Display device and manufacturing method of the same

• US 8,477,251 B2
• Filed: 11/13/2007
• Issued: 07/02/2013
• Est. Priority Date: 03/27/2007
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Lee, Sang-Hun, Kim, Byoung-Joo, Huh, Chul, Kim, Gwan-Soo
• Primary Examiner(s): Le, Uyen Chau N
• Assistant Examiner(s): MOONEY, MICHAEL P
• Application Number:
  US11/939,155
• Publication Number:
  US 20080239214A1
• Time in Patent Office: 2,058 Days
• Field of Search: 349/12, 349/106, 349/110, 349/139, 349155-158, 349/160, 349/187, 430/7, 430/270.1, 345/173
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G03F 1/00 Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
• CPC Class Codes: G03F 7/0005 Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

A display device includes a first substrate including pixels and sensing electrodes corresponding with the pixels, and a second substrate facing the first substrate. The second substrate includes an organic layer with a black matrix dividing the pixels and a sensing spacer opposite to the sensing electrode. The organic layer including the black matrix and the sensing spacer may be formed in a single process using organic photoresist material. A mask includes a light-intercepting pattern including slits to block a portion of ultraviolet light emitted towards a photoresist layer to form the black matrix. The mask also includes a pattern to block ultraviolet light in a region corresponding to the sensing spacer if a negative type photoresist material is used, or the mask does not block ultraviolet light in the region corresponding to the sensing spacer if a positive type photoresist material is used.

Claims

1. A display device, comprising:

a first substrate comprising a plurality of pixels, at least one of the plurality of pixels comprising a sensing electrode;

a second substrate facing the first substrate and comprising an organic layer, the organic layer comprising a black matrix dividing the pixels and a sensing spacer corresponding to the sensing electrode, and the sensing spacer comprising a contact electrode formed thereon facing the sensing electrode; and

a cell-gap spacer in contact with at least one of the first substrate and the second substrate,

wherein the sensing spacer extends from the black matrix as a single body with a height to maintain the contact electrode separated from the sensing electrode without an external force and to maintain the contact electrode in contact with the sensing electrode in response to an external force.

2. The display device of claim 1, wherein the second substrate further comprises an insulating substrate on which the black matrix and the sensing spacer are arranged.

3. The display device of claim 1, wherein the second substrate further comprises:

a color filter arranged between portions of the black matrix; and

a transparent electrode layer comprising a common electrode arranged on the black matrix and the color filter, and the contact electrode arranged on the sensing spacer.

4. The display device of claim 3, wherein the transparent electrode layer receives a common voltage.

5. The display device of claim 3, wherein the cell-gap spacer is arranged on the common electrode.

6. The display device of claim 1, wherein the cell-gap spacer has a height greater than the height of the sensing spacer, and a height difference between the sensing spacer and the cell-gap spacer is about 0.2 um to about 1 um.

7. A method for manufacturing a display device, comprising:

forming a sensing electrode on a first insulating substrate;

forming a photoresist layer on a second insulating substrate;

exposing and developing the photoresist layer to simultaneously form a black matrix and a sensing spacer;

forming a color filter between portions of the black matrix;

forming a transparent electrode layer, the transparent electrode layer comprising a common electrode formed on the black matrix and the color filter, and a contact electrode formed on the sensing spacer; and

forming a cell-gap spacer on the common electrode,

wherein the sensing spacer extends from the black matrix as a single body with a height to maintain the contact electrode separated from the sensing electrode without an external force and to maintain the contact electrode in contact with the sensing electrode in response to an external force.

8. The method of claim 7, wherein the photoresist layer is a negative or positive type photoresist material.

9. The method of claim 7, further comprising:

assembling the first insulating substrate and the second insulating substrate, the sensing electrode being disposed corresponding to the sensing spacer; and

forming a liquid crystal layer between the first insulating substrate and the second insulating substrate.