Invention Grant
- Patent Title: Current programming apparatus, active matrix type display apparatus, and current programming method
- Patent Title (中): 现行编程装置,有源矩阵型显示装置和现行编程方法
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Application No.: US11283743Application Date: 2005-11-22
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Publication No.: US07692643B2Publication Date: 2010-04-06
- Inventor: Somei Kawasaki , Masami Iseki , Fujio Kawano , Takanori Yamashita
- Applicant: Somei Kawasaki , Masami Iseki , Fujio Kawano , Takanori Yamashita
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2004-342126 20041126
- Main IPC: G06F3/038
- IPC: G06F3/038

Abstract:
An active matrix type display apparatus includes a plurality of pixel circuits each having an electroluminescent element EL, a 1st FET to control a current flowing in the EL, and a 2nd FET provided between a gate and a drain of the 1st FET. The plurality of pixel circuits are arranged in a matrix and have every column connected to a data line. The 2nd FET is turned on for a predetermined time period, and an image data current flowing in the data line is supplied to the gate and drain of the 1st FET, thereby writing a current value of the image data current. A preliminary charging circuit is connected to the data line. Before the writing operation in the predetermined time period is expired, a current of a predetermined current value is applied to the image data current so that a gate-source voltage of the 1st FET is equal to or larger than a threshold value.
Public/Granted literature
- US20060114194A1 Current programming apparatus, active matrix type display apparatus, and current programming method Public/Granted day:2006-06-01
Information query
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