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US 8,523,368 B2Granted
Projection display apparatus having stored information for authenticating light source
AssigneeSanyo Electric Co., Ltd.
InventorsTakeshi Fujisaki, Hiromitsu Okuno
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Abstract
A projection image display apparatus including a detachably attachable light source unit includes: a storage means provided to the light source unit and having previously stored therein information that the light source unit is a genuine product; a determination means making a comparison with the information in the storage means to determine whether the light source unit is the genuine product; and a light source control means controlling an output of the light source unit in accordance with a result from the determination means.
Claims2
A projection image display apparatus comprising:
- a main projector apparatus body;
- a projection element;
- a light source unit configured to be connected to a main board of said main projector apparatus body by a light source connector when a guidance mechanism inserts said light source unit into said main projector apparatus body, wherein the light source unit has a normal operative setting;
- a storage unit, disposed in a vicinity of the light source connector and configured to be connected to the main projector apparatus body by a storage unit connector when the guidance mechanism inserts said light source unit into said main projector apparatus body, for storing therein information to authenticate that said light source unit is genuine, wherein the storage unit is a non-general purpose storage;
- a determination unit communicatively connected to said storage unit in response to said light source unit being attached to said main projector apparatus body of the apparatus for communicating with said storage unit using said information to authenticate said light source unit;
- a light source control unit operative in accordance with the authentication of said light source unit;
- and
- an OSD device for displaying on a screen a determination of said determination unit;
- wherein
- when said determination unit fails to authenticate said light source unit, said light source control unit decreases said output of said light source unit to below the normal operative setting within the range where a user can use said light source unit and
- when said determination unit fails to authenticate, said OSD device operates to display on said screen that said light source unit is a non-genuine product.
8 more elements
Dependencies are inferred from the claim text.