Refractive projecting unit possessing light filter

A technology of projection device and filter film, applied in projection devices, optics, optical components, etc., can solve problems such as difficult to identify information, blurred images, poor display quality, etc.
CN1570703AInactive Publication Date: 2005-01-26吕兴增 +1
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Patent Information

Authority / Receiving Office
CN ¡ China
Current Assignee / Owner
吕兴增
Publication Date
2005-01-26
Estimated Expiration
Not applicable ¡ inactive patent

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Abstract

A refraction projection apparatus with filtering film comprises a display unit; a refractor set to polarizedly refract the passing or reflected light from the display unit; a filtering film close to the refractor set; a virtual image forming set to reflect or refract the light source through the refractor set and form reflection light into a virtual image; the refractor set is located between the display unit and virtual image forming set; the refractor set is at an angle Y with the display unit, which is more than zero and less than ninety degrees.
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Description

technical field

[0001] The invention relates to a refraction projection device, especially a refraction projection device suitable for transportation vehicles. Background technique

[0002] The head up display (head up display) projects important driving information at a position close to the eyes looking forward, so that the driver of a traffic vehicle (such as a car) does not need to look down at the dashboard and ignore the traffic ahead during driving. situation, reducing the possibility of accidents. It has been widely used in automobiles and aircrafts.

[0003] The known head-up display device is placed in the space above the dashboard of the car, and is projected onto the windshield of the vehicle to form a real image. However, the real image projected in this way will be directly interfered by external light. In particular, the incident sunlight during the day often causes insufficient contrast of the image projected by the head-up display device, and also include...

Claims

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