CN116560143A - Substrate, display panel and display device - Google Patents

Substrate, display panel and display device Download PDF

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Publication number
CN116560143A
CN116560143A CN202310481577.8A CN202310481577A CN116560143A CN 116560143 A CN116560143 A CN 116560143A CN 202310481577 A CN202310481577 A CN 202310481577A CN 116560143 A CN116560143 A CN 116560143A
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China
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units
substrate
electrode
impedance
signal transmission
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Chinese (zh)
Inventor
杨远界
叶利丹
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HKC Co Ltd
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HKC Co Ltd
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Priority to CN202310481577.8A priority Critical patent/CN116560143A/en
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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
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Geometry (AREA)
  • Human Computer Interaction (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention provides a substrate, a display panel and a display device, wherein the substrate comprises a plurality of impedance matching units, the impedance matching units are in one-to-one correspondence with a plurality of signal transmission lines, and the impedance matching units are electrically connected with electrode units corresponding to the signal transmission lines through the signal transmission lines; the sum of the matching impedance of the impedance matching unit and the line impedance of the signal transmission line, which are electrically connected with the same electrode unit, is recorded as the channel impedance corresponding to the electrode unit; the difference between the at least two channel impedances is less than or equal to a set threshold. In the substrate disclosed by the invention, the load difference corresponding to at least two electrode units can be reduced, so that the difference of signals received by the at least two electrode units is reduced, the quality of the substrate is improved, and the phenomenon of uneven display of a display panel provided with the substrate can be avoided to a certain extent.

Description

Substrate, display panel and display device
Technical Field
The disclosure relates to the technical field of display, in particular to a substrate, a display panel and a display device.
Background
COM (common electrode) of the touch display screen is divided into a plurality of electrode units, each electrode unit is electrically connected with an IC (chip) through a signal transmission line, that is, each electrode unit needs an IC to be driven independently. For each electrode unit, touch driving signals and display driving signals are alternately input in a time-sharing manner.
During signal transmission, the signal transmission line connected with the electrode unit at the far end (i.e. the electrode unit far from the IC) is longer, and the impedance is larger, so that the load of the signal transmission line at the far end is larger, the signal transmission line of the electrode unit at the near end (i.e. the electrode unit far from the IC) is shorter, and the impedance is smaller, so that the load of the signal transmission line at the near end is smaller. That is, the signal received by the common electrode is attenuated gradually from the near end to the far end. Under the influence of some process flows and screen sizes, the far-end and near-end loads have large differences, especially in display panels with relatively high loads (loading), the difference between the far-end and near-end signals is even more than 20%, and when the driving capability cannot compensate for the difference, the quality of the product can be poor, such as the phenomenon of picture flicker (flicker).
Disclosure of Invention
In order to overcome the problems in the related art, the present disclosure provides a substrate, a display panel and a display device.
According to a first aspect of embodiments of the present disclosure, there is provided a substrate including a common electrode and a plurality of signal transmission lines, the common electrode including a plurality of electrode units, the plurality of electrode units being in one-to-one correspondence with the plurality of signal transmission lines, the electrode units corresponding to each other being electrically connected with the signal transmission lines,
the substrate comprises a plurality of impedance matching units, the impedance matching units are in one-to-one correspondence with the signal transmission lines, and the impedance matching units are electrically connected with the electrode units corresponding to the signal transmission lines through the signal transmission lines;
the sum of the matching impedance of the impedance matching unit and the line impedance of the signal transmission line, which are electrically connected with the same electrode unit, is recorded as the channel impedance corresponding to the electrode unit;
the difference between the impedance of at least two of the channels is less than or equal to a set threshold.
In an alternative embodiment, the substrate includes n multiplexers, the multiplexers including m switch units, the switch units serving as the impedance matching units;
wherein m and n are integers greater than or equal to 2, respectively.
In an alternative embodiment, the substrate includes m common electrode areas, and m switch units included in each multiplexer are in one-to-one correspondence with the m common electrode areas;
the switch units electrically connected with the electrode units in the same common electrode area are marked as the same type of switch units, and the switch control ends of the same type of switch units are electrically connected with each other.
In an alternative embodiment, the switching unit includes a thin film transistor.
In an alternative embodiment, the switching unit includes a transfer tube, and the on-resistance of the N-channel type thin film transistor in the transfer tube is the same as the on-resistance of the P-channel type thin film transistor in the transfer tube.
In an alternative embodiment, the substrate includes m driving units, m driving units are in one-to-one correspondence with m multiplexers, and the driving units corresponding to each other are electrically connected with the multiplexers.
In an alternative embodiment, the type of multiplexer includes at least one of: 2-1 type, 3-1 type, and 6-1 type.
In an alternative embodiment, at least two of said channels have the same impedance.
According to a second aspect of embodiments of the present disclosure, there is provided a display panel including an array substrate and a color film substrate that are stacked;
one of the array substrate and the color film substrate comprises the substrate according to the first aspect.
According to a third aspect of embodiments of the present disclosure, there is provided a display device comprising a mounting structure and a display panel as described in the second aspect, the display panel being mounted to the mounting structure.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: in the substrate disclosed by the disclosure, each electrode unit can be provided with an impedance matching unit, and the impedance matching unit can be electrically connected with the electrode unit through the signal transmission line, so that the channel impedance corresponding to the electrode unit can comprise the line impedance of the signal transmission line electrically connected with the impedance matching unit and the matching impedance of the impedance matching unit, and by configuring different impedance matching units, the difference value between at least two channel impedances is smaller than or equal to a set threshold value, so that the load difference corresponding to at least two electrode units is reduced, the difference of signals received by at least two electrode units is reduced, the quality of the substrate is improved, and the display non-uniformity phenomenon of a display panel provided with the substrate can be avoided to a certain extent.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a partial schematic view of a substrate shown according to an exemplary embodiment.
Fig. 2 is a partial schematic view of a substrate shown according to an example embodiment.
Fig. 3 is an enlarged schematic view of the position a in fig. 2.
Fig. 4 is a partial schematic view of a substrate (driving unit not shown in the drawing) shown according to an exemplary embodiment.
Fig. 5 is a partial schematic view of a substrate shown according to an example embodiment.
Fig. 6 is an enlarged schematic view of the position B in fig. 5.
Fig. 7 is a partial schematic view of a substrate (driving unit not shown in the drawing) shown according to an exemplary embodiment.
Reference numerals illustrate:
100. a common electrode; 110. a common electrode region; 110a, a first common electrode region; 110b, a second common electrode region; 101. an electrode unit; 101a, a first electrode unit; 101b, a second electrode unit; 200. a multiplexer; 210. an impedance matching unit; 210a, a first impedance matching unit; 210b, a second impedance matching unit; 201. a switching unit; 201a, a first opening unit; 201b, a second switch unit; 2011. a switch control end; 300. a signal transmission line; 300a, a first signal transmission line; 400. a driving unit; 500a, a first control line; 500b, a second control line.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods of some embodiments of the present disclosure.
The embodiment of the disclosure provides a substrate. In the substrate, each electrode unit can be provided with an impedance matching unit, and the impedance matching units can be electrically connected with the electrode units through the signal transmission lines, so that the channel impedance corresponding to the electrode units can comprise the line impedance of the signal transmission lines electrically connected with the impedance matching units and the matching impedance of the impedance matching units, and by configuring different switch units, the difference value between at least two channel impedances can be smaller than or equal to a set threshold value, so that the load difference corresponding to at least two electrode units is reduced, the difference of signals received by at least two electrode units is reduced, and the quality of the substrate is improved. The display panel based on the substrate can avoid the phenomenon of uneven display to a certain extent.
In a first embodiment, a substrate is provided. As shown in fig. 1, the substrate may be an array substrate, a color film substrate, or other substrates, which is not limited thereto.
The substrate may include a common electrode 100, and the common electrode 100 may include a plurality of electrode units 101. At least some electrode units 101 among the plurality of electrode units 101 may be multiplexed with the electrode unit 101 serving as a touch electrode of the substrate, which is not limited thereto. For example, the substrate may include a common electrode 100, the common electrode 100 may be multiplexed as a touch electrode of the substrate, the common electrode 100 may include a plurality of electrode units 101, and each electrode unit 101 may also be multiplexed as an electrode unit 101 of the touch electrode. The electrode unit 101 of the touch electrode may also be referred to as a touch sensor.
Wherein the substrate may include a plurality of signal transmission lines 300. The plurality of signal transmission lines 300 are in one-to-one correspondence with the plurality of electrode units 101, and the electrode units 101 corresponding to each other are electrically connected to the signal transmission lines 300. That is, each electrode unit 101 is electrically connected to a unique one of the signal transmission lines 300, and the signal transmission lines 300 may be used to transmit signals to the electrode units 101 to which they are electrically connected.
The signal transmission line 300 may transmit a common voltage signal, which may also be referred to as a display driving signal. It should be noted that, when the electrode unit 101 is reusable as a touch sensor, the signal transmission line 300 may also transmit a touch driving signal. Of course, the signal transmission line 300 may also transmit other desired signals, which is not limited thereto.
Wherein, the substrate may include a plurality of impedance matching units 210. The plurality of impedance matching units 210 are in one-to-one correspondence with the plurality of signal transmission lines 300, i.e., the plurality of impedance matching units 210 are in one-to-one correspondence with the plurality of electrode units 101. Each of the impedance matching units 210 may be electrically connected to the electrode unit 101 corresponding to the signal transmission line 300 through the corresponding signal transmission line 300. That is, one signal transmission line 300 and one impedance matching unit 210 are connected to each electrode unit 101.
The sum of the matching impedance of the impedance matching unit 210 and the line impedance of the signal transmission line 300, which are electrically connected to the same electrode unit 101, can be referred to as the channel impedance corresponding to the electrode unit 101. For example, referring to fig. 1, when the first electrode unit 101a is electrically connected to the first signal transmission line 300a and the first signal transmission line 300a is electrically connected to the first impedance matching unit 210a, the channel impedance corresponding to the first electrode unit 101a is the sum of the matching impedance of the first impedance matching unit 210a and the line impedance of the first signal transmission line 300 a.
Wherein, in the substrate, the difference value between the impedance of at least two channels is smaller than or equal to a set threshold value. It should be noted that the difference in the present disclosure may be a value obtained by subtracting a smaller value from a larger value. The set threshold may be determined according to actual conditions, and the specific value thereof may not be determined.
For example, if the difference between the two channel impedances in the substrate is less than or equal to X, the display difference between the positions of the electrode units 101 corresponding to the two channel impedances of the display panel manufactured based on the substrate is acceptable, the set threshold may be set to be less than or equal to X, where the smaller the set threshold is, the better the display effect.
The set threshold may be set to 0, where the difference between the impedances of at least two channels is less than or equal to 0, that is, the impedances of at least two channels are the same, so as to better reduce the display difference of the positions of the electrode units 101 corresponding to the impedances of at least two channels.
In the substrate, each electrode unit 101 may be provided with an impedance matching unit 210, and the impedance matching unit 210 may be electrically connected to the electrode unit 101 through the signal transmission line 300, so that the channel impedance corresponding to the electrode unit 101 may include the line impedance of the signal transmission line 300 electrically connected to the impedance matching unit and the matching impedance of the impedance matching unit 210, and by configuring different impedance matching units 210, the difference between at least two channel impedances may be smaller than or equal to a set threshold, and impedance optimization may be performed on the electrode units 101 with different distances, so as to reduce the difference between signals received by at least two electrode units 101, improve the uniformity of each electrode unit 101, and thereby improve the quality of the substrate. The display panel based on the substrate can avoid uneven brightness to a certain extent.
For example, when the substrate is applied to a liquid crystal display panel, it can improve the picture flicker phenomenon of the liquid crystal display panel.
The difference between the impedance of any two channels can be set to be smaller than or equal to the set threshold, so that the display difference corresponding to any two electrode units 101 can be accepted, that is, the display difference of the positions of any electrode units 101 in the display panel manufactured based on the substrate can be accepted, thereby better improving the quality of the substrate, further improving the display effect of the display panel and better avoiding the flicker phenomenon.
For example, the difference between any two channel impedances is less than or equal to 0, i.e., any two channel impedances are the same, i.e., all channel impedances are the same, respectively. In the display panel manufactured based on the substrate, since the impedances of all channels are the same, the positions of all the electrode units 101 are displayed almost without difference, so that the quality of the substrate can be better improved, the display effect of the display panel is further improved, and the flicker phenomenon is better avoided.
In a second embodiment, a substrate is provided. Referring to fig. 2, the substrate may include n multiplexers 200, where n is an integer greater than or equal to 2. The specific value of n may be set according to practical requirements, which is not limited.
Wherein each of the multiplexers 200 may include m switching units 201, m being an integer greater than or equal to 2. The switching unit 201 may function as an impedance matching unit. That is, the number of the switching units 201 is the same as the number of the impedance matching units 210, and each switching unit 201 serves as one impedance matching unit. The on-resistance of the switch unit 201 is the matching resistance.
That is, the channel impedance corresponding to the electrode unit 101 may be a sum of the on-resistance of the switching unit 201 electrically connected to the electrode unit 101 and the line impedance of the signal transmission circuit electrically connected to the electrode unit 101.
Wherein the n multiplexers 200 may be of the same type. The type of multiplexer 200 may be any of the following: 2 types of 1 (1:2) and 3 types of 1 (1:3) and 6 types of 1 (1:6). That is, m may be any one of 2, 3 and 6. For example, when the multiplexer 200 is of the type 2-1, the multiplexer 200 may include 2 switching units 201. For another example, when the multiplexer 200 is of the type 3-1, the multiplexer 200 may include 3 switching units 201.
In some embodiments of the present invention, in some embodiments,
referring to fig. 2, the substrate may include 2n electrode units 101 and 2n signal transmission lines 300. The substrate may also include n 2-out-of-1 type multiplexers 200, and each multiplexer 200 may include 2 switching units 201. That is, the substrate includes 2n switching units 201. Each of the switch units 201 may be electrically connected to one of the electrode units 101 through one of the signal transmission lines 300, i.e., the substrate may include 2n signal transmission paths.
In this embodiment, when transmitting a signal through the multiplexer 200, the switching unit 201 having a smaller selectable on-resistance is turned on for the longer signal transmission line 300; for a shorter signal transmission line 300, the switching unit 201 with a smaller on-resistance may be selected to be turned on. Therefore, the on-resistance of each signal transmission channel is the same, so that the attenuation difference of different signal transmission channels in the signal transmission process is better avoided, the quality of a substrate is improved, and the picture flickering phenomenon is better avoided.
In the substrate, the multiplexer 200 is relatively common, reliable and low in cost, and by arranging the multiplexer 200, the conduction of the switch units 201 with different conduction impedances can be better controlled, so that the impedance matching of the signal transmission lines 300 with different lengths can be conveniently realized, the impedance optimization of the electrode units 101 with different distances can be realized, the uniformity of each electrode unit 101 can be improved, and the uneven display phenomenon of the display panel can be improved.
In a third embodiment, a substrate is provided. As shown with reference to fig. 2 and 3, the substrate may include m common electrode regions 110. Each common electrode region 110 may include a plurality of electrode units 101. Wherein the plurality of fingers is greater than or equal to two.
The m switching units 201 included in each of the multiplexers 200 are in one-to-one correspondence with the m common electrode regions 110. That is, only one electrode unit 101 in each common electrode region 110 among the m common electrode regions 110 is electrically connected to one switching unit 201 in the same multiplexer 200.
In some embodiments of the present invention, in some embodiments,
referring to fig. 2 and 3, each of the multiplexers 200 includes 2 switching units 201, which may be respectively denoted as a first switching unit 201a and a second switching unit 201b. The substrate includes 2 common electrode regions 110, which may be referred to as a first common electrode region 110a and a second common electrode region 110b, respectively. In this embodiment, in each of the multiplexers 200, the first switching unit 201a may be electrically connected to one of the electrode units 101 in the first common electrode region 110a, and the second switching unit 201b may be electrically connected to one of the electrode units 101 in the second common electrode region 110b.
Among them, the switching units 201 electrically connected to the electrode units 101 in the same common electrode region 110 are denoted as the same type of switching units 201. The switch control terminals 2011 of the same type of switch units 201 are electrically connected to each other so as to perform uniform control.
In some embodiments of the present invention, in some embodiments,
referring to fig. 2 and 3, the substrate may include n multiplexers 200, and each multiplexer 200 may include 2 switching units 201, which are respectively denoted as a first switching unit 201a and a second switching unit 201b. The substrate may include 2 common electrode regions 110, which may be referred to as a first common electrode region 110a and a second common electrode region 110b, respectively. Wherein the first and second common electrode regions 110a and 110b may include n electrode units 101, respectively.
In this embodiment, the n electrode units 101 of the first common electrode region 110a may be electrically connected to the first switch units 201a of the n multiplexers 200, respectively, and the n electrode units 101 of the second common electrode region 110b may be electrically connected to the second switch units 201b of the n multiplexers 200, respectively.
In this embodiment, the n first switch units 201a may be denoted as a first type of switch unit 201, and the switch control ends 2011 of the n first switch units 201a are electrically connected to each other, so that the arrangement of the circuit is facilitated, and the on/off of the n first switch units 201a is conveniently and uniformly controlled; the n second switch units 201b may be denoted as a second type of switch unit 201, where the switch control ends 2011 of the n second switch units 201b are electrically connected to each other, so that the arrangement of the circuit is facilitated, and the on and off of the n second switch units 201b are controlled uniformly.
In the substrate, the switch control ends 2011 of the switch units 201 of the same type are electrically connected with each other, so that the arrangement of circuits is facilitated, and the uniform control of the switch units 201 of the same type is facilitated.
In a fourth embodiment, a substrate is provided. Referring to fig. 2 to 4, in the substrate, the switching unit 201 may include a Thin Film Transistor (TFT), which may be of a P-channel type or an N-channel type, without limitation.
That is, in the substrate, the multiplexer 200 may be implemented based on a TFT. Among them, the 2-out-of-1 type multiplexer 200 may include two TFTs. The 3-select 1 type multiplexer 200 may include three TFTs. The m select 1 type multiplexer 200 may include m TFTs.
The on-state impedance of the TFT is the matching impedance. The on-state impedance of the TFT may be determined based on its channel width to length ratio (W/L), that is, in the substrate, matching of channel impedances of different electrode units 101 may be achieved by providing TFTs of different channel width to length ratios, so as to improve uniformity of the different electrode units 101.
Wherein the switch control terminal 2011 of the TFT refers to the gate of the TFT. The switch control terminals 2011 of the same type of switch cells 201 may be electrically connected to each other by electrically connecting the gates of the same type of TFTs, i.e., the gates of the TFTs electrically connected to the electrode cells 101 in the same common electrode region 110.
In some embodiments of the present invention, in some embodiments,
referring to fig. 2 to 4, the common electrode 100 of the substrate may include two common electrode regions 110, which may be respectively referred to as a first common electrode region 110a and a second common electrode region 110b. The first common electrode region 110a may include n electrode units 101, and the second common electrode region 110b may also include n electrode units 101.
The substrate may include n 2-out-of-1 type multiplexers 200, and each multiplexer 200 may include 2 TFTs. That is, the substrate includes 2n TFTs. Wherein each TFT may be electrically connected to one electrode unit 101 through one signal transmission line 300, i.e., the substrate may include 2n signal transmission paths.
In each of the multiplexers 200, one TFT is electrically connected to one electrode unit 101 of the first common electrode region 110a through the signal transmission line 300, and the other TFT is electrically connected to one electrode unit 101 of the second common electrode region 110b through the signal transmission line 300.
The gates of all TFTs electrically connected to the electrode unit 101 in the first common electrode area 110a may be electrically connected through the first control line 500a, and the gates of all TFTs electrically connected to the electrode unit 101 in the second common electrode area 110b may be electrically connected through the second control line 500b, so as to further facilitate the arrangement of TFT devices and related lines.
The following description will take the two electrode units 101 of the first common electrode region 110a and the two electrode units 101 of the second common electrode region 110b as examples for impedance optimization. Wherein, referring to fig. 2 to 4, the two electrode units 101 of the first common electrode region 110a may be respectively denoted as sensors 1 And sensor 2 The two electrode units 101 of the second common electrode region 110b may be respectively denoted as sensors 3 And sensor 4 。
The sensor 1 And sensor 3 A multiplexer 200 is shared, the multiplexer 200 being denoted as MUX 1 ，MUX 1 Can be described as TFT (TFT) 11 ) And sensor 1 Electrically connected, MUX 1 Is referred to as a TFT (can be referred to as a TFT) 12 ) And sensor 3 And (5) electric connection. The sensor 2 And sensor 4 A multiplexer 200 is shared, the multiplexer 200 being denoted as MUX 2 ，MUX 2 Can be described as TFT (TFT) 21 ) And sensor 2 Electrically connected, MUX 2 Is referred to as a TFT (can be referred to as a TFT) 22 ) And sensor 4 And (5) electric connection.
Among them, TFT 11 The on-state impedance of (a) can be recorded asTFT 12 The on-state impedance of (2) can be described as +.>TFT 21 The on-state impedance of (2) can be described as +.>TFT 22 The on-state impedance of (2) can be described as +.>TFT 11 And sensor 1 The line impedance of the signal transmission line 300 therebetween can be described as +.>TFT 12 And sensor 3 The line impedance of the signal transmission line 300 therebetween can be noted asTFT 21 And sensor 2 The line impedance of the signal transmission line 300 therebetween can be described as +.>TFT 22 And sensor 4 The line impedance of the signal transmission line 300 therebetween can be described as +.>
In this embodiment mode, the TFT can be used as a substrate 11 、TFT 12 、TFT 21 And TFT (thin film transistor) 22 The channel width-to-length ratio (W/L) of the semiconductor device is respectively and reasonably set so as to ensure that Thus, impedance matching of the signal transmission lines 300 with different lengths can be realized, thereby realizing impedance matchingOptimization of channel impedance corresponding to electrode units 101 at the same distance improves uniformity of electrode units 101 at different distances.
In the substrate, a TFT may be used as the switching unit 201 in the multiplexer 200 to achieve more precise control, and impedance matching may be better performed, so that impedance optimization of the electrode units 101 at different distances may be more precisely achieved, uniformity of the electrode units 101 may be improved, and display non-uniformity of the display panel based on the substrate may be improved.
In a fifth embodiment, a substrate is provided. Referring to fig. 5 to 7, in the substrate, the switching unit 201 may include a transmission pipe (TG), which may also be referred to as a transmission gate. TG may generally include one N-channel type thin film transistor (N TFT) and one P-channel type thin film transistor (P TFT).
That is, in the substrate, the multiplexer 200 may be implemented based on TG. Wherein the 2-select-1 type multiplexer 200 may include two TGs. The 3-select 1 type of multiplexer 200 may include three TGs. The m select 1 type of multiplexer 200 may include m TGs.
The matching impedance of TG may refer to the impedance when both the N TFT and the P TFT in TG are in an on state. That is, the matching impedance of TG may be related to the on-state impedance (may also be referred to as on-state impedance) of N TFT and the on-state impedance of N TFT. Note that in the same TG, the on-state impedance of the N TFT and the on-state impedance of the N TFT may be set to be the same.
The switch control terminal 2011 of TG may include a gate of N TFT and a gate of P TFT. The electrical connection between the switch control terminals 2011 of the same type of switch unit 201 may mean that the gates of the N TFTs in the same type of TG are electrically connected to each other, and the gates of the P TFTs in the same type of TG are electrically connected to each other.
In some embodiments of the present invention, in some embodiments,
referring to fig. 5 to 7, the common electrode 100 of the substrate may include two common electrode regions 110, which may be respectively referred to as a first common electrode region 110a and a second common electrode region 110b. The first common electrode region 110a may include n electrode units 101, and the second common electrode region 110b may also include n electrode units 101.
The substrate may include n 2-out-of-1 type multiplexers 200, and each multiplexer 200 may include 2 TGs. That is, the substrate includes 2n TGs. Each TG may be electrically connected to one electrode unit 101 through one signal transmission line 300, that is, the substrate may include 2n signal transmission paths.
In each of the multiplexers 200, one TG is electrically connected to one electrode unit 101 of the first common electrode region 110a through the signal transmission line 300, and the other TG is electrically connected to one electrode unit 101 of the second common electrode region 110b through the signal transmission line 300.
Among all TGs to which the electrode units 101 in the first common electrode region 110a are electrically connected, gates of all N TFTs may be electrically connected through one control line (refer to MUX1-N in fig. 6), and gates of all P TFTs may be electrically connected through another control line (refer to MUX1-P in fig. 6); of all TGs to which the electrode units 101 in the second common electrode region 110b are electrically connected, gates of all N TFTs may be electrically connected through one control line (refer to MUX2-N in fig. 6), and gates of all P TFTs may be electrically connected through another control line (refer to MUX2-P in fig. 6). Thus, the arrangement of the TG device and the related wiring can be facilitated.
The following description will take the two electrode units 101 of the first common electrode region 110a and the two electrode units 101 of the second common electrode region 110b as examples for impedance optimization. Wherein, referring to fig. 5 to 7, the two electrode units 101 of the first common electrode region 110a may be respectively denoted as sensors 1 And sensor 2 The two electrode units 101 of the second common electrode region 110b may be respectively denoted as sensors 3 And sensor 4 。
The sensor 1 And sensor 3 A multiplexer 200 is shared, the multiplexer 200 being denoted as MUX 1 ，MUX 1 Is (can be noted as TG) 11 ) And sensor 1 Electrically connected, MUX 1 Is referred to as TG (can be referred to as TG) 12 ) And sensor 3 And (5) electric connection. The sensor 2 And sensor 4 Share a multiplexer 200, which is multipleThe way selector 200 may be denoted as a MUX 2 ，MUX 2 Is (can be noted as TG) 21 ) And sensor 2 Electrically connected, MUX 2 Is referred to as TG (can be referred to as TG) 22 ) And sensor 4 And (5) electric connection.
Wherein TG 11 Can be written as the matching impedance ofTG 12 The matching impedance of (2) can be described as +.>TG 21 The matching impedance of (2) can be described as +.>TG 22 The matching impedance of (2) can be described as +.>TG 11 And sensor 1 The line impedance of the signal transmission line 300 therebetween can be described as +.>TG 12 And sensor 3 The line impedance of the signal transmission line 300 therebetween can be described as +.>TG 21 And sensor 2 The line impedance of the signal transmission line 300 therebetween can be described as +.>TG 22 And sensor 4 The line impedance of the signal transmission line 300 therebetween can be described as +.>
In this embodiment, the method can be realized by the method of the following steps 11 N TFT and PTFT, TG of (2) 12 N TFT and PTFT, TG of (2) 21 NTFT and PTFT and TG of (2) 22 The channel width to length ratio (W/L) of the N TFT and the PTFT are reasonably set respectively, so thatAnd->And->And->The difference value is smaller than or equal to the set threshold value, so that impedance matching of the signal transmission lines 300 with different lengths can be realized, optimization of channel impedance corresponding to the electrode units 101 with different distances can be realized, and uniformity of the electrode units 101 with different distances can be improved.
In this base plate, can use TG as the switch unit 201 in the multiplexer 200, whole more stable, it is better to open the effect, more be favorable to the transmission of signal to realize more accurate control, more accurate realization is to the impedance optimization of the electrode unit 101 of different distances, improves the homogeneity of each electrode unit 101, improves the picture scintillation phenomenon of display panel based on this base plate.
In a sixth embodiment, a substrate is provided. Referring to fig. 2 or 5, the substrate may include m driving units 400, and the driving units 400 may be driving chips (ICs), and the ICs may be Chip On Film (COF) based ICs.
Wherein, the m driving units 400 and the m multiplexers 200 may be in one-to-one correspondence. The driving units 400 corresponding to each other are electrically connected to the multiplexer 200. That is, each of the multiplexers 200 is provided with one driving unit 400, and each of the driving units 400 is electrically connected to one of the multiplexers 200.
That is, in the substrate, a single driving unit 400 may drive a plurality of electrode units 101 through one multiplexer 200. The number of electrode units 101 that can be driven by a single driving unit 400 may be determined by the type of the multiplexer 200. For example, when the multiplexer 200 is of the m-select 1 type (i.e., the single multiplexer 200 includes m switching units 201), the single driving unit 400 may drive m electrode units 101 through one multiplexer 200.
In the substrate, by arranging the driving units 400 and the multiplexers 200 in a one-to-one correspondence manner, a single driving unit 400 can drive a plurality of electrode units 101, and the number of the driving units 400 can be reduced, so that the circuit between the driving units 400 and the common electrode 100 is reduced, the cost can be reduced, the occupied space can be reduced, and a narrow frame can be better realized.
In a seventh embodiment, a display panel (not shown in the drawings) is provided. The display panel can comprise an array substrate and a color film substrate, wherein one of the color film substrate and the array substrate can comprise the substrate so as to improve the display non-uniformity phenomenon of the display panel. The display panel may be an Organic Light Emitting Diode (OLED) display panel or a Liquid Crystal Display (LCD) display panel, which is not limited thereto. The display panel may be a Touch display panel, which may be an In-cell Touch display panel, an Advanced-field switching (ADS) mode, a Fringe Field Switching (FFS) mode, or a Vertically Aligned (VA) mode, which is not limited thereto.
In the display panel, the quality of the substrate can be improved by arranging the substrate, so that the phenomenon of picture flickering of the display panel can be avoided to a certain extent, and the display effect of the display panel is improved.
In an eighth embodiment, a display device (not shown in the drawings) is provided. The display device may include a mounting structure and the display panel described above. The display panel can be mounted on the mounting structure. The mounting structure may include a housing or a middle frame, which is not limited. The display device may be a display screen, and the display screen may be a touch display screen. The display device may be a mobile phone, a computer, a television, a wearable device, or the like provided with a display screen, which is not limited thereto. The display device can well improve the display effect by arranging the display panel.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present application, and are not meant to limit the scope of the invention, but to limit the scope of the invention.

Claims (10)

1. A substrate including a common electrode and a plurality of signal transmission lines, the common electrode including a plurality of electrode units, the plurality of electrode units being in one-to-one correspondence with the plurality of signal transmission lines, the electrode units corresponding to each other being electrically connected with the signal transmission lines, characterized in that,
the substrate comprises a plurality of impedance matching units, the impedance matching units are in one-to-one correspondence with the signal transmission lines, and the impedance matching units are electrically connected with the electrode units corresponding to the signal transmission lines through the signal transmission lines;
the sum of the matching impedance of the impedance matching unit and the line impedance of the signal transmission line, which are electrically connected with the same electrode unit, is recorded as the channel impedance corresponding to the electrode unit;
the difference between the impedance of at least two of the channels is less than or equal to a set threshold.
2. The substrate according to claim 1, wherein the substrate comprises n multiplexers including m switching units as the impedance matching units;
wherein m and n are integers greater than or equal to 2, respectively.
3. The substrate according to claim 2, wherein the substrate comprises m common electrode areas, and m switch units included in each of the multiplexers are in one-to-one correspondence with the m common electrode areas;
the switch units electrically connected with the electrode units in the same common electrode area are marked as the same type of switch units, and the switch control ends of the same type of switch units are electrically connected with each other.
4. The substrate of claim 2, wherein the switching unit comprises a thin film transistor.
5. The substrate according to claim 2, wherein the switching unit includes a transfer tube, and an on-resistance of an N-channel type thin film transistor in the transfer tube is the same as an on-resistance of a P-channel type thin film transistor in the transfer tube.
6. The substrate according to claim 2, wherein the substrate comprises m driving units, m driving units are in one-to-one correspondence with m multiplexers, and the driving units corresponding to each other are electrically connected with the multiplexers.
7. The substrate of claim 2, wherein the type of multiplexer comprises at least one of: 2-1 type, 3-1 type, and 6-1 type.
8. The substrate of any one of claims 1-7, wherein at least two of the channel impedances are the same.
9. The display panel is characterized by comprising an array substrate and a color film substrate which are stacked;
one of the array substrate and the color film substrate, comprising the substrate as set forth in any one of claims 1 to 8.
10. A display device comprising a mounting structure and the display panel of claim 9, the display panel being mounted to the mounting structure.
CN202310481577.8A 2023-04-27 2023-04-27 Substrate, display panel and display device Pending CN116560143A (en)

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Application Number Priority Date Filing Date Title
CN202310481577.8A CN116560143A (en) 2023-04-27 2023-04-27 Substrate, display panel and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310481577.8A CN116560143A (en) 2023-04-27 2023-04-27 Substrate, display panel and display device

Publications (1)

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