Pointing device with an integrated optical structure

• US 20070146318A1
• Filed: 03/10/2005
• Published: 06/28/2007
• Est. Priority Date: 03/11/2004
• Status: Abandoned Application

• Current Assignee: Korea Electronics Technology Institute (Government of South Korea), Mobisol, Inc.
• Original Assignee: Korea Electronics Technology Institute (Government of South Korea), Mobisol, Inc.
• Inventors: Kim, Yoon, Kim, Tae, Chung, Kyoung, Yong, Dong, Juh, Sung, Hwang, Kyu, Jun, Sun, Oh, Seung, Jo, Jae, Cho, Kyu
• Application Number:
  US10/592,134
• Publication Number:
  US 20070146318A1
• Time in Patent Office: Days
• US Class Current: 345/157
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen

Abstract

The present invention relates to a micro-optical pointing device suitable for mobile terminals such as a cellular phone and PDA. A disclosed pointing device includes a light source emitting light rays to a subject; a contact member comprising a lattice type or perceivable pattern, which reflects an image of the moving subject; and an automatic transfer device restoring the contact member moved by a finger. The pointing device may further include a flip chip containing an image sensor, which converts the acquired image into an electronic signal, and a circuit for signal processing. The pointing device may include an integrated optical structure comprising a condensing lens, a specular surface, a light output part, and an image-formation lens. The pointing device may include a light guide structure that a parallel light prism lens, an image-formation lens, and a mask for blocking disturbance ray are formed into a single part.

Claims

1. A two-dimensional pointing device comprising:

a light source emitting light rays to a subject;

a contact member comprising a lattice type or perceivable pattern, the contact member reflecting an image of the moving subject after receiving the light from the light source;

a handling surface of image acquisition member positioned on the contact member, the handling surface of image acquisition member having a surface to increase friction force with a finger;

an image-formation optical lens condensing the light reflected from the contact member and sending the condensed light to an optical sensor;

an automatic transfer device restoring the contact member moved by the finger; and

the optical sensor receiving the image reflected from the optical lens and converting the image into an electronic signal.

2. The two-dimensional pointing device as defined by claim 1, wherein the handling surface of image acquisition member is made from rubber or has a surface prominence structure.

3. The two-dimensional pointing device as defined by claim 1, wherein the pointing device perceives that there is no operation when the restoring speed by the automatic transfer device is larger than a predetermined value.

4. The two-dimensional pointing device as defined by claim 1, wherein the automatic transfer device is formed of elastic material or magnetic material.

5. The two-dimensional pointing device as defined by claim 4, wherein the elastic material comprises rubber or silicon.

6. The two-dimensional pointing device as defined by claim 1, further comprising a touch sensor positioned around the contact member, wherein the touch sensor determines whether the pointing device is used or not according to whether a finger is in contact with the touch sensor or not.

7. The two-dimensional pointing device as defined by claim 6, wherein the touch sensor is used as a click button.

8. The two-dimensional pointing device as defined by claim 7, wherein the touch sensor is used as a click button when a finger is in contact with the touch sensor twice continuously in a predetermined period of time.

9. The two-dimensional pointing device as defined by claim 7, wherein the effective movement of the contact member is calculated by subtracting the movement of the contact member while the finger is away from the touch sensor from the whole movement of the contact member when the touch sensor is used as a click button.

10. The two-dimensional pointing device as defined by claim 1, further comprising a structure made from a transparent material, the structure being positioned under the contact member so that the contact member can be smoothly moved.

11. A two-dimensional pointing device comprising:

a light source emitting light rays to a subject;

an image acquisition member having a predetermined area, the image acquisition member reflecting light from the light source;

an image-formation lens condensing the light reflected from the image acquisition member;

a PCB on which a light source chip, a flip chip, and parts for constituting circuit are mounted, the PCB having an opening to pass an image from the image-formation lens; and

the flip chip containing an image sensor, which converts an image from the image-formation lens into an electronic signal, and a circuit for signal processing, the flip chip being positioned on the opposite side of the image-formation lens centering on the PCB.

12. The two-dimensional pointing device as defined by claim 11, wherein the flip chip is directly combined with the PCB of the pointing device without using an auxiliary PCB by containing a wafer-thin circuit formed using an RDL method on the surface of a wafer.

13. The two-dimensional pointing device as defined by claim 11, wherein the opening is formed of a transparent material.

14. The two-dimensional pointing device as defined by claim 11, further comprising an optical filter to intercept light unnecessary for the opening.

15. An optical device of a pointing device, comprising:

a light source emitting light rays to a subject;

an integrated optical structure comprising a condensing lens focusing light from the light source, a specular surface reflecting the condensed light, and a light output part passing and outputting the reflected light; and

a power and signal connection terminal supplying electricity and exchanging signal with the outside, the power and signal connection terminal being protruded outside.

16. The optical device of a pointing device as defined by claim 15, further comprising an optical system acquiring, condensing, and forming an image from the image acquisition member.

17. The optical device of a pointing device as defined by claim 16, wherein the optical system consisting of a light source, a condensing lens, a specular surface, and an optical output part, is formed into an integrated structure using a PCB or a circuit with similar functions.

18. The optical device of a pointing device as defined by claim 15, wherein the chief direction of light generated from the light source is different from the chief direction of the light outputted.

19. The optical device of a pointing device as defined by claim 15, wherein the specular surface is a total reflection plane or mirror plane.

20. The optical device of a pointing device as defined by claim 15, wherein the light output part is a plane or a concave-shaped or cylinder-shaped lens.

21. The optical device of a pointing device as defined by claim 15, wherein the integrated optical structure prevents an inflow of external light into the inside and an effluence of internal light into the outside through a region except output area.

22. An integrated two-dimensional pointing device comprising:

a light source emitting light rays to a subject;

a parallel light prism lens making light from the light source into parallel light and reflecting the parallel light;

a contact member receiving the parallel light from the parallel light prism lens and acquiring a motion image of the subject;

an image-formation lens concentrating an image from the contact member;

a mask blocking disturbance ray, the mask being positioned near the image-formation lens

an image sensor converting the image received from the image-formation lens into an electronic signal;

a housing integrally joined to the parallel light prism lens and the image-formation lens; and

a PCB on which the image sensor is fixed.

23. The integrated two-dimensional pointing device as defined by claim 22, further comprising an image sensor protection structure positioned under the image sensor to protect the image sensor.

24. The integrated two-dimensional pointing device as defined by claim 22, further comprising a touch sensor positioned around the contact member, wherein the touch sensor determines whether the pointing device is used or not according to whether a finger is in contact with the touch sensor or not.

25. The integrated two-dimensional pointing device as defined by claim 24, wherein the light source is turned off to be switched to a power saving mode when the finger is not in contact with the touch sensor.

26. The integrated two-dimensional pointing device as defined by claim 22, wherein the contact member is covered with hard coating or manufactured by using an inmold method which projects after adhesion of a film.

27. The integrated two-dimensional pointing device as defined by claim 22, wherein the contact member is formed of optical plastics of PMME or PC.

28. The integrated two-dimensional pointing device as defined by claim 22, wherein the parallel light prism lens, the image-formation lens, and the mask are formed into a single part of a light guide structure.

29. The integrated two-dimensional pointing device as defined by claim 28, wherein the light guide structure is formed of the same material with the contact member.

30. The integrated two-dimensional pointing device as defined by claim 22, wherein the parallel light prism lens is a halfround-shaped lens comprising an incidence plane, a specular surface, and an exit plane.

31. The integrated two-dimensional pointing device as defined by claim 22, wherein the parallel light prism lens comprises a prism and more than one lens.

32. The integrated two-dimensional pointing device as defined by claim 22, wherein the parallel light prism lens and the image-formation lens are formed into an integrated structure.

33. The integrated two-dimensional pointing device as defined by claim 22, further comprising:

a connector to join on a corresponding portable electronics; and

an FPCB connecting the PCB with the connector.