Liquid crystal display and manufacturing method thereof

• US 9,244,320 B2
• Filed: 03/15/2013
• Issued: 01/26/2016
• Est. Priority Date: 10/29/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Jang, Dae Hwan, Park, Sang Ho, Kim, Dong Jo, Nam, Jung Gun, Lee, Dae-Young, Jo, Gug Rae
• Primary Examiner(s): NGUYEN, DUNG T
• Application Number:
  US13/840,832
• Publication Number:
  US 20140118656A1
• Time in Patent Office: 1,047 Days
• Field of Search: 349/44, 349 96- 98
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133548 Wire-grid polarisers
• CPC Class Codes: G02F 1/133611 including means for improving the brightness uniformity
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element

Abstract

A liquid crystal display includes a transparent insulation substrate, a first polarizer, and a semiconductor layer, a thin film transistor, and a backlight unit. The first polarizer is disposed on the transparent insulation substrate. The first polarizer includes a light blocking film and metal wires. The semiconductor layer, disposed on the light blocking film, has a perimeter aligned with a perimeter of the light blocking film. The thin film transistor, disposed on the semiconductor layer, includes a source region and a drain region disposed in the semiconductor layer. The backlight unit, disposed under the transparent insulation substrate, provides light to the transparent insulation substrate. The blocking film reflects substantially all of the light. Gaps are disposed between the metal wires.

Claims

1. A liquid crystal display, comprising:

a transparent insulation substrate;

a first polarizer comprising a light blocking film and a first plurality of metal wires, the first polarizer disposed on the transparent insulation substrate;

an interlayer buffer layer disposed on the light blocking film, the interlayer buffer layer having a perimeter aligned with a perimeter of the light blocking film;

a semiconductor layer disposed on the interlayer buffer layer, the semiconductor layer having a perimeter directly aligned with a perimeter of the interlayer buffer layer;

a thin film transistor disposed on the semiconductor layer, wherein the thin film transistor comprises a source region and a drain region; and

a backlight unit disposed under the transparent insulation substrate, the backlight unit providing light to the transparent insulation substrate,

wherein the light blocking film reflects substantially all of the light, and wherein gaps are disposed between the first plurality of metal wires.

2. The liquid crystal display of claim 1, wherein the interlayer buffer layer is disposed between the semiconductor layer and the light blocking film.

3. The liquid crystal display of claim 1, wherein a width of the gaps is less than a wavelength of the light provided by the backlight unit.

4. The liquid crystal display of claim 1, further comprising a first buffer layer disposed between the transparent insulation substrate and the first polarizer.

5. The liquid crystal display of claim 1, wherein the thin film transistor comprises a gate electrode and a gate insulating layer, the gate insulating layer disposed on the semiconductor layer and the gate electrode disposed on the gate insulating layer.

6. The liquid crystal display of claim 5, wherein the source and the drain regions are disposed in the semiconductor layer, and wherein the thin film transistor further comprises a source electrode connected to the source region and a drain electrode connected to the drain region.

7. The liquid crystal display of claim 6, further comprising a pixel electrode connected to the drain electrode of the thin film transistor.

8. The liquid crystal display of claim 1, wherein the light blocking film and the first plurality of metal wires include a common metal including at least one of Al, Au, Ag, Cu, Cr, Fe, and Ni.

9. The liquid crystal display of claim 1, further comprising a second polarizer comprising a second plurality of metal wires, the second plurality of metal wires spaced apart from each other at a predetermined distance smaller than a wavelength of the light from the backlight unit.

10. The liquid crystal display of claim 1, wherein an upper surface of the light blocking film is level with that of the first plurality of metal wires.

11. The liquid crystal display of claim 10, wherein each of the first plurality of metal wires has a predetermined thickness and a predetermined width, the predetermined thickness being at least 2.5 times than the predetermined width.

12. The liquid crystal display of claim 1, wherein the gaps include air.