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Organic light emitting diode display

A technology of light-emitting diodes and displays, used in static indicators, electroluminescent light sources, instruments, etc.

Inactive Publication Date: 2006-10-18
SAMSUNG MOBILE DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, conventional gamma correction methods using a single predetermined gamma correction value cannot achieve optimal gamma correction for SOP-type OLED displays

Method used

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  • Organic light emitting diode display
  • Organic light emitting diode display
  • Organic light emitting diode display

Examples

Experimental program
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Embodiment Construction

[0031] An organic light emitting diode (OLED) display according to an embodiment of the present invention is described in detail with reference to the accompanying drawings. In the figures, identical reference numbers indicate identical or functionally similar elements.

[0032] figure 1 is a schematic top view of an OLED according to an embodiment. exist figure 1 Among them, an OLED display includes a display screen 100, a data driver 200, a reference voltage generator 300, a shift register 400, a level shifter and output buffer 500, and a DC / DC converter 600, all of which are formed on the same substrate . The shift register 400 and the level shifter and output buffer 500 are also collectively referred to as a scan driver.

[0033] The display screen 100 includes a plurality of scan lines S1-Sn extending along the horizontal direction and a plurality of data lines D1-Dm extending along the vertical direction. The sub-pixels are formed at intersections of the scan lines ...

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PUM

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Abstract

An OLED display device which has a peripheral circuit and a display area on the same substrate and provides enhanced gamma correction is disclosed. The OLED display includes a plurality of pixels, a resistor ladder, a predetermined number of voltage selectors, and a data driver, all of which are formed on the same substrate. The resistor ladder includes a plurality of resistors arranged in series between a highest reference voltage and a lowest reference voltage. Each of the voltage selectors includes a plurality of switches coupled to the resistor ladder at a plurality of nodes such that a reference voltage is selected from a plurality of voltages. The data driver is configured to convert a grayscale video signal to a data voltage using the selected reference voltage and to transmit the data voltage to one of the pixels.

Description

technical field [0001] The present invention relates to organic light emitting diode (OLED) displays. More specifically, the present invention relates to OLED display devices with enhanced gamma correction and brightness. Background technique [0002] Recently, liquid crystals and electroluminescent organic materials are widely used in flat panel displays. Such flat panel display devices generally adopt an active matrix method to drive the display device. The active matrix method is a driving method using active elements such as transistors. [0003] Thin film transistors (TFTs) have been widely used as active elements of flat panel displays. TFTs are typically formed on an insulating substrate. Some peripheral circuits such as drivers are formed outside the display area of ​​the insulating substrate. A system with a display and peripheral circuits (such as a driver) on the same insulating substrate is called a system-on-panel (SOP, system-on-panel). [0004] Typically...

Claims

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Application Information

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IPC IPC(8): G09G3/32G09G3/20G09G3/30H05B33/14H05B44/00
CPCG09G3/3291G09G2300/0408G09G2310/027G09G2320/0242G09G2320/0666G09G2320/0673G09G2330/028G09G2360/144G09G3/30
Inventor 朴镕盛松枝洋二郎崔相武
Owner SAMSUNG MOBILE DISPLAY CO LTD
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