Method for Manufacturing a Liquid Crystal Display

• US 20100139856A1
• Filed: 02/15/2010
• Published: 06/10/2010
• Est. Priority Date: 08/23/2005
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Hsieh, Fu-Cheng, Chen, Po-Lun, Wu, Po-Chang, Chang, Chih-Ming, Wu, Jin-Jei, Chiang, Chun-Hung, Huang, Ren-Hung, Lin, Tzu-Yuan
• Granted Patent: US 7,830,482 B2
• Time in Patent Office: Days
• US Class Current: 156/273.300
• CPC Class Codes: G02F 1/133753 with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
• CPC Class Codes: G02F 1/133757 with different alignment orientations
• CPC Class Codes: G02F 1/133773 the alignment material or treatment being different for the two opposite substrates
• CPC Class Codes: G02F 1/133788 by light irradiation, e.g. linearly polarised light photo-polymerisation
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]

Abstract

A method for manufacturing a transflective LCD panel having a transmissive region and a reflective region includes steps of providing an upper substrate and a lower substrate in parallel, forming a first alignment film on the upper substrate, forming a reflective layer on the reflective region of the lower substrate, forming an first insulating layer to cover the reflective layer and the lower substrate, forming a second insulating layer to cover the first insulating layer, forming positive and negative driving electrodes wrapped in the second insulating layer, forming a coplanar second alignment film to cover the second insulating layer, packaging the upper substrate and the lower substrate, and filling liquid crystal molecules.

Claims

1. A method for manufacturing a transflective LCD panel with a single cell gap design having a transmissive region and a reflective region, the method comprising:

providing an upper substrate;

forming a first alignment film on the upper substrate, including the steps of;

forming a UV curable polymer layer on the upper substrate; and

irradiating a UV beam on the UV curable polymer layer so that the UV curable polymer layer having a horizontal alignment in the transmissive region and a vertical alignment in the reflective region, respectively;

providing a lower substrate in parallel with the upper substrate;

forming a reflective layer on the reflective region of the lower substrate;

forming a first insulating layer to cover the reflective layer and the lower substrate;

forming a second insulating layer to cover the first insulating layer;

forming positive driving electrodes and negative driving electrodes wrapped in the second insulating layer and arranged alternately and levelly in the second insulating layer in both the transmissive region and the reflective region;

forming a coplanar second alignment film to cover the second insulating layer, the positive driving electrodes and the negative driving electrodes, wherein the coplanar second alignment film only with a horizontal alignment in both the transmissive region and the reflective region;

using a UV glue to package the upper substrate and the lower substrate so that the first alignment film and the second alignment film are opposite to each other; and

filling liquid crystal molecules between the first alignment film and the second alignment film.

2. The method of claim 1, wherein the first alignment film and the second alignment film in the transmissive region have a homogeneous alignment.

3. The method of claim 1, wherein the first alignment film and the second alignment film in the reflective region have a hybrid alignment.

4. The method of claim 1, wherein formation of the second alignment film comprises performing photo-alignment, rubbing, ion-beam, or tilt evaporation techniques.

5. The method of claim 1, wherein the insulating layer is substantially made of silicon nitride, silicon oxide, or silicon oxide nitride.

6. The method of claim 1, wherein irradiating a UV beam on the UV curable polymer layer comprises covering the UV curable polymer layer in the transmissive region by a photo resist layer and irradiating the UV curable polymer layer in the reflective region with the UV beam.