CN109461422B - Discharge control circuit and display device - Google Patents
Discharge control circuit and display device Download PDFInfo
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- CN109461422B CN109461422B CN201811620197.3A CN201811620197A CN109461422B CN 109461422 B CN109461422 B CN 109461422B CN 201811620197 A CN201811620197 A CN 201811620197A CN 109461422 B CN109461422 B CN 109461422B
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- 238000001514 detection method Methods 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 10
- 239000004973 liquid crystal related substance Substances 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
The application relates to a discharge control circuit, wherein the discharge control circuit comprises a detection module, a switch module and a control module; the detection module is used for detecting the current of the load; the switch module is connected between the load and the ground; the control module is respectively connected with the detection module and the switch module and used for judging whether the current is smaller than a preset current or not and controlling the switch module to be conducted when the current is smaller than the preset current so as to control the load to discharge to the ground.
Description
Technical Field
The present disclosure relates to display technologies, and particularly to a discharge control circuit and a display device.
Background
A TFT-LCD (Thin Film Transistor Liquid Crystal Display) is one of the major types of flat panel displays, and has become an important Display platform in modern IT and video products. The main driving principle of the TFT-LCD is as follows: the system mainboard connects the R/G/B compression signal, the control signal and the mainboard power supply with a connector (connector) on the PCB board through wires, and the data is processed by a TCON (Timing Controller) Integrated Circuit (IC) on the PCB board and then is connected with the display area through an S-COF (Source-Chip on Film) and a G-COF (Gate-Chip on Film) through the PCB board, so that the LCD can obtain the required power supply and signals.
The liquid crystal display controls the deflection of liquid crystal by the voltage difference of two side electrodes of the liquid crystal panel, wherein one side electrode is a common electrode for providing reference voltage for the liquid crystal panel, and the other side electrode is a pixel electrode. When the voltages of the common electrode and the pixel electrode are the same, the voltage difference between the two side electrodes of the liquid crystal panel is 0, and the display area displays black. When the liquid crystal display is turned off, the voltage of the pixel electrode is reduced to 0 rapidly, and the discharge speed of the common electrode is slow, so that the display area displays abnormal pictures.
Disclosure of Invention
Therefore, it is necessary to provide a discharge control circuit and a display device for solving the problem that the voltage of the pixel electrode is decreased to 0 quickly and the discharge speed of the common electrode is slow when the lcd is turned off, resulting in abnormal picture display in the display area.
A discharge control circuit, the discharge control comprising:
the detection module is used for detecting the current of the load;
the switch module is connected between the load and the ground; and
and the control module is respectively connected with the detection module and the switch module and used for judging whether the current is less than a preset current or not and controlling the switch module to be switched on when the current is less than the preset current so as to control the load to discharge to the ground.
In one embodiment, the detection module comprises:
the current follower comprises a first pin, a second pin, a third pin and a fourth pin, wherein the first pin is connected with a main board power supply, and the second pin is connected with the load;
a first end of the first resistor is connected with the third pin;
the first power supply is connected with the second end of the first resistor; and
and a first end of the second resistor is respectively connected with the fourth pin and the control module, and a second end of the second resistor is grounded.
In one embodiment, the control module comprises:
the judging unit is connected with the first end of the second resistor and used for judging whether the current is smaller than a preset current or not and outputting a control signal when the current is smaller than the preset current; and
and the control unit is respectively connected with the judging unit and the switch module and is used for controlling the switch module to be conducted according to the control signal.
In one embodiment, the determining unit includes an operational amplifier, a non-inverting input terminal of the operational amplifier is connected to the first terminal of the second resistor, an inverting input terminal of the operational amplifier is used for receiving a reference voltage, and an output terminal of the operational amplifier is connected to the control unit.
In one embodiment, the control unit comprises a D flip-flop comprising a first input terminal, a second input terminal, and a first output terminal; the first input end of the D trigger is connected with the output end of the operational amplifier, the second input end of the D trigger is used for receiving a high level signal, and the first output end of the D trigger is connected with the switch module; the first output end of the D flip-flop is used for receiving a high level given by the second input end of the D flip-flop when the first input end of the D flip-flop receives a falling edge transmitted by the output end of the operational amplifier.
In one embodiment, the switch module comprises a plurality of electronic switches; the first end of each electronic switch is connected with the first output end of the D trigger, the second end of each electronic switch is connected with the load, and the third end of each electronic switch is grounded.
In one embodiment, the electronic switch is an NMOS transistor, a first end of the electronic switch corresponds to a gate of the NMOS transistor, a second end of the electronic switch corresponds to a drain of the NMOS transistor, and a third end of the electronic switch corresponds to a source of the NMOS transistor.
In one embodiment, the detection module further includes a capacitor, a first terminal of the capacitor is connected to the second pin of the current follower, and a second terminal of the capacitor is grounded.
A discharge control circuit, the discharge control comprising:
the detection module is used for detecting the current of the load; the detection module comprises a current follower, a first resistor, a first power supply and a second resistor; the current follower comprises a first pin, a second pin, a third pin and a fourth pin, wherein the first pin is connected with a main board power supply, and the second pin is connected with the load; the first end of the first resistor is connected with the third pin; the first power supply is connected with the second end of the first resistor; the first end of the second resistor is respectively connected with the fourth pin and the control module, and the second end of the second resistor is grounded;
the switch module is connected between the load and the ground; and
and the control module is respectively connected with the detection module and the switch module and used for judging whether the current is less than a preset current or not and controlling the switch module to be switched on when the current is less than the preset current so as to control the load to discharge to the ground.
A display device comprises a load, a driving module, a printed circuit board, a power management module and the discharge control circuit; the discharge control circuit and the power management module are both arranged on the printed circuit board; the discharge control circuit is respectively connected with the main board power supply and the power supply management module; the power management module is used for processing the mainboard power supply and providing the processed mainboard power supply for the load so as to drive the load to display the picture.
According to the discharge control circuit and the display device, the current of the load is detected through the detection module, whether the current of the load is smaller than the preset current or not is judged through the control module, and when the current of the load is smaller than the preset current, the switch module is controlled to be conducted to control the load to discharge to the ground, so that the discharge speed of the load is increased, and abnormal pictures displayed by the load are avoided.
Drawings
FIG. 1 is a schematic diagram of a display device according to an embodiment;
fig. 2 is a schematic structural diagram of a display device according to another embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Referring to fig. 1, which is a schematic structural diagram of a display device in an embodiment, the display device 10 may include a display panel 100, a driving module 200, and a printed circuit board 300.
The display panel 100 includes a display area 110 and a non-display area 120, and the display area 110 is an area where image information is displayed, and may also be referred to as an active area (active area). A plurality of data lines 111 and a plurality of gate lines 112 are disposed in the display region 110. The plurality of data lines 111 extend in a first direction and are arranged in a second direction. The gate lines 112 are also referred to as scan lines, and a plurality of the gate lines 112 extend in a second direction and are arranged in a first direction. It can be understood that the extending and arranging directions of the gate line 112 and the data line 111 are opposite, that is, the extending direction of the data line 111 is the arranging direction of the gate line 112, and the arranging direction of the data line 111 is the extending direction of the gate line 112. Meanwhile, the first direction and the second direction are perpendicular to each other, and referring to fig. 1, the first direction may be understood as a vertical direction, that is, an extending direction of a Y axis in a two-dimensional coordinate, and the second direction may be understood as a horizontal direction, that is, an extending direction of an X axis in a two-dimensional coordinate. A plurality of pixel units 113 arranged in an array are further disposed in the display region 110, and the pixel units 113 are electrically connected to the data lines 111 and the gate lines 112, respectively. The non-display area 120 generally refers to an area where no image is displayed, and the partial area is mainly used for pressing some circuits and a part of the sensor in the area.
In the present application, the display panel 100 may be, for example, a TFT-LCD (Thin Film Transistor Liquid Crystal display) display panel, an OLED (Organic Light-Emitting Diode) display panel, a QLED (Quantum Dot Light Emitting Diode) display panel, a curved display panel, or other display panels.
The driving module 200 may include a timing controller 210, a source driving unit 220, and a gate driving unit 230. The source driving unit 220 is electrically connected to the data line 111, and the gate driving unit 230 is electrically connected to the gate line 112. The timing controller 210 is used for transmitting signals to the source driving unit 220 and the gate driving unit 230. Specifically, the timing controller 210 is mainly configured to process R (Red)/G (Green)/B (Blue) compressed signals, control signals and power signals transmitted by the system motherboard, provide data signals and control signals for the data lines 111 through the source driving unit 220, and provide driving signals and control signals for the gate lines 112 through the gate driving unit 230, so that the pixel unit 113 can perform normal display.
The Printed Circuit Board 300 is abbreviated as PCB (Printed Circuit Board). The timing controller 210 is disposed on the printed circuit board 300. The printed circuit board 300 is an important electronic component, is a support for an electronic component, and is a carrier for electrical connection of the electronic component.
Referring to fig. 2, the discharge control circuit includes a detection module 20, a switch module 30 and a control module 40. The detection module 20 is used for detecting the current of the load 400. The switch module 30 is connected between the load 400 and ground. The control module 40 is respectively connected to the detection module 20 and the switch module 30, and configured to determine whether the current is smaller than a preset current, and control the switch module 30 to be turned on when the current is smaller than the preset current, so as to control the load 400 to discharge to the ground.
In this embodiment, the load 400 is the display panel 100.
Note that the switch module 30 is connected to the common electrode of the load 400.
The driving module 200 may further include the discharge control circuit 240 and the power management module 250. The discharge control circuit 240 and the power management module 250 are disposed on the printed circuit board 300. The discharge control circuit 240 is connected to a motherboard power supply 500 of a system motherboard, and the detection module 20 is connected to the load 400 through the power management module 250. Specifically, the power management module 250 is respectively connected to the source driving unit 220 and the gate driving unit 230. The power management module 250 is configured to process the motherboard power supply 500 and provide the processed motherboard power supply 500 to the load 400 through the source driving unit 220 and the gate driving unit 230, so as to drive the load 400 to display a picture.
The current of the load 400 is the current between the power management module 250 and the load 400, i.e. the current between the power management module 250 and the motherboard power supply 500. When the load 400 is turned off, the current of the load 400 is rapidly reduced, and when the current is smaller than a preset current, the control module 40 controls the switch module 30 to be turned on, the load 400 is connected with the ground, and thus the discharge speed of the load 400 can be increased by rapidly discharging the ground.
In one embodiment, referring to fig. 2, the detection module 20 includes a current follower U1, a first resistor R1, a first power source V1, and a second resistor R2. The current follower U1 includes a first pin, a second pin, a third pin, and a fourth pin. The first pin is connected to a motherboard power supply 500, the second pin is connected to the load 400, and specifically, the second pin is connected to the load 400 through the power management module 250. A first end of the first resistor R1 is connected to the third pin. The first power source V1 is connected to the second end of the first resistor R1. A first end of the second resistor R2 is connected to the fourth pin and the control module 40, respectively, and a second end of the second resistor R2 is grounded. The current follower U1 detects the current of the load 400 through the first pin and the second pin, the current between the third pin and the fourth pin is proportional to the current between the first pin and the second pin, if the current between the first pin and the second pin is represented by I12 and the current between the third pin and the fourth pin is represented by I34, I12 is a I34, where a is a fixed value greater than 0.
In an embodiment, please continue to refer to fig. 2, the control module 40 includes a determining unit 41 and a control unit 42. The determination unit 41 is connected to a first end of the second resistor R2. The judging unit 41 is configured to judge whether the current is smaller than a preset current, and output a control signal when the current is smaller than the preset current. The control unit 42 is connected to the determination unit 41 and the switch module 30, respectively. The control unit 42 is configured to control the switch module 30 to be turned on according to the control signal. The determining unit 41 determines whether the load 400 is turned off by determining whether the current is smaller than a preset current, and when the current is smaller than the preset current, the load 400 is turned off, and the determining unit 41 outputs a control signal, so that the control unit 42 controls the switch module 30 to be turned on.
In one embodiment, with continued reference to fig. 2, the determining unit 41 includes an operational amplifier U2, a common input terminal of the operational amplifier U2 is connected to a first terminal of the second resistor R2, an inverting input terminal of the operational amplifier U2 is configured to receive a reference voltage Vref, and an output terminal of the operational amplifier U2 is connected to the control unit 42. When the current I12 between the first pin and the second pin is smaller than a preset current, the current I34 between the third pin and the fourth pin is I12/a smaller than a preset value, so that the divided voltage of the second resistor R2 is smaller than the reference voltage Vref, and the output end of the operational amplifier U2 outputs a low level. The reference voltage Vref is 50% of the voltage across the second resistor R2 to 80% of the voltage across the second resistor R2 when the load 400 is turned on. It will be appreciated that the reference voltage Vref is constant.
The operational amplifier U2 is a low-cost and micro-power consumption chip with voltage reference, thereby reducing cost and saving power consumption.
In one embodiment, with continued reference to fig. 2, the control unit 42 includes a D flip-flop U3, the D flip-flop U3 includes a first input terminal, a second input terminal, and a first output terminal. A first input end of the D flip-flop U3 is connected with an output end of the operational amplifier U2, a second input end of the D flip-flop U3 is used for receiving a high-level signal H, and a first output end of the D flip-flop U3 is connected with the switch module 30; the first output terminal of the D flip-flop U3 is configured to receive a high asserted by the second input terminal of the D flip-flop U3 when the first input terminal of the D flip-flop U3 receives a falling edge transmitted by the output terminal of the operational amplifier U2. By adopting the D trigger U3 and the edge triggering characteristic of the D trigger U3, the interference of an external signal in the signal transmission process can be prevented, and the stability of signal transmission is ensured.
In one embodiment, with continued reference to fig. 2, the switch module 30 includes a plurality of electronic switches Q1. A first terminal of each electronic switch Q1 is connected to the first output terminal of the D flip-flop U3, a second terminal of each electronic switch Q1 is connected to the load 400, and a third terminal of each electronic switch Q1 is grounded.
In this embodiment, the electronic switch Q1 is an NMOS transistor, the first terminal of the electronic switch Q1 corresponds to the gate of the NMOS transistor, the second terminal of the electronic switch Q1 corresponds to the drain of the NMOS transistor, and the third terminal of the electronic switch Q1 corresponds to the source of the NMOS transistor. In other embodiments, the electronic switch Q1 may be an NPN transistor, the first terminal of the electronic switch Q1 corresponds to a base of the NPN transistor, the second terminal of the electronic switch Q1 corresponds to a collector of the NPN transistor, and the third terminal of the electronic switch Q1 corresponds to an emitter of the NPN transistor. The electronic switch Q1 may also be other switches with similar functions. The electronic switch Q1 adopts a MOS field effect transistor or a triode, so that the loss is small, the response is fast, and the electronic switch is stable and reliable.
In an embodiment, with continued reference to fig. 2, the detection module 20 further includes a capacitor C1, a first terminal of the capacitor C1 is connected to the second pin of the current follower U1, and a second terminal of the capacitor C1 is grounded. The capacitor C1 is used to filter the motherboard power supply 500 to provide a stable power supply for the load 400.
The operation of the discharge control circuit will be explained below.
When the load 400 normally works, that is, the load 400 is turned on, the current of the load 400 is greater than or equal to a preset current, the voltage at the equidirectional input end of the operational amplifier U2, that is, the voltage at two ends of the second resistor R2, is greater than or equal to the reference voltage Vref, the output end of the operational amplifier U2 outputs a high level, the D flip-flop U3 does not work, and the NMOS transistor is turned off; when the load 400 is turned off, the current of the load 400 decreases, when the current of the load 400 is smaller than a preset current, the voltage of the equidirectional input end of the operational amplifier U2 is smaller than the reference voltage Vref, the output end of the operational amplifier U2 outputs a low level, the output end of the operational amplifier U2 changes from a high level to a low level, the first input end of the D flip-flop U3 receives a falling edge, the D flip-flop U3 gives the high level of the second input end to the first output end, the NMOS transistor is turned on, and the load 400 is connected with the ground, so that the load 400 can rapidly discharge through the ground to accelerate the discharge speed.
The application discloses discharge control circuit detects the electric current of load through detection module, judges whether the electric current of load is less than preset electric current through control module, and when the electric current of load is less than preset electric current, control switch module switches on to control load discharges to ground, thereby accelerates the discharge speed of load, avoids the load to show unusual picture.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A discharge control circuit, comprising:
the detection module is used for detecting the current of the load;
the detection module comprises a current follower, a first resistor, a first power supply and a second resistor; the current follower comprises a first pin, a second pin, a third pin and a fourth pin, wherein the first pin is connected with a main board power supply, and the second pin is connected with the load; the first end of the first resistor is connected with the third pin; the first power supply is connected with the second end of the first resistor; the first end of the second resistor is respectively connected with the fourth pin and the control module, and the second end of the second resistor is grounded;
the switch module is connected between the load and the ground; and
and the control module is respectively connected with the detection module and the switch module and used for judging whether the current is less than a preset current or not and controlling the switch module to be switched on when the current is less than the preset current so as to control the load to discharge to the ground.
2. The discharge control circuit of claim 1, wherein the control module comprises:
the judging unit is connected with the first end of the second resistor and used for judging whether the current is smaller than a preset current or not and outputting a control signal when the current is smaller than the preset current; and
and the control unit is respectively connected with the judging unit and the switch module and is used for controlling the switch module to be conducted according to the control signal.
3. The discharge control circuit of claim 2, wherein the determining unit comprises an operational amplifier, a non-inverting input of the operational amplifier is connected to the first terminal of the second resistor, an inverting input of the operational amplifier is configured to receive a reference voltage, and an output of the operational amplifier is connected to the control unit.
4. The discharge control circuit of claim 2, wherein the control unit comprises a D flip-flop comprising a first input terminal, a second input terminal, and a first output terminal; the first input end of the D trigger is connected with the output end of the operational amplifier, the second input end of the D trigger is used for receiving a high level signal, and the first output end of the D trigger is connected with the switch module; the first output end of the D flip-flop is used for receiving a high level given by the second input end of the D flip-flop when the first input end of the D flip-flop receives a falling edge transmitted by the output end of the operational amplifier.
5. The discharge control circuit of claim 1, wherein the switch module comprises a plurality of electronic switches; the first end of each electronic switch is connected with the first output end of the D trigger, the second end of each electronic switch is connected with the load, and the third end of each electronic switch is grounded.
6. The discharge control circuit of claim 5, wherein the electronic switch is an NMOS transistor, the first terminal of the electronic switch corresponds to the gate of the NMOS transistor, the second terminal of the electronic switch corresponds to the drain of the NMOS transistor, and the third terminal of the electronic switch corresponds to the source of the NMOS transistor.
7. The discharge control circuit of claim 1, wherein the detection module further comprises a capacitor, a first terminal of the capacitor is connected to the second pin of the current follower, and a second terminal of the capacitor is grounded.
8. A display device, comprising a load, a driving module, a printed circuit board, a power management module, and the discharge control circuit of any one of claims 1 to 7; the discharge control circuit and the power management module are both arranged on the printed circuit board; the discharge control circuit is respectively connected with the main board power supply and the power supply management module; the power management module is used for processing the mainboard power supply and providing the processed mainboard power supply for the load so as to drive the load to display the picture.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447306A (en) * | 2002-03-26 | 2003-10-08 | 华邦电子股份有限公司 | Control device and method for eliminating ghost on panels of liquid crystal |
| JP4909572B2 (en) * | 2005-11-11 | 2012-04-04 | 東芝モバイルディスプレイ株式会社 | Liquid crystal display |
| 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 |
| CN108231030A (en) * | 2018-01-29 | 2018-06-29 | 京东方科技集团股份有限公司 | Discharge circuit, charging method and display device |
| CN108257565A (en) * | 2018-01-09 | 2018-07-06 | 惠科股份有限公司 | Display device and shutdown driving method thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226713C (en) * | 2001-11-19 | 2005-11-09 | 华邦电子股份有限公司 | Circuit and method for rapidly eliminating liquid crystal display shutdown afterimage |
| CN101556776B (en) * | 2008-04-10 | 2011-06-08 | 北京京东方光电科技有限公司 | Driving circuit for realizing rapid discharge of pixel thin film transistor |
| CN102222490B (en) * | 2011-07-26 | 2015-02-18 | 青岛海信电器股份有限公司 | Back light source drive circuit and television |
| KR20150006160A (en) * | 2013-07-08 | 2015-01-16 | 주식회사 실리콘웍스 | Display driving circuit and display device |
| CN106558289B (en) * | 2015-09-30 | 2019-06-18 | 鸿富锦精密工业（深圳）有限公司 | Liquid crystal display device and discharge control method |
| CN105513549B (en) * | 2015-12-29 | 2018-06-29 | 深圳市华星光电技术有限公司 | For eliminating the circuit of liquid crystal display power-off ghost shadow and liquid crystal display |
| CN105976776A (en) * | 2016-06-21 | 2016-09-28 | 深圳天珑无线科技有限公司 | Liquid crystal display screen discharging method, liquid crystal display screen and driving chip thereof |
| CN106952628B (en) * | 2017-05-05 | 2018-05-08 | 惠科股份有限公司 | Ghost eliminating circuit and display device |
| CN206805993U (en) * | 2017-06-07 | 2017-12-26 | 厦门亨立德电子有限公司 | The recording instrument without paper shown with backlight drive |
-
2018
- 2018-12-28 CN CN201811620197.3A patent/CN109461422B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447306A (en) * | 2002-03-26 | 2003-10-08 | 华邦电子股份有限公司 | Control device and method for eliminating ghost on panels of liquid crystal |
| JP4909572B2 (en) * | 2005-11-11 | 2012-04-04 | 東芝モバイルディスプレイ株式会社 | Liquid crystal display |
| 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 |
| CN108257565A (en) * | 2018-01-09 | 2018-07-06 | 惠科股份有限公司 | Display device and shutdown driving method thereof |
| CN108231030A (en) * | 2018-01-29 | 2018-06-29 | 京东方科技集团股份有限公司 | Discharge circuit, charging method and display device |
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| CN109461422A (en) | 2019-03-12 |
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