Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Large-angle diffusing optical lens

An optical lens, large-angle technology, applied in optics, lenses, condensers, etc., can solve problems such as bright circles and uneven light distribution, and achieve the effect of avoiding shadow shadows of support columns, uniform light distribution, and reducing packaging tolerance requirements.

Active Publication Date: 2015-04-08
TPV DISPLAY TECH (XIAMEN) CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the above structure is adopted, the processing accuracy of the secondary lens is very high. When the accuracy deviation is greater than 0.01mm, a bright circle will be generated; and because the reflected light on the bottom surface is concentrated near the central axis, when the design of the central surface is slightly deviated or When the processing accuracy is slightly deviated, it is very easy to appear a bright circle near the central axis, making the light distribution uneven

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Large-angle diffusing optical lens
  • Large-angle diffusing optical lens
  • Large-angle diffusing optical lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Such as Figure 13 As shown, the curved bottom surface 1 of the optical lens in this embodiment is an optical lens with a light diffusion structure 5 . Part of the light a is refracted outward when passing through the light-incident surface 3 , and refracted outward again when passing through the light-emitting surface 2 , so as to achieve the purpose of light diffusion. Part of the light b is reflected when it reaches the light-emitting surface 2, and when it reaches the bottom surface 1 of the curved surface, due to the influence of the curved surface structure, the light is reflected in a direction away from the central axis of the lens, which can reduce the light intensity near the central axis of the lens and make the receiving surface of the light source near the central axis The light on 6 is evenly distributed.

[0078] When the gap between the light emitting surface of the light source 4 and the bottom surface 1 of the light lens is greater than 0, since the c...

Embodiment 2

[0081] Such as Figure 15 As shown, in this embodiment, a light diffusion structure 5 with concave points is provided on the bottom surface 1 . When the light passes through the bottom surface 1, the light diffuses through the light diffusion structure 5 of the concave point, which can solve the problem of bright rings generated when the gap between the light source 4 and the bottom surface 1 of the optical lens is greater than 0.

[0082] Figure 16 When the gap between the light source 4 and the bottom surface 1 of the optical lens is equal to 0.2 mm, the curved bottom surface 1 of the optical lens has no diffusion structure (such as Figure 8 The illuminance distribution diagram of light when the optical lens is shown), there are obvious bright circles in this illuminance distribution diagram.

[0083] In this example, Figure 17 When the gap between the light source 4 and the bottom surface 1 of the optical lens is equal to 0.2 mm, the light illuminance distribution dia...

Embodiment 3

[0086] Such as Figure 18 As shown, in this embodiment, a light diffusion structure 5 with bumps is provided on the bottom surface 1 . When the light passes through the bottom surface 1, the light diffuses through the bump structure, which can solve the problem of bright circles generated when the gap between the light source 4 and the bottom surface 1 of the optical lens is greater than 0.

[0087] Figure 19When the gap between the light source 4 and the bottom surface 1 of the optical lens is equal to 0.2 mm, the illuminance distribution diagram of light when the curved bottom surface 1 of the optical lens has no light diffusion structure 5 . It can be seen from the figure that when there is a packaging tolerance between the light source 4 and the optical lens, and the bottom surface 1 of the optical lens is not provided with the light diffusion structure 5 , at this time, there are obvious bright circles on the light source receiving surface 6 .

[0088] Figure 20 When...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an optical lens utilized for disposing above a light source. The optical lens has rotational symmetry relative to the central axis thereof. The central axis of the optical lens aligns with the center of the light source. The optical lens includes a bottom surface, an emergence surface with arc shape, an incidence surface with arc and concave shape, a curved surface with annular and concave shape and a light diffusing structure. The emergence surface connects a side of the bottom surface. The incidence surface connects another side of the bottom surface and lies in the middle of the bottom surface. The curved surface lies on the bottom surface and connects the incidence surface. The light diffusing structure is disposed on the curved surface. The invention improves the distribution of light projected on a light receiving surface and prevents a bright circle formed on the light receiving surface as a result of a gap that is formed by assembly tolerance of the optical lens and the light source.

Description

technical field [0001] The present invention relates to a lens structure, in particular to a light-emitting device that emits light at a large angle, especially a large-angle diffused optical lens in a backlight module using a dot-matrix backlight source. Background technique [0002] At present, most liquid crystal modules used in flat panel displays adopt TFT-LCD (Thin Film Field Effect Transistor LCD) technology. TFT-LCD is a non-active light-emitting display. Usually, a white backlight module (Backlight Module) provides uniform system brightness, and then obtains rich color display through a color filter (Color Filter). [0003] Such as figure 1 As shown, the existing white light direct type backlight module includes a light source and an optical film set 6 . Light-emitting diode 4 (LED) has become one of the light sources used in LCD backlight modules due to its small size and low energy consumption; LED4 is a Lambertian light source, and the light spot directly above...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F21V5/04F21V17/00F21Y101/02
CPCG02B19/0019F21V5/045G02B19/0066H01L33/58G02B3/02
Inventor 李丽梅郑俊义林博瑛
Owner TPV DISPLAY TECH (XIAMEN) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com