Flexible Display Panel

• US 20100060841A1
• Filed: 10/16/2008
• Published: 03/11/2010
• Est. Priority Date: 09/09/2008
• Status: Active Grant

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: E Ink Holdings Incorporated
• Inventors: Huang, Jen-Shiun, Lo, Chen-Lung, Shinn, Ted-Hong, Tsai, Yuan-Chih
• Granted Patent: US 7,929,101 B2
• Time in Patent Office: Days
• US Class Current: 349/150
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: H05K 2201/10128 Display
• CPC Class Codes: H05K 3/323 by applying an anisotropic conductive adhesive layer over an array of pads
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits

Abstract

A flexible display panel comprises a flexible substrate, a display module, a driving unit and at least one anisotropic conductive film. The display module is disposed on the flexible substrate, and has a display area and a peripheral circuit area beside the display area. The anisotropic conductive film is connected between the peripheral circuit area and the driving unit, and the driving unit is electrically connected to the peripheral circuit area through the anisotropic conductive film. In addition, the anisotropic conductive film has an insulation film and a plurality of conductive particles disposed in the insulation film. Diameters of the conductive particles are in a range from 4.5 micrometers to 7 micrometers, and a distribution density of the conductive particles is a range from 45000 grains per square millimeter to 65000 grains per square millimeter. Therefore, the flexible display panel has high reliability.

Claims

1. A flexible display panel, comprising:

a flexible substrate;

a display module disposed on the flexible substrate, the display module having a display area and a peripheral circuit area beside the display area;

a driving unit; and

at least one anisotropic conductive film connected between the peripheral circuit area and the driving unit, the driving unit being electrically connected to the peripheral circuit area through the anisotropic conductive film, the anisotropic conductive film having an insulation film and a plurality of conductive particles disposed in the insulation film, wherein diameters of the conductive particles are in a range from 4.5 micrometers to 7 micrometers and a distribution density of the conductive particles is in a range from 45000 grains per square millimeter to 65000 grains per square millimeter.

2. The flexible display panel as claimed in claim 1, wherein the driving unit comprises:

at least one flexible circuit board connected to the peripheral circuit area and contacting the anisotropic conductive film for being electrically connected to the peripheral circuit area through the anisotropic conductive film; and

at least one driving chip disposed on the flexible circuit board and electrically connected to the flexible circuit board.

3. The flexible display panel as claimed in claim 1, wherein the driving unit comprises at least one driving chip disposed on the peripheral circuit area and contacting the anisotropic conductive film for being electrically connected to the peripheral circuit area through the anisotropic conductive film.

4. The flexible display panel as claimed in claim 3, wherein the driving unit further comprises at least one flexible circuit board connected to the peripheral circuit area and contacting the anisotropic conductive film for being electrically connected to the peripheral circuit area through the anisotropic conductive film.

5. The flexible display panel as claimed in claim 1, wherein the diameters of the conductive particles are in a range from 5 micrometers to 6 micrometers.

6. The flexible display panel as claimed in claim 1, wherein the distribution density of the conductive particles is in a range from 50000 grains per square millimeter to 55000 grains per square millimeter.

7. The flexible display panel as claimed in claim 1, wherein the display module is one of an electrophoretic display module and a liquid crystal display module.

8. The flexible display panel as claimed in claim 1, wherein the flexible substrate is a plastic substrate.

9. The flexible display panel as claimed in claim 1, further comprising an insulation layer disposed between the flexible substrate and the display module.