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EL display device and personal digital device

An electroluminescence display and digital data technology, applied in the direction of electroluminescence light sources, electric light sources, lighting devices, etc., can solve the problems of uneven brightness of red, green and blue light, low brightness, unsatisfactory white balance, etc.

Inactive Publication Date: 2010-06-16
SEMICON ENERGY LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this case, the red light itself of the image displayed on the EL display device is also low in brightness, and the image that wants to be displayed in red is displayed in orange, so that only red, green, and blue luminous brightness can be provided. Display units with unsatisfactory balance

Method used

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  • EL display device and personal digital device
  • EL display device and personal digital device
  • EL display device and personal digital device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0076] An embodiment of the present invention is described below.

[0077] see Figure 5 , which is a schematic block diagram of an EL display device, the driving circuit of the EL display device adopts the driving method of the present invention.

[0078] In this embodiment, 6-bit digital data having red, green and blue image information (gray scale information) respectively is input from the outside. It should be noted that, as mentioned above, n-bit digital data with red, green and blue image information (gray scale information) can also be input from the outside.

[0079] First, in the present invention Figure 5 In the shown EL display device, the pixel portion 101 and the driver circuit 102 on the data signal side and the driver circuit 103 on the gate signal side (both driver circuits 102 and 103 are arranged on the periphery of the pixel portion 101) are all A TFT is formed on the substrate. It should be noted that a pair of such driver circuits 102 on the data sig...

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PUM

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Abstract

The present invention is characterized by adding a bit having the value of one below the least significant bit of n bit digital data having red image information inputted from the external, adding a bit having the value of zero above the most significant bit of n bit digital data having green image information inputted from the external, and adding a bit having the value of zero above the most significant bit of n bit digital data having blue image information inputted from the external, whereby producing (n+1) bit digital data having red image information, (n+1) bit digital data having greenimage information, and (n+1) bit digital data having blue image information, respectively, for displaying an image.

Description

[0001] The application of the present invention is a divisional application of the patent application with the filing date of September 23, 2000, the application number of 00128858.X, and the invention title of "Electroluminescent Display Device and Its Driving Method". technical field [0002] The present invention relates to a method of driving an EL (Electro Luminescence) display device, a circuit for implementing such a driving method, and an EL display device having such a driving circuit. Background technique [0003] In recent years, the technology of manufacturing TFT (Thin Film Transistor) on the substrate has made extensive progress, and the development of TFT applied to active matrix display devices is in progress. In particular, TFTs using polysilicon films have higher electric field effect mobility than TFTs using general amorphous silicon films, so they can work at high speeds, so that the pixel control usually performed by the driver circuit outside the substra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32H05B33/08G09G3/30G09G3/20G09G5/02G09G5/04H05B44/00
CPCG09G3/32G09G2300/0842G09G3/3275G09G2300/0809G09G3/20G09G2320/0242G09G3/2037G09G3/2018G09G5/04G09G2320/0673G09G5/02G09G3/3258G09G2320/0666G09G3/2022G09G3/30
Inventor 小山润
Owner SEMICON ENERGY LAB CO LTD