Light guide body and bicomponent linear light source device

A technology for light source devices and light guides, which is applied in the direction of point light sources, light sources, lighting devices, etc., can solve the problems of larger devices, inability to adapt to miniaturization, and shadow generation, so as to reduce the formation area, strengthen the formation, increase The effect of freedom of design

Active Publication Date: 2010-01-27
USHIO DENKI KK
View PDF3 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, since the light guides described in Patent Document 1 and Patent Document 2 irradiate light from one direction to the document reading surface, shadows are produced when there is a level difference caused by creases or adhesion on the paper surface as the object to be irradiated.
In addition, the light source device described in Patent

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
  • Light guide body and bicomponent linear light source device
  • Light guide body and bicomponent linear light source device
  • Light guide body and bicomponent linear light source device

Examples

Experimental program
Comparison scheme
Effect test

Example

[0049] use Figure 1 to Figure 5 The first embodiment of the present invention will be explained.

[0050] figure 1 It is a perspective view of the light guide 1 according to the invention of this embodiment.

[0051] In this figure, 1 is a light guide, 2 is a light incident surface formed on one end surface of the light guide 1 in the longitudinal direction, 3 is the other end surface of the light guide 1 in the longitudinal direction, and 4a, 4b are light Turning surfaces (reflecting surfaces), 5a, 5b are light exiting surfaces, and 6a, 6b are a pair of protrusions provided on the side surfaces between the light turning surfaces 4a, 4b and the light exiting surfaces 5a, 5b.

[0052] The light guide 1 is made of a rod-shaped transparent acrylic resin with a radius of 5-6 thin rod shape, length is 320mm, since the light guide 1 bends and the illumination position is shifted when only the ends of the light guide 1 are held, a pair of protrusions 6a, 6b. The light guide 1 is provid...

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 provides a light guide body and a bicomponent linear light source device which can easily irradiate light on the original read surface in two directions and can realize miniaturization of the device. A light guide body (1) is in a shape of a transparent rod, and forms light steering surfaces (4a, 4b) which extend along the length direction and light outgoing surfaces (5a, 5b) opposite to the light steering surfaces (4a, 4b); the light steering surfaces (4a, 4b) are formed by two surfaces which are formed by vertical surfaces which extend along the length direction relative to the light steering surfaces (4a, 4b) being configured in a cross manner, so that the convergent light in two directions is emitted from the light outgoing surfaces (5a, 5b).

Description

technical field [0001] The present invention relates to a light guide and a double-branched linear light source device, and more particularly to a light guide used as a light source for illuminating image reading devices used in facsimile machines, copiers, image scanners, barcode readers, etc. And double-branch linear light source device. Background technique [0002] In recent years, in image reading devices such as personal facsimile machines, as the power of light emitting diodes (hereinafter referred to as LEDs) has increased and the sensitivity of CCD-type sensors as light-receiving elements has increased, LEDs that are small and low in power consumption have gradually been used. Used as a light source for the reading light source unit. A conventional linear light source device having such LEDs as a light source is known to use a light guide to guide the light emitted from the light source into the light guide in a desired direction for the purpose of reducing the num...

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
IPC IPC(8): F21V8/00F21V13/00H04N1/04G02B27/54H01L33/00F21W131/403F21Y101/02F21Y115/10
Inventor 芜木清幸羽田博成龟井宏市
Owner USHIO DENKI KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap