Wavelength conversion device and its preparation method, light source device, projection equipment

The technology of a wavelength conversion device and a light source device is applied in the field of projection display, which can solve the problems of different proportions and yellow apertures, and achieve the effects of convenient molding, reducing optical path difference, and improving light and color unevenness.

Active Publication Date: 2021-10-26
APPOTRONICS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In projection equipment, the light source generally uses a blue laser chip or a blue LED chip as an excitation light source to excite the wavelength conversion device to obtain the desired light. For example, a part of the blue light can be converted into yellow light through the wavelength conversion device, and mixed with the remaining blue light to obtain white light. When the blue light passes through the existing wavelength conversion device, the optical path of the blue excitation light passing through the edge region of the wavelength conversion material is longer than the optical path of the blue excitation light passing through the central region of the wavelength conversion material, and the blue light passing through the edge of the wavelength conversion material is relatively short of the wavelength For the blue light in the central area of ​​the conversion material, the ratio of being absorbed and converted is more, so the proportion of blue light in the central area and edge area of ​​the exit spot is different, resulting in an obvious yellow halo phenomenon at the edge of the exit spot, so it is necessary to carry out the wavelength conversion device. Improve

Method used

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  • Wavelength conversion device and its preparation method, light source device, projection equipment
  • Wavelength conversion device and its preparation method, light source device, projection equipment
  • Wavelength conversion device and its preparation method, light source device, projection equipment

Examples

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no. 1 example

[0046] see Figure 1-3 , Figure 1-3 They are schematic structural diagrams of wavelength conversion devices 10 with different structures according to the first embodiment of the present invention. The wavelength conversion device 10 includes a meniscus lens unit 11 and a wavelength conversion unit 12 , and the meniscus lens unit 11 can serve as a support for the wavelength conversion unit 12 , functioning as a mold and a support.

[0047] The meniscus lens unit 11 includes a convex surface 111 and a concave surface 112 on the opposite side of the convex surface 111, the curvature radii of the convex surface 111 and the concave surface 112 may be the same or different, for example, the convex surface 111 And the concave surface 112 can be a spherical surface with the same or different radii, the concave surface 112 is formed with a groove 113, and one side of the wavelength conversion unit 12 is bonded to the groove 113, so that the wavelength conversion There is no air gap ...

no. 2 example

[0056] see Figure 5-7 , Figure 5-7 They are schematic structural diagrams of wavelength conversion devices 20 with different structures according to the second embodiment of the present invention. The main difference between this embodiment and the first embodiment is that this embodiment also includes a reflective layer 13, and the wavelength conversion device 20 provided in this embodiment is a reflective structure. It should be understood that each specific embodiment in the first embodiment The implementation manners can be correspondingly applied to this embodiment.

[0057] Such as Figure 5-7 As shown, a reflective layer 13 is provided on the second surface 122 of the wavelength conversion unit 12. The reflective layer 13 can cover the surface of the concave-convex lens unit 11 on the same side as the second surface 122. The reflective layer 13 can use Silicone or glass encapsulated Al 2 o 3 、TiO 2 Other white granular material. The laser light source is incide...

no. 3 example

[0061] Such as Figure 9 as shown, Figure 9 A flowchart of a method for preparing a wavelength conversion device provided by an embodiment of the present invention. The preparation of the wavelength conversion device provided by this embodiment may include the following steps:

[0062] S11: providing a meniscus lens unit.

[0063] Wherein, the meniscus lens unit 11 is used as a support body, the meniscus lens unit 11 may include a convex surface 111 and a concave surface 112 on the opposite side of the convex surface 111, the curvature of the convex surface 111 and the concave surface 112 The radii can be the same or different. The concave surface 112 is formed with a groove 113, and the groove 113 serves as a mold cavity.

[0064] The concave-convex lens unit 11 can be made of high thermal conductivity material, the thermal conductivity is preferably greater than 5W / m·K, more preferably greater than or equal to 10W / m·K, which can improve the thermal conductivity of the pre...

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Abstract

The present invention provides a wavelength conversion device, comprising a concave-convex lens unit and a wavelength conversion unit, the wavelength conversion unit is accommodated in a groove of the concave-convex lens unit, and one surface of the wavelength conversion unit is bonded to the groove , the thickness of the wavelength conversion unit decreases from the central region to the peripheral edge. The invention also provides a light source device, projection equipment and a preparation method of the wavelength conversion device. The invention can effectively improve the phenomenon of uneven light color of the exit light spot.

Description

technical field [0001] The invention relates to the technical field of projection display, in particular to a wavelength conversion device, a preparation method thereof, a light source device, and projection equipment. Background technique [0002] In projection equipment, the light source generally uses a blue laser chip or a blue LED chip as an excitation light source to excite the wavelength conversion device to obtain the desired light. For example, a part of the blue light can be converted into yellow light through the wavelength conversion device, and mixed with the remaining blue light to obtain white light. When the blue light passes through the existing wavelength conversion device, the optical path of the blue excitation light passing through the edge region of the wavelength conversion material is longer than the optical path of the blue excitation light passing through the central region of the wavelength conversion material, and the blue light passing through the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20
CPCG03B21/204G03B21/208F21V9/40G03B21/20
Inventor 徐梦梦余新胡飞李屹
Owner APPOTRONICS CORP LTD
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