Data transmission circuit board, mobile industry processor interface and device

Patent metadata

Field	Value
Publication number	US-11357100-B2
Application number	US-201816472286-A
Country	US
Kind code	B2
Filing date	Dec 13, 2018
Priority date	Mar 9, 2018
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

A data transmission circuit board, a mobile industry processor interface and a device are provided. The data transmission circuit board includes: a wiring substrate; a plurality of data transmission line pairs on one side of the wiring substrate; and a plurality of transient voltage suppression diodes on the one side of the wiring substrate. Data transmission lines of the data transmission line pairs are coupled to the transient voltage suppression diodes in a one-to-one correspondence, the line width of at least one data transmission line is within a line width threshold range; and the transient voltage suppression diode is configured to discharge when a voltage to ground on the corresponding data transmission line is greater than a discharge voltage threshold, wherein the discharge voltage threshold is not less than a maximum voltage value of the differential signal transmitted on the data transmission line.

First claim

The invention claimed is:

1. A data transmission circuit board, applied to a mobile industry processor interface, wherein the data transmission circuit board comprises:
a wiring substrate;
a plurality of data transmission line pairs on one side of the wiring substrate; and
a plurality of transient voltage suppression diodes on the one side of the wiring substrate;

wherein:
data transmission lines of the data transmission line pairs are coupled to the transient voltage suppression diodes in a one-to-one correspondence, and a line width of at least one of the data transmission lines is within a line width threshold range;
the transient voltage suppression diode is configured to discharge when a voltage to ground on a corresponding data transmission line is greater than a discharge voltage threshold; wherein the discharge voltage threshold is not less than a maximum voltage value of a differential signal transmitted on the data transmission line.

2. The data transmission circuit board according to claim 1 , wherein for one data transmission line pair, the transient voltage suppression diodes coupled to the data transmission lines are symmetrically disposed on two sides of an extension direction of the data transmission line pair.

3. The data transmission circuit board according to claim 1 , wherein the transient voltage suppression diode is at an input end, adjacent to the mobile industry processor interface, of the corresponding data transmission line.

4. The data transmission circuit board according to claim 1 , wherein a first terminal of the transient voltage suppression diode is connected to the corresponding data transmission line, and a second terminal of the transient voltage suppression diode is grounded.

5. The data transmission circuit board according to claim 4 , wherein the transient voltage suppression diode is a unidirectional transient voltage suppression diode, a positive terminal of the unidirectional transient voltage suppression diode is connected to the data transmission line, and a negative terminal of the unidirectional transient voltage suppression diode is grounded.

6. The data transmission circuit board according to claim 4 , wherein the transient voltage suppression diode is a bi-directional transient voltage suppression diode, a positive terminal of the bi-directional transient voltage suppression diode is connected to the data transmission line, and a negative terminal of the bi-directional transient voltage suppression diode is grounded.

7. The data transmission circuit board according to claim 4 , wherein the transient voltage suppression diode is a bi-directional transient voltage suppression diode, a positive terminal of the bi-directional transient voltage suppression diode is grounded, and a negative terminal of the bi-directional transient voltage suppression diode is connected to the data transmission line.

8. The data transmission circuit board according to claim 1 , wherein at least one data transmission line of each data transmission line pair is coupled to a differential impedance adjustment module; and
the differential impedance adjustment module is configured to adjust a differential impedance of the coupled data transmission line.

9. The data transmission circuit board according to claim 8 , wherein the differential impedance adjustment module comprises an adjustment resistor, and the adjustment resistor is connected in series with the data transmission line.

10. The data transmission circuit board according to claim 1 , wherein a parasitic capacitance of the transient voltage suppression diode is less than 0.5 pf.

11. The data transmission circuit board according to claim 1 , wherein the line width threshold range is from 20 μm to 50 μm.

12. The data transmission circuit board according to claim 1 , wherein the data transmission circuit board is a flexible printed circuit.

13. A mobile industry processor interface, comprising the data transmission circuit board according to claim 1 .

14. A display module, comprising the mobile industry processor interface according to claim 13 .

15. An electronic device, comprising the mobile industry processor interface according to claim 13 .

16. The electronic device according to claim 15 , wherein the electronic device comprises a mobile terminal.

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• An Na
• Long Quan
• Wang Guochun
• Yu Zuoxin
• Liu Dianzhong
• Gong xinfeng
• Ci Gang
• Guo Baolei
• Xu Bin
• Xu Shaopeng
• Liu Xuzhong
• Luo Zongwei
• Zhou Jinzhao
• Ma Xiao
• Luo Zhenhua
• Guan Qingzhu
• Zhang Zheng
• Su Wei

Classifications

• H05K1/0259 Primary

  Electrostatic discharge [ESD] protection · CPC title

• H05K2201/10174

  Diode · CPC title

• H05K1/0262

  Arrangements for regulating voltages or for using plural voltages · CPC title

• H05K1/0257

  Overvoltage protection · CPC title

• H05K1/023 Primary

  using auxiliary mounted passive components or auxiliary substances (printed passive components H05K1/16) · CPC title