Diffuser with light condensing function

• US 7,887,221 B2
• Filed: 03/31/2008
• Issued: 02/15/2011
• Est. Priority Date: 02/14/2008
• Status: Active Grant

• Current Assignee: Optivision Technology INC.
• Original Assignee: Optivision Technology INC.
• Inventors: Lor, Whey-Bin, Yuan, Kuang-Lin, Liu, Wen-Hao
• Primary Examiner(s): CONSILVIO, MARK J
• Application Number:
  US12/078,453
• Publication Number:
  US 20100232022A1
• Time in Patent Office: 1,051 Days
• Field of Search: 362/620, 362/339, 362/340, 362/337
• US Class Current: 362/339
• CPC Class Codes: G02B 5/0221 the surface having an irregular structure G02B5/0226 takes precedence
• CPC Class Codes: G02B 5/0231 the surface having microprismatic or micropyramidal shape macroscopic prism arrays G02B5/045
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: G02B 5/045 Prism arrays

Abstract

One face of a substrate of a diffuser with a light condensing function is disposed with a plurality of prism rods; at least one inclined face of parts of prism rods is disposed with a rough diffusion face; the diffusion face may be positioned on any position of the inclined face of the prism rod; the diffusion face is disposed with a plurality of irregularly arranged raised and indented stripes perpendicular, not perpendicular or parallel to a crest line of the prism rod; chromatid dispersion can be reduced and stripes of the prism rods can be atomized effectively by utilizing the diffusion face to eliminate the occurrence of moiré fringes and elevate the yield factor.

Claims

1. A diffuser with a light condensing function comprising:

a substrate; and

a plurality of longitudinally arranged long strip-typed prism rods being disposed on said substrate, each of said prism rods being provided with a crest line, a first inclined face and a second inclined face, said crest line being positioned at the highest position of said prism rod, and said first inclined face and said second inclined face respectively extending from two sides of said crest line to said substrate;

wherein at least one of said first inclined face and said second inclined face is disposed with a diffusion face which has a randomly or regularly varied width respectively and is provided with a plurality of irregularly arranged raised and indented stripes.

2. The diffuser with a light condensing function according to claim 1, wherein said inclined face has a width, and said randomly or regularly varied width is provided with a value between 2% and 90% of the width of said inclined face.

3. The diffuser with a light condensing function according to claim 1, wherein said raised and indented stripes are perpendicular to said crest line.

4. The diffuser with a light condensing function according to claim 1, wherein said raised and indented stripes are parallel to said crest line.

5. The diffuser with a light condensing function according to claim 2, wherein said raised and indented stripes are perpendicular to said crest line.

6. The diffuser with a light condensing function according to claim 2, wherein said raised and indented stripes are parallel to said crest line.

7. The diffuser with a light condensing function according to claim 5, wherein said diffusion face is close to said substrate.

8. The diffuser with a light condensing function according to claim 5, wherein said diffusion face is close to said crest line.

9. The diffuser with a light condensing function according to claim 6, wherein said diffusion face is close to said substrate.

10. The diffuser with a light condensing function according to claim 6, wherein said diffusion face is close to said crest line.