CN102074215B - Liquid crystal display and control method thereof - Google Patents
Liquid crystal display and control method thereof Download PDFInfo
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- CN102074215B CN102074215B CN 201110026306 CN201110026306A CN102074215B CN 102074215 B CN102074215 B CN 102074215B CN 201110026306 CN201110026306 CN 201110026306 CN 201110026306 A CN201110026306 A CN 201110026306A CN 102074215 B CN102074215 B CN 102074215B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 79
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- 239000013078 crystal Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
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Abstract
A method for controlling a liquid crystal display accumulates a count value when a backlight module of the liquid crystal display is closed. When the counting value is larger than a preset shutdown time, the liquid crystal display is indicated to enter a power-saving mode. Therefore, through discharging a plurality of pixels of the liquid crystal display, the liquid crystal display can be prevented from generating a flicker phenomenon after being recovered from the power saving mode, and the plurality of pixels are prevented from being damaged due to direct current bias voltage.
Description
Technical field
The present invention relates to a kind of method of controlling liquid crystal display, more particularly, relate to a kind of liquid crystal display of avoiding and recover the rear method that produces scintillation from battery saving mode.
Background technology
Please refer to Fig. 1.Fig. 1 produces the circuit diagram of circuit 100 for the discharge signal of explanation background technology.Discharge signal produces circuit 100 and is used for when a liquid crystal display shut down pixel of liquid crystal display being discharged, and is subjected to Dc bias for a long time and damages with the pixel of avoiding liquid crystal display.Discharge signal produces circuit 100 and comprises bleeder circuit 110, comparator C MP, transistor Q1 and resistance R 1.Transistor Q1 comprises first end (1), the second end (2), and control end (C).The first end of transistor Q1 is coupled to resistance R 1, is used for producing discharge signal SXON.The second end of transistor Q1 is coupled to earth terminal.The control end C of transistor Q1 is coupled to comparator C MP.One end of resistance R 1 is coupled to the first end of transistor Q1, and the other end of resistance R 1 is coupled to voltage source V TCON_PW, and wherein voltage source V TCON_PW is used to provide voltage VTCON_PW, with the power supply as the display controller in the liquid crystal display.Bleeder circuit 110 comprises resistance R 2 and R3.Resistance R 2 and R3 are coupled between voltage source V TCON_PW and the earth terminal.Bleeder circuit 110 is used for producing geometric ratio in the voltage VDET_PW of voltage VTCON_PW.Comparator C MP comparative voltage VDET_PW and a reference voltage VREF.As voltage VDET_PW during greater than reference voltage VREF, the power supply VTCON_PW of expression display controller is not closed.At this moment, comparator C MP sees through the not conducting of control end C control transistor Q1 of transistor Q1.So, voltage source V TCON_PW sees through resistance R 1 voltage on the first end of transistor Q1 is pulled to noble potential, and makes the first end of transistor Q1 produce the discharge signal SXON of expression " not discharging ".As voltage VDET_PW during less than reference voltage VREF, the power supply VTCON_PW of the display controller of expression liquid crystal display is closed.Owing to when the power supply VTCON_PW of the display controller of liquid crystal display is closed, be the shutdown of expression liquid crystal display, the control end C that therefore this moment, comparator C MP saw through transistor Q1 controls transistor Q1 conducting.So, earth terminal sees through the voltage on the first end of transistor Q1 is pulled to electronegative potential, and makes the first end of transistor Q1 produce the discharge signal SXON of expression " discharge ".When the gate driver circuit of liquid crystal display received the discharge signal SXON of expression " discharge ", gate driver circuit is all gate lines of primer fluid crystal display simultaneously, discharge with the pixel to liquid crystal display.So, can avoid the pixel of liquid crystal display to be subjected to Dc bias for a long time and damage.
Yet, as display controller transmission display port (Display Port) interface of liquid crystal display and graphic process unit (the Graphic processing unit of an outside, when GPU) carrying out communication, outside graphic process unit directly transmission display port interface is directly given an order to display controller, enter battery saving mode with the control liquid crystal display, and when liquid crystal display enters battery saving mode, still keep power supply (VTCON_PW) unlatching of display controller.Therefore, the discharge signal of background technology produces circuit 100 and can not produce discharge signal SXON at this moment.In other words, when the graphic process unit transmission display port interface control liquid crystal display of outside entered battery saving mode, gate driver circuit can be with the pixel discharge of liquid crystal display.So, when liquid crystal display was in battery saving mode, pixel in the liquid crystal display may be because being subjected to Dc bias (DC stress) to cause damage for a long time, and cause generation scintillation after liquid crystal display is recovered from battery saving mode.
Summary of the invention
The invention provides a kind of method of controlling liquid crystal display.The method comprises: when a backlight module of a liquid crystal display is closed, and accumulative total one count value; Relatively this count value and is scheduled to the unused time, to produce a comparative result; And according to this comparative result, a plurality of pixels of this liquid crystal display are discharged.This backlight module comprises a plurality of light emitting diodes, and this backlight module receives a backlight electric power voltage, to drive these a plurality of light emitting diodes; Wherein when this backlight module of this liquid crystal display was closed, this count value of accumulative total comprised: produce geometric ratio and detect voltage in one of this backlight electric power voltage; And when this detects voltage less than a critical voltage, this count value of accumulative total.
According to this comparative result, a plurality of pixels of this liquid crystal display are discharged to be comprised: when this comparative result represents this count value greater than this predetermined unused time, a plurality of pixels of this liquid crystal display are discharged.
When this comparative result represents this count value greater than this predetermined unused time, a plurality of pixels of this liquid crystal display are discharged comprise: a gate driver circuit of controlling this liquid crystal display starts many gate lines that are coupled to these a plurality of pixels in this liquid crystal display simultaneously, so that these a plurality of pixels are discharged.
When this comparative result represents this count value greater than this predetermined unused time, after through a time delay, this count value of resetting.So, can avoid this liquid crystal display after battery saving mode recovers, to produce scintillation, and avoid these a plurality of pixels because damaged by Dc bias.
The present invention provides a kind of liquid crystal display in addition.This liquid crystal display comprises a display panel, comprise a gate driver circuit, many gate lines, many data lines and a plurality of pixel, when this gate driver circuit started a gate line in these many gate lines, the pixel that is coupled to this gate line in these a plurality of pixels saw through corresponding data line receive data; One backlight module is used to provide backlight to this display panel; One display controller is used for when this backlight module is closed, accumulative total one count value, and relatively this count value and is scheduled to the unused time, to produce a control signal; And one discharge signal produce circuit, be used for one first voltage that receives according to this control signal and this display controller, to produce a discharge signal; Wherein when this gate driver circuit received this discharge signal of expression discharge, this gate driver circuit drove this many gate lines simultaneously, so that these a plurality of pixels are discharged.
This backlight module comprises a plurality of light emitting diodes, and this backlight module receives a backlight electric power voltage, to drive these a plurality of light emitting diodes; Wherein this display controller comprises: a testing circuit is used for producing an enabling signal according to this backlight electric power voltage and a critical voltage; One counter is used for when this enabling signal represents to start, accumulative total one count value; And one first comparer, be used for relatively this count value and a predetermined unused time, when this count value during less than this predetermined unused time, this first comparer produces this control signal of expression one first predetermined logic, and when this count value during greater than this predetermined unused time, this first comparer produces this control signal of expression one second predetermined logic.
This testing circuit comprises: a bleeder circuit is used for producing geometric ratio and detects voltage in one of this backlight electric power voltage; And one second comparer, be used for relatively this detection voltage and this critical voltage, when this detected voltage less than this critical voltage, this second comparer produced this enabling signal that expression starts.
This display controller comprises in addition: a delay circuit, and when this delay circuit received this control signal of this second predetermined logic of expression, after a time delay, this delay circuit produced a reset signal; Wherein this counter is according to this reset signal this count value of resetting.
This discharge signal produces circuit and comprises: a bleeder circuit is used for producing geometric ratio in a second voltage of this first voltage; One the 3rd comparer is used for producing a comparison signal according to this second voltage and a reference voltage, when this second voltage greater than this reference voltage, this comparison signal represents one first predetermined logic, and works as this second voltage less than this reference voltage, and this comparison signal represents one second predetermined logic; One resistance comprise that a first end is used for receiving this first voltage, and one second end is used for exporting this discharge signal; One transistor comprises that a first end is coupled to this second end of this resistance, and one second end couples earth terminal, and a control end; And one or the door, comprise that a first input end is used for receiving this control signal, one second input end is used for receiving this comparison signal, and one output terminal be coupled to this transistorized this control end, when this comparison signal or this control signal represent this second predetermined logic, be somebody's turn to do or this transistor turns of gate control, so that this discharge signal represents discharge, and when this comparison signal and this control signal all represent this first predetermined logic, this or this transistor of gate control are closed, so that this discharge signal represents not discharge.So, can avoid this liquid crystal display after battery saving mode recovers, to produce scintillation, and avoid these a plurality of pixels because damaged by Dc bias.
Description of drawings
Fig. 1 is the circuit diagram that the discharge signal of explanation background technology produces circuit;
Fig. 2 is the synoptic diagram of explanation liquid crystal display of the present invention;
Fig. 3 is the synoptic diagram that explanation display controller of the present invention and discharge signal produce circuit;
[main element symbol description]
1,2, C end points
110,2311,241 bleeder circuits
200 liquid crystal display
201 graphic process unit
210 display panels
211 gate driver circuits
212 data drive circuits
220 backlight modules
230 display controllers
232 counters
233 delay circuits
240,100 discharge signals produce circuit
242 or the door
The CLC liquid crystal capacitance
The CST storage capacitors
CMP, CMP1～CMP3 comparer
D1～DM data line
G1～GN gate line
I1, I2 input end
The NC count value
NOFF is scheduled to the unused time
The O output terminal
The PIX1 pixel
Q, Q1 transistor
R1～R5 resistance
The SC control signal
The SCLK clock signal
The SCMP comparison signal
The SRST reset signal
The SXON discharge signal
VDET1 detects voltage
VDET_PW voltage
The VREF reference voltage
The VTCON_PW voltage source
The VTH critical voltage
Embodiment
Please refer to Fig. 2.Fig. 2 is the synoptic diagram of explanation liquid crystal display 200 of the present invention.Liquid crystal display 200 comprises display panel 210, backlight module 220, display controller 230, and discharge signal produces circuit 240.Display panel 210 comprises gate driver circuit 211, data drive circuit 212, gate lines G 1～GN, data line D1～DM and a plurality of pixel.The structure of these a plurality of pixels can pixel PIX1 explanation for example.Pixel PIX1 comprises transistor Q, liquid crystal capacitance CLS and storage capacitors CST.Transistor Q comprises first end (1), the second end (2), and control end (C).The first end of transistor Q is coupled to data line D1, and the second end of transistor Q is coupled to liquid crystal capacitance CLS and storage capacitors CST, and the control end of transistor Q is coupled to gate lines G 1.Liquid crystal capacitance CLS and storage capacitors CST coupled in parallel are between the second end and earth terminal of transistor Q.When gate driver circuit 211 starts gate lines G 1, transistor Q conducting, so data drive circuit 212 can see through data line D1 and transistor Q data writing to the storage capacitors CST of pixel PIX1.Therefore, as shown in the above description, when gate driver circuit 211 started the gate line of G1～GN in the gate line, the pixel that is coupled to this gate line in a plurality of pixels can see through corresponding data line D1～DM receive data.Backlight module 220 is used to provide backlight to display panel 210.Display controller 230 is used for carrying out communication with the graphic process unit 201 of an outside.Graphic process unit 201 can send order to display controller 230, enters battery saving mode with control liquid crystal display 200.For example, graphic process unit 201 transmission display port interfaces and display controller 230 carry out communication.Because when graphic process unit 201 transmission display port interfaces transmission order enters battery saving mode with control liquid crystal display 200, graphic process unit 201 is controlled simultaneously backlight module 220 and is closed, therefore display controller 230 can be when backlight module 220 be closed, accumulative total one count value, and relatively count value and is scheduled to the unused time.When count value during greater than the predetermined unused time, expression liquid crystal display 200 enters battery saving mode.Display controller 230 produces the control signal SC of presentation logics " 1 " at this moment, produces the discharge signal SXON of expression " discharge " with controlled discharge signal generating circuit 240.So, gate driver circuit 211 according to the expression " discharge " discharge signal SXON the time, start simultaneously gate lines G 1～GN, discharge with a plurality of pixels to liquid crystal display 200.To illustrate further that below display controller 230 and discharge signal produce structure and the principle of work of circuit 240.
Please refer to Fig. 3.Fig. 3 produces the synoptic diagram of circuit 240 for explanation display controller 230 and discharge signal.Be that hypothesis backlight module 220 is a light emitting diode (Light-Emitting Diode, LED) backlight module in Fig. 3.Backlight module 220 comprises a plurality of light emitting diodes, and backlight module 220 receptions one backlight electric power voltage VLED, to drive a plurality of light emitting diodes in the backlight module 220.When display controller 230 is closed in backlight module 220, stored count value NC, and compare count value NC and predetermined unused time NOFF, to produce control signal SC.Display controller 230 comprises testing circuit 231, counter 232, comparator C MP1, and delay circuit 233.Testing circuit 231 produces according to backlight electric power voltage VDET and a critical voltage VTH
Signal SEN.Testing circuit 231 comprises bleeder circuit 2311 and comparator C MP2.Bleeder circuit 2311 comprises resistance R 4 and R5.One termination of resistance R 4 is received backlight electric power voltage VLED, and the other end of resistance R 4 is coupled to resistance R 5.One end of resistance R 5 is coupled to resistance R 4, and the other end of resistance R 5 is coupled to earth terminal.So, bleeder circuit 2311 can produce geometric ratio in the detection voltage VDET1 of backlight electric power voltage VLED.Comparator C MP2 is used for relatively detecting voltage VDET1 and a critical voltage VTH.When detecting voltage VDET1 greater than critical voltage VTH, expression backlight module 220 is not closed.This moment, comparator C MP2 produced the enabling signal SEN of expression " not starting ".When detecting voltage VDET1 less than critical voltage VTH, expression backlight module 220 is closed.At this moment, comparator C MP2 produces the enabling signal SEN of expression " startup ".Counter 232 receives enabling signal SEN.When enabling signal SEN represented " startup ", counter 232 accumulative totals were also exported a count value NC.For example, the clock signal SCLK that counter 232 can receive according to display controller 230, stored count value NC.When counter 232 received a clock pulse signal SCLK, counter 232 increased by one with count value NC.Comparator C MP1 is used for comparison count value NC and a predetermined unused time NOFF.As count value NC during less than predetermined unused time NOFF, comparator C MP1 produces the control signal SC of presentation logic " 0 ".When count value NC is surpassed predetermined unused time NOFF by accumulative total, be that expression liquid crystal display 200 is not shutdown, but enter battery saving mode.At this moment, comparator C MP1 produces the control signal SC of presentation logic " 1 ".Delay circuit 233 is used for after a time delay, producing a reset signal SRST when receiving the control signal SC of expression predetermined logic " 1 ".Counter 232 is according to the reset signal SRST count value NC that can reset.So, when next backlight module 220 is closed, counter 232 again stored count values NC.
Discharge signal produces circuit 240 and is used for the voltage VTCON_PW (wherein VTCON_PW is the power supply of display controller 230) that receives according to control signal SC and display controller 230, generation discharge signal SXON.Discharge signal produces circuit 240 and comprises bleeder circuit 241, comparator C MP3, resistance R 1, transistor Q1, and or door 242.Transistor Q1 comprises first end (1), the second end (2), and control end (C).The first end of transistor Q1 is coupled to resistance R 1, is used for producing discharge signal SXON.The second end of transistor Q1 is coupled to earth terminal.The control end C of transistor Q1 is coupled to or door 242.One end of resistance R 1 is coupled to the first end of transistor Q1, and the other end of resistance R 1 is coupled to voltage source V TCON_PW.Bleeder circuit 241 comprises resistance R 2 and R3.Resistance R 2 and R3 are coupled between voltage source V TCON_PW and the earth terminal.Bleeder circuit 241 is used for producing geometric ratio in the voltage VDET_PW of voltage VTCON_PW.Comparator C MP3 comparative voltage VDET_PW and a reference voltage VREF.As voltage VDET_PW during greater than reference voltage VREF, the power supply VTCON_PW of expression display controller 230 is not closed.At this moment, comparator C MP3 produces the comparison signal SCMP of presentation logic " 0 ".As voltage VDET_PW during less than reference voltage VREF, the power supply VTCON_PW of expression display controller 230 is closed.At this moment, comparator C MP3 produces the comparison signal SCMP of presentation logic " 1 ".Or door 242 comprises input end I1 and I2, and output terminal O.Input end I1 is used for reception control signal SC, and input end I2 is used for receiving comparison signal SCMP, and output terminal O is coupled to the control end of transistor Q1.As comparison signal SCMP and control signal SC all during presentation logic " 0 ", power supply VTCON_PW and the backlight module of expression display controller 230 all are not closed.In other words, liquid crystal display 200 is not shut down, and does not enter battery saving mode yet.At this moment, or the door 242 controls control end C transistor Q1 that see through transistor Q1 close.So, voltage source V TCON_PW sees through resistance R 1 voltage on the first end of transistor Q1 is pulled to noble potential, and makes discharge signal SXON represent " not discharging ".When comparison signal SCMP presentation logic " 1 ", the power supply VTCON_PW of expression display controller 230 is closed.In other words, liquid crystal display 200 may be to be shut down or to enter battery saving mode.This moment or door 242 see through the control end C control transistor Q1 conducting of transistor Q1.So, earth terminal sees through resistance R 1 voltage on the first end of transistor Q1 is pulled to electronegative potential, and makes discharge signal SXON represent " discharge ".When control signal SC presentation logic " 1 ", represent that backlight module 220 is closed above predetermined unused time NOFF this moment, and the power supply VTCON_PW of display controller 230 is not closed.In other words, liquid crystal display 200 is to enter battery saving mode.For example, graphic process unit 201 transmission display port interfaces send order and enter battery saving mode with control liquid crystal display 200.Therefore, this moment or door 242 see through the control end C control transistor Q1 conducting of transistor Q1.So, earth terminal sees through resistance R 1 voltage on the first end of transistor Q1 is pulled to electronegative potential, and makes discharge signal SXON represent " discharge ".When gate driver circuit 211 received the discharge signal SXON of expression " discharge ", gate driver circuit 211 is the gate lines G 1～GN of primer fluid crystal display 200 simultaneously, so that the pixel of liquid crystal display 200 is discharged.So, can avoid the pixel of liquid crystal display 200 to be subjected to Dc bias for a long time and damage, and avoid liquid crystal display 200 after battery saving mode recovers, to produce scintillation.
In sum, in liquid crystal display 200, when backlight module 220 was closed, display controller 230 was stored count value NC, and display controller 230 comparison count value NC and predetermined unused time NOFF, to produce a comparative result.Discharge signal produces circuit 240 and produces discharge signal SXON according to this comparative result, discharges with a plurality of pixels to liquid crystal display 200.More particularly, when comparative result represents this count value NC greater than this predetermined unused time NOFF, be that expression liquid crystal display 200 is not shut down, but enter battery saving mode.Therefore, display controller 230 produces the control signal SC of presentation logic " 1 ".Delay circuit 233 after through a time delay, produces reset signal SRST with replacement count value NC according to the control signal SC of presentation logic " 1 ".And discharge signal produce in the circuit 240 or door 242 according to the control signal SC control transistor Q1 conductings of presentation logic " 1 ".So, earth terminal sees through transistor Q1 the voltage on the first end of transistor Q1 is pulled to electronegative potential, and so that the first end of transistor Q1 produces the discharge signal SXON of expression " discharge ".In other words, this moment, discharge signal produced the gate lines G 1～GN that is coupled to a plurality of pixels in the circuit 240 control gate driver circuits 211 while primer fluid crystal display 200, so that the pixel in the liquid crystal display 200 is discharged.Thus, produce scintillation after can avoiding liquid crystal display 200 of the present invention to recover from battery saving mode, and avoid pixel in the liquid crystal display 200 of the present invention because damaged by Dc bias.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (9)
1. method of controlling liquid crystal display comprises:
When a backlight module of a liquid crystal display is closed, accumulative total one count value;
Relatively this count value and is scheduled to the unused time, to produce a comparative result; And
According to this comparative result, one discharge signal produces circuit and controls many gate lines that are coupled to a plurality of pixels in the gate driver circuit while primer fluid crystal display, discharge with a plurality of pixels to this liquid crystal display, wherein this backlight module receives a backlight electric power voltage, when this backlight module is closed, produce geometric ratio and detect voltage in one of backlight electric power voltage, when this detects voltage less than a critical voltage, this count value of accumulative total.
2. the method for control liquid crystal display as claimed in claim 1, it is characterized in that: this backlight module comprises a plurality of light emitting diodes, and this backlight module receives a backlight electric power voltage, to drive these a plurality of light emitting diodes.
3. the method for control liquid crystal display as claimed in claim 1, it is characterized in that: according to this comparative result, a plurality of pixels of this liquid crystal display are discharged comprise: when this comparative result represents this count value greater than this predetermined unused time, a plurality of pixels of this liquid crystal display are discharged.
4. the method for control liquid crystal display as claimed in claim 1 is characterized in that further comprising: when this comparative result represents this count value greater than this predetermined unused time, and after through a time delay, this count value of resetting.
5. liquid crystal display comprises:
One display panel, comprise a gate driver circuit, many gate lines, many data lines and a plurality of pixel, when this gate driver circuit started a gate line in these many gate lines, the pixel that is coupled to this gate line in these a plurality of pixels saw through corresponding data line receive data;
One backlight module is used to provide backlight to this display panel;
One display controller, be used for when this backlight module is closed, accumulative total one count value, and relatively this count value and a predetermined unused time, to produce a control signal, wherein backlight module receives a backlight electric power voltage, this display controller comprises a testing circuit, be used for producing geometric ratio and detect voltage in one of backlight electric power voltage, when this detects voltage less than this critical voltage, produce an enabling signal;
One counter, this counter receives this enabling signal, is used for when this enabling signal represents to start accumulative total one count value; And
One discharge signal produces circuit, be used for one first voltage that receives according to this control signal and this display controller, to produce a discharge signal, wherein when this count value during greater than the predetermined unused time, display controller produces this control signal of a presentation logic " 1 ", and this discharge signal produces circuit according to the control signal generation discharge signal of presentation logic " 1 ";
Wherein when this gate driver circuit received this discharge signal of expression discharge, this gate driver circuit drove this many gate lines simultaneously, so that these a plurality of pixels are discharged.
6. liquid crystal display as claimed in claim 5, it is characterized in that: this backlight module comprises a plurality of light emitting diodes, and this backlight module receives a backlight electric power voltage, to drive these a plurality of light emitting diodes;
Wherein this display controller also comprises:
One first comparer, be used for relatively this count value and a predetermined unused time, when this count value during less than this predetermined unused time, this first comparer produces this control signal of expression one first predetermined logic, and when this count value during greater than this predetermined unused time, this first comparer produces this control signal of expression one second predetermined logic.
7. liquid crystal display as claimed in claim 6 is characterized in that this testing circuit comprises:
One bleeder circuit is used for producing geometric ratio and detects voltage in one of this backlight electric power voltage; And
One second comparer is used for relatively this detection voltage and this critical voltage, and when this detected voltage less than this critical voltage, this second comparer produced this enabling signal that expression starts.
8. liquid crystal display as claimed in claim 5 is characterized in that this display controller comprises in addition:
One delay circuit, when this delay circuit received this control signal of this second predetermined logic of expression, after a time delay, this delay circuit produced a reset signal;
Wherein this counter is according to this reset signal this count value of resetting.
9. liquid crystal display as claimed in claim 5 is characterized in that this discharge signal produces circuit and comprises:
One bleeder circuit is used for producing geometric ratio in a second voltage of this first voltage;
One the 3rd comparer is used for producing a comparison signal according to this second voltage and a reference voltage, when this second voltage greater than this reference voltage, this comparison signal represents one first predetermined logic, and works as this second voltage less than this reference voltage, and this comparison signal represents one second predetermined logic;
One resistance comprise that a first end is used for receiving this first voltage, and one second end is used for exporting this discharge signal;
One transistor comprises that a first end is coupled to this second end of this resistance, and one second end couples earth terminal, and a control end; And
One or the door, comprise that a first input end is used for receiving this control signal, one second input end is used for receiving this comparison signal, and one output terminal be coupled to this transistorized this control end, when this comparison signal or this control signal represent this second predetermined logic, should or this transistor turns of gate control, so that this discharge signal represents discharge, and when this comparison signal and this control signal all represent this first predetermined logic, should or this transistor of gate control close so that this discharge signal represents not discharge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW99144406A TWI433083B (en) | 2010-12-17 | 2010-12-17 | Liquid crystal display and control method thereof |
| TW099144406 | 2010-12-17 |
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| Publication Number | Publication Date |
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| CN102074215A CN102074215A (en) | 2011-05-25 |
| CN102074215B true CN102074215B (en) | 2013-04-03 |
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| CN 201110026306 Expired - Fee Related CN102074215B (en) | 2010-12-17 | 2011-01-21 | Liquid crystal display and control method thereof |
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| TW (1) | TWI433083B (en) |
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| TWI646515B (en) * | 2018-01-19 | 2019-01-01 | 友達光電股份有限公司 | Display device |
| CN111477182B (en) * | 2019-01-23 | 2022-03-04 | 纬联电子科技(中山)有限公司 | Display device and power-off control method thereof |
| CN110956926B (en) * | 2019-12-26 | 2021-04-09 | 苏州椒图电子有限公司 | Display screen driving control method and device and display screen |
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| CN101029987A (en) * | 2007-03-28 | 2007-09-05 | 友达光电股份有限公司 | Color sequential display device with back-light time delay control and its controlling method |
| CN101174038A (en) * | 2006-11-01 | 2008-05-07 | 群康科技(深圳)有限公司 | LCD device |
| CN101299322A (en) * | 2007-04-30 | 2008-11-05 | 联詠科技股份有限公司 | Control method for eliminating closedown ghost as well as display device and drive device |
| CN101540149A (en) * | 2008-03-20 | 2009-09-23 | 中华映管股份有限公司 | Device for eliminating shutdown shadow and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620829B (en) * | 2008-07-04 | 2012-02-08 | 群康科技(深圳)有限公司 | Backlight protective circuit |
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2010
- 2010-12-17 TW TW99144406A patent/TWI433083B/en not_active IP Right Cessation
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- 2011-01-21 CN CN 201110026306 patent/CN102074215B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174038A (en) * | 2006-11-01 | 2008-05-07 | 群康科技(深圳)有限公司 | LCD device |
| CN101029987A (en) * | 2007-03-28 | 2007-09-05 | 友达光电股份有限公司 | Color sequential display device with back-light time delay control and its controlling method |
| CN101299322A (en) * | 2007-04-30 | 2008-11-05 | 联詠科技股份有限公司 | Control method for eliminating closedown ghost as well as display device and drive device |
| CN101540149A (en) * | 2008-03-20 | 2009-09-23 | 中华映管股份有限公司 | Device for eliminating shutdown shadow and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102074215A (en) | 2011-05-25 |
| TW201227647A (en) | 2012-07-01 |
| TWI433083B (en) | 2014-04-01 |
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