DISPLAY DEVICE AND ELECTRONIC DEVICE USING THE SAME

• US 20120056558A1
• Filed: 08/24/2011
• Published: 03/08/2012
• Est. Priority Date: 09/02/2010
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: Chi Mei Innolux Corporation (InnoLux Corporation)
• Inventors: Toshiya, Inada, Nagai, Hajime
• Application Number:
  US13/216,622
• Publication Number:
  US 20120056558A1
• Time in Patent Office: Days
• US Class Current: 315/294
• CPC Class Codes: G09G 2300/0804 Sub-multiplexed active matrix panel, i.e. wherein one active driving circuit is used at pixel level for multiple image producing elements
• CPC Class Codes: G09G 2300/0833 forming a linear amplifier or follower
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3659 the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

The invention provides a low-power consumption display device. The display device 10 is provided with a plurality of pixels P₁₁˜P_nm arranged in a matrix formed by columns and rows, and a plurality of signal lines 16-1˜16-m arranged corresponding to every pixel rows or pixel columns. The display device further comprises a signal voltage generating part 12 electrically connected to the plurality of pixels P₁₁˜P_nm via the plurality of signal lines 16-1˜16-m and generating signal voltages which are applied to the plurality of signal lines 16-1˜16-m, and a signal voltage amplifying part 14 amplifying the signal voltage generated by the signal voltage generating part 12 to a necessary drive voltage for each of the plurality of pixels P₁₁˜P_nm.

Claims

1. A display device, comprising:

a plurality of pixels arranged in a matrix formed by rows and columns;

a plurality of signal lines arranged corresponding to each pixel row or each pixel column, respectively;

a signal voltage generating part connected to the plurality of pixels via the plurality of signal lines, for generating a signal voltage to be applied to each of the plurality of signal lines; and

a signal voltage amplifying part for amplifying the signal voltage generated by the signal voltage generating part to a necessary drive voltage for each of the plurality of pixels.

2. The display device as claimed in claim 1, further comprising:

a display panel divided into the plurality of pixels, wherein the display panel has a substrate where a circuit is formed, and the circuit is disposed corresponding to each of the plurality of pixels to control the driving of the pixel,

wherein the signal voltage generating part is comprised in a driver integrated circuit disposed outside of the display panel, and

the signal voltage amplifying part is formed together with the circuit on the substrate.

3. The display device as claimed in claim 1 or claim 2, wherein the signal voltage amplifying part is formed in each of the plurality of pixels.

4. The display device as claimed in claim 3, wherein in the case where each of the plurality of pixels having the signal voltage amplifying part is divided into a plurality of sub pixels, the signal voltage amplifying part comprises a voltage distribution part disposed at an output terminal of the signal voltage amplifying part, wherein the voltage distribution part distributes the signal voltage amplified by the signal voltage amplifying part to the plurality of sub pixels.

5. The display device as claimed in claim 4, wherein the voltage distribution part comprises a demultiplexer.

6. The display device as claimed in claim 5, wherein the signal voltage amplifying part is disposed on each of the plurality of signal lines.

7. The display device as claimed in claim 1 or claim 2, wherein the signal voltage amplifying part is an amplifying circuit having an operational amplifier.

8. The display device as claimed in claim 1 or claim 2, wherein the signal voltage amplifying part is a charge pump circuit.

9. The display device as claimed in claim 1 or claim 2, further comprising:

a capacity storage capacitor formed in each of the plurality of pixels, for holding the drive voltage applied to the pixel;

a plurality of capacity storage lines arranged corresponding to each of the pixel rows or each of the pixel columns and connected to the capacity storage capacitor; and

a capacity storage line driver for driving the plurality of capacity storage lines in synchronization with the driving of each of the plurality of pixels.

10. The display device as claimed in claim 1 or claim 2, wherein the display device is an LCD device, an OLED device, or electronic paper.

11. An electronic device, comprising the display device as claimed in claim 1 or claim 2.