CN109509451B - Display device - Google Patents
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- CN109509451B CN109509451B CN201811577368.9A CN201811577368A CN109509451B CN 109509451 B CN109509451 B CN 109509451B CN 201811577368 A CN201811577368 A CN 201811577368A CN 109509451 B CN109509451 B CN 109509451B
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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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134345—Subdivided pixels, e.g. for grey scale or redundancy
- G02F1/134354—Subdivided pixels, e.g. for grey scale or redundancy the sub-pixels being capacitively coupled
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application discloses a display device, which comprises a display panel and a discharge assembly, wherein the display panel comprises a plurality of pixels which are arranged in an array mode, and the pixels comprise pixel capacitors; the discharging component comprises a discharging signal source and a discharging circuit, the discharging signal source is set to generate a discharging signal to enable electrodes in the same pixel capacitor to be short-circuited when the display device is shut down, and the discharging circuit is connected with at least one electrode in the pixel capacitor to release residual charges in the pixel capacitor. The technical scheme of the application is favorable for eliminating shutdown ghost shadow.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device.
Background
The statements herein merely provide background information related to the present application and may not necessarily constitute prior art. When the Image displayed by the display device changes, the previous Image often cannot be switched or disappeared immediately, but there is a gradual change process, i.e. a so-called ghost (Sticking Image) phenomenon occurs.
Especially when the display device is turned off, the display effect of the display device is deteriorated due to the occurrence of the shutdown afterimage.
Disclosure of Invention
The main objective of the present application is to provide a display device, which realizes the elimination of shutdown ghost.
In order to achieve the above object, the display device provided in the present application includes a display panel and a discharge assembly, wherein the display panel includes a plurality of pixels arranged in an array, and the pixels include pixel capacitors; the discharge assembly comprises a discharge signal source and a discharge circuit, the discharge signal source is set to generate a discharge signal to enable electrodes in the same pixel capacitor to be short-circuited when the display device is shut down, and the discharge circuit is connected with at least one electrode in the pixel capacitor to release residual charges in the pixel capacitor.
Optionally, the discharge circuit includes a discharge switching device, a gate electrode of the discharge switching device is connected to the discharge signal source, and a drain electrode of the discharge switching device is connected to at least one electrode of the pixel capacitor; when the discharge signal source generates the discharge signal, the discharge switching device is switched on to release residual charges in the pixel capacitor; otherwise, the discharge switching device is turned off to insulate the discharge circuit from the pixel capacitance.
Optionally, the electrode in the pixel capacitance comprises a pixel electrode; the pixel comprises a pixel switching device, a gate electrode of the pixel switching device is connected with a scanning line in the display panel, a drain electrode of the pixel switching device is connected with a data line in the display panel, and a source electrode of the pixel switching device is connected with the pixel electrode.
Optionally, the electrode in the pixel capacitance comprises a common electrode; and the drain electrode of the discharge switching device is connected with the common electrode, and the source electrode of the discharge switching device is connected with the data line.
Optionally, the discharge switching devices and the data lines are arranged in a one-to-one correspondence.
Optionally, the pixel switching device is a negative channel metal oxide semiconductor thin film transistor; the discharge switching device is a positive channel metal oxide semiconductor thin film transistor.
Optionally, the discharge circuit further includes a signal processing circuit board, and the signal processing circuit board is disposed on the display panel.
Optionally, the signal processing circuit board includes a connection switching device, a gate electrode of the connection switching device is connected to the discharge signal source, and a source electrode of the connection switching device is grounded.
Optionally, the discharge circuit further includes a core board, the core board is disposed on a backlight module of the display device, and the backlight module and the display panel are stacked.
Optionally, the discharge circuit further includes a connector connected between the signal processing circuit board and the core board.
In the technical scheme of the application, the display device comprises a display panel and a discharge assembly, wherein the display panel comprises a plurality of pixels which are arranged in an array mode, and the pixels comprise pixel capacitors; the discharging component comprises a discharging signal source and a discharging circuit, the discharging signal source is set to generate a discharging signal to enable electrodes in the same pixel capacitor to be short-circuited when the display device is shut down, and the discharging circuit is connected with at least one electrode in the pixel capacitor to release residual charges in the pixel capacitor. By arranging the discharge component in the display device, a discharge channel is provided for residual charges in pixel capacitors of the display panel, and the residual charges are discharged in time. When the display device is shut down, under the control of the discharge signal, the electrodes of the pixel capacitor are in short circuit, one part of residual charges in the pixel capacitor after short circuit are neutralized, and further, the other part of residual charges which cannot be neutralized are conducted away through the discharge circuit connected with at least one electrode, so that a residual electric field generated by the residual charges is eliminated, the shutdown ghost phenomenon is avoided, and the display effect of the display device is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of another embodiment of a display device according to the present application;
fig. 3 is a schematic structural diagram of a signal processing circuit board and a connector in another embodiment of the display device of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the 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.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
Hereinafter, a liquid crystal display device will be taken as an example to describe the technical solution of the present application in detail, and it can be understood by those skilled in the art that, for other types of display devices, corresponding discharge components may be arranged according to the characteristics of the display device to construct a discharge path to eliminate the residual electric field, thereby avoiding the occurrence of shutdown ghost. In one example, the lcd device includes a backlight module and a display panel, wherein the backlight module is configured to generate backlight, the display panel is disposed in an overlapping manner with respect to the backlight module, the display panel includes a plurality of pixels, and a pixel capacitor of each pixel is applied with a certain electric field by an action of a pixel switching device on an array substrate of the display panel, so as to control a deflection of liquid crystal in the display device, thereby controlling a transmittance of the backlight and realizing a certain image display. When the liquid crystal display device is turned off, different electrodes of the pixel capacitor have different discharge paths, and the signals for controlling the discharge of the electrodes are different, so that a large amount of residual charges exist in the display panel, the residual charges generate a residual electric field to deflect the liquid crystal, and the transmission of backlight cannot be completely blocked to generate a residual image phenomenon. In order to weaken the shutdown afterimage in the display device, when the shutdown signal of the display device is obtained, the backlight module is firstly closed, that is, the backlight of the display device is closed.
The application provides a display device, through setting up the subassembly that discharges, in time release display panel's residual charge eliminates the shutdown ghost shadow to display device's display effect is improved.
In an embodiment of the present application, as shown in fig. 1, the display device includes a display panel 100 and a discharge element 200, where the display panel 100 includes a plurality of pixels arranged in an array, and each pixel includes a pixel capacitor; the discharge component 200 includes a discharge signal source 210 and a discharge circuit 220, the discharge signal source 210 is configured to generate a discharge signal to short-circuit electrodes in the same pixel capacitor when the display device is turned off, and the discharge circuit 220 is connected to at least one electrode in the pixel capacitor to release residual charges in the pixel capacitor.
Specifically, the discharge signal source 210 may be directly connected to a pixel capacitor in the display panel, or connected to the pixel capacitor through another switching device, so as to control a connection state between electrodes in the pixel capacitor, which will be described in detail later. When the display device is turned off, the discharge signal source 210 generates a discharge signal to short-circuit the electrodes in the same pixel capacitor, and at least a part of the charges in the pixel capacitor will be neutralized. For the other part of the charge which is not neutralized, the discharge circuit 220 connected with at least one electrode of the pixel capacitor is arranged to discharge so that the net charge in the pixel capacitor is zero or basically zero, the residual electric field in the pixel capacitor is eliminated, and the phenomenon that the liquid crystal cannot be deflected to a required angle to generate residual shadow is avoided. When judging whether the display device is turned off, the power supply signal of the display device can be compared with a preset threshold value, and the preset threshold value can be set to be a value larger than zero because the power supply signal needs a certain time to descend when the display device is turned off. Specifically, when the power supply signal is less than or equal to the preset threshold, the display device is considered to be turned off, and the discharge signal source 210 is controlled to generate a discharge signal to short-circuit the electrodes of the same pixel capacitor in the display panel, and the preset threshold greater than zero is set as a determination criterion, so that the short-circuit process of the electrodes in the pixel capacitor can be properly accelerated, and the time required for the disappearance of the shutdown ghost image is reduced. The discharge circuit 220 may be connected to a constant voltage signal source, a common signal source, or the like or directly Grounded (GND) to provide a discharge path for residual charges in the display panel and discharge the residual charges in time. In the display device, the discharge circuit can be independently arranged, and the independently arranged discharge circuit often has better discharge capacity, so that the discharge effect of the display device is improved, and the generation of shutdown ghost shadow is avoided. Alternatively, the discharge circuit may be configured by using circuit components and the like existing in the display device, so that the existing components in the display device are fully used, the installation cost of the discharge circuit is reduced, and the cost of the display device is further reduced.
In this embodiment, the display device includes a display panel 100 and a discharge element 200, the display panel includes a plurality of pixels arranged in an array, and the pixels include pixel capacitors; the discharge component 200 includes a discharge signal source 210 and a discharge circuit 220, the discharge signal source 210 is configured to generate a discharge signal to short-circuit electrodes in the same pixel capacitor when the display device is turned off, and the discharge circuit 220 is connected to at least one electrode in the pixel capacitor to release residual charges in the pixel capacitor. By providing the discharge device 200 in the display apparatus, a discharge path is provided for the residual charges in the pixel capacitors of the display panel, and the residual charges are discharged in time. When the display device is shut down, under the control of the discharge signal, the electrodes of the pixel capacitor are in short circuit, one part of residual charges in the pixel capacitor after short circuit are neutralized, and further, the other part of residual charges which cannot be neutralized are conducted away through the discharge circuit connected with at least one electrode, so that a residual electric field generated by the residual charges is eliminated, the shutdown ghost phenomenon is avoided, and the display effect of the display device is improved.
In another embodiment of the present application, as shown in fig. 2, there is a specific way to arrange the discharge assembly. The display panel includes a plurality of pixels 110, a plurality of data lines 120, a plurality of scan lines 130 (only one is shown), and a plurality of common lines (not shown). The plurality of pixels 110 are arranged in a rectangular array, and each pixel includes a pixel capacitor 111 and a pixel switching device 112 for controlling charging and discharging of the pixel capacitor 111. The pixel switching device 112 is typically a Thin Film Transistor (TFT), and in this embodiment, the pixel switching device 112 will be described in detail as an example of a negative channel metal oxide semiconductor (NMOS) TFT. The gate electrode of the pixel switching device 112 is connected to the scan line 130 in the display panel, the drain electrode of the pixel switching device 112 is connected to the data line 120 in the display panel, and the source electrode of the pixel switching device 112 is connected to the pixel electrode in the pixel capacitor 111. The display panel is generally driven by line-by-line scanning, and under the action of a scanning signal on the scanning line 130, specifically, when the scanning signal is in a high level state, the pixel switching device 112 is turned on, and the source electrode and the drain electrode of the pixel switching device 112 are conducted, so that a data signal on the data line 120 connected to the drain electrode of the pixel switching device 112 is output to a pixel electrode of the pixel capacitor 111 in the corresponding pixel 110 through the pixel switching device 112, thereby charging the pixel capacitor 111. The electrodes in the pixel capacitor 111 further include a common electrode, the common electrode may be connected to a common signal source through a common line on the display panel, the common signal source generates and outputs a common signal, and under the action of an electric field between the pixel electrode and the common electrode, liquid crystals at corresponding positions are deflected to adjust a transmittance of a backlight generated by the backlight module, thereby obtaining a desired display gray scale. Generally, the display panel includes three pixels, namely, a red pixel, a green pixel and a blue pixel, at least one of the red pixel, the green pixel and the blue pixel forms a pixel group, and the pixel group displays a color picture under the action of a spatial color mixing principle.
In this embodiment, an Output all-on control (XON) signal is selected as a discharge signal, and when the display device is turned off, the XON signal controls operations of respective corresponding circuit components to release residual charges in the display panel, so as to avoid the occurrence of a shutdown ghost. The XON signal has the following characteristics: when the XON signal is in a low state, all other signals are forced to be pulled high. That is, when the display device is turned off, the XON signal is in a low level state, and all other signals in the display panel are in a high level state at this time, and in particular, all the scanning signals on the scanning lines 130 are in a high level state, the pixel switching device 112 in the pixel, i.e., the NMOS TFT, is in a conducting state, and the source electrode and the drain electrode thereof are conducting; when the display device is in a normal operation state, the XON signal is in a high level state, and the scan signal on the scan line 130 is generated by a shift register or the like of the display device, and the display panel is scanned line by line to drive the display of the picture without interference.
As shown in fig. 2, the discharge circuit 220 of the discharge assembly 200 includes a discharge switching device 221, a gate electrode of the discharge switching device 221 is connected to a source of a discharge signal, and a drain electrode of the discharge switching device 221 is connected to at least one electrode of the pixel capacitor 111. In the present embodiment, the discharge switching device 221 is a positive channel metal oxide semiconductor (PMOS) TFT. The discharge signal source 210 generates a discharge signal, and when the display device is turned off, that is, the XON signal is in a low level state, a discharge switching device, that is, a PMOS TFT is turned on, thereby generating a discharge path; when the display device is in a normal operation state, i.e. the XON signal is in a high level state, the discharge switch device is turned off, and the discharge circuit 220 and the pixel capacitor 111 are insulated from each other, so as to prevent the normal display of the picture from being interfered.
Alternatively, the drain electrode of the discharge switching device 221 is connected to the common electrode in the pixel capacitor 111, and the source electrode of the discharge switching device 221 is connected to the data line 120. That is to say, the data line 120 is connected to the common signal source through the discharging switching device 221, when the discharging switching device 221 is in a conducting state, the common electrode and the pixel electrode in the pixel capacitor 111 are both connected to the common signal source, that is, the electrode of the same pixel capacitor 111 is short-circuited, at least a part of the residual charges will be neutralized, and the other part of the residual charges is conducted away under the action of the common signal Vcom, so that the fast discharging is realized, and the occurrence of shutdown ghost is avoided.
In the embodiment shown in fig. 2, the discharge switching devices 221 are arranged in one-to-one correspondence with the data lines 120, that is, a discharge switching device 221 is arranged for each data line 120 and connected to a common signal source, so that all the pixel capacitors 111 connected to the data line 120 can be discharged through the discharge switching device 221. In this arrangement, all the pixels on the same column are connected to the same data line, and the pixels on different columns are connected to different data lines, so that the residual charges can be discharged along the corresponding data line of the column, and the existing circuit arrangement can be fully utilized to realize the connection of the discharge switching devices, and the circuit modification is simple. A plurality of discharging paths can be further constructed by the arrangement of the data lines and the discharging switch device, so that the discharging efficiency is improved, and the generation of residual shadows is avoided. Moreover, the discharge of the pixels of each column is substantially synchronized and uniform, so that the disappearance of the image is uniform after the entire display device is turned off.
Optionally, the discharge circuit further comprises a signal processing circuit board, and the signal processing circuit board is arranged on the display panel. Specifically, the signal processing circuit board may be integrated on the display panel, process a display signal and the like from the front end, and output corresponding display data to the scan lines and the data lines on the display panel to drive the display of the picture. The signal processing circuit board may specifically include a scan driving chip connected to the scan line, a data driving chip connected to the data line, and a timing control chip for controlling the operation of the scan driving chip and the data driving chip. The signal processing circuit board is used as a part of the discharge circuit, the existing circuit components in the display panel can be fully utilized to release residual charges, and all the residual charges obtained through the data lines are concentrated on the signal processing circuit board to be released, so that the cost of the display panel is reduced. Particularly, for a large-sized display device, two or more signal processing circuit boards may be disposed on the display panel to ensure data transmission control, and accordingly, data lines in different areas on the display panel may be connected to different signal processing circuit boards, and a discharge path is added to avoid the occurrence of shutdown ghost.
As shown in fig. 3, the signal processing circuit board includes a connection switching device 231, a gate electrode of the connection switching device 231 is connected to the discharge signal source, and in the present embodiment, the gate electrode of the connection switching device 231 is controlled by an XON signal, and a source electrode of the connection switching device 231 is Grounded (GND). Specifically, the connection switch device 231 may be a PMOS TFT, and when the display apparatus is turned off, that is, the XON signal is in a low level state, the connection switch device 231 is in a conducting state, that is, the source electrode and the drain electrode of the connection switch device 231 are conducted, and since the data line is also connected to the common signal source, the residual charges on the data line are guided to the signal processing circuit board.
The discharge circuit further comprises a core board, the core board is arranged on a backlight module of the display device, and the backlight module and the display panel are arranged in a stacked mode. Since the signal processing circuit board is usually directly integrated on the display panel, and the electrical connection between the signal processing circuit board and the outside is relatively complicated, if the residual charges are directly guided to the outside of the display device through the signal processing circuit board, the connection of the display panel may be complicated, which is not favorable for the integration of the signal processing circuit board. In the display device, the signal processing circuit board is usually connected to a core board in the backlight module, etc. to process the display signal from the outside and drive the display panel to display a certain image. Therefore, in this embodiment, the core board in the backlight module is introduced into the discharging circuit, so as to further guide the residual charges on the signal processing circuit board to the core board, that is, when the display device is turned off, the electrodes of the same pixel capacitor on the display panel are short-circuited, wherein a part of the charges are neutralized, another part of the charges are guided to the signal processing circuit board of the display panel through the data line, and the signal processing circuit board further guides the residual charges to the core board of the backlight module, and the residual charges are released by the core board, thereby avoiding the occurrence of the shutdown ghost. Because the core board of the display device is connected with an external signal source or a ground wire and the like, the residual charges on the display panel are guided out of the display device through the core board, the existing circuit components in the display device can be fully utilized, the circuit arrangement in the display device is simplified, and the cost of the display device is reduced.
In this embodiment, as shown in fig. 3, the discharge circuit further includes a connector 140, the connector 140 is connected between the signal processing circuit board and the core board, and specifically, the connector 140 may be communicated with the source electrode of the connection switch device 231 to conduct a discharge path between the signal processing circuit board of the display panel and the core board of the backlight module, so as to release the residual charges. Of course, other communication paths for signal interaction and the like can be arranged in the signal processing circuit board and the backlight module, so that the signal interaction is realized and the release of residual charges is assisted.
The above description is only an alternative embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the technical solutions that can be directly or indirectly applied to other related fields without departing from the spirit of the present application are intended to be included in the scope of the present application.
Claims (8)
1. A display device, characterized in that the display device comprises:
the display device comprises a display panel, a driving circuit and a driving circuit, wherein the display panel comprises a plurality of pixels which are arranged in an array mode, and each pixel comprises a pixel capacitor; and the number of the first and second groups,
the discharge assembly comprises a discharge signal source and a discharge circuit, the discharge signal source is set to generate a discharge signal to enable electrodes in the same pixel capacitor to be short-circuited when the display device is shut down, and the discharge circuit is connected with at least one electrode in the pixel capacitor to release residual charges in the pixel capacitor;
the signal processing circuit board is arranged on the display panel and comprises a connecting switch device, a gate electrode of the connecting switch device is connected with the discharge signal source, a source electrode of the connecting switch device is grounded, when the display device is turned off, the source electrode and a drain electrode of the connecting switch device are conducted, and residual charges on the data line are guided to the signal processing circuit board.
2. The display apparatus according to claim 1, wherein the discharge circuit includes a discharge switching device, a gate electrode of the discharge switching device being connected to the source of the discharge signal, a drain electrode of the discharge switching device being connected to at least one electrode of the pixel capacitance;
when the discharge signal source generates the discharge signal, the discharge switching device is switched on to release residual charges in the pixel capacitor; otherwise, the discharge switching device is turned off to insulate the discharge circuit from the pixel capacitance.
3. The display device of claim 2, wherein the electrode in the pixel capacitance comprises a pixel electrode;
the pixel comprises a pixel switching device, a gate electrode of the pixel switching device is connected with a scanning line in the display panel, a drain electrode of the pixel switching device is connected with a data line in the display panel, and a source electrode of the pixel switching device is connected with the pixel electrode.
4. The display device of claim 3, wherein the electrode in the pixel capacitance comprises a common electrode;
and the drain electrode of the discharge switching device is connected with the common electrode, and the source electrode of the discharge switching device is connected with the data line.
5. The display device according to claim 4, wherein the discharge switching devices and the data lines are arranged in one-to-one correspondence.
6. The display apparatus of claim 4, wherein the pixel switching device is a negative channel metal oxide semiconductor thin film transistor;
the discharge switching device is a positive channel metal oxide semiconductor thin film transistor.
7. The display device of claim 6, wherein the discharge circuit further comprises:
the core board is arranged on a backlight module of the display device, and the backlight module and the display panel are arranged in a stacked mode.
8. The display device of claim 7, wherein the discharge circuit further comprises:
a connector connected between the signal processing circuit board and the core board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811577368.9A CN109509451B (en) | 2018-12-21 | 2018-12-21 | Display device |
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| CN201811577368.9A CN109509451B (en) | 2018-12-21 | 2018-12-21 | Display device |
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| CN109509451A CN109509451A (en) | 2019-03-22 |
| CN109509451B true CN109509451B (en) | 2021-04-27 |
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