Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-03-14
1997-05-20
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 79, 3151693, G09G 330
Patent
active
056316640
ABSTRACT:
A plurality of electrical light-emitting surface light source elements are arranged in a matrix form on a semiconductor substrate. Each of the surface light source elements has a ferroelectric capacitor portion and an electrical light-emitting portion. The capacitor portion has a lower electrode formed on the substrate, a ferroelectric thin film formed on the lower electrode, and an upper electrode formed on the thin film with an electron emission hole. The light-emitting portion has a carrier acceleration/multiplication layer formed on the upper electrode by a semiconductor layer, a light-emitting layer formed on the acceleration/multiplication layer, and a transparent electrode formed on the light-emitting layer. A plurality of switching elements are formed on the substrate in correspondence with the surface light source elements. A voltage applied across the upper and lower electrodes of the capacitor portion of a corresponding one of the surface light source elements according to a drive signal selectively supplied to the switching elements is inverted. Electrons emitted from the electron emission hole by polarization reversal generated in the thin film are injected in the light-emitting portion through the acceleration/multiplication layer to cause the light-emitting portion to selectively emit light, thereby obtaining visible light through the transparent electrode.
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Adachi Hideo
Mihara Takashi
Hjerpe Richard
Lao Lun-Yi
Olympus Optical Co,. Ltd.
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