage Vs suddenly reduce, reduce potential difference (PD) Δ Vp and be feed-trough voltage.Due to the existence of feed-trough voltage, the current potential that TFT is drained reduces, the current potential of the pixel electrode that this TFT drain electrode connects also decreases, make voltage difference between the voltage of pixel electrode and the voltage of public electrode lower than the pixel voltage preset, and then affect the deflection of liquid crystal molecule, and affect light transmission rate and the brightness of liquid crystal indicator, make liquid crystal indicator occur scintillation, affect picture display quality.
Summary of the invention
The object of this invention is to provide a kind of display driver circuit, display device and display drive method, to avoid liquid crystal indicator to occur scintillation, improve picture display quality.
The object of the invention is to be achieved through the following technical solutions:
One aspect of the present invention provides a kind of display driver circuit, comprise the gate drivers for controlling thin film transistor (TFT) TFT unlatching or closedown and the source electrode driver for exporting gray scale voltage to described TFT source electrode, also comprise time schedule controller and voltage compensating circuit, wherein
Described time schedule controller is connected respectively with described source electrode driver, described gate drivers and described voltage compensating circuit;
The output terminal of described voltage compensating circuit is connected with the gray scale voltage generation circuit incoming end in described source electrode driver;
Described gate drivers control described TFT be in closed condition time, described time schedule controller controls described voltage compensating circuit and compensates the gray scale voltage that source electrode driver exports, and exports the gray scale voltage after compensation to TFT source electrode by described source electrode driver.
In the embodiment of the present invention, display driver circuit comprises voltage compensating circuit, this voltage compensating circuit is when gate drivers control TFT is in closed condition, the gray scale voltage that source electrode driver exports is compensated, therefore, it is possible to compensate the loss of voltage of TFT turn-off transient pixel electrode, make the pixel voltage between pixel electrode with public electrode identical before and after TFT closes, and then guarantee that display device has substantially identical light percent of pass and brightness, improve picture display quality.
Preferably, described voltage compensating circuit comprises power circuit and totalizer, wherein,
The input end of described power circuit is connected with described time schedule controller, and output terminal is connected with the first incoming end of described totalizer;
Described totalizer second incoming end is connected with the gamma reference circuit output terminal producing gamma reference voltage;
The output terminal of described totalizer is connected with the incoming end of gray scale voltage generation circuit.
In the embodiment of the present invention, by the power circuit of totalizer and output bucking voltage, gamma reference voltage is compensated, and then the gray scale voltage that can obtain after corresponding compensation, utilize this voltage compensating circuit, the source drive voltage that can easier realize inputing to thin film transistor (TFT) TFT compensates.
Further, in the embodiment of the present invention, the output terminal quantity of power circuit is equal with the incoming end quantity of described gray scale voltage generation circuit, to compensate each gamma reference voltage respectively, simplifies compensating operation.
Further, in the embodiment of the present invention, the quantity of totalizer is identical with the incoming end quantity of described gray scale voltage generation circuit, to simplify the sequential operation compensated gray scale voltage.
Preferably, in the embodiment of the present invention, voltage compensating circuit also comprises a voltage adjuster, and wherein, described voltage adjuster exports different bucking voltages for adjusting described power circuit, to adapt to the different bucking voltage of different display device demands.
Further, in the embodiment of the present invention, the totalizer of voltage compensating circuit is arranged at the inside of described source electrode driver, simplifies circuit design.
On the other hand, provide a kind of display device, comprise display panel, the viewing area of described display panel comprises pixel cell, and each described pixel cell comprises thin film transistor (TFT) TFT, also comprises above-mentioned display driver circuit in the present invention.
Adopt the display device that the embodiment of the present invention provides, pixel voltage required by the potential difference that can effectively control between pixel electrode and public electrode maintains, and and then guarantee TFT close before and after, this display device has substantially identical light percent of pass and brightness, effectively avoid feedthrough effect on the impact of the potential difference (PD) between pixel electrode and public electrode, thus improve picture display quality.
Further aspect of the present invention, additionally provides a kind of display drive method of display driver circuit, comprising:
Time sequence controller grid driver exports scanning voltage, and when making thin film transistor (TFT) TFT be in opening, control voltage compensating circuit does not compensate the gray scale voltage that source electrode driver exports;
Time sequence controller grid driver does not export scanning voltage, and when making thin film transistor (TFT) TFT be in closed condition, control voltage compensating circuit exports bucking voltage, compensates the gray scale voltage that source electrode driver exports.
In the embodiment of the present invention, voltage compensating circuit comprises power circuit and totalizer, the gray scale voltage that source electrode driver exports is compensated when TFT is in closed condition by time schedule controller control voltage compensating circuit, therefore, the loss of voltage of TFT turn-off transient pixel electrode can be compensated, make the pixel voltage between pixel electrode with public electrode identical before and after TFT closes, and then guarantee that display device has substantially identical light percent of pass and brightness, improve picture display quality.
Further, power circuit export bucking voltage be with TFT feed-trough voltage for benchmark and have setting threshold range voltage, to reduce the requirement of threshold voltage precision.
Accompanying drawing explanation
Fig. 1 is the oscillogram of display driver circuit each signal in the process of carrying out display driver in prior art;
The display driver circuit structural representation that Fig. 2 provides for the embodiment of the present invention;
The another display driver circuit structural representation that Fig. 3 provides for the embodiment of the present invention;
The oscillogram of a kind of display driver circuit each signal in the process of carrying out display driver that Fig. 4 provides for the embodiment of the present invention;
The schematic flow sheet of the display drive method that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, is not whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Thin-film transistor LCD device comprises time schedule controller, gamma reference circuit, source electrode driver, gate drivers, backlight unit and display panel etc., gamma reference circuit produces multiple gamma reference voltage, source electrode driver comprises the gray scale voltage generation circuit be made up of the divider resistance of multiple series connection, each gamma reference voltage that gamma reference circuit produces, access the diverse location of gray scale voltage generation circuit respectively, different gray scale voltages is exported after divider resistance dividing potential drop, source electrode driver exports the source drive voltage of this gray scale voltage as thin film transistor (TFT) TFT, carry out picture display.
The embodiment of the present invention provides a kind of display driver circuit of Thin Film Transistor-LCD, this display driver circuit comprises the gate drivers 1 opened for control TFT or close, for exporting the source electrode driver 2 of gray scale voltage to the source electrode of TFT, also comprise: the voltage compensating circuit 4 that time schedule controller 3 and the gray scale voltage for exporting source electrode driver 2 compensate, as shown in Figure 2, time schedule controller 3 and gate drivers 1, source electrode driver 2 is connected respectively with voltage compensating circuit 4, the output terminal of voltage compensating circuit 4 is connected with the gray scale voltage generation circuit incoming end (not indicating in figure) in source electrode driver, when gate drivers 1 control TFT is in closed condition, the gray scale voltage that time schedule controller 3 control voltage compensating circuit 4 pairs of source electrode drivers 2 export compensates, and export the gray scale voltage after compensation to TFT source electrode by source electrode driver 2, source drive voltage is compensated, when making up TFT closedown, the defect causing the voltage difference between the voltage of pixel electrode and the voltage of public electrode lower than the pixel voltage preset falls in TFT drain potential suddenly.
In the embodiment of the present invention, voltage compensating circuit 4 preferably includes power circuit 5 and totalizer 6, power circuit 5 exports bucking voltage, totalizer 6 utilizes this bucking voltage to compensate gray scale voltage, certainly do not regard it as and be limited, in the embodiment of the present invention, voltage compensating circuit 4 can also be other circuit form that can realize compensating gray scale voltage.
Concrete, as shown in Figure 3, in the embodiment of the present invention, the incoming end of power circuit 5 is connected with time schedule controller 3, output terminal is connected with the first incoming end of totalizer 6, another incoming end (the second incoming end) that totalizer 6 is not connected with power circuit 5 output terminal is connected with gamma reference circuit 7 output terminal producing gamma reference voltage, the output terminal of totalizer 6 is connected with the incoming end of gray scale voltage generation circuit (not indicating in figure), namely the gamma reference voltage exported by bucking voltage and the gamma reference circuit 7 of totalizer 6 pairs of power circuits 5 outputs carries out additive operation, gamma reference voltage is compensated, namely gray scale voltage is compensated.
Further, multiple gamma reference voltage can be exported due to gamma reference circuit and access the incoming end of gray scale voltage generation circuit, therefore, in the embodiment of the present invention, the output terminal of power circuit 5 is set to multiple, and the quantity of this output terminal is equal with the incoming end quantity of gray scale voltage generation circuit, to compensate each gamma reference voltage respectively, simplify compensating operation.
Further, the incoming end quantity that the quantity of totalizer can be set to access with gray scale voltage generation circuit gamma reference voltage in the embodiment of the present invention is equal, addition is carried out respectively to each gamma reference voltage and compensates the gray scale voltage after obtaining corresponding compensation, to simplify the sequential operation compensated gray scale voltage.
Further, in the embodiment of the present invention, voltage compensating circuit also comprises a voltage adjuster, exports different bucking voltages, to adapt to the different bucking voltage of different display device demands by this voltage adjuster adjustment power circuit.
By the power circuit of totalizer and output bucking voltage, gamma reference voltage is compensated in the embodiment of the present invention, and then the gray scale voltage that can obtain after corresponding compensation, utilize this voltage compensating circuit, the source drive voltage that can easier realize inputing to thin film transistor (TFT) TFT compensates.
The above-mentioned voltage compensating circuit related to of embodiment of the present invention application, the display driver circuit provided, as shown in Figure 3, time schedule controller 3 and gate drivers 1, the power circuit 5 of source electrode driver 2 and voltage compensating circuit is connected, state residing for TFT, the power circuit 5 of time schedule controller 3 control voltage compensating circuit 4 exports different bucking voltages, the gray scale voltage that source electrode driver 2 exports is compensated, when gate drivers 1 control TFT is in opening, voltage compensating circuit exports 0V voltage, the gray scale voltage that source electrode driver exports is not compensated, when gate drivers 1 control TFT is in closed condition, voltage compensating circuit exports bucking voltage, the gray scale voltage that source electrode driver exports is compensated.
In the embodiment of the present invention, display driver circuit comprises voltage compensating circuit, this voltage compensating circuit is when gate drivers control TFT is in closed condition, the gray scale voltage that source electrode driver exports is compensated, therefore, the loss of voltage of TFT turn-off transient pixel electrode can be compensated, make the pixel voltage between pixel electrode with public electrode identical before and after TFT closes, and then guarantee that display device has substantially identical light percent of pass and brightness, improve picture display quality.
The embodiment of the present invention does explanation specifically below with reference to practical application to the above-mentioned display driver circuit that relates to and principle of work thereof.
For reducing the complexity of circuit design in the embodiment of the present invention, totalizer 6 can be arranged at the inside of source electrode driver 2, the quantity of totalizer is set to identical with the quantity of the incoming end accessing gamma reference voltage in gray scale voltage generation circuit, gamma reference circuit 7 in the display driver circuit of thin-film transistor LCD device produces multiple gamma reference voltage, the bucking voltage that totalizer 6 in voltage compensating circuit utilizes power circuit 5 to export is to after gamma reference voltage compensation, access the incoming end of the gray scale voltage generation circuit of source electrode driver 2 respectively, gray scale voltage generation circuit in source electrode driver 2 processes the rear gray scale voltage (source drive voltage) after compensating that exports to each gamma reference voltage, and the gray scale voltage after this compensation is inputed to the source electrode of TFT, and then reach to TFT drain electrode (pixel electrode) voltage compensate.
In the embodiment of the present invention, power circuit 5 affords redress voltage, therefore when TFT is in opening, time schedule controller 3 controls power circuit 5 and exports 0V voltage, does not namely carry out addition compensation to gamma reference voltage; When TFT is in closed condition, time schedule controller 3 controls power circuit 5 and exports required bucking voltage, addition compensation is carried out to gamma reference voltage, the bucking voltage that wherein power circuit 5 provides when TFT is in closed condition is the feed-trough voltage of TFT, reach the object that source drive voltage is compensated, and then the loss of voltage of TFT turn-off transient pixel electrode can be compensated.
Further, in the embodiment of the present invention power circuit 5 export bucking voltage can be with TFT feed-trough voltage for benchmark and have setting threshold range voltage, to reduce, accurately difficulty is controlled to power circuit output voltage.
Concrete, in a frame drive cycle, time schedule controller 3 is respectively to gate drivers 1, source electrode driver 2 and power circuit 5 output timing control signal.When TFT is in opening, this time schedule controller 3 will transmit control signal to power circuit 5, export 0V bucking voltage to make this power circuit 5; When TFT is in closed condition, this time schedule controller 3 will transmit control signal to power circuit 5 equally, export bucking voltage to make this power circuit 5.Therefore, when the voltage of pixel electrode is due to the generation saltus step of feedthrough effect, the source drive voltage that power circuit 5 pairs of source electrode drivers 2 export compensates, and then drain voltage (pixel electrode voltage) is compensated, pixel voltage required by the potential difference that namely can effectively control between pixel electrode and public electrode maintains, thus can effectively avoid feedthrough effect on the impact of the potential difference (PD) between pixel electrode and public electrode, improve the display quality of picture.
Concrete, with reference to voltage oscillogram as shown in Figure 4, the display driver circuit as shown in Figure 3 that the embodiment of the present invention provides can be described in detail.
In the drive cycle of a frame (1F), when Vs is high level, time schedule controller 3 control gate driver 1 exports a high level as start signal, thus makes TFT be in opening.When TFT is in opening, can be clear that, pixel electrode voltage (i.e. the voltage of TFT drain electrode) Vd is increased to high level gradually by low level, in the process, time schedule controller 3 controls power circuit 5 and exports 0V voltage, does not namely compensate the source drive voltage that source electrode driver 2 exports.Now, the potential difference (PD) between pixel electrode and public electrode is Δ V1.
Time schedule controller 3 control gate driver 1 output low level, thus make TFT be in closed condition.When the moment that TFT closes, pixel electrode voltage Vd should occur that one is significantly fallen suddenly, the voltage difference reduced is feed-trough voltage Δ Vp, now, time schedule controller 3 controls power circuit 5 and exports a bucking voltage and compensate source drive voltage, offset Δ Vp, therefore make pixel electrode voltage Vd there will not be suddenly to fall, and kept, compensate for the loss of voltage of TFT turn-off transient pixel electrode, Δ V1 is substantially equal with Δ V2.
Same, when Vs is low level, time schedule controller 3 control gate driver 1 exports a high level and makes TFT be in opening.Now, pixel electrode voltage Vd is increased to high level gradually by low level, and in the process, time schedule controller 3 controls power circuit 5 and exports 0V voltage, does not namely compensate the source drive voltage that source electrode driver 2 exports.Now, the potential difference (PD) between pixel electrode and public electrode is Δ V3.
When time schedule controller 3 control gate driver element 21 output low level, when making TFT be in closed condition, in the moment that TFT closes, pixel electrode voltage Vd should occur that one is significantly fallen suddenly equally, the voltage difference reduced is feed-trough voltage Δ Vp, now, time schedule controller 3 controls power circuit 5 and exports a bucking voltage and compensate source drive voltage, offset Δ Vp, therefore make pixel electrode voltage Vd there will not be suddenly to fall, and kept, compensate for the loss of voltage of TFT turn-off transient pixel electrode, Δ V3 is substantially equal with Δ V4.
In the embodiment of the present invention, power circuit 5 receives the control signal of time schedule controller 3, when receiving TFT start signal, the bucking voltage output valve that power circuit 5 exports is 0V, when receiving TFT shutdown signal, the bucking voltage output valve that power circuit exports is △ Vp, the size of this △ Vp is identical with TFT feed-trough voltage size, and this bucking voltage is used for the source drive voltage that compensating source electrode drive exports, to compensate the loss of voltage of TFT turn-off transient pixel electrode, which reduce diminishing of the pixel voltage caused due to feed-trough voltage.As in Fig. 4 in a certain frame drive cycle, △ 1, △ 2, △ 3, △ 4, △ 5 are substantially equal, namely the pixel voltage required by being maintained by the present invention's potential difference that can effectively control between pixel electrode and public electrode, and and then guarantee TFT close before and after, this display device has substantially identical light percent of pass and brightness, effectively avoid feedthrough effect on the impact of the potential difference (PD) between pixel electrode and public electrode, thus improve picture display quality.
The embodiment of the present invention also provides a kind of display device, comprises display base plate, and the viewing area of this display base plate comprises pixel cell, comprises TFT in each pixel cell, and further, this display device also comprises the above-mentioned display driver circuit related to.
Adopt the display device that the embodiment of the present invention provides, pixel voltage required by the potential difference that can effectively control between pixel electrode and public electrode maintains, and and then guarantee TFT close before and after, this display device has substantially identical light percent of pass and brightness, effectively avoid feedthrough effect on the impact of the potential difference (PD) between pixel electrode and public electrode, thus improve picture display quality.
Based on the display driver circuit related in above-described embodiment, the embodiment of the present invention provides a kind of display drive method, is applied to the display driver circuit that above-described embodiment relates to, and as shown in Figure 5, the display drive method that the embodiment of the present invention provides comprises:
S101: detect the timing control signal that time schedule controller sends to gate drivers.
Concrete, the timing control signal that in the embodiment of the present invention, the state of TFT is sent to gate drivers by time schedule controller controls, when time schedule controller is the start signal of opening thin film transistor (TFT) TFT to the timing control signal that gate drivers exports, gate drivers control TFT is in opening, when time schedule controller is the shutdown signal of cutting out thin film transistor (TFT) TFT to the timing control signal that gate drivers exports, gate drivers control TFT is in closed condition.
When in the embodiment of the present invention, sequence controller is the shutdown signal of closing thin film transistor (TFT) TFT to the timing control signal that gate drivers exports upon this detection, perform S102, when sequence controller is the start signal of opening thin film transistor (TFT) TFT to the timing control signal that gate drivers exports upon this detection, perform S103.
S102: when sequence controller is the shutdown signal of closing thin film transistor (TFT) TFT to the timing control signal that gate drivers exports upon this detection, namely when gate drivers control TFT is in closed condition, control voltage compensating circuit exports bucking voltage, compensates the gray scale voltage that source electrode driver exports.
Concrete, in the embodiment of the present invention, when gate drivers control TFT is in closed condition, voltage compensating circuit exports bucking voltage, and this bucking voltage is identical with TFT feed-trough voltage, compensates the gray scale voltage that source electrode driver exports, gray scale voltage after being compensated, therefore, it is possible to compensate the loss of voltage of TFT turn-off transient pixel electrode, make the pixel voltage between pixel electrode with public electrode identical before and after TFT closes.
Further, in the embodiment of the present invention voltage compensating circuit export bucking voltage can be with TFT feed-trough voltage for benchmark and have setting threshold range voltage, to reduce, accurately difficulty is controlled to power circuit output voltage.
S103: when sequence controller is the start signal of opening thin film transistor (TFT) TFT to the timing control signal that gate drivers exports upon this detection, namely, when gate drivers control TFT is in opening, control voltage compensating circuit does not compensate the gray scale voltage that source electrode driver exports.
In the embodiment of the present invention, voltage compensating circuit comprises power circuit and totalizer, control power circuit by time schedule controller export bucking voltage or do not export bucking voltage, the gray scale voltage realized source electrode driver exports compensates or uncompensation, when TFT is in opening, controls power circuit by time schedule controller and export 0V voltage; When TFT is in closed condition, controls power circuit by time schedule controller and export bucking voltage, the gray scale voltage that source electrode driver exports is compensated.
In the embodiment of the present invention, the bucking voltage that voltage compensating circuit exports compensates the gray scale voltage that source electrode driver exports, the loss of voltage of TFT turn-off transient pixel electrode can be compensated, make the pixel voltage between pixel electrode with public electrode identical before and after TFT closes, and then guarantee that display device has substantially identical light percent of pass and brightness, improve picture display quality.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a display driver circuit, comprising the gate drivers for controlling thin film transistor (TFT) TFT unlatching or closedown and the source electrode driver for exporting gray scale voltage to described TFT source electrode, it is characterized in that, also comprise time schedule controller and voltage compensating circuit, wherein,
Described time schedule controller is connected respectively with described source electrode driver, described gate drivers and described voltage compensating circuit;
The output terminal of described voltage compensating circuit is connected with the gray scale voltage generation circuit incoming end in described source electrode driver, and the incoming end quantity of described gray scale voltage generation circuit is equal with the output terminal quantity of the power circuit in described voltage compensating circuit;
Described gate drivers control described TFT be in closed condition time, described time schedule controller controls described voltage compensating circuit and compensates the gray scale voltage that source electrode driver exports, and exports the gray scale voltage after compensation to TFT source electrode by described source electrode driver.
2. display driver circuit as claimed in claim 1, it is characterized in that, described voltage compensating circuit comprises power circuit and totalizer, wherein,
The input end of described power circuit is connected with described time schedule controller, and output terminal is connected with the first incoming end of described totalizer;
Described totalizer second incoming end is connected with the gamma reference circuit output terminal producing gamma reference voltage;
The output terminal of described totalizer is connected with the incoming end of gray scale voltage generation circuit.
3. display driver circuit as claimed in claim 2, it is characterized in that, the quantity of described totalizer is identical with the incoming end quantity of described gray scale voltage generation circuit.
4. the display driver circuit as described in any one of claim 1-3, is characterized in that, also comprises a voltage adjuster, wherein,
Described voltage adjuster exports different bucking voltages for adjusting described power circuit.
5. display driver circuit as claimed in claim 2, it is characterized in that, the totalizer of voltage compensating circuit is arranged at the inside of described source electrode driver.
6. a display device, comprises display panel, and the viewing area of described display panel comprises pixel cell, and each described pixel cell comprises thin film transistor (TFT) TFT, it is characterized in that, also comprises the display driver circuit described in any one of claim 1-5.
7. a display drive method for display driver circuit described in any one of claim 1-5, is characterized in that, comprising:
Detect the timing control signal that time schedule controller sends to gate drivers;
When sequence controller is the start signal of opening thin film transistor (TFT) TFT to the timing control signal that gate drivers exports upon this detection, control voltage compensating circuit does not compensate the gray scale voltage that source electrode driver exports;
When sequence controller is the shutdown signal of closing thin film transistor (TFT) TFT to the timing control signal that gate drivers exports upon this detection, control voltage compensating circuit exports bucking voltage, compensates the gray scale voltage that source electrode driver exports.
8. display drive method as claimed in claim 7, is characterized in that, the bucking voltage that voltage compensating circuit exports is have the voltage of setting threshold range with TFT feed-trough voltage for benchmark.
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| CN103544927A (en) | 2014-01-29 |
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