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US 10,133,167 B2Granted
Projection apparatus and light source module
AssigneeCoretronic Corporation
InventorJian-Jiun Wu
Life of this patent
Estimating the term…
Abstract
A projection apparatus and a light source module are provided. The light source module includes a light-emitting element string, a shunt module, and a control circuit. A first shunt circuit, a second shunt circuit, and a third shunt circuit of the shunt module are coupled to the light-emitting element string, and are adapted to provide a first shunt path, a second shunt path or a third shunt path, such that the light-emitting element string is still maintained to normally work when a light-emitting element/light-emitting elements is/are malfunctioned.
Claims12
A projection apparatus, comprising:
- a light source module, adapted to provide an illumination beam, and comprising:
- a light-emitting element string, having a first light-emitting portion, a second light-emitting portion, and a third light-emitting portion, wherein the first light-emitting portion, the second light-emitting portion, and the third light-emitting portion comprise a plurality of light-emitting elements connected in series;
- a shunt module, coupled to the light-emitting element string, and comprising:
- a first shunt circuit, connected in parallel with the first light-emitting portion to form a pair of first connection nodes on the light-emitting element string, and adapted to provide a first shunt path;
- a second shunt circuit, connected in parallel with the second light-emitting portion to form a pair of second connection nodes on the light-emitting element string, and adapted to provide a second shunt path;
- and
- a third shunt circuit, connected in parallel with the third light-emitting portion to form a pair of third connection nodes on the light-emitting element string, and adapted to provide a third shunt path, wherein at least one light-emitting element between the pair of the first connection nodes, at least one light-emitting element between the pair of the second connection nodes, and at least one light-emitting element between the pair of the third connection nodes are not completely the same;
- and
- a control circuit, coupled to the light-emitting element string, the first shunt circuit, the second shunt circuit, and the third shunt circuit, and adapted to control the first shunt circuit, the second shunt circuit or the third shunt circuit to provide the first shunt path, the second shunt path or the third shunt path according to an output current of the light-emitting element string, wherein the light-emitting element string is adapted to provide the illumination beam through the first shunt path, the second shunt path or the third shunt path;
- a light valve, located on a transmission path of the illumination beam, and adapted to convert the illumination beam into an image beam;
- and
- a projection lens, located on a transmission path of the image beam.
9 more elements
A light source module, comprising:
- a light-emitting element string, having a first light-emitting portion, a second light-emitting portion, and a third light-emitting portion, wherein the first light-emitting portion, the second light-emitting portion, and the third light-emitting portion comprise a plurality of light-emitting elements connected in series;
- a shunt module, coupled to the light-emitting element string, and comprising:
- a first shunt circuit, connected in parallel with the first light-emitting portion to form a pair of first connection nodes on the light-emitting element string, and adapted to provide a first shunt path;
- a second shunt circuit, connected in parallel with the second light-emitting portion to form a pair of second connection nodes on the light-emitting element string, and adapted to provide a second shunt path;
- and
- a third shunt circuit, connected in parallel with the third light-emitting portion to form a pair of third connection nodes on the light-emitting element string, and adapted to provide a third shunt path, wherein at least one light-emitting element between the pair of the first connection nodes, at least one light-emitting element between the pair of the second connection nodes, and at least one light-emitting element between the pair of the third connection nodes are not completely the same;
- and
- a control circuit, coupled to the light-emitting element string, the first shunt circuit, the second shunt circuit, and the third shunt circuit, and adapted to control the first shunt circuit, the second shunt circuit or the third shunt circuit to provide the first shunt path, the second shunt path or the third shunt path according to an output current of the light-emitting element string.
5 more elements
Dependencies are inferred from the claim text.