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CN-122002012-A - Projection equipment and curtain entering correction method

CN122002012ACN 122002012 ACN122002012 ACN 122002012ACN-122002012-A

Abstract

The application provides a projection device and an incoming screen correction method. When the projection equipment executes the automatic correction function, a first switch state of a switch for automatically entering a curtain is obtained, so that whether a projection area contains the curtain or not is detected under the condition that the switch for automatically entering the curtain is started, and then a subsequent automatic correction strategy is determined according to the existence condition of the curtain. Therefore, when the curtain is not arranged in the projection environment, the automatic correction time is saved, and the automatic correction efficiency is improved. When a curtain exists in the projection environment, the projection information of the light emitting component can be corrected according to the correction process corresponding to the automatic curtain entering, so that the projection quality of the light emitting component is ensured.

Inventors

  • ZHENG QINGQING

Assignees

  • 海信视像科技股份有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (10)

  1. 1.A projection device, comprising: A light emitting assembly configured to project projected content onto a projection surface; A camera configured to capture a sampled image; A controller configured to: Acquiring a first switch state of an automatic curtain-entering switch when the automatic correction function is executed, wherein the first switch state is used for representing the running state of the automatic curtain-entering function; If the first switch state characterizes that the automatic curtain entering function is started, detecting whether a projection area contains a curtain or not; If the curtain exists in the projection area, adjusting the projection information of the light emitting component according to a curtain entering algorithm associated with the automatic curtain entering function, so that the light emitting component projects the projection content to the curtain according to the adjusted projection information; And if the curtain does not exist in the projection area, determining an automatic correction strategy according to a second switch state of the obstacle avoidance switch so as to adjust the projection information of the light emitting component based on the automatic correction strategy.
  2. 2. The projection device of claim 1, wherein the controller, when performing the auto-correction function, is further configured to: acquiring a second switch state of the obstacle avoidance switch; If the curtain does not exist in the projection area and the second switch state represents that the obstacle avoidance function is started, the projection information of the light emitting component is adjusted according to an obstacle avoidance algorithm associated with the obstacle avoidance function, so that the light emitting component projects the projection content to the projection surface according to the adjusted projection information; And if the curtain does not exist in the projection area and the second switch state represents that the obstacle avoidance function is closed, generating prompt information.
  3. 3. The projection device of claim 2, wherein the controller, when performing the auto-correction function, is further configured to: If the first switch state represents that the automatic curtain entering function is closed and the second switch state represents that the obstacle avoidance function is started, the projection information of the light emitting component is adjusted according to an obstacle avoidance algorithm associated with the obstacle avoidance function, so that the light emitting component projects the projection content to the projection surface according to the projection information; And if the first switch state represents that the automatic curtain entering function is closed and the second switch state represents that the obstacle avoidance function is closed, performing noninductive correction on the projection content projected to the projection surface by the light emitting component.
  4. 4. The projection device of claim 1, further comprising a gyroscopic sensor; The gyroscope sensor is configured to collect displacement signals of the projection device and send movement prompt information to the controller when the projection device moves; The controller, prior to performing the auto-correction function, is further configured to: Responding to the received movement prompt information sent by the gyroscope sensor, and executing noninductive correction on the projection content projected to the projection surface by the light emitting component; the automatic correction function is performed when the projection apparatus stops moving.
  5. 5. The projection device of claim 1, wherein the controller, when the curtain is present in the projection area, performs adjusting the projection information of the light exit assembly according to a curtain entry algorithm associated with the curtain entry function, configured to: transmitting a first graphic card projection signal to the light-emitting component so that the light-emitting component projects a first graphic card to the curtain; sending a first acquisition signal to the camera so that the camera acquires first image data to obtain a first shooting image card; and calculating a world coordinate conversion matrix based on the corresponding point pairs between the first shooting image card and the first image card projected on the curtain.
  6. 6. The projection device of claim 5, wherein the light exit assembly has a first graphics card embedded therein, the first graphics card having a vertex in an opto-mechanical coordinate system as a first vertex coordinate, wherein the controller is configured to adjust the projection information of the light exit assembly according to a curtain entry algorithm associated with the curtain entry function when the curtain exists in the projection area, and wherein the controller is configured to: Calculating a first homography matrix according to preset point pairs, wherein the first homography matrix is used for representing the association relation between an optical machine coordinate system of the light emitting component and a camera coordinate system of the camera; calculating a second vertex coordinate according to the first vertex coordinate and the first homography matrix, wherein the second vertex coordinate is used for representing the coordinate of a corresponding point of the first vertex in the first shooting picture card; calculating an optical zoom ratio based on a first angular point coordinate and the second angular point coordinate determined in the first shooting image card, so as to adjust the lens focal length of the light emitting component based on the optical zoom ratio; Sending a second acquisition signal to the camera so that the camera acquires second image data to obtain a second shooting image card; and calculating a third vertex coordinate based on a second angular point coordinate determined in the second shooting picture card and a second homography matrix, wherein the second homography matrix is used for representing the association relation between the camera coordinate system and the optical-mechanical coordinate system of the light emitting component for adjusting the focal length of the lens.
  7. 7. The projection device of claim 6, wherein the controller is further configured to: Calculating fourth vertex coordinates corresponding to the third vertex coordinates on the curtain according to the third vertex coordinates and the world coordinate conversion matrix; obtaining a projection coordinate range of the light emitting component; If the fourth vertex coordinate is out of the projection coordinate range, acquiring a second switch state of the obstacle avoidance switch; and if the fourth vertex coordinate is within the projection coordinate range, sending a second graphic card projection signal to the light emitting assembly so that the light emitting assembly projects a second graphic card to the curtain.
  8. 8. The projection device of claim 6, wherein the controller is configured to send a second graphics card projection signal to the light extraction assembly, and further configured to: sending a second acquisition signal to the camera so that the camera acquires third image data to obtain a third shooting image card; Intercepting corner image data based on the second corner coordinates, and inputting the corner image data into a corner detection model to obtain third corner coordinates; Determining a first error distance and an error direction according to the third corner coordinates and the second corner coordinates; And performing digital zooming based on the first error distance and the error direction, and controlling the light emitting component to project projection content to the curtain after performing digital zooming.
  9. 9. The projection device of claim 8, wherein the controller performs digital zooming based on the error distance and the error direction to obtain a fifth vertex coordinate, further configured to: acquiring a second error distance generated after digital zooming is performed; if the second error distance is smaller than an error threshold value, stopping executing the step of executing digital zooming based on the second error distance and the error direction; if the second error distance is greater than or equal to an error threshold, continuing to execute the step of executing digital zooming based on the second error distance and the error direction; and stopping executing the digital zooming based on the second error distance and the error direction when the execution times of executing the digital zooming based on the second error distance and the error direction are larger than an execution threshold value.
  10. 10. A curtain entry correction method, comprising: Acquiring a first switch state of an automatic curtain-entering switch when the automatic correction function is executed, wherein the first switch state is used for representing the running state of the automatic curtain-entering function; If the first switch state characterizes that the automatic curtain entering function is started, detecting whether a projection area contains a curtain or not; If the curtain exists in the projection area, adjusting projection information of a light emitting component according to a curtain entering algorithm associated with the automatic curtain entering function, so that the light emitting component projects the projection content to the curtain according to the projection information; And if the curtain does not exist in the projection area, determining an automatic correction strategy according to a second switch state of the obstacle avoidance switch so as to adjust the projection information of the light emitting component based on the automatic correction strategy.

Description

Projection equipment and curtain entering correction method Technical Field The present application relates to the field of projection devices, and in particular, to a projection device and an in-screen correction method. Background When projecting content using a projection device, a curtain may typically be installed in the projection area. The characteristics of the curtain are more suitable for receiving projection content, and further the watching experience of a user is improved. The projection device is moved during the start-up process or during the operation process, and the projection information needs to be corrected to ensure that the projection content can be completely and stably projected on the curtain. That is, when the projection content is shifted due to the movement of the projection device, the projection device can control the light emitting component to adjust projection angle, projection coordinates and other projection information so as to ensure projection quality. In the automatic correction process, the projection device can be used for projecting the image card for multiple times and shooting the image card so as to correct the projection information of the light emitting component according to the corresponding coordinates in the image card. However, this method is performed in a large number of steps, and does not distinguish the environments of the projection area in detail, resulting in low automatic correction efficiency. Disclosure of Invention The application provides a projection device and a curtain entering correction method, which are used for solving the problem of low automatic correction efficiency of the projection device. In a first aspect, the present application provides a projection device comprising a light-emitting assembly configured to project projection content onto a projection surface, a camera configured to capture a sampled image, and a controller configured to: And when the automatic correction function is executed, acquiring a first switch state of the automatic curtain-entering switch, wherein the first switch state is used for representing the running state of the automatic curtain-entering function. If the first switch state is used for representing that the automatic curtain entering function is started, whether a curtain is contained in the projection area or not is detected. And if the curtain exists in the projection area, adjusting the projection information of the light emitting component according to a curtain entering algorithm associated with the curtain entering function, so that the light emitting component projects the projection content to the curtain according to the projection information. And if the curtain does not exist in the projection area, determining an automatic correction strategy according to a second switch state of the obstacle avoidance switch so as to adjust the projection information of the light emitting component based on the automatic correction strategy. Through addding the curtain detection link, can improve projection equipment to the judgement ability of projection environment, and then whether contain the curtain in the projection environment, carry out corresponding automatic correction step, be favorable to promoting projection equipment automatic correction's overall efficiency. In some possible embodiments, the controller, when performing the auto-correction function, is further configured to: and acquiring a second switch state of the obstacle avoidance switch. And if the curtain does not exist in the projection area and the second switch state is used for representing the start of the obstacle avoidance function, adjusting the projection information of the light emitting component according to an obstacle avoidance algorithm associated with the obstacle avoidance function so that the light emitting component projects the projection content to the projection surface according to the adjusted projection information. And if the curtain does not exist in the projection area and the second switch state is used for representing that the obstacle avoidance function is closed, generating the prompt information. The state of the obstacle avoidance switch is obtained to determine whether to execute an obstacle avoidance strategy in the automatic correction process, and the automatic correction process can be perfected by combining a curtain entering algorithm and an obstacle avoidance algorithm so as to adapt to various projection environments. In some possible embodiments, the controller, when performing the auto-correction function, is further configured to: and if the first switch state is used for representing that the automatic curtain entering function is closed and the second switch state is used for representing that the obstacle avoidance function is started, adjusting the projection information of the light emitting component according to an obstacle avoidance algorithm associated with the obstacle avo