Projection device and keystone correction method thereof

A technology of projection device and trapezoidal correction, which is applied in the direction of using projection device image reproducer, TV, color TV parts, etc., which can solve the problems of user inconvenience and affect user experience

Inactive Publication Date: 2017-11-07
QISDA OPTRONICS (SUZHOU) CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In small home theaters, the projection device is often installed in a fixed position, such as hanging above the center of the theater, so if the user does not manually correct, when the viewer is not in the position facing the screen, The image seen by the viewer will be trapezoidally deformed, so in order to prevent the image seen by the viewer from being trapezoidal, the viewer can only sit near the optical axis of the projection device, which will cause inconvenience to the user and affect the user experience

Method used

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  • Projection device and keystone correction method thereof
  • Projection device and keystone correction method thereof
  • Projection device and keystone correction method thereof

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Embodiment Construction

[0034] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

[0035] refer to Figure 1 to Figure 3 , discloses the projection device provided by the present invention. refer to figure 1 As shown, is a functional block diagram of the projection device provided by the embodiment of the present invention. The projection device 1 of the present invention has a detection module 11 , an image capture device 12 , a processing module 13 and an image correction unit 14 . The detection module 11 , the image capture device 12 and the image correction unit 14 are coupled to the processing module 13 . The specific functions of the projection device 1 will be described below. In addition, for the convenience of description, a space with two mutually perpendicular X-axes, Y-axes and Z-axes is defined, the optical axis C of the projection d...

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Abstract

The invention discloses a projection device and a trapezoidal correction method thereof. The projection device includes a detection module, an image capture device, a processing module and an image correction unit. The detection module is used to obtain the first plane where the target object is located and the projection The first distance of the device and the installation position of the projection device, the image capture device is used to identify and track the target object, and acquire an image with the target object when the target object is in a stable state, and the processing module is used to store the target object The first distance and the installation position, and analyzing the image, the image correction unit is used to perform trapezoidal correction on the picture, wherein the processing module obtains the target object and the optical axis according to the first distance, the installation position and the image The second distance of the second plane where the optical axis is located and the third distance from the third plane where the optical axis is located, and the corresponding correction value is obtained according to the second distance and the third distance, and then the picture is processed according to the correction value Keystone correction.

Description

technical field [0001] The present invention relates to a projection device and its trapezoidal correction method, in particular to a projection device for performing trapezoidal correction by identifying the position of a human face and its trapezoidal correction method. Background technique [0002] In recent years, projection devices that project images on a screen have been rapidly popularized. Since projection devices are generally designed on the premise that they are installed facing the screen, when the viewer is not in a position facing the screen, , the image seen by the viewer will undergo trapezoidal deformation. [0003] At present, the automatic keystone correction of the projection device is realized by detecting the relationship between the optical axis of the projection device and the projection surface, such as distance and angle. In small home theaters, the projection device is often installed in a fixed position, such as hanging above the center of the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/74H04N9/31
Inventor 吴柔萱
Owner QISDA OPTRONICS (SUZHOU) CO LTD
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