CN100362561C - TV set LCD time sequence controlling method during standby - Google Patents
TV set LCD time sequence controlling method during standby Download PDFInfo
- Publication number
- CN100362561C CN100362561C CNB2005100218661A CN200510021866A CN100362561C CN 100362561 C CN100362561 C CN 100362561C CN B2005100218661 A CNB2005100218661 A CN B2005100218661A CN 200510021866 A CN200510021866 A CN 200510021866A CN 100362561 C CN100362561 C CN 100362561C
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- driving circuit
- time sequence
- screen
- main control
- controlling method
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Abstract
The present invention relates to a TV LCD sequential control method in a stand-by state. The present invention sequentially comprises the following steps: 1. a main controlling microprocessor sends out a control signal after receiving a stand-by signal to turn off an electricity supplying power supply of a back light module set of a liquid crystal television screen; 2. afterwards, the main controlling microprocessor cancels relative signals of a driving circuit of a liquid display screen. Due to the adoption of the scheme, the back light module set of a liquid crystal television screen is firstly turned off after a stand-by command is received, and at this time, disordered low-voltage differential signals input to the driving circuit of a liquid display screen can not be displayed for the reason that a back light lamp lies in a black-screen state. In this way, a confused screen caused by disordered LVDS signals can not be seen.
Description
[technical field]
The present invention relates to LCD TV, be specifically related to TV set LCD time sequence controlling method during standby.
[background technology]
Be no signal condition during the LCD TV standby, low-voltage differential (LVDS) signal of signal processing controller output is a chaotic, and the clock signal of the driving circuit of LCDs is to be provided by the LVDS signal.When the clock signal of driving circuit was undesired, driving circuit can't operate as normal.If close earlier the driving circuit power supply of liquid crystal television screen, close LVDS signal that screen drives again and close the phenomenon that the module backlight of liquid crystal television screen will be seen the flower screen at last.Be that whole screen is various colored vertical bars, normally closing image signal.
[summary of the invention]
The present invention has overcome shortcoming of the prior art, and a kind of LCD TV standby sequential control method is provided.
Technical scheme of the present invention is a kind of LCD TV standby sequential control method: close the power supply of liquid crystal television screen module backlight earlier, close the output of LVDS signal then, close the drive circuitry of LCDs at last.
Owing to adopted above scheme, after standby command, earlier the module backlight of liquid crystal television screen is closed, even the driving circuit of the Low Voltage Differential Signal input panel of chaotic is arranged this moment, and because backlight is in the blank screen state, and can not show, so just cannot see because the flower screen that LVDS signal chaotic is produced.
[description of drawings]
Fig. 1 is a circuit diagram of the present invention;
Fig. 2 is a sequential control schematic flow sheet of the present invention;
Fig. 3 is a sequential synoptic diagram of the present invention.
[embodiment]
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.As shown in Figure 1, Q1 is a NPN type triode, and U2 is an enhancement mode P-channel field-effect transistor (PEFT) pipe, PLANE DRIVE is the driving circuit of LCDs, PLANE INVERTER is the LCD screen backlight module, and CPU is a main control microprocessor, and TSU6666 is a signal processing controller.
As Fig. 1, shown in Figure 3, send standby signal after, main control microprocessor CPU output low level is closed the power supply of the module backlight (PLANE INVERTER) of LCDs; After time T 6, close the output of LVDS signal by signal processing controller TSU6666; T3 after closing the output of LVDS signal is closed the power supply of the driving circuit of LCD by main control microprocessor in the time.Wherein the time span of T6 and T3 can be with reference to following table:
| Parameter | Minimum value | Maximal value | Unit |
| T6 | 100 | Millisecond | |
| T3 | 0 | 50 | Millisecond |
As Fig. 1, Fig. 2 and shown in Figure 3, send standby signal after, be not the driving circuit power supply of at once closing LCDs, but the time-delay power down.When standby, the I/O mouth of main control microprocessor CPU is exported the low level of OV, removes to close the power supply of the module backlight (PLANE INVERTER) of LCDs, and whole like this LCD screen is a black.After 100 milliseconds of the power supplies of closing the module backlight of LCDs (PLANE INVERTER), by the output signal of main control microprocessor cancellation serial data bus (SDA) and serial clock bus (SCL), thus the output of the Low Voltage Differential Signal (LVDS) of cancellation TSU6666.In 50 milliseconds of the LVDS signal output of closing TSU6666, close the power supply of the driving circuit of LCD by main control microprocessor, specific as follows: by the low level of the 2nd I/O mouth output 0V of main control microprocessor CPU.This moment, the base stage of Q1 was 0V, and the emitter junction of Q1 and collector junction are all partially anti-, lose amplification and be high-impedance state, and approximate open circuit between each utmost point, triode Q1 ends.This moment Q1 the collector level be 11.7V be field effect pipe (U2) the 4. the pin grid be 11.7V.Field effect transistor U2 is an enhancement mode P-channel field-effect transistor (PEFT) pipe, does not have conducting channel between Ugs=0V hourglass source electrode, when Ugs＜-just conducting channel might appear during 0.7V.Voltage U gs=-0.3V between field effect transistor U2 grid source makes U2 end at this moment, the drain electrode no-output of U2, and the power supply of the driving circuit of LCDs is closed like this.
Claims (3)
1. TV set LCD time sequence controlling method during standby, it is characterized in that: in turn include the following steps: 1) after receiving standby signal, main control microprocessor sends control signal, close the power supply of liquid crystal television screen module backlight earlier, 2a) close Low Voltage Differential Signal output by main control microprocessor control signal processing controller earlier, 2b) send control signal by main control microprocessor again, close the power supply of LCDs driving circuit.
2. TV set LCD time sequence controlling method during standby according to claim 1 is characterized in that: described step 2a) finish as follows: main control microprocessor stops to send serial data bus and serial clock bus signals to the driving circuit of LCDs.
3. TV set LCD time sequence controlling method during standby according to claim 1 and 2, it is characterized in that: after finishing described step 1), continue more than 100 milliseconds, carry out step 2a again), at completing steps 2a) afterwards the duration is carried out step 2b again in 50 milliseconds).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100218661A CN100362561C (en) | 2005-10-10 | 2005-10-10 | TV set LCD time sequence controlling method during standby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100218661A CN100362561C (en) | 2005-10-10 | 2005-10-10 | TV set LCD time sequence controlling method during standby |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1766977A CN1766977A (en) | 2006-05-03 |
| CN100362561C true CN100362561C (en) | 2008-01-16 |
Family
ID=36742829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100218661A Expired - Fee Related CN100362561C (en) | 2005-10-10 | 2005-10-10 | TV set LCD time sequence controlling method during standby |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100362561C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908322B (en) * | 2009-06-05 | 2012-05-30 | 瑞轩科技股份有限公司 | Display method of liquid crystal display television |
| CN106383611B (en) | 2016-09-27 | 2019-03-12 | 京东方科技集团股份有限公司 | Display control circuit and its display control method and display device |
| CN113573107A (en) * | 2020-04-28 | 2021-10-29 | 海信视像科技股份有限公司 | Display apparatus and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH064047A (en) * | 1992-06-22 | 1994-01-14 | Canon Inc | Display device |
| JP2003046640A (en) * | 2001-07-30 | 2003-02-14 | Toshiba Corp | Mobile communication terminal |
| CN1420483A (en) * | 2001-11-19 | 2003-05-28 | 华邦电子股份有限公司 | Circuit and method for quick eliminating off afterimage of liquid crystel display |
| CN1588528A (en) * | 2004-08-09 | 2005-03-02 | 友达光电股份有限公司 | Liquid crystal display and method for improving picture flash and residual picture in turn off process |
-
2005
- 2005-10-10 CN CNB2005100218661A patent/CN100362561C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH064047A (en) * | 1992-06-22 | 1994-01-14 | Canon Inc | Display device |
| JP2003046640A (en) * | 2001-07-30 | 2003-02-14 | Toshiba Corp | Mobile communication terminal |
| CN1420483A (en) * | 2001-11-19 | 2003-05-28 | 华邦电子股份有限公司 | Circuit and method for quick eliminating off afterimage of liquid crystel display |
| CN1588528A (en) * | 2004-08-09 | 2005-03-02 | 友达光电股份有限公司 | Liquid crystal display and method for improving picture flash and residual picture in turn off process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1766977A (en) | 2006-05-03 |
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