Invention Grant
- Patent Title: Techniques for dual modulation with light conversion
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Application No.: US15505432Application Date: 2015-08-20
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Publication No.: US09810944B2Publication Date: 2017-11-07
- Inventor: Chun Chi Wan , Ajit Ninan
- Applicant: Dolby Laboratories Licensing Corporation
- Applicant Address: US CA San Francisco
- Assignee: Dolby Laboratories Licensing Corporation
- Current Assignee: Dolby Laboratories Licensing Corporation
- Current Assignee Address: US CA San Francisco
- International Application: PCT/US2015/046074 WO 20150820
- International Announcement: WO2016/028994 WO 20160225
- Main IPC: G09G3/36
- IPC: G09G3/36 ; G02F1/1335 ; G09G3/34

Abstract:
Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light, such as blue or ultraviolet light, into second light, such as white light. The light conversion layer can include quantum dot materials. Liquid crystal display (LCD) modulation drive signals are generated to determine transmission of the second light through individual color subpixels of the display. These LCD modulation drive signals can be adjusted based on one or more light field simulations to account for non-uniform, spatial color shifts. Alternatively, one or more light field simulations based on a uniformity assumption determine intermediate LCD modulation drive signals. A compensation field simulation, using backlight drive signals, is then used to adjust the intermediate LCD modulation drive signal for color correction.
Public/Granted literature
- US20170242301A1 Techniques for Dual Modulation with Light Conversion Public/Granted day:2017-08-24
Information query
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