Insertion of a thin film of aluminum oxide (Al 2 O 3 ) at the interface of electrodes and organic layers has been investigated. Insertion of a thin film of Al 2 O 3 at the interface of the ITO anode and the diamine derivative (TPD) layers, as well as at the interface of the 8-hydroxyquinoline aluminum (Alq 3 ) and the Mg:Ag cathode in the electroluminescent (EL) diode has been examined. The insertion of an Al 2 O 3 layer with a proper thickness was observed to enhances the emission efficiency of the device. The mechanism of quantum efficiency enhancement of the device was studied.
We have developed a new LCD having optical input function usable under high ambient-light conditions. Sensors having different sensitivities are dispersed in the panel, and a sensor driver circuit to control the sensor exposure time are formed monolithically in peripheral using LTPS technology. These two approaches contribute synergistically to widen the range of ambient light condition available for the input function.
A new display in which an input function is incorporated has been developed by using LTPS TFT technology. A new circuit configuration that includes a lateral p-i-n diode with an in-pixel amplifier, an LTPS A/D converter on the periphery of the glass substrate and an external image-processing LSI is presented. The experimental results of two major applications of the image-capture function and touch-panel function are discussed. FIGURE 1 -Fabrication process for LTPS TFTs and the optical sensor.
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