Invention Grant
US08350803B2 Display apparatus with a display device and method of driving the display device
失效
具有显示装置的显示装置和驱动显示装置的方法
- Patent Title: Display apparatus with a display device and method of driving the display device
- Patent Title (中): 具有显示装置的显示装置和驱动显示装置的方法
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Application No.: US13205303Application Date: 2011-08-08
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Publication No.: US08350803B2Publication Date: 2013-01-08
- Inventor: Mark Thomas Johnson
- Applicant: Mark Thomas Johnson
- Applicant Address: US CA Sunnyvale
- Assignee: Intertrust Technologies Corp.
- Current Assignee: Intertrust Technologies Corp.
- Current Assignee Address: US CA Sunnyvale
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner LLP
- Priority: EP02079282 20021016
- Main IPC: G09G3/34
- IPC: G09G3/34

Abstract:
A display apparatus (1) comprises a matrix display device (DD) with pixels (10) wherein particles (14) move in a fluid (13) between electrodes (6, 6′, 7). An optical state of the pixels (10) is defined by a value of a drive voltage (VDi) and a duration (Di) of a drive period (TDi) during which the drive voltage (VDi) is present across the pixel (10). A DC-balancing circuit (3) controls the amplitudes of the drive voltages (VDi) and/or durations (Di) of drive periods (TDi) to obtain a substantially zero time-average value (N) across each pixel (10) or across each sub-group of pixels. This control of the amplitude of the drive voltages (VDi) and/or the duration (Di) of the drive periods (TDi) allows minimizing the image retention, without requiring reset pulses causing all pixels (10) to become temporarily white or black. In a preferred embodiment in accordance with the invention, a display device (DD) is used in which a drive voltage (VDi) is supplied to the pixel (10) with a level such that the grey level (or the amount of colorization) does not change anymore after an initial period of time. Now, if applicable, the DC-balancing can be performed by making the duration (Di) of the drive periods (TDi) longer than the initial period of time.
Public/Granted literature
- US20110292026A1 Display Apparatus with a Display Device and Method of Driving the Display Device Public/Granted day:2011-12-01
Information query
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