Projector

Abstract

The invention provides a projector comprising a lighting system, a biaxial overturning digital micromirror device, a first prism, a second prism, and a lens. The lighting system emits incident light. The digital micromirror device receives and converts the incident light into imaging light. The biaxial overturning digital micromirror device has two first opposite long sides and two first opposite short sides. The first prism is arranged between the lighting system and the biaxial overturning digital micromirror device and includes a first surface and a second surface. The second prism is arranged between the first prism and the biaxial overturning digital micromirror device and includes a third surface, a fourth surface and a fifth surface. The incident light is transmitted through the third surface and the fourth surface to the biaxial overturning digital micromirror device. The imaging light passes through the fourth surface, is reflected by the third surface and passes through the fifth surface to the lens. The fourth surface has two second opposite long sides and two second opposite short sides, the second long sides are parallel to the first long sides and the second short sides are parallel to the first short sides. The lens receives and projects the imaging light.

Description

technical field [0001] The present invention relates to a projector, in particular to a projector with a two-axis reversible digital micromirror device. Background technique [0002] The projector uses the imaging principle and uses a digital micro-mirror device (Digital Micro-mirror Device) to project tiny images onto a huge screen and provide enough brightness to share image information with everyone. [0003] figure 1 is a component architecture diagram of a traditional projector 1, such as figure 1 As shown, the conventional projector 1 includes a digital micromirror device 10 , a reflection (Total Internal Reflection, TIR) prism group 11 , a mirror 12 , a lens module 13 and a light pipe (Light Pipe) 14 . To define the view direction, figure 1 The right side of shows the three axes of the Cartesian coordinate system. by figure 1 Specifically, the X-axis is the direction to the right from the origin, the Y-axis is the downward direction from the origin, and the Z-axi...

AI Technical Summary

Problems solved by technology

However, the digital micromirror device 10 rotating around a single axis in the traditional projector 1 can only accept incident light as an oblique incident light due to the limitation of physical characteristics.

Therefore, the total reflection prism group 11 is inclined at an angle (for example, 45 degrees) relative to the digital micromirror device 10, which will cause the volume of the traditional projector 1 to be limited. In today's pursuit of miniaturized projectors, the traditional projector 1 is too large The volume will lead to insufficient convenience and gradually lose competitiveness

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