ELECTROPHORETIC DISPLAY APPARATUS

• US 20130241816A1
• Filed: 09/14/2012
• Published: 09/19/2013
• Est. Priority Date: 03/16/2012
• Status: Abandoned Application

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: E Ink Holdings Incorporated
• Inventors: Tang, Wen-Chung, Shu, Fang-An, Tsai, Yao- Chou, Shinn, Ted-Hong
• Application Number:
  US13/615,694
• Publication Number:
  US 20130241816A1
• Time in Patent Office: Days
• US Class Current: 345/107
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 1/1676 Electrodes
• CPC Class Codes: G02F 1/1677 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: G02F 2203/09 transflective
• CPC Class Codes: G09G 2300/0456 with a reflective area and a transmissive area combined in one pixel, such as in transflectance pixels
• CPC Class Codes: G09G 3/344 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167

Abstract

An electrophoretic display apparatus including a substrate and an electrophoretic display film is provided. The substrate has multiple pixel units, each the pixel unit has a transparent region and a reflective region and each the pixel unit includes a pixel electrode and a reflective layer. The pixel electrode is located in the transparent region and the reflective region. The reflective layer is disposed on the pixel electrode and located in the reflective region. The electrophoretic display film is disposed on the substrate and includes a common electrode and multiple microcapsules disposed between the common electrode and the pixel units, in which each the microcapsule includes multiple black electrophoretic particles, and the arrangement of the black electrophoretic particles is controlled by a driving voltage applied between the pixel electrode of each the pixel unit and the common electrode of the electrophoretic display film.

Claims

1. An electrophoretic display apparatus, comprising:

a substrate, having a plurality of pixel units, wherein each of the pixel units has a transparent region and a reflective region and each of the pixel units comprises;

a pixel electrode, located in the transparent region and the reflective region; and

a reflective layer, disposed on the pixel electrode and located in the reflective region; and

an electrophoretic display film, disposed on the substrate and the electrophoretic display film comprising;

a common electrode; and

a plurality of microcapsules, disposed between the common electrode and the pixel units, wherein each of the microcapsules comprises a plurality of black electrophoretic particles, and an arrangement of the black electrophoretic particles is controlled by a driving voltage applied between the pixel electrode of each the pixel unit and the common electrode of the electrophoretic display film.

2. The electrophoretic display apparatus as claimed in claim 1, further comprising a binder disposed between the common electrode and the substrate, wherein the microcapsules are distributed in the binder.

3. The electrophoretic display apparatus as claimed in claim 2, wherein each of the microcapsules further comprises an electrophoretic liquid, wherein the black electrophoretic particles are distributed in the electrophoretic liquid.

4. The electrophoretic display apparatus as claimed in claim 1, wherein each of the microcapsules further comprises a microcup structure and an electrophoretic liquid, the black electrophoretic particles are distributed in the electrophoretic liquid and the electrophoretic liquid and the black electrophoretic particles are enclosed in the microcup structure.

5. The electrophoretic display apparatus as claimed in claim 1, further comprising a color filter film disposed on the common electrode of the electrophoretic display film.

6. The electrophoretic display apparatus as claimed in claim 5, further comprising a transparent optical adhesive layer disposed between the binder of the electrophoretic display film and the substrate.

7. The electrophoretic display apparatus as claimed in claim 1, further comprising a color filter film disposed between the binder of the electrophoretic display film and the substrate.

8. The electrophoretic display apparatus as claimed in claim 7, further comprising a transparent optical adhesive layer disposed between the color filter film and the binder of the electrophoretic display film.

9. The electrophoretic display apparatus as claimed in claim 1, wherein when a high-frequency AC voltage is applied between each the pixel electrode and the common electrode, the black electrophoretic particles are in a vertical arrangement so that a light penetrates the transparent regions to enter the electrophoretic display film for displaying.

10. The electrophoretic display apparatus as claimed in claim 1, wherein when a low-frequency AC voltage or a DC voltage is applied between each the pixel electrode and the common electrode, the black electrophoretic particles are dispersedly arranged in the transparent region and the reflective region of each the pixel unit so that a light is unable to penetrate the electrophoretic display film.

11. The electrophoretic display apparatus as claimed in claim 1, wherein a material of the pixel electrode comprises indium oxide (IO), tin oxide (TO), indium tin oxide (ITO) or indium zinc oxide (IZO).

12. The electrophoretic display apparatus as claimed in claim 1, wherein a material of the reflective layer comprises metal or alloy.

13. The electrophoretic display apparatus as claimed in claim 1, wherein a material of the reflective layer comprises titanium dioxide.