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Electronic device drive method, electronic device, semiconductor integrated circuit, and electronic apparatus

A technology of electronic devices and driving methods, applied in the direction of circuit breaking switches, circuits, lighting devices, etc. with excessive current, can solve problems such as slow response time and difficulty in maintaining the written value correctly

Inactive Publication Date: 2005-05-25
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if you want to write a small current from the driver in the corresponding LT-TFT circuit including the analog memory of each pixel, due to the slow response time of the LT-TFT and the existence of leakage current, it will appear in the required given When the periodical refresh operation of the display cannot be completed within a fixed writing time, and when it is difficult to maintain the written value correctly

Method used

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  • Electronic device drive method, electronic device, semiconductor integrated circuit, and electronic apparatus
  • Electronic device drive method, electronic device, semiconductor integrated circuit, and electronic apparatus
  • Electronic device drive method, electronic device, semiconductor integrated circuit, and electronic apparatus

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no. 1 Embodiment approach

[0065] The first embodiment of the present invention will be described below. In this embodiment, an organic EL display device and a method for controlling grayscale display thereof will be described as an example of the electronic device and its driving method according to the present invention.

[0066] The current block diagram of an organic EL display device is shown in figure 1 As shown, it includes a pixel matrix unit 10 for display, a vertical scanning driving circuit 20 attached thereto, a scanning signal differential generation circuit 30, and a driver ( Gray scale control) circuit 40.

[0067] The display pixel matrix unit 10 used as an organic EL element as a light-emitting element is formed by arranging unit pixels including organic EL elements in a matrix as is well known. As the circuit configuration and operation of the unit pixel, for example, as described in the book titled "Electronic Display" (by Matsumoto Shoichi, published by Ohm Corporation, June 20, 20...

no. 2 Embodiment approach

[0088] A second embodiment of the present invention will be described below along with the drawings. In this embodiment, the electronic device and its driving method related to the present invention are an organic EL display device and its driving method, and an organic EL display device and its method of controlling the effective brightness (brightness) of the screen will be described as an example. .

[0089] exist Figure 8 Among them, the organic EL display device 50 includes a display panel 51 , a write-in scan line drive circuit 52 , a display-off scan line drive circuit 53 , a data line drive circuit 54 , and a control circuit 55 .

[0090] The display unit 51 , writing scanning line driving circuit 52 , display off scanning line driving circuit 53 , data line driving circuit 54 and control circuit 55 of the organic EL display device 50 can be composed of independent electronic components. For example, the writing scanning line driving circuit 52, the display off scan...

no. 3 Embodiment approach

[0116] A third embodiment of the present invention will be described below along with the drawings. In this embodiment, the electronic device and its driving method related to the present invention are an organic EL display device and its driving method, and an organic EL display device and its method of controlling the effective brightness (brightness) of the screen will be described as an example. . Compared with the second embodiment, this embodiment is characterized in that the circuit configuration of the pixel circuit and the timing of the light emission period TS are different. Therefore, for the convenience of description, only the characteristic parts will be described in detail.

[0117] Figure 12 The pixel circuit 7 shown, like the above-mentioned embodiment, shows two data lines Xm disposed on the points of the mth data line Xm, the nth scanning line Yn for writing, and the scanning line YSn for display cutoff. , Another example of the pixel circuit connected b...

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PUM

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Abstract

A display device comprising a plurality of scanning lines, a plurality of data lines, and current-driven elements arranged correspondingly to intersections of the scanning lines and signal lines, and performing a display operation according to the amount of driving current supplied to the current-driven elements . The amount of drive current is determined by the value of the drive current and the length of the period during which the periodically repeated drive current is supplied to the current drive element. By determining the amount of drive current in this way, accurate gradation control and reduction in power consumption of the display device can be achieved in the minute current region.

Description

technical field [0001] The present invention relates to a driving method of an electronic device, an electronic device, a semiconductor integrated circuit and an electronic machine. Background technique [0002] An electroluminescent element (hereinafter referred to as an organic EL element regardless of the type of light emitting material) that emits light by flowing a driving current into a light emitting film such as an organic semiconductor, or a fluorescent display tube element (hereinafter referred to as a VFD element), Low-temperature polysilicon thin-film transistors (hereinafter referred to as LT-TFT) are used for electroluminescent elements, light-emitting diodes (LED elements), laser elements such as surface emitting lasers (VCSEL), and current-controlled thin-film light-emitting elements such as field emission elements (FED). , silicon integrated circuits, or organic transistor drive-controlled active matrix type image display devices have been proposed. The dri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G09G3/30G09G3/32G09G3/36H01H73/00H05B33/14
CPCG09G3/2022G09G3/2081G09G3/30G09G3/32G09G3/3241G09G3/325G09G2300/0417G09G2300/0842G09G2300/0861G09G2310/0224G09G2320/0271G09G2320/0606G09G2320/0626G09G2320/0666
Inventor 今村阳一
Owner SEIKO EPSON CORP