Backlight having all-in-one type light guide plate and method of manufacturing all-in-one type light guide plate

• US 7,985,533 B2
• Filed: 03/30/2010
• Issued: 07/26/2011
• Est. Priority Date: 03/28/2006
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Hong-seok, Yoon, Eung-yeoul
• Primary Examiner(s): McPherson; John A.
• Application Number:
  US12/749,962
• Publication Number:
  US 20100181287A1
• Time in Patent Office: 483 Days
• Field of Search: None
• US Class Current: 430/321
• CPC Class Codes: G02B 6/0038 Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
• CPC Class Codes: G02B 6/0043 provided on the surface of the light guide
• CPC Class Codes: G02B 6/0053 Prismatic sheet or layer; Brightness enhancement element, sheet or layer
• CPC Class Codes: G02B 6/0065 Manufacturing aspects; Material aspects
• CPC Class Codes: Y10S 385/901 Illuminating or display apparatus

Abstract

Provided is an all-in-one type light guide plate including a plurality of prism-shaped structures that are integrally formed on the all-in-one light guide plate and which totally internally reflect light incident from a light source and emit the totally internally reflected light.

Claims

1. A method of manufacturing a light guiding device, the method comprising:

forming a sacrificial layer on a substrate;

forming a plurality of prism-shaped portions, corresponding in shape to a plurality of prism-shaped structures of the light guiding device, on the sacrificial layer;

forming the light guiding device by coating a material on the sacrificial layer and the prism-shaped portions; and

separating the light guiding device from the sacrificial layer,

wherein a width of a light exit surface of the prism-shaped portions is wider than a width of a light entry region of the prism-shaped portions.

2. The method of claim 1, wherein the forming the plurality of prism-shaped portions comprises regulating a thickness of the sacrificial layer to adjust the shape of each of the prism-shaped portions.

3. The method of claim 1, wherein the forming the prism-shaped portions comprises:

positioning a mask having a plurality of through-holes patterned in a predetermined pattern on the sacrificial layer, and

irradiating UV light through the through-holes so that the prism-shaped portions formed on the sacrificial layer have an at least partially oval-shaped cross section.

4. The method of claim 1, wherein forming the plurality of prism-shaped portions comprises:

positioning a mask having a plurality of through-holes patterned in a predetermined pattern on the sacrificial layer, and

irradiating UV light inclined and symmetrically through the through-holes so that the prism-shaped portions formed on the sacrificial layer have a trapezoidal shaped cross section.

5. The method of claim 1, further comprising forming a plurality of diffusers on the substrate prior to forming the sacrificial layer on the substrate.

6. The method of claim 1, wherein the light guiding device is made of an elastic material.

7. The method of claim 1, wherein the light guiding device is made of a hardening material.

8. The method of claim 1, wherein the sacrificial layer is made of an elastic material.

9. A method of manufacturing a light guiding device, the method comprising:

forming a sacrificial layer on a substrate;

forming a plurality of prism-shaped portions, corresponding in shape to a plurality of prism-shaped structures of the light guiding device, on the sacrificial layer;

forming the light guiding device by coating a material on the sacrificial layer and the prism-shaped portions; and

separating the light guiding device from the sacrificial layer,

wherein the forming the plurality of prism-shaped portions comprises;

etching the sacrificial layer; and

partially filling an etched portion of the sacrificial layer with a filler to adjust a thickness of the prism-shaped portions.