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Aplanatic lighted three-lens projecting display

A projection display, three-lens technology, applied in the direction of using the image reproducer, optics, optical components of the projection device, etc., can solve the problems of different condensers, uneven illumination, and many types of components.

Inactive Publication Date: 2003-03-19
普基亚光电股份有限公司
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  • Abstract
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Problems solved by technology

[0007] The disadvantage of the conventional three-lens liquid crystal projection display device with non-equal optical path illumination is that the three condenser lenses 151, 152, and 153 are not the same, and three different extension lenses 141, 142, and 143 must be configured. There are many types of components used in the overall device
In addition, the setting of the extension lenses 141, 142, 143 is easy to produce such as figure 2 The illuminated area 191 shown should be a normal square illuminated area, but the illuminance is uneven due to the distortion and aberration at the four corners, so there is a need for improvement

Method used

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Examples

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Embodiment Construction

[0026] Cooperate image 3 , 4 5 and 5 are schematic diagrams of the three-lens projection display device with equal optical path illumination in the first preferred embodiment of the present invention, top view and side view respectively, and the three-lens projection display device with equal optical path illumination in this preferred embodiment 2. There is a projection lamp 21 located on the left side to provide a light source. The light projected by the projection lamp 21 first passes through a filter 22 to filter out ultraviolet rays and infrared rays, allowing only white light to pass through, and continues through a pair of intervals The set integrating mirror 23 homogenizes the white light, and then converts it through a polarized light converter 24 (P / S converter), so that the white light passes through a first beam splitter 251, a second beam splitter 252 and a predetermined configuration relationship. The first to fourth reflectors 261 to 264 separate the white lig...

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Abstract

The aplanatic lighted three-lens projecting display has two spectroscopes and at least one reflector to separate the incident white light into three color light beams and after the three color light beams are made to pass through separate aplanatic paths, they are projected to three light valves with output lens for image composition separately for regulation. Without using extending lens, the present invention has less variety of assemblies, and thus has relatively easy design and short development period.

Description

【Technical field】 [0001] The invention relates to a three-lens projection display device, in particular to a three-lens projection display device with three-color illumination lights designed with equal optical paths. 【Background technique】 [0002] Common liquid crystal projection display devices include single-lens and three-lens types. The single-lens type has the characteristics of being light, thin, and easy to carry, but it cannot project a large area in a short distance due to the back focal length. The lens and beam splitter and other related components used must have high quality and precision requirements, resulting in an increase in cost. Although the three-lens type takes up more space, it can project a large area within a short distance and have better image quality. [0003] Regardless of the single-lens or three-lens liquid crystal projection display device, in the design, the white light introduced by a projection lamp must be separated into the first, secon...

Claims

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Application Information

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IPC IPC(8): G02B27/18G02B27/28H04N9/31
Inventor 刁国栋庄福明詹胜雄
Owner 普基亚光电股份有限公司
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