Optical component, backlight module and display apparatus using same

• US 8,469,574 B2
• Filed: 07/15/2010
• Issued: 06/25/2013
• Est. Priority Date: 07/15/2010
• Status: Expired due to Fees

• Current Assignee: CHI MEI Corporation
• Original Assignee: CHI LIN Technology Company Limited (CHI MEI Optoelectronics Corporation)
• Inventors: Chiang, Yi-Hsing, Chang, Te-Hung
• Primary Examiner(s): Husar, Stephen F
• Assistant Examiner(s): DUNWIDDIE, MEGHAN K
• Application Number:
  US12/837,363
• Publication Number:
  US 20120014129A1
• Time in Patent Office: 1,076 Days
• Field of Search: 362/253, 362/317, 362/326, 362/606, 362/607, 362/608, 349/58, 359/237
• US Class Current: 362/607
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer

Abstract

An optical component is provided in the present disclosure. The optical component, which can be used in a backlight module or a display apparatus, comprises a substrate and optical medium poles embedded in the substrate. A refractive index difference between the substrate and the optical medium poles is greater than 0.4. A backlight module and a display apparatus are also provided.

Claims

1. An optical component adapted for using in a backlight module providing light sources to a display apparatus, the optical component comprising:

a first optical layer comprising;

a substrate; and

optical medium poles embedded in the substrate;

wherein a refractive index difference between the substrate and the optical medium poles is greater than 0.4;

the optical medium poles are air poles forming a plurality of through holes in the substrate; and

a diameter D of the through hole is approximately in a range from 10 μ

m to 1 mm.

2. The optical component of claim 1, wherein an aspect ratio H/D of the through hole is approximately in a range from 0.4 to 1.4, and H represents a depth of the through hole.

3. The optical component of claim 1, wherein a duty cycle D/P of the through hole is approximately in a range from 0.2 to 0.8, and P represents a distance between centers of two adjacent through holes.

4. The optical component of claim 1, wherein each of the through holes comprises an upper diameter D1 corresponding to the upper surface, and a lower diameter D2 corresponding to the lower surface, and D1/D2 is approximately in a range from 0.9 to 1.1.

5. The optical component of claim 1, further comprising a second optical layer and a third optical layer sandwiched between the first optical layer and the second optical layer, and the optical medium poles are at least disposed in the first optical layer and the second optical layer.

6. The optical component of claim 5, wherein micro-structures are formed in the third optical layer.

7. A backlight module, comprising:

a light guide plate comprising at least one light incident surface and a light emitting surface;

at least one light source adjacent to the at least one light incident surface of the light guide plate; and

an optical component adjacent to a light emitting surface of the light guide plate, the optical component comprising a first optical layer comprising a substrate and optical medium poles embedded in the substrate, and a refractive index difference between the substrate and the optical medium poles being greater than 0.4;

wherein the optical medium poles are air poles forming a plurality of through holes in the substrate; and

a diameter D of the through hole is approximately in a range from 10 μ

m to 1 mm.

8. The backlight module of claim 7, wherein an aspect ratio H/D of the through hole is approximately in a range from 0.4 to 1.4, and H represents a depth of the through hole.

9. The backlight module of claim 7, wherein a duty cycle D/P of the through hole is approximately in a range from 0.2 to 0.8, and P represents a distance between centers of two adjacent through holes.

10. The backlight module of claim 7, wherein each of the through holes comprises an upper diameter D1 corresponding to the upper surface, and a lower diameter D2 corresponding to the lower surface, and D1/D2 is approximately in a range from 0.9 to 1.1.

11. The backlight module of claim 7, further comprising a second optical layer and a third optical layer sandwiched between the first optical layer and the second optical layer.

12. The backlight module of claim 11, wherein micro-structures are formed in the third optical layer.

13. The backlight module of claim 7, further comprising one or more films of the following:

a diffuser, a brightness enhance film or a prism sheet disposed on the optical component.

14. A display apparatus, comprising:

a display panel configured to display images; and

a backlight module configured to provide illumination for the display panel, the backlight module comprising;

a light guide plate; and

an optical component disposed between the display panel and the light guide plate, the optical component comprising a first optical layer comprising a substrate and optical medium poles embedded in the substrate, and a refractive index difference between the substrate and the optical medium poles being greater than 0.4;

wherein the optical medium poles are air poles forming a plurality of through holes in the substrate, and a diameter D of the through hole is approximately in a range from 10 μ

m to 1 mm.

15. The display apparatus of claim 14, wherein an aspect ratio H/D of the through hole is approximately in a range from 0.4 to 1.4, and H represents a depth of the through hole.

16. The display apparatus of claim 14, further comprising one or more films of the following:

a diffuser, a brightness enhance film or a prism sheet disposed on the optical component.