Display device assembly and manufacture thereof

• US 8,797,633 B1
• Filed: 07/15/2010
• Issued: 08/05/2014
• Est. Priority Date: 07/23/2009
• Status: Active Grant

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: SiPix Imaging, Inc. (E Ink Holdings Incorporated)
• Inventors: Sprague, Robert A., Chan, Bryan Hans, Lin, Craig
• Primary Examiner(s): Rizkallah, Kimberly
• Assistant Examiner(s): Ligai, Maria
• Application Number:
  US12/837,350
• Time in Patent Office: 1,482 Days
• Field of Search: 257/E33.074, 257/E33.071, 257/258, 438/30, 359/296, 359/316, 349/58, 349/73, 349/74, 345/690, 345/55, 345/60, 345/107
• US Class Current: 359/296
• CPC Class Codes: G02B 5/0231 the surface having microprismatic or micropyramidal shape macroscopic prism arrays G02B5/045
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: G02B 5/0284 used in reflection
• CPC Class Codes: G02B 6/0053 Prismatic sheet or layer; Brightness enhancement element, sheet or layer
• CPC Class Codes: G02F 1/133504 Diffusing, scattering, diffracting elements associated to illuminating devices G02F1/133606
• CPC Class Codes: G02F 1/133507 Films for enhancing the luminance
• CPC Class Codes: G02F 1/133562 on the viewer side
• CPC Class Codes: G02F 1/1681 having two or more microcells partitioned by walls, e.g. of microcup type

Abstract

The present invention is directed to a display device assembly which comprises a display device and a luminance enhancement structure. The luminance enhancement structure is directly laminated onto an ITO layer with an adhesive. The assembly of the present invention provides improved performance of the luminance enhancement structure.

Claims

1. A display device assembly, comprising:

a) a display device comprising display cells filled with a display fluid, wherein said display cells are sandwiched between a backplane and a common electrode layer, and

b) a luminance enhancement structure on a viewing side of the display device, wherein said luminance enhancement structure has a one dimensional configuration and comprises grooves and columns in an alternating order, wherein each of said grooves has a cross-section comprising an apex angle and two edge lines and each of said columns has a flat top surface, and the flat top surface of the column is directly laminated to the common electrode layer without a substrate layer in between.

2. The assembly of claim 1, wherein said display fluid comprises charged pigment particles dispersed in a solvent or solvent mixture.

3. The assembly of claim 1, wherein said display fluid comprises one type of particles.

4. The assembly of claim 1, wherein said display fluid comprises two types of particles.

5. The assembly of claim 1, wherein said apex angle is in the range of about 5°

to about 50°

.