1. A light source module comprising:
a cover unit having a pipe structure with one open end or two open ends;
a cap unit coupled to the one open end or two open ends of the cover unit;
a light source unit including a light emitting device, said light source unit mounted on the cap unit and covered by the cover unit; and
a wavelength conversion unit disposed in an internal space of the cover unit and coupled to the light source unit while covering the light emitting device, the wavelength conversion unit converting a wavelength of light emitted from the light emitting device to allow the wavelength-converted light to be emitted through the cover unit,
wherein the wavelength conversion unit includes a compound of a resin and a single type or a plurality of types of phosphor.
2. The light source module of claim 1, wherein the wavelength conversion unit has a pipe structure with one open end or two open ends, and is disposed parallel to the cover unit within the internal space of the cover unit.
3. A light source module comprising:
a cover unit having a pipe structure with one open end or two open ends;
a cap unit coupled to the one open end or two open ends of the cover unit;
a light source unit including a light emitting device, said light source unit mounted on the cap unit and covered by the cover unit; and
a wavelength conversion unit disposed in an internal space of the cover unit and coupled to the light source unit while covering the light emitting device, the wavelength conversion unit converting a wavelength of light emitted from the light emitting device to allow the wavelength-converted light to be emitted through the cover unit,
wherein the wavelength conversion unit includes a light transmission tube having a double wall structure with an accommodating space between an outer and inner wall, and a wavelength conversion material disposed in the accommodating space.
4. The light source module of claim 3, wherein the wavelength conversion material includes a compound of a resin and a single type or a plurality of types of phosphor, or a liquid-state quantum dot phosphor.
5. A light source module comprising
a cover unit having a pipe structure with one open end or two open ends;
a cap unit coupled to the one open end or two open ends of the cover unit;
a light source unit including a light emitting device, said light source unit mounted on the cap unit and covered by the cover unit; and
a wavelength conversion unit disposed in an internal space of the cover unit and coupled to the light source unit while covering the light emitting device, the wavelength conversion unit converting a wavelength of light emitted from the light emitting device to allow the wavelength-converted light to be emitted through the cover unit,
wherein the wavelength conversion unit includes a light transmission tube, wherein a compound of a resin and a single type or a plurality of types of phosphor is coated on at least one of an inner peripheral surface and an outer peripheral surface of the light transmission tube.
6. The light source module of claim 2, wherein the wavelength conversion unit further includes a core formed of a light guide material disposed in an internal space of the wavelength conversion unit.
7. The light source module of claim 1, wherein the light source unit includes:
a substrate having the light emitting device mounted thereon; and
a reflecting part formed on the substrate and having an inner reflective surface in a central portion thereof exposed to the light emitting device, the inner reflective surface reflecting the light emitted from the light emitting device inwardly to the wavelength conversion unit.
8. The light source module of claim 7, wherein the reflecting part has a coupling groove at an edge of the inner reflective surface facing the wavelength conversion unit, the coupling groove having one end of the wavelength conversion unit coupled thereto, and
the wavelength conversion unit coupled to the coupling groove is fixed to face the light emitting device.
9. The light source module of claim 7, wherein the light source unit further includes a lens covering the light emitting device and disposed in a space surrounded by the inner reflective surface.
10. The light source module of claim 1, further comprising an auxiliary reflecting part disposed on an inner surface of a closed end of the cover unit having one open end, and coupled to the wavelength conversion unit to thereby fix the wavelength conversion unit together with the light source unit, the wavelength conversion unit having one end coupled to the light source unit and another end coupled to the auxiliary reflecting part.
11. The light source module of claim 1, wherein the cap unit includes an external terminal having one end protruding outwardly and another end electrically connected to the light emitting device and supplying power to the light emitting device.
12. An illumination apparatus comprising:
a light source module including:
a cover unit having a pipe structure with one open end or two open ends;
a cap unit coupled to the one open end or two open ends of the cover unit;
a light source unit including a light emitting device, said light source unit mounted on the cap unit and covered by the cover unit; and
a wavelength conversion unit disposed in an internal space of the cover unit and coupled to the light source unit while covering the light emitting device, the wavelength conversion unit converting a wavelength of light emitted from the light emitting device to allow the wavelength-converted light to be emitted through the cover unit; and
a frame unit including one or more light source modules detachably mounted thereon and supplying power to the one or more light source modules.
13. The illumination apparatus of claim 12, wherein the frame unit includes at least two light source modules detachably mounted thereon, the at least two light source modules are arranged in at least one of a horizontal and vertical direction.
14. The illumination apparatus of claim 12, wherein the one or more light source modules are arranged in a circular manner.
15. A light source module comprising:
a housing;
a light source unit for emitting light; and
a wavelength conversion unit for converting a wavelength of light emitted from the light source unit,
wherein the light source unit and wavelength conversion unit are arranged within an internal space of the housing such that at least a portion of the light emitted from the light source unit passes through the wavelength conversion unit.
16. The light source module of claim 15, further including a reflecting part for reflecting light emitted from the light source unit to the wavelength conversion unit.
17. The light source module of claim 16, wherein the reflecting part extends from the light source unit to the wavelength conversion unit.
18. The light source module of claim 17, wherein the reflecting part includes an inner reflective surface extending from the light source unit to the wavelength conversion unit and an outer reflective surface extending from an outer surface of the wavelength conversion unit to an inner surface of the housing.
19. The light source module of claim 15, further including an external terminal having one end protruding outwardly from an end of the housing and another end electrically connected to the light source unit for supplying power to the light source unit.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A radio frequency identification (RFID) reader comprising:
an excitation signal generator and a resonant filter that combined are capable of generating and transmitting a detection signal;
an RFID device detector for measuring a detector parameter indicative of a change in effective inductance of the resonant filter; and a detection signal receiver for determining whether an RFID device is in proximity of the RFID reader based on observing the change in effective inductance, wherein the resonant filter has an input and an output and comprises:
an inductor having a first node and a second node wherein the first node is connected to the input and the second node is connected to the output; and
a capacitor having a first node and a second node wherein the first node is connected to the output and the second node is connected to a constant voltage potential.
2. The RFID reader as defined in claim 1, wherein the RFID device detector comprises a comparator.
3. The RFID reader as defined in claim 1, wherein the RFID device detector comprises an Analog-to-Digital converter.
4. The RFID reader as defined in claim 1, wherein the excitation signal generator and the detection signal receiver are included among the elements of an RFID controller.
5. The RFID reader as defined in claim 4, wherein the RFID controller further comprises a response signal demodulator for extracting data from a response signal received from the RFID device.
6. The RFID reader as defined in claim 5, further comprising a response signal receiver for receiving the response signal.
7. A radio frequency identification (RFID) reader comprising:
an excitation signal generator and a resonant filter that combined are capable of generating and transmitting a detection signal;
an RFID device detector for measuring a detector parameter indicative of a change in effective inductance of the resonant filter; and a detection signal receiver for determining whether an RFID device is in proximity of the RFID reader based on observing the change in effective inductance, wherein the resonant filter has an input and an output and comprises:
a resistor having a first node and a second node wherein the first node is connected to the input;
a first capacitor having a first node and a second node wherein the first node is connected to the second node of the resistor and the second node is connected to a constant voltage potential;
a second capacitor having a first node and a second node wherein the first node is connected to the second node of the resistor and the second node is connected to the output;
an inductor having a first node and a second node wherein the first node is connected to the output and the second node is connected to the constant voltage potential.
8. The RFID reader as defined in claim 7, wherein the RFID device detector has an input and an output and comprises:
a first capacitor having a first node and a second node wherein the first node is connected to the input;
a diode having an anode and a cathode wherein the anode is connected to the second node of the first capacitor and the cathode is connected to a constant voltage potential;
a resistor having a first node and a second node wherein the first node is connected to the second node of the first capacitor and the second node is connected to the output; and
a second capacitor having a first node and a second node wherein the first node is connected to the output and the second node is connected to the constant voltage potential.
9. The RFID reader as defined in claim 7, wherein the RFID device detector comprises a peak detector.
10. The RFID reader as defined in claim 7, wherein the RFID device detector comprises a slope detector.
11. The RFID reader as defined in claim 7, wherein the RFID device detector comprises a comparator.
12. The RFID reader as defined in claim 7, wherein the RFID device detector comprises an Analog-to-Digital converter.
13. A radio frequency identification (RFID) reader comprising:
an excitation signal generator and a resonant filter that combined are capable of generating and transmitting a detection signal;
an RFID device detector for measuring a detector parameter indicative of a change in effective inductance of the resonant filter; and a detection signal receiver for determining whether an RFID device is in proximity of the RFID reader based on observing the change in effective inductance, wherein the RFID device detector has an input and an output and comprises:
a first capacitor having a first node and a second node wherein the first node is connected to the input;
a diode having an anode and a cathode wherein the anode is connected to the second node of the first capacitor and the cathode is connected to a constant voltage potential;
a resistor having a first node and a second node wherein the first node is connected to the second node of the first capacitor and the second node is connected to the output; and
a second capacitor having a first node and a second node wherein the first node is connected to the output and the second node is connected to the constant voltage potential.
14. A radio frequency identification (RFID) reader comprising:
an excitation signal generator and a resonant filter that combined are capable of generating and transmitting a detection signal;
an RFID device detector for measuring a detector parameter indicative of a change in effective inductance of the resonant filter; and a detection signal receiver for determining whether an RFID device is in proximity of the RFID reader based on observing the change in effective inductance, wherein the RFID device detector comprises a peak detector or a slope detector.
15. A method for detecting the presence of a radio frequency identification (RFID) device in the proximity of an RFID reader by observing a change in effective inductance of a resonant filter of the RFID reader, the method comprising:
generating and transmitting a detection signal;
measuring at least one detector parameter indicative of the change in effective inductance; and
determining whether the RFID device is present,
wherein prior to generating and transmitting the method is in a detection sleep state and the method further comprises:
awakening from the detection sleep state at a preselected time;
when the RFID device has been determined not to be present, returning to the detection sleep state; and
when the RFID device has been determined to be present, exiting the detection sleep state.
16. The method as defined in claim 15, wherein the detection sleep state enables energy savings by the RFID reader.
17. The method as defined in claim 15, wherein the detection signal is such that the resonant filter may not achieve steady state during the time period of generation and transmission.
18. The method as defined in claim 15, wherein the at least one detector parameter comprises a voltage.
19. The method as defined in claim 15, wherein the at least one detector parameter comprises a current.
20. The method as defined in claim 15, wherein determining whether the RFID device is present comprises comparing the at least one detector parameter to a threshold.
21. The method as defined in claim 15, wherein determining whether the RFID device is present comprises decision criteria that are static.
22. A method for detecting the presence of a radio frequency identification (RFID) device in the proximity of an RFID reader by observing a change in effective inductance of a resonant filter of the RFID reader, the method comprising:
generating and transmitting a detection signal;
measuring at least one detector parameter indicative of the change in effective inductance; and
determining whether the RFID device is present, wherein determining whether the RFID device is present comprises comparing the at least one detector parameter to an average of a set of previous detector parameter measurements.
23. A method for detecting the presence of a radio frequency identification (RFID) device in the proximity of an RFID reader by observing a change in effective inductance of a resonant filter of the RFID reader, the method comprising:
generating and transmitting a detection signal;
measuring at least one detector parameter indicative of the change in effective inductance; and
determining whether the RFID device is present,
wherein determining whether the RFID device is present comprises comparing the at least one detector parameter to a majority vote based on a set of previous detector parameter measurements.
24. A method for detecting the presence of a radio frequency identification (RFID) device in the proximity of an RFID reader by observing a change in effective inductance of a resonant filter of the RFID reader, the method comprising:
generating and transmitting a detection signal;
measuring at least one detector parameter indicative of the change in effective inductance; and
determining whether the RFID device is present,
wherein determining whether the RFID device is present comprises decision criteria that are dynamic.
25. The method as defined in claim 24, wherein the decision criteria are self calibrating.
26. An apparatus for detecting the presence of a radio frequency identification (RFID) device in the proximity of an RFID reader by observing a change in effective inductance of a resonant filter of the RFID reader, the apparatus comprising:
means for generating and transmitting a detection signal;
means for measuring at least one detector parameter indicative of the change in effective inductance; and
means for determining whether the RFID device is present,
wherein, prior to generating and transmitting a detection signal, the apparatus is in a detection sleep state and the apparatus further comprises:
means for awakening from the detection sleep state at a preselected time;
means for, when the RFID device has been determined not to be present, returning to the detection sleep state; and
means for, when the RFID device has been determined to be present, exiting the detection sleep state.
27. The apparatus as defined in claim 26, wherein the detection sleep state enables energy savings by the RFID reader.
28. The apparatus as defined in claim 26, wherein the detection signal is such that the resonant filter may not achieve steady state during the time period of generation and transmission.
29. The apparatus as defined in claim 26, wherein the at least one detector parameter comprises a voltage.
30. The apparatus as defined in claim 26, wherein the at least one detector parameter comprises a current.
31. The apparatus as defined in claim 26, wherein the means for determining whether the RFID device is present comprises means for comparing the at least one detector parameter to a threshold.
32. The apparatus as defined in claim 26, wherein the means for determining whether the RFID device is present comprises decision criteria that are static.
33. An apparatus for detecting the presence of a radio frequency identification (RFID) device in the proximity of an RFID reader by observing a change in effective inductance of a resonant filter of the RFID reader, the apparatus comprising:
means for generating and transmitting a detection signal;
means for measuring at least one detector parameter indicative of the change in effective inductance; and
means for determining whether the RFID device is present, wherein the means for determining whether the RFID device is present comprises means for comparing the at least one detector parameter to an average of a set of previous detector parameter measurements.
34. An apparatus for detecting the presence of a radio frequency identification (RFID) device in the proximity of an RFID reader by observing a change in effective inductance of a resonant filter of the RFID reader, the apparatus comprising:
means for generating and transmitting a detection signal;
means for measuring at least one detector parameter indicative of the change in effective inductance; and
means for determining whether the RFID device is present, wherein the means for determining whether the RFID device is present comprises means for comparing the at least one detector parameter to a majority vote based on a set of previous detector parameter measurements.
35. An apparatus for detecting the presence of a radio frequency identification (RFID) device in the proximity of an RFID reader by observing a change in effective inductance of a resonant filter of the RFID reader, the apparatus comprising:
means for generating and transmitting a detection signal;
means for measuring at least one detector parameter indicative of the change in effective inductance; and
means for determining whether the RFID device is present, wherein the means for determining whether the RFID device is present comprises decision criteria that are dynamic.
36. The apparatus as defined in claim 34, wherein the decision criteria are self calibrating.