ELECTROMAGNETIC WAVE SENSING APPARATUS

• US 20100163713A1
• Filed: 01/07/2010
• Published: 07/01/2010
• Est. Priority Date: 03/10/2008
• Status: Abandoned Application

• Current Assignee: Lite-On Semiconductor Corporation (Lite-On Technology Corporation)
• Original Assignee: Lite-On Semiconductor Corporation (Lite-On Technology Corporation)
• Inventors: CHANG, PO-CHENG, LEI, CHIA-CHENG, CHENG, CHIA-CHU, WU, HSING-YEN, CHEN, MENG-KUN
• Application Number:
  US12/683,682
• Publication Number:
  US 20100163713A1
• Time in Patent Office: Days
• US Class Current: 250/214.AL
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3231 Monitoring the presence, absence or movement of users
• CPC Class Codes: G06F 1/3265 Power saving in display device
• CPC Class Codes: H04M 2250/12 including a sensor for measuring a physical value, e.g. temperature or motion telephones including GPS signal receivers H04M2250/10
• CPC Class Codes: H04W 52/027 by controlling a display operation or backlight unit
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

An electromagnetic wave sensing device and an operating method for the same are disclosed. The claimed device integrates signal transformation, operation and a sensing range configuration. Particularly, the sensing apparatus at least has two sensing units that respectively sense the ambient light and the electromagnetic wave with a specific range of spectrum. Moreover, a temperature sensor is further introduced to compensate the sensed signals by eliminating the temperature influence. Since the output of the sensing device can have a stable characteristic, the downstream manufacturers don'"'"'t need to use different hardware or software to adapt different product conditions. The preferred embodiment is to provide one electromagnetic wave sensing device having at least two sensing units for respectively sensing different ranges of electromagnetic waves. After signal transformation, the signals are outputted according to the working mode configured by a control unit.

Claims

1. An electromagnetic wave sensing device, comprising:

a first sensing unit, including at least a first sensing component, which is used to sense ambient light and generates a first sensing signal;

a second sensing unit, including at least a second sensing component, which is used to sense electromagnetic wave of a specific range and generates a second sensing signal;

a means of sensing signal process, which is used to receive the signals sensed by the first sensing unit and the second sensing unit, to perform signal transformation, in order to set the working mode of the electromagnetic wave sensing device, and to output the result accordingly;

a temperature sensor, which is used to measure temperature around the electromagnetic wave sensing device, and the value of measured temperature is transformed to electronic signal referred for correcting the sensed signals;

an emitter, coupled to the electromagnetic wave sensing device, for emitting detection signals;

a transmission interface, by which the electromagnetic wave sensing device is connected to a host;

a control unit connected with the transmission interface, for transferring the sensing signals to the host; and

a function selector, electrically connected with the first sensing unit, the second sensing unit and the temperature sensor, wherein one or more of the first sensing unit, the second sensing unit and the temperature sensor are initiated based on a selection.

2. The electromagnetic wave sensing device according to claim 1, wherein the first sensing unit and second sensing unit include one or more diode components, and these diode components having a substrate with PN interfacing, metal layer, polymer layer, or combination thereof stacked thereon.

3. The electromagnetic wave sensing device according to claim 1, wherein the means of sensing signal process is, through a signal transforming unit, to transform the sensing signals into linear-to-linear or linear-to-log electrical signals.

4. The electromagnetic wave sensing device according to claim 3, wherein the means of sensing signal process is performed by a signal transforming unit electrically connected with the control unit, for performing a transformation.

5. The electromagnetic wave sensing device according to claim 1, wherein the emitter is an internal emitter which is configured via the electromagnetic wave sensing device.

6. The electromagnetic wave sensing device according to claim 1, wherein the emitter is an external emitter which is disposed outside the electromagnetic wave sensing device and being configured via the host.

7. The electromagnetic wave sensing device according to claim 1, wherein the first sensing unit and the second sensing unit respectively includes at least an electromagnetic wave filter for filtering the electromagnetic wave range to an electromagnetic wave range that human eyes can discern or to a specific electromagnetic wave range.

8. The electromagnetic wave sensing device according to claim 7, wherein the electromagnetic wave range discernible by human eyes is 450 nm to 650 nm, in which the maximum peak is located at about 550 nm.

9. The electromagnetic wave sensing device according to claim 1, wherein the means of sensing signal process, by parameters, controls the first sensing unit or the second sensing unit to stop operating and operating time thereof.

10. The electromagnetic wave sensing device according to claim 1, wherein the means of sensing signal process is used to determine the electromagnetic wave sensing range of the first sensing component and the second sensing component.

11. The electromagnetic wave sensing device according to claim 1, wherein the electromagnetic wave sensing device further includes a means of coupling, so as to couple to other application components.

12. The electromagnetic wave sensing device according to claim 1, wherein the working modes include a full working mode, a sleep mode, and a semi-sleep mode for periodically initiating the electromagnetic wave sensing device.

13. An electromagnetic wave sensing device, comprising:

two or more electromagnetic light sensors, wherein each of the sensors is to sense a specific range of electromagnetic band and generate a corresponding sensing signal;

a temperature sensor, which is used to measure temperature around the electromagnetic wave sensing device, and the measured temperature is a basis for correcting the sensing signal;

an emitter, coupled to the electromagnetic wave sensing device, for emitting detection signals;

a transmission interface, by which the electromagnetic wave sensing device is connected to a host;

a control unit connected with the transmission interface, for transferring the sensing signals to the host;

a signal transforming unit electrically connected with the control unit, for transforming the signals into another state; and

a function selector, electrically connected with the signal transforming unit, the electromagnetic light sensors and the temperature sensor, wherein one or more of the electromagnetic light sensor and the temperature sensor are initiated based on a selection.

14. The electromagnetic wave sensing device according to claim 13, wherein the signal transforming unit is used to perform a photoelectric transformation in order to transform the sensing signals to electronic signals.

15. The electromagnetic wave sensing device according to claim 13, wherein the emitter is an internal emitter which is configured via the electromagnetic wave sensing device.

16. The electromagnetic wave sensing device according to claim 13, wherein the emitter is an external emitter which is disposed outside the electromagnetic wave sensing device and being configured via the host.

17. The electromagnetic wave sensing device according to claim 13, wherein the electromagnetic light sensors, through the signal transforming unit, transform the sensing signals into linear-to-linear or linear-to-log electrical signals.

18. The electromagnetic wave sensing device according to claim 17, wherein the electrical signal includes voltage or current signal.

19. The electromagnetic wave sensing device according to claim 13, wherein the electromagnetic wave sensing device further includes a coupling circuit, so as to couple to other application components.

20. The electromagnetic wave sensing device according to claim 13, wherein the transformed signals are used to set one of a plurality of working modes including a full working mode, a sleep mode, and a semi-sleep mode for periodically initiating the electromagnetic wave sensing device.