Optical mouse with uniform light projection

• US 6,927,759 B2
• Filed: 06/06/2003
• Issued: 08/09/2005
• Est. Priority Date: 06/06/2003
• Status: Active Grant

• Current Assignee: Unity OPTO Technology Company Limited
• Original Assignee: Unity OPTO Technology Company Limited
• Inventors: Hung, Hsien-yeh, Chang, Wei
• Primary Examiner(s): Shankar, Vijay
• Assistant Examiner(s): DHARIA, PRABODH M
• Application Number:
  US10/455,379
• Publication Number:
  US 20040246233A1
• Time in Patent Office: 795 Days
• Field of Search: 345156-160, 345162-168, 345/184, 345/145, 345/123, 345/185, 358/473, 250/557, 250/559, 382313-324, 382/150
• US Class Current: 345/166
• CPC Class Codes: G06F 3/0317 in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface
• CPC Class Codes: G06F 3/03543 Mice or pucks G06F3/03541 takes precedence

Abstract

An optical mouse includes a bottom casing, a top cover mounted to the bottom casing to define an interior space. A circuit board and a lens set are located in the interior space. The bottom casing has an opening. A detecting device is mounted to the circuit board. A receiving portion and a light emitting diode (LED) are mounted to a bottom side of the detecting device in alignment with a slot in the circuit board. A solder pad to which an electrical conductor is connected has a central bore and is positioned on a circumferential margin of a light projection surface of the LED to allow light projected from the light projection surface to transmit through the central bore. The lens set is located between the circuit board and the bottom casing, and includes a reflection member and a lens.

Claims

1. An optical mousing comprising:

a) a housing having;

i) a top cover; and

ii) a bottom casing connected to the top cover and forming an interior therebetween, the bottom casing having an opening;

b) a circuit board located in the interior and having;

i) a detecting device;

ii) a receiving portion located on a bottom of the detecting device and aligned with the opening; and

iii) an illumination device located on the bottom of the detecting device and having a chip having a light projection surface projecting a light beam, a solder pad connected to the light projection surface and having a central bore, and an electrical conductor connected to the solder pad, the light beam projecting through the central bore; and

c) a lens set connected to the bottom casing below the circuit board and having;

i) a reflection member located below the illumination device; and

ii) a first lens located below the receiving portion and aligned with the opening of the bottom casing.

2. The optical mousing according to claim 1, further comprising a second lens located between the illumination device and the reflection member.