a projector

Abstract

Disclosed is a projector, comprising: a light combining module (100) comprising a first prism unit and a second lens unit; a light supplying module comprising a first light source group (300) and a second light source group (200); and an image display module (400) and a lens (401). There is a gap between the first prism unit and the second lens unit of the light combining module (100), and the surfaces thereof which are close to each other are all planes. The image display module (400) and the second light source group (200) are arranged opposite each other and respectively located on two sides of the light combining module (100). The lens (401) and the first light source group (300) are arranged opposite each other and are located on the other two sides of the light combining module (100) respectively. The light combining module (100) is used for transmitting and reflecting the light from the first light source group (300) and the second light source group (200), such that the light from the first light source group (300) and the second light source group (200) is combined and then projected to the image display module (400) for modulation and display. The image displayed by the image display module (400) is reflected by the light combining module (100) and then emitted to the lens (401). By means of the integration of light paths by the light combining module (100), the projector has a simple structure and small size.

Description

technical field [0001] The invention relates to the technical field of projection display, in particular to a projector. Background technique [0002] Most of the current miniature projection light machines adopt the DLP technology of Texas Instruments, and its main image and light control devices are generally called DMD light modulators. It is a micro-mirror array with extremely high reflectivity. It needs to cooperate with the illumination optical system and the projection optical system to convert the commonly used RGB three primary colors into a projection image that is easy to see for our eyes. One of the commonly used methods of combining the illumination optical system and the projection optical system is to use a total internal reflection element having a lens surface. [0003] At present, projectors generally use one light source as the projection light source. Although the structure is simplified, it also happens that only one light source is used in high-brightn...

AI Technical Summary

Problems solved by technology

[0003] At present, projectors generally use one light source as the projection light source. Although the structure is simplified, it also occurs that only one light source is used in a high-brightness environment, and the brightness cannot meet user needs, such as outdoor

The existing method of increasing brightness is to use fluorescent powder or fluorescent color wheel, which not only makes the structure more complicated, but also increases the volume of the projector, and also causes a large heat dissipation burden on the projector, which affects the service life

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