Method and system for driving light emitting display

• US RE46,561 E1
• Filed: 09/04/2014
• Issued: 09/26/2017
• Est. Priority Date: 07/29/2008
• Status: Active Grant

• Current Assignee: IGNIS Innovation Incorporated
• Original Assignee: IGNIS Innovation Incorporated
• Inventors: Chaji, Gholamreza, Li, Kongning, Gupta, Vasudha, Nathan, Arokia
• Primary Examiner(s): Saadat, Cameron
• Application Number:
  US14/477,037
• Time in Patent Office: 1,118 Days
• Field of Search: 345690
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2310/0218 with collection of electrodes in groups for n-dimensional addressing
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• CPC Class Codes: G09G 2310/027 Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
• CPC Class Codes: G09G 2310/0286 Details of a shift registers arranged for use in a driving circuit
• CPC Class Codes: G09G 2310/0294 Details of sampling or holding circuits arranged for use in a driver for data electrodes
• CPC Class Codes: G09G 2310/0297 Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: G09G 3/3275 Details of drivers for data electrodes
• CPC Class Codes: G09G 3/3677 suitable for active matrices only
• CPC Class Codes: G09G 3/3688 suitable for active matrices only
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers

Abstract

A display system includes a driver for operating a panel having a plurality of pixels arranged by a plurality of first lines and at least one second line The driver includes a driver output unit for providing to the panel a single driver output for activating the plurality of first lines, the single driver output being demultiplexed on the panel to activate each first line.

Claims

1. A drive system for an a light emitting device (LED) display panel having a multiplicity of LED pixels arranged in rows and columns, each of said LED pixels having a drive transistor that includes a gate, a source and a drain and each of said LED pixels further having an LED coupled to said drive transistor, comprising:

a gate driver having at least one address cell providing a single gate driver output for multiple rows of pixels of said LED display panel,

a gate driver multiplexer and a demultiplexer that includes multiple switch blocks coupled to the gate driver and controllably coupling said single gate driver output to said multiple rows of pixels in sequence so that whenever such that when a selected one of said multiple rows is connected to said single gate driver output, all the other said multiple rows are disconnected from said single-game single-gate driver output.

2. A display system according to claim 1, wherein the gate driver output unit comprises:

at least one multiplexer, the multiplexer for multiplexing driver signals to provide the single gate driver output.

3. A display system according to claim 2, wherein the panel comprises:

a demultiplexer having a plurality of switch blocks for activating the first lines multiple rows, each switch block receiving outputs from the at least one multiplexer.

4. A method of driving a display panel having a multiplicity of pixels arranged in rows and columns, each of said pixels having a drive transistor that includes a gate, a source and a drain, said method comprising:

multiplexing driver signals to generate a single gate driver signal;

providing a single gate driver signal for multiple rows of said pixels of said display panel,

demultiplexing the single gate driver signal by controllably coupling said single gate driver signal to selected ones of said multiple rows of pixels in sequence, and controllably disconnecting said gate driver signal from said multiple rows of pixels to which said single gate driver signal is not coupled.