CN114650404A

CN114650404A - Projection equipment and projection display method

Info

Publication number: CN114650404A
Application number: CN202210332154.5A
Authority: CN
Inventors: 刘芸; 刘秀红
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-06-21

Abstract

The embodiment of the application provides a projection device and a projection display method, relates to the technical field of projection, and is used for improving the matching degree between the brightness change trend and a standard electro-optic transfer function curve when the projection device is matched with a non-default projection screen. The projection device includes: the projection assembly is used for projecting an image to be projected onto a projection screen; a controller coupled to the projection assembly and configured to: acquiring the size of a target projection screen; determining brightness adjusting parameters according to the size of the target projection screen and the size of the default projection screen; determining the screen display brightness of the target projection screen according to the brightness adjusting parameter and the screen display brightness of the default projection screen; and controlling the projection assembly to display the image after performing brightness mapping on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen.

Description

Projection equipment and projection display method

Technical Field

The present application relates to the field of projection technologies, and in particular, to a projection device and a projection display method.

Background

With the development of electronic technology, the application of projection equipment is more and more extensive, and the main working scenes of the projection equipment are teaching, demonstration, entertainment, work and the like. In order to optimize the display effect of the projection device, the projection device may display an image by using a High Dynamic Range (HDR) technology. The HDR technology can expand the brightness range of a display image, reveal details of bright portions and details of dark portions in the display image, and bring richer colors and more vivid and natural detailed expressions to the display image, so that the display image is closer to the human eye.

At present, projection equipment and a projection screen are separated, when the projection equipment is matched with a default projection screen, the brightness change trend can be matched with a standard electro-optic transfer function curve, and bright part details and dark part details in a display image can be well displayed. However, when the projection apparatus is matched with a non-default projection screen, the matching degree between the brightness variation trend and the standard electro-optical transfer function (EOTF) curve is low, and the problems of dark scene detail loss or high brightness saturation and the like are easily caused, that is, the situation of over-dark or over-bright occurs, thereby affecting the viewing experience of the user.

Disclosure of Invention

The embodiment of the application provides a projection device and a projection display method, which are used for improving the matching degree between the brightness change trend and a standard electro-optic transfer function curve when the projection device is matched with a non-default projection screen.

In a first aspect, an embodiment of the present application provides a projection apparatus, including:

the projection assembly is used for projecting an image to be projected onto a projection screen;

a controller coupled to the projection assembly and configured to:

acquiring the size of a target projection screen;

determining brightness adjusting parameters according to the size of the target projection screen and the size of the default projection screen;

determining the screen display brightness of the target projection screen according to the brightness adjusting parameter and the screen display brightness of the default projection screen;

and controlling the projection assembly to display the image after performing brightness mapping on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen.

The technical scheme provided by the embodiment of the application at least has the following beneficial effects: aiming at the problem that when the projection equipment is matched with a non-default projection screen, the matching degree between the brightness change trend and the standard electro-optic transfer function curve is low, the projection equipment provided by the embodiment of the application firstly obtains the size of the target projection screen, so that the understanding is easy, if the size of the target projection screen is inconsistent with the size of the default screen, namely the target projection screen is not the default screen, the display brightness of the target projection screen needs to be determined, and the size of the projection screen and the screen display brightness have a corresponding relation. The brightness adjusting parameters can be determined according to the size of the target projection screen and the size of the default projection screen, and then the screen display brightness of the target projection screen is determined according to the brightness adjusting parameters and the screen display brightness of the default projection screen. And after the screen display brightness of the target projection screen is determined, the projection component is controlled to display the image after the brightness mapping is carried out on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen.

Therefore, the controller performs brightness mapping on the high dynamic range image to be displayed according to the determined screen display brightness of the target projection screen, but does not perform brightness mapping on the high dynamic range image to be displayed according to the default display brightness of the projection screen, and the matching degree between the brightness change trend and the standard electro-optic transfer function curve is improved.

In a second aspect, an embodiment of the present application provides a projection display method, including:

acquiring the size of a target projection screen;

and according to the screen display brightness of the target projection screen, performing brightness mapping on the high dynamic range image to be displayed and then performing image display.

In a third aspect, an embodiment of the present application provides a controller, including: one or more processors; one or more memories; wherein the one or more memories are configured to store computer program code comprising computer instructions which, when executed by the one or more processors, cause the controller to perform any of the projection display methods provided by the second aspect.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, which includes computer instructions, when the computer instructions are executed on a computer, the computer executes any one of the projection display methods provided in the second aspect.

In a fifth aspect, embodiments of the present invention provide a computer program product, which is directly loadable into a memory and contains software codes, and which, when loaded and executed by a computer, is capable of implementing any one of the projection display methods as provided in the second aspect.

It should be noted that all or part of the computer instructions may be stored on the computer readable storage medium. The computer readable storage medium may be packaged with or separately from a processor of the controller, which is not limited in this application.

The beneficial effects described in the second aspect to the fifth aspect in the present application may refer to the beneficial effect analysis of the first aspect, and are not described herein again.

Drawings

FIG. 1 is a diagram illustrating a comparison between a luminance variation trend and a standard EOTF curve provided in an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating another luminance variation trend comparison with a standard EOTF curve provided in the embodiments of the present application;

FIG. 3 is a schematic diagram illustrating another luminance variation trend comparison with a standard EOTF curve provided in the embodiments of the present application;

FIG. 4 is a schematic diagram of a projection system according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a projection apparatus according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram illustrating a projection module according to an embodiment of the present disclosure;

fig. 7 is a block diagram of a hardware configuration of a projection apparatus according to an embodiment of the present disclosure;

fig. 8 is a schematic composition diagram of a camera module according to an embodiment of the present disclosure;

fig. 9 is a schematic view of an application scenario of a projection apparatus according to an embodiment of the present application;

fig. 10 is a schematic diagram of a hardware architecture of a mobile phone according to an embodiment of the present application;

fig. 11 is a flowchart of a projection display method according to an embodiment of the present application;

fig. 12 is a flowchart of another projection display method provided in the embodiment of the present application;

fig. 13 is a schematic view of a display interface of a terminal device according to an embodiment of the present application;

fig. 14 is a schematic view of a display interface of another terminal device according to the embodiment of the present application;

fig. 15 is a flowchart of another projection display method provided in the embodiment of the present application;

fig. 16 is a schematic hardware structure diagram of a controller according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. In addition, when a pipeline is described, the terms "connected" and "connected" are used in this application to have a meaning of conducting. The specific meaning is to be understood in conjunction with the context.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

With the popularization of laser projection display products, the laser projection products begin to replace televisions to go into thousands of households. Currently, mainstream laser projection equipment mainly comprises two display modes, one mode is that a monochromatic laser is adopted to cooperate with a color wheel to perform time-sharing display, and the other mode is that a three-color laser is adopted to perform three-primary-color display. Laser projection devices as an alternative to televisions have much higher requirements in terms of display effects such as brightness and color rendering than the requirements of ordinary projection products. In order to achieve a better display effect, current laser projection apparatuses often cooperate with HDR technology to display images.

When the HDR image is processed by the processor, it can theoretically be restored by a complete EOTF curve, but considering the actual situation of the display brightness of the terminal display screen, when many HDR images are produced in the post-production, the maximum brightness is not produced by 10000 nit (nit), and is often produced to be 1000nit-4000nit, and meanwhile, since the maximum display brightness of most liquid crystal screens is mainly concentrated below 1000nit, and the signal processing is mainly a Standard Dynamic Range (SDR) mode, there will be a mapping (mapping) process, that is, the maximum brightness of the HDR image corresponds to the maximum display brightness of the display screen, so as to achieve the best display effect

Since the luminance range of an HDR image is usually larger than that of a display, a tone mapping (tone mapping) needs to be performed on the HDR image before image display is performed, and the resulting luminance variation trend (which may also be referred to as a luminance mapping curve) needs to be matched with the EOTF curve. In general, matching can be done with the standard EOTF (ST2084) curve.

At present, brightness mapping is performed on the HDR image by a projection device before image display according to the screen display brightness of a default projection screen, however, when the size of the projection screen is switched, because the screen display brightness of the projection screens with different sizes changes greatly, if brightness mapping is performed by using the screen display brightness of the default projection screen, the brightness mapping cannot be matched with a standard EOTF curve, so that the problem of dark field detail loss or high brightness saturation is caused, the advantages of the HDR technology cannot be brought into play, and the viewing experience of a user is influenced.

For example, as shown in fig. 1, a schematic diagram illustrating a comparison between a luminance variation trend obtained by luminance mapping when a projection apparatus provided by an embodiment of the present application is collocated with a default projection screen and a standard EOTF curve is shown, where the comparison is performed. As can be seen from fig. 1, when the projection apparatus is matched with a default projection screen, the brightness variation trend obtained when the brightness mapping is performed with the default screen display brightness can match with the standard EOTF curve.

For example, as shown in fig. 2, a schematic diagram illustrating a comparison between a luminance change trend obtained by luminance mapping when a non-default projection screen is collocated with a projection device provided in the embodiment of the present application and a standard EOTF curve is shown. For example, assuming that the size of the collocated non-default projection screen is smaller than the size of the default projection screen, as can be seen from fig. 2, if the matching degree between the luminance variation trend obtained by luminance mapping with the default screen display luminance and the standard EOTF curve is lower, a higher luminance is displayed at the same gray level, thereby causing a problem of high luminance saturation.

For example, as shown in fig. 3, a schematic diagram illustrating a comparison between a luminance change trend obtained by performing luminance mapping when a non-default projection screen is collocated with a projection device according to an embodiment of the present application and a standard EOTF curve is shown. For example, assuming that the size of the collocated non-default projection screen is larger than the size of the default projection screen, as can be seen from fig. 3, if the matching degree between the luminance change trend standard EOTF curves obtained by luminance mapping with the default screen display luminance is lower, the luminance is displayed at the same gray level, and therefore the dark field details disappear.

Based on this, an embodiment of the present application provides a projection display method, where when a size of a target projection screen is a size of a non-default projection screen, a screen display brightness of the target projection screen is determined according to a proportional relationship between the size of the target projection screen and the size of the default projection screen and a screen display brightness of the default projection screen, and then, an image display is performed after brightness mapping is performed on a high dynamic range image to be displayed according to the screen display brightness of the target projection screen. Therefore, brightness mapping is not needed to be carried out on the high dynamic range image to be displayed according to the default screen display brightness of the projection screen, and the matching degree between the brightness change trend and the standard electro-optic transfer function curve is improved.

Fig. 4 is a schematic diagram illustrating a projection system according to an exemplary embodiment of the present application. As shown in fig. 4, the projection system includes a projection device 100 and a projection screen 200.

As shown in fig. 4, the light outlet of the projection device 100 faces the projection screen, and the projection device 100 may emit a light beam to the projection screen 200, and the projection screen 200 is configured to reflect the light beam to implement display of a picture.

Among them, the projection apparatus 100 may refer to an apparatus having a projection function. As an example, it may be a desktop projector, a portable projector, a floor-type projector, a reflective projector, a transmissive projector, a single-function projector, a multi-function projector, an intelligent projector, or a touch interactive projector, etc. Of course, projection device 100 may also have other names, such as projection host, projector, etc.

Optionally, the projection apparatus 100 may be a rectangular parallelepiped, a prism, a sphere, a desk lamp, and the like, and the embodiment of the present application is not limited as long as the projection apparatus has a projection function.

Optionally, the projection apparatus 100 may be a projection apparatus with a set of projection lenses, or may also be a projection apparatus with a plurality of sets of projection lenses, where the images projected by the plurality of sets of projection lenses are overlapped in edge, and can be displayed as a complete projection image through a fusion technique.

Fig. 5 is a schematic structural diagram of a projection apparatus 100 according to an exemplary embodiment of the present application, and the projection apparatus 100 will be described with reference to fig. 4 and 5. The projection apparatus 100 includes: projection assembly 110, controller 120. Projection assembly 110 is coupled to controller 120. It should be understood that fig. 5 only shows some of the components of projection device 100, and that other components of projection device 100 not shown may also be present.

The projection module 110 is configured to emit light to project a picture on the projection screen 200.

Optionally, as shown in fig. 6, the projection assembly 110 may include a light source 111, a projection lens 112, and an optical engine 113. The light source 111 is configured to output light of N primary colors, where N is an integer greater than 1.

In practical use, the light source 111 may output light beams with N primary colors to the optical engine 113, and the optical engine 113 further modulates the light beams with N primary colors according to the image to be projected, so as to obtain the light beam to be projected. Further, the projection lens 112 may project the projection light beam from the light outlet to form a projection picture on the projection screen 200.

In some examples, the light source 111 may be a monochromatic light source, which may include a blue laser. In this case, the light source 111 may further include a fluorescent wheel and/or a color filter wheel to ensure that the laser beam emitted by the light source 111 may be a red, green and blue light beam. However, the light source 111 may not include at least one of the fluorescent wheel or the color filter wheel, but in order to ensure the projection effect of the projection device, the fluorescent wheel and/or the color filter wheel may be included in the light engine 113 of the projection device. The fluorescence wheel can be excited to fluoresce.

In other examples, light source 111 is a multi-color light source. For example, the multicolor light source includes a three-color laser chip or three sets of monochromatic lasers integrated in one package unit. Illustratively, the three sets of monochromatic lasers may include a set of green lasers, a set of red lasers, and a set of blue lasers. Each set of lasers may include one or more lasers. In this way, the light source 111 can be made to directly emit light beams of three colors of red, green, and blue.

Alternatively, the light source 111 may be other types of light sources other than a laser.

In some embodiments, projection lens 112 is used to project an image to be projected. The projection lens 112 may be a zoom lens, a fixed focus variable lens, or a fixed focus lens. So that projection device 100 may be an ultra-short focus projection device, a short focus projection device, or a long focus projection device. For example, when the projection apparatus 100 is an ultra-short-focus projection apparatus, the projection lens 112 is an ultra-short-focus projection lens, and the projection ratio of the projection lens 112 is usually less than 0.3, such as 0.24.

In some embodiments, the optical engine 113 may be configured to modulate the light beams of different colors according to the current image display signal to obtain the projection light beams. The optical engine 113 may be an optical engine based on a Digital Light Processing (DLP) or Liquid Crystal Display (LCD) projection technology.

In some embodiments, the optical machine 113 may be configured to operate according to an operating current value indicated by a control signal sent by the controller 120.

In some embodiments, the controller 120 refers to a device that can generate an operation control signal according to the instruction operation code and the timing signal, and instruct the laundry treating apparatus 100 to execute the control instruction. Illustratively, the controller 120 may be a Central Processing Unit (CPU), a general purpose processor Network Processor (NP), a Digital Signal Processor (DSP), a microprocessor, a microcontroller, a Programmable Logic Device (PLD), or any combination thereof. The controller 120 may also be other devices with processing functions, such as a circuit, a device, or a software module, which is not limited in any way by the embodiments of the present application.

In addition, the controller 120 may be configured to control operations of various components within the interior of the projection device 100, so that the various components of the projection device 100 operate to implement various predetermined functions of the projection device.

In some embodiments, projection device 100 also has attached to it a remote control having functionality to communicate with controller 120, for example, using infrared or other communication means. The remote control is used for various controls that the user may have over the projection device, enabling interaction between the user and the projection device 100.

Alternatively, as shown in the hardware configuration block diagram of the projection apparatus 100 in fig. 7, the projection apparatus 100 may further include: camera assembly 130, communicator 140, interface unit 150, memory 160, and other units. These components may communicate over one or more communication buses or signal lines (not shown in fig. 7).

In some embodiments, camera assembly 130 is used to capture images of the environment in which projection device 100 is located.

For example, as shown in fig. 8, the camera assembly 130 may include a camera 1301, an image recognition module 1302, and the like, where the camera 1301 is configured to photograph an image within a viewing angle range of the camera to obtain a corresponding image, and may specifically be a monocular camera or a monocular camera, and may also be a monocular camera, which is determined according to actual requirements. The image recognition module 1302 may be a dedicated image processing chip connected to the camera 1301, which may be used to implement the following functions: and identifying the size of the projection screen shot by the camera.

In some embodiments, the communicator 140 is configured to establish a communication connection with other network entities, such as a terminal device. The communicator 140 may include a Radio Frequency (RF) module, a cellular module, a wireless fidelity (WIFI) module, a GPS module, and the like. Taking the RF module as an example, the RF module can be used for receiving and transmitting signals, and particularly, transmitting the received information to the controller 120 for processing; in addition, the signal generated by the controller 120 is transmitted. In general, the RF circuit may include, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like.

For example, the projection device 100 may interact with other devices through the communicator 140, such as receiving a picture to be projected sent by other terminal devices or a base station. At this time, the communicator 140 may be used for connection between the projection device and other terminal devices or base stations to implement reception and transmission of signals, and may deliver the received data to the controller 120 for processing.

For example, the projection device 100 may receive a control instruction sent by a terminal device through the communicator 140, and perform corresponding processing according to the control instruction, so as to implement interaction between a user and the projection device 100.

An interface unit 150 for providing various interfaces for external input/output devices (e.g., a keyboard, a mouse, an external display, an external memory, a sim card, etc.). For example, the Communication function is implemented by connecting a mouse or a display through a Universal Serial Bus (USB) interface, connecting a Subscriber Identity Module (SIM) card provided by a telecommunications carrier through a metal contact on a card slot of the SIM card, and connecting the Communication function to other terminals through an interface of the communicator 140, an interface of a Near Field Communication (NFC) device, an interface of a bluetooth Module, and the like.

Memory 160 may be used to store software programs and data. The controller 120 performs various functions of the projection apparatus 100 and data processing by executing software programs or data stored in the memory 160. The memory 160 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Memory 160 stores an operating system that enables projection device 100 to operate. The memory 160 may store an operating system and various application programs, and may also store codes for performing the brightness adjustment method of the projection apparatus provided in the embodiments of the present application.

Optionally, the projection device 100 may further include an audio circuit, a speaker, a microphone, bluetooth, a Near Field Communication (NFC) device, and the like, which are not described herein again.

Those skilled in the art will appreciate that the hardware configuration shown in fig. 7 does not constitute a limitation of the projection device, which may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.

Fig. 9 is a schematic application scenario diagram of a projection device according to an exemplary embodiment of the present application. As shown in fig. 9, the application scenario includes a projection device 100, a projection screen 200, and a terminal device 300.

In some embodiments, the application scenario may include a plurality of terminal devices 300, and the number of terminal devices is not limited in the embodiments of the present application.

By way of example, the terminal device 300 in the embodiment of the present application may be any form of mobile terminal. Such as cell phones, tablet computers, desktop computers, laptop computers, handheld computers, notebook computers, ultra-mobile personal computers (UMPC), netbooks, and cellular phones, Personal Digital Assistants (PDA), Augmented Reality (AR) \ Virtual Reality (VR) devices, and the like.

Taking the terminal device 300 in the embodiment of the present application as an example of a mobile phone, a general hardware architecture of the mobile phone is described below with reference to fig. 10.

Fig. 10 is a schematic diagram of a hardware architecture of a mobile phone according to an exemplary embodiment of the present application. As shown in fig. 10, the mobile phone may specifically include: controller 301, Radio Frequency (RF) circuitry 302, memory 303, touch screen 304, communicator 305, camera assembly 306, Wi-Fi device 307, pointing device 308, audio circuitry 309, and power supply 310. These components may communicate over one or more communication buses or signal lines (not shown in fig. 10). Those skilled in the art will appreciate that the hardware configuration shown in fig. 10 is not intended to be limiting, as the handset may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The controller 301 is a control center of the mobile phone, connects various parts of the mobile phone by using various interfaces and lines, and executes various functions of the mobile phone and processes data by running or executing an application program (hereinafter, may be abbreviated as App) stored in the memory 303 and calling data stored in the memory 303. In some embodiments, the controller 301 may include one or more processing units.

The rf circuit 302 may be used for receiving and transmitting wireless signals during the transmission and reception of information or a call. In particular, the rf circuit 302 may receive downlink data of the base station and then process the received downlink data to the controller 301; in addition, data relating to uplink is transmitted to the base station. Typically, the radio frequency circuitry includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency circuit 302 may also communicate with other devices via wireless communication. The wireless communication may use any communication standard or protocol including, but not limited to, global system for mobile communications, general packet radio service, code division multiple access, wideband code division multiple access, long term evolution, email, short message service, and the like.

The memory 303 is used to store application programs and data, and the controller 301 executes various functions and data processing of the mobile phone by operating the application programs and data stored in the memory 303. The memory 303 mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system and an application program (such as a sound playing function and an image playing function) required by at least one function; the storage data area may store data (such as audio data, a phonebook, etc.) created when the mobile phone is used. Further, the memory 303 may include high speed random access memory, and may also include non-volatile memory, such as a magnetic disk storage device, a flash memory device, or other volatile solid state storage device.

The touch screen 304 may include a touch pad 304-1 and a display 304-2. Wherein the touch pad 304-1 may capture touch events of a user of the cell phone on or near the touch pad 304-1 (e.g., user operation of any suitable object on or near the touch pad 304-1 using a finger, a stylus, etc.) and transmit the captured touch information to other devices, such as the controller 301.

The communicator 305 is configured to establish a communication connection with other network entities, for example, with other terminal devices.

In some embodiments, communicator 305 is used to establish a communication connection with a projection device.

The camera component 306 can be a camera (front camera and/or rear camera) for capturing images of the environment in which the terminal device is located.

The Wi-Fi device 307 is used for providing network access for the mobile phone according to Wi-Fi related standard protocols, the mobile phone can be accessed to the Wi-Fi access point through the Wi-Fi device 307, and therefore the mobile phone helps a user to receive and send emails, browse webpages, access streaming media and the like, and wireless broadband internet access is provided for the user. In other embodiments, the Wi-Fi device 307 may also act as a Wi-Fi wireless access point, and may provide Wi-Fi network access to other terminals.

And a positioning device 308 for providing a geographic position for the mobile phone. It is understood that the positioning device 308 may be a receiver of a positioning system such as Global Positioning System (GPS) or beidou satellite navigation system, GLONASS, etc.

The audio circuitry 309, speaker 311, microphone 312 may provide an audio interface between the user and the handset. The audio circuit 309 may transmit the electrical signal converted from the received audio data to the speaker 311, and the electrical signal is converted into a sound signal by the speaker 311 and output; on the other hand, the microphone 312 converts the collected sound signals into electrical signals, which are received by the audio circuit 309 and converted into audio data, which is then output to the RF circuit 302 for transmission to, for example, another cell phone, or to the memory 303 for further processing.

The mobile phone may further include a power supply device 310 (such as a battery and a power management chip) for supplying power to each component, and the battery may be logically connected to the controller 301 through the power management chip, so as to implement functions of managing charging, discharging, and power consumption through the power supply device.

Although not shown in fig. 10, the mobile phone may further include a flash, a micro-projection device, a Near Field Communication (NFC) device, etc., which are not described in detail herein.

In some embodiments, as shown in fig. 11, the present application provides a projection display method, applied to the controller 120 shown in fig. 5, and the method includes the following steps:

s101, obtaining the size of a target projection screen.

Wherein the target projection screen is the projection screen that the user is currently going to watch.

Optionally, as shown in fig. 12, step S101 may be implemented as the following steps:

and S1011, receiving a selection instruction of the user for the size of the target projection screen.

It is to be understood that, in the case where the user confirms the size of the target projection screen, the controller may receive a user selection instruction for the size of the target projection screen. Wherein the selection instruction indicates the size of the target projection screen.

For example, the controller receiving a user selection instruction of the size of the target projection screen may include one or more of the following situations.

In case 1, the controller may receive a selection instruction of the size of the target projection screen sent by the user to the projection apparatus through the remote controller of the projection apparatus.

For example, a user may send a selection instruction of the size of the target projection screen to the projection device by operating a remote controller of the projection device, and the controller receives the selection instruction of the size of the target projection screen from the user.

In case 2, the controller may receive a selection instruction of the size of the target projection screen, which is transmitted to the projection apparatus through the terminal device by the user, through the communicator.

For example, assume that a projection Application (APP) capable of controlling the projection device is loaded on or off the terminal device, as shown in fig. 13, application icons such as "email", "camera", "setting", "calculator", "projection APP", "weather", "photo", and "other" may be displayed on a display interface of a display of the terminal device. The user can enter the control interface of the projection APP by clicking the application icon of the projection APP displayed on the display of the terminal equipment. And the terminal equipment responds to the operation that the user clicks the application icon of the projection APP and controls the display to display the control interface of the projection APP. Function options of functions such as 'power on', 'power off', 'screen size selection' and 'other' can be displayed on the control interface of the projection APP. As shown in fig. 14, assuming that the user selects the function option of the "screen size selection" function, the terminal device receives an operation of the user to click the function option of the "screen size selection" function, and in response to the operation, controls the display to display a control interface of the "screen size selection". The control interface of the screen size selection can display two options of plus and minus, wherein plus corresponds to increasing the screen size, and minus corresponds to decreasing the screen size. The rectangular box between "+" and "-" is used to display the screen size selected by the user, e.g., 70 inches.

And after receiving a size selection instruction of a user, the terminal equipment sends the size selection instruction to the projection equipment. Further, the controller receives a selection instruction of the size through the communicator.

And S1012, responding to the selection instruction, and determining the size of the target projection screen.

For the above cases 1 and 2, the controller determines the size of the target projection screen in response to the selection instruction of the size.

Optionally, as shown in fig. 15, step S101 may also be specifically implemented as the following steps:

and S1013, shooting the target projection screen to acquire an image of the target projection screen.

As can be seen from the above description of the projection apparatus in fig. 7, the projection apparatus may be configured with a camera assembly, and the controller may capture an image of the target projection screen through a camera in the camera assembly to obtain the image of the target projection screen.

In some embodiments, when the user selects to use the projection device, the projection device receives a power-on instruction of the user. And responding to the starting instruction, and controlling the projection assembly to shoot the target projection screen by the controller to obtain an image of the target projection screen.

In some embodiments, a user configures a projection device with multiple projection screens. In the process that a user watches the projection screen of the projection equipment, if the user selects to replace the projection screen currently in use, after the user replaces the projection screen currently in use, the projection equipment receives a projection screen replacement instruction of the user. In response to the command for replacing the projection screen, the controller controls the projection assembly to shoot the target projection screen to obtain an image of the target projection screen.

And S1014, determining the size of the target projection screen according to the image of the target projection screen.

After the image of the target projection screen is obtained, the size of the image of the target projection screen can be identified through an image identification module of the camera shooting assembly, so that the size of the target projection screen can be determined.

In some embodiments, a trained projection screen size recognition model is pre-configured in the image recognition module of the camera assembly, and after the camera of the camera assembly acquires the image of the target projection screen, the image recognition module of the camera assembly may input the image of the target projection screen into the trained projection screen size recognition model to obtain the size of the target projection screen, and then send the obtained size of the target projection screen to the controller.

Alternatively, the projection screen size recognition model may be implemented by various algorithms. For example, a traditional projection screen size recognition model based on a machine learning algorithm is obtained by using a Support Vector Machine (SVM) algorithm, a gradient boosting iterative decision tree (GBDT) algorithm, a random forest algorithm (RF) algorithm, and the like, and a projection screen size recognition model based on a deep learning can also be obtained by using a Convolutional Neural Network (CNN) algorithm, a Recurrent Neural Network (RNN) algorithm, and a long-term short-memory network (LSTM) algorithm.

It is easy to understand that the deep convolutional neural network can automatically extract and learn more essential features in the data in massive training data, and the deep convolutional neural network is applied to the identification of the size of the projection screen, so that the classification effect is obviously enhanced, and the accuracy of the identification of the size of the projection screen is further improved.

S102, determining brightness adjusting parameters according to the size of the target projection screen and the size of the default projection screen.

The size of the default projection screen may be an initial projection screen preset when the projection device is shipped from a factory, or may be set by a user of the projection device during the process of using the projection device, for example, 100 inches.

Illustratively, the brightness adjustment parameter satisfies the following formula (1):

wherein G is_nFor the brightness adjustment parameter, S _ def ault is the default projection screen size, S_nN is a positive integer for the size of the target projection screen.

In some embodiments, the quotient of the size of the target projection screen and the size of the default projection screen may also be used as the brightness adjustment parameter.

In some embodiments, if the size of the target projection screen is consistent with the size of the default projection screen, the screen display brightness of the default projection screen may be used as the screen display brightness of the target projection screen, and then the image display is performed after the brightness mapping is performed on the high dynamic range image to be displayed with the screen display brightness of the default projection screen.

S103, determining the screen display brightness of the target projection screen according to the brightness adjusting parameter and the screen display brightness of the default projection screen.

The screen display brightness of the default projection screen may be an initial screen display brightness preset by the projection device when the projection device leaves a factory, or may be set by a user of the projection device during the process of using the projection device, for example, 300nit, which is not limited in this embodiment of the application.

In some embodiments, the screen display brightness of the default projection screen may be the maximum display brightness of the projection device.

Illustratively, the screen display brightness of the target projection screen satisfies the following formula (2):

B_n＝B_def _ault*G_nformula (2)

Wherein, B_nScreen display brightness for the target projection screen, B_{def ault}Is the default screen display brightness, G, of the projection screen_nThe brightness adjustment parameters obtained in step S102 are used.

It is understood that projection screens with different sizes may correspond to different screen display luminances, and assuming that the screen display luminance S _ def ault of the default projection screen is 300nit, the following table 1 provides a corresponding relationship between a target projection screen with different sizes and different screen display luminances according to an exemplary embodiment of the present application.

TABLE 1

Size of target projection screen	Screen display brightness of target projection screen
		S_def ault	300nit
S₁	300nit*G₁
		S₂	300nit*G₂
S₃	300nit*G₃
		S₄	300nit*G₄
……	……
		S_n	300nit*G_n

In some embodiments, the size of the projection screen is inversely related to the screen display brightness of the projection screen, i.e., the larger the size of the projection screen, the lower the screen display brightness of the projection screen. For example, the size of the default projection screen corresponding to the projection device is 100 inches, and the screen display brightness of the default projection screen is 300 nit. Assuming that the default projection screen corresponding to the projection device is replaced and the size of the target projection screen after replacement is 200 inches, the screen display brightness of the target projection screen can be obtained to be 75nit according to the above formula (1) and formula (2), that is, the larger the size of the projection screen is, the lower the screen display brightness of the projection screen is.

And S104, performing brightness mapping on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen, and then performing image display.

After the screen display brightness of the target projection screen is determined, the image display can be performed after the brightness mapping is performed on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen. Therefore, the brightness mapping is not performed on the high dynamic range image to be displayed according to the display brightness of the default projection screen, and then the image display is performed, so that the high dynamic range image subjected to the brightness mapping according to the screen display brightness of the target projection screen can be adapted to the current projection screen (namely the target projection screen) during the image display, and the brightness change trend subjected to the brightness mapping can be matched with the standard EOTF curve.

Based on the embodiment shown in fig. 11, in order to solve the problem that when a projection device is collocated with a non-default projection screen, a luminance change trend cannot be matched with a standard electro-optical transfer function curve, according to the projection device provided in the embodiment of the present application, first, a size of a target projection screen is obtained, which is easy to understand, if the size of the target projection screen is inconsistent with the size of the default screen, that is, the target projection screen is not the default screen, the display luminance of the target projection screen needs to be determined, and there is a correspondence between the size of the projection screen and the screen display luminance, a luminance adjustment parameter can be determined according to the size of the target projection screen and the size of the default projection screen, and then, the screen display luminance of the target projection screen is determined according to the luminance adjustment parameter and the screen display luminance of the default projection screen. And after the screen display brightness of the target projection screen is determined, the projection component is controlled to display the image after the brightness mapping is carried out on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen.

Therefore, the controller performs brightness mapping on the high dynamic range image to be displayed according to the determined screen display brightness of the target projection screen instead of performing brightness mapping on the high dynamic range image to be displayed according to the default display brightness of the projection screen, and the matching degree between the brightness change trend and the standard electro-optic transfer function curve is improved.

It can be seen that the foregoing describes the solution provided by the embodiments of the present application primarily from a methodological perspective. In order to implement the functions described above, the embodiments of the present application provide corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiment of the present application, the controller may be divided into the functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. Optionally, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and another division manner may be provided in actual implementation.

As shown in fig. 16, the controller 3000 includes a processor 3001, and optionally, a memory 3002 and a communication interface 3003, which are connected to the processor 3001. The processor 3001, the memory 3002, and the communication interface 3003 are connected by a bus 3004.

The processor 3001 may be a Central Processing Unit (CPU), a general purpose processor Network Processor (NP), a Digital Signal Processor (DSP), a microprocessor, a microcontroller, a Programmable Logic Device (PLD), or any combination thereof. The processor 3001 may also be any other means having a processing function, such as a circuit, a device, or a software module. The processor 3001 may also include multiple CPUs, and the processor 3001 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, or processing cores that process data (e.g., computer program instructions).

Memory 3002 may be a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, but is not limited to, electrically erasable programmable read-only memory (EEPROM), compact disk read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 3002 may be separate or integrated with the processor 3001. The memory 3002 may contain, among other things, computer program code. The processor 3001 is configured to execute the computer program code stored in the memory 3002, so as to implement the projection display method provided by the embodiment of the present application.

Communication interface 3003 may be used to communicate with other devices or communication networks (e.g., ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc.). Communication interface 3003 may be a module, circuitry, transceiver, or any device capable of enabling communication.

The bus 3004 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 3004 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 16, but this is not intended to represent only one bus or type of bus.

Embodiments of the present invention also provide a computer-readable storage medium, where the computer-readable storage medium includes computer-executable instructions, and when the computer-executable instructions are executed on a computer, the computer is caused to execute the method provided in the foregoing embodiments.

The embodiment of the present invention further provides a computer program product, which can be directly loaded into the memory and contains software codes, and the computer program product can implement the method provided by the above embodiment after being loaded and executed by the computer.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical function division, and there may be other division ways in actual implementation. For example, various elements or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A projection device, comprising:

the projection component is used for projecting an image to be projected onto a projection screen;

a controller coupled to the projection assembly and configured to:

acquiring the size of a target projection screen;

determining brightness adjusting parameters according to the size of the target projection screen and the size of a default projection screen;

and controlling the projection component to display the image after performing brightness mapping on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen.

2. The projection device of claim 1,

the controller is configured to acquire the size of a target projection screen, and specifically execute the following steps:

receiving a selection instruction of a user for the size of the target projection screen;

and determining the size of the target projection screen in response to the selection instruction.

3. The projection device of claim 1, further comprising:

the camera shooting assembly is used for acquiring an image of the environment where the projection equipment is located;

shooting the target projection screen through the camera shooting assembly to obtain an image of the target projection screen;

and determining the size of the target projection screen according to the image of the target projection screen.

4. The projection device of claim 1, wherein the brightness adjustment parameter satisfies the following formula:

wherein, G_nFor the brightness adjustment parameter, S _ default is the scale of the default projection screenCun, S_nThe size of the target projection screen;

the screen display brightness of the target projection screen satisfies the following formula:

B_n＝B_default*G_n

wherein, B_nDisplaying brightness for the screen of the target projection screen, B_defaultDisplay brightness of the default projection screen, G_nAnd adjusting the parameters for the brightness.

5. The projection device of any of claims 1 to 4, wherein the controller is configured to control the projection device to perform brightness mapping on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen, and specifically perform the following steps:

and performing brightness mapping on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen, so that the brightness change trend subjected to the brightness mapping is matched with a standard electro-optic transfer function curve.

6. A projection display method, comprising:

acquiring the size of a target projection screen;

and performing brightness mapping on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen, and then performing image display.

7. The method of claim 6, wherein obtaining the size of the target projection screen comprises:

8. The method of claim 6, wherein obtaining the size of the target projection screen comprises:

shooting the target projection screen to obtain an image of the target projection screen;

9. The method of claim 6, wherein the brightness adjustment parameter satisfies the following formula:

wherein, G_nFor the brightness adjustment parameter, S _ default is the default size of the projection screen, S_nThe size of the target projection screen;

B_n＝B_default*G_n

wherein, B_nDisplay brightness for the screen of the target projection screen, B_defaultIs the screen display brightness, G, of the default projection screen_nAnd adjusting the parameters for the brightness.

10. The method according to any one of claims 6 to 9, wherein the luminance mapping of the high dynamic range image to be displayed according to the screen display luminance of the target projection screen comprises:

and performing brightness mapping on the high dynamic range image to be displayed according to the screen display brightness of the target projection screen so as to enable the brightness change trend after the brightness mapping to be matched with a standard electro-optic transfer function curve.