ELECTRONIC DEVICE WITH INFRARED TOUCH INPUT FUNCTION

• US 20100090969A1
• Filed: 08/24/2009
• Published: 04/15/2010
• Est. Priority Date: 10/13/2008
• Status: Abandoned Application

• Current Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Inventors: HSIEH, KUAN-HONG, WANG, HAN-CHE, CHENG, HUA-DONG, YOU, RUEY-SHYANG, HE, ZU-PEI, ZHAO, XIN
• Application Number:
  US12/545,873
• Publication Number:
  US 20100090969A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen

Abstract

An electronic device with infrared touch input function is provided. The electronic device includes a display unit including two pairs of oppositely disposed sides defining an information display area; an infrared input device including a circuit board having two pairs of oppositely disposed sides defining an open area corresponding in size and shape to the information display area, a linear array of light emitting devices positioned on one side or two adjacent sides of the circuit board, configured for emitting infrared light; a micro-processing unit configured for generating control signals to control a corresponding light emitting device to emit infrared light, and determining whether the light detecting device receives the infrared light; and a central processing unit configured for controlling the display unit displaying a plurality of menu options determining whether the menu option is touched; and performing functions corresponding to the menu option when the menu option is touched.

Claims

1. An electronic device with infrared touch input function, comprising:

a display unit comprising two pairs of oppositely disposed sides defining an information display area;

an infrared input device comprising a circuit board having two pairs of oppositely disposed sides defining an open area corresponding in size and shape to the information display area,

a linear array of light emitting devices positioned on one side or two adjacent sides of the circuit board, configured for emitting infrared light;

at least one light detecting device positioned on one corner of the circuit board and faced to light emitting devices, configured for detecting infrared light emitted by the light emitting devices; and

a micro-processing unit configured for generating control signals to control a corresponding light emitting device to emit infrared light, and determining whether the light detecting device receives the infrared light; and

a central processing unit (CPU) electronically connected with an infrared input device and the display unit, configured for controlling the display unit displaying a plurality of menu options corresponding to light emitting devices, determining whether the menu option is touched by determining whether the light detecting device receives the infrared light; and

performing functions corresponding to the menu option when the menu option is touched.

2. The electronic device as claimed in claim 1, further comprising an encoder electronically connected between the light emitting devices and the micro-processor, configured for controlling the corresponding light emitting device to emit infrared light according to the control signals generated by the micro-processor, and sending a high voltage to the micro-processor when the light emitting device receives the infrared light.

3. The electronic device as claimed in claim 1, wherein the display unit is a flat panel display.

4. The electronic device as claimed in claim 1, wherein the light detecting device is an infrared phototransistor.

5. The electronic device as claimed in claim 1, wherein the light emitting device is an organic light emitting diode.

6. The electronic device as claimed in claim 1, wherein the micro-processor sends a high voltage to the CPU to perform the functions corresponding to the menu option when a time of the infrared light that is not received by the light detecting device lasts for a predetermined time in one circular scan.

7. The electronic device as claimed in claim 1, wherein the micro-processor sends a high voltage to the CPU to perform the functions corresponding to the menu option, when the micro-processor detects the infrared light from the same light emitting device is not received by the light detecting device in next one or two successive circular scans.

8. A method of controlling an electronic device with infrared touch input function, the electronic device comprising:

a display unit comprising two pairs of oppositely disposed sides defining an information display area;

an infrared input device comprising a circuit board having two pairs of oppositely disposed sides defining an open area corresponding in size and shape to the information display area;

a linear array of light emitting devices positioned on one side or two adjacent sides of the circuit board, configured for emitting infrared light;

at least one light detecting device positioned on one corner of the circuit board and faced to light emitting devices, configured for detecting infrared light emitted by the light emitting devices;

a micro-processing unit configured for generating control signals to control a corresponding light emitting device to emit infrared light, and determining whether the light detecting device receives the infrared light;

the method comprising;

controlling the display unit displaying a plurality of menu options corresponding to light emitting devices,

determining whether the menu option is touched by determining whether the light detecting device receives the infrared light; and

performing functions corresponding to the menu option when the menu option is touched.

9. The method of controlling an electronic device according to claim 8, wherein the electronic device further comprises an encoder electronically connected between the light emitting devices and the micro-processor, configured for controlling the corresponding light emitting device to emit infrared light according to the control signals generated by the micro-processor, and sending a high voltage to the micro-processor when the light detecting device receives the infrared light.

10. The method of controlling an electronic device according to claim 8, comprising:

the micro-processor sending a high voltage to the CPU to perform the functions corresponding to the menu option when a time of the infrared light that is not received by the light detecting device lasts for a predetermined time in one circular scan.

11. The method of controlling an electronic device according to claim 8, comprising:

the micro-processor sending a high voltage to the CPU to perform the functions corresponding to the menu option, when the micro-processor detects the infrared light from the same light emitting device is not received by the light detecting device in next one or two successive circular scans.

12. A method of controlling an electronic device with infrared touch input function, comprising:

controlling an Ith light emitting device to emit infrared light;

determining whether the infrared light is received;

determining a corresponding menu option is touched when the infrared light is not received; and

performing functions corresponding to the menu option being touched according to the signal.

13. The method of controlling an electronic device according to claim 12, comprising determining the corresponding menu option is not touched when the infrared light is received.

14. The method of controlling an electronic device according to claim 12, comprising:

determining whether I+1 is less than or equal to 8;

starting a new circular scan if the I+1 is equal to 8;

or

controlling an (I+1)th light emitting device to emit infrared light if the I+1 is less than 8.

15. The method of controlling an electronic device according to claim 12, comprising performing the functions corresponding to the menu option when a time of the infrared light that is not received by the light detecting device lasts for a predetermined time in one circular scan.

16. The method of controlling an electronic device according to claim 12, comprising performing the functions corresponding to the menu option, when the micro-processor detects the infrared light from the same light emitting device is not received by the light detecting device in next one or two successive circular scans.