Driver integrated circuit for driving display panel, display device and method for driving driver integrated circuit capable of providing different current intensities to different length transmission wires

Patent metadata

Field	Value
Publication number	US-10304398-B2
Application number	US-201515302111-A
Country	US
Kind code	B2
Filing date	Oct 9, 2015
Priority date	May 28, 2015
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

A driver IC for driving a display panel, a display device and a method for driving the driver IC are provided. The driver IC is provided with N pins corresponding to N signal transmission lines of the display panel respectively. Each pin is connected to one corresponding signal transmission line through one transmission wire. The N pins include a first pin and a second pin. The transmission wires include a first transmission wire connected to the first pin and a second transmission wire connected to the second pin and having a length less than the first transmission wire. The driver IC includes a signal generation module configured to generate N driving signals. The N driving signals include a first driving signal corresponding to the first pin and a second driving signal corresponding to the second pin and having a current intensity less than the first driving signal.

First claim

What is claimed is:

1. A driver integrated circuit (IC) for driving a display panel, wherein the driver IC is provided with N pins, N is an integer greater than or equal to 2, the N pins correspond to N signal transmission lines of the display panel respectively, each of the N pins is connected to a corresponding one of the signal transmission lines through a corresponding one of N transmission wires, the N pins comprise a first pin and a second pin, the transmission wires each having a length, the transmission wires comprise a first transmission wire connected to the first pin and a second transmission wire connected to the second pin, and the length of the second transmission wire is less than the length of the first transmission wire,
wherein the driver IC comprises a signal generation module configured to generate N driving signals each corresponding to one of the N pins, and
the N driving signals comprise a first driving signal corresponding to the first pin and a second driving signal corresponding to the second pin, the second driving signal having a current intensity less than the first driving signal,
the signal generation module comprises:
a first signal generation unit configured to generate N initial signals; and
a signal adjustment unit configured to adjust current intensities of the N initial signals in accordance with the lengths of the transmission wires connected to the N pins corresponding to the N initial signals, to obtain the N driving signals,
wherein the driving signals each have a voltage identical to a corresponding one of the N initial signals.

2. The driver IC for driving the display panel according to claim 1 , wherein the driver IC is a data driver IC or a gate driver IC.

3. The driver IC for driving the display panel according to claim 1 , wherein when N is larger than 2, the N signal transmission lines are separated from each other in a first direction, and the lengths of the transmission wires connected to the N signal transmission lines decrease and then increase gradually in the first direction.

4. The driver IC for driving the display panel according to claim 1 , wherein the signal adjustment unit comprises:
a plurality of voltage followers connected to the first signal generation unit; and
a control unit configured to determine bias currents for respective ones of the voltage followers in accordance with the lengths of the transmission wires connected to the N pins corresponding to the N initial signals,
wherein the control unit is configured to output a first one of the bias currents for one of the voltage followers corresponding to the first pin and a second one of the bias currents for one of the voltage followers corresponding to the second pin, and the first one of the bias currents has a current intensity greater than the second one of the bias currents.

5. The driver IC for driving the display panel according to claim 4 , wherein each of the voltage followers is an operational amplifier, an output end and a reverse-phase input end of which are connected to each other.

6. The driver IC for driving the display panel according to claim 4 , wherein the control unit is a time controller.

7. The driver IC for driving the display panel according to claim 4 , wherein the N pins are divided into M groups of the pins, M is an integer greater than or equal to 2;
wherein the pins in each one of the M groups of the pins are provided with an identical one of the bias currents; and
for any two of the M groups of the pins corresponding to respective ones of the transmission wires having different average lengths, the average length of a longest one of the transmission wires corresponding to the pins of one of the two M groups of the pins is less than the average length of a shortest one of the transmission wires corresponding to the pins of the other one of the two M groups of pins, and a current intensity of the bias current outputted by the control unit to the one of the two M groups of the pins corresponding to transmission wires having the larger average length is greater than a current intensity of the bias current outputted by the control unit to the other one of the two M group of the pins corresponding to transmission wires having the smaller average length.

8. The driver IC for driving the display panel according to claim 4 , wherein for any two of the N pins connected to a respective pair of the transmission wires the lengths of which differ, a current intensity of the driving signal corresponding to the pin connected to a longer one of the pair of the transmission wires is greater than a current intensity of the driving signal corresponding to the pin connected to a shorter one of the pair of the transmission wires.

9. The driver IC for driving the display panel according to claim 8 , wherein for any two of the N pins connected to a respective pair of the transmission wires the lengths of which differ, a current intensity of the bias current outputted by the control unit to one of the voltage followers corresponding to the pin connected to a longer one of the pair of transmission wires is greater than a current intensity of the bias current outputted by the control unit to another one of the voltage followers corresponding to the pin connected to a shorter one of the pair of transmission wires.

10. A display device, comprising a driver integrated circuit, wherein the driver IC is provided with N pins, N is an integer greater than or equal to 2, the N pins correspond to N signal transmission lines of a display panel respectively, each of the pins is connected to a corresponding one of the signal transmission lines through a corresponding one of N transmission wires, the N pins comprise a first pin and a second pin, the transmission wires each have a length, the transmission wires comprise a first transmission wire connected to the first pin and a second transmission wire connected to the second pin, and the length of the second transmission wire is less than the length of the first transmission wire,
wherein the driver IC comprises a signal generation module configured to generate N driving signals each corresponding to one of the N pins, and
the N driving signals comprise a first driving signal corresponding to the first pin and a second driving signal corresponding to the second pin, and the second driving signal having a current intensity less than the first driving signal,
the signal generation module comprises:
a first signal generation unit configured to generate N initial signals; and
a signal adjustment unit configured to adjust current intensities of the N initial signals in accordance with the lengths of the transmission wires connected to the N pins corresponding to the N initial signals, to obtain the N driving signals,
wherein the driving signals each have a voltage identical to a corresponding one of the N initial signals.

11. A method for driving a driver integrated circuit (IC) for a display panel, wherein the driver IC is provided with N pins, N is an integer greater than or equal to 2, the N pins correspond to N signal transmission lines of the display panel respectively, each of the N pins is connected to a corresponding one of the signal transmission lines through a corresponding one of N transmission wires, the N pins comprise a first pin and a second pin, the transmission wires each having a length, the transmission wires comprise a first transmission wire connected to the first pin and a second transmission wire connected to the second pin, and the length of the second transmission wire is less than the length of the first transmission wire,
wherein the method comprises a step of generating N driving signals each corresponding to o

Assignees

• Boe Technology Group Co Ltd
• Hefei Boe Optoelectronics Tech

Inventors

• Zheng Liangliang
• He Jian
• Feng Xia
• Jin Tingting

Classifications

• H01L27/0203

  Electricity · mapped topic

• G09G3/3648 Primary

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G09G2310/0289

  Details of voltage level shifters arranged for use in a driving circuit · CPC title

• G09G3/3688

  suitable for active matrices only · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title