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Novel projector light source structure with small size

A projector and small-volume technology, applied in the field of projection light sources, can solve the problems of large occupied volume, many lens components, complex optical path, etc., and achieve the effect of small occupied volume, few lens components and high output luminous flux

Inactive Publication Date: 2019-02-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing projector light sources usually use the light emitted by the blue laser source to irradiate the fluorescent wheel to produce fluorescence, and the fluorescent wheel is provided with a transmission area for transmitting the light emitted by the blue laser source. The light transmitted from the transmission area needs to pass through many times The reflection and refraction can combine with the fluorescence, the optical path is complicated, the lens parts are many, the volume is large, and the cost is high.

Method used

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  • Novel projector light source structure with small size
  • Novel projector light source structure with small size
  • Novel projector light source structure with small size

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Embodiment 1

[0044] This embodiment provides a new light source structure of a small volume projector, which has a simple optical path, uses few parts, occupies a small volume, and has low manufacturing cost.

[0045] refer to Figure 2 to Figure 4 , specifically, the light source structure of the new small-volume projector includes a light source 1, a fluorescent wheel 6, a light splitting assembly 3 and a reflection assembly 4; the light splitting assembly 3 is arranged obliquely relative to the light source 1; Comprising a transmission area 31 and a reflection area 32; the laser light includes a transmission area laser 11 and a reflection area laser 12, the transmission area laser 11 passes through the transmission area 31, and the reflection area laser 12 is reflected to the fluorescent wheel 6 through the reflection area 32; the fluorescent wheel 6 is close to One side of the light-splitting component 3 is provided with a phosphor coating layer; the laser light 12 in the reflection ar...

Embodiment 2

[0058] refer to Figure 5 and Figure 6 , this embodiment is similar to Embodiment 1, the difference is that: the light splitting assembly 3 is arranged at intervals with dichroic mirrors 43, the reflection area 32 is a dichroic mirror 43, the coating is required to reflect blue laser light and transmit fluorescence, and the transmission area 31 is the gap where the dichroic mirror 43 is arranged. During specific implementation, the dichroic mirror 43 can be fixed through the slots of the upper cover and the lower cover of the structure.

[0059] In addition, in this embodiment, the light splitting component 3 can also adopt such as Figure 5 For the spacer coated glass, the reflective area 32 is required to be coated to reflect the blue laser light while transmitting the excited fluorescence, and the transmission area 31 is coated with an anti-reflection film or not coated to transmit the blue laser light and the fluorescent light. The spacer coating can be vertical strips...

Embodiment 3

[0061] refer to Figure 7 The difference between this embodiment and Embodiment 2 is that the position of the reflective component 4 in the above Embodiment 2 is changed to reflect the transmitted laser light 11 in the transmission region so as to be consistent with the transmission direction of the excited fluorescence. The blue laser light generated by the light source 1 is reflected by the reflection area 32 of the spectroscopic assembly 3 to the fluorescent wheel 6 to excite the fluorescence, and at the same time transmits the wavelength bands other than the blue laser light. The transmission area 31 is opposite to the transmission area laser 11 and the The excited fluorescence is transmitted, and the fluorescence is combined with the laser light 11 in the transmission area and the light transmitted through the spectroscopic component 3 to be transmitted in the same direction. After passing through the focusing and shaping lens group, it enters the light rod 9 through the c...

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Abstract

The invention relates to the technical field of projection light sources, in particular to a novel projector light source structure with a small size. Transmissive regions are disposed on a spectroscopic component to directly transmit a part of the light emitted by a light source, and reflective regions are disposed to reflect a part of the laser light emitted by the light source, and the light isirradiated onto a fluorescent wheel to excite fluorescence. The fluorescence and the laser light are combined into one optical path, the optical path is reduced, the number of optical path lenses isreduced, the size is reduced, and the cost is reduced. In addition, two kinds of blue lasers with different dominant wavelengths can be used to improve the fluorescence excitation efficiency, therebyimproving the light conversion efficiency of the entire light source, outputting high luminous flux, meeting the demand of highlighting, and reducing the stimulation to the human eye. The novel projector light source structure is compatible with various light source schemes such as a monochromatic blue laser, a blue laser and a red laser, and a red, green and blue laser, which is advantageous forsharing molds in mass production and reducing expensive mold costs.

Description

technical field [0001] The present invention relates to the technical field of projection light sources, and more particularly relates to a novel structure of a small-volume projector light source. Background technique [0002] Nowadays, more and more home appliance manufacturers are beginning to move closer to the laser TV product line. With the deepening of a series of brands, laser projection has gradually gained the attention of consumer groups. The light sources of projection systems are mainly divided into three categories, namely Bulb light source, LED light source and laser light source. Laser light source is the projection light source that has received the most attention in recent years. The laser light source has the characteristics of bright colors and high spectral brightness. It can synthesize more than 90% of the color gamut coverage of natural colors seen by the human eye to achieve perfect color reproduction. At the same time, the laser light source has ult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20
CPCG03B21/204G03B21/2066G03B21/208
Inventor 黄江何磊向思衡侯思辉
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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