# US 8,570,313 B2 · Display panel driver

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,570,313 B2
- Document ID: US8570313B2
- Status: Granted
- Kind: B2
- Application number: 12/662,627
- Filed: 2010-04-26
- Published: 2010-10-28
- Granted: 2013-10-29
- Earliest claimed: 2009-04-27
- Assignees: Renesas Electronics Corporation
- Applicants: Kouichi Nishimura
- Inventors: Kouichi Nishimura
- Web page: https://patentgrep.com/patent/US8570313B2

## CPC

- G09G 3/3688: {suitable for active matrices only}
- G09G 3/3614: {Control of polarity reversal in general}
- G09G 2320/0223: Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
- G09G 2330/04: Display protection
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

A display panel driver is provided with: first and second amplifiers; first to n-th even output nodes, n being an integer of two or more; first to n-th odd output nodes; first and second output pads connected to data lines of a display panel, respectively; first to n-th switch blocks; first to n-th even electrostatic protection resistors; and first to n-th odd electrostatic protection resistors. The i-th switch block out of the first to n-th switch blocks is configured to switch connections between the first and second amplifiers and i-th even and odd electrostatic protection resistors out of the first to n-th even and odd electrostatic protection resistors. The first to n-th even electrostatic protection resistors are connected between the first to n-th even output nodes and the first output pad, respectively. The first to n-th odd electrostatic protection resistors are connected between the first to n-th odd output nodes and the second output pad, respectively.

## Claims

### Claim 1

A display panel driver, comprising:
first and second amplifiers;
first to n-th even output nodes, n being an integer of two or more;
first to n-th odd output nodes;
first and second output pads connected to data lines of a display panel, respectively;
first to n-th switch blocks;
first to n-th even electrostatic protection resistors; and
first to n-th odd electrostatic protection resistors,
wherein an i-th switch block out of said first to n-th switch blocks is configured to switch connections between said first and second amplifiers and i-th even and odd electrostatic protection resistors out of said first to n-th even and odd electrostatic protection resistors,
wherein said first to n-th even electrostatic protection resistors are connected between said first to n-th even output nodes and said first output pad, respectively, and
wherein said first to n-th odd electrostatic protection resistors are connected between said first to n-th odd output nodes and said second output pad, respectively.

### Claim 2 (depends on 1)

The display panel driver according to claim 1, wherein said first amplifier is configured to generate a drive voltage lower than a common voltage fed to an opposite electrode of said display panel;
wherein said second amplifier is configured to generate a drive voltage higher than said common voltage;
wherein said i-th switch block includes:
a first switch connected between said first amplifier and said i-th even output node;
a second switch connected between said second amplifier and said i-th odd output node;
a third switch connected between said first amplifier and said i-th odd output node; and
a fourth switch connected between said second amplifier and said i-th even output node.

### Claim 3 (depends on 1)

The display panel driver according to claim 1, further comprising:
first to n-th charge collecting switch blocks; and
a common line,
wherein an i-th charge collecting switch block out of said first to n-th charge collecting switch blocks includes:
a fifth switch connected between said i-th even output node and said i-th odd output node;
a sixth switch connected between said i-th odd output node and said common line; and
a seventh switch connected between said i-th even output node and said common line.

### Claim 4 (depends on 1)

The display panel driver according to claim 1, further comprising a cross switch block connected between said first and second amplifiers and first and second D/A converters,
wherein said first and second amplifiers each provide a rail-to-rail operation,
wherein said cross switch block is configured to switch connections between outputs of said first and second D/A converters and inputs of said first and second amplifiers, and
wherein said i-th switch block includes:
a first switch connected between said first amplifier and said i-th even output node; and
a second switch connected between said second amplifier and said i-th odd output node.