US 12,003,898 B2Granted

Projector and projection method

AssigneeCoretronic Corporation

InventorsChun-Chieh Wang, Fan-Chieh Chang

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Abstract

A projector and a projection method are provided. The projector includes a control device, a projection optical engine, a distance sensing device, and an image capturing device. The projection optical engine projects a first projection image to a projection surface according to first image data. The distance sensing device senses multiple distance parameters of a projection area. The image capturing device captures the first projection image to obtain a first captured image. The control device performs a keystone correction operation and a leveling correction operation on the first image data. The projection optical engine projects a second projection image to the projection surface according to the corrected first image data. The control device obtains a second captured image including the second projection image through the image capturing device, and analyzes the second captured image to project current projection image size information in the second projection image.

Claims20

Dependent claims

A projector, comprising:

a control device, configured to output first image data;
a projection optical engine, coupled to the control device, configured to receive the first image data to project a first projection image to a projection surface according to the first image data;
a distance sensing device, coupled to the control device, configured to sense a plurality of distance parameters of a projection area, wherein the first projection image is displayed in the projection area;
and
an image capturing device, coupled to the control device, configured to capture the first projection image to obtain a first captured image,
wherein the control device is configured to perform at least one of a keystone correction operation and a leveling correction operation on the first image data according to at least one of the distance parameters and the first captured image, and the projection optical engine projects a second projection image to the projection surface according to corrected first image data,
wherein the control device obtains a second captured image comprising the second projection image through the image capturing device, and analyzes the second captured image to project current projection image size information in the second projection image.

4 more elements

A projection method, comprising:

outputting first image data by a control device;
receiving the first image data by a projection optical engine, so as to project a first projection image to a projection surface according to the first image data;
sensing a plurality of distance parameters of a projection area by a distance sensing device, wherein the first projection image is displayed in the projection area;
capturing the first projection image to obtain a first captured image by an image capturing device;
performing at least one of a keystone correction operation and a leveling correction operation on the first image data by the control device according to at least one of the plurality of distance parameters and the first captured image;
projecting a second projection image to the projection surface by the projection optical engine according to corrected first image data;
and
obtaining a second captured image comprising the second projection image by the image capturing device, and analyzing the second captured image by the control device to project current projection image size information in the second projection image.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/954,328Filed 28 Sep 2022
Priority: CN 202111149544.029 Sep 2021
Published: US 2023/0102878 A130 Mar 2023
Granted: 4 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

H04N 9/3185
Video signal processing therefor: geometric adjustment, e.g. keystone or convergence
G01S 7/4865
Receivers: time delay measurement, e.g. time-of-flight measurement, time of arrival measurement or determining the exact position of a peak
G01S 7/4915
Receivers: time delay measurement, e.g. operational details for pixel components ; Phase measurement
G01S 17/08
Systems determining position data of a target: for measuring distance only

Family

US 2023/0102878 A1Pre-grant publication · published 30 Mar 2023
US 12,003,898 B2This patent

From the US filing history. Foreign family members aren’t listed.

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