CN110737140B - Display panel, control method thereof and display device - Google Patents
Display panel, control method thereof and display device Download PDFInfo
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- CN110737140B CN110737140B CN201911050281.0A CN201911050281A CN110737140B CN 110737140 B CN110737140 B CN 110737140B CN 201911050281 A CN201911050281 A CN 201911050281A CN 110737140 B CN110737140 B CN 110737140B
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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
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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
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Abstract
The invention discloses a display panel, a control method thereof and a display device, belonging to the technical field of display, wherein a first electrode block of the display panel is positioned in a first display area, and a second electrode block is positioned in a second display area; the first group of signal line switches are electrically connected with the first driving unit through a first bus, and the second group of signal line switches are electrically connected with the second driving unit through a second bus; in the display stage, the first group of signal line switches and the second group of signal line switches are both opened, the first driving unit provides a common voltage signal of the first bus, the second driving unit provides a common voltage signal of the second bus, and the common voltage signals transmitted to each electrode block are equal. The control method of the display panel is used for controlling the display panel. The display device comprises the display panel. The invention can better improve the visual split screen phenomenon, improve the visual effect and the user experience, and is further beneficial to improving the display quality of the large-size display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a control method thereof and a display device.
Background
Liquid crystal displays are widely used in electronic products such as computer screens, mobile phones, flat panel televisions, etc. because of their advantages of being thin and light, power saving, and non-radiative. Specifically, the liquid crystal display includes a liquid crystal panel, and the liquid crystal panel is composed of an array substrate, a color film substrate and a liquid crystal encapsulated between the two substrates. In recent years, the user's pursuit for the display effect of the display device has been increasing, and display devices with higher and higher resolutions have been popular with users. The higher the resolution, the less the loss of the image displayed by the display device. With the gradual development of screen sizes, two or more driver chips are often used to perform display driving in order to meet the requirement of resolution enhancement. Therefore, as the resolution of the display is continuously improved, the method of driving the display by using a single driving chip cannot meet the requirement, and the trend of performing the split-screen driving by using a plurality of driving chips is becoming.
However, in a display device that uses two or more driver chips for display driving, due to the limitation of the manufacturing process, the parameters of the driver chips of the same type may not be completely consistent, and thus, when a plurality of driver chips of the same type input the same signal, the output common voltage of each driver chip may not be completely the same, and there may be a certain difference, so that the display picture controlled and driven by different driver chips in the display device may have a dividing line at the dividing line, which may cause the visual screen splitting phenomenon at the interface of the screen, and further affect the display effect, and the user experience is poor.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a display panel, a control method thereof, and a display device, which can make the common voltages output by different driver chips identical, prevent the display images controlled and driven by different driver chips from having a dividing line at the dividing line, reduce the visual screen-splitting phenomenon as much as possible, and are beneficial to improving the user experience.
Disclosure of Invention
In view of the above, the present invention provides a display panel, a control method thereof, and a display device, so as to solve the problems that when a display device in the prior art adopts different driving chips to control driving, a display image has a dividing line at a boundary, so that a screen is visually split at a boundary, and further a display effect is affected, and a user experience is poor.
The present invention provides a display panel, comprising: a display area and a non-display area disposed around the display area; the display area at least comprises a first display area and a second display area which are adjacently arranged along a first direction; the display area comprises a plurality of electrode blocks which are arranged in an array manner, each electrode block comprises a first electrode block and a second electrode block, the first electrode blocks are positioned in the first display area, and the second electrode blocks are positioned in the second display area; the non-display area comprises at least two driving units which are respectively a first driving unit and a second driving unit, the first driving unit corresponds to the first display area, and the second driving unit corresponds to the second display area; the non-display area also comprises at least two groups of signal line switches which are respectively a first group of signal line switches and a second group of signal line switches; each first electrode block is electrically connected with the first driving unit through a first signal wire, and each second electrode block is electrically connected with the second driving unit through a second signal wire; the first signal wire is electrically connected with the first group of signal wire switches, and the second signal wire is electrically connected with the second group of signal wire switches; the first group of signal line switches are electrically connected with the first driving unit through a first bus, and the second group of signal line switches are electrically connected with the second driving unit through a second bus; the working stage of the display panel comprises a touch stage and a display stage: in the touch control stage, the first group of signal line switches and the second group of signal line switches are closed, the first driving unit transmits a touch control detection signal to the first electrode block through the first signal line, and the second driving unit transmits a touch control detection signal to the second electrode block through the second signal line; in the display stage, the first group of signal line switches and the second group of signal line switches are both opened, the first driving unit provides a common voltage signal of the first bus, the second driving unit provides a common voltage signal of the second bus, and the common voltage signals transmitted to each electrode block are equal.
Based on the same inventive concept, the invention also provides a control method of the display panel, which is used for controlling the display panel, and the control method comprises the following steps: in a touch control stage, the first group of signal line switches and the second group of signal line switches are both closed, the first driving unit transmits a touch control detection signal to the first electrode block through the first signal line, and the second driving unit transmits a touch control detection signal to the second electrode block through the second signal line; in the display stage, the first group of signal line switches and the second group of signal line switches are both opened, the first driving unit provides a common voltage signal of the first bus, the second driving unit provides a common voltage signal of the second bus, and the common voltage signals transmitted to each electrode block are equal.
Based on the same inventive concept, the invention also provides a display device which comprises the display panel.
Compared with the prior art, the display panel, the control method thereof and the display device provided by the invention at least realize the following beneficial effects:
in the display panel provided by the invention, the plurality of electrode blocks arranged in an array manner are positioned in the range of the display area, the first electrode block is positioned in the first display area, and the second electrode block is positioned in the second display area. The non-display area comprises a first driving unit and a second driving unit, each first electrode block is electrically connected with the first driving unit through a first signal line, each second electrode block is electrically connected with the second driving unit through a second signal line, and the first driving unit and the second driving unit are respectively used for driving and controlling the electrode blocks in different display area ranges, transmitting control signals for the electrode blocks in different display areas and receiving detection signals of the electrode blocks in the corresponding display area ranges. The invention also sets at least two groups of signal line switches, the number of the groups of the signal line switches corresponds to the number of the driving units, and the two groups of the signal line switches are respectively a first group of signal line switches and a second group of signal line switches. In the display stage of the display panel, the first group of signal line switches and the second group of signal line switches are both opened, at the moment, the first driving unit and the second driving unit which are controlled to have the same type input signals are different through an external detection circuit, so that the first driving unit is enabled to pass through the first bus, the second driving unit is enabled to output the common voltage signals to each electrode block through the second bus to be equal, the common voltage difference of different pictures driven by different driving units is reduced, the visual split screen phenomenon is well improved, the visual effect and the user experience are improved, and the display quality of the large-size display panel is favorably improved.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic plan view of another display panel according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of the first set of signal line switches of FIG. 2;
FIG. 4 is a schematic plan view of another display panel according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for controlling a display panel according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating another method for controlling a display panel according to an embodiment of the present invention;
FIG. 7 is a flowchart of another control method for a display panel according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1, fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention, where a display panel 000 according to the embodiment includes: a display area AA and a non-display area NA disposed around the display area AA;
the display area AA includes at least a first display area AA1 and a second display area AA2 adjacently disposed along the first direction X; the display area AA comprises a plurality of electrode blocks 10 arranged in an array, each electrode block 10 comprises a first electrode block 101 and a second electrode block 102, the first electrode blocks 101 are located in the first display area AA1, and the second electrode blocks 102 are located in the second display area AA2; optionally, the first direction X is an extending direction of the gate line;
the non-display area NA includes at least two driving units 20, which are a first driving unit 201 and a second driving unit 202, respectively, the first driving unit 201 corresponds to the first display area AA1, and the second driving unit 202 corresponds to the second display area AA2; optionally, the first driving unit 201 and the second driving unit 202 are driving chips or flexible circuit boards;
the non-display area NA further includes at least two sets of signal line switches 30, which are a first set of signal line switches 301 and a second set of signal line switches 302, respectively;
each first electrode block 101 is electrically connected with the first driving unit 201 through a first signal line 401, and each second electrode block 102 is electrically connected with the second driving unit 202 through a second signal line 402; the first signal line 401 is electrically connected to the first group signal line switch 301, and the second signal line 402 is electrically connected to the second group signal line switch 302; it should be noted that, in order to clearly illustrate the technical solution of the present embodiment, in fig. 1, the first signal line 401 and the second signal line 402 are differentiated by different thicknesses, and in a specific implementation, the thicknesses of the first signal line 401 and the second signal line 402 may be set according to impedance balance, which is not limited in this implementation.
The first group of signal line switches 301 are electrically connected with the first driving unit 201 through a first bus 501, and the second group of signal line switches 302 are electrically connected with the second driving unit 202 through a second bus 502;
the working phase of the display panel 000 includes a touch phase and a display phase:
in the touch stage, the first group of signal line switches 301 and the second group of signal line switches 302 are both turned off, the first driving unit 201 transmits the touch detection signal to the first electrode block 101 through the first signal line 401, and the second driving unit 202 transmits the touch detection signal to the second electrode block 102 through the second signal line 402;
in the display phase, the first group of signal line switches 301 and the second group of signal line switches 302 are both turned on, the first driving unit 201 provides the common voltage signal of the first bus 501, the second driving unit 202 provides the common voltage signal of the second bus 502, and the common voltage signals transmitted to each electrode block 10 are equal.
Specifically, with the development of the self-contained touch display technology, as shown in fig. 1, the common electrode of the array substrate in the display panel can be used as the touch sensing electrode for self-contained touch detection, and the touch control and the display control are performed in time sequence by time-sharing driving, so as to simultaneously realize the touch and display functions of the display panel. Specifically, the common electrode is divided into a plurality of block electrodes, and each block electrode is connected with the same driving chip through a wire. And providing touch sensing signals for the corresponding block electrodes at a touch time sequence, and providing display driving voltages for the corresponding block electrodes at a display time sequence. However, as the large size of the screen gradually develops, a plurality of driving chips are required to provide a common voltage signal for each block electrode, and the inventor finds that the parameters of the driving chips of the same type cannot be completely consistent due to the limitation of the manufacturing process, so that when a plurality of driving chips of the same type input the same signal, the common voltage output by each driving chip cannot be completely identical, and a certain difference exists, which causes the phenomenon of visual split screen at the junction of the screen, and the user experience is poor.
In the display panel 000 provided in this embodiment, the display area AA at least includes a first display area AA1 and a second display area AA2 that are adjacently disposed along the first direction X, the plurality of electrode blocks 10 arranged in an array are located in the range of the display area AA, the first electrode block 101 is located in the first display area AA1, and the second electrode block 102 is located in the second display area AA2.
The non-display area NA comprises a first driving unit 201 and a second driving unit 202, each first electrode block 101 is electrically connected with the first driving unit 201 through a first signal line 401, each second electrode block 102 is electrically connected with the second driving unit 202 through a second signal line 402, the first driving unit 201 and the second driving unit 202 are respectively used for driving and controlling the electrode blocks 10 in different display area AA ranges, and transmitting control signals for the electrode blocks in the different display area AA and receiving detection signals for the electrode blocks 10 in the corresponding display area AA ranges; that is, the first driving unit 201 corresponds to the first display area AA1, the second driving unit 202 corresponds to the second display area AA2, the first driving unit 101 is configured to provide driving signals for the first electrode blocks 101 in the range of the first display area AA1 and receive detection signals of the first electrode blocks 101, and the second driving unit 202 is configured to provide driving signals for the second electrode blocks 102 in the range of the second display area AA2 and receive detection signals of the second electrode blocks 102.
The present embodiment also sets the signal line switches 30 in at least two groups, the number of the groups of the signal line switches 30 corresponding to the number of the driving units, the two groups of the signal line switches 30 being the first group of the signal line switches 301 and the second group of the signal line switches 302, respectively.
In the touch stage of the display panel, the first group of signal line switches 301 and the second group of signal line switches 302 are both turned off, the first driving unit 201 transmits a touch detection signal to the first electrode block 101 through the first signal line 401, and the first driving unit 201 receives a detection signal of the first electrode block 101 through the first signal line 401; the second driving unit 202 transmits the touch detection signal to the second electrode block 102 through the second signal line 402, and the second driving unit 202 receives the detection signal of the second electrode block 102 through the second signal line 402.
In the display stage of the display panel, the first group of signal line switches 301 and the second group of signal line switches 302 are both turned on, the first group of signal line switches 301 are used for transmitting the output common voltage of the first driving unit 201 to each first electrode block 101 through the first bus 501 and the first signal line 401 in sequence, the second group of signal line switches 302 are used for transmitting the output common voltage of the second driving unit 202 to each second electrode block 102 through the second bus 502 and the second signal line 402 in sequence, at this time, the input signals of the first driving unit 201 and the second driving unit 202 of the same model are controlled to be different through the external detection circuit, so that the common voltage signals output to each electrode block 10 by the first driving unit 201 and the second driving unit 202 are equal, the common voltage difference of different pictures controlled and driven by different driving units 20 is reduced, the visual split screen phenomenon is improved, the visual effect and the use experience of a user are improved, and the display quality of a large-size display panel is improved.
It should be noted that, in fig. 1 of the present embodiment, only the non-display area NA of the display panel 000 includes two driving units 20 as an example to explain how the present embodiment achieves the effect of avoiding the visual screen splitting phenomenon, it is understood that the technical solution of the present embodiment is not limited to two driving units 20, but may also include three or more driving units 20 (not shown in the figure). If the non-display area of the display panel comprises three driving units, in order to achieve the effect of avoiding visual split screen phenomenon, the display area of the display panel is correspondingly three, the electrode blocks at least comprise a first electrode block, a second electrode block and a third electrode block which are positioned in three different display areas, and the first electrode block, the second electrode block and the third electrode block are respectively connected to the three different driving units through different signal lines and buses. Therefore, the present embodiment does not need to describe any more specific implementation of the non-display area including three or more driving units, and can be designed by analogy with the description of the above embodiments. Fig. 1 of the present embodiment only illustrates technical features of the display panel related to the technical solution of the present embodiment, and it can be understood that the structure of the display panel not only includes the illustration in the figure, but also includes other technical features known in the prior art for implementing a display function, such as a pixel unit in a display area, a gate driving unit in a non-display area (not shown in the figure), and the like, which are not illustrated and described in detail herein. The shape of the electrode block 10 of the present embodiment is schematically illustrated as a square, and in concrete implementation, the shape of the electrode block 10 may be any other shape. The number and size of the electrode blocks 10 in this embodiment are also only schematically illustrated, and in specific implementation, the number of the electrode blocks 10 is not limited to the number in the figure, and the size of the electrode blocks 10 may also be set according to actual requirements.
In some optional embodiments, please continue to refer to fig. 1, in the present embodiment, the first driving unit 201 records the first control code, the second driving unit 202 records the second control code, the first control code is different from the second control code, and the common voltage signal provided by the first driving unit 201 for the first bus 501 is equal to the common voltage signal provided by the second driving unit 202 for the second bus 502.
The embodiment further explains that the external detection circuit controls the input signals of the first driving unit 201 and the second driving unit 202 of the same model to be different, so that the common voltage signals output to each electrode block 10 by the first driving unit 201 and the second driving unit 202 are equal, specifically, the parameter difference between the first driving unit 201 and the second driving unit 202 is detected through tests, a control code capable of outputting the same common voltage is found, different control codes are burnt on different driving units, the same common voltage value is output by different driving units 20, and the common voltage value is used on a display panel, so that the effect of equal common voltage value of each electrode block 10 is realized. For example, through experimental detection, it is found that when the first driving unit 201 and the second driving unit 202 are required to output a common voltage of-195 mV, the first driving unit 201 needs to burn the first control code 27H, and the second driving unit 202 needs to burn the second control code 28H, so that the first driving unit 201 and the second driving unit 202 can output a common voltage of-195 mV; the 27H and 28H are hexadecimal numbers of a vcom register corresponding to the driving chips, each driving chip has a cross table corresponding to a numerical value to correspond to, and the burnt 27H and 28H values are obtained by scanning a flicker smile curve of the display panel and are not fixed values, so that the same common output voltage can be obtained by burning 27H and 28H of different driving chips through table lookup. It should be noted that the burning of different control codes needs to be completed before the process of manufacturing the display panel, so that the driving unit 20 used by the panel can output the same common voltage. The cross table of each different control chip is inconsistent (e.g., the Vcom voltage (i.e., the common voltage value) corresponding to one driving chip programming 27H is-0.10 v, while the Vcom voltage corresponding to the driving chip programming 28H is-0.15 v, and each 16-ary number is 50mv different).
It should be noted that the specific control code burned by the driving unit 20 can be obtained by a smile curve obtained by testing, where the smile curve is a curve whose abscissa is Vcom (i.e., a common voltage value) and ordinate is a panel flicker value (i.e., a screen flicker value). Each different control unit 20 controls different display screens to display a corresponding smile curve, and the lowest point of the smile curve is a control code to be burned for the corresponding common voltage Vcom.
In some optional embodiments, please continue to refer to fig. 1, in the present embodiment, along the second direction Y, the first driving unit 201 and the second driving unit 202 are located on the same side of the display area AA, and the first display area AA1 is disposed adjacent to the first driving unit 201, and the second display area AA2 is disposed adjacent to the second driving unit 202; wherein the first direction X intersects the second direction Y. Optionally, the first direction X is an extending direction of the gate lines, and the second direction Y is an extending direction of the data lines.
The embodiment further explains that the first driving unit 201 and the second driving unit 202 are located on the same side of the display area AA, and the first display area AA1 is disposed adjacent to the first driving unit 201, the first driving unit 201 is used for controlling and driving the first display area AA1 to perform display and touch detection, the second display area AA2 is disposed adjacent to the second driving unit 202, and the second driving unit 202 is used for controlling and driving the second display area AA2 to perform display and touch detection, so that the first signal line 401 and the second signal line 402 can be reasonably arranged, and simultaneously, the signal transmission between the first electrode block 101 and the first driving unit 201 can be realized through the first signal line 401, and the signal transmission between the second electrode block 102 and the second driving unit 202 can be realized through the second signal line 402.
In some optional embodiments, please continue to refer to fig. 1, in the present embodiment, the first group of signal line switches 301 are located on a side of the first display area AA1 away from the first driving unit 201; the second group of signal line switches 302 are located on a side of the second display area AA2 away from the second driving unit 202.
The present embodiment further explains that the first group of signal line switches 301 and the second group of signal line switches 302 are located on the same side of the display area AA, and the first group of signal line switches 301 and the first driving unit 201 are located on opposite sides of the first display area AA1, and the second group of signal line switches 302 and the second driving unit 202 are located on opposite sides of the second display area AA2, so that it can be avoided that the first group of signal line switches 301, the second group of signal line switches 302, the first driving unit 201, and the second driving unit 202 are located on the same side of the display area AA to occupy too much space of the non-display area NA on a single-sided frame, so that the frame width of the display panel is reasonable in design, and is uniform in distribution, which is beneficial to layout of other structures of the non-display area NA.
In some alternative embodiments, please refer to fig. 2 and fig. 3, fig. 2 is a schematic plan view of another display panel according to an embodiment of the present invention, fig. 3 is a partially enlarged view of the first group of signal line switches 301 in fig. 2, in this embodiment, the first group of signal line switches 301 includes a plurality of first switch transistors 3011 connected in parallel, and the second group of signal line switches 302 includes a plurality of second switch transistors 3021 connected in parallel;
the gates of the first switch transistors 3011 are electrically connected to the first switch control terminal SW1, the first poles of the first switch transistors 3011 are electrically connected to the first bus 501, and the second poles of the first switch transistors 3011 are electrically connected to one first signal line 401;
the gates of the second switching transistors 3021 are electrically connected to the second switching control terminal SW2, the first poles of the second switching transistors 3021 are electrically connected to the second bus 502, and the second poles of the second switching transistors 3021 are electrically connected to one of the second signal lines 402, respectively.
This embodiment further explains a specific structure of the first group of signal line switches 301 and the second group of signal line switches 302 for implementing the on and off functions, that is, the first group of signal line switches 301 includes a plurality of first switch transistors 3011 connected in parallel, the gates of the first switch transistors 3011 are electrically connected to the first switch control terminal SW1, and the first switch transistors 3011 are controlled to be turned on and off by the high level or the low level input from the first switch control terminal SW1, since the first poles of the first switch transistors 3011 are electrically connected to the first bus 501 and the second poles of the first switch transistors 3011 are electrically connected to one first signal line 401, respectively, when the first switch transistors 3011 are all in the on state, the common voltage signal output by the first driving unit 201 can be transmitted to each first electrode block 101 through the first bus 501, the first switch transistors 3011 and the first signal lines 401, respectively.
The second group signal line switch 302 includes a plurality of second switch transistors 3021 connected in parallel, gates of the second switch transistors 3021 are electrically connected to the second switch control terminal SW2, and each of the second switch transistors 3021 is controlled to be turned on and off by a high level or a low level input from the second switch control terminal SW2, and since first poles of the second switch transistors 3021 are electrically connected to the second bus line 502 and second poles of the second switch transistors 3021 are electrically connected to one of the second signal lines 402, when the second switch transistors 3021 are in an on state, the common voltage signal output from the second driving unit 202 may be transmitted to each of the second electrode blocks 102 through the second bus line 502, the second switch transistors 3021 and the second signal lines 402, respectively.
It should be noted that, in the present embodiment, the high-low level signals of the first switch control terminal SW1 and the second switch control terminal SW2 may be input by separate control signal lines, or the signal input may be completed by the driving unit 20. In this embodiment, the types of the first switch transistor 3011 and the second switch transistor 3021 are not particularly limited, and may be either N-type or P-type, and in the specific implementation, they may be selected according to actual situations.
In some optional embodiments, please continue to refer to fig. 1 to fig. 3, in this embodiment, when the first signal lines 401 and the second signal lines 402 are disposed in the same layer, each of the first signal lines 401 and each of the second signal lines 402 do not overlap in a direction perpendicular to the light exit surface of the display panel 000.
Since each electrode block 10 of the present embodiment is connected to the driving unit 20 through a signal line, each first electrode block 101 is electrically connected to the first driving unit 201 through a first signal line 401, and each second electrode block 102 is electrically connected to the second driving unit 202 through a second signal line 402, in order to implement the display and touch functions of the display panel 000, short circuit should be avoided between different first signal lines 401, short circuit should be avoided between different second signal lines 402, and short circuit should be avoided between any one first signal line 401 and any one second signal line 402, so when the first signal lines 401 and the second signal lines 402 are disposed on the same layer, each first signal line 401 and each second signal line 402 do not overlap in a direction perpendicular to the light exit surface of the display panel 000.
When a larger space is available on the display panel for disposing the first signal lines 401 and the second signal lines 402 on the same layer, in order to avoid short circuit caused by too small space between the different first signal lines 401, short circuit caused by too short space between the different second signal lines 402, and short circuit caused by too short space between any one first signal line 401 and any one second signal line 402, the embodiment is disposed in a direction perpendicular to the light exit surface of the display panel 000, and each first signal line 401 and each second signal line 402 are not overlapped, so that the phenomenon of short circuit caused by crossing of wires when the first signal lines 401 and the second signal lines 402 on the same layer are disposed can be avoided, and further, the display and touch functions of the display panel 000 are realized.
It can be understood that, when the space on the display panel is not enough to provide a plurality of first signal lines 401 and second signal lines 402 in the same layer, the first signal lines 401 and the second signal lines 402 may be arranged in layers, that is, the film layer where the first signal lines 401 are located is different from the film layer where the second signal lines 402 are located, or adjacent first signal lines 401 are in different film layers, or adjacent second signal lines 402 are in different film layers, or the same first signal line 401 is provided with a multi-section structure of different film layers through a via hole, or the same second signal line 402 is provided with a multi-section structure of different film layers through a via hole, so that the adjacent first signal lines 401 may be prevented from being overlapped or partially overlapped in a direction perpendicular to the light exit surface of the display panel 000, or the adjacent second signal lines 402 are overlapped or partially overlapped in a direction perpendicular to the light exit surface of the display panel 000, or the first signal lines 401 and the second signal lines 402 are not overlapped or partially overlapped, thereby achieving reasonable wiring arrangement and preventing the signal lines from being overlapped.
It should be noted that fig. 1 and fig. 2 in this embodiment only schematically illustrate the routing manner of the first signal line 401 and the second signal line 402 disposed on the same layer, but are not limited to this routing manner, and in specific implementation, the routing manner may be set according to practical situations, and only the first signal line 401 and the second signal line 402 on the same layer need not be overlapped in a direction perpendicular to the light exit surface of the display panel 000. In this embodiment, the film layers where the first signal line 401 and the second signal line 402 are located are not specifically limited, and may be made of any conductive film layer (such as a gate metal layer or a source/drain metal layer) in the display panel, which is not described in detail in this embodiment.
In some alternative embodiments, with continued reference to fig. 1-3, in the present embodiment, the first signal line 401 and the second signal line 402 are common voltage signal lines.
This embodiment further explains that the first signal line 401 and the second signal line 402 in the above embodiments are common voltage signal lines for providing a common voltage signal to each electrode block 10 in the touch phase and the display phase, and in the display phase, the first signal line 401 and the second signal line 402 provide the same common voltage value to each electrode block 10 through the driving unit 20, and at this time, the electrode block 10 is used as a common electrode; in the touch control stage, the first signal lines 401 and the second signal lines 402 transmit touch control driving signals for each electrode block 10 and simultaneously receive touch control detection signals to realize a touch control detection function, and at the moment, the electrode blocks 10 are used as touch control electrodes, so that the same signal lines can be reused in the touch control stage and the display stage of the display panel, the layout number of the signal lines is reduced, and the phenomena of process difficulty increase and short circuit caused by excessive signal lines are avoided.
In some alternative embodiments, with continued reference to fig. 1-3 and 4, in this embodiment, each electrode block 10 of the display panel 000 has the same shape.
This embodiment further explains that each electrode block 10 of the display panel 000 has the same shape, and the shape of the electrode block 10 may be square, regular polygon (as shown in fig. 4, fig. 4 is a schematic plan view of another display panel provided in the embodiment of the present invention), circular or other shapes, and the shape of each electrode block 10 is designed to be the same, which can reduce the process difficulty and improve the process efficiency.
In some optional embodiments, please refer to fig. 1-4 and fig. 5, fig. 5 is a flowchart of a control method of a display panel according to an embodiment of the present invention, in which the control method of the display panel is used to control the display panel 000 in any one of the embodiments, and the control method includes:
in the touch phase T1, the first group of signal line switches 301 and the second group of signal line switches 302 are both turned off, the first driving unit 201 transmits a touch detection signal to the first electrode block 101 through the first signal line 401, and the second driving unit 202 transmits a touch detection signal to the second electrode block 102 through the second signal line 402;
in the display period T2, the first group of signal line switches 301 and the second group of signal line switches 302 are both turned on, the first driving unit 101 provides the common voltage signal of the first bus 501, the second driving unit 202 provides the common voltage signal of the second bus 502, and the common voltage signals transmitted to each electrode block 10 are equal.
Specifically, in a touch phase T1 of the display panel, the first group of signal line switches 301 and the second group of signal line switches 302 are both turned off, the first driving unit 201 transmits a touch detection signal to the first electrode block 101 through the first signal line 401, and the first driving unit 201 receives a detection signal of the first electrode block 101 through the first signal line 401; the second driving unit 202 transmits the touch detection signal to the second electrode block 102 through the second signal line 402, and the second driving unit 202 receives the detection signal of the second electrode block 102 through the second signal line 402.
In a display stage T2 of the display panel, the first group of signal line switches 301 and the second group of signal line switches 302 are both turned on, the first group of signal line switches 301 transmit the output common voltage of the first driving unit 201 to each first electrode block 101 sequentially through the first bus 501 and the first signal line 401, the second group of signal line switches 302 transmit the output common voltage of the second driving unit 202 to each second electrode block 102 sequentially through the second bus 502 and the second signal line 402, at this time, the input signals of the first driving unit 201 and the second driving unit 202 of the same model are controlled to be different through the external detection circuit, so that the common voltage signals output to each electrode block 10 by the first driving unit 201 and the second driving unit 202 are equal, thereby reducing the common voltage difference of different pictures controlled and driven by different driving units 20, better improving the phenomenon of visual split, improving the visual effect and the use experience of a user, and further facilitating the improvement of the display quality of a large-size display panel.
It should be noted that, although the control method of the display panel of the present embodiment includes the touch stage T1 and the display stage T2, the two working stages can be simultaneously realized, specifically, the touch control and the display control are performed in time sequence by time-sharing driving, and then the touch and display functions of the display panel are simultaneously realized.
In some optional embodiments, please refer to fig. 6, fig. 6 is a flowchart of a control method of another display panel according to an embodiment of the present invention, in this embodiment, in a display phase T2 of the display panel, the first group of signal line switches 301 and the second group of signal line switches 302 are both turned on, the first driving unit 101 provides a common voltage signal of the first bus 501, the second driving unit 202 provides a common voltage signal of the second bus 502, and the common voltage signals transmitted to each electrode block 10 are equal, specifically:
the connection end of the first driving unit 201 and the first signal line 401 is floating (i.e. the connection end of the first driving unit 201 and the first signal line 401 does not transmit an electrical signal), the connection end of the second driving unit 202 and the second signal line 402 is floating (i.e. the connection end of the second driving unit 202 and the second signal line 402 does not transmit an electrical signal), the first bus 501 transmits a common voltage signal to each first electrode block 101 through the first group of signal line switches 301, and the second bus 502 transmits a common voltage signal to each second electrode block 102 through the second group of signal line switches 302.
This embodiment further explains that in the display period T2, when the first group signal line switch 301 and the second group signal line switch 302 are both turned on, the common voltage signal can be transmitted to the first electrode block 101 and the second electrode block 102 through the first driving unit 201 and the second driving unit 202 respectively in a manner that the connection end of the first driving unit 201 and the first signal line 401 is floated, the connection end of the second driving unit 202 and the second signal line 402 is floated, the common voltage signal output by the first driving unit 201 is transmitted to each first electrode block 101 only through the first bus 501 and the first group signal line switch 301, and the common voltage signal output by the second driving unit 202 is transmitted to each second electrode block 102 only through the second bus 502 and the second group signal line switch 302, so that the load amount and the working strength of the driving unit 20 can be reduced, and the power consumption can be saved.
In some optional embodiments, please refer to fig. 7, fig. 7 is a flowchart of a control method of another display panel according to an embodiment of the present invention, in this embodiment, in a display phase T2 of the display panel, the first group of signal line switches 301 and the second group of signal line switches 302 are both turned on, the first driving unit 101 provides a common voltage signal of the first bus 501, the second driving unit 202 provides a common voltage signal of the second bus 502, and the common voltage signals transmitted to each electrode block 10 are equal, specifically:
the common voltage signal transmitted to each first electrode block 101 by the first driving unit 201 through the first signal line 401 and the first bus 501, and the common voltage signal transmitted to each second electrode block 102 by the second driving unit 202 through the second signal line 402 and the second bus 502 are equal.
This embodiment further explains that in the display phase T2, when the first group of signal line switches 301 and the second group of signal line switches 302 are both turned on, the first driving unit 201 and the second driving unit 202 respectively transmit the common voltage signal to the first electrode block 101 and the second electrode block 102 in such a manner that the first driving unit 201 simultaneously transmits the output common voltage signal to each first electrode block 101 through two input terminals (i.e., the input terminal to which the first signal line 401 is connected and the input terminal to which the first bus 501 is connected), and the second driving unit 202 simultaneously transmits the output common voltage signal to each second electrode block 102 through two input terminals (i.e., the input terminal to which the second signal line 402 is connected and the input terminal to which the second bus 502 is connected), so that the common voltage signals of each first electrode block 101 and each second electrode block 102 can be guaranteed to be equal, and the transmission efficiency of the common voltage signal can be improved.
In some optional embodiments, please refer to fig. 8, fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 111 according to the embodiment includes the display panel 000 according to the above embodiments. The embodiment of fig. 8 only takes a mobile phone as an example to describe the display device 111, and it should be understood that the display device 111 provided in the embodiment of the present invention may be other display devices 111 having a display function, such as a computer, a television, an electronic paper, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the display panel 000 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 000 in the above embodiments, which is not described herein again.
As can be seen from the above embodiments, the display panel, the control method thereof, and the display device provided by the present invention at least achieve the following beneficial effects:
in the display panel provided by the invention, the plurality of electrode blocks arranged in an array manner are positioned in the range of the display area, the first electrode block is positioned in the first display area, and the second electrode block is positioned in the second display area. The non-display area comprises a first driving unit and a second driving unit, each first electrode block is electrically connected with the first driving unit through a first signal line, each second electrode block is electrically connected with the second driving unit through a second signal line, and the first driving unit and the second driving unit are respectively used for driving and controlling the electrode blocks in different display area ranges, transmitting control signals for the electrode blocks in different display areas and receiving detection signals of the electrode blocks in the corresponding display area ranges. The invention also sets at least two groups of signal line switches, the number of the groups of the signal line switches corresponds to the number of the driving units, and the two groups of the signal line switches are respectively a first group of signal line switches and a second group of signal line switches. In the display stage of the display panel, the first group of signal line switches and the second group of signal line switches are both opened, at the moment, the first driving unit and the second driving unit which are controlled to have the same type input signals are different through an external detection circuit, so that the first driving unit is enabled to pass through the first bus, the second driving unit is enabled to output the common voltage signals to each electrode block through the second bus to be equal, the common voltage difference of different pictures driven by different driving units is reduced, the visual split screen phenomenon is well improved, the visual effect and the user experience are improved, and the display quality of the large-size display panel is favorably improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A display panel, comprising: a display area and a non-display area disposed around the display area;
the display area at least comprises a first display area and a second display area which are adjacently arranged along a first direction; the display area comprises a plurality of electrode blocks which are arranged in an array mode, each electrode block comprises a first electrode block and a second electrode block, the first electrode blocks are located in the first display area, and the second electrode blocks are located in the second display area;
the non-display area comprises at least two driving units which are respectively a first driving unit and a second driving unit, the first driving unit corresponds to the first display area, and the second driving unit corresponds to the second display area; the non-display area also comprises at least two groups of signal line switches, namely a first group of signal line switches and a second group of signal line switches;
each first electrode block is electrically connected with the first driving unit through a first signal wire, and each second electrode block is electrically connected with the second driving unit through a second signal wire; the first signal line is electrically connected with the first group of signal line switches, and the second signal line is electrically connected with the second group of signal line switches; when the first signal lines and the second signal lines are arranged on the same layer, each first signal line and each second signal line are not overlapped in a direction perpendicular to a light-emitting surface of the display panel;
the first group of signal line switches are electrically connected with the first driving unit through a first bus, the second group of signal line switches are electrically connected with the second driving unit through a second bus, the first driving unit burns a first control code, the second driving unit burns a second control code, the first control code is different from the second control code, and a common voltage signal provided by the first bus by the first driving unit is equal to a common voltage signal provided by the second bus by the second driving unit;
the specific control codes burned by the driving unit are obtained through a smile curve obtained through testing, the abscissa of the smile curve is a public voltage value, the ordinate of the smile curve is a screen flicker value, different display screens controlled and displayed by different control units are respectively provided with the corresponding smile curve, and the lowest point of the smile curve is the control code required to be burned by the corresponding public voltage;
the working stage of the display panel comprises a touch stage and a display stage:
in the touch control stage, the first group of signal line switches and the second group of signal line switches are both closed, the first driving unit transmits a touch control detection signal to the first electrode block through the first signal line, and the second driving unit transmits a touch control detection signal to the second electrode block through the second signal line;
in the display stage, the first group of signal line switches and the second group of signal line switches are both turned on, the first driving unit provides a common voltage signal of the first bus, the second driving unit provides a common voltage signal of the second bus, and the common voltage signals transmitted to each electrode block are equal.
2. The display panel according to claim 1,
along a second direction, the first driving unit and the second driving unit are positioned on the same side of the display area, the first display area is adjacent to the first driving unit, and the second display area is adjacent to the second driving unit; wherein the first direction intersects the second direction.
3. The display panel according to claim 2,
the first group of signal line switches are positioned on one side of the first display area, which is far away from the first driving unit; the second group of signal line switches are positioned on one side of the second display area, which is far away from the second driving unit.
4. The display panel according to claim 1, wherein the first group of signal line switches comprises a plurality of first switching transistors connected in parallel, and the second group of signal line switches comprises a plurality of second switching transistors connected in parallel;
the grid electrodes of the first switch transistors are electrically connected with a first switch control end, the first poles of the first switch transistors are electrically connected with the first bus, and the second poles of the first switch transistors are respectively electrically connected with one first signal line;
the grid electrodes of the second switch transistors are electrically connected with the second switch control end, the first electrodes of the second switch transistors are electrically connected with the second bus, and the second electrodes of the second switch transistors are electrically connected with one second signal line respectively.
5. The display panel according to claim 1, wherein the first signal line and the second signal line are a common voltage signal line.
6. The display panel according to claim 1, wherein each of the electrode blocks has the same shape.
7. A control method of a display panel, the control method being for controlling the display panel according to any one of claims 1 to 6, the control method comprising:
in the touch control stage, the first group of signal line switches and the second group of signal line switches are both closed, the first driving unit transmits a touch control detection signal to the first electrode block through the first signal line, and the second driving unit transmits a touch control detection signal to the second electrode block through the second signal line;
in the display stage, the first group of signal line switches and the second group of signal line switches are both turned on, the first driving unit provides a common voltage signal of the first bus, the second driving unit provides a common voltage signal of the second bus, and the common voltage signals transmitted to each electrode block are equal.
8. The control method of the display panel according to claim 7,
in the display stage, the first group of signal line switches and the second group of signal line switches are both turned on, the first driving unit provides a common voltage signal of the first bus, the second driving unit provides a common voltage signal of the second bus, and the common voltage signals transmitted to each electrode block are equal, specifically:
the first driving unit is connected with the first signal line in a floating mode, the second driving unit is connected with the second signal line in a floating mode, the first bus is transmitted to the public voltage signals of each first electrode block through the first group of signal line switches, and the public voltage signals transmitted to each second electrode block through the second group of signal line switches are equal.
9. The control method of a display panel according to claim 7,
in the display stage, the first group of signal line switches and the second group of signal line switches are both turned on, the first driving unit provides a common voltage signal of the first bus, the second driving unit provides a common voltage signal of the second bus, and the common voltage signals transmitted to each electrode block are equal, specifically:
the first driving unit transmits a common voltage signal to each first electrode block through the first signal line and the first bus, and the second driving unit transmits a common voltage signal to each second electrode block through the second signal line and the second bus to be equal.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 6.
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| CN111625148A (en) * | 2020-05-29 | 2020-09-04 | 信利(仁寿)高端显示科技有限公司 | Embedded display screen and driving method thereof |
| CN111755465B (en) * | 2020-06-30 | 2022-09-23 | 厦门天马微电子有限公司 | Display module and display device |
| CN114660859B (en) * | 2022-03-16 | 2023-07-04 | Tcl华星光电技术有限公司 | Display panel and display device |
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| CN104698666B (en) * | 2015-04-01 | 2018-04-13 | 上海天马微电子有限公司 | Array base palte, contact panel, touch device, display panel and display device |
| CN104777942B (en) * | 2015-05-08 | 2018-02-06 | 厦门天马微电子有限公司 | Touch-control display panel, driving method and touch control display apparatus |
| CN105867033B (en) * | 2016-06-13 | 2019-06-14 | 厦门天马微电子有限公司 | Array substrate and liquid crystal display panel |
| CN105976782B (en) * | 2016-07-15 | 2018-12-21 | 武汉华星光电技术有限公司 | A kind of liquid crystal display device and its driving method |
| CN107290903B (en) * | 2017-07-28 | 2020-08-07 | 武汉天马微电子有限公司 | Array substrate, display panel and display device |
| CN107331365B (en) * | 2017-08-30 | 2020-06-05 | 昆山龙腾光电股份有限公司 | Source driver, display device and elimination method of display split screen |
| KR20190083886A (en) * | 2018-01-05 | 2019-07-15 | 주식회사 실리콘웍스 | Touch screen device |
| CN109637485B (en) * | 2019-01-24 | 2021-02-02 | 合肥京东方光电科技有限公司 | Display panel, control method thereof and display device |
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