Electronic device for projecting image, method for controlling same, and electronic system

Abstract

Disclosed is an electronic device. The present electronic device comprises: a projection unit; an interface connected to another electronic device that changes an optical path of the electronic device; and one or more processors connected to the projection unit and the interface and controlling the electronic device, wherein the processor may: identify whether the electronic device and the other electronic device are connected through the interface; if the electronic device is not connected to the other electronic device, project an image generated from content on the basis of first keystone information; and if the electronic device is connected to the other electronic device, control the projection unit to project an inverted image generated from content on the basis of second keystone information.

Description

Electronic device for projecting images, control method thereof and electronic system

[0001] The present disclosure relates to an electronic device, a control method thereof, and an electronic system, and more particularly, to an electronic device, a control method thereof, and an electronic system for projecting an image for controlling a home appliance.

[0002] Advances in electronic technology have led to the development of a diverse range of electronic devices. In particular, various types of projectors have recently become widespread.

[0003] For example, ultra-short-throw projectors have recently become widespread. For example, ultra-short-throw projectors can project large images even when the distance from the projection surface is less than 0.5 m.

[0004] However, conventional projectors, which are not ultra-short throw projectors, require a considerable distance from the projection surface, causing inconvenience to users.

[0005] According to one embodiment of the present disclosure for achieving the above purpose, an electronic device includes a projection unit, an interface connected to another electronic device for changing an optical path of the electronic device, and at least one processor connected to the projection unit and the interface for controlling the electronic device, wherein the processor controls the projection unit to identify whether the electronic device and the other electronic device are connected through the interface, and to project an image generated from content based on first keystone information when the electronic device is not connected to the other electronic device, and to project an inverted image generated from the content based on second keystone information when the electronic device is connected to the other electronic device.

[0006] In addition, the processor further includes a communication interface, and when first orientation information of the other electronic device is received from the other electronic device through the communication interface, the electronic device can identify that the other electronic device is connected to the other electronic device.

[0007] And, the processor may further include a sensor, and the processor may obtain second orientation information of the electronic device through the sensor, obtain information for adjusting a mounting state of the electronic device with respect to the other electronic device based on the first orientation information and the second orientation information, and control the communication interface to transmit the obtained information to the other electronic device.

[0008] In addition, each of the first orientation information and the second orientation information includes information about one of yaw, pitch, and roll, and the processor can obtain information about a rotation direction of the electronic device as information for adjusting the mounting state by comparing information included in the first orientation information and information included in the second orientation information.

[0009] And, the processor can control the projection unit to project the inverted image onto a mirror included in the other electronic device when the electronic device is connected to the other electronic device and power is supplied from the other electronic device through the interface.

[0010] In addition, the camera is further included, and the processor can obtain a first photographed image of the mirror through the camera, and obtain the second keystone information based on the first photographed image so that the inverted image is projected within a guide line displayed on the mirror.

[0011] And, the electronic device is a projector that requires a projection distance greater than a preset first distance, and the mirror reflects light output from the projection unit to a projection surface less than a preset second distance from the other electronic device while the electronic device is connected to the other electronic device, and the preset first distance may be greater than the preset second distance.

[0012] In addition, the apparatus further includes a communication interface, wherein the processor receives a second photographed image from the other electronic device through the communication interface, obtains the second keystone information based on the second photographed image, and the light output through the projection unit is reflected onto a projection surface through a mirror included in the other electronic device, and the second photographed image may be an image of the projection surface being photographed.

[0013] And, it further includes a sensor, and the processor can obtain second orientation information of the electronic device through the sensor, and control the projection unit to project a left-right inverted image or an up-down-left-right inverted image generated from the content based on the second orientation information.

[0014] Meanwhile, according to one embodiment of the present disclosure, an electronic system includes an electronic device that projects an image generated from content and another electronic device that supplies power to the electronic device when the electronic device is connected, and the electronic device can project an inverted image generated from the content when the electronic device is connected to the other electronic device and power is supplied from the other electronic device.

[0015] Additionally, the other electronic device may provide information on whether the electronic device or at least one of the other electronic devices is turned on based on whether power is supplied to the electronic device.

[0016] And, when the other electronic device is identified as being powered by the electronic device, the other electronic device may obtain first orientation information of the other electronic device, transmit the first orientation information to the electronic device, the electronic device may obtain second orientation information of the electronic device, obtain information for adjusting a mounting state of the electronic device with respect to the other electronic device based on the first orientation information and the second orientation information, transmit information for adjusting the mounting state to the other electronic device, and the other electronic device may provide information for adjusting the mounting state.

[0017] Additionally, each of the first orientation information and the second orientation information may include information about one of yaw, pitch, and roll, and the information for adjusting the mounting state may include information about a rotation direction of the electronic device.

[0018] And, the electronic device is a projector that requires a projection distance greater than a preset first distance, and the other electronic device includes a mirror that reflects light output from the electronic device to a projection surface less than a preset second distance from the other electronic device while the electronic device is connected to the other electronic device, and the preset first distance may be greater than the preset second distance.

[0019] Meanwhile, according to one embodiment of the present disclosure, a method for controlling an electronic device may include a step of identifying whether the electronic device and another electronic device that changes an optical path of the electronic device are connected, and a step of projecting an image generated from content based on first keystone information when the electronic device is not connected to the other electronic device, and a step of projecting an inverted image generated from the content based on second keystone information when the electronic device is connected to the other electronic device.

[0020] Additionally, the identifying step may identify the electronic device as being connected to the other electronic device when the first orientation information of the other electronic device is received from the other electronic device.

[0021] And, the method may further include a step of obtaining second orientation information of the electronic device, a step of obtaining information for adjusting a mounting state of the electronic device with respect to the other electronic device based on the first orientation information and the second orientation information, and a step of transmitting the obtained information to the other electronic device.

[0022] In addition, each of the first orientation information and the second orientation information includes information on one of yaw, pitch, and roll, and the step of obtaining information for adjusting the mounting state may compare information included in the first orientation information and information included in the second orientation information to obtain information on a rotation direction of the electronic device as information for adjusting the mounting state.

[0023] And, the projecting step can project the inverted image onto a mirror included in the other electronic device when the electronic device is connected to the other electronic device and power is supplied from the other electronic device.

[0024] In addition, the method may further include a step of acquiring a first photographed image in which the mirror is photographed, and a step of acquiring the second keystone information based on the first photographed image so that the inverted image is projected within a guide line displayed on the mirror.

[0025] And, the electronic device is a projector that requires a projection distance greater than a preset first distance, and the mirror reflects light output from the electronic device while the electronic device is connected to the other electronic device to a projection surface less than a preset second distance from the other electronic device, and the preset first distance may be greater than the preset second distance.

[0026] In addition, the method further includes a step of receiving a second photographed image from the other electronic device and a step of obtaining the second keystone information based on the second photographed image, wherein light output through the electronic device is reflected onto a projection surface through a mirror included in the other electronic device, and the second photographed image may be an image of the projection surface being photographed.

[0027] FIG. 1 is a drawing for explaining a projector other than an ultra-short-focus projector according to one embodiment of the present disclosure.

[0028] FIG. 2 is a block diagram illustrating an electronic system according to an embodiment of the present disclosure.

[0029] FIG. 3 is a block diagram showing the configuration of an electronic device according to an embodiment of the present disclosure.

[0030] FIG. 4 is a block diagram showing a detailed configuration of an electronic device according to an embodiment of the present disclosure.

[0031] FIG. 5 is a block diagram showing the configuration of another electronic device according to one embodiment of the present disclosure.

[0032] FIG. 6 is a drawing for explaining a method of connecting an electronic device and another electronic device according to one embodiment of the present disclosure.

[0033] FIG. 7 is a drawing for explaining a connection portion of an electronic device and another electronic device according to one embodiment of the present disclosure.

[0034] FIG. 8 is a drawing for explaining a power supply state according to one embodiment of the present disclosure.

[0035] FIGS. 9 to 12 are drawings for explaining the alignment of an electronic device and another electronic device according to one embodiment of the present disclosure.

[0036] FIGS. 13 and 14 are drawings for explaining keystone correction according to one embodiment of the present disclosure.

[0037] FIG. 15 is a drawing for explaining a method for keystone correction of a projection angle for a projection surface of another electronic device according to one embodiment of the present disclosure.

[0038] FIG. 16 and FIG. 17 are drawings for explaining a method of utilizing an electronic system according to an embodiment of the present disclosure.

[0039] FIG. 18 is a flowchart for explaining a control method of an electronic device according to an embodiment of the present disclosure.

[0040] The purpose of the present disclosure is to provide an electronic device, a control method thereof, and an electronic system for projecting a large screen in a narrow space like an ultra-short-throw projector, even when using a projector other than an ultra-short-throw projector.

[0041] Hereinafter, the present disclosure will be described in detail with reference to the attached drawings.

[0042] The terms used in the embodiments of this disclosure have been selected from widely used, current terms, taking into account the functions of this disclosure. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, terms may be arbitrarily selected by the applicant, and in such cases, their meanings will be described in detail in the description of the relevant disclosure. Therefore, the terms used in this disclosure should not be defined simply as names of terms, but rather based on the meanings of the terms and the overall content of this disclosure.

[0043] In this specification, expressions such as “has,” “can have,” “includes,” or “may include” indicate the presence of a feature (e.g., a number, function, operation, or component such as a part), and do not exclude the presence of additional features.

[0044] The expression "at least one of A and / or B" should be understood to mean either "A" or "B" or "A and B".

[0045] As used herein, the expressions “first,” “second,” “first,” or “second,” etc., may describe various components, regardless of order and / or importance, and are only used to distinguish one component from another, but do not limit the components.

[0046] Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "comprise" or "consist of" are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but should be understood not to preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0047] In this specification, the term user may refer to a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).

[0048] Various embodiments of the present disclosure will be described in more detail with reference to the attached drawings below.

[0049] FIG. 1 is a drawing for explaining a projector other than an ultra-short-focus projector according to one embodiment of the present disclosure.

[0050] Ultra-short throw projectors can project large screens even when the distance from the projection surface is less than 0.5 m.

[0051] However, projectors that are not ultra-short-throw projectors require a significant distance from the projection surface. For example, as illustrated in Figure 1, a projector that is not an ultra-short-throw projector requires a significant distance from the projection surface because the light emitted from the projector travels straight ahead. For example, a projector that is not an ultra-short-throw projector may require a distance of 3 meters or more to project a 100-inch screen.

[0052] Below we explain how to use a projector that is not an ultra-short-throw projector as an ultra-short-throw projector.

[0053] FIG. 2 is a block diagram illustrating an electronic system (1000) according to an embodiment of the present disclosure. As illustrated in FIG. 2, the electronic system (1000) includes an electronic device (100) and another electronic device (200).

[0054] The electronic device (100) may be a device that projects an image. For example, the electronic device (100) may be, for example, a projector that projects an image.

[0055] The electronic device (100) may be a device that requires a projection distance greater than a preset first distance. Here, the preset first distance may be a distance greater than a projection distance required by an ultra-short-throw projector or a short-throw projector. In other words, the electronic device (100) may be a projector other than an ultra-short-throw projector or a short-throw projector.

[0056] However, it is not limited thereto, and the electronic device (100) may be any device that projects an image and requires a projection distance greater than the preset first distance.

[0057] The other electronic device (200) may be a device that changes the light path of the electronic device (100). For example, the other electronic device (200) may include a holder on which the electronic device (100) may be placed, and may be a device that reflects light emitted from the electronic device (100) through a mirror while the electronic device (100) is placed on the holder.

[0058] However, it is not limited thereto, and the other electronic device (200) may be any device that changes the optical path of the electronic device (100).

[0059] FIG. 3 is a block diagram showing the configuration of an electronic device (100) according to one embodiment of the present disclosure.

[0060] According to FIG. 3, the electronic device (100) includes a projection unit (110), an interface (120), and a processor (130).

[0061] The projection unit (110) can project an image. Specifically, the projection unit (110) can project an image or moving image based on at least one of content received from a source device and pre-stored content using a light source such as a lamp or LED.

[0062] The interface (120) may be configured to be connected to another electronic device (200). For example, the interface (120) may include at least one of a configuration for being connected to another electronic device (200), a configuration for receiving power from another electronic device (200), or a configuration for transmitting and receiving data with another electronic device (200).

[0063] The processor (130) controls the overall operation of the electronic device (100). Specifically, the processor (130) is connected to each component of the electronic device (100) and can control the overall operation of the electronic device (100). For example, the processor (130) is connected to components such as the projection unit (110), the interface (120), and the communication interface (not shown) and can control the operation of the electronic device (100).

[0064] The one or more processors (130) may include one or more of a CPU, a GPU (Graphics Processing Unit), an APU (Accelerated Processing Unit), a MIC (Many Integrated Core), an NPU (Neural Processing Unit), a hardware accelerator, or a machine learning accelerator. The one or more processors (130) may control one or any combination of other components of the electronic device (100) and perform operations related to communication or data processing. The one or more processors (130) may execute one or more programs or instructions stored in a memory. For example, the one or more processors (130) may perform a method according to an embodiment of the present disclosure by executing one or more instructions stored in a memory.

[0065] When a method according to an embodiment of the present disclosure includes multiple operations, the multiple operations may be performed by one processor or by multiple processors. For example, when a first operation, a second operation, and a third operation are performed by a method according to an embodiment, the first operation, the second operation, and the third operation may all be performed by the first processor, or the first operation and the second operation may be performed by the first processor (e.g., a general-purpose processor) and the third operation may be performed by the second processor (e.g., an artificial intelligence-specific processor).

[0066] One or more processors (130) may be implemented as a single core processor including one core, or may be implemented as one or more multicore processors including multiple cores (e.g., homogeneous multicores or heterogeneous multicores). When one or more processors (130) are implemented as a multicore processor, each of the multiple cores included in the multicore processor may include an internal processor memory, such as a cache memory or an on-chip memory, and a common cache shared by the multiple cores may be included in the multicore processor. In addition, each of the multiple cores (or some of the multiple cores) included in the multicore processor may independently read and execute a program instruction for implementing a method according to an embodiment of the present disclosure, or all (or some) of the multiple cores may be linked to read and execute a program instruction for implementing a method according to an embodiment of the present disclosure.

[0067] When a method according to an embodiment of the present disclosure includes a plurality of operations, the plurality of operations may be performed by one core among the plurality of cores included in a multi-core processor, or may be performed by the plurality of cores. For example, when a first operation, a second operation, and a third operation are performed by a method according to an embodiment, the first operation, the second operation, and the third operation may all be performed by a first core included in the multi-core processor, or the first operation and the second operation may be performed by a first core included in the multi-core processor, and the third operation may be performed by a second core included in the multi-core processor.

[0068] In embodiments of the present disclosure, one or more processors (130) may refer to a system on a chip (SoC) in which one or more processors and other electronic components are integrated, a single-core processor, a multi-core processor, or a core included in a single-core processor or a multi-core processor, wherein the core may be implemented as a CPU, a GPU, an APU, a MIC, an NPU, a hardware accelerator, or a machine learning accelerator, but the embodiments of the present disclosure are not limited thereto. However, for convenience of explanation, the operation of the electronic device (100) is described below using the expression processor (130).

[0069] The processor (130) can identify whether the electronic device (100) and another electronic device (200) are connected through the interface (120), and if the electronic device (100) is not connected to another electronic device (200), can control the projection unit (110) to project an image generated from the content based on the first keystone information, and if the electronic device (100) is connected to another electronic device (200), can project an inverted image generated from the content based on the second keystone information. Here, the keystone information is information for performing keystone correction, and the keystone correction can be an operation of correcting a screen that may appear trapezoidal depending on the projection distance and projection angle of the projector into a rectangular shape based on the screen border.

[0070] The other electronic device (200) includes a mirror, and when the electronic device (100) is connected to the other electronic device (200), light output from the projection unit (11) can be reflected by the mirror and reach the projection surface. That is, since the image is inverted due to reflection by the mirror, the processor (130) can control the projection unit (110) to project an inverted image generated from the content when the electronic device (100) is connected to the other electronic device (200).

[0071] The processor (130) can generate an inverted image based on the direction of change in the optical path by the other electronic device (200). For example, the processor (130) can generate an inverted image with left and right sides reversed based on the direction of change in the optical path by the other electronic device (200). Alternatively, the processor (130) can generate an inverted image with top and bottom sides reversed based on the direction of change in the optical path by the other electronic device (200). Alternatively, the processor (130) can generate an inverted image with top and bottom sides reversed based on the direction of change in the optical path by the other electronic device (200).

[0072] The electronic device (100) further includes a communication interface, and when the processor (130) receives first orientation information of the other electronic device (200) from the other electronic device (200) through the communication interface, the electronic device (100) can identify that it is connected to the other electronic device (200).

[0073] However, it is not limited thereto, and the processor (130) may identify that the electronic device (100) is connected to another electronic device (200) when power is supplied from the other electronic device (200) through the interface (120).

[0074] The electronic device (100) further includes a sensor, and the processor (130) can obtain second orientation information of the electronic device (100) through the sensor, obtain information for adjusting a mounting state of the electronic device (100) with respect to another electronic device (200) based on the first orientation information and the second orientation information, and control a communication interface to transmit the obtained information to the other electronic device (200).

[0075] For example, if the processor (130) identifies that the electronic device (100) is connected to another electronic device (200), the processor (130) may obtain second orientation information of the electronic device (100) through the sensor. For example, if power is supplied from another electronic device (200) or first orientation information is received from another electronic device (200), the processor (130) may obtain second orientation information of the electronic device (100) through the sensor. However, the present invention is not limited thereto, and the operation of obtaining the second orientation information may be independent of the operation of connecting the electronic device (100) to another electronic device (200).

[0076] Each of the first orientation information and the second orientation information includes information on one of yaw, pitch, and roll, and the processor (130) can obtain information on the rotation direction of the electronic device (100) as information for adjusting the mounting state by comparing the information included in the first orientation information and the information included in the second orientation information.

[0077] However, it is not limited thereto, and the processor (130) may provide information for adjusting the holding state to the user without transmitting it to another electronic device (200).

[0078] The processor (130) can control the projection unit (110) to project an inverted image onto a mirror included in the electronic device (200) when the electronic device (100) is connected to another electronic device (200) and power is supplied from the other electronic device (200) through the interface (120).

[0079] However, the present invention is not limited thereto, and when the processor (130) receives first orientation information from another electronic device (200), the processor (130) may control the projection unit (110) to project an inverted image onto a mirror included in the other electronic device (200). Alternatively, when the first orientation information and the second orientation information are the same, the processor (130) may control the projection unit (110) to project an inverted image onto a mirror included in the other electronic device (200).

[0080] The electronic device (100) further includes a camera, and the processor (130) can obtain a first photographed image of the mirror through the camera, and obtain second keystone information based on the first photographed image so that the inverted image is projected within the guide line displayed on the mirror.

[0081] The electronic device (100) is a projector that requires a projection distance greater than a first preset distance, and the mirror reflects light output from the projection unit (110) to a projection surface less than a second preset distance from the other electronic device (200) when the electronic device (100) is connected to another electronic device (200), and the first preset distance may be greater than the second preset distance. For example, the electronic device (100) is a projector that requires a projection distance of, for example, 3 m or more, rather than an ultra-short-throw projector or a short-throw projector, and the other electronic device (200) may be a device that assists in providing a large screen at a projection distance of, for example, 0.5 m or less by changing the light path of the electronic device (100). That is, by using the other electronic device (200), the electronic device (100) can operate as a projector that provides a large screen even within a short projection distance, like an ultra-short-throw projector or a short-throw projector.

[0082] The electronic device (100) further includes a communication interface, and the processor (130) receives a second captured image from another electronic device (200) through the communication interface, obtains second keystone information based on the second captured image, and light output through the projection unit (110) is reflected onto a projection surface through a mirror included in the other electronic device (200), and the second captured image may be an image of the projection surface being captured. Through this operation, the electronic device (100) can provide a rectangular screen even if the other electronic device (200) is placed in a tilted state with respect to the projection surface.

[0083] The electronic device (100) further includes a sensor, and the processor (130) can obtain second orientation information of the electronic device (100) through the sensor, and control the projection unit (110) to project a left-right inverted image or an up-down-left-right inverted image generated from content based on the second orientation information.

[0084]

[0085] *For example, when the electronic device (100) is connected to another electronic device (200), if the upper side of the electronic device (100) is connected so that it faces the ceiling, the processor (130) may control the projection unit (110) to project a left-right inverted image generated from the content based on the second orientation information indicating that the electronic device (100) is not flipped. Alternatively, when the electronic device (100) is connected to another electronic device (200), if the lower side of the electronic device (100) is connected so that it faces the ceiling, the processor (130) may control the projection unit (110) to project a top-bottom, left-right, and right-inverted image generated from the content based on the second orientation information indicating that the electronic device (100) is flipped.

[0086] However, the present invention is not limited thereto, and the processor (130) may control the projection unit (110) to project a rotated image rather than an inverted image based on the second orientation information. For example, the processor (130) may control the projection unit (110) to project a rotated image in which the content is rotated 90 degrees based on the second orientation information. Alternatively, the processor (130) may control the projection unit (110) to project an image generated by inverting and rotating the content based on the second orientation information.

[0087] FIG. 4 is a block diagram showing a detailed configuration of an electronic device (100) according to an embodiment of the present disclosure. The electronic device (100) may include a projection unit (110), an interface (120), and a processor (130). The electronic device (100) may further include a communication interface (140), a sensor (150), a camera (160), a display (170), a user interface (180), a microphone (190), and a speaker (195). For components illustrated in FIG. 4 that overlap with components illustrated in FIG. 3, a detailed description thereof will be omitted.

[0088] The communication interface (140) is a configuration that performs communication with various types of external devices according to various types of communication methods. For example, an electronic device (100) can perform communication with another electronic device (200), etc., through the communication interface (140).

[0089] The communication interface (140) may include a Wi-Fi module, a Bluetooth module, an infrared communication module, a wireless communication module, etc. Here, each communication module may be implemented in the form of at least one hardware chip.

[0090] Wi-Fi and Bluetooth modules communicate via Wi-Fi and Bluetooth, respectively. When using a Wi-Fi or Bluetooth module, connection information, such as the SSID and session key, is first transmitted and received. This information is then used to establish a communication connection before various other information can be transmitted and received. Infrared communication modules use infrared data association (IrDA) technology, which wirelessly transmits data over short distances using infrared light, which lies between visible light and millimeter waves.

[0091] In addition to the above-described communication method, the wireless communication module may include at least one communication chip that performs communication according to various wireless communication standards such as zigbee, 3G (3rd Generation), 3GPP (3rd Generation Partnership Project), LTE (Long Term Evolution), LTE-A (LTE Advanced), 4G (4th Generation), 5G (5th Generation), etc.

[0092] Alternatively, the communication interface (140) may include a wired communication interface such as HDMI, DP, Thunderbolt, USB, RGB, D-SUB, DVI, etc.

[0093] In addition, the communication interface (140) may include at least one of a LAN (Local Area Network) module, an Ethernet module, or a wired communication module that performs communication using a pair cable, a coaxial cable, or an optical fiber cable.

[0094] The sensor (150) may be configured to obtain orientation information of the electronic device (100) through at least one sensor. For example, the sensor (150) may include at least one of a gyro sensor, an acceleration sensor, or a magnetometer sensor.

[0095] A gyro sensor is a sensor that detects the rotation angle of an electronic device (100) by measuring angular velocity. It can measure changes in the orientation of an object by utilizing the property of always maintaining a certain initially set direction with high accuracy regardless of the rotation of the Earth. A gyro sensor is also called a gyroscope, and can be implemented mechanically or optically using light.

[0096] An acceleration sensor is a sensor that measures the acceleration or impact intensity of an electronic device (100), and is also called an accelerometer. An acceleration sensor detects dynamic forces such as acceleration, vibration, and impact, and can be implemented as an inertial type, a gyro type, a silicon semiconductor type, etc. depending on the detection method. In other words, an acceleration sensor is a sensor that senses the degree of inclination of an electronic device (100) using gravitational acceleration, and can typically be formed of a two-axis or three-axis fluxgate.

[0097] A magnetometer sensor generally refers to a sensor that measures the strength and direction of the Earth's magnetism, but in a broader sense, it also includes a sensor that measures the strength of an object's magnetization, and is also called a magnetometer. A magnetometer sensor can be implemented by suspending a magnet horizontally in a magnetic field and measuring the direction of the magnet's movement, or by rotating a coil in a magnetic field and measuring the induced electromotive force generated in the coil to measure the strength of the magnetic field.

[0098] By using sensors such as the above, it is possible to obtain orientation information of an electronic device (100). For example, the orientation information of an electronic device (100) can be expressed as a pitch angle, a roll angle, and an azimuth angle.

[0099] For convenience of explanation, the sensor (150) is described as including at least one of a gyro sensor, an acceleration sensor, or a magnetometer sensor. However, the present invention is not limited thereto, and the sensor (150) may be any sensor capable of obtaining orientation information of the electronic device (100).

[0100] Memory (155) may refer to hardware that stores information such as data in an electrical or magnetic form so that a processor (130) or the like can access it. To this end, memory (155) may be implemented as at least one piece of hardware from among non-volatile memory, volatile memory, flash memory, hard disk drive (HDD), solid state drive (SSD), RAM, ROM, etc.

[0101] The memory (155) may store at least one instruction required for the operation of the electronic device (100) or the processor (130). Here, the instruction is a code unit that instructs the operation of the electronic device (100) or the processor (130), and may be written in machine language, which is a language that a computer can understand. Alternatively, the memory (155) may store EDID and DPCD for the display (120).

[0102] The memory (155) may store data in bit or byte units that can represent characters, numbers, images, etc. For example, keystone information may be stored in the memory (155). For example, the keystone information may include information for correcting an image so that the image projected by the electronic device (100) is projected within the guide lines displayed on the mirror of the other electronic device (200) when the electronic device (100) is connected to the other electronic device (200).

[0103] The memory (155) is accessed by the processor (130), and reading / writing / modifying / deleting / updating instructions, instruction sets, or data can be performed by the processor (130).

[0104] The camera (160) is configured to capture still images or moving images. The camera (160) can capture still images at a specific point in time, but can also capture still images continuously. The camera (160) can capture images in at least one direction of the electronic device (100).

[0105] The camera (160) includes a lens, a shutter, an aperture, a solid-state image sensor, an AFE (Analog Front End), and a TG (Timing Generator). The shutter controls the time at which light reflected from a subject enters the camera (160), and the aperture mechanically increases or decreases the size of the opening through which light enters to control the amount of light incident on the lens. When the solid-state image sensor accumulates light reflected from a subject as a photocharge, the image generated by the photocharge is output as an electrical signal. The TG outputs a timing signal for reading out pixel data of the solid-state image sensor, and the AFE samples and digitizes the electrical signal output from the solid-state image sensor.

[0106] The display (170) is a component that displays content and can be implemented as a variety of displays such as an LCD (Liquid Crystal Display), an OLED (Organic Light Emitting Diodes) display, a PDP (Plasma Display Panel), etc. The display (170) may also include a driving circuit, a backlight unit, etc. that can be implemented as a form such as an a-si TFT, an LTPS (low temperature poly silicon) TFT, an OTFT (organic TFT), etc. Meanwhile, the display (170) may be implemented as a touch screen combined with a touch sensor, a flexible display, a 3D display, etc.

[0107] The user interface (180) may be implemented with buttons, a touch pad, a mouse, a keyboard, etc., or may be implemented with a touch screen capable of performing both display and operation input functions. Here, the buttons may be various types of buttons, such as mechanical buttons, touch pads, wheels, etc., formed on any area of ​​the front, side, or back of the main body of the electronic device (100).

[0108] The microphone (190) is configured to receive sound and convert it into an audio signal. The microphone (190) is electrically connected to the processor (130) and can receive sound under the control of the processor (130).

[0109] For example, the microphone (190) may be formed as an integrated unit integrated into the upper side, front side, side side, etc. of the electronic device (100). Alternatively, the microphone (190) may be provided in a remote control, etc., separate from the electronic device (100). In this case, the remote control may receive sound through the microphone (190) and provide the received sound to the electronic device (100).

[0110] The microphone (190) may include various configurations such as a microphone that collects analog sound, an amplifier circuit that amplifies the collected sound, an A / D conversion circuit that samples the amplified sound and converts it into a digital signal, and a filter circuit that removes noise components from the converted digital signal.

[0111] Meanwhile, the microphone (190) may be implemented in the form of a sound sensor, and any method may be used as long as it has a configuration capable of collecting sound.

[0112] The speaker (195) is a component that outputs various audio data processed by the processor (130) as well as various notification sounds and voice messages.

[0113] As described above, the electronic device (100) can operate in a first mode that projects an image corresponding to the content or a second mode that projects an inverted image corresponding to the content based on whether it is connected to another electronic device (200), thereby providing the user with various options. In particular, when the electronic device (100) operates in the second mode, it can overcome spatial constraints, thereby improving user convenience.

[0114] FIG. 5 is a block diagram showing the configuration of another electronic device (200) according to one embodiment of the present disclosure.

[0115] According to FIG. 5, the other electronic device (200) includes an interface (210), a mirror (220), and a processor (230).

[0116] The interface (210) may be configured to be connected to an electronic device (100). For example, the interface (120) may include at least one of a configuration for being connected to an electronic device (100), a configuration for supplying power to the electronic device (100), or a configuration for transmitting and receiving data with the electronic device (100).

[0117] The mirror (220) may be configured to reflect light output from the electronic device (100). The mirror (220) may have guide lines displayed to guide the position of the light output from the electronic device (100).

[0118] The processor (230) controls the overall operation of the other electronic device (200). Specifically, the processor (230) is connected to each component of the other electronic device (200) and can control the overall operation of the other electronic device (200). For example, the processor (230) is connected to components such as an interface (210), a mirror (220), a sensor (not shown), and the like and can control the operation of the other electronic device (200).

[0119] The one or more processors (230) may include one or more of a CPU, a GPU (Graphics Processing Unit), an APU (Accelerated Processing Unit), a MIC (Many Integrated Core), an NPU (Neural Processing Unit), a hardware accelerator, or a machine learning accelerator. The one or more processors (230) may control one or any combination of other components of the other electronic device (200) and may perform operations related to communication or data processing. The one or more processors (230) may execute one or more programs or instructions stored in a memory. For example, the one or more processors (230) may perform a method according to an embodiment of the present disclosure by executing one or more instructions stored in a memory.

[0120] When a method according to an embodiment of the present disclosure includes multiple operations, the multiple operations may be performed by one processor or by multiple processors. For example, when a first operation, a second operation, and a third operation are performed by a method according to an embodiment, the first operation, the second operation, and the third operation may all be performed by the first processor, or the first operation and the second operation may be performed by the first processor (e.g., a general-purpose processor) and the third operation may be performed by the second processor (e.g., an artificial intelligence-specific processor).

[0121] One or more processors (230) may be implemented as a single core processor including one core, or may be implemented as one or more multicore processors including multiple cores (e.g., homogeneous multicores or heterogeneous multicores). When one or more processors (230) are implemented as multicore processors, each of the multiple cores included in the multicore processor may include internal processor memory such as cache memory or on-chip memory, and a common cache shared by the multiple cores may be included in the multicore processor. In addition, each of the multiple cores (or some of the multiple cores) included in the multicore processor may independently read and execute a program instruction for implementing a method according to an embodiment of the present disclosure, or all (or some) of the multiple cores may be linked to read and execute a program instruction for implementing a method according to an embodiment of the present disclosure.

[0122] When a method according to an embodiment of the present disclosure includes a plurality of operations, the plurality of operations may be performed by one core among the plurality of cores included in a multi-core processor, or may be performed by the plurality of cores. For example, when a first operation, a second operation, and a third operation are performed by a method according to an embodiment, the first operation, the second operation, and the third operation may all be performed by a first core included in the multi-core processor, or the first operation and the second operation may be performed by a first core included in the multi-core processor, and the third operation may be performed by a second core included in the multi-core processor.

[0123] In embodiments of the present disclosure, one or more processors (230) may refer to a system on a chip (SoC) in which one or more processors and other electronic components are integrated, a single-core processor, a multi-core processor, or a core included in a single-core processor or a multi-core processor, wherein the core may be implemented as a CPU, a GPU, an APU, a MIC, an NPU, a hardware accelerator, or a machine learning accelerator, but the embodiments of the present disclosure are not limited thereto. However, for convenience of explanation, the operation of the other electronic device (200) is described below using the expression processor (230).

[0124] The processor (230) may provide information on whether at least one of the electronic device (100) or the other electronic device (200) is turned on based on whether power is supplied to the electronic device (100). For example, the processor (230) may indicate a first state in which the other electronic device (200) is turned on but the electronic device (100) is not connected by lighting an LED of a first color. Alternatively, the processor (230) may indicate a second state in which the electronic device (100) is mounted on the other electronic device (200) but the power terminals between the electronic device (100) and the other electronic device (200) are not in contact by lighting an LED of a second color. Alternatively, the processor (230) may indicate a third state in which power is supplied to the electronic device (100) by lighting an LED of a third color.

[0125] However, this is not limited to this, and the processor (230) may provide information in any number of other ways. For example, the processor (230) may provide the current status as sound.

[0126] The other electronic device (200) may further include a sensor and a communication interface. Here, the sensor and the communication interface of the other electronic device (200) may have the same or similar configuration as the sensor (150) and the communication interface (140) of the electronic device (100), respectively. When the processor (230) identifies that power is supplied to the electronic device (100), the processor (230) may acquire first orientation information of the other electronic device (200) through the sensor and control the communication interface to transmit the first orientation information to the electronic device (200).

[0127] The electronic device (100) can receive first orientation information and transmit information for adjusting the mounting state of the electronic device (100) with respect to another electronic device (200) to the other electronic device (200).

[0128] The processor (230) may receive information for adjusting the mounting state from the electronic device (100) and provide the information for adjusting the mounting state to the user. Here, the information for adjusting the mounting state may include information about the rotation direction of the electronic device (100).

[0129] For example, the processor (230) may light an LED in the right direction when information for adjusting the mounting state indicates that the electronic device (100) should be rotated to the right, and may light an LED in the left direction when information for adjusting the mounting state indicates that the electronic device (100) should be rotated to the left.

[0130] Meanwhile, the other electronic device (200) may further include a camera. Here, the camera of the other electronic device (200) may have the same or similar configuration as the camera (160) of the electronic device (100). The processor (230) may capture a projection surface through the camera to obtain a captured image and transmit the captured image to the electronic device (100). The electronic device (100) may perform keystone correction based on the captured image received from the other electronic device (200).

[0131] As described above, the other electronic device (200) can identify whether it is connected to the electronic device (100) and align information, and provide the identified information to the user to assist the electronic device (100) in operating as an ultra-short-focus projector or a single-focus projector.

[0132] FIG. 6 is a drawing for explaining a connection method of an electronic device (100) and another electronic device (200) according to one embodiment of the present disclosure.

[0133] First, as shown in the upper drawing of Fig. 6, with the other electronic device (200) placed on the floor, the electronic device (100) can be lowered in a downward direction (610) and placed on the other electronic device (200).

[0134] And, as shown in the middle drawing of FIG. 6, when the electronic device (100) is moved to the left direction (620), the interface (120) of the electronic device (100) and the interface (210) of another electronic device (200) can come into contact, as shown in the lower drawing of FIG. 6.

[0135] FIG. 6 shows an example of the shape of an electronic device (100) and another electronic device (200), and the shape of the electronic device (100) and another electronic device (200) may be changed in any number of ways.

[0136] FIG. 7 is a drawing for explaining a connection portion of an electronic device (100) and another electronic device (200) according to one embodiment of the present disclosure.

[0137] When moving the electronic device (100) as shown in the middle drawing of FIG. 6, the other electronic device (200) may provide a line (assembly guide line) to guide the movement of the electronic device (100) as shown in the upper drawing of FIG. 7.

[0138] The interface (120) of the electronic device (100) may include a protrusion and a power interface (710) for connecting with the interface (210) of another electronic device (200), as shown in the lower drawing of FIG. 7.

[0139] In FIG. 7, the interface (210) of the other electronic device (200) is illustrated as being formed in a form fixed to one side of the main body, but is not limited thereto. For example, the interface (210) of the other electronic device (200) may be formed in a circular shape and may be connected to one side of the main body through one axis. In this case, the other electronic device (200) may further include a driving unit for rotating the interface (210) and may automatically perform the alignment described below. Alternatively, the other electronic device (200) may include at least one driving unit for rotating the interface (210) in at least one of yaw, pitch, or roll. In this case, the other electronic device (200) may further include at least one driving unit for rotating the mirror (220) in response to the rotation of the interface (210).

[0140] FIG. 8 is a drawing for explaining a power supply state according to one embodiment of the present disclosure.

[0141] The processor (230) may provide information on whether at least one of the electronic device (100) or the other electronic device (200) is turned on based on whether power is supplied to the electronic device (100). For example, as illustrated in FIG. 8, the processor (230) may display a state in which the other electronic device (200) is turned on in black, a state in which the electronic device (100) is mounted on the other electronic device (200) but the power terminals between the electronic device (100) and the other electronic device (200) are not in contact in white, and a state in which the electronic device (100) is turned on in gray.

[0142] However, the present invention is not limited thereto, and the processor (230) may identify whether the electronic device (100) is turned on in any number of other ways. For example, the processor (230) may provide information on whether the electronic device (100) and another electronic device (200) are turned on based on at least one of whether power is supplied to the electronic device (100) or whether communication with the electronic device (100) is taking place. For example, the processor (230) may identify that only the other electronic device (200) is turned on when power is not supplied to the electronic device (100), identify that only the other electronic device (200) is turned on when power is supplied to the electronic device (100) but communication with the electronic device (100) is not possible, identify that only the other electronic device (200) is turned on but the electronic device (100) is connected, and identify that the electronic device (100) is connected to the other electronic device (200) and turned on when power is supplied to the electronic device (100) and communication with the electronic device (100) is possible.

[0143] FIGS. 9 to 12 are drawings for explaining the alignment of an electronic device (100) and another electronic device (200) according to one embodiment of the present disclosure.

[0144] First, for convenience of explanation, FIG. 9 describes the sensor (150) of the electronic device (100), but the same description can also be applied to the sensor of another electronic device (200).

[0145] The processor (130) can identify orientation information of the electronic device (100) through the sensor (150). For example, as illustrated in FIG. 9, the processor (130) can obtain a yaw angle, a pitch angle, and a roll angle, which indicate the degree of inclination of the electronic device (100) with respect to each axis, through the sensor (150).

[0146] In this way, the electronic device (100) obtains information about the degree of inclination for each of the X-axis, Y-axis, and Z-axis as orientation information, as illustrated in FIG. 10, and the other electronic device (200) can also obtain information about the degree of inclination for each of the X-axis, Y-axis, and Z-axis as orientation information.

[0147] The alignment of the electronic device (100) and the other electronic device (200) may not match. For example, as illustrated in FIG. 11, the inclination of the electronic device (100) with respect to the X-axis may be different from the inclination of the other electronic device (200), and the processor (130) may compare the orientation information of the electronic device (100) with the orientation information of the other electronic device (200) to identify that alignment with respect to the X-axis is required. Here, since the other electronic device (200) is fixed to the floor, the processor (130) may obtain information on the rotational direction of the electronic device (100) so that the electronic device (100) has the same orientation information as the orientation information of the other electronic device (200).

[0148] The processor (130) transmits information about the direction of rotation to another electronic device (200), and the other electronic device (200) can provide information that rotation to the right or left is necessary or that the alignment is consistent, as shown in FIG. 12.

[0149] FIG. 13 and FIG. 14 are drawings for explaining keystone correction according to one embodiment of the present disclosure.

[0150] The electronic device (100) may include a mirror (220), as illustrated in FIG. 13. The mirror (220) may include a guide line (221) that guides light output from the electronic device (100) to be reflected within a preset area of ​​the mirror (220).

[0151] The processor (130) can control the projection unit (110) to project an inverted image generated from content based on the second keystone information when the electronic device (100) is connected to another electronic device (200). Here, the second keystone information may be keystone information for normal screen output when the electronic device (100) is connected to another electronic device (200), and may be information stored in the memory (155) during the mass production process of the electronic device (100). That is, the inverted image based on the second keystone information may be displayed within the guide line (221) of the mirror (220), as in 1310 of FIG. 13.

[0152] However, keystone correction may be required due to wear or deformation, etc. For example, even if the processor (130) projects an inverted image generated from content based on the second keystone information, as shown in 1410 of FIG. 14, the inverted image may be displayed in a distorted form within the guide line (221) of the mirror (220), and in this case, the screen may also be output in a distorted form on the projection surface, as shown in 1420.

[0153] To solve this problem, the other electronic device (200) further includes a camera, and the processor (230) can capture a projection surface through the camera to obtain a captured image and transmit the captured image to the electronic device (100). The processor (130) can update the second keystone information based on the captured image received from the other electronic device (200), and control the projection unit (110) to project an inverted image generated from the content based on the updated second keystone information.

[0154] FIG. 15 is a drawing for explaining a method for keystone correction of a projection angle for a projection surface of another electronic device (200) according to one embodiment of the present disclosure.

[0155] If the projection angle for the projection surface of another electronic device (200) is a preset angle, as shown on the left side of Fig. 15, the screen on the projection surface may have a rectangular shape, as shown in 1510. However, if the projection angle for the projection surface of another electronic device (200) is not a preset angle, as shown on the right side of Fig. 15, the screen on the projection surface may have a trapezoidal shape, as shown in 1520.

[0156] To solve this problem, the electronic device (200) further includes a camera, and the processor (230) can capture a projection surface through the camera to obtain a captured image and transmit the captured image to the electronic device (100).

[0157] The processor (130) can update the second keystone information based on the captured image received from another electronic device (200) and control the projection unit (110) to project an inverted image generated from the content based on the updated second keystone information.

[0158] Through this action, a rectangular screen can be provided even if the projection angle for the projection surface of another electronic device (200) is not a preset angle.

[0159] FIG. 16 and FIG. 17 are drawings for explaining a method of utilizing an electronic system (1000) according to one embodiment of the present disclosure.

[0160] The electronic device (100) connected to another electronic device (200) can be placed parallel to the floor and use the wall (1610) as a projection surface, as illustrated in FIG. 16. In this case, the user can view the image on the wall (1610).

[0161] Alternatively, the electronic device (100) connected to another electronic device (200) may be placed on the floor and use the floor surface (1710) as a projection surface, as illustrated in FIG. 17. In this case, the user can view the image on the floor surface (1710).

[0162] FIG. 18 is a flowchart for explaining a control method of an electronic device according to an embodiment of the present disclosure.

[0163] First, the connection of the electronic device and other electronic devices that change the optical path of the electronic device are identified (S1810). Then, if the electronic device is not connected to the other electronic device, an image generated from the content is projected based on the first keystone information, and if the electronic device is connected to the other electronic device, an inverted image generated from the content is projected based on the second keystone information (S1820).

[0164] Additionally, the identifying step (S1810) can identify the electronic device as being connected to the other electronic device when the first orientation information of the other electronic device is received from the other electronic device.

[0165] And, the method may further include a step of obtaining second orientation information of the electronic device, a step of obtaining information for adjusting a mounting state of the electronic device with respect to another electronic device based on the first orientation information and the second orientation information, and a step of transmitting the obtained information to the other electronic device.

[0166] In addition, each of the first orientation information and the second orientation information includes information on one of yaw, pitch, and roll, and the step of obtaining information for adjusting the mounting state may compare information included in the first orientation information and information included in the second orientation information to obtain information on the rotation direction of the electronic device as information for adjusting the mounting state.

[0167] And, in the projecting step (S1820), when the electronic device is connected to another electronic device and power is supplied from the other electronic device, the reverse image can be projected onto a mirror included in the other electronic device.

[0168] Additionally, the method may further include a step of acquiring a first photographed image in which a mirror is photographed, and a step of acquiring second keystone information based on the first photographed image so that an inverted image is projected within a guide line displayed on the mirror.

[0169] And, the electronic device is a projector that requires a projection distance greater than a preset first distance, and the mirror reflects light output from the electronic device to a projection surface less than a preset second distance from the other electronic device while the electronic device is connected to another electronic device, and the preset first distance may be greater than the preset second distance.

[0170] In addition, the method further includes a step of receiving a second captured image from another electronic device and a step of obtaining second keystone information based on the second captured image, wherein light output through the electronic device is reflected onto a projection surface through a mirror included in the other electronic device, and the second captured image may be an image of the projection surface being captured.

[0171] According to various embodiments of the present disclosure, the electronic device can operate in a first mode, projecting an image corresponding to the content, or in a second mode, projecting an inverted image corresponding to the content, based on whether the electronic device is connected to another electronic device, thereby providing the user with a variety of choices. In particular, when the electronic device operates in the second mode, spatial constraints can be overcome, thereby enhancing user convenience.

[0172] Meanwhile, according to a temporary example of the present disclosure, the various embodiments described above can be implemented as software including instructions stored in a machine-readable storage medium that can be read by a machine (e.g., a computer). The device is a device that can call instructions stored from the storage medium and operate according to the called instructions, and may include an electronic device (e.g., electronic device (A)) according to the disclosed embodiments. When an instruction is executed by a processor, the processor can perform a function corresponding to the instruction directly or by using other components under the control of the processor. The instruction may include code generated or executed by a compiler or interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' means that the storage medium does not contain a signal and is tangible, but does not distinguish between data being stored semi-permanently or temporarily in the storage medium.

[0173] Furthermore, according to one embodiment of the present disclosure, the method according to the various embodiments described above may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or online through an application store (e.g., Play Store™). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0174] Furthermore, according to one embodiment of the present disclosure, the various embodiments described above may be implemented in a computer-readable recording medium or a similar device using software, hardware, or a combination thereof. In some cases, the embodiments described herein may be implemented by the processor itself. In a software implementation, embodiments such as the procedures and functions described herein may be implemented as separate software. Each software may perform one or more functions and operations described herein.

[0175] Meanwhile, computer instructions for performing processing operations of a device according to the various embodiments described above may be stored in a non-transitory computer-readable medium. The computer instructions stored in such a non-transitory computer-readable medium, when executed by a processor of a specific device, cause the specific device to perform processing operations in the device according to the various embodiments described above. A non-transitory computer-readable medium refers to a medium that permanently stores data and can be read by a device, rather than a medium that stores data for a short period of time, such as a register, cache, or memory. Specific examples of non-transitory computer-readable media may include a CD, DVD, hard disk, Blu-ray disk, USB, memory card, or ROM.

[0176] In addition, each of the components (e.g., modules or programs) according to the various embodiments described above may be composed of a single or multiple entities, and some of the corresponding sub-components described above may be omitted, or other sub-components may be further included in various embodiments. Alternatively or additionally, some components (e.g., modules or programs) may be integrated into a single entity, which may perform the same or similar functions as those performed by each of the corresponding components prior to integration. Operations performed by modules, programs or other components according to various embodiments may be executed sequentially, in parallel, iteratively or heuristically, or at least some operations may be executed in a different order, omitted, or other operations may be added.

[0177] Although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person having ordinary skill in the art to which the present disclosure pertains without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical idea or prospect of the present disclosure.

Claims

1. In electronic devices, Projection section; An interface connecting to another electronic device that changes the optical path of the electronic device; and one or more processors connected to the projection unit and the interface to control the electronic device; The above processor, Identifying whether the electronic device and the other electronic device are connected through the interface, An electronic device that projects an image generated from content based on first keystone information when the electronic device is not connected to the other electronic device, and controls the projection unit to project an inverted image generated from the content based on second keystone information when the electronic device is connected to the other electronic device.

2. In paragraph 1, further comprising a communication interface; The above processor, An electronic device, wherein when first orientation information of the other electronic device is received from the other electronic device through the communication interface, the electronic device identifies the other electronic device as being connected to the other electronic device.

3. In paragraph 2, including sensors; The above processor, Obtaining second orientation information of the electronic device through the sensor, Obtaining information for adjusting the mounting state of the electronic device with respect to the other electronic device based on the first orientation information and the second orientation information; An electronic device that controls the communication interface to transmit the acquired information to the other electronic device.

4. In paragraph 3, Each of the above first orientation information and the above second orientation information, Contains information about one of yaw, pitch, and roll, The above processor, An electronic device that obtains information on the rotation direction of the electronic device as information for adjusting the mounting state by comparing information included in the first orientation information and information included in the second orientation information.

5. In paragraph 1, The above processor, An electronic device that controls the projection unit to project the inverted image onto a mirror included in the other electronic device when the electronic device is connected to the other electronic device and power is supplied from the other electronic device through the interface.

6. In paragraph 5, Includes a camera; The above processor, Obtaining a first photographed image of the mirror through the camera, An electronic device that obtains the second keystone information so that the inverted image is projected within the guide line displayed on the mirror based on the first captured image.

7. In paragraph 5, The above electronic device, A projector that requires a projection distance greater than the preset first distance, The above mirror, The electronic device reflects the light output from the projection unit to a projection surface less than a second preset distance from the other electronic device while the electronic device is connected to the other electronic device, The above preset first distance is, An electronic device greater than the above-described second distance.

8. In paragraph 1, further comprising a communication interface; The above processor, Receive a second captured image from the other electronic device through the communication interface, Obtaining the second keystone information based on the second photographed image, The light output through the above projection unit is It is reflected onto the projection surface through the mirror included in the above electronic device, The above second shooting image is, An electronic device in which the above projection surface is a photographed image.

9. In paragraph 1, including sensors; The above processor, Obtaining second orientation information of the electronic device through the sensor, An electronic device that controls the projection unit to project a left-right inverted image or an up-down-left-right inverted image generated from the content based on the second orientation information.

10. In a method for controlling an electronic device, A step of identifying whether the electronic device and another electronic device that changes the optical path of the electronic device are connected; and A control method comprising: a step of projecting an image generated from content based on first keystone information when the electronic device is not connected to the other electronic device, and a step of projecting an inverted image generated from the content based on second keystone information when the electronic device is connected to the other electronic device.

11. In paragraph 10, The above identifying step is, A control method, wherein when first orientation information of the other electronic device is received from the other electronic device, the electronic device is identified as being connected to the other electronic device.

12. In paragraph 11, A step of obtaining second orientation information of the electronic device; A step of obtaining information for adjusting the mounting state of the electronic device with respect to the other electronic device based on the first orientation information and the second orientation information; and A control method further comprising a step of transmitting the acquired information to the other electronic device.

13. In paragraph 12, Each of the above first orientation information and the above second orientation information, Contains information about one of yaw, pitch, and roll, The step of obtaining information for adjusting the above-mentioned holding state is: A control method for obtaining information on the rotation direction of the electronic device as information for adjusting the mounting state by comparing information included in the first orientation information and information included in the second orientation information.

14. In paragraph 10, The above projection step is, A control method for projecting the inverted image onto a mirror included in the other electronic device when the electronic device is connected to the other electronic device and power is supplied from the other electronic device.

15. In paragraph 14, A step of obtaining a first photographed image in which the mirror is photographed; and A control method further comprising: a step of obtaining the second keystone information so that the inverted image is projected within the guide line displayed on the mirror based on the first photographed image.

Images