CN117012155A

CN117012155A - Display apparatus and control method

Info

Publication number: CN117012155A
Application number: CN202210467583.3A
Authority: CN
Inventors: 张继兵; 孔孟菲; 王志平; 张宇; 姜旭东
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2023-11-07

Abstract

The application provides an embodiment, belongs to the technical field of display, and provides display equipment and a control method, wherein the display equipment comprises a backlight module and a processor connected with the backlight module, the backlight module comprises first light sources and second light sources which are staggered and independently driven, the color temperature of the first light sources is larger than that of the second light sources, and the processor is configured to: determining target brightness and target color temperature according to the picture signal to be displayed, and determining target current amplitude according to the target brightness; according to the target color temperature, determining a first current duty cycle corresponding to first driving of the first light source and a second current duty cycle corresponding to second driving of the second light source in a plurality of preset current duty cycles; and respectively controlling the first drive and the second drive to output target current amplitude according to the first current duty ratio and the second current duty ratio so as to adjust the current color temperature of the display device to the target color temperature. The application can better restore the true color of the display picture.

Description

Display apparatus and control method

Technical Field

The application relates to the technical field of display. And more particularly, to a display apparatus and a control method.

Background

The color temperature is a performance index of the display device, and when a light source of the display device emits light, a set of spectrums are generated, and when a pure black body is used for generating the same spectrums, the temperature required to be reached is the color temperature of the light source.

At present, the light source is usually driven by a single path, or multiple paths, but the color temperature of the output of the whole light source is fixed by using the light source with the same color block. If the color temperature of the picture displayed by the display device needs to be adjusted, the deflection degree of the liquid crystal molecules corresponding to the RGB pixels of the display panel is controlled to achieve the output of the corresponding brightness according to the target color temperature, that is, the color temperature is adjusted by controlling the brightness proportion of the RGB pixels of the display panel. However, the brightness ratio of the RGB pixels of the display panel is also required to control the color of the display screen displayed by the display device, so that the two requirements of color temperature adjustment and display screen color are easy to cause crosstalk, and the true color of the display screen cannot be restored.

Disclosure of Invention

The exemplary embodiment of the application provides a display device and a control method, which can effectively avoid crosstalk between two requirements, namely a color temperature adjustment requirement and a display picture color requirement, and better restore the true color of a display picture.

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

the backlight module comprises a first light source and a second light source, wherein the first light source and the second light source are arranged in a staggered mode and are driven independently, and the color temperature of the first light source is larger than that of the second light source;

and the processor is connected with the backlight module and is used for controlling driving signals of the first light source and the second light source so as to adjust the current color temperature of the display equipment to be a target color temperature, and the target color temperature is determined by the processor according to the picture signal to be displayed.

In some possible implementations, if the backlight module is a direct type backlight module, the color temperature difference between the first light source and the second light source is inversely proportional to the distance between the first light source and the second light source.

In some possible implementations, if the backlight module is a side-in backlight module, the color temperature difference between the first light source and the second light source is inversely proportional to the distance between the first light source and the second light source, and the color temperature difference is directly proportional to the width of the plastic frame of the side-in backlight module.

In a second aspect, an embodiment of the present application provides a control method, applied to a display device, including:

determining target brightness and target color temperature according to the picture signal to be displayed;

Determining a target current amplitude according to the target brightness;

according to the target color temperature, determining a first current duty cycle corresponding to first driving of the first light source and a second current duty cycle corresponding to second driving of the second light source in a plurality of preset current duty cycles;

the first driving output target current amplitude is controlled according to the first current duty ratio, and the second driving output target current amplitude is controlled according to the second current duty ratio, so that the current color temperature of the display device is adjusted to the target color temperature.

In some possible implementations, controlling the first drive output target current magnitude according to the first current duty cycle and controlling the second drive output target current magnitude according to the second current duty cycle includes: when the first current duty ratio and the second current duty ratio are both larger than the first threshold value and smaller than or equal to the second threshold value, the first driving output target current amplitude is controlled according to the first current duty ratio, and the second driving output target current amplitude is controlled according to the second current duty ratio.

In some possible implementations, controlling the first drive output target current magnitude according to the first current duty cycle and controlling the second drive output target current magnitude according to the second current duty cycle includes: when the first current duty ratio is a first threshold value and the second current duty ratio is a second threshold value, the target current amplitude is subjected to heightening treatment, and the target current amplitude after the heightening treatment is obtained; and controlling the first driving output to increase the processed target current amplitude according to the first current duty ratio, and controlling the second driving output to increase the processed target current amplitude according to the second current duty ratio.

In some possible implementations, controlling the first drive output target current magnitude according to the first current duty cycle and controlling the second drive output target current magnitude according to the second current duty cycle includes: when the first current duty ratio is a second threshold value and the second current duty ratio is the first threshold value, the target current amplitude is subjected to heightening treatment, and the target current amplitude after the heightening treatment is obtained; and controlling the first driving output to increase the processed target current amplitude according to the first current duty ratio, and controlling the second driving output to increase the processed target current amplitude according to the second current duty ratio.

In some possible implementations, the step of raising the target current amplitude to obtain the raised target current amplitude includes: and according to the target current amplitude and the target heightening proportion, carrying out heightening treatment on the target current amplitude to obtain the heightened target current amplitude, wherein the target heightening proportion is in a preset heightening proportion interval.

In some possible implementations, according to the target color temperature, determining, from a preset plurality of current duty ratios, a first current duty ratio corresponding to a first driving of the first light source and a second current duty ratio corresponding to a second driving of the second light source, includes: and inquiring the corresponding relation between the preset current duty ratio and the color temperature according to the target color temperature, and determining the first current duty ratio and the second current duty ratio.

In some possible implementations, after adjusting the current color temperature of the display device to the target color temperature, the control method further includes: and outputting a display picture corresponding to the picture signal to be displayed according to the target color temperature and the target color, wherein the target color is the target color of the picture to be displayed determined according to the picture signal to be displayed.

In a third aspect, an embodiment of the present application provides a control apparatus applied to a display device, including:

the first determining module is used for determining target brightness and target color temperature according to the picture signal to be displayed;

the second determining module is used for determining a target current amplitude according to the target brightness;

the third determining module is used for determining a first current duty cycle corresponding to first driving of the first light source and a second current duty cycle corresponding to second driving of the second light source in a plurality of preset current duty cycles according to the target color temperature;

and the control module is used for controlling the first driving output target current amplitude according to the first current duty ratio and controlling the second driving output target current amplitude according to the second current duty ratio so as to adjust the current color temperature of the display device to the target color temperature.

In some possible implementations, the control module is specifically configured to: when the first current duty ratio and the second current duty ratio are both larger than the first threshold value and smaller than or equal to the second threshold value, the first driving output target current amplitude is controlled according to the first current duty ratio, and the second driving output target current amplitude is controlled according to the second current duty ratio.

In some possible implementations, the control module is specifically configured to: when the first current duty ratio is a first threshold value and the second current duty ratio is a second threshold value, the target current amplitude is subjected to heightening treatment, and the target current amplitude after the heightening treatment is obtained; and controlling the first driving output to increase the processed target current amplitude according to the first current duty ratio, and controlling the second driving output to increase the processed target current amplitude according to the second current duty ratio.

In some possible implementations, the control module is specifically configured to: when the first current duty ratio is a second threshold value and the second current duty ratio is the first threshold value, the target current amplitude is subjected to heightening treatment, and the target current amplitude after the heightening treatment is obtained; and controlling the first driving output to increase the processed target current amplitude according to the first current duty ratio, and controlling the second driving output to increase the processed target current amplitude according to the second current duty ratio.

In some possible implementations, the control module is configured to, when configured to perform a step-up process on the target current amplitude to obtain the step-up processed target current amplitude, specifically: and according to the target current amplitude and the target heightening proportion, carrying out heightening treatment on the target current amplitude to obtain the heightened target current amplitude, wherein the target heightening proportion is in a preset heightening proportion interval.

In some possible implementations, the third determining module is specifically configured to: and inquiring the corresponding relation between the preset current duty ratio and the color temperature according to the target color temperature, and determining the first current duty ratio and the second current duty ratio.

In some possible implementations, the control module is further configured to: after the current color temperature of the display device is adjusted to the target color temperature, a display picture corresponding to the picture signal to be displayed is output according to the target color temperature and the target color, wherein the target color is the target color of the picture to be displayed determined according to the picture signal to be displayed.

In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, in which computer program instructions are stored, which when executed implement a control method according to the second aspect of the present application.

In a fifth aspect, embodiments of the present application provide a computer program product comprising a computer program which, when executed by a processor, implements a control method according to the second aspect of the present application.

The application provides display equipment and a control method, wherein the display equipment comprises a backlight module and a processor connected with the backlight module, the backlight module comprises a first light source and a second light source, the first light source and the second light source are arranged in a staggered mode and are driven independently, and the color temperature of the first light source is larger than that of the second light source; the processor is used for determining target brightness and target color temperature according to the picture signals to be displayed, and determining target current amplitude according to the target brightness; according to the target color temperature, determining a first current duty cycle corresponding to first driving of the first light source and a second current duty cycle corresponding to second driving of the second light source in a plurality of preset current duty cycles; the first driving output target current amplitude is controlled according to the first current duty ratio, and the second driving output target current amplitude is controlled according to the second current duty ratio, so that the current color temperature of the display device is adjusted to the target color temperature. The first light source and the second light source contained in the backlight module are arranged in a staggered mode and are driven independently, and the color temperature of the display device is adjusted by driving the first light source and the second light source, wherein the target current amplitude is output according to the current duty ratio corresponding to the first driving of the first light source and the second driving of the second light source respectively, so that the whole color temperature of the display device is flexible and changeable, the brightness proportion of the RGB pixels of the display panel is only used for controlling the color of a picture displayed by the display device, and therefore, the crosstalk of two requirements, namely the color temperature adjustment requirement and the display picture color requirement, can be effectively avoided, and the true color of the picture displayed by the display device is better restored.

These and other aspects of the application will be apparent from and elucidated with reference to the embodiment(s) described hereinafter.

Drawings

In order to more clearly illustrate the embodiments of the present application or the implementation of the related art, the drawings that are required for the embodiments or the related art description will be briefly described, and it is apparent that the drawings in the following description are some embodiments of the present application and that other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

Fig. 1 is a schematic diagram of an operation scenario between a display device and a user according to an embodiment of the present application;

fig. 2 is a block diagram of a hardware configuration of a display device according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a display device according to an embodiment of the present application;

fig. 4 is a schematic diagram of a first light source and a second light source in a direct type backlight module according to an embodiment of the application;

FIG. 5 is a schematic view showing a light beam diverging through a reflective lens according to an embodiment of the present application;

FIG. 6 is a schematic diagram of light spot superposition of a lamp bead according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a first light source and a second light source in a side-entry backlight module according to an embodiment of the application;

FIG. 8 is a flow chart of a control method according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a driving circuit according to an embodiment of the application;

FIG. 10 is a flow chart of a control method according to another embodiment of the present application;

FIG. 11 is a flowchart of a display device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a control device according to an embodiment of the present application.

Detailed Description

For the purposes of making the objects, embodiments and advantages of the present application more apparent, an exemplary embodiment of the present application will be described more fully hereinafter with reference to the accompanying drawings in which exemplary embodiments of the application are shown, it being understood that the exemplary embodiments described are merely some, but not all, of the examples of the application.

Based on the exemplary embodiments described herein, all other embodiments that may be obtained by one of ordinary skill in the art without making any inventive effort are within the scope of the appended claims. Furthermore, while the present disclosure has been described in terms of an exemplary embodiment or embodiments, it should be understood that each aspect of the disclosure can be practiced separately from the other aspects.

It should be noted that the brief description of the terminology in the present application is for the purpose of facilitating understanding of the embodiments described below only and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms "first," second, "" third and the like in the description and in the claims and in the above drawings are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated (Unless otherwise indicated). It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

The term "module" as used in this disclosure refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the function associated with that element.

The term "remote control" as used herein refers to a component of an electronic device (such as a display device as disclosed herein) that can be controlled wirelessly, typically over a relatively short distance. The electronic device is typically connected to the electronic device using infrared and/or Radio Frequency (RF) signals and/or bluetooth, and may also include functional modules such as WIFI, wireless USB, bluetooth, motion sensors, etc. For example: the hand-held touch remote controller replaces most of the physical built-in hard keys in a general remote control device with a touch screen user interface.

The term "gesture" as used herein refers to a user action by a change in hand shape or hand movement, etc., used to express an intended idea, action, purpose, or result.

Fig. 1 is a schematic diagram of an operation scenario between a display device and a user according to an embodiment of the present application. As shown in fig. 1, the user turns on the display device 200 to watch the video, and the display device 200 displays a screen corresponding to the video.

As also shown in fig. 1, the display device 200 is also in data communication with the server 400 via a variety of communication means. The display device 200 may be permitted to make communication connections via a Local Area Network (LAN), a Wireless Local Area Network (WLAN), and other networks. The server 400 may provide various contents and interactions to the display device 200. The server 400 may be a cluster, or may be multiple clusters, and may include one or more types of servers. Other web service content such as video on demand and advertising services are provided through the server 400.

The display device 200 is, for example, a liquid crystal display. The particular display device type, size, resolution, etc. are not limited, and those skilled in the art will appreciate that the display device 200 may be modified in performance and configuration as desired. The display device 200 may additionally provide an intelligent network television function of a computer support function in addition to the broadcast receiving television function.

Fig. 2 is a block diagram of a hardware configuration of a display device according to an embodiment of the present application. As shown in fig. 2, in some embodiments, at least one of the controller 250, the communicator 220, the detector 230, the input/output interface 255, the display 275, the memory 260, the power supply 290, the user interface 265 are included in the display device 200.

In some embodiments, the display 275 is configured to receive image signals derived from the processor output, and to display video content and images and components of the menu manipulation interface.

In some embodiments, display 275 includes a display screen assembly for presenting pictures, and a drive assembly for driving the display of images.

In some embodiments, the display 275 is used to present a user-manipulated UI interface generated in the display device 200 and used to control the display device 200.

In some embodiments, depending on the type of display 275, a drive assembly for driving the display is also included, such as a drive assembly for a backlight.

In some embodiments, communicator 220 is a component for communicating with external devices or external servers according to various communication protocol types. For example: the communicator 220 may include at least one of a WIFI chip, a bluetooth communication protocol chip, a wired ethernet communication protocol chip, and other network communication protocol chips or a near field communication protocol chip, and an infrared receiver. The WIFI chip corresponds to the WIFI module 221, and may also be referred to as a wireless module; the bluetooth communication protocol chip corresponds to the bluetooth module 222; the wired ethernet communication protocol chip corresponds to the wired ethernet module 223.

In some embodiments, the display device 200 may establish control signal and data signal transmission and reception between the communicator 220 and an external control device or a content providing device.

In some embodiments, the user interface 265 may be used to receive infrared control signals from a control device (e.g., an infrared remote control, etc.).

In some embodiments, the detector 230 is a signal that the display device 200 uses to capture or interact with the external environment.

In some embodiments, the detector 230 includes an optical receiver, a sensor for capturing the intensity of ambient light, a parameter change may be adaptively displayed by capturing ambient light, etc.

In some embodiments, the detector 230 may further include an image collector 232, such as a camera, a video camera, etc., which may be used to collect external environmental scenes, collect attributes of a user or interact with a user, adaptively change display parameters, and recognize a user gesture to implement a function of interaction with the user.

In some embodiments, the detector 230 may also include a sound collector 231 or the like, such as a microphone, that may be used to receive the user's sound.

In some embodiments, as shown in fig. 2, the input/output interface 255 is configured to enable data transfer between the controller 250 and an external other device or other controller.

In some embodiments, the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored on the memory. The controller 250 may control the overall operation of the display apparatus 200. For example: in response to receiving a User command to select a User Interface (UI) object to be displayed on the display 275, the controller 250 may perform an operation related to the object selected by the User command.

As shown in fig. 2, the controller 250 includes at least one of a random access Memory 251 (Random Access Memory, RAM), a Read-Only Memory 252 (ROM), a video processor 270, an audio processor 280, a graphics processor 253 (Graphics Processing Unit, GPU), a processor 254 (Central Processing Unit, CPU), a communication interface (Communication Interface), and a communication Bus 256 (Bus). Wherein the communication bus connects the various components.

In some embodiments, RAM 251 is used to store temporary data for the operating system or other on-the-fly programs.

In some embodiments, ROM252 is used to store instructions for various system boots.

In some embodiments, ROM252 is used to store a basic input output system, referred to as a basic input output system (Basic lnput Output System, BIOS). The system comprises a drive program and a boot operating system, wherein the drive program is used for completing power-on self-checking of the system, initialization of each functional module in the system and basic input/output of the system.

In some embodiments, upon receipt of the power-on signal, the display device 200 power starts up, the CPU runs system boot instructions in the ROM252, copies temporary data of the operating system stored in memory into the RAM 251, in order to start up or run the operating system. When the operating system is started, the CPU copies temporary data of various applications in the memory to the RAM 251, and then, facilitates starting or running of the various applications.

In some embodiments, CPU processor 254 is used to execute operating system and application program instructions stored in memory. And executing various application programs, data and contents according to various interactive instructions received from the outside, so as to finally display and play various audio and video contents.

In some exemplary embodiments, the CPU processor 254 may comprise a plurality of processors. The plurality of processors may include one main processor and one or more sub-processors. A main processor for performing some operations of the display apparatus 200 in the pre-power-up mode and/or displaying a picture in the normal mode. One or more sub-processors for one operation in a standby mode or the like.

In some embodiments, the graphics processor 253 is configured to generate various graphic objects, including an operator, and display the various objects according to display attributes by receiving user input of various interactive instructions to perform the operation. And a renderer for rendering the various objects obtained by the arithmetic unit, wherein the rendered objects are used for being displayed on a display.

In some embodiments, video processor 270 is configured to receive external video signals, perform video processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, image composition, etc., according to standard codec protocols for input signals, and may result in signals that are displayed or played on directly displayable device 200.

In some embodiments, the graphics processor 253 may be integrated with the video processor, or may be separately provided, where the integrated configuration may perform processing of graphics signals output to the display, and the separate configuration may perform different functions.

In some embodiments, the audio processor 280 is configured to receive an external audio signal, decompress and decode the audio signal according to a standard codec protocol of an input signal, and perform noise reduction, digital-to-analog conversion, and amplification processing, so as to obtain a sound signal that can be played in a speaker.

In some embodiments, video processor 270 may include one or more chips. The audio processor may also comprise one or more chips.

In some embodiments, video processor 270 and audio processor 280 may be separate chips or may be integrated together with the controller in one or more chips.

In some embodiments, the audio output, under the control of the controller 250, receives the sound signal output by the audio processor 280, and may output to an external sound output terminal of the generating device of the external device, in addition to a speaker carried by the display device 200 itself, and may further include a close range communication module in the communication interface.

The power supply 290 supplies power input from an external power source to the display device 200 under the control of the controller 250. The power supply 290 may include a built-in power circuit installed inside the display device 200, or may be an external power source installed in the display device 200, and a power interface for providing an external power source in the display device 200.

The user interface 265 is used to receive an input signal from a user and then transmit the received user input signal to the controller 250. The user input signal may be a remote control signal received through an infrared receiver, and various user control signals may be received through a network communication module.

The memory 260 includes memory storing various software modules for driving the display device 200.

Currently, the color temperature of a picture displayed by a display device is generally adjusted by the brightness ratio of Red Green Blue (RGB) pixels of the display panel, and meanwhile, the color of the picture displayed by the display device needs to be controlled by the brightness ratio of RGB pixels of the display panel, so that crosstalk is easily caused by two requirements, namely, the color temperature adjustment requirement and the display picture color requirement. For example, when the blue color is displayed in a warm background, the RGB pixels of the display panel need to control the picture to be warm, reduce the proportion of positive blue, and display the positive blue, the displayed blue color is warm, and the true color cannot be restored.

Based on the above problems, the present application provides a display device and a control method, in which the color temperature of the display device is adjusted by the backlight source, so that the overall color temperature of the display device is flexible and changeable, and the brightness ratio of the RGB pixels of the display panel is only used for controlling the color of the picture displayed by the display device, so that the crosstalk between the two requirements of the color temperature adjustment requirement and the display picture color requirement can be effectively avoided, and the true color of the picture displayed by the display device can be better restored.

Fig. 3 is a schematic structural diagram of a display device according to an embodiment of the application, as shown in fig. 3, the display device 200 includes a backlight module 201, the backlight module 201 includes a first light source 2011 and a second light source 2012, the first light source 2011 and the second light source 2012 are staggered and independently driven, and a color temperature of the first light source 2011 is greater than a color temperature of the second light source 2012; the processor 202 is connected to the backlight module 201, and is configured to control driving signals of the first light source 2011 and the second light source 2012 to adjust a current color temperature of the display device 200 to a target color temperature, where the target color temperature is determined by the processor 202 according to a picture signal to be displayed. For how the processor 202 specifically controls the driving signals of the first light source 2011 and the second light source 2012 to adjust the current color temperature of the display device 200 to the target color temperature, reference may be made to the following embodiments of the control method, which are not described herein.

Alternatively, if the backlight module 201 is a direct type backlight module, the color temperature difference between the first light source 2011 and the second light source 2012 is inversely proportional to the distance between the first light source 2011 and the second light source 2012.

Alternatively, if the backlight module 201 is a side-in backlight module, the color temperature difference between the first light source 2011 and the second light source 2012 is inversely proportional to the distance between the first light source 2011 and the second light source 2012, and the color temperature difference is directly proportional to the width of the frame of the side-in backlight module.

Fig. 4 is a schematic diagram illustrating a first light source and a second light source in a direct type backlight module according to an embodiment of the application. As shown in fig. 4, assuming that the lamp bead a is a first light source, the lamp bead B is a second light source, the lamp beads a and B are staggered, and the color temperature difference between the lamp bead a and the lamp bead B is more than 5000K, for example, the lamp beads with the same color temperature are connected in series and driven separately. Through adopting lamp pearl A and lamp pearl B staggered arrangement's mode, different colour temperature lamp pearl intervals are less relatively, and the light mixing is even relatively, therefore, the inhomogeneous condition of subjective colour can not appear. If the mode of setting the lamp beads with the same color temperature in a single row is adopted, obvious color difference between the current and the row is easy to appear because the light rays with the same color temperature are mutually overlapped, and the whole display effect is influenced. In order to avoid the color temperature difference between the visible lamp beads A and B of the display picture, the distance between the lamp beads A and B is required to be inversely proportional to the color temperature difference between the lamp beads A and B, namely, the larger the color temperature difference between the adjacent lamp beads is, the smaller the distance is required, otherwise, the picture has the visible color temperature difference; the smaller the color temperature difference of the adjacent lamp beads is, the proper interval can be increased, but the whole color temperature adjustable range is weaker. Specifically, the following two embodiments may be adopted:

(1) When the positions of the lamp beads are fixed, namely, the distances between the lamp beads A and B adjacent to each other with different color temperatures are fixed, a reflective lens with a divergence angle of about 170 degrees is selected for use, and the lamp beads with proper color temperature differences are selected for use according to the distances of the lamp beads. The bulb selecting principle is as follows: subjective confirmation is carried out by setting up lamp beads with different color temperatures, and the color temperature difference is not easy to be checked when the local color temperature difference of the display picture is smaller than or equal to 1000K based on the invisible color temperature difference. Fig. 5 is a schematic view of light rays diverging through a reflective lens according to an embodiment of the present application, as shown in fig. 5, by using the principle of divergence of the reflective lens, light rays emitted from light beads disposed on a printed circuit board (Printed Circuit Board, PCB) can be fully mixed after passing through the reflective lens. Based on fig. 5, fig. 6 is a schematic diagram of light spot superposition of the lamp beads according to an embodiment of the present application, and as shown in fig. 6, light spots between adjacent lamp beads are superimposed and light is uniform. Taking a typical reflective lens as an example, the basic relationship between the color temperature difference (i.e. the color temperature difference) and the bead spacing of the divergent angle is shown in table 1:

TABLE 1

(2) When the positions of the lamp beads are not fixed, but the color temperature difference requirement is relatively large, firstly, the lamp beads A and B corresponding to the large-color temperature difference are selected, and then the distance between the lamp beads is determined. The principle of determining the distance between the lamp beads is as follows: through setting up lamp pearl A and lamp pearl B of different interval arrangements, subjective confirmation is based on the unseen colour temperature difference, is difficult for looking up the colour temperature difference when the local colour temperature difference of display screen is less than or equal to 1000K generally.

Optionally, in order to avoid the phenomenon of light shadow occurring on the picture when the single-channel color temperature light beads are completely turned off, the number of the high-low color temperature light beads can be approximately 2 times that of the common arrangement.

Fig. 7 is a schematic diagram of a first light source and a second light source in a side-entry backlight module according to an embodiment of the present application, as shown in fig. 7, the side-entry backlight module includes side-entry light beads, a light guide plate and a glue frame, and it is assumed that the side-entry light beads C are the first light source, the side-entry light beads D are the second light source, the side-entry light beads C and the side-entry light beads D are staggered and independently driven, a color temperature difference value of the side-entry light beads C and the side-entry light beads D is inversely proportional to a distance P between the side-entry light beads C and the side-entry light beads D, and a color temperature difference value of the side-entry light beads C and the side-entry light beads D is directly proportional to a glue frame width H of the side-entry backlight module.

The display device provided by the embodiment of the application comprises the backlight module and the processor connected with the backlight module, wherein the backlight module comprises the first light source and the second light source which are arranged in a staggered mode and are driven independently, and the relation between the color temperature difference value of the first light source and the second light source and the distance between the first light source and the second light source is considered, so that uniform light mixing can be obtained, and the situation of uneven subjective color does not occur.

The following describes how the processor in the display device provided by the embodiment of the present application executes the control method.

Fig. 8 is a flowchart of a control method according to an embodiment of the present application, which is applied to a display device. As shown in fig. 8, the processor in the display device is configured to perform the steps of:

in S801, a target luminance and a target color temperature are determined according to a picture signal to be displayed.

In the embodiment of the application, the image signal to be displayed is an input signal obtained by converting information corresponding to the image to be displayed by a main board of the display device through a display panel time sequence controller (Timing Controller, TCON). The current correlation technique can be adopted to analyze the picture signal to be displayed and determine the target brightness and the target color temperature corresponding to the picture to be displayed. For example, the display device is a lcd tv, and it is assumed that a user watches a tv program through the lcd tv in daytime, and the dominant hue of the watched tv program is a nostalgic atmosphere, at this time, since external light is strong, in order to ensure a clear picture, a display picture needs to be lightened (the existing lcd tv generally has a light sensing system and can automatically capture the external bright and dark condition), and the dominant hue corresponding to the nostalgic atmosphere is warmer, so that the target brightness and the target color temperature can be determined.

In S802, a target current amplitude is determined based on the target brightness.

In this step, after the target luminance is determined, the target current amplitude may be determined according to the target luminance. If, for example, a screen displayed by the display device needs to be lightened, it can be determined that the target current amplitude is a higher current. For how to determine the target current amplitude according to the target brightness, reference may be made to the related art, and details are not repeated here.

In S803, according to the target color temperature, a first current duty ratio corresponding to a first driving of the first light source and a second current duty ratio corresponding to a second driving of the second light source are determined among a plurality of preset current duty ratios.

For example, the preset plurality of current duty ratios may be obtained by a developer through a test for a model of each display device. The first drive of the first light source and the second drive of the second light source are for example both pulse width modulated (Pulse Width Modulation, PWM) drives. The basic working principle of pulse width modulation is as follows: the digital output of the microprocessor is utilized to control the analog circuit, the control mode is to control the on-off of the switching device of the inverter circuit, so that a series of pulses with equal amplitude are obtained at the output end, and the pulses are used for replacing sine waves or needed waveforms; generating a plurality of pulses in a half period of an output waveform, so that the equivalent voltage of each pulse is a sine waveform, and the obtained output is smooth and has less low-order harmonic waves; the width of each pulse is modulated according to a certain rule, so that the output voltage of the inverter circuit can be changed, and the output frequency can be changed.

Fig. 9 is a schematic diagram of a driving circuit according to an embodiment of the present application, and as shown in fig. 9, the driving circuit includes a PWM1 driving circuit, a PWM2 driving circuit, and an analog current adjusting circuit, where the PWM1 driving circuit and the PWM2 driving circuit are connected in parallel, and the PWM1 driving circuit and the PWM2 driving circuit are connected in series with the analog current adjusting circuit, respectively. Specifically, the analog current adjusting circuit includes elements such as a power transformer, a full-wave bridge rectifier, a filter, a voltage regulator, a capacitor, a resistor, a heat sink, and a plug, which are not shown in fig. 9, to which reference is made to the related art. The working principle of the analog current regulating circuit is as follows: the alternating current is rectified and filtered by a diode, then sequentially passes through a high-power triode and a medium-power triode, the high-power triode and the medium-power triode are conducted through a resistor to be output for power supply, then one triode or an integrated block is used as a comparator, one end of the comparator is connected with a reference voltage, and the other end of the comparator is connected with a current-limiting resistor in series. The alternating current provided by the power grid is 220V or 380V generally, and the magnitudes of the direct current voltages required by various electronic devices are different, so that the near-grid voltage is often required to be processed through a power transformer to obtain a transformed secondary voltage, and then the transformed secondary voltage is subjected to rectification, filtering and voltage stabilizing treatment to obtain the required direct current voltage magnitudes. The rectifying circuit corresponding to the full-wave bridge rectifier rectifies the sine alternating voltage with positive and negative alternation into unidirectional pulsating voltage by utilizing a rectifying element with unidirectional conductive performance. The filter is composed of energy storage elements such as a capacitor, an inductor and the like, and the filter has the function of filtering out pulsation components in unidirectional pulsation voltage as much as possible, so that the output voltage becomes smoother direct current voltage. The voltage stabilizing circuit corresponding to the voltage stabilizer has the function of taking certain measures to ensure that the output direct-current voltage is kept stable when the power grid voltage or the load current changes. The PWM1 driving circuit and the PWM1 driving circuit include elements such as chip resistors, chip porcelain, diodes, triodes, and driving chips, which are not shown in fig. 9, and reference is made to the related art. The brightness information required by the backlight is controlled by a driving chip to bias the base electrode of a transistor or the grid electrode of a metal oxide semiconductor field effect transistor (Metal Oxide Semiconductor Field Effect Transistor, MOSFET), so that the on time of the transistor or the MOSFET is realized, and a series of pulses with equal amplitude are obtained at the output end. Referring to fig. 9, assuming that the first driving of the first light source (lamp bead a) corresponds to the PWM1 driving circuit, assuming that the second driving of the second light source (lamp bead B) corresponds to the PWM2 driving circuit, taking the PWM1 driving circuit as an example, an input signal to a driving chip of the PWM1 driving circuit is a digital signal corresponding to a first current duty ratio and a target current amplitude, and a clock signal is used to control a ratio of the switching time according to the first current duty ratio.

In this step, after the target color temperature is determined, a first current duty ratio corresponding to a first driving of the first light source and a second current duty ratio corresponding to a second driving of the second light source may be determined among a plurality of preset current duty ratios. For how to determine the first current duty ratio corresponding to the first driving of the first light source and the second current duty ratio corresponding to the second driving of the second light source in the preset multiple current duty ratios according to the target color temperature, reference may be made to the subsequent embodiments, which are not described herein.

In S804, the first driving output target current amplitude is controlled according to the first current duty ratio, and the second driving output target current amplitude is controlled according to the second current duty ratio to adjust the present color temperature of the display device to the target color temperature.

In this step, after determining a first current duty ratio corresponding to a first driving of the first light source and a second current duty ratio corresponding to a second driving of the second light source, the first driving output target current amplitude may be controlled according to the first current duty ratio, and the second driving output target current amplitude may be controlled according to the second current duty ratio, so as to adjust the current color temperature of the display device to a target color temperature. For example, to ensure the uniformity of the brightness of the pictures displayed by the display device under different target color temperatures, the power supply may be designed as a step power supply, for example, when the target color temperature is the extreme cold color temperature or the extreme warm color temperature, the target current amplitude may be output after being subjected to the process of increasing the target current amplitude. For how to control the first driving output target current amplitude according to the first current duty ratio and control the second driving output target current amplitude according to the second current duty ratio, reference may be made to the following embodiments, and details thereof will not be repeated here. It is understood that, after the display device is adjusted to the target color temperature, the target color temperature may be used to output a display screen corresponding to the to-be-displayed screen signal.

According to the control method provided by the embodiment of the application, the target brightness and the target color temperature are determined according to the picture signal to be displayed, and the target current amplitude is determined according to the target brightness; according to the target color temperature, determining a first current duty cycle corresponding to first driving of the first light source and a second current duty cycle corresponding to second driving of the second light source in a plurality of preset current duty cycles; the first driving output target current amplitude is controlled according to the first current duty ratio, and the second driving output target current amplitude is controlled according to the second current duty ratio, so that the current color temperature of the display device is adjusted to the target color temperature. According to the embodiment of the application, the color temperature of the display device is adjusted by controlling the first light source and the second light source contained in the backlight module, wherein the target current amplitude is output according to the current duty ratio corresponding to the first drive of the first light source and the second drive of the second light source respectively, so that the whole color temperature of the display device is flexible and changeable, and the brightness proportion of the RGB pixels of the display panel is only used for controlling the color of the picture displayed by the display device, therefore, the crosstalk of two requirements of the color temperature adjustment requirement and the display picture color requirement can be effectively avoided, and the true color of the picture displayed by the display device is better restored.

Fig. 10 is a flowchart of a control method according to another embodiment of the present application. On the basis of the above embodiments, the control method is further described in the embodiments of the present application. As shown in fig. 10, the processor in the display device is configured to perform the steps of:

in S1001, a target luminance and a target color temperature are determined according to a picture signal to be displayed.

The specific implementation process of this step may be referred to as related description of S801 in the embodiment shown in fig. 8, which is not described herein.

In S1002, a target current amplitude is determined according to a target luminance.

The specific implementation process of this step may be referred to as S802 in the embodiment shown in fig. 8, which is not described herein.

In the embodiment of the present application, step S803 in fig. 8 may further include the following step S1003:

in S1003, according to the target color temperature, a correspondence between a preset current duty ratio and the color temperature is queried, and a first current duty ratio corresponding to a first driving of the first light source and a second current duty ratio corresponding to a second driving of the second light source are determined.

For example, the correspondence between the preset current duty cycle and the color temperature may be obtained by testing a developer for each model of the display device, and may be stored in a movement of a main board of the display device in advance. In the step, after the target color temperature is obtained, the corresponding relation between the preset current duty ratio and the color temperature stored in the movement of the main board of the display device can be queried according to the target color temperature, and the first current duty ratio corresponding to the first driving of the first light source and the second current duty ratio corresponding to the second driving of the second light source are determined. For example, the target color temperature is 6500K, and the corresponding relationship between the preset current duty cycle and the color temperature is queried, so that the first current duty cycle corresponding to the first driving is determined to be 50%, and the second current duty cycle corresponding to the second driving is determined to be 50%.

In the embodiment of the present application, step S804 in fig. 8 may further include three steps S1004 to 1006 as follows:

in S1004, when both the first current duty ratio and the second current duty ratio are greater than the first threshold value and less than or equal to the second threshold value, the first driving output target current amplitude is controlled according to the first current duty ratio, and the second driving output target current amplitude is controlled according to the second current duty ratio, so as to adjust the current color temperature of the display device to the target color temperature.

Illustratively, the first threshold is, for example, 0% and the second threshold is, for example, 100%. Assuming that the first current duty ratio corresponding to the first driving is 50% and the second current duty ratio corresponding to the second driving is 50%, controlling the first driving to output the target current amplitude, and controlling the second driving to output the target current amplitude, that is, driving the current amplitude to adopt 100% output, so as to adjust the current color temperature of the display device to the target color temperature.

In S1005, when the first current duty ratio is a first threshold value and the second current duty ratio is a second threshold value, performing a step of raising the target current amplitude to obtain a raised target current amplitude; and controlling the target current amplitude after the first driving output is subjected to the heightening treatment according to the first current duty ratio, and controlling the target current amplitude after the second driving output is subjected to the heightening treatment according to the second current duty ratio so as to adjust the current color temperature of the display device to be the target color temperature.

In S1006, when the first current duty ratio is the second threshold value and the second current duty ratio is the first threshold value, the target current amplitude is subjected to a step-up process, so as to obtain a step-up processed target current amplitude; and controlling the target current amplitude after the first driving output is subjected to the heightening treatment according to the first current duty ratio, and controlling the target current amplitude after the second driving output is subjected to the heightening treatment according to the second current duty ratio so as to adjust the current color temperature of the display device to be the target color temperature.

Illustratively, the first threshold is, for example, 0% and the second threshold is, for example, 100%. And when the first current duty ratio is 0% and the second current duty ratio is 100%, carrying out the heightening treatment on the target current amplitude to obtain the target current amplitude after the heightening treatment. Or when the first current duty ratio is 100% and the second current duty ratio is 0%, the target current amplitude is subjected to the heightening treatment, and the target current amplitude after the heightening treatment is obtained. It can be understood that, because each bead contributes differently to the brightness of each region, when the high color temperature bead and the low color temperature bead are fully opened, the brightness of the whole picture can be ensured to be uniformly distributed; when one of the color temperature lamps is on and the other color temperature lamp is off, the area with large contribution degree of the original off color temperature can be darkened, and the luminous brightness of the on color temperature lamp bead is required to be improved to supplement the influence caused by the off lamp. The specific current rise magnitude may be determined according to a specific bead arrangement scheme. In order to ensure the consistency of the brightness of the pictures at different color temperatures, a step power supply design can be adopted for the power supply. Referring to fig. 9, if it is determined that the user needs an eye-protection mode in the case of turning off the light at night, the picture to be displayed of the display device needs to be adjusted to a low-brightness and yellowish picture, i.e., an overall low-brightness warm-color temperature state. At this time, in order to ensure warm color temperature, the first current duty ratio limit corresponding to the PWM1 driving circuit needs to be adjusted to 0%, and correspondingly, the second current duty ratio corresponding to the PWM2 driving circuit needs to be adjusted to 100%; the user needs to be low in brightness, the analog current adjusting circuit can adjust the output current down, and specific brightness can be controlled through the gear of the analog current adjusting circuit.

Optionally, the step of performing a step-up process on the target current amplitude to obtain a step-up processed target current amplitude may include: and according to the target current amplitude and the target heightening proportion, carrying out heightening treatment on the target current amplitude to obtain the heightened target current amplitude, wherein the target heightening proportion is in a preset heightening proportion interval.

Illustratively, the preset upscaled interval is, for example, [110%,120% ]. Assuming that the target current amplitude is 10V and the target current amplitude is 115%, it is possible to determine that the target current amplitude after the step-up processing is the product of the target current amplitude and the target step-up ratio, that is, 10×115% =11.5v.

It should be noted that, the embodiment of the present application does not limit the execution sequence of the step S1004, the step S1005, and the step S1006.

In S1007, after the current color temperature of the display apparatus is adjusted to the target color temperature, a display screen corresponding to the screen signal to be displayed is output according to the target color temperature and the target color, the target color being a target color of the screen to be displayed determined according to the screen signal to be displayed.

Based on the driving circuit shown in fig. 9, fig. 11 is a schematic flow chart of outputting a display screen by the display device according to an embodiment of the present application, and as shown in fig. 11, the display device is, for example, a liquid crystal television, and it is assumed that a user watches a television program through the liquid crystal television in daytime, external light is stronger, and the dominant tone of the watched television program is a nostalgic atmosphere, and the main board of the display device is an input signal obtained after converting information corresponding to the display screen through the display panel TCON. And determining target brightness and target color temperature corresponding to the picture to be displayed according to the input signal. Because the external light is stronger, the display picture needs to be lightened to ensure the picture to be clear, the analog current can be regulated by the analog current regulating circuit according to the determined target brightness, and the target current amplitude is output; the main tone corresponding to the nostalgic atmosphere is warm, so that the first current duty ratio corresponding to the PWM1 driving circuit can be reduced or adjusted to 0% according to the determined target color temperature, the first driving output target current amplitude is controlled, and correspondingly, the second current duty ratio corresponding to the PWM2 driving circuit is increased or adjusted to 100%, and the second driving output target current amplitude is controlled, so as to adjust the backlight color temperature. The display surface book of the display device determines the target color of the picture to be displayed according to the target display content corresponding to the picture to be displayed, and further controls the brightness of the RGB pixels of the display panel to synthesize animation information to be displayed. At this time, the display device outputs a primary color moving picture, i.e., a real picture, having high luminance and a warm overall tone.

According to the control method provided by the embodiment of the application, the target brightness and the target color temperature are determined according to the picture signal to be displayed; determining a target current amplitude according to the target brightness; inquiring the corresponding relation between the preset current duty ratio and the color temperature according to the target color temperature, and determining a first current duty ratio corresponding to the first driving of the first light source and a second current duty ratio corresponding to the second driving of the second light source; when the first current duty ratio and the second current duty ratio are both larger than a first threshold value and smaller than or equal to a second threshold value, controlling a first driving output target current amplitude according to the first current duty ratio, and controlling a second driving output target current amplitude according to the second current duty ratio so as to adjust the current color temperature of the display device to a target color temperature; or when the first current duty ratio is the first threshold value and the second current duty ratio is the second threshold value or when the first current duty ratio is the second threshold value and the second current duty ratio is the first threshold value, carrying out heightening treatment on the target current amplitude to obtain the target current amplitude after the heightening treatment; controlling the target current amplitude after the first driving output is subjected to the heightening treatment according to the first current duty ratio, and controlling the target current amplitude after the second driving output is subjected to the heightening treatment according to the second current duty ratio so as to adjust the current color temperature of the display device to be a target color temperature; after the display device is adjusted to the target color temperature, a display picture corresponding to the picture signal to be displayed is output according to the target color temperature and the target color, wherein the target color is determined according to the picture signal to be displayed. According to the embodiment of the application, the color temperature of the display device is adjusted by controlling the first light source and the second light source contained in the backlight module, wherein the target current amplitude is output according to the current duty ratio respectively corresponding to the first drive of the first light source and the second drive of the second light source, and the target current amplitude can be adjusted to be higher in order to ensure the uniform distribution of the brightness of the whole picture; the brightness ratio of the RGB pixels of the display panel is only used for controlling the colors of the pictures displayed by the display device, so that crosstalk between two requirements, namely a color temperature adjustment requirement and a display picture color requirement, can be effectively avoided, and the true colors of the pictures displayed by the display device can be better restored.

The following are examples of the apparatus of the present application that may be used to perform the method embodiments of the present application. For details not disclosed in the embodiments of the apparatus of the present application, please refer to the embodiments of the method of the present application.

Fig. 12 is a schematic structural diagram of a control device according to an embodiment of the present application, where the control device is applied to a display apparatus. As shown in fig. 12, a control device 1200 provided in an embodiment of the present application includes: a first determination module 1201, a second determination module 1202, a third determination module 1203, and a control module 1204. Wherein:

a first determining module 1201 is configured to determine a target brightness and a target color temperature according to a picture signal to be displayed.

A second determining module 1202 is configured to determine a target current amplitude according to the target brightness.

The third determining module 1203 is configured to determine, according to the target color temperature, a first current duty cycle corresponding to a first driving of the first light source and a second current duty cycle corresponding to a second driving of the second light source from a plurality of preset current duty cycles.

The control module 1204 is configured to control the first driving output target current amplitude according to the first current duty ratio, and control the second driving output target current amplitude according to the second current duty ratio, so as to adjust the current color temperature of the display device to the target color temperature.

In some embodiments, the control module 1204 may be specifically configured to: when the first current duty ratio and the second current duty ratio are both larger than the first threshold value and smaller than or equal to the second threshold value, the first driving output target current amplitude is controlled according to the first current duty ratio, and the second driving output target current amplitude is controlled according to the second current duty ratio.

In some embodiments, the control module 1204 may be specifically configured to: when the first current duty ratio is a first threshold value and the second current duty ratio is a second threshold value, the target current amplitude is subjected to heightening treatment, and the target current amplitude after the heightening treatment is obtained; and controlling the first driving output to increase the processed target current amplitude according to the first current duty ratio, and controlling the second driving output to increase the processed target current amplitude according to the second current duty ratio.

In some embodiments, the control module 1204 may be specifically configured to: when the first current duty ratio is a second threshold value and the second current duty ratio is the first threshold value, the target current amplitude is subjected to heightening treatment, and the target current amplitude after the heightening treatment is obtained; and controlling the first driving output to increase the processed target current amplitude according to the first current duty ratio, and controlling the second driving output to increase the processed target current amplitude according to the second current duty ratio.

In some embodiments, when the control module 1204 is configured to perform a step-up process on the target current amplitude to obtain the step-up processed target current amplitude, the control module may be specifically configured to: and according to the target current amplitude and the target heightening proportion, carrying out heightening treatment on the target current amplitude to obtain the heightened target current amplitude, wherein the target heightening proportion is in a preset heightening proportion interval.

In some embodiments, the third determination module 1203 may be specifically configured to: and inquiring the corresponding relation between the preset current duty ratio and the color temperature according to the target color temperature, and determining the first current duty ratio and the second current duty ratio.

In some embodiments, the control module 1204 may also be configured to: after the current color temperature of the display device is adjusted to the target color temperature, a display picture corresponding to the picture signal to be displayed is output according to the target color temperature and the target color, wherein the target color is the target color of the picture to be displayed determined according to the picture signal to be displayed.

It should be noted that, the device provided in this embodiment may be used to execute the above-mentioned control method, and its implementation manner and technical effects are similar, and this embodiment is not repeated here.

It should be noted that, it should be understood that the division of the modules of the above apparatus is merely a division of a logic function, and may be fully or partially integrated into a physical entity or may be physically separated. And these modules may all be implemented in software in the form of calls by the processing element; or can be realized in hardware; the method can also be realized in a form of calling software by a processing element, and the method can be realized in a form of hardware by a part of modules. For example, the processing module may be a processing element that is set up separately, may be implemented in a chip of the above-mentioned apparatus, or may be stored in a memory of the above-mentioned apparatus in the form of program codes, and the functions of the above-mentioned processing module may be called and executed by a processing element of the above-mentioned apparatus. The implementation of the other modules is similar. In addition, all or part of the modules can be integrated together or can be independently implemented. The processing element here may be an integrated circuit with signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in a software form.

For example, the modules above may be one or more integrated circuits configured to implement the methods above, such as: one or more ASICs (Application Specific Integrated Circuit, specific integrated circuits), or one or more DSPs (Digital Signal Processor, digital signal processors), or one or more FPGAs (Field Programmable Gate Array, field programmable gate arrays), etc. For another example, when a module above is implemented in the form of a processing element scheduler code, the processing element may be a general purpose processor, such as a CPU or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a System-on-a-Chip (SOC).

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer programs. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer program may be stored in or transmitted from one computer readable storage medium to another, for example, a website, computer, server, or data center via a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer readable storage media can be any available media that can be accessed by a computer or data storage devices, such as servers, data centers, etc., that contain an integration of one or more available media. Usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tape), optical media (e.g., DVD), or semiconductor media (e.g., solid State Disk (SSD)), among others.

The embodiment of the application also provides a computer readable storage medium, in which a computer program is stored, which when executed by a processor implements the control method according to any of the method embodiments above.

Embodiments of the present application also provide a computer program product comprising a computer program stored in a computer readable storage medium, from which at least one processor can read the computer program, the at least one processor executing the computer program implementing a control method according to any of the method embodiments described above.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A display device, characterized by comprising:

and the processor is connected with the backlight module and is used for controlling the driving signals of the first light source and the second light source so as to adjust the current color temperature of the display equipment to be a target color temperature, and the target color temperature is determined by the processor according to the picture signal to be displayed.

2. The display device of claim 1, wherein if the backlight module is a direct type backlight module, a color temperature difference between the first light source and the second light source is inversely proportional to a distance between the first light source and the second light source.

3. The display device of claim 1, wherein if the backlight module is a side-in backlight module, a color temperature difference between the first light source and the second light source is inversely proportional to a distance between the first light source and the second light source, and the color temperature difference is directly proportional to a frame width of the side-in backlight module.

4. A control method, characterized by being applied to a display device, comprising:

determining a target current amplitude according to the target brightness;

according to the target color temperature, determining a first current duty cycle corresponding to first driving of a first light source and a second current duty cycle corresponding to second driving of a second light source in a plurality of preset current duty cycles;

and controlling the first driving output to output the target current amplitude according to the first current duty ratio, and controlling the second driving output to output the target current amplitude according to the second current duty ratio so as to adjust the current color temperature of the display device to the target color temperature.

5. The control method according to claim 4, wherein controlling the first drive to output the target current amplitude according to the first current duty cycle and controlling the second drive to output the target current amplitude according to the second current duty cycle includes:

And when the first current duty ratio and the second current duty ratio are both larger than a first threshold value and smaller than or equal to a second threshold value, controlling the first drive to output the target current amplitude according to the first current duty ratio, and controlling the second drive to output the target current amplitude according to the second current duty ratio.

6. The control method according to claim 5, wherein controlling the first drive to output the target current amplitude according to the first current duty cycle and controlling the second drive to output the target current amplitude according to the second current duty cycle includes:

when the first current duty ratio is the first threshold value and the second current duty ratio is the second threshold value, carrying out heightening treatment on the target current amplitude to obtain the target current amplitude after the heightening treatment; and controlling the first drive to output the target current amplitude after the heightening treatment according to the first current duty ratio, and controlling the second drive to output the target current amplitude after the heightening treatment according to the second current duty ratio.

7. The control method according to claim 5, wherein controlling the first drive to output the target current amplitude according to the first current duty cycle and controlling the second drive to output the target current amplitude according to the second current duty cycle includes:

When the first current duty ratio is the second threshold value and the second current duty ratio is the first threshold value, carrying out heightening treatment on the target current amplitude to obtain the target current amplitude after the heightening treatment; and controlling the first drive to output the target current amplitude after the heightening treatment according to the first current duty ratio, and controlling the second drive to output the target current amplitude after the heightening treatment according to the second current duty ratio.

8. The control method according to claim 6, wherein the step of performing the step of increasing the target current amplitude to obtain the increased target current amplitude includes:

and according to the target current amplitude and the target heightening proportion, carrying out heightening treatment on the target current amplitude to obtain the heightened target current amplitude, wherein the target heightening proportion is in a preset heightening proportion interval.

9. The control method according to claim 4, wherein the determining, according to the target color temperature, a first current duty cycle corresponding to a first driving of the first light source and a second current duty cycle corresponding to a second driving of the second light source among a preset plurality of current duty cycles includes:

And inquiring the corresponding relation between a preset current duty cycle and the color temperature according to the target color temperature, and determining the first current duty cycle and the second current duty cycle.

10. The control method according to any one of claims 4 to 9, characterized by further comprising, after the current color temperature of the display device is adjusted to the target color temperature:

and outputting a display picture corresponding to the picture signal to be displayed according to the target color temperature and the target color, wherein the target color is determined according to the picture signal to be displayed.