Reflective display apparatus

• US 9,733,422 B2
• Filed: 07/22/2015
• Issued: 08/15/2017
• Est. Priority Date: 04/10/2015
• Status: Active Grant

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: E Ink Holdings Incorporated
• Inventors: Shei, Tsai-Wei, Chen, I-Jeng, Huang, Hsin-Tao, Pao, Yu-Nan, Tai, Sheng-Chieh
• Primary Examiner(s): Green, Tracie Y
• Application Number:
  US14/806,630
• Publication Number:
  US 20160299284A1
• Time in Patent Office: 755 Days
• CPC Class Codes: G02B 6/0065 Manufacturing aspects; Material aspects
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package

Abstract

A reflective display apparatus includes a reflective display panel, a light guide plate, an elastic ring, a light permeable liquid and a holding device. The elastic ring is sandwiched between the reflective display panel and the light guide plate, and it spaces the reflective display panel and the light guide plate apart defines a space between the reflective display panel and the light guide plate. The light permeable liquid is located in the space. The holding device holds the reflective display panel and the light guide plate, thereby pressing against the elastic ring and making the elastic ring deform.

Claims

1. A reflective display apparatus, comprising:

a reflective display panel;

a light guide plate;

an elastic ring sandwiched between the reflective display panel and the light guide plate, the elastic ring spacing the reflective display panel and the light guide plate apart and defining a space between the reflective display panel and the light guide plate, wherein the light guide plate has a trench, and wherein the elastic ring and the trench are fitted in an interference fitting connection;

a light permeable liquid located in the space; and

a holding device holding the reflective display panel and the light guide plate, thereby pressing against the elastic ring and making the elastic ring deform.

2. The reflective display apparatus of claim 1, wherein a freezing point of the light permeable liquid ranges from −

50°

C. to 0°

C.

3. The reflective display apparatus of claim 1, wherein the light permeable liquid is an inviscid fluid.

4. The reflective display apparatus of claim 1, wherein a material of the light permeable liquid is an ethylene glycol aqueous solution, a propylene glycol aqueous solution, a polyethylene glycol aqueous solution or a polypropylene glycol aqueous solution.

5. The reflective display apparatus of claim 1, wherein a material of the light permeable liquid comprises an alcohol-based compound, an antifoaming agent and water.

6. The reflective display apparatus of claim 1, further comprising a first buffer structure sandwiched between the holding device and the reflective display panel.

7. The reflective display apparatus of claim 1, further comprising a second buffer structure sandwiched between the holding device and the light guide plate.

8. The reflective display apparatus of claim 1, wherein the trench is an annular trench.

9. The reflective display apparatus of claim 1, wherein the light guide plate has a liquid injection channel being in spatially communication with the space.

10. The reflective display apparatus of claim 1, further comprising a light source located between the holding device and the light guide plate.