Projection type image display device
AssigneeHitachi, Ltd.
InventorsTatsuro Nakamura, Masaaki Takatsuji, Atsushi Maruyama
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Abstract
A theft preventing system easy to operate and capable of implementing countermeasures to theft of a projection type image display device is provided. The projection type image display device is equipped with a unit for detecting a used condition of the device and a unit for registering a used condition of the device. By further equipping the device with a unit for inhibiting normal operations of the device in its used condition other than the registered condition, a simple and easy-to-operate unauthorized use preventing system can be realized and thus protection of the device against theft can be attained.
Claims7
A projection type image display device provided with an unauthorized use preventing system comprising:
- a memory for storing a setting value of a predetermined function of said projection type image display device at a time of an authorized use;
- and
- a processor for imposing restrictions on the use of said projection type image display device operating with a button unit or a remote controller upon detection of a change made to the setting value,
- wherein the setting value indicates a setup condition of said projection type image display device, wherein, during the restrictions on the use of said projection type image display device, the processor releases the restrictions on the use of said projection type image display device when a legitimate password is input, and
- wherein the setting value indicates one of a “Lens Focus, Zoom Setup Condition”, a “Projected Image Distortion Correcting Value” and a “Projected Image Inversion Setup Condition.”
Dependencies are inferred from the claim text.