Projector control method, device, projector, and storage medium

Abstract

The present invention discloses a control method, device, projector, and storage medium for a projector. The control method comprises: determining a projection area of ​​the target object on the projection plane when it is determined that there is a target object in the projection space of the projector; determining a target area in the image display element corresponding to the projection area; and adjusting light source information of a light-emitting element that provides a projection light source for the target area. When it is determined that there is a target object in the projection space of the projector, the light source information of all or part of the light-emitting elements can be adjusted based on the target object, so that the projection light source of the projector adapts to the current scene and improves the user experience.

Description

Technical Field

[0001] The invention relates to a control method and device of a projector, a projector and a storage medium. Background Art

[0002] Projection equipment is one of the most important display devices currently. It is a projection device used to magnify and display images. The projector irradiates light onto the image display element to produce an image, and then projects it through the lens. Current projection equipment uses high-brightness lamps as projection light sources, irradiating image display elements indiscriminately. The projection light source cannot be adjusted according to the projection scene, resulting in a poor user experience. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defect that the projection light source of the projector in the prior art cannot be adjusted according to the projection scene, and to provide a control method, device, projector and storage medium of the projector.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] In a first aspect, a control method for a projector is provided, wherein the projector comprises an image display element and a plurality of light emitting elements, wherein each light emitting element is used to provide a projection light source for a different area of ​​the image display element, so as to project display content of the image display element onto a projection plane;

[0006] The control method comprises:

[0007] In the case where it is determined that a target object exists in the projection space of the projector, determining a projection area of ​​the target object on the projection plane;

[0008] determining a target area in the image display element corresponding to the projection area;

[0009] The light source information of the light emitting element that provides the projection light source for the target area is adjusted.

[0010] Optionally, the projector further includes a camera; and the control method further includes:

[0011] Acquire an image obtained by photographing the projection space by the camera;

[0012] The image is subjected to image recognition processing to determine whether a target object exists in the projection space of the projector.

[0013] Optionally, performing image recognition processing on the image includes:

[0014] The image is input into a pre-trained image recognition model to determine whether a target object exists in the projection space of the projector according to an output result of the image recognition model.

[0015] Optionally, the projector further includes an infrared sensor; and the control method further includes:

[0016] Acquiring an infrared radiation signal in the projection space detected by the infrared sensor;

[0017] It is determined whether a target object exists in the projection space of the projector according to the infrared radiation signal.

[0018] Optionally, the light source information includes brightness;

[0019] Adjusting light source information of a light emitting element that provides a projection light source for the target area includes:

[0020] When the target object is a human face, the brightness of the light emitting element providing the projection light source for the target area is reduced.

[0021] Optionally, adjusting light source information of a light emitting element that provides a projection light source for the target area includes:

[0022] Determine a target adjustment strategy that matches the type of the target object according to a mapping relationship between the object type and the adjustment strategy;

[0023] According to the target adjustment strategy, light source information of the light emitting element that provides projection light source for the target area is adjusted.

[0024] Second, a control device for a projector is provided, wherein the projector comprises an image display element and a plurality of light emitting elements, each light emitting element being used to provide a projection light source for a different area of ​​the image display element, so as to project the display content of the image display element onto a projection plane;

[0025] The control device comprises:

[0026] A first determination module, configured to determine a projection area of ​​the target object on the projection plane when it is determined that there is a target object in the projection space of the projector;

[0027] A second determining module, configured to determine a target area in the image display element corresponding to the projection area;

[0028] The adjustment module is used to adjust the light source information of the light emitting element that provides the projection light source for the target area.

[0029] Optionally, the projector further includes a camera; and the control device further includes:

[0030] An acquisition module, used to acquire an image obtained by the camera shooting the projection space;

[0031] The recognition module is used to perform image recognition processing on the image to determine whether a target object exists in the projection space of the projector.

[0032] Optionally, the projector further includes an infrared sensor; and the control device further includes:

[0033] An acquisition module, used for acquiring the infrared radiation signal in the projection space detected by the infrared sensor;

[0034] The identification module is used to determine whether there is a target object in the projection space of the projector according to the infrared radiation signal.

[0035] Optionally, the light source information includes brightness;

[0036] The adjustment module is specifically used for:

[0037] When the target object is a human face, the brightness of the light emitting element providing the projection light source for the target area is reduced.

[0038] Optionally, the adjustment module includes:

[0039] A determination unit, configured to determine a target adjustment strategy that matches the type of the target object according to a mapping relationship between the object type and the adjustment strategy;

[0040] An adjustment unit is used to adjust the light source information of the light-emitting element that provides the projection light source for the target area according to the target adjustment strategy.

[0041] In a third aspect, a projector is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-described projector control methods when executing the computer program.

[0042] In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the control method of the projector described in any one of the above items is implemented.

[0043] The positive progressive effect of the present invention is that in the embodiment of the present invention, multiple light-emitting elements are used to provide projection light sources for the image display element, and each light-emitting element can be independently controlled. Therefore, when it is determined that there is a target object in the projection space of the projector, the light source information of all or part of the light-emitting elements can be adjusted based on the target object to make the projection light source of the projector adapt to the current scene and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1a A partial structural schematic diagram of a projector provided by an exemplary embodiment of the present invention.

[0045] Figure 1b A schematic diagram of a usage scenario of a projector provided by an exemplary embodiment of the present invention.

[0046] Figure 2 The present invention provides a flowchart of a method for controlling a projector according to an exemplary embodiment of the present invention.

[0047] Figure 3 A schematic diagram of an image of a projection space obtained during a control process of a projector provided by an exemplary embodiment of the present invention.

[0048] Figure 4 A module schematic diagram of a control device for a projector provided by an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0049] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0050] The embodiment of the present invention provides a control method for a projector, which can adjust the light source information of all or part of the light emitting elements of the projector according to the current usage scenario. Figure 1a and Figure 1b The projector 1 includes an image display element 12 and a plurality of light emitting elements 11, each light emitting element 11 is used to provide a projection light source 13 for different areas of the image display element 12, so as to project the display content of the image display element 12 onto the projection plane 2. Of course, the projector may also include other components such as a housing, a lens, a lens group, a polarization conversion element, etc., which will not be described in detail here.

[0051] The number of light emitting elements can be set according to actual conditions, and is not limited to the 16 shown in the figure, and can be more or less. The arrangement of multiple light emitting elements is not limited to the arrangement in a matrix array as shown in the figure, and multiple light emitting elements can also be arranged in a circular array, for example. The light emitting element can be implemented by LED (light emitting diode), and multiple LEDs form an LED array.

[0052] In one embodiment, the image display element can be divided into multiple areas, and the corresponding relationship between the light-emitting element and each area of ​​the image display element is configured so that each light-emitting element provides a projection light source for the corresponding area of ​​the image display element. The light-emitting element and the area of ​​the graphic display element can be in a one-to-one relationship, that is, one light-emitting element provides a projection light source for one area of ​​the graphic display element; the light-emitting element and the area of ​​the graphic display element can be in a one-to-many relationship, that is, one light-emitting element can provide a projection light source for multiple areas of the graphic display element; the light-emitting element and the area of ​​the graphic display element can be in a many-to-one relationship, that is, multiple light-emitting elements simultaneously provide a projection light source for one area of ​​the graphic display element.

[0053] Combine the following Figure 1a and Figure 1b , introduces the control process of the projector.

[0054] Figure 2 A flowchart of a method for controlling a projector provided by an exemplary embodiment of the present invention, the method comprising the following steps:

[0055] Step 201: When it is determined that there is a target object in the projection space of the projector, a projection area of ​​the target object on the projection plane is determined.

[0056] The target object may be, for example, a human face, a laser pointer, etc.

[0057] The projection space of the projector is the space of the light beam formed by the projection light source passing through the lens of the projector. Figure 1b ,The space surrounded by dotted lines in the figure represents the projection space of the projector.

[0058] In one embodiment, it is determined whether the target object exists in the projection space of the projector by image recognition technology. Specifically, an image is obtained by capturing the projection space with a camera provided on the projector, and image recognition is performed on the image to determine whether the target object exists in the projection area of ​​the projector. When the target object is a human face, a face recognition algorithm can be used to determine whether the human face exists in the projection area of ​​the projector.

[0059] In one embodiment, the image is recognized by using a pre-trained image recognition model. Specifically, the image captured by the camera is input into the pre-trained image recognition model, and the output result of the image recognition model is used to determine whether there is a target object in the projection area of ​​the projector. The image recognition model is trained based on image samples marked with target object information. The training process of the model can be found in the description of the relevant technology, and the present invention does not specifically limit this.

[0060] In one embodiment, an infrared sensor is used to determine whether a target object exists in the projection space of the projector. Different objects have different infrared absorption spectra. By acquiring an infrared radiation signal in the projection area detected by the infrared sensor and analyzing the infrared radiation signal, it can be determined whether a target object exists in the projection area of ​​the projector. If the spectrum of the infrared radiation signal matches the spectrum of the target object, it is determined that the target object exists in the projection area of ​​the projector; if the spectrum of the infrared radiation signal does not match the spectrum of the target object, it is determined that the target object does not exist in the projection area of ​​the projector.

[0061] If it is determined that there is a target object in the projection space of the projector, it means that there is a need to adjust the light emitting element in the current use scenario of the projector, and then a projection area of ​​the target object on the projection plane is determined.

[0062] In one embodiment, the projection area of ​​the target object on the projection plane can be determined by performing image recognition on the image obtained by shooting the projection space. Figure 3 It is an image obtained by photographing the projection space. The image content includes the projection plane 2' and the target object (the area surrounded by dots and lines in the figure). The area where the target object is located is identified by image recognition technology. Combined with geometric principles, the projection area of ​​the target object on the projection plane can be determined.

[0063] The display content on the projection plane is obtained by enlarging and projecting the display content of the image display element, and the display content on the projection plane corresponds to the display content of the image display element. Assume that the image display element is divided into 9 areas, see Figure 3 , which is equivalent to dividing the projection plane into 9 areas. The projection area of ​​the target object on the projection plane is the area of ​​the 2nd row and 1st column and the 3rd row and 1st column in the projection plane.

[0064] Step 202: Determine a target area in the image display element that corresponds to the projection area.

[0065] The purpose of determining the projection area of ​​the target object on the projection plane is to determine the light-emitting element that needs to be adjusted. The image displayed on the projection plane corresponds to the image displayed by the image display element, and there is a corresponding relationship between the area of ​​the image display element and the light-emitting element. Therefore, according to the position information of the projection area on the projection plane, the target area corresponding to the image display element can be determined, and then the light-emitting element that provides the projection light source for the target area can be determined.

[0066] For example, if the image display element is divided into 9 areas, correspondingly, there are also 9 areas on the projection plane. If the projection area of ​​the target object on the projection plane is determined to be the area of ​​the 2nd row and 1st column and the area of ​​the 3rd row and 1st column on the projection plane, then the area of ​​the 2nd row and 1st column and the area of ​​the 3rd row and 1st column on the image display element are determined as the target area, and the light-emitting element that provides projection light source for the target area is the light-emitting element that needs to adjust the light source information.

[0067] Based on the imaging principle, when the distance between the camera and the projection plane remains unchanged, the distance between the target object and the camera is negatively correlated with the size of the projection area of ​​the target object on the projection plane, and positively correlated with the number of light-emitting elements that need to be adjusted. The larger the projection area of ​​the target object on the projection plane, the closer the target object is to the camera, and the fewer the number of light-emitting elements that need to be adjusted; the smaller the projection area of ​​the target object on the projection plane, the farther the target object is from the camera, and the more the number of light-emitting elements that need to be adjusted.

[0068] Step 203: Adjust the light source information of the light emitting element that provides the projection light source for the target area.

[0069] The light source information includes at least one of the following parameters: brightness, color, light emission frequency, etc.

[0070] In an embodiment of the present invention, multiple light-emitting elements are used to provide a projection light source for an image display element, and each light-emitting element can be independently controlled. Therefore, when it is determined that there is a target object in the projection space of the projector, the light source information of all or part of the light-emitting elements can be adjusted based on the target object to make the projection light source of the projector adapt to the current scene and improve the user experience.

[0071] In one embodiment, different adjustment strategies can be configured for different object types, that is, a mapping relationship between object type and adjustment strategy is configured. When adjusting the light source information of the light-emitting element, the light-emitting element is adjusted according to the target adjustment strategy that matches the type of the target object.

[0072] For example, when the target object is a human face, in order to prevent the light source of the light-emitting element from directly shining into the user's eyes and causing discomfort to the user, the target adjustment strategy can be set to reduce the brightness of the light-emitting element. Thus, when it is determined that there is a human face in the projection space of the projector, the brightness of the light-emitting element that provides the projection light source for the target area is reduced to prevent the strong light of the light-emitting element from directly shining on the user facing the projector, thereby improving the user experience.

[0073] When the target object is a laser pen, the area indicated by the laser pen may be the area that the user wants to highlight, and the target adjustment strategy can be set to adjust the color of the light-emitting element to a specified color, such as red. Thus, when it is determined that there is a laser pen in the projection space of the projector, the light-emitting element of the specified color among the light-emitting elements that provide projection light sources for the target area is lit, and the light-emitting elements of other colors are extinguished.

[0074] When the projector is in use, the target object will move in the projection space, and the image or infrared radiation signal of the projection space can be periodically acquired to determine the projection area of ​​the target object on the projection plane in real time, and then determine the light-emitting element that needs to be adjusted; or, when it is determined that the target object is moving, the projection area of ​​the target object on the projection plane can be determined, and then determine the light-emitting element that needs to be adjusted; thereby, achieving the effect of timely adjusting the light source information of the light-emitting element according to the moving direction and distance of the target object.

[0075] Corresponding to the aforementioned embodiment of the projector control method, the present invention further provides an embodiment of a projector control device.

[0076] Figure 4 A schematic diagram of a control device for a projector provided by an exemplary embodiment of the present invention, wherein the projector comprises an image display element and a plurality of light emitting elements, each of which is used to provide a projection light source for a different area of ​​the image display element, so as to project the display content of the image display element onto a projection plane;

[0077] The control device comprises:

[0078] A first determining module 41 is used to determine a projection area of ​​the target object on the projection plane when it is determined that there is a target object in the projection space of the projector;

[0079] A second determination module 42, configured to determine a target area in the image display element corresponding to the projection area;

[0080] The adjustment module 43 is used to adjust the light source information of the light emitting element that provides the projection light source for the target area.

[0081] Optionally, the projector further includes a camera; and the control device further includes:

[0082] An acquisition module, used to acquire an image obtained by the camera shooting the projection space;

[0083] The recognition module is used to perform image recognition processing on the image to determine whether a target object exists in the projection space of the projector.

[0084] Optionally, the projector further includes an infrared sensor; and the control device further includes:

[0085] An acquisition module, used for acquiring the infrared radiation signal in the projection space detected by the infrared sensor;

[0086] The identification module is used to determine whether there is a target object in the projection space of the projector according to the infrared radiation signal.

[0087] Optionally, the light source information includes brightness;

[0088] The adjustment module is specifically used for:

[0089] When the target object is a human face, the brightness of the light emitting element providing the projection light source for the target area is reduced.

[0090] Optionally, the adjustment module includes:

[0091] A determination unit, configured to determine a target adjustment strategy that matches the type of the target object according to a mapping relationship between the object type and the adjustment strategy;

[0092] An adjustment unit is used to adjust the light source information of the light-emitting element that provides the projection light source for the target area according to the target adjustment strategy.

[0093] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of the present invention. Ordinary technicians in this field can understand and implement it without paying creative work.

[0094] An embodiment of the present invention provides a projector, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-mentioned projector control methods when executing the computer program.

[0095] The components of the projector may include, but are not limited to: the at least one processor mentioned above, the at least one memory mentioned above, and a bus connecting different system components (including the memory and the processor).

[0096] The bus includes data bus, address bus and control bus.

[0097] The memory may include volatile memory, such as random access memory (RAM) and / or cache memory, and may further include read-only memory (ROM).

[0098] The memory may also include a program tool (or utility) having a set (at least one) of program modules, such program modules including but not limited to: an operating system, one or more application programs, other program modules and program data, each of which or some combination may include the implementation of a network environment.

[0099] The processor executes various functional applications and data processing by running the computer program stored in the memory, such as the method provided in any of the above embodiments.

[0100] The projector can also communicate with one or more external devices. Such communication can be performed through an input / output (I / O) interface. In addition, the model-generated projector can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN) and / or a public network, such as the Internet) through a network adapter.

[0101] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided into multiple units / modules to be embodied.

[0102] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the method provided by any of the above embodiments is implemented.

[0103] The readable storage medium may include but is not limited to: a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device or any suitable combination of the above.

[0104] In a possible implementation manner, the embodiment of the present invention may also be implemented in the form of a program product, which includes a program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute a method for implementing any of the above embodiments.

[0105] The program code for executing the present invention may be written in any combination of one or more programming languages, and may be executed entirely on a user device, partially on a user device, as an independent software package, partially on a user device and partially on a remote device, or entirely on a remote device.

[0106] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A method for controlling a projector, characterized in that: The projector comprises an image display element and a plurality of light emitting elements, each light emitting element being used to provide a projection light source for different areas of the image display element, so as to project the display content of the image display element onto a projection plane; The control method comprises: In the case where it is determined that a target object exists in the projection space of the projector, determining a projection area of ​​the target object on the projection plane; determining a target area in the image display element corresponding to the projection area; When the type of the target object is a laser pen, determining the target adjustment strategy of the laser pen is to light up the light emitting elements of a specified color among the light emitting elements providing a projection light source for the target area, and extinguish the light emitting elements of other colors to highlight the area indicated by the laser pen; According to the target adjustment strategy, light source information of the light emitting element that provides projection light source for the target area is adjusted.

2. The projector control method according to claim 1, characterized in that: The projector further includes a camera; and the control method further includes: Acquire an image obtained by photographing the projection space by the camera; Image recognition processing is performed on the image to determine whether a target object exists in the projection space of the projector.

3. The projector control method according to claim 2, characterized in that: Performing image recognition processing on the image includes: The image is input into a pre-trained image recognition model to determine whether a target object exists in the projection space of the projector according to an output result of the image recognition model.

4. The projector control method according to claim 1, characterized in that: The projector further includes an infrared sensor; and the control method further includes: Acquiring an infrared radiation signal in the projection space detected by the infrared sensor; It is determined whether a target object exists in the projection space of the projector according to the infrared radiation signal.

5. The projector control method according to claim 1, characterized in that: The light source information includes brightness; Adjusting light source information of a light emitting element that provides a projection light source for the target area includes: When the target object is a human face, the brightness of the light emitting element providing the projection light source for the target area is reduced.

6. A control device for a projector, characterized in that: The projector comprises an image display element and a plurality of light emitting elements, each light emitting element being used to provide a projection light source for different areas of the image display element, so as to project the display content of the image display element onto a projection plane; The control device comprises: A first determining module, configured to determine a projection area of ​​the target object on the projection plane when it is determined that there is a target object in the projection space of the projector; A second determining module, configured to determine a target area in the image display element corresponding to the projection area; An adjustment module, used for adjusting light source information of a light emitting element that provides a projection light source for the target area; The adjustment module comprises: A determination unit, configured to determine a target adjustment strategy that matches the type of the target object according to a mapping relationship between the object type and the adjustment strategy; An adjustment unit, configured to adjust light source information of a light emitting element that provides a projection light source for the target area according to the target adjustment strategy; When the target object is a laser pen, the target adjustment strategy is determined to light up light-emitting elements of a specified color among the light-emitting elements that provide projection light sources for the target area, and turn off light-emitting elements of other colors to highlight the area indicated by the laser pen.

7. The control device for a projector according to claim 6, characterized in that: The projector also includes a camera; the control device also includes: An acquisition module, used to acquire an image obtained by the camera shooting the projection space; The recognition module is used to perform image recognition processing on the image to determine whether a target object exists in the projection space of the projector.

8. The control device for a projector according to claim 6, characterized in that: The projector further includes an infrared sensor; the control device further includes: An acquisition module, used for acquiring the infrared radiation signal in the projection space detected by the infrared sensor; The identification module is used to determine whether there is a target object in the projection space of the projector according to the infrared radiation signal.

9. The control device for a projector according to claim 6, characterized in that: The light source information includes brightness; The adjustment module is specifically used for: When the target object is a human face, the brightness of the light emitting element providing the projection light source for the target area is reduced.

10. A projector, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the projector control method according to any one of claims 1 to 5 is implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the projector control method according to any one of claims 1 to 5 is implemented.

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