CN102402967A - Method for controlling source driver in liquid crystal panel - Google Patents
Method for controlling source driver in liquid crystal panel Download PDFInfo
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- CN102402967A CN102402967A CN2011104559196A CN201110455919A CN102402967A CN 102402967 A CN102402967 A CN 102402967A CN 2011104559196 A CN2011104559196 A CN 2011104559196A CN 201110455919 A CN201110455919 A CN 201110455919A CN 102402967 A CN102402967 A CN 102402967A
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Abstract
The invention provides a method for controlling a source driver in a liquid crystal panel, comprising the following steps: providing an STB (set top box) bus signal used to control the data latch time; providing a delay pulse signal used to control the data output time and the charge sharing time, wherein the delay pulse signal is independent of the STB bus signal; and delaying the data output time and the charge sharing time for a certain time to avoid charging a far-end pixel by mistake. Due to the adoption of the method for controlling the source driver in the liquid crystal panel, the data output time and the charge sharing time can be delayed singly without affecting the STB bus signal, the far-end pixel can be prevented from being charged by mistake, the pixel capacitor charging time can not be consumed, and the product reliability and stability can be improved without increasing the control cost of a system.
Description
Technical field
The present invention relates to liquid crystal panel, relate in particular to the control method that is used for Source drive in this liquid crystal panel.
Background technology
Current, in the Source drive (Source Driver) of liquid crystal panel, can produce the signal time-delay because RC loads on an end far away apart from this Source drive, and then cause error in charging pixel capacitance.And this mistake is filled the display quality decline that phenomenon will cause liquid crystal panel.
In the prior art; Fill phenomenon to the mistake that incorrect data line occurred; Three kinds of modes of main employing are avoided; The first adopts output enable signal (OutputEnable), and it two is the control architecture that adopt bilateral gate driver (Bilateral Gate Driver), and it three is to adopt output time-delay (Output Delay) function.Yet,, reduced in the duration of charging of pixel capacitance though utilize the output enable signal that grid is turn-offed in advance; Utilize bilateral gate driver can drive RC load number that monolateral grid bears and reduce half thely, but the gate driver that bilateral gate driver will can double simultaneously causes cost to rise.In addition, can the STB bus signals be elongated so that the later output of the data of next bar data line needn't be sacrificed the duration of charging owing to export delay function, but this settling mode still can cause mistake to fill under the situation that the shared sequential of charging is arranged.
In view of this; How to design a kind of control method that is used for Source drive, when solving above-mentioned each side puzzlement, neither sacrifice the duration of charging of pixel capacitance; Also can not cause the mistake of pixel capacitance to fill, be a problem needing to be resolved hurrily of person skilled in the industry.
Summary of the invention
To liquid crystal panel of the prior art existing above-mentioned defective in the sequential control of Source drive, the invention provides control method a kind of innovation, that in liquid crystal panel, be directed against Source drive.
According to one aspect of the present invention, a kind of control method that in liquid crystal panel, is used for Source drive is provided, wherein, this control method comprises:
One STB bus signals is provided, is used to control the data latching time;
One delay pulse signal is provided, controls a data output time and a shared time of charging by this delay pulse signal, said delay pulse signal and said STB bus signals are independently of one another; And
Said data output time and shared time of said charging are carried out the time-delay of certain numerical value, thereby avoid causing mistake to fill situation the pixel of far-end.
Preferably, this method also comprises: a displacement signal is provided in said Source drive, controls the direction of said data output by the setting value of said displacement signal.More preferably, when displacement signal was high level, the direction of said data output be to apart from said gate driver row pixel far away from the nearer row pixel of the said gate driver of distance.More preferably, when displacement signal is low level, the direction of said data output from the said gate driver of distance row pixel far away to the nearer row pixel of the said gate driver of distance.
Preferably, said Source drive adopts the mode of cascade to transmit said delay pulse signal.
Preferably, the said delay pulse signal that is positioned under the high level state is used to control the shared time of said charging.
Preferably, the negative edge of said delay pulse signal is used to control said data output signal.
Preferably, said STB bus signals and said delay pulse signal are set to the waveform from same signal source.
Preferably, this control method is applicable to the liquid crystal display module of COG (Chip On Glass) or COF (ChipOn Film) type.More preferably, this liquid crystal display module is the demonstration module of TFT-LCD (Thin Film Transistor Liquid Crystal Display, Thin Film Transistor-LCD).
Adopt the control method that is used for Source drive of the present invention; Come control data to latch the time by a STB bus signals, come control data output time and shared time of charging by a delay pulse signal, and then through with the mutual independence between this delay pulse signal and this STB bus signals; Come delay data output and charge the shared time; Therefore, this control method both can have been avoided causing mistake to fill to the pixel of far-end, can guarantee that also the duration of charging of pixel capacitance is unaffected; When not increase system controls cost, reliability of products and stability have been promoted.
Description of drawings
The reader with reference to advantages after the embodiment of the present invention, will become apparent various aspects of the present invention.Wherein,
Fig. 1 illustrates according to one aspect of the present invention, in liquid crystal panel, is used for the process flow diagram of the control method of Source drive; And
Fig. 2 illustrates in the control method of Fig. 1, the sequential synoptic diagram between each control signal.
Embodiment
For technology contents that the application is disclosed is more detailed and complete, can be with reference to accompanying drawing and following various specific embodiments of the present invention, identical mark is represented same or analogous assembly in the accompanying drawing.Yet the embodiment that those of ordinary skill in the art should be appreciated that hereinafter to be provided is used for limiting the scope that the present invention is contained.In addition, accompanying drawing only is used for schematically explaining, does not draw according to its life size.
With reference to the accompanying drawings, the embodiment of various aspects of the present invention is done further to describe in detail.
Fig. 1 illustrates according to one aspect of the present invention, in liquid crystal panel, is used for the process flow diagram of the control method of Source drive.With reference to Fig. 1, in this control method, at first execution in step S11 provides a STB bus signals, comes control data to latch the time by this STB bus signals.Then, in step S13, a delay pulse (Delay Pulse) signal is provided, controls data output (Data Output) time and shared (Charge-sharing) time of charging by this delay pulse signal.At last, in step S15, above-mentioned data output time and shared time of charging are carried out the time-delay of certain numerical value, thereby avoid causing mistake to fill situation the pixel of far-end.
In one embodiment, this method also is included in a displacement signal (D_DP) is provided in the said Source drive, controls the direction of said data output by the setting value of said displacement signal D_DP.For example, when said displacement signal D_DP was high level, the direction of said data output be to apart from said Source drive row pixel far away from the nearer row pixel of the said Source drive of distance.And for example, when said displacement signal is low level, the direction of said data output from the said Source drive of distance row pixel far away to the nearer row pixel of the said Source drive of distance.
In another specific embodiment, said control method is applicable to the liquid crystal display module of COG or COF type.Preferably, this liquid crystal display module is the demonstration module of TFT-LCD (Thin FilmTransistor Liquid Crystal Display, Thin Film Transistor-LCD).
Fig. 2 illustrates in the control method of Fig. 1, the sequential synoptic diagram between each control signal.With reference to Fig. 2, Source drive is X1, X2, X3 to Xn, and D_DP is a displacement signal, and ODLY is a data output time delayed signal, and DP1, DP2 are respectively the delay pulse input signal and the delay pulse output signal of each Source drive, and DP is a delay pulse signal.
In Fig. 2, Source drive adopts the mode of cascade to transmit this delay pulse signal.More specifically; The delay pulse output signals DP 2 of Source drive X1 links to each other with the delay pulse input signal DP1 of Source drive X2; The delay pulse output signals DP 2 of Source drive X2 links to each other with the delay pulse input signal DP1 of Source drive X3, and the delay pulse of Source drive Xn-1 output signals DP 2 links to each other with the delay pulse input signal DP1 of Source drive Xn.For example, the interval time-delay that between the delay pulse input signal DP2 of the delay pulse input signal DP1 of Source drive X1 and Source drive X2, has a duration t.
In addition, as can beappreciated from fig. 2, in the control method of the present invention, delay pulse signal DP and STB bus signals are independent of each other, and each Source drive all receives this delay pulse signal and this STB bus signals.In one embodiment; This STB bus signals is set to the waveform from same signal source with this delay pulse signal; For example, the STB bus signals among Fig. 2 is identical with the signal waveform of the delay pulse input signal X1_DP1 (being delay pulse signal DP) of Source drive X1.
In one embodiment, this delay pulse signal DP that is positioned under the high level state is used for the control shared time of charging.In addition, the negative edge of this delay pulse signal DP is used to control said data output signal.
Adopt the control method that is used for Source drive of the present invention; Come control data to latch the time by a STB bus signals, come control data output time and shared time of charging by a delay pulse signal, and then through with the mutual independence between this delay pulse signal and this STB bus signals; Come delay data output and charge the shared time; Therefore, this control method both can have been avoided causing mistake to fill to the pixel of far-end, can guarantee that also the duration of charging of pixel capacitance is unaffected; When not increase system controls cost, reliability of products and stability have been promoted.
In the preceding text, illustrate and describe embodiment of the present invention.But those skilled in the art can understand, and under situation without departing from the spirit and scope of the present invention, can also specific embodiments of the invention do various changes and replacement.These changes and replacement all drop in claims of the present invention institute restricted portion.
Claims (10)
1. a control method that in liquid crystal panel, is used for Source drive is characterized in that, said control method comprises:
One STB bus signals is provided, is used to control the data latching time;
One delay pulse signal is provided, controls a data output time and a shared time of charging by this delay pulse signal, said delay pulse signal and said STB bus signals are independently of one another; And
Said data output time and shared time of said charging are carried out the time-delay of certain numerical value, thereby avoid causing mistake to fill situation the pixel of far-end.
2. control method according to claim 1 is characterized in that, this method also comprises:
One displacement signal is provided in said Source drive, controls the direction of said data output by the setting value of said displacement signal.
3. control method according to claim 2 is characterized in that, when said displacement signal was high level, the direction of said data output be to apart from said gate driver row pixel far away from the nearer row pixel of the said gate driver of distance.
4. control method according to claim 2 is characterized in that, when said displacement signal is low level, the direction of said data output from the said gate driver of distance row pixel far away to the nearer row pixel of the said gate driver of distance.
5. control method according to claim 1 is characterized in that, said Source drive adopts the mode of cascade to transmit said delay pulse signal.
6. control method according to claim 1 is characterized in that, the said delay pulse signal that is positioned under the high level state is used to control the shared time of said charging.
7. control method according to claim 1 is characterized in that the negative edge of said delay pulse signal is used to control said data output signal.
8. control method according to claim 1 is characterized in that, said STB bus signals and said delay pulse signal are set to the waveform from same signal source.
9. control method according to claim 1 is characterized in that, said control method is applicable to the liquid crystal display module of COG or COF type.
10. control method according to claim 9 is characterized in that, said liquid crystal display module is the demonstration module of TFT-LCD (Thin Film Transistor Liquid Crystal Display, Thin Film Transistor-LCD).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104559196A CN102402967A (en) | 2011-12-27 | 2011-12-27 | Method for controlling source driver in liquid crystal panel |
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| CN2011104559196A CN102402967A (en) | 2011-12-27 | 2011-12-27 | Method for controlling source driver in liquid crystal panel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297712A (en) * | 2016-09-26 | 2017-01-04 | 京东方科技集团股份有限公司 | A kind of display base plate and driving method, display device |
| CN111341234A (en) * | 2020-04-10 | 2020-06-26 | Tcl华星光电技术有限公司 | Test method and device based on display panel data mischarging |
| CN115586667A (en) * | 2022-12-12 | 2023-01-10 | 合肥芯视界集成电路设计有限公司 | Charge sharing method of display panel |
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2011
- 2011-12-27 CN CN2011104559196A patent/CN102402967A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297712A (en) * | 2016-09-26 | 2017-01-04 | 京东方科技集团股份有限公司 | A kind of display base plate and driving method, display device |
| CN106297712B (en) * | 2016-09-26 | 2018-06-15 | 京东方科技集团股份有限公司 | A kind of display base plate and its driving method, display device |
| CN111341234A (en) * | 2020-04-10 | 2020-06-26 | Tcl华星光电技术有限公司 | Test method and device based on display panel data mischarging |
| CN111341234B (en) * | 2020-04-10 | 2021-07-23 | Tcl华星光电技术有限公司 | Test method and device based on display panel data mischarging |
| CN115586667A (en) * | 2022-12-12 | 2023-01-10 | 合肥芯视界集成电路设计有限公司 | Charge sharing method of display panel |
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Application publication date: 20120404 |