Illuminated logo device

• US 6,874,903 B2
• Filed: 12/15/2003
• Issued: 04/05/2005
• Est. Priority Date: 04/22/2003
• Status: Active Grant

• Current Assignee: BenQ Corporation (Qisda Corporation)
• Original Assignee: BenQ Corporation (Qisda Corporation)
• Inventors: Chih, Ting-Hui, Yang, Pang-Lun
• Primary Examiner(s): LEE, Y MY QUACH
• Application Number:
  US10/734,229
• Publication Number:
  US 20040212983A1
• Time in Patent Office: 477 Days
• Field of Search: 362/26, 362/27, 362/29, 362/30, 362/31, 362/561, 362/812, 405/46, 349/58, 349/65
• US Class Current: 362/604
• CPC Class Codes: G02B 6/0063 for extracting light out both the major surfaces of the light guide
• CPC Class Codes: G02B 6/0086 Positioning aspects
• CPC Class Codes: Y10S 362/812 Signs

Abstract

The present invention is related to an illuminated logo device positioned in a display. The display has a light source and a light guiding plate, and the illuminated logo device has a logo, a casing, a lid, and a light transmitting device. The casing has an encapsulating space, and a groove with a first opening is arranged on the casing for receiving the logo. The lid is positioned above and a predetermined distance away from the casing. Moreover, the lid has a through hole corresponding to the first opening. The light transmitting device is positioned in the through hole and the first opening, and the light transmitting device has a first end surface and a second end surface. The first end surface of the light transmitting device is faced to the first opening and the second end surface contacts the light guiding plate for guiding lights of the light source to the logo via the light transmitting device and the light guiding plate, such that the logo is illuminated without any additional light source.

Claims

1. An illuminated logo device positioned on a display having a light source and a light guiding plate, lights of the light source being transmitted into the light guiding plate, the illuminated logo device comprising:

a logo;

a casing having an encapsulating space, and a groove being arranged on the casing for receiving the logo, the groove having a first opening;

a lid positioned above the casing and a predetermined distance away from the casing, the lid having a through hole corresponding to the first opening; and

a light transmitting device positioned in the through hole and the first opening, the light transmitting device having a first end surface and a second end surface;

wherein the first end surface of the light transmitting device is faced to the first opening and the second end surface contacts the light guiding plate for guiding lights of the light source to the logo via the light transmitting device and the light guiding plate, such that the logo is illuminated.

2. The illuminating logo device according to claim 1, wherein the light transmitting device is made of light-guiding material.

3. The illuminating logo device according to claim 2, wherein the light-guiding material is an acrylic material.

4. The illuminating logo device according to claim 1, wherein the light transmitting device has a third end surface positioned in the through hole, the first end surface has a first cross-sectional area, the second end surface has a second cross-sectional area, the third end surface has a third cross-sectional area, and the first cross-sectional area is smaller than the third cross-sectional area.

5. The illuminating logo device according to claim 4, wherein the second end cross-sectional area is smaller than the third cross-sectional area.

6. The illuminating logo device according to claim 1, wherein the second end surface of the light transmitting device is faced to a second opening of the light guiding plate.

7. The illuminating logo device according to claim 1, further comprising a reflective device installed outside the light transmitting device.

8. The illuminating logo device according to claim 7, wherein the reflective device is a light-reflecting film adhered to the light transmitting device.

9. The illuminating logo device according to claim 7, wherein the reflective device is a reflective lacquer capable of reflecting light coated on the light transmitting device.