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US 12,120,470 B2Granted
Projection system and calibration method thereof
AssigneeDelta Electronics, Inc.
InventorKai-Ming Liu
Life of this patent
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Abstract
A projection system includes a light source module, an image device, a first light sensor, a second light sensor, and a processor. The light source module has at least one solid-state light-emitting device. The processor is communicatively coupled to the light source module, the first light sensor, and the second light sensor and is configured to execute a calibration procedure.
Claims17
A projection system, comprising:
- a light source module having at least one solid-state light-emitting device;
- an image device;
- a first light sensor;
- a second light sensor;
- and
- a processor communicatively coupled to the light source module, the first light sensor, and the second light sensor, and configured to execute a calibration procedure, wherein the calibration procedure comprises:
- driving the at least one solid-state light-emitting device to generate a plurality of output powers according to a plurality of light source control signals, to sequentially emit a plurality of white lights, and to sequentially project a plurality of full white patterns on a screen through the image device;
- driving the first light sensor to sequentially sense the plurality of white lights and correspondingly generate a first color information;
- driving the second light sensor to sequentially sense the plurality of full white patterns and correspondingly generate a second color information;
- obtaining a corresponding relationship between the first color information and the second color information;
- obtaining a target color information of the second color information according to a color space coordinate in the second color information;
- obtaining a target color information of the first color information according to the target color information of the second color information and the corresponding relationship;
- and
- calibrating the light source control signals corresponding to the plurality of output powers according to the target color information of the first color information.
11 more elements
A calibration method of a projection system, comprising:
- driving at least one solid-state light-emitting device to generate a plurality of output powers according to a plurality of light source control signals, to sequentially emit a plurality of white lights, and to sequentially project a plurality of full white patterns on a screen through an image device;
- driving a first light sensor to sequentially sense the plurality of white lights and correspondingly generate a first color information;
- driving a second light sensor to sequentially sense the plurality of full white patterns and correspondingly generate a second color information;
- obtaining a corresponding relationship between the first color information and the second color information;
- obtaining a target color information of the second color information according to a color space coordinate in the second color information;
- obtaining a target color information of the first color information according to the target color information of the second color information and the corresponding relationship;
- and
- calibrating the light source control signals corresponding to the plurality of output powers according to the target color information of the first color information.
5 more elements
Dependencies are inferred from the claim text.