Circuit board, display substrate and display apparatus

Patent metadata

Field	Value
Publication number	US-12282236-B2
Application number	US-202218016278-A
Country	US
Kind code	B2
Filing date	Feb 28, 2022
Priority date	Feb 28, 2022
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

A circuit board includes an input side and an output side oppositely arranged, and the output side is configured to electrically connect to a display substrate. The circuit board includes a plurality of signal lines extending in a direction from the input side to the output side. Each of the plurality of signal lines includes a main body and a plurality of output branches. Each of the plurality of output branches is connected to one end of the main body close to the output side and has a same line width. A line width of the main body is greater than a sum of line widths of all the output branches belonging to same signal line.

First claim

What is claimed is:

1. A display substrate, comprising a display area and a bonding area, wherein the bonding area comprises a plurality of pads, each of the plurality of pads is arranged corresponding to each of a plurality of signal lines in a circuit board,
the circuit board comprises an input side and an output side oppositely arranged, wherein the output side is configured to electrically connect to the display substrate;
the circuit board comprises the plurality of signal lines extending in a direction from the input side to the output side, the each of the plurality of signal lines comprises a main body and a plurality of output branches, each of the plurality of output branches is connected to one end of the main body close to the output side and has a same line width, and a line width of the main body is greater than a sum of line widths of all the output branches belonging to same signal line;
each of the plurality of pads comprises another main body and a plurality of input branches connected to one end of the another main body away from the display area, a line width of each of the plurality of input branches is equal to a line width of the each of the plurality of output branches, and a line width of the another main body is greater than a sum of line widths of all the input branches belonging to same signal line;
a non-display area of the display substrate surrounding the display area further comprises: a plurality of other signal lines arranged corresponding to the plurality of pads, and a gate drive circuit connected to the plurality of other signal lines, wherein the plurality of other signal lines are correspondingly connected to the plurality of signal lines.

2. The display substrate according to claim 1 , further comprising a printed circuit board electrically connected to the circuit board and a timing control board electrically connected to the printed circuit board, wherein the timing control board comprises a level conversion circuit, and a power management chip and a timing management chip electrically connected to the level conversion circuit respectively.

3. A display apparatus, comprising:
a display substrate and a circuit board electrically connected to the display substrate through a plurality of pads;
wherein the circuit board comprises an input side and an output side oppositely arranged, wherein the output side is configured to electrically connected to the display substrate; the circuit board comprises a plurality of signal lines extending in a direction from the input side to the output side, each of the plurality of signal lines comprises a main body and a plurality of output branches, each of the plurality of output branches is connected to one end of the main body close to the output side and has a same line width, and a line width of the main body is greater than a sum of line widths of all the output branches belonging to same signal line;
wherein the display substrate comprises a display area and a bonding area, wherein the bonding area comprises the plurality of pads, each of the plurality of pads is arranged corresponding to the each of the plurality of signal lines in the circuit board, each of the plurality of pads comprises another main body and a plurality of input branches connected to one end of the another main body away from the display area, a line width of each of the plurality of input branches is equal to a line width of the each of the plurality of output branches, and a line width of the another main body is greater than a sum of line widths of all the input branches belonging to same signal line;
a non-display area of the display substrate surrounding the display area further comprises: a plurality of other signal lines arranged corresponding to the plurality of pads, and a gate drive circuit connected to the plurality of other signal lines, wherein the plurality of other signal lines are correspondingly connected to the plurality of signal lines.

4. The display apparatus according to claim 3 , the circuit board further comprising an ink layer covering a central area of the main body of the each of the plurality of signal lines, wherein there is a preset distance between an edge of the ink layer close to the output side and an edge of the main body close to the output side.

5. The display apparatus according to claim 3 , wherein a ratio of a line length of the main body to a line length of a signal line to which the main body belongs is greater than ½.

6. The display apparatus according to claim 4 , wherein a ratio of the line length of the main body to a line length of the each of the plurality of output branches belonging to the same signal line is greater than 2.

7. The display apparatus according to claim 3 , wherein a ratio of the line width of the main body to the sum of the line widths of all the output branches belonging to the same signal line is greater than 2.

8. The display apparatus according to claim 3 , wherein a distance between two adjacent signal lines is a second distance, a distance between two adjacent output branches of the two adjacent signal lines is a first distance, and the first distance is equal to the second distance.

9. The display apparatus according to claim 8 , wherein an edge of an outermost output branch and an edge of the main body of the same signal line extend along a same straight line.

10. The display apparatus according to claim 9 , wherein a distance between two adjacent output branches of the same signal line is a third distance, and the third distance is smaller than the first distance.

11. The display apparatus according to claim 2 , wherein the each of the plurality of signal lines further comprises an input part connected to one end of the main body close to the input side, and a line length of the each of the plurality of output branches of the same signal line is not greater than a line length of the input part.

12. The display apparatus according to claim 11 , wherein a line width of the each of the plurality of output branches of the same signal line is not greater than a line width of the input part.

13. The display apparatus according to claim 3 , the circuit board further comprising a data driving chip, wherein the plurality of signal lines are provided on two opposite sides of the data driving chip, and an orthographic projection of the data driving chip on the circuit board does not overlap with orthographic projections of the plurality of signal lines on the circuit board.

14. The display apparatus according to claim 13 , wherein the plurality of signal lines comprise at least one of a clock signal line, a high potential signal line, a low potential signal line or a frame start signal line.

Assignees

• Hefei Boe Display Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Dai Ke
• Li Ruilian
• Nie Chunyang

Classifications

• H10W72/071

  Connecting or disconnecting · CPC title

• G02F1/13452 Primary

  Conductors connecting driver circuitry and terminals of panels · CPC title