Organic electroluminescent display drive system and mobile communication terminal using same

A technology for mobile communication terminals and display drivers, which can be used in electroluminescent light sources, wireless communications, light sources, etc., and can solve problems such as shortening the use time

Inactive Publication Date: 2002-07-24
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on a mobile communication terminal, power is supplied from a power source with a limited capacity, such as a battery; therefore, there is a problem that the usable time of the mobile communication terminal becomes shorter

Method used

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  • Organic electroluminescent display drive system and mobile communication terminal using same
  • Organic electroluminescent display drive system and mobile communication terminal using same
  • Organic electroluminescent display drive system and mobile communication terminal using same

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Embodiment Construction

[0016] An organic electroluminescent display driving system and a mobile communication terminal using the same will be explained in an embodiment of the present invention, in which power consumption of a mobile communication terminal using an organic electroluminescent display can be reduced. The organic electroluminescent display driving system mainly has an organic electroluminescent display as a display of a mobile communication terminal, a power supply for the organic electroluminescent display, a light sensor provided on the surface around and near the organic electroluminescent display, An analog-to-digital converter (ADC) that converts an analog voltage generated in the light sensor into a digital voltage, and a voltage controller that controls a power supply for an organic electroluminescence display according to a voltage output from the ADC.

[0017] In this organic electroluminescent display drive system, the brightness of the organic electroluminescent display of th...

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Abstract

An organic EL display driving system and a mobile communication terminal used this system, in which the power consumption of the organic EL display is reduced without damaging the visuality of the displaying contents on the organic EL display, are provided. The organic EL display driving system provides a measuring means that measures the amount of incident light to an organic EL display, which emits light spontaneously, from the outside, and a power supply voltage controlling means that controls the power supply voltage for the organic EL display so that the power supply voltage is increased when the amount of the incident light is large, and the power supply voltage is decreased when the amount of the incident light is small.

Description

technical field [0001] The invention relates to an organic electroluminescence (EL) display driving system and a mobile communication terminal using the system. Background technique [0002] As a display of a mobile communication terminal, liquid crystal displays (LCDs) are mainly used. However, LCDs have several problems. For example, LCD requires a backlight, has a narrow viewing angle for the user, and is not suitable for displaying moving images because of its slow response speed. Organic electroluminescent displays, on the other hand, do not require backlighting because they emit light spontaneously, have a wide user viewing angle, and are suitable for displaying moving images because of their fast response. Therefore, such organic electroluminescent displays have attracted attention. [0003] However, if the organic electroluminescent display is used as a display of a mobile communication terminal, the organic electroluminescent display needs to use a voltage much h...

Claims

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Application Information

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IPC IPC(8): H05B44/00G09G3/20G09G3/30G09G3/32H01L51/50H04M1/73
CPCG09G3/3208H04W52/027G09G2330/021G09G2320/0626Y02B60/50G09G2360/144Y02D30/70
Inventor 中村政文
Owner NEC CORP
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