CN108305592B - Synchronous output driving unit, display panel and display device - Google Patents
Synchronous output driving unit, display panel and display device Download PDFInfo
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- CN108305592B CN108305592B CN201810151336.6A CN201810151336A CN108305592B CN 108305592 B CN108305592 B CN 108305592B CN 201810151336 A CN201810151336 A CN 201810151336A CN 108305592 B CN108305592 B CN 108305592B
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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Abstract
The application discloses a driving unit, a display panel and a display device capable of synchronously outputting, which comprise a control module and a voltage output module; the control module is used for delaying for a preset time length and then performing enable control on the voltage output module after receiving a starting signal; the voltage module is used for outputting a voltage signal after receiving the signal of the control module enabling control. According to the technical scheme provided by the embodiment of the application, the control module controls the generation of the enable signal and further controls the time of the voltage output unit for outputting the voltage, so that the purposes of delaying voltage output and synchronously outputting the voltage and the source signal are achieved.
Description
Technical Field
The present disclosure relates generally to the field of liquid crystal display, and more particularly, to a driving unit, a display panel, and a display device for synchronous output.
Background
Direct current residue is always a difficult problem in the field of liquid crystal display, and can cause a series of problems such as residual image, residual shadow, abnormal display of first on/off and the like. When there is a residue, there is a voltage difference between pixels once the reference voltage is input to the voltage output, and abnormal display occurs. However, in the normal power-on sequence, the source output is generally output to the pixels of the panel only about 200ms after VIN is powered on due to the problem that the control module downloads the program from the EEPROM, but the voltage output is generated from the power module and is generally output to the panel about 10ms after VIN is powered on. Therefore, when the computer is started, the voltage output and the source electrode are not synchronously output, and the inherent direct current residue on the pixel can cause abnormal display when the computer is started, so that defects like a flashing horizontal black line when the computer is started exist in many products at present.
In order to solve the problem of asynchronous output between the voltage output and the source when starting up, the current common driving circuit design delays the voltage output through alternating current delay, but the delay circuit has several problems which are difficult to solve: firstly, directly performing alternating current delay on voltage output can influence the driving capability of the voltage output; secondly, the alternating current delay is easy to lose efficacy when the first switch is started and shut down quickly, and the delay time can be greatly reduced; in addition, because some oxidation panels use negative voltage output, when the voltage output is delayed, the output is more unstable due to the leakage problem of the alternating current delayed field effect transistor.
In summary, it is difficult for the conventional driving circuit to output the voltage output and the source completely synchronously from the device to the design.
Disclosure of Invention
In view of the above-mentioned drawbacks or deficiencies in the prior art, it is desirable to provide a driving unit, a display panel and a display device with synchronized output.
In a first aspect, a synchronous output driving unit is provided, which includes a control module and a voltage output module;
the control module is used for delaying for a preset time length and then performing enable control on the voltage output module after receiving a starting signal;
the voltage module is used for outputting a voltage signal after receiving the signal of the control module enabling control.
In a second aspect, a driving unit for synchronous output includes a control module, a voltage output module and a source output module, wherein a switch is disposed between the voltage output module and the source output module;
the control module is used for controlling the switch to be opened after receiving the starting signal and controlling the switch to be kept closed when not receiving the starting signal.
In a third aspect, a display panel is provided, comprising the driving unit for synchronizing output as described above.
In a fourth aspect, a display device is provided, comprising the display panel as described above.
According to the technical scheme provided by the embodiment of the application, the control module controls the generation of the enable signal and further controls the time of the voltage output unit for outputting the voltage, so that the purposes of delaying voltage output and synchronously outputting with the source signal are achieved; on the other hand, the voltage output module and the source output module are connected through the first switch, the switch is turned on and off through a signal sent by the control module to realize the unification of the states of the two modules, and the subsequent synchronous output of the voltage and the source signal can effectively avoid the poor startup condition caused by the residual direct current.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1-3 are schematic diagrams of a synchronous output driving unit according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, an embodiment of the invention provides a synchronous output driving unit,
the device comprises a control module and a voltage output module;
the control module is used for delaying for a preset time length and then performing enable control on the voltage output module after receiving a starting signal;
the voltage module is used for outputting a voltage signal after receiving the signal of the control module enabling control.
In the embodiment, the generation of the enable signal is increased through the control module, the enable control signal is sent to control the output of the voltage after the set time, the control module comprises a time schedule controller, and the time schedule controller is used for setting and controlling the preset delay time; the voltage output module controls voltage delay output according to the enable signal by sending the enable signal of high level or low level, and the voltage delay output after receiving the enable signal of high level or low level can be determined according to actual requirements; the method can delay voltage output, so that the voltage and the source electrode signal are synchronously output, and the time length of voltage delay is controlled by the control module.
Further, the voltage output module comprises a power module and a voltage amplification module, the enable signal generation module is connected to the power module, and the power module is used for outputting an initial voltage to the voltage amplification module after receiving a signal controlled by the enable of the control module. The voltage output module comprises a power supply module and a voltage amplification module, and the control module can be connected to any one of the modules, as shown in fig. 1, the control module is connected with the power supply module, and the power supply module generates voltage and outputs an initial voltage signal when receiving an enable signal.
Further, the voltage output module comprises a power module and a voltage amplification module, and the power module is used for outputting an initial voltage to the voltage amplification module;
the voltage amplification module is used for amplifying the initial voltage and outputting a voltage signal after receiving the signal which is controlled by the control module. In this embodiment, the control module is connected to the voltage amplification module, as shown in fig. 2, the control module is connected to the voltage amplification module, and the voltage amplification module amplifies the received initial voltage and outputs the amplified voltage signal when receiving the enable signal.
As shown in fig. 3, an embodiment of the present invention further provides a driving unit for synchronous output, including a control module, a voltage output module, and a source output module, where a switch is disposed between the voltage output module and the source output module;
the control module is used for controlling the switch to be opened after receiving the starting signal and controlling the switch to be kept closed when not receiving the starting signal.
The driving unit in this embodiment connects the voltage output module and the source output module through the switch, and when the control module receives the power-on signal, the control module controls the switch to be turned on according to actual requirements, and when the power-on signal is not received, the switch is kept to be turned on, so that the source output module and the voltage output module are connected and in the same state.
The control module is also used for sending an output signal to the data driving integrated circuit module when receiving a starting signal;
the data driving integrated circuit module is used for receiving the output signal and controlling the source electrode output module to output a source electrode signal.
When the control module receives the starting signal, the driving integrated circuit module needs to control the source electrode output module to output the source electrode signal, and the switch is switched off at the moment, so that the output of the source electrode signal is not influenced.
In order to ensure synchronous output of the source signal and the voltage signal, before the source signal is not output, the control module controls the switch to be closed, so that the voltage output module is connected with the source output module, the states of the voltage output module and the source output module are synchronous, and synchronous output of the source signal and the voltage signal is realized in a subsequent lighting process.
Further, the switch is arranged on the data driving integrated circuit module, and the output end of the data driving integrated circuit module is connected to the voltage output module through the switch. There are various switch connection modes between the voltage output module and the source output module, and in this embodiment, a switch is provided on the circuit at the output end of the data driving integrated circuit module to realize connection control.
Further, the source output module, the voltage output module and the grounding module are integrated on a panel, and the switch is arranged on the panel. This embodiment has still provided a connected mode, because source output module, voltage output module and ground connection module all set up on the panel, can be directly be provided with the switch on the panel between voltage output module and the source output module, need not to change the internal output circuit in the data drive integrated circuit module, and the realization mode is simpler.
The control module is used for controlling the voltage output module and the source electrode output module to be disconnected and grounded when receiving the starting signal, and controlling the voltage output module and the source electrode output module to be grounded when not receiving the starting signal. When the control module does not receive the starting signal, the voltage output module and the source electrode output module are connected and grounded at the same time, and the two modules are in the same state, so that synchronous output of voltage and source electrode signals is guaranteed. Wherein the corresponding function can be realized by one synchronization signal line.
In the embodiment, the voltage output module and the source electrode output module are connected, so that the two modules are ensured to be in the same state before the source electrode signal is output, the synchronous output of the voltage and the source electrode signal is realized, and the condition of poor startup caused by direct current residual can be effectively avoided.
The embodiment of the invention also provides a display panel which comprises the synchronous output driving unit.
The embodiment of the invention also provides a display device which comprises the display panel.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (8)
1. The driving unit for synchronous output is characterized by comprising a control module and a voltage output module;
the control module is used for delaying for a preset time length and then performing enable control on the voltage output module after receiving a starting signal;
the voltage output module is used for outputting a voltage signal after receiving a signal which is controlled by the control module; the voltage output module comprises a power module and a voltage amplification module, and the power module is used for outputting initial voltage to the voltage amplification module after receiving the signal controlled by the control module.
2. The driving unit for synchronous output is characterized by comprising a control module and a voltage output module;
the control module is used for delaying for a preset time length and then performing enable control on the voltage output module after receiving a starting signal;
the voltage output module is used for outputting a voltage signal after receiving a signal which is controlled by the control module; the voltage output module comprises a power supply module and a voltage amplification module, and the power supply module is used for outputting initial voltage to the voltage amplification module;
the voltage amplification module is used for amplifying the initial voltage and outputting a voltage signal after receiving the signal which is controlled by the control module.
3. A synchronous output driving unit is characterized by comprising a control module, a voltage output module and a source electrode output module, wherein a switch is arranged between the voltage output module and the source electrode output module;
the control module is used for controlling the switch to be opened after receiving the starting signal and controlling the switch to be kept closed when not receiving the starting signal,
the source electrode output module and the voltage output module are integrated on a panel, and the switch is arranged on the panel.
4. The synchronous output drive unit according to claim 3, further comprising a data driving integrated circuit module, wherein the control module is further configured to send an output signal to the data driving integrated circuit module when receiving a power-on signal;
the data driving integrated circuit module is used for receiving the output signal and controlling the source electrode output module to output a source electrode signal.
5. The synchronous output driver unit of claim 4, wherein the switch is disposed on the data driving IC module, and the output terminal of the data driving IC module is connected to the voltage output module through the switch.
6. The synchronous output driving unit according to claim 3, further comprising a ground interface, wherein the control module is configured to control the voltage output module and the source output module to be disconnected from ground when receiving the power-on signal, and control the voltage output module and the source output module to be grounded when not receiving the power-on signal.
7. A display panel comprising the synchronous-output driving unit according to any one of claims 1 to 6.
8. A display device characterized by comprising the display panel according to claim 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810151336.6A CN108305592B (en) | 2018-02-14 | 2018-02-14 | Synchronous output driving unit, display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810151336.6A CN108305592B (en) | 2018-02-14 | 2018-02-14 | Synchronous output driving unit, display panel and display device |
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| CN108305592B true CN108305592B (en) | 2021-01-22 |
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| CN109410859B (en) * | 2018-11-21 | 2021-04-02 | 惠科股份有限公司 | Display device, driving method and display |
| CN110444174A (en) * | 2019-06-11 | 2019-11-12 | 惠科股份有限公司 | A kind of driving method and driving circuit of display panel |
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| JP3617498B2 (en) * | 2001-10-31 | 2005-02-02 | 三菱電機株式会社 | Image processing circuit for driving liquid crystal, liquid crystal display device using the same, and image processing method |
| KR20040008260A (en) * | 2002-07-17 | 2004-01-28 | 기가시스네트(주) | A Color Picture Display Apparatus and Method |
| KR20050080608A (en) * | 2004-02-10 | 2005-08-17 | 엘지전자 주식회사 | Apparatus and method for adjusting common electode voltage in liquid crystal display |
| CN100343731C (en) * | 2004-08-09 | 2007-10-17 | 友达光电股份有限公司 | Liquid crystal display and method for improving picture flash in turn-on process |
| CN101377907B (en) * | 2007-08-31 | 2013-07-17 | 北京京东方光电科技有限公司 | Delay device for analog power supply signal |
| CN102467862B (en) * | 2010-11-17 | 2014-08-27 | 京东方科技集团股份有限公司 | Voltage regulation method and device of liquid crystal display panel |
| CN103065599A (en) * | 2013-01-06 | 2013-04-24 | 友达光电股份有限公司 | Liquid crystal display capable of eliminating power off remained shadow |
| CN104616632B (en) * | 2015-02-16 | 2017-11-17 | 彩优微电子(昆山)有限公司 | A kind of liquid crystal display drive circuit and driving method for preventing lower electric ghost |
| CN104680996B (en) * | 2015-03-10 | 2017-08-15 | 深圳市华星光电技术有限公司 | A kind of VCOM generative circuits and liquid crystal display |
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