Projector thermal out-of-focus judgment method and projector

Abstract

The invention discloses a projector thermal out-of-focus judgment method. The method comprises the following steps: adjusting a focal length to make a projection picture clear; acquiring a clear projection picture as a first reference picture in a camera space; obtaining a pixel range value and / or a vertex coordinate value of the first reference picture as a first standard state value; triggeringphotographing regularly, and acquiring a first to-be-judged projection picture in a camera space; obtaining a pixel range value and / or a vertex coordinate value of a first to-be-judged projection picture in a camera space, and calculating the offset of the pixel range value and / or the vertex coordinate value of the first to-be-judged projection picture relative to the first standard state value, if the offset exceeds a preset value, judging that thermal defocusing occurs, and otherwise, carrying out the step of triggering photographing at regular time to obtain the first to-be-judged projection picture in a camera space. According to the invention, extra components are not needed, and the motor is not moved in the process of judging whether hot focus shifting occurs or not, so that the viewing effect is not influenced, and the user experience is high.

Description

Technical field

[0001] The invention relates to the field of projection systems, in particular to a method for judging thermal run-out of a projector and a projector. Background technique

[0002] Projector, also known as projector, is a device that can project images or videos onto the screen. It can be connected to computers, DVs, etc. through different interfaces to play corresponding video signals. Projectors are currently widely used in homes, offices, Schools and entertainment venues have different types of CRT, LCD, DLP, etc. according to different working methods.

[0003] The phenomenon of hot out-of-focus (hot out of focus) generally occurs in projection appliances. Before the hot out-of-focus compensation, it is necessary to use some technical means to determine whether or not hot out of focus occurs. There are two main ways to judge: one way is The temperature change of the optical part of the projector is judged by thermal sensing components, and it can be intuitively...

Examples

Embodiment 1

[0041] Such as figure 1 As shown, this embodiment provides a method for judging thermal run-out of a projector, which is applied to a projection device with a camera, and includes:

[0042] S1: Adjust the focus to make the projection picture clear;

[0043] S2: Obtain a clear projection picture in the camera space as the first reference picture;

[0044] S3: Obtain the pixel range value and / or the vertex coordinate value of the first reference picture as the first standard state value;

[0045] S4: Trigger taking pictures at regular intervals, and obtain the first to-be-judged projection image in the camera space;

[0046] S5: Obtain the pixel range value and / or vertex coordinate value of the first projection screen to be determined in the camera space, and calculate the pixel range value and / or vertex coordinate value of the first projection screen to be determined relative to the first The offset of the standard state value. If the offset exceeds the preset value, it is judged that a...

Embodiment 2

[0067] Such as figure 2 As shown, this embodiment provides a projector that can use the method provided in Embodiment 1 to determine whether a thermal runaway occurs, including:

[0068] Camera: used to capture the projection screen on the projection surface;

[0069] Focusing unit: used to adjust the focal length of the projector, and also used to adjust the focal length of the projector according to the judgment result of the first judgment unit;

[0070] Analysis unit: It is used to analyze whether the projection picture after the focusing unit adjusts the focus of the projector is clear;

[0071] Calculation unit: used to calculate the pixel range value and / or vertex coordinate value of the acquired projection screen, also used to calculate the pixel range value offset between the projection screens, and also used to calculate the vertex coordinate value between the projection screens Offset;

[0072] Storage unit: used to store the calculation result of the first calculation uni...

Technical field

[0001] The invention relates to the field of projection systems, in particular to a method for judging thermal run-out of a projector and a projector. Background technique

[0002] Projector, also known as projector, is a device that can project images or videos onto the screen. It can be connected to computers, DVs, etc. through different interfaces to play corresponding video signals. Projectors are currently widely used in homes, offices, Schools and entertainment venues have different types of CRT, LCD, DLP, etc. according to different working methods.

[0003] The phenomenon of hot out-of-focus (hot out of focus) generally occurs in projection appliances. Before the hot out-of-focus compensation, it is necessary to use some technical means to determine whether or not hot out of focus occurs. There are two main ways to judge: one way is The temperature change of the optical part of the projector is judged by thermal sensing components, and it can be intuitively...

Examples

Embodiment 1

[0041] Such as figure 1 As shown, this embodiment provides a method for judging thermal run-out of a projector, which is applied to a projection device with a camera, and includes:

[0042] S1: Adjust the focus to make the projection picture clear;

[0043] S2: Obtain a clear projection picture in the camera space as the first reference picture;

[0044] S3: Obtain the pixel range value and / or the vertex coordinate value of the first reference picture as the first standard state value;

[0045] S4: Trigger taking pictures at regular intervals, and obtain the first to-be-judged projection image in the camera space;

[0046] S5: Obtain the pixel range value and / or vertex coordinate value of the first projection screen to be determined in the camera space, and calculate the pixel range value and / or vertex coordinate value of the first projection screen to be determined relative to the first The offset of the standard state value. If the offset exceeds the preset value, it is judged that a...

Embodiment 2

[0067] Such as figure 2 As shown, this embodiment provides a projector that can use the method provided in Embodiment 1 to determine whether a thermal runaway occurs, including:

[0068] Camera: used to capture the projection screen on the projection surface;

[0069] Focusing unit: used to adjust the focal length of the projector, and also used to adjust the focal length of the projector according to the judgment result of the first judgment unit;

[0070] Analysis unit: It is used to analyze whether the projection picture after the focusing unit adjusts the focus of the projector is clear;

[0071] Calculation unit: used to calculate the pixel range value and / or vertex coordinate value of the acquired projection screen, also used to calculate the pixel range value offset between the projection screens, and also used to calculate the vertex coordinate value between the projection screens Offset;

[0072] Storage unit: used to store the calculation result of the first calculation uni...

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