Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2004-11-23
2010-10-19
Mengistu, Amare (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C315S169300
Reexamination Certificate
active
07817114
ABSTRACT:
A display apparatus includes a plurality of pixel circuits, wherein each of the pixel circuits comprises a light emitting element, a drive transistor for supplying the light emitting element with a current, as a driving current, of a quantity corresponding to a potential between a gate and a source of the drive transistor, a first switch for controlling a flow of the current supplied to the light emitting element, a second switch for switching between a first state of setting the potential between the gate and the source of the drive transistor and a second state of holding the potential between the gate and the source of the drive transistor, and a circuit for supplying the first switch with a signal for switching a state of controlling the flowing of the current of the driving current. In addition, a circuit supplies the second switch with a signal for switching the second switch between the first and second states, and a circuit sets the potential between the gate and the source of the driving transistor at a potential to flow the driving current so as to set the light emitting element at a low level driving state, at a time of starting a power source or a waiting state of the power source, and under a state that the first switch suppresses the flowing of the driving current and the second switch is at the first state.
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European Search Report dated Jan. 4, 2010, in related corresponding European Patent Appln. No. 04028622.1.
Iseki Masami
Kawano Fujio
Kawasaki Somei
Yamashita Takanori
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Mengistu Amare
Zubajlo Jennifer
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