Invention Grant
- Patent Title: Angle diversity antispeckling in spot displays
- Patent Title (中): 斑点显示中的角度多样性抗斑斑
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Application No.: US11951663Application Date: 2007-12-06
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Publication No.: US07995258B2Publication Date: 2011-08-09
- Inventor: James Christopher Dunphy
- Applicant: James Christopher Dunphy
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Charles A. Brill; Wade James Brady, III; Frederick J. Telecky, Jr.
- Main IPC: G02B26/08
- IPC: G02B26/08

Abstract:
Improvement of speckling noise is discussed in which a central light beam received at a double-sided mirror is divided into a plurality of sub-beams. An intensity of these sub-beams decays from a second sub-beam to a last sub-beam of the plurality. Each sub-beam is also separated at the double-sided mirror by at least a first length, such as the coherence length or intrinsic divergence, and reflected toward a display screen. The configuration of the double-sided mirror focuses the sub-beams to converge with a first sub-beam on the display screen at different angles. The decreasing intensity and different angles of impact with the screen decreases the spatial coherence of the display light. The angle diversity and combination of multiple sub-beams having different intensities offers a non-time-averaging means to decrease speckle noise without downgrading the beam quality or display resolution.
Public/Granted literature
- US20090147222A1 Angle Diversity Antispeckling in Spot Displays Public/Granted day:2009-06-11
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