US-12625581-B1 - Optical navigation device and control device using the optical navigation device

Abstract

A control device comprising a processing circuit and an optical navigation device is disclosed. The optical navigation device comprises: a circuit board; an optical touch sensor, provided to the circuit board, configured to generate a touch sensing result; and a movement detecting device, configured to detect a movement of the optical touch sensor. The processing circuit generates a control signal according to the touch sensing result and the movement. The movement detecting device may be a proximity sensor and the circuit board may be a FPC.

Inventors

• Ching-Shun Chen

Assignees

• PIXART IMAGING INC.

Dates

Publication Date

20260512

Application Date

20250108

Claims (18)

1. 1 . An optical navigation device, comprising: a circuit board; an optical touch sensor, provided to the circuit board; and a movement detecting device, configured to detect a movement of the optical touch sensor; wherein the optical touch sensor is provided to a first surface of the circuit board and the movement detecting device is provided to a second surface of the circuit board or inside the circuit board or provided to a third surface opposite to the second surface; wherein the second surface is opposite to the first surface.
2. 2 . The optical navigation device of claim 1 , further comprising: elastic material, provided between the second surface and the third surface.
3. 3 . The optical navigation device of claim 2 , wherein the movement detecting device is surrounded by the elastic material.
4. 4 . The optical navigation device of claim 2 , wherein the movement detecting device is located between the elastic material and the second surface, or located between the elastic material and the third surface.
5. 5 . The optical navigation device of claim 1 , wherein the movement detecting device is a proximity sensor.
6. 6 . The optical navigation device of claim 1 , wherein the circuit board is a FPC.
7. 7 . A control device, comprising: a processing circuit; and an optical navigation device, comprising: a circuit board; an optical touch sensor, provided to the circuit board, configured to generate a touch sensing result; and a movement detecting device, configured to detect a movement of the optical touch sensor; wherein the processing circuit generates a control signal according to the touch sensing result and the movement; wherein the optical touch sensor is provided to a first surface of the circuit board and the movement detecting device is provided to a second surface of the circuit board or inside the circuit board or provided to a third surface opposite to the second surface; wherein the second surface is opposite to the first surface.
8. 8 . The control device of claim 7 , further comprising: elastic material, provided between the second surface and the third surface.
9. 9 . The control device of claim 8 , wherein the movement detecting device is surrounded by the elastic material.
10. 10 . The control device of claim 8 , wherein the movement detecting device is located between the elastic material and the second surface, or located between the elastic material and the third surface.
11. 11 . The control device of claim 7 , wherein the movement detecting device is a proximity sensor.
12. 12 . The control device of claim 7 , wherein the circuit board is a FPC.
13. 13 . The control device of claim 7 , wherein the processing circuit does not generate the control signal or generates the control signal which controls a target function to be non-activated, if the touch sensing result indicates the optical touch sensor is touched but the movement is below a movement threshold; wherein the processing circuit generates the control signal which controls the target function to be activated if the touch sensing result indicates the optical touch sensor is touched and the movement is above the movement threshold.
14. 14 . An optical navigation device, comprising: a circuit board; an optical touch sensor, provided to the circuit board; and a proximity sensor, configured to detect an approaching of a target object, wherein the approaching is for determining whether the optical navigation is really touched; wherein the optical touch sensor is provided to a first surface of the circuit board and the proximity sensor is provided to a second surface of the circuit board or inside the circuit board or provided to a third surface opposite to the second surface; wherein the second surface is opposite to the first surface.
15. 15 . The optical navigation device of claim 14 , further comprising: elastic material, provided between the second surface and the third surface.
16. 16 . The optical navigation device of claim 15 , wherein the proximity sensor is surrounded by the elastic material.
17. 17 . The optical navigation device of claim 15 , wherein the proximity sensor is located between the elastic material and the second surface, or located between the elastic material and the third surface.
18. 18 . A control device, comprising: a processing circuit; and an optical navigation device, comprising: a circuit board; an optical touch sensor, provided to the circuit board, configured to generate a touch sensing result; and a movement detecting device, configured to detect a movement of the optical touch sensor; wherein the processing circuit generates a control signal according to the touch sensing result and the movement; wherein the processing circuit does not generate the control signal or generates the control signal which controls a target function to be non-activated, if the touch sensing result indicates the optical touch sensor is touched but the movement is below a movement threshold; wherein the processing circuit generates the control signal which controls the target function to be activated if the touch sensing result indicates the optical touch sensor is touched and the movement is above the movement threshold.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical navigation device and a control device using the optical navigation device, and particularly relates to an optical navigation device which can avoid false triggering of the optical navigation device, and a control device using the optical navigation device. 2. Description of the Prior Art With the advancement of technology, optical navigation devices such as OFN (optical finger navigation) devices are becoming more and more popular. The user can use a control object such as a finger or a stylus to input instructions to the optical navigation device. However, the structure of conventional optical navigation devices makes it possible to have false triggering. For example, if the user lightly brushes against the optical navigation device while walking, or a certain part of the body is close to the optical navigation device, such actions may make false triggering of the optical navigation device, causing it to perform incorrect actions. However, conventional optical navigation devices usually have no mechanism to avoid false triggering. SUMMARY OF THE INVENTION One objective of the present invention is to provide an optical navigation device which can avoid false triggering. One objective of the present invention is to provide a control device which can avoid false triggering. One embodiment of the present application provides an optical navigation device, which comprises: a circuit board; an optical touch sensor, provided to the circuit board; and a movement detecting device, configured to detect a movement of the optical touch sensor. In one embodiment, the movement detecting device is a proximity sensor and the circuit board is a FPC. Another embodiment of the present application provides a processing circuit and an optical navigation device. The optical navigation device comprises: a circuit board; an optical touch sensor, provided to the circuit board, configured to generate a touch sensing result; and a movement detecting device, configured to detect a movement of the optical touch sensor. The processing circuit generates a control signal according to the touch sensing result and the movement. In one embodiment, the processing circuit does not generate the control signal or generates the control signal which controls a target function to be non-activated, if the touch sensing result indicates the optical touch sensor is touched but the movement is below a movement threshold. Besides, the processing circuit generates the control signal which controls the target function to be activated if the touch sensing result indicates the optical touch sensor is touched and the movement is above the movement threshold. In one embodiment, the movement detecting device is a proximity sensor and the circuit board is a FPC. Still another embodiment of the present invention discloses an optical navigation device, comprising: a circuit board; an optical touch sensor, provided to the circuit board; and a proximity sensor, configured to detect an approaching of a target object, wherein the approaching is for determining whether the optical navigation is really touched. In view of above-mentioned embodiment, the false triggering of the optical navigation device may be avoided, thereby the control device using the optical navigation device may be more accurate. These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram illustrating an optical navigation device according to one embodiment of the present invention, in which a movement detecting device is comprised. FIG. 2 is a schematic diagram illustrating an optical navigation device according to one embodiment of the present invention, in which a movement detecting device is comprised but the location of the movement detecting device is different from which in FIG. 1. FIG. 3 is a schematic diagram illustrating an optical navigation device according to one embodiment of the present invention, in which the elastic material is further comprised besides the movement detecting device. FIG. 4 is a schematic diagram illustrating an optical navigation device according to one embodiment of the present invention, in which the movement detecting device is surrounded by the elastic material. FIG. 5 is a schematic diagram illustrating an optical navigation device according to one embodiment of the present invention, in which the location of the elastic material is different from which in FIG. 3 and FIG. 4. FIG. 6 is a schematic diagram illustrating an optical navigation device according to one embodiment of the present invention, in which the movement detecting device is surrounded by the elastic material but the location of the movement de