CN111277255A - Time sequence control system and display panel - Google Patents
Time sequence control system and display panel Download PDFInfo
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- CN111277255A CN111277255A CN202010202013.2A CN202010202013A CN111277255A CN 111277255 A CN111277255 A CN 111277255A CN 202010202013 A CN202010202013 A CN 202010202013A CN 111277255 A CN111277255 A CN 111277255A
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- 230000005669 field effect Effects 0.000 claims description 20
- 239000004973 liquid crystal related substance Substances 0.000 claims description 10
- 230000003111 delayed effect Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
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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
- G09G3/3406—Control of illumination source
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
- H03K17/284—Modifications for introducing a time delay before switching in field effect transistor switches
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The application discloses a time sequence control system, which comprises a backlight power supply, a system on a chip, a core power supply and a switch unit; the system on chip is used for connecting the display system to provide a lighting signal and delay and output a switching signal according to the lighting signal; the movement power supply is connected with the system on chip; and the switch unit is connected with the output end of the core power supply, the input end of the backlight power supply and the output end of the system on chip and is used for controlling the conduction of the core power supply and the backlight power supply according to the switch signal.
Description
Technical Field
The application relates to the technical field of display, in particular to the technical field of TCON-less display screens, and particularly relates to a time sequence control system and a display panel.
Background
With the progress of display technology, TCON-less display screens are available on the market in order to further reduce the production cost of televisions. The TCON-less display screen is a display screen which removes a TCON module of a traditional liquid crystal display screen.
In the existing TCON-less driving architecture, a core board controls a backlight and a signal for controlling an Open Cell (a liquid crystal display panel to which electronic components such as a polarizer, a driving circuit, a flexible circuit board, a printed circuit board and the like are attached) to be separated, the backlight is usually powered on before the Open Cell is lighted, so that the Open Cell is in an unstable state at the moment of power on, a visual image is abnormal, and the Open Cell is determined to have a bad product.
Disclosure of Invention
The embodiment of the application provides a time sequence control system, which solves the problem of abnormal pictures caused by the fact that a backlight is powered on before a display panel in a TCON-less driving framework.
In a first aspect, the present application provides a timing control system, which includes a backlight power supply, a system on chip, a core power supply, and a switch unit; the system on chip is used for connecting the display system to provide a lighting signal and outputting a switch signal in a delayed manner according to the lighting signal; the core power supply is connected with the system on chip and used for supplying power to the time sequence control system; and the switch unit is connected with the output end of the core power supply, the input end of the backlight power supply and the output end of the system on chip and is used for controlling the conduction of the core power supply and the backlight power supply according to the switch signal.
In a first implementation form of the first aspect as such according to the first aspect, the switching signal lags the ignition signal by more than 500 ms.
In a second implementation form of the first aspect, based on the first implementation form of the first aspect, the switching unit is a field effect transistor; the grid of the field effect transistor is connected with the output end of the system on chip and used for accessing a switching signal; the input end of the field effect transistor is connected with the output end of the core power supply; the output end of the field effect transistor is connected with the input end of the backlight power supply.
In a third implementation manner of the first aspect, according to the first implementation manner of the first aspect, the system on chip includes a delay unit; the input end of the delay unit is used for accessing a lighting signal; the output end of the delay unit is used for outputting a switch signal.
In a fourth implementation manner of the first aspect, based on the first implementation manner of the first aspect, the switching unit is a triode; the base electrode of the triode is connected with the output end of the system on chip and used for accessing a switching signal; the input end of the triode is connected with the output end of the core power supply; the output end of the triode is connected with the input end of the backlight power supply.
In a second aspect, the present application provides a display device including the timing control system in any of the above embodiments.
Based on the second aspect, in the first implementation manner of the second aspect, the system on chip, the core power supply, and the switch unit are all disposed on a core circuit board, the core circuit board is provided with a first connection interface, and an input side of the first connection interface is electrically connected to the system on chip for accessing the lighting signal.
In a second implementation form of the second aspect, the display system includes a printed circuit board, a source driver, a liquid crystal display panel, and a flexible flat cable; the printed circuit board is provided with an input interface, the input interface is connected with one end of the flexible flat cable, and the other end of the flexible flat cable is connected with the output side of the first connecting interface; the output end of the printed circuit board is connected with the input end of the source driver; the output end of the source driver is connected with the input end of the liquid crystal display panel.
In a third implementation manner of the second aspect, the display system further includes a backlight module; the output end of the backlight power supply is electrically connected with the backlight module.
Based on the third implementation manner of the second aspect, in the fourth implementation manner of the second aspect, the core circuit board is further provided with a second connection interface, an input side of the second connection interface is connected with the output end of the switch unit, and an output side of the second connection interface is connected with the input end of the backlight power supply.
According to the time sequence control system provided by the embodiment of the application, the on-chip system outputs the switch signal after a certain time delay according to the lighting signal provided for the display system, the switch signal controls the switch unit to be conducted, at the moment, the core power supply provides the working power supply for the backlight power supply, the backlight power supply is ensured to be later than the power-on time sequence of the display system, and the phenomenon of abnormal pictures is solved.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a timing control system according to an embodiment of the present disclosure.
Fig. 2 is a timing diagram of a timing control system according to an embodiment of the present disclosure.
Fig. 3 is another schematic structural diagram of the timing control system according to the embodiment of the present application.
Fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 and fig. 2, the present embodiment provides a timing control System, which includes a backlight power supply 500, a System On Chip (SOC) 200, a core power supply 100, and a switch unit 400; the system-on-chip 200 is connected to the display system 300 to provide the lighting signal 210, and delay and output a switching signal 220 according to the lighting signal 210; the movement power supply 100 is connected with the system-on-chip 200 and is used for supplying power to the time sequence control system; and a switch unit 400 connected to the output terminal of the movement power supply 100, the input terminal of the backlight power supply 500, and the output terminal of the system-on-chip 200, for controlling the conduction between the movement power supply 100 and the backlight power supply 500 according to the switch signal 220.
Specifically, an output terminal of the movement power supply 100 is connected to a power supply input terminal of the system-on-chip 200, and a dc 12V working voltage is provided thereto; the other output end of the movement power supply 100 is connected with the backlight power supply 500 through the switch unit 400, and provides a direct-current 24V working voltage for the backlight power supply 500; the system-on-chip 200 outputs the lighting signal 210 for the display system 300, and the display system 300 can enter a preparation stage of picture display after receiving the lighting signal 210; after the system-on-chip 200 detects that the lighting signal 210 is output and a delay of a period of time T elapses, a pin of the system-on-chip 200 outputs a switching signal 220, and the switching signal 220 is used for controlling on and off of the switching unit 400; when the lighting signal 210 is output, the switch signal 220 controls the switch unit 400 to be turned on after time delay, so that the power-on time T of the backlight power supply 500 is delayed from the power-on time T of the display system 300; when the lighting signal 210 is not output, it indicates that the system does not need to display, and at this time, the switching signal 220 is not output, the switching unit 400 is in the off state, and the backlight power supply 500 is in the power-off state, so that power consumption can be saved for the system.
The lighting signal 210 may include, but is not limited to, a voltage signal, a control signal, and a data signal, and the on signal may be output according to, but not limited to, one of the voltage signals, one of the control signals, one of the data signals, or a combination of multiple signals, which is prior art and not described in detail.
As shown in fig. 2, in one embodiment, the switching signal 220 lags the ignition signal 210 by more than 500 ms.
Specifically, the lag time T is beneficial to ensuring the power-on timing of the backlight power supply 500 and the display system 300, so as to better solve the problem that the backlight is powered on before the display panel in the TCON-less driving architecture, which causes abnormal pictures.
In one embodiment, the switch unit 400 is a field effect transistor; the gate of the field effect transistor is connected to the output of the system-on-chip 200 for receiving the switching signal 220; the input end of the field effect transistor is connected with the output end of the movement power supply 100; the output terminal of the field effect transistor is connected to the input terminal of the backlight power supply 500.
Specifically, for controlling the on-off state of the switch unit 400 according to the switch signal 220, when the switch signal 220 is a low level signal, the switch unit 400 is controlled to be in a conducting state, at this time, the input end of the field effect transistor is the source electrode of the field effect transistor, and the output end of the field effect transistor is the drain electrode of the field effect transistor; on the contrary, when the switching signal 220 is a high level signal, the switching unit 400 is controlled to be in a conducting state, and at this time, the input terminal of the field effect transistor is the drain of the field effect transistor, and the output terminal of the field effect transistor is the source of the field effect transistor.
As shown in FIG. 3, in one embodiment, the system-on-chip 200 includes a delay unit 230; the input of the delay unit 230 is used to access the lighting signal 210; the output terminal of the delay unit 230 is used for outputting the switching signal 220.
Specifically, the system on chip 200 is a system on chip, and a delay unit 230 is disposed inside the system on chip, the delay unit 230 can delay and output another signal according to a certain signal, and a specific time T of the delay can be precisely controlled by a processing unit of the system on chip 200, which is known in the art and not described in detail.
In one embodiment, the switch unit 400 is a transistor; the base of the triode is connected with the output end of the system-on-chip 200 and is used for accessing a switching signal 220; the input end of the triode is connected with the output end of the movement power supply 100; the output terminal of the triode is connected with the input terminal of the backlight power supply 500.
Specifically, in terms of controlling the on-off state of the switch unit 400 according to the switch signal 220, when the switch signal 220 is a low level signal, the switch unit 400 is controlled to be in a conducting state, at this time, the input end of the triode is the emitter of the triode, and the output end of the triode is the collector of the triode; on the contrary, when the switching signal 220 is a high level signal, the switching unit 400 is controlled to be in a conducting state, at this time, the input terminal of the transistor is the collector of the transistor, and the output terminal of the transistor is the emitter of the transistor.
In one embodiment, as shown in fig. 4, the present application provides a display device including the timing control system in any one of the above embodiments.
Specifically, the timing control system can be applied, but not limited, in the display technology field, and when the timing control system is applied in the display technology field and is used as a component of a display device, the display device can also solve the problem that the backlight is powered on before the display panel in the TCON-less driving architecture, which causes abnormal pictures, and can reduce the power consumption of the backlight power supply 500.
As shown in fig. 4, in one embodiment, the system on chip 200, the core power supply 100 and the switch unit 400 are disposed on a core circuit board 600, the core circuit board 600 is disposed with a first connection interface 610, and an input side of the first connection interface 610 is electrically connected to the system on chip 200 for accessing the lighting signal 210.
Specifically, the system-on-chip 200, the core power supply 100, and the switch unit 400 are all disposed on a core circuit board 600, which is beneficial to reducing the occupied space and improving the integration level.
As shown in fig. 4, in one embodiment, the display system 300 includes a printed circuit board 320, a source driver 330, a liquid crystal display panel 340, and a Flexible Flat Cable 310 (FFC); the printed circuit board 320 is provided with an input interface 360, the input interface 360 is connected with one end of the flexible flat cable 310, and the other end of the flexible flat cable 310 is connected with the output side of the first connection interface 610; the output terminal of the printed circuit board 320 is connected to the input terminal of the source driver 330; an output terminal of the source driver 330 is connected to an input terminal of the liquid crystal display panel 340.
Specifically, the system-on-chip 200 transmits the lighting signal to the printed circuit board 320 through the flexible flat cable 310; here, the liquid crystal display panel 340 is an Open Cell type liquid crystal display panel.
As shown in fig. 4, in one embodiment, the display system 300 further includes a backlight module 350; the output terminal of the backlight power supply 500 is electrically connected to the backlight module 350.
As shown in fig. 4, in one embodiment, the movement circuit board 600 is further provided with a second connection interface 620, an input side of the second connection interface 620 is connected with an output terminal of the switch unit 400, and an output side of the second connection interface 620 is connected with an input terminal of the backlight power supply 500.
Specifically, the second connection interface 620 of the movement circuit board 600 is electrically connected to the input terminal of the backlight power supply 500, and is configured to output a dc voltage.
As shown in fig. 4, in one embodiment, the system-on-chip 200 provides a digital voltage DVDD and an analog voltage AVDD to the source driver 330 through the flexible flat cable 310 and the printed circuit board 320.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The timing control system provided by the embodiment of the present application is introduced in detail, and a specific example is applied to explain the principle and the implementation manner of the present application, and the description of the embodiment is only used to help understanding the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A timing control system, comprising:
a backlight power supply;
the system on chip is used for connecting the display system to provide a lighting signal and outputting a switch signal in a delayed manner according to the lighting signal;
the movement power supply is connected with the system on chip and used for supplying power to the time sequence control system; and
and the switch unit is connected with the output end of the core power supply, the input end of the backlight power supply and the output end of the system on chip and is used for controlling the conduction of the core power supply and the backlight power supply according to the switch signal.
2. The timing control system of claim 1, wherein the switching signal lags the ignition signal by more than 500 ms.
3. The timing control system of claim 1, wherein the switching unit is a field effect transistor;
the grid electrode of the field effect transistor is connected with the output end of the system on chip and used for accessing the switching signal; the input end of the field effect transistor is connected with the output end of the movement power supply; and the output end of the field effect transistor is connected with the input end of the backlight power supply.
4. The timing control system of claim 1, wherein the system-on-chip comprises a delay unit;
the input end of the delay unit is used for accessing the lightening signal; and the output end of the delay unit is used for outputting the switch signal.
5. The timing control system according to claim 1, wherein the switching unit is a triode;
the base electrode of the triode is connected with the output end of the system on chip and used for accessing the switching signal; the input end of the triode is connected with the output end of the movement power supply; and the output end of the triode is connected with the input end of the backlight power supply.
6. A display device comprising the timing control system according to any one of claims 1 to 5.
7. The display device according to claim 6, wherein the system on chip, the movement power supply, and the switch unit are all disposed on a movement circuit board, the movement circuit board is provided with a first connection interface, and an input side of the first connection interface is electrically connected to the system on chip and is used for accessing the lighting signal.
8. The display device according to claim 7, wherein the display system comprises a printed circuit board, a source driver, a liquid crystal display panel, and a flexible flat cable;
the printed circuit board is provided with an input interface, the input interface is connected with one end of the flexible flat cable, and the other end of the flexible flat cable is connected with the output side of the first connecting interface;
the output end of the printed circuit board is connected with the input end of the source driver; and the output end of the source driver is connected with the input end of the liquid crystal display panel.
9. The display device of claim 8, wherein the display system further comprises a backlight module; the output end of the backlight power supply is electrically connected with the backlight module.
10. The display device according to claim 9, wherein the movement circuit board is further provided with a second connection interface, an input side of the second connection interface is connected with an output end of the switch unit, and an output side of the second connection interface is connected with an input end of the backlight power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202013.2A CN111277255A (en) | 2020-03-20 | 2020-03-20 | Time sequence control system and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202013.2A CN111277255A (en) | 2020-03-20 | 2020-03-20 | Time sequence control system and display panel |
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| CN111277255A true CN111277255A (en) | 2020-06-12 |
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| CN202010202013.2A Pending CN111277255A (en) | 2020-03-20 | 2020-03-20 | Time sequence control system and display panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112017588A (en) * | 2020-08-31 | 2020-12-01 | 深圳市艾比森光电股份有限公司 | Energy-saving method for LED display screen and related device |
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| CN101441860A (en) * | 2008-12-22 | 2009-05-27 | 三一重工股份有限公司 | Control device for starting LCD power supply |
| TW201546796A (en) * | 2014-06-11 | 2015-12-16 | Phistek Inc | Backlight control apparatus of LAN/USB LCD display |
| CN108574260A (en) * | 2017-03-10 | 2018-09-25 | 厦门歌乐电子企业有限公司 | A kind of backlight module power protecting circuit and mobile unit |
| CN109461415A (en) * | 2018-11-12 | 2019-03-12 | 惠科股份有限公司 | Display panel's drive circuit and display panel |
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2020
- 2020-03-20 CN CN202010202013.2A patent/CN111277255A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101154353A (en) * | 2006-09-29 | 2008-04-02 | 群康科技(深圳)有限公司 | LCD and its driving circuit |
| CN101441860A (en) * | 2008-12-22 | 2009-05-27 | 三一重工股份有限公司 | Control device for starting LCD power supply |
| TW201546796A (en) * | 2014-06-11 | 2015-12-16 | Phistek Inc | Backlight control apparatus of LAN/USB LCD display |
| CN108574260A (en) * | 2017-03-10 | 2018-09-25 | 厦门歌乐电子企业有限公司 | A kind of backlight module power protecting circuit and mobile unit |
| CN109461415A (en) * | 2018-11-12 | 2019-03-12 | 惠科股份有限公司 | Display panel's drive circuit and display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112017588A (en) * | 2020-08-31 | 2020-12-01 | 深圳市艾比森光电股份有限公司 | Energy-saving method for LED display screen and related device |
| CN112017588B (en) * | 2020-08-31 | 2021-11-26 | 深圳市艾比森光电股份有限公司 | Energy-saving method for LED display screen and related device |
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