Illumination device for a color liquid crystal display

• US 20030169385A1
• Filed: 03/04/2003
• Published: 09/11/2003
• Est. Priority Date: 03/05/2002
• Status: Abandoned Application

• Current Assignee: Citizen Electronics Company Limited
• Original Assignee: Citizen Electronics Company Limited
• Inventors: Okuwaki, Daisaku
• Application Number:
  US10/377,768
• Publication Number:
  US 20030169385A1
• Time in Patent Office: Days
• US Class Current: 349/65
• CPC Class Codes: G02B 6/0026 Wavelength selective element, sheet or layer, e.g. filter or grating
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0038 Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02F 1/133521 Interference filters
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 1/133616 Front illuminating devices

Abstract

An illuminating device has an LED, a lighting panel provided corresponding to the LED for guiding light emitted from the LED to illuminate an LCD. An interference filter is provided on a surface through which the light from the LED passes so as to correct chromaticity of the light.

Claims

1. An illuminating device comprising:

an LED;

a lighting panel provided corresponding to the LED for guiding light emitted from the LED to illuminate an LCD; and

an interference filter provided on a surface through which the light from the LED passes so as to correct chromaticity of the light.

2. The device according to claim 1 further comprising a light guide rod provided between the LED and the lighting panel so as to guide the light from the LED to the lighting panel.

3. The device according to claim 1 wherein the lighting panel is disposed above the LCD.