Display substrate, display module and control method

Patent metadata

Field	Value
Publication number	US-11086174-B2
Application number	US-202016815800-A
Country	US
Kind code	B2
Filing date	Mar 11, 2020
Priority date	Dec 17, 2019
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A display substrate, a display module and a control method are provided in the present disclosure. The display substrate includes a first substrate and a second substrate. The first substrate includes a base substrate, conductive pads, a first switch unit group electrically connected to the conductive pads and signal wires, and a second switch unit group electrically connected to the conductive pads. The display substrate includes a substrate detection phase where all second switch units are cutoff, all first switch units are conducting, and an external detection device input a first detection signal to the substrate through the conductive pads and all first switch units. When the first switch unit group is conducting, the conductive pads are used for substrate detection, and when the second switch unit group is cutoff, the conductive pads in a same pad region are connected each other to be multiplexed as electrostatic conductive pads.

First claim

What is claimed is:

1. A display substrate, comprising:
a display region and a non-display region surrounding the display region, wherein:
the non-display region includes a first frame region;
the first frame region includes a binding region and a pad region; and
the pad region is at least at one side of the binding region along a first direction; and

a first substrate and a second substrate opposite to the first substrate, wherein the first substrate includes:
a base substrate;
a plurality of conductive pads disposed at a side of the base substrate facing the second substrate, wherein the plurality of conductive pads is at the pad region;
a first switch unit group at the first frame region, wherein the first switch unit group includes a plurality of first switch units, first terminals of all first switch units are electrically connected to all conductive pads in a one-to-one correspondence respectively, and second terminals of all first switch units are electrically connected to different signal wires in the first substrate respectively; and
a second switch unit group at the first frame region, wherein the second switch unit group includes a plurality of second switch units, first terminals of all second switch units are electrically connected to all conductive pads in a one-to-one correspondence respectively, and second terminals of all second switch units electrically connected to the conductive pads at a same pad region are connected with each other; and

wherein at a substrate detection phase:
a conduction signal is provided to gates of all first switch units and a cutoff signal is provided to gates of all second switch units, by an external detection device, thereby enabling all second switch units to be cutoff and all first switch units to be conducting; and
the display substrate is configured to receive a first detection signal inputted by the external detection device through the conductive pads and all first switch units.

2. The display substrate according to claim 1 , wherein:
pad regions are at two sides of the binding region along the first direction, and the conductive pads are symmetrically disposed at two sides of the binding region along the first direction.

3. The display substrate according to claim 1 , wherein:
the first switch unit group and the second switch unit group are respectively at two sides of the conductive pads along a second direction, wherein the first direction intersects the second direction.

4. A display module, comprising:
a display substrate, comprising:
a display region and a non-display region surrounding the display region, wherein:
the non-display region includes a first frame region;
the first frame region includes a binding region and a pad region; and
the pad region is at least at one side of the binding region along a first direction; and

a first substrate and a second substrate opposite to the first substrate, wherein the first substrate includes:
a base substrate;
a plurality of conductive pads disposed at a side of the base substrate facing the second substrate, wherein the plurality of conductive pads is at the pad region;
a first switch unit group at the first frame region, wherein the first switch unit group includes a plurality of first switch units, first terminals of all first switch units are electrically connected to all conductive pads in a one-to-one correspondence respectively, and second terminals of all first switch units are electrically connected to different signal wires in the first substrate respectively; and
a second switch unit group at the first frame region, wherein the second switch unit group includes a plurality of second switch units, first terminals of all second switch units are electrically connected to all conductive pads in a one-to-one correspondence respectively, and second terminals of all second switch units electrically connected to the conductive pads at a same pad region are connected with each other; and

wherein at a substrate detection phase:
a conduction signal is provided to gates of all first switch units and a cutoff signal is provided to gates of all second switch units, by an external detection device, thereby enabling all second switch units to be cutoff and all first switch units to be conducting; and
the display substrate is configured to receive a first detection signal inputted by the external detection device through the conductive pads and all first switch units; and

a drive chip and a conductive structure, wherein:
the drive chip is bound to the binding region;
the second substrate includes an electrostatic shielding layer electrically connected to the conductive pads through the conductive structure; and
wherein at an electrostatic conduction phase:
the conductive pads are multiplexed as electrostatic conduction pads, all first switch units are cutoff, all second switch unit are conducting, and all conductive pads at the same pad region are connected with each other.

5. The display module according to claim 4 , wherein:
the conductive structure includes one conductive structure and the pad region includes one pad region; and an orthographic projection of the conductive structure on a plane of the base substrate respectively overlaps orthographic projections of all conductive pads in the pad region on the plane of the base substrate.

6. The display module according to claim 5 , wherein:
the orthographic projection of the conductive structure on the plane of the base substrate covers the orthographic projections of all conductive pads in the pad region on the plane of the base substrate.

7. The display module according to claim 4 , wherein:
the conductive structure includes two conductive structures and the pad region includes two pad regions;
the two pad regions are at two sides of the binding region along the first direction; and
the two conductive structures and the two pad regions are disposed in a one-to-one correspondence, and an orthographic projection of one conductive structure on a plane of the base substrate respectively overlaps orthographic projections of all conductive pads in the pad region corresponding to the one conductive structure on the plane of the base substrate.

8. The display module according to claim 4 , wherein:
the conductive structure is a colloid doped with conductive particles.

9. The display module according to claim 8 , wherein:
the conductive particles include silver or copper.

10. The display module according to claim 4 , wherein:
the drive chip includes a plurality of first control terminals, and gate electrodes of all first switch units are electrically connected to first control terminals in a one-to-one correspondence; and
at a module detection phase of the display module,
the drive chip, through the first control terminals, is configured to transmit a conduction control signal to a gate electrode of one first switch unit and also transmits a cutoff control signal to gate electrodes of other first switch units, which enables the one first switch unit to be conducting and the other first switch units to be cutoff; and
a signal of a signal wire electrically connected to the one first switch unit is read through a conductive pad and a conducting first switch unit.

11. The display module according to claim 10 , wherein:
the signal wire electrically connected to the one first switch unit includes a clock signal line, a start trigger signal line, a reset signal line, and a constant level signal line.

12. The display module according to claim 4 , wherein:
the drive chip includes a second control terminal having a same quantity as the pad region;
gate electrodes of all

Assignees

• Xiamen Tianma Micro Electronics Co Ltd

Inventors

• Li Donghua
• Wei Xiaoli
• Zhou Xiufeng
• Lai Guochang
• Wu Shumao
• Shen Boping

Classifications

• G09G2330/06

  Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation · CPC title

• G09G2330/04

  Display protection · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G3/20

  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} · CPC title

• G02F1/1345

  Conductors connecting electrodes to cell terminals · CPC title