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US 11,913,985 B2Granted
Light source device including discharge lamp, irradiation device and distinguishing method for discharge lamp
AssigneePhoenix Electric Co., Ltd.
InventorTomihiko Ikeda
Life of this patent
Estimating the term…
Abstract
It is intended to provide an irradiation device that can achieve good starting performance even without encapsulating a starting performance promoting substance into the internal space of a luminous tube in a discharge lamp, and simultaneously, can distinguish whether the discharge lamp is a genuine product or not. An irradiation device (50) is composed of a discharge lamp (110) provided as a light source and an ultraviolet light source (200) irradiating ultraviolet light to the discharge lamp (110) to detect whether the discharge lamp (110) is a genuine product or not in activation of the discharge lamp (110).
Claims7
A light source device, comprising:
- a discharge lamp provided as a light source;
- an incandescent lamp;
- and
- a reflector container to which the discharge lamp and the incandescent lamp are attached;
- a controller having a function of continuously supplying a constant current to the incandescent lamp and measuring first and second values of voltage on both ends of the incandescent lamp connected to a pair of electric supply cables;
- and
- a determiner determining either that the discharge lamp is not the genuine product when a difference between the first and second values of voltage measured on the both ends does not fall within a predetermined value range or that the discharge lamp is the genuine product when the difference between the first and second values of voltage measured on the both ends falls within the predetermined value range, wherein
- the discharge lamp is lit when receiving rays of ultraviolet light irradiated from an ultraviolet light source provided outside.
5 more elements
An irradiation device, comprising:
- a discharge lamp provided as a light source;
- an ultraviolet light source irradiating ultraviolet light to the discharge lamp to detect whether the discharge lamp is a genuine product or not in activation of the discharge lamp;
- a discharge lamp power supply supplying an electric power for lighting to the discharge lamp;
- an ultraviolet light source power supply supplying an electric power for lighting to the ultraviolet light source;
- a discharge lamp switch conducting and blocking the electric power supplied from the discharge lamp power supply;
- an ultraviolet light source switch conducting and blocking the electric power supplied from the ultraviolet light source power supply;
- a controller having a function of turning on and off each of the discharge lamp switch and the ultraviolet light source switch, the controller performing a first action by turning on the discharge lamp switch while leaving the ultraviolet light source switch turned off, the controller performing a second action by turning on the ultraviolet light source switch and then turning on the discharge lamp switch while leaving the ultraviolet light source switch turned on;
- and
- a determiner determining either that the discharge lamp is not a genuine product when the discharge lamp has been lit by turning on the discharge lamp switch in both of the first and second actions or that the discharge lamp is a genuine product when the discharge lamp has been lit by turning on the discharge lamp switch only in the second action.
6 more elements
A distinguishing method for a discharge lamp, comprising:
- performing a first action by turning on a discharge lamp switch while leaving an ultraviolet light source switch turned off, the discharge lamp switch conducting and blocking an electric power supplied for lighting a discharge lamp from a discharge lamp power supply, the ultraviolet light source switch conducting and blocking an electric power supplied for lighting an ultraviolet light source from an ultraviolet light source power supply;
- performing a second action by turning on the ultraviolet light source switch and then turning on the discharge lamp switch while leaving the ultraviolet light source switch turned on;
- and
- determining either that the discharge lamp is not a genuine product when the discharge lamp has been lit by turning on the discharge lamp switch in both of the first and second actions or that the discharge lamp is a genuine product when the discharge lamp has been lit by turning on the discharge lamp switch only in the second action.
1 more element
Dependencies are inferred from the claim text.