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Optical diffuser, light emitting module, mobile terminal and manufacturing method of optical diffuser

A technology of optical diffusion and modules, applied in the field of imaging, can solve the problems of difficult manufacturing process, affecting the production yield of modules 1′, misjudgment of modules, etc.

Inactive Publication Date: 2021-05-18
NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the intensity of reflected light on the surface of the photodiode 30' is greatly affected by the distance between PD-VCSEL / PD-Diffuser, and some modules have PD current values ​​beyond the control range due to large process deviations, which makes the module misjudgment, which leads to The manufacturing process is more difficult, which affects the production yield of module 1′

Method used

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  • Optical diffuser, light emitting module, mobile terminal and manufacturing method of optical diffuser
  • Optical diffuser, light emitting module, mobile terminal and manufacturing method of optical diffuser
  • Optical diffuser, light emitting module, mobile terminal and manufacturing method of optical diffuser

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Embodiment Construction

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0043] In describing the present invention, it is to be understood that the terms "centre", "length", "width", "thickness", "top", "bottom", "inner", "outer", "circumferential" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientat...

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Abstract

The invention discloses an optical diffuser, a light emitting module, a mobile terminal and a manufacturing method of the optical diffuser. The optical diffuser comprises: a diffusion sheet; and an ITO layer which is arranged in the diffusion sheet, wherein the ITO layer is arranged in the diffusion sheet. According to the optical diffuser provided by the embodiment of the invention, whether the optical diffuser is broken or not can be accurately judged, the cost is low, the module volume is reduced, the manufacturing difficulty is reduced, and the production yield of the module is improved.

Description

technical field [0001] The invention relates to the field of imaging technology, in particular to an optical diffuser, a light emitting module with the optical diffuser, a mobile terminal with the light emitting module and a manufacturing method of the optical diffuser. Background technique [0002] TOF (time of flight) module 1' in the related art, such as figure 1 As shown, if the optical diffuser (Diffuser) 10' in the module breaks, it will cause the VCSEL (Vertical Cavity Surface Emitting Laser) light source 20' to hit the human eye directly, causing damage to the human eye. For this reason, a photodiode (PD) 30' is usually added in the module to receive the reflected light from the optical diffuser 10', and the photocurrent generated by it is monitored to determine whether the optical diffuser 10' is broken, but this solution There are the following problems: [0003] Due to the addition of the photodiode 30', the cost of the TOF module 1' increases; [0004] The ove...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02H01S5/02315H04B10/50H04M1/02
CPCG02B5/02H04B10/501H04M1/026
Inventor 丁细超沈培逸李宗政
Owner NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH