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Optical assembly for a display having tapered waveguide and process for making the same

A technology for optical components and displays, applied in the field of manufacturing such components and optical components with tapered waveguides, can solve the problems of unresolved, unstable black film, and inability to become, achieve simple manufacturing, improve light efficiency, The effect of process simplification

Inactive Publication Date: 2007-05-09
SEKONIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this disclosure does not suggest a suitable method of forming this structure, and the black film between the waveguides described above is not an effective solution to the problems in the prior art due to its instability without its supporting structure

Method used

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  • Optical assembly for a display having tapered waveguide and process for making the same
  • Optical assembly for a display having tapered waveguide and process for making the same
  • Optical assembly for a display having tapered waveguide and process for making the same

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Embodiment

[0110] As an example, Figure 7 shows the path of light travel inside a waveguide with a light input surface width of 40 mm, a gradient of 4 degrees on the sidewall of the waveguide, a refractive index nw of the waveguide of 1.6, and a refractive index of the surrounding medium of 1.3 , and the ray is incident at 0 to 10 degrees relative to the axis H. As shown in Figure 6, if the input angle is 10 degrees (light ray 126), then the incident light partially passes through the waveguide at its fourth reflection point 127, and the length of the waveguide 120 needs to be limited to 173 mm (corresponding to the fourth reflection point 127). point) to reduce light loss.

[0111] The construction of the optical assembly 100 of FIG. 8 is based on the principle that the optical loss caused by carbon black directly contacting the side 122 from the outside of the waveguide 120 (as described above) can be avoided. The first resin layer 154 is formed on the outer wall surface of the wavegu...

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Abstract

Disclosed is an optical device for a display having a tapered waveguide and a method of fabricating such devices. In order to reduce light absorption inside the waveguide, a light-absorbing material is coated on the front surface only of the optical device. Alternatively, a space adjacent to the waveguide is coated with a material having a refraction index different from the waveguide, preferably, lower than that of the waveguide and then filled with a light-absorbing material. In addition, a large- and uniform-sized light-absorbing material may be filled in the space. The optical device has an improved light efficiency, and thus exhibits an excellent luminance, as compared with the conventional ones, when using an identical light source. Furthermore, the fabrication method can produce such optical devices in a simplified manner, thus improving production efficiency.

Description

technical field [0001] The present invention relates to an optical component for a display and a method for manufacturing the component, more particularly to an optical component for a display with a tapered waveguide and a method for manufacturing the component. Background technique [0002] Generally speaking, optical components used in displays such as projection TVs, screens of rear projection projectors, thin film transistor liquid crystal displays, plasma TVs or cathode ray tube monitors have a fine lens structure or waveguide structure to widen their viewing angles. The invention relates to a method for manufacturing an optical component with a tapered waveguide structure for a display. [0003] The traditional optical components for displays will be briefly described below, please refer to the matching descriptions in FIG. 1 and FIG. 2 . [0004] FIG. 1 is an enlarged view of a screen of a conventional optical component for a display, and FIG. 2 is an enlarged cross...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335
CPCG02B5/021G02F1/133524
Inventor 黄治皇游录彬李泳三
Owner SEKONIX