REMOTE CONTROLLER AND DISPLAY SYSTEM

• US 20130131474A1
• Filed: 09/14/2012
• Published: 05/23/2013
• Est. Priority Date: 11/22/2011
• Status: Active Grant

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: GU, Ren-Hau, KAO, Ming-Tsan, HUANG, Sen-Huang
• Granted Patent: US 9,314,173 B2
• Time in Patent Office: Days
• US Class Current: 600/324
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/6897 Computer input devices, e.g. mice or keyboards
• CPC Class Codes: G06F 3/0304 Detection arrangements using opto-electronic means constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042
• CPC Class Codes: G06F 3/0354 with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
• CPC Class Codes: G08C 2201/00 Transmission systems of control signals via wireless link

Abstract

There is provided a remote controller including a plurality of press buttons, an optical finger mouse and a transmission interface. The press buttons are configured to trigger a control signal. The optical finger mouse is configured to detect a physiological characteristic and a displacement. The transmission interface is configured to output the control signal, the physiological characteristic and the displacement to a display device. There is further provided a display system.

Claims

1. A remote controller configured to detect and output a physiological characteristic of a finger and a control signal, the remote controller comprising:

a plurality of press buttons configured to trigger the control signal;

a first light source providing light of a first wavelength to the finger;

a second light source providing light of a second wavelength to the finger;

a light control unit configured to control on-states of the first light source and the second light source;

at least one image sensor receiving reflected light from the finger at a sampling frequency to generate a plurality of first image frames corresponding to the on-states of the first light source and a plurality of second image frames corresponding to the on-states of the second light source; and

a processing unit configured to calculate the physiological characteristic according to the first image frames and the second image frames, and to generate the control signal according to an operating state of the press buttons.

2. The remote controller as claimed in claim 1, wherein the processing unit divides each of the first image frames into at least two parts and calculates an average brightness of each part, and analyzes the average brightness of the each part of the first image frames to obtain a first intensity variation;

divides each of the second image frames into at least two parts and calculates an average brightness of each part, and analyzes the average brightness of the each part of the second image frames to obtain a second intensity variation; and

calculates the physiological characteristic according to the first intensity variation and the second intensity variation.

3. The remote controller as claimed in claim 2, wherein the processing unit further calculates a heart rate according to a comparison result of comparing at least one pulse threshold with at least one of the first intensity variation and the second intensity variation.

4. The remote controller as claimed in claim 1, wherein the physiological characteristic comprises a blood oxygenation and a heart rate.

5. The remote controller as claimed in claim 1, wherein the processing unit further compares a brightness value of the first image frames and the second image frames with at least one brightness threshold to identify a contact status.

6. The remote controller as claimed in claim 1, wherein the processing unit further calculates a displacement according to two of the first image frames, according to one of the first image frames and one of the second image frames, and according to two of the second image frames.

7. The remote controller as claimed in claim 1, wherein the light control unit alternatively enables the on-states of the first light source and the second light source such that the image sensor receives the reflected light associated with the first light source and the second light source alternatively;

or the light control unit simultaneously enables the on-states of the first light source and the second light source such that the image sensor receives the reflected light associated with the first light source and the second light source simultaneously, and the image sensor comprises an optical filter covering at least a part of a sensing surface thereof.

8. The remote controller as claimed in claim 1, wherein the first light source, the second light source, the light control unit, the at least one image sensor and the processing unit are packaged as a control chip to output the physiological characteristic and the control signal processed by at least one of an encoding process, a sequential process and a compressing process.

9. The remote controller as claimed in claim 1, further comprising a touch member for the finger to operate thereon, wherein the touch member is one of the press buttons or separated from the press buttons.

10. A remote controller for being operated by a user, the remote controller comprising:

a plurality of press buttons configured to trigger a control signal;

an optical finger mouse configured to detect a physiological characteristic of the user and a finger displacement; and

a transmission interface configured to output the control signal, the physiological characteristic and the finger displacement.

11. The remote controller as claimed in claim 10, wherein the optical finger mouse comprises:

a first light source providing light of a first wavelength to a finger of the user;

a second light source providing light of a second wavelength to the finger;

a light control unit configured to control on-states of the first light source and the second light source;

at least one image sensor receiving reflected light from the finger at a sampling frequency to generate a plurality of first image frames corresponding to the on-states of the first light source and a plurality of second image frames corresponding to the on-states of the second light source; and

a processing unit configured to calculate and output the physiological characteristic and the finger displacement according to the first image frames and the second image frames.

12. The remote controller as claimed in claim 11, wherein the processing unit divides each of the first image frames into at least two parts and calculates an average brightness of each part, and analyzes the average brightness of the each part of the first image frames to obtain a first intensity variation;

divides each of the second image frames into at least two parts and calculates an average brightness of each part, and analyzes the average brightness of the each part of the second image frames to obtain a second intensity variation; and

calculates the physiological characteristic according to the first intensity variation and the second intensity variation.

13. The remote controller as claimed in claim 12, wherein the processing unit further calculates a heart rate according to a comparison result of comparing at least one pulse threshold with at least one of the first intensity variation and the second intensity variation.

14. The remote controller as claimed in claim 11, wherein the processing unit further compares a brightness value of the first image frames and the second image frames with at least one brightness threshold to identify a contact status.

15. A display system, comprising:

a display device configured to display images; and

a remote controller configured to output a control signal and a physiological characteristic to the display device to control the display device to update the images being displayed according to the control signal and to display the physiological characteristic.

16. The display system as claimed in claim 15, wherein the display device generates a warning state when the physiological characteristic exceeds a predetermined value.

17. The display system as claimed in claim 15, wherein the remote controller comprises:

a first light source providing light of a first wavelength to a finger;

a second light source providing light of a second wavelength to the finger;

a light control unit configured to control on-states of the first light source and the second light source;

at least one image sensor receiving reflected light from the finger at a sampling frequency to generate a plurality of first image frames corresponding to the on-states of the first light source and a plurality of second image frames corresponding to the on-states of the second light source; and

a processing unit configured to calculate the physiological characteristic according to the first image frames and the second image frames, and to generate the control signal according to an operating state of a plurality of press buttons.

18. The display system as claimed in claim 17, wherein the processing unit divides each of the first image frames into at least two parts and calculates an average brightness of each part, and analyzes the average brightness of the each part of the first image frames to obtain a first intensity variation;

divides each of the second image frames into at least two parts and calculates an average brightness of each part, and analyzes the average brightness of the each part of the second image frames to obtain a second intensity variation; and

calculates the physiological characteristic according to the first intensity variation and the second intensity variation.

19. The display system as claimed in claim 17, wherein the processing unit further calculates a displacement according to two of the first image frames, according to one of the first image frames and one of the second image frames, and according to two of the second image frames;

and the remote controller outputs the displacement to the display device to accordingly control a cursor displayed by the display device.

20. The display system as claimed in claim 17, wherein the processing unit further calculates a heart rate according to a comparison result of comparing at least one pulse threshold with at least one of the first intensity variation and the second intensity variation.