Reflection-type liquid crystal display device having holographic color reflective film bonded to light absorbing layer

• US 5,729,313 A
• Filed: 05/17/1996
• Issued: 03/17/1998
• Est. Priority Date: 05/19/1995
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Mitsui, Seiichi
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Duong, Tai V.
• Application Number:
  US08/649,309
• Time in Patent Office: 669 Days
• Field of Search: 359/15, 359/22, 349/104, 349/105, 349/106, 349/114, 349/110, 349/165, 349/113
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133516 Methods for their manufacture, e.g. printing, electro-deposition or photolithography
• CPC Class Codes: G02F 1/13725 based on guest-host interaction G02F1/13762, G02F1/13737, take precedence
• CPC Class Codes: G02F 2203/02 reflective

Abstract

A reflection-type liquid crystal display device includes a first substrate formed of a material which allows transmission of visible light therethrough; a second substrate opposed to the first substrate; a liquid crystal layer interposed between the first substrate and the second substrate; a light absorbing layer provided on the second substrate for absorbing the visible light; and a holographic color reflective film provided on the light absorbing layer and having a light reflecting area for reflecting light of a prescribed wavelength range of the visible light.

Claims

1. A reflection-type liquid crystal display device, comprising:

a first substrate formed of a material which allows transmission of visible light therethrough;

a second substrate opposed to the first substrate;

a liquid crystal layer interposed between the first substrate and the second substrate;

a light absorbing layer provided on the second substrate for absorbing the visible light; and

a holographic color reflective film bonded to the light absorbing layer and having a light reflecting area for reflecting light of a prescribed wavelength range of the visible light.

2. A reflection-type liquid crystal display device according to claim 1, wherein the light absorbing layer and the holographic color reflective film are provided on a surface of the second substrate, the surface being opposed to the liquid crystal layer.

3. A reflection-type liquid crystal display device according to claim 1, including a plurality of pixels each having three picture elements respectively in correspondence with the RGB colors, wherein the holographic color reflective film has three light reflecting areas respectively for reflecting light of prescribed wavelength ranges corresponding to the RGB colors.

4. A reflection-type liquid crystal display device according to claim 1, wherein the liquid crystal layer contains guest-host liquid crystal molecules.