Display device, laser transfer printing method and laser transfer color donor sheet

• US 8,598,076 B2
• Filed: 12/28/2010
• Issued: 12/03/2013
• Est. Priority Date: 06/24/2010
• Status: Active Grant

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: E Ink Holdings Incorporated
• Inventors: Shu, Fang-An, Shinn, Ted-Hong, Tsai, Yao-Chou, Tang, Wen-Chung
• Primary Examiner(s): HIGGINS, GERARD T
• Application Number:
  US12/979,873
• Publication Number:
  US 20110315989A1
• Time in Patent Office: 1,071 Days
• Field of Search: 503/227, 430/253
• US Class Current: 503/227
• CPC Class Codes: B32B 2310/0843 using laser
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 37/025 Transfer laminating
• CPC Class Codes: B41M 2205/02 Dye diffusion thermal transfer printing (D2T2)
• CPC Class Codes: B41M 2205/38 Intermediate layers; Layers between substrate and imaging layer
• CPC Class Codes: B41M 5/38214 Structural details, e.g. multilayer systems composition of individual layers B41M5/42
• CPC Class Codes: B41M 5/426 characterised by inorganic compounds, e.g. metals, metal salts, metal complexes
• CPC Class Codes: B41M 5/44 characterised by the macromolecular compounds
• CPC Class Codes: G02F 1/133516 Methods for their manufacture, e.g. printing, electro-deposition or photolithography
• CPC Class Codes: G02F 1/133519 Overcoatings
• CPC Class Codes: H10K 71/18 using non-liquid printing techniques, e.g. thermal transfer printing from a donor sheet

Abstract

A display device includes a thin film transistor substrate, a display layer, a patterned color resist layer, a patterned UV block layer and a transparent protective layer. The thin film transistor substrate has a substrate and a plurality of thin film transistors. The display layer is disposed on the thin film transistor substrate. The patterned color resist layer is disposed on the display layer. The patterned UV block layer is disposed on the patterned color resist layer. The transparent protective layer is disposed on the patterned UV block layer. The present invention also provides a laser transfer printing method for fabricating the color resist layer and the patterned UV block layer.

Claims

1. A laser transfer printing method comprising:

providing a laser transfer color donor sheet having a stacked structure comprising a donor base, a light to heat conversion layer, a UV light blocking layer and a colored resist layer formed in the above mentioned order;

arranging the laser transfer color donor sheet on a display layer, the colored resist layer facing the display layer; and

providing laser light to irradiate the laser transfer color donor sheet to make the UV light blocking layer and the colored resist layer stripped to form a patterned colored resist layer and a patterned UV light blocking layer, the patterned colored resist layer and the patterned UV light blocking layer adhering on the display layer, the patterned colored resist layer located on the display layer, the patterned UV light blocking layer located on the patterned colored resist layer.

2. The laser transfer printing method as claimed in claim 1, wherein the patterned UV light blocking layer comprises a mixture of titanium dioxide and thermoplastic elastic resin.

3. The laser transfer printing method as claimed in claim 2, wherein the thermoplastic elastic resin comprises polyurethane resin or polyester resin.

4. The laser transfer printing method as claimed in claim 1, wherein the thickness of the patterned UV light blocking layer is 0.1˜

2.5 microns.