Touch device and control method and method for determining unlocking thereof

• US 9,727,233 B2
• Filed: 10/02/2014
• Issued: 08/08/2017
• Est. Priority Date: 07/30/2014
• Status: Active Grant

• Current Assignee: Wistron Corporation
• Original Assignee: Wistron Corporation
• Inventors: Hou, Chia-Chang
• Primary Examiner(s): Kujundzic, Dino
• Application Number:
  US14/504,429
• Publication Number:
  US 20160034172A1
• Time in Patent Office: 1,041 Days
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen
• CPC Class Codes: G06F 3/0425 using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected tracking a projected light spot to determine a position on a display surface G06F3/0386
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A touch device and a control method and a method for determining unlocking thereof are provided. The touch device includes image capturing units configured nearby a touch surface respectively, and light-reflected objects are configured around the touch surface. In this method, the image capturing units are used to detect a reflected signal to receive a first gesture on the touch surface when the touch device is operated in a touch-lock mode. The image capturing units emit a detecting signal along the touch plane and detect the reflected signal reflected from the detecting signal. It is determined whether the first gesture matches a first specific gesture. When the first gesture matches the first specific gesture, the touch device is operated in a touch-on mode. Touch information is provided when the touch device is operated in the touch-on mode but not provided when the touch device is operated in the touch-lock mode.

Claims

1. A touch device, comprising:

at least two image capturing units, respectively configured in different corners of a touch plane, wherein at least one light-reflected object is configured around the touch plane; and

a processing unit, coupled to the at least two image capturing units, wherein the at least two image capturing units emit a detecting signal along the touch plane, and the processing unit detects a reflected signal reflected from the detecting signal through the image capturing units,

wherein when the touch device is operated in a touch-lock mode, the processing unit detects the reflected signal through the at least two image capturing units, so as to receive a first gesture performed on the touch plane, and determines whether the first gesture matches a first specific gesture, and when the first gesture matches the first specific gesture, the processing unit controls the touch device to operate in a touch-on mode,

wherein when the touch device is operated in the touch-on mode, the processing unit provides touch information, and when the touch device is operated in the touch-lock mode, the processing unit does not provide the touch information,

wherein the processing unit analyses the reflecting signal to obtain a number of a plurality of blocking points and a plurality of positions of the blocking points on the touch plane, so as to obtain the first gesture, and

wherein the processing unit determines whether the first gesture is performed by a single hand by determining whether a first ratio between a distance between any two of the blocking points and a first side length of the touch plane is smaller than a first predetermined ratio, determining whether a second ratio between the distance and a second side length of the touch plane is smaller than a second predetermined ratio, and determining whether the distance complies with a reasonable range performed by the single hand according to the first ratio and the second ratio, so as to determine whether the first gesture matches the first specific gesture.

2. The touch device as claimed in claim 1, wherein the processing unit further determines whether the number of the blocking points is within a specific range, so as to determine whether the first gesture matches the first specific gesture.

3. The touch device as claimed in claim 1, wherein when the touch device is operated in the touch-on mode, the processing unit further detects a second gesture performed on the touch plane through the at least two image capturing units, and determines whether the second gesture matches a second specific gesture, and when the second gesture matches the second specific gesture, the processing unit controls the touch device to operate in the touch-lock mode.

4. The touch device as claimed in claim 1, wherein the touch device further includes an indicator used for indicating the touch-lock mode or the touch-on mode of the touch device.

5. A control method of a touch device, wherein the touch device comprises at least two image capturing units, the at least two image capturing units are respectively configured in different corners of a touch plane, and at least one light-reflected object is configured around the touch plane, the control method comprising:

using the at least two image capturing units to detect a reflected signal to receive a first gesture performed on the touch plane when the touch device is operated in a touch-lock mode, wherein the at least two image capturing units emit a detecting signal along the touch plane, and detect the reflected signal reflected from the detecting signal;

determining whether the first gesture matches a first specific gesture; and

making the touch device to operate in the touch-on mode when it is determined that the first gesture matches the first specific gesture,

wherein when the touch device is operated in the touch-on mode, the touch device provides touch information, and when the touch device is operated in the touch-lock mode, the touch device does not provide the touch information,

wherein the step of using the at least two image capturing units to detect the reflected signal to receive the first gesture performed on the touch plane when the touch device is operated in the touch-lock mode comprises;

analysing the reflected signal to obtain a number of a plurality of blocking points and a plurality of positions of the blocking points on the touch plane, so as to obtain the first gesture, and

wherein the step of determining whether the first gesture matches the first specific gesture comprises;

determining whether the first gesture is performed by a single hand by determining whether a first ratio between a distance between any two of the blocking points and a first side length of the touch plane is smaller than a first predetermined ratio, determining whether a second ratio between the distance and a second side length of the touch plane is smaller than a second predetermined ratio, and determining whether the distance complies with a reasonable range performed by the single hand according to the first ratio and the second ratio, so as to determine whether the first gesture matches the first specific gesture.

6. The control method of the touch device as claimed in claim 5, wherein the step of determining whether the first gesture matches the first specific gesture further comprises:

determining whether the number of the blocking points is within a specific range, so as to determine whether the first gesture matches the first specific gesture.

7. The control method of the touch device as claimed in claim 5, further comprising:

detecting a second gesture performed on the touch plane through the at least two image capturing units when the touch device is operated in the touch-on mode;

determining whether the second gesture matches a second specific gesture; and

making the touch device to operate in the touch-lock mode when the second gesture matches the second specific gesture.

8. The control method of the touch device as claimed in claim 5, wherein the touch device further comprises an indicator, and the control method further comprises:

indicating the touch-lock mode or the touch-on mode of the touch device through the indicator.

9. A method for determining unlocking, adapted to a touch device, the method for determining unlocking comprising:

detecting a first gesture performed on a touch plane when the touch device is operated in a touch-lock mode and no image is displayed;

determining whether the first gesture matches a first specific gesture; and

making the touch device to operate in a touch-on mode when it is determined that the first gesture matches the first specific gesture,

wherein when the touch device is operated in the touch-on mode, touch information is provided, and when the touch device is operated in the touch-lock mode, the touch information is not provided,

when the touch device is operated in the touch-lock mode and no image is displayed, the step of detecting the first gesture performed on the touch plane comprises;

using at least two image capturing units to emit a detecting signal along the touch plane;

detecting a reflected signal reflected from the detecting signal, so as to receive the first gesture performed on the touch plane; and

analysing the reflected signal to obtain a number of a plurality of blocking points and a plurality of positions of the blocking points on the touch plane, so as to obtain the first gesture,

wherein the step of determining whether the first gesture matches the first specific gesture comprises;

determining whether the first gesture is performed by a single hand by determining whether a first ratio between a distance between any two of the blocking points and a first side length of the touch plane is smaller than a first predetermined ratio, determining whether a second ratio between the distance and a second side length of the touch plane is smaller than a second predetermined ratio, and determining whether the distance complies with a reasonable range performed by the single hand according to the first ratio and the second ratio, so as to determine whether the first gesture matches the first specific gesture.

10. The method for determining unlocking as claimed in claim 9, wherein the touch device comprises the at least two image capturing units, the at least two image capturing units are respectively configured in different corners of the touch plane, and at least one light-reflected object is configured around the touch plane.

11. The method for determining unlocking as claimed in claim 10, further comprising:

detecting a second gesture performed on the touch plane through the at least two image capturing units when the touch device is operated in the touch-on mode;

determining whether the second gesture matches a second specific gesture; and

making the touch device to operate in the touch-lock mode when the second gesture matches the second specific gesture.

12. The method for determining unlocking as claimed in claim 9, wherein the step of determining whether the first gesture matches the first specific gesture further comprises:

determining whether the number of the blocking points is within a specific range, so as to determine whether the first gesture matches the first specific gesture.

13. The method for determining unlocking as claimed in claim 9, wherein the touch device further comprises an indicator, and the method for determining unlocking further comprises:

indicating the touch-lock mode or the touch-on mode of the touch device through the indicator.