Self-emission type display device

A display device and self-illumination technology, applied in identification devices, lighting devices, electroluminescent light sources, etc., can solve the problems of no specific record, no record structure, no consideration of circuit scale, etc., to achieve stable luminous brightness, reduce capacity, Effect of reduced load capacity

Active Publication Date: 2009-12-30
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although the technology of Japanese Patent Application Laid-Open No. 2004-287345 has a description that an ADC (Analog-to-Digital Converter: Analog-to-Digital Converter) as a current detection circuit and a storage capacitor for storing the result are provided for each pixel column, However, the specific structure is not described, especially the circuit scale which is greatly related to the accuracy of the correction is not considered.
In addition, there is no specific description of data correction based on the above-mentioned current detection results.

Method used

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  • Self-emission type display device

Examples

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no. 1 approach

[0028] figure 1 It is an example of a self-luminous element display device as one embodiment of the present invention. figure 1 Among them, 1 is the display signal, 2 is the current fluctuation compensation function built-in data line driving circuit, 3 is the data line driving signal, 4 is the light-emitting power supply voltage, 5 is the scanning line control signal, and the current fluctuation compensation function built-in data line driving circuit 2 is based on The display signal 1 generates a data line drive signal 3 for supplying a grayscale voltage to a self-luminous element display (described later) and a light-emitting power supply voltage 4 for supplying a power supply voltage for emitting light to a self-luminous element, and outputs it to a self-luminous element display (described later) In addition, a scanning line control signal 5 for selecting and controlling a vertical scanning line to which the gray scale voltage is applied is generated and output to a scanni...

Embodiment 2

[0057] Next, a second embodiment of the present invention will be described in detail using the drawings.

[0058] Figure 9 This is an example of a self-luminous element display device according to an embodiment of the present invention. Figure 9 in, endowed with figure 1 The parts with the same reference numerals are the same as those of the first embodiment, and perform the same operations. 92 is a data line drive circuit with a built-in repetitive compensation function for current fluctuations, and 93 is a data line drive signal for repetitive compensation for current fluctuations. The data line drive circuit 92 with a built-in repetitive compensation function for current fluctuations operates substantially the same as in the first embodiment, and is characterized in that In the first embodiment, the number of corrections for screen sticking is one, and the data line drive circuit 92 with a built-in current fluctuation repetitive compensation function performs correctio...

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Abstract

To provide a self-luminous display device which is decreased in circuit scale of an ADC and a data correcting circuit and can obtain burning correction effect. A current comparing circuit 47 in a data line driving circuit 2 with an internal current compensating function detects only a result of large / small comparison of a current capacity in case of deterioration of a self-luminous element with a reference value, a state wherein the current capacity decreases below the reference value is added to a low-order bit of a storage circuit 30 for display data and stored, and a D / A converting circuit 41 generates a write signal voltage according to display data read out of the storage circuit 30.

Description

technical field [0001] The present invention relates to a display device including an EL (Electroluminescence) element, an organic EL element, and other self-luminous display elements which are self-luminous display elements, and a driving method thereof. Background technique [0002] In self-luminous elements represented by EL (Electroluminescence) elements and organic EL elements, etc., there is a property that the luminous brightness is proportional to the amount of current flowing in the self-luminous element. The amount of current can be displayed in grayscale. A display device can be produced by arranging a plurality of self-luminous elements as described above. [0003] However, when the self-luminous element is used for a long period of time, the deterioration of the self-luminous element progresses over time, and the luminance of the self-luminous element decreases, and the degree of this deterioration depends on the luminous time. Therefore, according to the ligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/30G09G3/32G09G3/20H05B33/08H05B33/14H05B37/02G09F9/33H01L27/32H01L51/50H05B44/00
CPCG09G2300/0842G09G2320/043G09G2340/16G09G2320/029G09G3/3233G09G3/006
Inventor 笠井成彦秋元肇佐藤敏浩
Owner SAMSUNG DISPLAY CO LTD
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