Liquid crystal display employing touch panel

• US 20010026330A1
• Filed: 02/26/2001
• Published: 10/04/2001
• Est. Priority Date: 03/28/2000
• Status: Abandoned Application

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Oh, Hyeok-jin
• Application Number:
  US09/791,730
• Publication Number:
  US 20010026330A1
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/13363 Birefringent elements, e.g. for optical compensation
• CPC Class Codes: G02F 1/1347 Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

Abstract

A liquid crystal display including a display panel having a plurality of substrate having electrodes formed thereon, alignment layers formed on the electrodes and firs liquid crystal filled between the substrates, a touch panel installed on the display panel, and having a plurality of substrates having aligned conductive layers, electrodes electrically connected with the conductive layers, a dot spacer disposed between the substrates, for maintaining the gap therebetween, and second liquid crystal filled between the substrates, for compensating for a phase difference of the display panel, and polarizing plates formed on the outer surfaces of the display panel and the touch panel. Since a compensating function is added to the touch panel integrally formed with the liquid crystal display, the thickness and weight of the display are greatly reduced.

Claims

1. A liquid crystal display comprising:

a display panel having a plurality of substrate having electrodes formed thereon, alignment layers formed on the electrodes and firs liquid crystal filled between the substrates;

a touch panel installed on the display panel, and having a plurality of substrates having aligned conductive layers, electrodes electrically connected with the conductive layers, a dot spacer disposed between the substrates, for maintaining the gap therebetween, and second liquid crystal filled between the substrates, for compensating for a phase difference of the display panel; and

polarizing plates formed on the outer surfaces of the display panel and the touch panel.

2. The liquid crystal display according to

claim 1

, wherein the liquid crystals are of a super twisted nematic type in which the twisted angles thereof are in the range of 180°

to 270.

3. The liquid crystal display according to

claim 1

, wherein the optical retardation of the second liquid crystal is the same as that of the first liquid crystal.

4. The liquid crystal display according to

claim 3

, wherein the twisted direction of the second liquid crystal is opposite to that of the first liquid crystal.

5. The liquid crystal display according to

claim 3

, wherein the rubbing direction of the second liquid crystal is perpendicular to that of the first liquid crystal.

6. The liquid crystal display according to

claim 1

, wherein the conductive layers are formed by coating conductive resist so as to have orientation.

7. The liquid crystal display according to

claim 1

, wherein the conductive layers are formed of a material having an alignment property.