TRANSMISSION TYPE DISPLAY APPARATUS

• US 20080129922A1
• Filed: 11/13/2007
• Published: 06/05/2008
• Est. Priority Date: 11/13/2006
• Status: Abandoned Application

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: Kanemitsu, Akiyoshi, Yamahara, Motohiro
• Application Number:
  US11/938,934
• Publication Number:
  US 20080129922A1
• Time in Patent Office: Days
• US Class Current: 349/62
• CPC Class Codes: G02F 1/133504 Diffusing, scattering, diffracting elements associated to illuminating devices G02F1/133606
• CPC Class Codes: G02F 1/133562 on the viewer side
• CPC Class Codes: G02F 1/133604 with lamps
• CPC Class Codes: G02F 1/133607 the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Abstract

The present invention provides a transmission type display apparatus (4) capable of maintaining uniform and high luminance with a smaller number of light sources (21, 22, . . . ).

The transmission type display apparatus (4) of the present invention comprises a transmission type liquid crystal display panel (5) and a surface emission light source device (1) that illuminates the transmission type liquid crystal display panel (5) with illuminating light (F1) from behind thereof, wherein the surface emission light source device emits collimated light (F1) toward the front side in the normal direction (a) over the entire surface, and a light diffusing part (7) is disposed on the front side of the transmission type liquid crystal display panel (5) for transmitting incident light (F2), that enters on the back surface thereof, while diffusing the light (F2) isotropically.

Claims

1. A transmission type display apparatus (4) comprising a transmission type liquid crystal display panel (5) and a surface emission light source device (1) that illuminates the transmission type liquid crystal display panel (5) with illuminating light (F1) from behind thereof, wherein the surface emission light source device (1) emits collimated light (F1) toward the front side in the normal direction (a) over the entire surface, and a light diffusing part (7) is disposed on the front side of the transmission type liquid crystal display panel (5) for transmitting incident light (F2) entering on the back surface while isotropically diffusing the light (F2).

2. The transmission type display apparatus (4) according to claim 1, wherein the surface emission light source device (1) comprises a plurality of light sources (21, 22, . . . ) disposed within a plane while being separated by a space (L) from each other, and a deflection plate (3) is disposed in front of the plurality of light sources (21, 22, . . . ) for changing the direction of lights (F11, F12, . . . ) from the plurality of light sources 21, 22, . . . ), and the deflection plate (3) is configured to direct the lights (F11, F12) from two adjacent light sources (21, 22) among the plurality of light sources (21, 22, . . . ) in a normal direction (a) toward the front surface over the entire surface between the two light sources (21, 22).