Display device and method of driving the same

Patent metadata

Field	Value
Publication number	US-9972243-B2
Application number	US-201615387203-A
Country	US
Kind code	B2
Filing date	Dec 21, 2016
Priority date	Dec 28, 2015
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A display device and a method of driving the same are disclosed. The display device includes a first driver integrated circuit configured to drive a first pixel array, a second driver integrated circuit configured to drive a second pixel array, a power module integrated circuit configured to receive an enable signal and output a driving voltage, and an AND gate configured to receive an output of the first driver integrated circuit and an output of the second driver integrated circuit and output the enable signal. The driving voltage output from the power module integrated circuit is commonly supplied to the first and second driver integrated circuits.

First claim

What is claimed is:

1. A display device comprising:
a first driver integrated circuit configured to drive a first pixel array;
a second driver integrated circuit configured to drive a second pixel array;
a power module integrated circuit configured to receive an enable signal and output a driving voltage; and
an AND logic circuit having a first input coupled to an output of the first driver and a second input coupled to an output of the second driver, the AND logic circuit configured to receive an output of the first driver integrated circuit and an output of the second driver integrated circuit and output the enable signal,
wherein the driving voltage output from the power module integrated circuit is commonly supplied to the first and second driver integrated circuits.

2. The display device of claim 1 , wherein the AND logic circuit includes:
a first AND gate configured to receive an output signal output through a first output terminal of the first driver integrated circuit and an output signal output through a first output terminal of the second driver integrated circuit and output a first enable signal; and
a second AND gate configured to receive an output signal output through a second output terminal of the first driver integrated circuit and an output signal output through a second output terminal of the second driver integrated circuit and output a second enable signal,
wherein each of the output signals output through the first and second output terminals includes a plurality of pulses.

3. The display device of claim 2 , wherein the power module integrated circuit outputs a first driving voltage in response to the first enable signal and commonly supplies the first driving voltage to the first and second driver integrated circuits, and
wherein the power module integrated circuit outputs a second driving voltage in response to the second enable signal and commonly supplies the second driving voltage to the first and second driver integrated circuits.

4. The display device of claim 3 , wherein the power module integrated circuit directly receives the output signals output through the first and second output terminals of one of the first and second driver integrated circuits.

5. The display device of claim 4 , wherein the power module integrated circuit includes:
a first step-up converter configured to adjust the first driving voltage depending on a number of pulses of the output signal output through the first output terminal; and
a second step-up converter configured to adjust the second driving voltage depending on a number of pulses of the output signal output through the second output terminal.

6. A method of driving a display device including a first driver integrated circuit driving a first pixel array, a second driver integrated circuit driving a second pixel array, and a power module integrated circuit connected to the first and second driver integrated circuits, the method comprising:
synchronizing an output of the first driver integrated circuit with an output of the second driver integrated circuit using an AND gate to supply the synchronized outputs of the first and second driver integrated circuits to the power module integrated circuit;
outputting a driving voltage from the power module integrated circuit in response to an output of the AND gate; and
supplying the driving voltage to the first and second driver integrated circuits.

7. The method of claim 6 , further comprising:
directly supplying the output of one of the first and second driver integrated circuits to the power module integrated circuit; and
counting pulses of a signal, that is directly received from one of the first and second driver integrated circuits, by the power module integrated circuit to adjust the driving voltage.

8. The method of claim 7 , wherein the synchronizing of the output of the first driver integrated circuit with the output of the second driver integrated circuit using the AND gate to supply the synchronized outputs to the power module integrated circuit includes:
outputting a result of an AND operation of an output signal output through a first output terminal of the first driver integrated circuit and an output signal output through a first output terminal of the second driver integrated circuit using a first AND gate, as a first enable signal, and supplying the first enable signal to a first enable terminal of the power module integrated circuit; and
outputting a result of an AND operation of an output signal output through a second output terminal of the first driver integrated circuit and an output signal output through a second output terminal of the second driver integrated circuit using a second AND gate, as a second enable signal, and supplying the second enable signal to a second enable terminal of the power module integrated circuit,
wherein each of the output signals output through the first and second output terminals includes a plurality of pulses.

9. The method of claim 8 , wherein the outputting of the driving voltage from the power module integrated circuit in response to the output of the AND gate includes:
outputting a first driving voltage from the power module integrated circuit in response to the first enable signal to commonly supply the first driving voltage to the first and second driver integrated circuits; and
outputting a second driving voltage from the power module integrated circuit in response to the second enable signal to commonly supply the second driving voltage to the first and second driver integrated circuits.

10. The method of claim 9 , wherein the directly supplying of the output of one of the first and second driver integrated circuits to the power module integrated circuit includes:
directly supplying the output signal output through the first output terminal of one of the first and second driver integrated circuits to the power module integrated circuit; and
directly supplying the output signal output through the second output terminal of one of the first and second driver integrated circuits to the power module integrated circuit.

11. The method of claim 10 , wherein the counting pulses of the signal, that is directly received from one of the first and second driver integrated circuits, by the power module integrated circuit to adjust the driving voltage includes:
adjusting the first driving voltage depending on a number of pulses of the output signal output through the first output terminal; and
adjusting the second driving voltage depending on a number of pulses of the output signal output through the second output terminal.

12. A personal immersive device comprising:
a first driver integrated circuit configured to drive a first pixel array;
a second driver integrated circuit configured to drive a second pixel array;
a power module integrated circuit configured to receive a synchronization enable signal and output a driving voltage according to the synchronization enable signal; and
an AND logic circuit having a first input coupled to an output of the first driver and a second input coupled to an output of the second driver, the AND logic circuit configured to receive an enable signal output from the first driver and an enable signal output from the second driver and perform an AND operation on the enable signal of the first driver and the enable signal of the second driver received to output the synchronization enable signal,
wherein the driving voltage output from the power module integrated circuit is commonly supplied to the first and second drivers.

13. The personal immersive device of claim 12 , wherein the AND gate includes:
a first AND gate configured to receiv

Assignees

• Lg Display Co Ltd

Inventors

• Lee Unseon
• SHIN Dongyoup

Classifications

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G2330/028

  Generation of voltages supplied to electrode drivers in a matrix display other than LCD · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G3/3233 Primary

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G2360/04

  Display device controller operating with a plurality of display units · CPC title