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Display panel drive circuit

A technology for driving circuits and display panels, used in circuits, electric light sources, electrical components, etc., can solve problems such as differences in the tendency of output current, influence of voltage drop of long wires, and differences

Inactive Publication Date: 2006-01-25
ASAHI KASEI ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0048] However, this circuit, in which the distance between the bias section and the DAC section is different for each channel, has to be set in the IC chip by V th Tendency to affect and be affected by voltage drop due to long wires such disadvantages
In this case, the difference in tendency of the output current in the IC chip due to this different composition

Method used

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Embodiment Construction

[0132] Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, the same parts in different drawings are denoted by the same reference numerals / characters.

[0133] Figure 14 is a schematic diagram showing the main parts of the first embodiment of the display panel driving circuit according to the present invention. As shown, the display panel driving circuit according to this embodiment includes a first IC chip 2a and a second IC chip 2b.

[0134] The first IC chip 2a has drive outputs corresponding to channels 1 to N+1. The drive outputs corresponding to channels 1 to N-1 are supplied to the anode line A 1 to A N-1 to drive the anode line corresponding to A 1 to A N-1 pixel elements.

[0135] In addition, the second IC chip 2b has drive outputs corresponding to channels N to m, and drive outputs corresponding to channels N+2 to m are supplied to the anode line A N+2 to A m to drive the a...

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Abstract

The present invention relates to an anode line drive circuit that is constructed with a plurality of IC chips in a display panel drive circuit, so as to reduce the deterioration of image quality. A scheduled cycle is adopted to switch the virtual drive output and the appropriate drive output of an adjacent IC chip so as to provide the output for an anode line, thus possibly reducing the difference between the adjacent output currents of each IC chip. And the present invention can reduce the brightness difference in each display area that is caused by the difference of the current drive capability between the IC chips, so as to reduce the deterioration of image quality when the anode line drive circuit comprises a plurality of IC chips.

Description

[0001] This application is a divisional application of Chinese patent application 02802977.1 with a filing date of August 22, 2002. technical field [0002] The present invention relates to a driving circuit for a display panel, and more particularly, to a driving circuit for a display panel composed of self-luminous elements such as electroluminescent elements. Electroluminescent elements include organic electroluminescent elements and inorganic electroluminescent elements. The present invention is applicable to both. Background technique [0003] An organic electroluminescent (hereinafter referred to as EL) element is considered as a self-luminous element for realizing a thin, low power consumption display device. A display device using an EL element and a driving circuit thereof are described in Japanese Patent Laid-Open No. 2001-42821. [0004] figure 1 A schematic structure of such an EL element is given. As shown in the figure, the EL element is formed by laminatin...

Claims

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Application Information

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IPC IPC(8): G09G3/30H05B33/08H01L51/50G09G3/20G09G3/36H05B33/14H05B44/00
Inventor 竹原聪山羽羲郎
Owner ASAHI KASEI ELECTRONICS CO LTD
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