Ultraviolet light oven for glass substrate

Patent metadata

Field	Value
Publication number	US-9281092-B2
Application number	US-201314235362-A
Country	US
Kind code	B2
Filing date	Dec 24, 2013
Priority date	Dec 20, 2013
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

The present invention provides an ultraviolet light oven for aligning liquid crystal molecules, comprising a plurality of ultraviolet light sources, each of the reflectors including a reflecting surface facing to the ultraviolet light source, wherein the reflector includes a first optical portion in the form of recess defined on the refracting surface. The present invention further provides an ultraviolet light oven for aligning liquid crystal molecules, and by providing a first optical portion on a reflecting surface of the reflector, and a second optical portion on the side surface of the reflector to as to properly reflect the light beam with is not directly projected toward the substrate and therefore increase the utilization of the ultraviolet light, the exposure and homogeneousness of the ultraviolet light. As a result, the exposing period is shortened, the working efficiency is increased.

First claim

What is claimed is:

1. An ultraviolet light oven for aligning liquid crystal molecules, comprising a plurality of ultraviolet light sources and a reflector, the reflector including a reflecting surface facing the ultraviolet light sources and two side surfaces at opposite ends of the reflecting surface and facing away from each other,
wherein the reflector includes a first optical portion in the form of recesses defined on the reflecting surface and a second optical portion comprising recesses having a circular cross section and formed in and uniformly distributed on each of the side surfaces of the reflector so that the recesses of the two side surfaces face away from each other and are located outside of the ultraviolet light sources irradiation area.

2. The ultraviolet light oven as recited in claim 1 , wherein the first optical portion is configured with a plurality of first grooves extending in a lengthwise or transversal direction of the reflector, wherein the first grooves are arranged in parallel to each other in the transversal or lengthwise direction.

3. The ultraviolet light oven as recited in claim 2 , wherein the ultraviolet light sources are arranged in parallel to each other, and each of the ultraviolet light sources is arranged with respect to and corresponding to one of the first grooves.

4. The ultraviolet light oven as recited in claim 3 , wherein each of the first grooves is defined with a curvature such that light projected from the corresponding ultraviolet light source is reflected by the first groove and then converges to a substrate corresponding to a middle portion between two adjacent ultraviolet light sources.

5. The ultraviolet light oven as recited in claim 2 , wherein each of the first grooves has a circular cross section.

6. The ultraviolet light oven as recited in claim 1 , wherein the first optical portion is configured with a plurality of second grooves arranged in a manner of honeycomb.

7. The ultraviolet light oven as recited in claim 6 , wherein the second grooves are arranged on the reflecting surface of the reflector.

8. The ultraviolet light oven as recited in claim 6 , wherein each of the second grooves is defined with a curvature such that light projected from a corresponding one of the ultraviolet light sources is reflected by the second groove and then converges to a substrate corresponding to a middle portion between two adjacent ultraviolet light sources.

9. The ultraviolet light oven as recited in claim 6 , wherein each of the second grooves has a circular cross section.

10. An ultraviolet light oven for aligning liquid crystal molecules, comprising a plurality of ultraviolet light sources and a reflector, the reflector including a reflecting surface facing the ultraviolet sources,
wherein the reflector includes a first optical portion in the form of recesses defined on the reflecting surface and a second optical portion comprising recesses having a circular cross section and formed in and uniformly distributed on each of the side surfaces of the reflector so that the recesses of the two side surfaces face away from each other and are located outside of the ultraviolet light sources irradiation area; and
wherein the first optical portion is configured with a plurality of first grooves extending in a lengthwise or transversal direction of the reflector, wherein the first grooves are arranged in parallel to each other in the transversal or lengthwise direction.

11. The ultraviolet light oven as recited in claim 10 , wherein the ultraviolet light sources are arranged in parallel to each other, and each of the ultraviolet light sources is arranged with respect to and corresponding to one of the first grooves.

12. The ultraviolet light oven as recited in claim 11 , wherein each of the first grooves is defined with a curvature such that light projected from the corresponding ultraviolet light source is reflected by the first groove and then converges to a substrate corresponding to a middle portion between two adjacent ultraviolet light sources.

13. The ultraviolet light oven as recited in claim 10 , wherein each of the first grooves has a circular cross section.

14. An ultraviolet light oven for aligning liquid crystal molecules, comprising a plurality of ultraviolet light sources and a reflector, the reflector including a reflecting surface facing the ultraviolet light sources,
wherein the reflector includes a first optical portion in the form of recesses defined in the reflecting surface, such that the first optical portion comprises a plurality of second grooves formed in and uniformly distributed on the reflecting surface, each of the second grooves comprising a circular dimple formed in the reflecting surface and having a circular arc cross section, the dimples being distributed across the reflecting surface; and
wherein the reflector includes a second optical portion comprising recesses having a circular cross section and formed in and uniformly distributed on each of the side surfaces of the reflector so that the recesses of the two side surfaces face away from each other are located outside of the ultraviolet light sources irradiation area.

15. The ultraviolet light oven as recited in claim 14 , wherein the reflector further includes a second optical portion defined onto at least two side surfaces of the reflector.

16. The ultraviolet light oven as recited in claim 14 , wherein the circular arc cross section of the dimple of each of the second grooves is defined with a curvature such that light projected from a corresponding one of the ultraviolet light sources is reflected by the second groove and then converges to a substrate corresponding to a middle portion between two adjacent ultraviolet light sources.

Assignees

• Shenzhen China Star Optoelect
• Shenzhen China Star Optoelect

Inventors

• Liu Xiaocheng

Classifications

• G21K5/02

  having no beam-forming means · CPC title

• G02F1/133788

  by light irradiation, e.g. linearly polarised light photo-polymerisation · CPC title

• G21K1/067 Primary

  using surface reflection, e.g. grazing incidence mirrors, gratings (multilayer mirrors G21K1/062) · CPC title

• G02F1/1303 Primary

  Apparatus specially adapted to the manufacture of LCDs · CPC title

• G02F1/133711

  by organic films, e.g. polymeric films · CPC title