Invention Grant
- Patent Title: Video display device and operating method therefore
- Patent Title (中): 因此,视频显示设备和操作方法
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Application No.: US11805028Application Date: 2007-05-22
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Publication No.: US08063854B2Publication Date: 2011-11-22
- Inventor: Philippe Le Roy , Pierrick Martin , Dominique Gagnot
- Applicant: Philippe Le Roy , Pierrick Martin , Dominique Gagnot
- Applicant Address: FR Boulogne-Billancourt
- Assignee: Thomson Licensing
- Current Assignee: Thomson Licensing
- Current Assignee Address: FR Boulogne-Billancourt
- Agent Robert D. Shedd; Jeffrey M. Navon
- Priority: EP06300542 20060601
- Main IPC: G09G3/30
- IPC: G09G3/30

Abstract:
A video display device comprises a plurality of light emitting elements arranged in a matrix having rows and columns; a plurality of first current modulators each of which is associated to one of said light emitting elements for drawing a feed current of programmable intensity for the associated light emitting element from a circuit node associated to each of said columns; a current generator controlled by video data representative of desired luminosities of said light emitting elements for supplying a first current (IDATA)to said circuit node, the intensity of which is representative of a desired luminosity of at least one of said light emitting elements; the circuit node having a specific voltage level when the intensity supplied by said current generator is drawn from the current node by the first current modulator associated to said at least one light emitting element; a second current modulator for supplying a second current (I10) to said circuit node; a comparator having inputs connected to said circuit node and to a reference terminal which is constantly held at said specific voltage level and an output connected to a control input of said second current modulator, whereby the second current (I10) from said second current modulator is controlled so as to yield said specific voltage level at the circuit node.
Public/Granted literature
- US20070296717A1 Video display device and operating method therefore Public/Granted day:2007-12-27
Information query
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