Composite display device and control method thereof

Abstract

A composite display device comprises a composite display, a brightness acquisition module, a picture management module and a panel control module. The composite display comprises a first display panel and a second display panel which are arranged oppositely. The brightness acquisition module is connected with the composite display and acquires ambient brightness around the composite display. The picture management module is connected with the brightness acquisition module and generates a first picture setting signal and a second picture setting signal according to the ambient brightness. The panel control module is connected with the picture management module and the composite display, and respectively controls the first display panel and the second display panel to project the first picture and the second picture based on the first picture setting signal and the second picture setting signal to form a composite picture. Therefore, the effects of picture optimization and energy conservation can be considered at the same time. The invention further relates to a control method of the composite display device.

Description

Technical Field

[0001] The present disclosure relates to a display device and a control method thereof, and more particularly to a composite display device and a control method thereof. Background Art

[0002] With the development of technology and market demand, outdoor displays can be seen everywhere outdoors, but the picture clarity of outdoor displays under the sun still needs to be improved. The existing solution is to increase the screen brightness to combat the bright ambient light, which not only increases power consumption, but also increases heat energy, resulting in a shortened service life of the outdoor display.

[0003] Among the characteristics of the Cholesteric Liquid Crystal Display (ChLCD), in addition to the planar mode in which the control panel's transmittance allows ambient light to be reflected to provide a picture, there is also a focal conic mode that allows light from the back to penetrate. Because the above two states can be maintained without consuming power, it is called a bistable state. At this time, if an active light-emitting display is placed on the back of the Cholesteric Liquid Crystal Display and combined, a new type of display can be formed. When the ambient light is sufficient, the Cholesteric Liquid Crystal Display is used as the main source for displaying the picture, and in a dim environment, the active light-emitting display is used as the main source for displaying the picture, achieving the effect of saving energy, but the bottleneck encountered when the two displays are displayed at the same time is not considered. For example, based on the stacked structure of the two displays, the transmittance of the front display will greatly affect the luminous intensity of the rear display, making the color of the overall picture display uneven, affecting the user's viewing experience. In view of this, how to adjust the picture to maintain the color uniformity of the existing picture has become a problem that the relevant industry operators are eager to solve. Summary of the invention

[0004] The purpose of the present disclosure is to provide a composite display device and a control method thereof, which uses the ambient brightness around the composite display as a criterion for determining which of the front first display panel or the rear second display panel is to present an image, and determines a second image setting signal for controlling the luminous intensity of the second display panel according to a first image setting signal for controlling the first display panel to switch to different grayscales, thereby achieving image color uniformity. In addition, through the cooperation of the image management module and the panel control module, the first display panel and the second display panel can be driven to display different images respectively, thereby indirectly extending the service life of the composite display and reducing maintenance costs.

[0005] According to one embodiment of the present disclosure, a composite display device is provided, which includes a composite display, a brightness acquisition module, a picture management module and a panel control module. The composite display includes a first display panel and a second display panel. The second display panel is arranged on the first display panel. The brightness acquisition module is connected to the composite display and is used to obtain an ambient brightness around the composite display. The picture management module is connected to the brightness acquisition module. The picture management module generates a first picture setting signal corresponding to the first display panel according to the ambient brightness, and generates a second picture setting signal corresponding to the second display panel according to the first picture setting signal. The panel control module is connected to the picture management module and the composite display. The panel control module controls the first display panel to project a first picture based on the first picture setting signal, and controls the second display panel to project a second picture based on the second picture setting signal, wherein the first picture and the second picture overlap to form a composite picture.

[0006] Other embodiments of the aforementioned implementation are as follows: the aforementioned brightness acquisition module includes a sensing submodule, and the sensing submodule is used to sense the surroundings of the composite display to generate ambient brightness.

[0007] Other embodiments of the aforementioned implementation are as follows: the aforementioned brightness acquisition module includes a remote submodule, and the remote submodule is signal-connected to a cloud server and is used to obtain the ambient brightness from the cloud server according to a position information of the composite display.

[0008] Other embodiments of the aforementioned implementation are as follows: The aforementioned picture management module determines whether the ambient brightness is greater than a reference brightness and generates a brightness determination result. When the brightness determination result is yes, the panel control module controls the first display panel to operate in a reflection mode based on the first picture setting signal, and controls the second display panel to be turned off based on the second picture setting signal. When the brightness determination result is no, the panel control module controls the first display panel to operate in a penetration mode based on the first picture setting signal, and controls the second display panel to be turned on based on the second picture setting signal.

[0009] Other embodiments of the aforementioned implementation manner are as follows: the aforementioned first picture setting signal includes a penetration spectrum data, and the picture management module extracts a first transmittance, a second transmittance, and a third transmittance corresponding to a red spectrum, a green spectrum, and a blue spectrum respectively from the penetration spectrum data, and adjusts a first intensity parameter, a second intensity parameter, and a third intensity parameter corresponding to the red spectrum, the green spectrum, and the blue spectrum in the second picture setting signal according to the first transmittance, the second transmittance, and the third transmittance.

[0010] Other embodiments of the aforementioned implementation are as follows: The aforementioned picture management module obtains a picture content data, and divides the picture content data into a static picture data and a dynamic picture data. The picture management module integrates the static picture data into the first picture setting signal, so that the first picture projected by the first display panel presents a static picture. The picture management module integrates the dynamic picture data into the second picture setting signal, so that the second picture projected by the second display panel presents a dynamic picture, wherein the dynamic picture is different from the static picture.

[0011] Other embodiments of the aforementioned implementation are as follows: The aforementioned picture management module obtains a picture content data, and divides the picture content data into a first depth of field picture data and a second depth of field picture data. The picture management module integrates the first depth of field picture data into the first picture setting signal, so that the first picture projected by the first display panel presents a first depth of field picture. The picture management module integrates the second depth of field picture data into the second picture setting signal, so that the second picture projected by the second display panel presents a second depth of field picture, wherein the second depth of field picture is different from the first depth of field picture.

[0012] Other embodiments of the aforementioned implementation are as follows: the aforementioned composite display further comprises an adhesive layer disposed between the first display panel and the second display panel.

[0013] Other embodiments of the aforementioned embodiment are as follows: the aforementioned first display panel has a first visible area for displaying a first picture, and the second display panel has a second visible area for displaying a second picture. The first visible area at least partially overlaps with the second visible area to form an overlapping area, and an area of ​​the overlapping area accounts for more than 80% of an area of ​​the first display panel.

[0014] Other examples of the aforementioned implementation are as follows: the aforementioned first display panel is a cholesteric liquid crystal display panel.

[0015] Other embodiments of the aforementioned implementation are as follows: the aforementioned second display panel is a mini Light Emitting Diode (mini LED) display panel, a micro Light Emitting Diode (micro LED) display panel, an organic Light Emitting Diode (OLED) display panel or a perovskite light emitting diode (PeLED) display panel.

[0016] According to another embodiment of the present disclosure, a control method for a composite display device is provided, which includes the following steps: obtaining an ambient brightness around a composite display through a brightness acquisition module, wherein the composite display includes a first display panel and a second display panel; generating a first picture setting signal corresponding to the first display panel according to the ambient brightness through a picture management module, and generating a second picture setting signal corresponding to the second display panel according to the first picture setting signal; and controlling the first display panel to project a first picture based on the first picture setting signal and controlling the second display panel to project a second picture based on the second picture setting signal through a panel control module, wherein the first picture and the second picture overlap to form a composite picture.

[0017] Other embodiments of the aforementioned implementation are as follows: the aforementioned brightness acquisition module includes a sensing submodule, and the sensing submodule is used to sense the surroundings of the composite display to generate ambient brightness.

[0018] Other embodiments of the aforementioned implementation are as follows: the aforementioned brightness acquisition module includes a remote submodule, and the remote submodule is signal-connected to a cloud server and is used to obtain the ambient brightness from the cloud server according to a position information of the composite display.

[0019] Other embodiments of the aforementioned implementation are as follows: The aforementioned step of generating a first picture setting signal corresponding to the first display panel according to the ambient brightness by the picture management module and generating a second picture setting signal corresponding to the second display panel according to the first picture setting signal further includes: determining whether the ambient brightness is greater than a reference brightness by the picture management module to generate a brightness judgment result. When the brightness judgment result is yes, the panel control module controls the first display panel to operate in a reflection mode based on the first picture setting signal, and controls the second display panel to be turned off based on the second picture setting signal. When the brightness judgment result is no, the panel control module controls the first display panel to operate in a penetration mode based on the first picture setting signal, and controls the second display panel to be turned on based on the second picture setting signal.

[0020] Other embodiments of the aforementioned implementation are as follows: the aforementioned first picture setting signal includes a penetration spectrum data. The step of generating a first picture setting signal corresponding to the first display panel according to the ambient brightness through the picture management module and generating a second picture setting signal corresponding to the second display panel according to the first picture setting signal further includes: extracting a first transmittance, a second transmittance, and a third transmittance corresponding to a red spectrum, a green spectrum, and a blue spectrum from the penetration spectrum data through the picture management module, and adjusting a first intensity parameter, a second intensity parameter, and a third intensity parameter corresponding to the red spectrum, the green spectrum, and the blue spectrum in the second picture setting signal according to the first transmittance, the second transmittance, and the third transmittance.

[0021] Other embodiments of the aforementioned implementation method are as follows: the aforementioned step of generating a first picture setting signal corresponding to the first display panel according to the ambient brightness through the picture management module and generating a second picture setting signal corresponding to the second display panel according to the first picture setting signal further includes the following steps: obtaining a picture content data through the picture management module, and dividing the picture content data into a static picture data and a dynamic picture data; integrating the static picture data into the first picture setting signal through the picture management module, so that the first picture projected by the first display panel presents a static picture; and integrating the dynamic picture data into the second picture setting signal through the picture management module, so that the second picture projected by the second display panel presents a dynamic picture, wherein the dynamic picture is different from the static picture.

[0022] Other embodiments of the aforementioned implementation manner are as follows: the aforementioned step of generating a first picture setting signal corresponding to the first display panel according to the ambient brightness through the picture management module and generating a second picture setting signal corresponding to the second display panel according to the first picture setting signal further includes the following steps: obtaining a picture content data through the picture management module, and dividing the picture content data into a first depth of field picture data and a second depth of field picture data; integrating the first depth of field picture data into the first picture setting signal through the picture management module, so that the first picture projected by the first display panel presents a first depth of field picture; and integrating the second depth of field picture data into the second picture setting signal through the picture management module, so that the second picture projected by the second display panel presents a second depth of field picture, wherein the second depth of field picture is different from the first depth of field picture. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a composite display device according to a first embodiment of the present disclosure is shown;

[0024] Figure 2 A cross-sectional view of a composite display of the present disclosure is shown;

[0025] Figure 3 Draw Figure 2 A top view of a composite display;

[0026] Figure 4 A schematic flow chart showing a control method of a composite display device according to a second embodiment of the present disclosure is shown;

[0027] Figure 5 Draw Figure 4 A flow chart of the steps of generating a first picture setting signal and a second picture setting signal in a control method of a composite display device;

[0028] Figure 6 A schematic diagram illustrating a penetration spectrum of a first display panel of the present disclosure;

[0029] Figure 7 A schematic diagram showing spectrum-luminous intensity of a second display panel of the present disclosure;

[0030] Fig. 8A A schematic diagram showing a static image of a first display panel of the present disclosure;

[0031] Figure 8B A schematic diagram illustrating a dynamic image of a second display panel of the present disclosure;

[0032] Figure 8C A schematic diagram illustrating a composite screen of a composite display according to the present disclosure;

[0033] Fig.9A A schematic diagram illustrating a first depth of field image of a first display panel of the present disclosure;

[0034] Fig. 9B A schematic diagram illustrating a second depth of field image of a second display panel of the present disclosure; and

[0035] Fig. 9C A schematic diagram illustrating a composite screen of a composite display according to the present disclosure is shown.

[0036] The reference numerals are described as follows:

[0037] 100: Composite display device

[0038] 110: Composite display

[0039] 1101: Screen content data

[0040] 111: First display panel

[0041] 112: Second display panel

[0042] 113: Adhesive layer

[0043] 120: Brightness acquisition module

[0044] 1201: Ambient brightness

[0045] 121: Sensing submodule

[0046] 122: Remote submodule

[0047] 130: Screen management module

[0048] 1301: Reference brightness

[0049] 1302: Artificial Intelligence Algorithms

[0050] 131: First picture setting signal

[0051] 1311: Penetrating Spectrum Data

[0052] 132: Second picture setting signal

[0053] 140: Panel control module

[0054] 141: First control signal

[0055] 142: Second control signal

[0056] 150: Cloud Server

[0057] 200: Control method of composite display device

[0058] M1: Still picture

[0059] M2: Dynamic picture

[0060] M3: First depth of field picture

[0061] M4: Second depth of field

[0062] MC1, MC2: Composite screen

[0063] P1: First strength parameter

[0064] P2: Second intensity parameter

[0065] P3: The third intensity parameter

[0066] R1: First visible area

[0067] R2: Second visual area

[0068] R3: Overlapping area

[0069] S01, S02, S021, S022, S023, S03: Steps

[0070] BS: Blue Spectrum

[0071] GS: Green Spectrum

[0072] RS: Red spectrum

[0073] X, Y, Z: Direction DETAILED DESCRIPTION

[0074] The following will describe multiple embodiments of the present disclosure with reference to the accompanying drawings. For the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present disclosure. That is, in some embodiments of the present disclosure, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and elements will be depicted in a simple schematic manner in the drawings; and repeated elements may be represented by the same number.

[0075] In addition, in this article, when a certain element (or unit or module, etc.) is "connected / linked" to another element, it may refer to that the element is directly connected / linked to another element, or it may refer to that a certain element is indirectly connected / linked to another element, that is, there are other elements between the element and the other element. When it is explicitly stated that a certain element is "directly connected / linked" to another element, it means that there are no other elements between the element and the other element. The terms first, second, third, etc. are only used to describe different elements, and there is no restriction on the elements themselves. Therefore, the first element can also be renamed as the second element. Moreover, the combination of elements / units / circuits in this article is not a generally known, conventional or conventional combination in this field. Whether the elements / units / circuits themselves are conventional cannot be used to determine whether their combination relationship is easy to be easily completed by ordinary knowledgeable people in the technical field.

[0076] Please also read Figure 1 , Figure 2 and Figure 3 ,in Figure 1 A schematic diagram of a composite display device according to a first embodiment of the present disclosure is shown; Figure 2 A cross-sectional view showing a composite display of the present disclosure; and Figure 3 Draw Figure 2 It should be noted that, in order to facilitate the description of the structural configuration of each component of the composite display device 100, Figure 1 The composite display 110 is presented in an exploded view. Figure 1 As shown, the composite display device 100 includes a composite display 110 , a brightness acquisition module 120 , a picture management module 130 and a panel control module 140 .

[0077] The composite display 110 includes a first display panel 111 and a second display panel 112. The first display panel 111 is disposed in front of the second display panel 112 along a stacking direction (i.e., direction Z), and the second display panel 112 is disposed behind the first display panel 111. The brightness acquisition module 120 is electrically connected to the composite display 110, and is used to acquire an ambient brightness 1201 around the composite display 110. The image management module 130 is electrically connected to the brightness acquisition module 120, and acquires the ambient brightness 1201 from the brightness acquisition module 120. The image management module 130 generates a first image setting signal 131 corresponding to the first display panel 111 according to the ambient brightness 1201, and generates a second image setting signal 132 corresponding to the second display panel 112 according to the first image setting signal 131. The panel control module 140 is electrically connected to the image management module 130 and the composite display 110, and receives the first image setting signal 131 and the second image setting signal 132 from the image management module 130. The panel control module 140 feeds a first control signal 141 to the first display panel 111 based on the first picture setting signal 131, and feeds a second control signal 142 to the second display panel 112 based on the second picture setting signal 132. The panel control module 140 controls the first display panel 111 to project a first picture through the first control signal 141, and controls the second display panel 112 to project a second picture through the second control signal 142. Since both the first picture and the second picture are projected in the direction Z, the first picture and the second picture overlap to form a composite picture. In this way, the composite display device 100 of the present disclosure can drive one of the first display panel 111 and the second display panel 112 to display a picture separately, and can also drive the first display panel 111 and the second display panel 112 to display different pictures at the same time, such as presenting static and dynamic pictures in front and back or a stereoscopic effect with different depths of field in front and back, so as to create a composite picture with a variety of visual effects by overlapping pictures.

[0078] like Figure 2As shown, the composite display 110 may further include an adhesive layer 113. The adhesive layer 113 is disposed between the first display panel 111 and the second display panel 112, so that the first display panel 111 is fixed on the second display panel 112. The material of the adhesive layer 113 may be, but is not limited to, optical clear adhesive (OCA) or other suitable light-transmissive adhesive materials. Since the thickness of the adhesive layer 113 is only between tens of microns and hundreds of microns, which can be ignored, the first display panel 111 and the second display panel 112 are closely fitted to avoid interface reflection caused by changes in the refractive index of the air medium, thereby reducing light penetration loss. In other embodiments, the first display panel can be spaced apart from the second display panel, that is, the air medium is retained between the two, so as to reduce the heat conduction between the two panels and the effect of cost control.

[0079] Specifically, the first display panel 111 may be a transmissive reflective display panel, and it may be, for example, a cholesterol liquid crystal display panel, i.e., a display panel in a cholesterol liquid crystal display (Cholesteric Liquid Crystal Display, ChLCD), and the second display panel 112 may be an active light-emitting display panel, and it may be, for example, a sub-millimeter light emitting diode (mini Light Emitting Diode, mini LED) display panel, a micro Light Emitting Diode (micro Light Emitting Diode, micro LED) display panel, an organic light emitting diode (Organic Light Emitting Diode, OLED) or a perovskite light emitting diode (PeLED) display panel, but the present disclosure is not limited thereto.

[0080] like Figure 1 , Figure 3 As shown, the first display panel 111 has a first visible area R1 for displaying a first picture, and the second display panel 112 has a second visible area R2 for displaying a second picture. The first visible area R1 at least partially overlaps the second visible area R2 to form an overlapping area R3, and the area of ​​the overlapping area R3 may account for more than 80% of the area of ​​the first display panel 111 (i.e., the total area of ​​the panel). In this embodiment, the first visible area R1 and the second visible area R2 may be effective pixel areas of the two panels respectively, and the first visible area R1 and the second visible area R2 completely overlap, so as to maximize the overlapping range of the first picture and the second picture.

[0081] In detail, the second display panel 112 may have a second visible area R2 as an effective pixel area and a non-display area (not separately labeled) surrounding the second visible area R2. The second visible area R2 may include a plurality of pixels arranged in multiple rows and columns along directions X and Y, respectively, wherein directions X, Y and Z are perpendicular to each other. Each pixel may include a light-emitting element (e.g., mini LED, micro LED, OLED or PeLED) and an active element (e.g., a thin film transistor (TFT)). According to different product requirements, the plurality of light-emitting elements may include a plurality of light-emitting elements of different colors or a plurality of light-emitting elements of a single color. If a plurality of light-emitting elements are used to display pixels, the plurality of light-emitting elements may include a plurality of red light-emitting elements, a plurality of green light-emitting elements and a plurality of blue light-emitting elements. The range of the non-display area may be the area between the second visible area R2 and the frame of the second display panel 112. The non-display area may be provided with electronic elements (e.g., driving circuits, chips, conductive wires, etc.) to assist the second visible area R2, but the present disclosure is not limited thereto.

[0082] In some embodiments, the composite display device 100 may further include a cloud server 150. The brightness acquisition module 120 may include a sensing submodule 121 and a remote submodule 122. The sensing submodule 121 may be, but not limited to, a brightness sensor. The sensing submodule 121 is electrically connected to the composite display 110, and may be used to sense the surroundings of the composite display 110 to generate an ambient brightness 1201. The remote submodule 122 may be, but not limited to, a wireless communicator. The remote submodule 122 is connected to the cloud server 150 (e.g., a weather forecast service) via an Internet signal, and may be used to obtain the ambient brightness 1201 from the cloud server 150 according to the location information of the composite display 110. In other embodiments, in order to reduce system cost, the brightness acquisition module only needs to be configured with either the sensing submodule or the remote submodule to obtain the ambient brightness.

[0083] In some embodiments, the picture management module 130 may be, but not limited to, a timing controller (TCON), and the panel control module 140 may be, but not limited to, a driver integrated circuit (IC). The picture management module 130 may include a processor and a memory. The memory stores a reference brightness 1301 and an artificial intelligence (AI) algorithm 1302. The ambient brightness 1201 and the reference brightness 1301 may be brightness values, and in other embodiments, the ambient brightness and the reference brightness may also be illuminance values, and the illuminance value may be, for example, but not limited to, 2000 lux. The artificial intelligence algorithm 1302 may be, but not limited to, a deep learning algorithm or a machine learning algorithm. The processor is electrically connected to the memory, and performs two picture management functions based on the reference brightness 1301 and the artificial intelligence algorithm 1302, one of which is picture brightness correction, and the other is picture content classification.

[0084] Regarding the picture brightness correction, the picture management module 130 generates a first picture setting signal 131 according to the ambient brightness 1201, and sets the transmittance of the first display panel 111 (i.e., adjusts the grayscale value of the first picture) through the first picture setting signal 131, wherein the first picture setting signal 131 may include a transmittance spectrum data. After receiving the first picture setting signal 131 fed by the picture management module 130, the panel control module 140 may modify the transmittance of the first display panel 111 using the first control signal 141. It should be noted that due to various considerations of material, manufacturing and structural configuration, the transmittance of the first display panel 111 in the visible light band may be reduced, so the transmittance of the first display panel 111 for different color spectra is different. Therefore, the picture management module 130 can extract a first transmittance, a second transmittance, and a third transmittance corresponding to a red spectrum, a green spectrum, and a blue spectrum respectively from the transmittance spectrum data of the first picture setting signal 131, and adjust a first intensity parameter, a second intensity parameter, and a third intensity parameter corresponding to the red spectrum, the green spectrum, and the blue spectrum in the second picture setting signal 132 according to the first transmittance, the second transmittance, and the third transmittance. After receiving the second picture setting signal 132 fed by the picture management module 130, the panel control module 140 transmits a second control signal 142 to the second display panel 112 based on the second picture setting signal 132 to adjust the light intensity of the red light emitting element, the green light emitting element, and the blue light emitting element, so that the composite picture of the composite display 110 can achieve picture color uniformity.

[0085] In some embodiments, the image management module 130 may compare the ambient brightness 1201 with the reference brightness 1301. When the ambient brightness 1201 is greater than the reference brightness 1301 (i.e., the ambient light is strong), the image management module 130 uses the first image setting signal 131 to set the first display panel 111 located in the front to a reflection mode (Planar Mode), and uses the second image setting signal 132 to turn off the second display panel 112. In the reflection mode, the cholesterol liquid crystal is in a planar state (Planar State), and the first display panel 111 reflects the ambient light to project the first image. On the contrary, when the ambient brightness 1201 is less than the reference brightness 1301 (i.e., the ambient light is weak), the image management module 130 uses the first image setting signal 131 to set the first display panel 111 to a penetration mode (Focal Conic Mode), and uses the second image setting signal 132 to turn on the second display panel 112. In the transmission mode, the cholesterol liquid crystal is in a focal conic state, so the second picture projected by the second display panel 112 at the rear can penetrate the first display panel 111. Therefore, when the ambient light changes, the picture management module 130 can feed the first picture setting signal 131 and the second picture setting signal 132 to the panel control module 140 in a timely manner. The panel control module 140 feeds the first control signal 141 and the second control signal 142 to the first display panel 111 and the second display panel 112 respectively based on the first picture setting signal 131 and the second picture setting signal 132, thereby controlling the composite display 110 to switch to different display modes, which not only provides high picture quality, but also achieves the effect of saving energy.

[0086] Regarding the classification of screen content, in some embodiments, the screen management module 130 may obtain a screen content data 1101 from an external controller (not shown separately), and use an artificial intelligence algorithm 1302 to distinguish the screen content data 1101 into static screen data and dynamic screen data. Specifically, the artificial intelligence algorithm 1302 classifies the screen content data 1101 into static screen data and dynamic screen data by identifying the difference between the static content and the dynamic content in the previous and next frames. Then, the screen management module 130 may integrate the static screen data into the first screen setting signal 131, so that the first screen projected by the first display panel 111 presents a static screen. The screen management module 130 may integrate the dynamic screen data into the second screen setting signal 132, so that the second screen projected by the second display panel 112 presents a dynamic screen, wherein the dynamic screen is different from the static screen.

[0087] In some embodiments, the image management module 130 may also use the artificial intelligence algorithm 1302 to distinguish the image content data 1101 into first depth of field image data and second depth of field image data according to the different depth of field (DOF) sizes in the image content data 1101. Then, the image management module 130 may integrate the first depth of field image data into the first image setting signal 131, so that the first image projected by the first display panel 111 presents the first depth of field image. The image management module 130 integrates the second depth of field image data into the second image setting signal 132, so that the second image projected by the second display panel 112 presents the second depth of field image, wherein the second depth of field image is different from the first depth of field image. The method for controlling the composite display 110 will be described in detail below with reference to the accompanying drawings.

[0088] Please also read Figure 1 , Figure 4 and Figure 5 ,in Figure 4 A schematic flow chart showing a control method of a composite display device according to a second embodiment of the present disclosure; and Figure 5 Draw Figure 4 A flow chart showing the steps of generating a first picture setting signal and a second picture setting signal in a control method of a composite display device. Figure 1 and Figure 4 As shown, the control method 200 of the composite display device can be automatically executed by the composite display device 100 , and includes the following steps S01 , S02 , and S03 .

[0089] In step S01 , the brightness acquisition module 120 is used to acquire the ambient brightness 1201 around the composite display 110 .

[0090] In step S02 , the image management module 130 generates a first image setting signal 131 corresponding to the first display panel 111 according to the ambient brightness 1201 , and generates a second image setting signal 132 corresponding to the second display panel 112 according to the first image setting signal 131 .

[0091] Step S03 is to feed the first control signal 141 to the first display panel 111 based on the first picture setting signal 131 through the panel control module 140, and control the first display panel 111 to project the first picture through the first control signal 141; and feed the second control signal 142 to the second display panel 112 based on the second picture setting signal 132 through the panel control module 140, and control the second display panel 112 to project the second picture through the second control signal 142. In this way, the control method 200 of the composite display device of the present disclosure can drive one of the first display panel 111 and the second display panel 112 to display a picture separately, and can also drive the first display panel 111 and the second display panel to display the first picture and the second picture respectively at the same time, so that the first picture overlaps the second picture to create a composite picture with various visual effects.

[0092] like Figure 5 As shown, step S02 may further include step S021, step S022 and step S023. Step S021 is to generate a brightness judgment result by determining whether the ambient brightness 1201 is greater than the reference brightness 1301 through the picture management module 130. When the brightness judgment result is "yes", step S022 is executed. In step S022, the panel control module 140 controls the first display panel 111 to operate in the reflection mode based on the first picture setting signal 131, and controls the second display panel 112 to be turned off based on the second picture setting signal 132. On the contrary, when the brightness judgment result is "no", step S023 is executed. In step S023, the panel control module 140 controls the first display panel 111 to operate in the penetration mode based on the first picture setting signal 131, and controls the second display panel 112 to be turned on based on the second picture setting signal 132. Since the first display panel 111 has a bi-stable state (a planar arrangement state and a focal conic arrangement state), and does not require other backlight sources to increase the brightness and display image in the reflective mode, power is consumed only when refreshing the screen (switching the cholesterol liquid crystal state), thereby significantly reducing the overall power consumption of the composite display 110.

[0093] Please continue to read Figure 1 , Figure 6 and Figure 7 ,in Figure 6 A schematic diagram showing a transmission spectrum of a first display panel of the present disclosure; and Figure 7 A schematic diagram showing the spectrum-luminous intensity of the second display panel of the present disclosure is shown. Figure 1 , Figure 6 and Figure 7As shown, step S02 may further include extracting, through the picture management module 130, the first transmittance, the second transmittance and the third transmittance corresponding to the red spectrum RS, the green spectrum GS and the blue spectrum BS respectively from the transmittance spectrum data 1311 of the first picture setting signal 131, and adjusting the first intensity parameter P1, the second intensity parameter P2 and the third intensity parameter P3 corresponding to the red spectrum RS, the green spectrum GS and the blue spectrum BS in the second picture setting signal 132 according to the first transmittance, the second transmittance and the third transmittance.

[0094] In detail, when the second display panel 112 projects the second image onto the first display panel 111, the transmittance of the first display panel 111 is not 100%. In some frequency bands of visible light, such as the green spectrum GS (corresponding to the wavelength range of 500nm to 580nm) and the blue spectrum BS (corresponding to the wavelength range of 400nm to 500nm), lower transmittance may occur. At this time, the image management module 130 executes an image brightness correction program to correct the brightness of the second image of the second display panel 112. In the image correction program, the image management module 130 adjusts the luminous intensity of the second display panel 112 for different color spectra according to the ratio of the transmittance changes of the first display panel 111 for different color spectra (i.e., the first transmittance, the second transmittance, and the third transmittance). For example, the transmittance of the first display panel 111 for the red spectrum RS (corresponding to the wavelength range of 580nm to 680nm) is 3 times higher than the transmittance of the green spectrum GS and the blue spectrum BS (e.g. Figure 6 As shown), the picture management module 130 reduces the value of the first intensity parameter P1 corresponding to the red spectrum RS in the second picture setting signal 132, so that the panel control module 140 transmits a second control signal 142 to the second display panel 112 based on the second picture setting signal 132, so as to reduce the luminous intensity of the red light emitting element to 1 / 3 of the original, thereby maintaining the color uniformity of the picture.

[0095] Please continue to read Figure 1 , Fig. 8A , Figure 8B and Figure 8C ,in Fig. 8A A schematic diagram showing a static image of a first display panel of the present disclosure; Figure 8B A schematic diagram showing a dynamic image of a second display panel of the present disclosure; and Figure 8C A schematic diagram of a composite screen of a composite display according to the present disclosure is shown. Figure 1 , Fig. 8A , Figure 8B and Figure 8CAs shown, step S02 may further include obtaining the picture content data 1101 through the picture management module 130, and dividing the picture content data 1101 into static picture data and dynamic picture data; integrating the static picture data into the first picture setting signal 131 through the picture management module 130, so that the first picture projected by the first display panel 111 presents a static picture M1; and integrating the dynamic picture data into the second picture setting signal 132 through the picture management module 130, so that the second picture projected by the second display panel 112 presents a dynamic picture M2, wherein the dynamic picture M2 is different from the static picture M1, and overlaps with the static picture M1 to form a composite picture MC1. In detail, in order to control the overall energy consumption of the composite display 110, the picture management module 130 executes a picture classification program to distinguish the picture content to be projected (i.e., the picture content data 1101) into the static picture M1 and the dynamic picture M2 according to the difference between the static content and the dynamic content in the previous and next frames. The static picture M1 represents that the picture does not need to be updated within a certain period of time, and is presented by the first display panel 111 located in the front. The first display panel 111 does not consume power to maintain the image under the bi-stable characteristic. The dynamic image M2 represents that the content of each image update will be different, and the content that needs to be changed will be limited to the minimum range and presented through the second display panel 112 located at the rear. In this way, the energy consumption can also be reduced when the range of the light source is reduced, and even the heat energy can be reduced, which is equivalent to indirectly extending the service life of the composite display 110 and reducing the maintenance cost.

[0096] Please continue to read Figure 1 , Fig.9A , Fig. 9B and Fig. 9C ,in Fig.9A A schematic diagram illustrating a first depth of field image of a first display panel of the present disclosure; Fig. 9B A schematic diagram illustrating a second depth of field image of a second display panel of the present disclosure; and Fig. 9C A schematic diagram of a composite screen of a composite display according to the present disclosure is shown. Figure 1 , Fig.9A , Fig. 9B and Fig. 9CAs shown, step S02 may further include obtaining the picture content data 1101 through the picture management module 130, and distinguishing the picture content data 1101 into first depth of field picture data and second depth of field picture data; integrating the first depth of field picture data into the first picture setting signal 131 through the picture management module 130, so that the first picture projected by the first display panel 111 presents a first depth of field picture M3; and integrating the second depth of field picture data into the second picture setting signal 132 through the picture management module 130, so that the second picture projected by the second display panel 112 presents a second depth of field picture M4, wherein the second depth of field picture M4 is different from the first depth of field picture M3, and overlaps with the first depth of field picture M3 to form a composite picture MC2. In detail, in order to make the composite display 110 present a stereoscopic effect of different depths of field, the picture management module 130 can distinguish the desired projected picture content (i.e., the picture content data 1101) into the first depth of field picture M3 and the second depth of field picture M4. The first depth of field picture M3 may be the main character part in the picture, and the second depth of field picture M4 may be the supporting character part in the picture. The purpose of depth of field classification is to highlight the main character to achieve the effect of attracting attention. In other embodiments, the first display panel may also project the second depth of field picture, and the second display panel may also project the first depth of field picture. As for which of the first display panel and the second display panel is used to project the first depth of field picture and the other to project the second depth of field picture, it depends on the brightness of the external environment and the attributes of the picture content. In this way, the control method 200 of the composite display device of the present disclosure achieves multiple functions of environmental sensing, picture management and display control through the brightness acquisition module 120, the picture management module 130 and the panel control module 140, so that the composite display 110 can present a variety of display effects and increase the readability of the picture.

[0097] In summary, the composite display device and control method thereof provided by the present disclosure have the following advantages: First, the respective characteristics of the first display panel and the second display panel are utilized to achieve the effects of picture optimization and energy saving. Second, the color uniformity of the picture is maintained. Since the composite display can produce different images on different displays at the same time, the present disclosure can control the image to produce different effects, such as combining static and dynamic images or creating a three-dimensional effect with different depths of field. Third, according to the picture management, the first display panel in front and the second display panel in the back are selected to project the picture, whether it is projected separately or simultaneously, so that the composite display has a variety of display modes.

[0098] Although the present disclosure has been disclosed in the above implementation mode, it is not intended to limit the present disclosure. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the following claims.

Claims

1. A composite display device, characterized in that: Include: A composite display comprising: a first display panel; and A second display panel, disposed opposite to the first display panel; a brightness acquisition module connected to the composite display and used to acquire an ambient brightness around the composite display; a picture management module connected to the brightness acquisition module, the picture management module generating a first picture setting signal corresponding to the first display panel according to the ambient brightness, and generating a second picture setting signal corresponding to the second display panel according to the first picture setting signal; and a panel control module connected to the picture management module and the composite display, the panel control module controlling the first display panel to project a first picture based on the first picture setting signal, and controlling the second display panel to project a second picture based on the second picture setting signal; The first picture and the second picture overlap to form a composite picture.

2. The composite display device according to claim 1, characterized in that: The brightness acquisition module includes a sensing submodule, and the sensing submodule is used for sensing the surroundings of the composite display to generate the ambient brightness.

3. The composite display device according to claim 1, characterized in that: The brightness acquisition module includes a remote submodule, and the remote submodule is signal-connected to a cloud server and is used to obtain the ambient brightness from the cloud server according to position information of the composite display.

4. The composite display device according to claim 1, characterized in that: The picture management module determines whether the ambient brightness is greater than a reference brightness and generates a brightness determination result; Wherein, when the brightness determination result is yes, the panel control module controls the first display panel to operate in a reflective mode based on the first picture setting signal, and controls the second display panel to be turned off based on the second picture setting signal; When the brightness determination result is negative, the panel control module controls the first display panel to operate in a penetration mode based on the first picture setting signal, and controls the second display panel to turn on based on the second picture setting signal.

5. The composite display device according to claim 1, wherein: The first picture setting signal includes a penetration spectrum data, and the picture management module extracts a first transmittance, a second transmittance, and a third transmittance corresponding to a red spectrum, a green spectrum, and a blue spectrum respectively from the penetration spectrum data, and adjusts a first intensity parameter, a second intensity parameter, and a third intensity parameter corresponding to the red spectrum, the green spectrum, and the blue spectrum in the second picture setting signal according to the first transmittance, the second transmittance, and the third transmittance.

6. The composite display device according to claim 1, characterized in that: The picture management module obtains picture content data and divides the picture content data into static picture data and dynamic picture data; The picture management module integrates the static picture data into the first picture setting signal, so that the first picture projected by the first display panel presents a static picture; and The picture management module integrates the dynamic picture data into the second picture setting signal, so that the second picture projected by the second display panel presents a dynamic picture, wherein the dynamic picture is different from the static picture.

7. The composite display device according to claim 1, wherein: The picture management module obtains picture content data, and divides the picture content data into a first depth of field picture data and a second depth of field picture data; The image management module integrates the first depth-of-field image data into the first image setting signal, so that the first image projected by the first display panel presents a first depth-of-field image; and The image management module integrates the second depth-of-field image data into the second image setting signal, so that the second image projected by the second display panel presents a second depth-of-field image, wherein the second depth-of-field image is different from the first depth-of-field image.

8. The composite display device according to claim 1, characterized in that: The composite display further comprises: An adhesive layer is disposed between the first display panel and the second display panel.

9. The composite display device according to claim 1, characterized in that: The first display panel has a first visible area for displaying the first image, and the second display panel has a second visible area for displaying the second image. The first visible area at least partially overlaps with the second visible area to form an overlapping area, and an area of ​​the overlapping area accounts for more than 80% of an area of ​​the first display panel.

10. The composite display device according to claim 1, characterized in that: The first display panel is a cholesteric liquid crystal display panel.

11. The composite display device according to claim 1, characterized in that: The second display panel is a millimeter light emitting diode display panel, a micro light emitting diode display panel, an organic light emitting diode display panel or a perovskite light emitting diode display panel.

12. A control method for a composite display device, characterized in that: Include: Acquiring an ambient brightness around a composite display through a brightness acquisition module, wherein the composite display comprises a first display panel and a second display panel; Generate a first picture setting signal corresponding to the first display panel according to the ambient brightness through a picture management module, and generate a second picture setting signal corresponding to the second display panel according to the first picture setting signal; and Controlling the first display panel to project a first image based on the first image setting signal, and controlling the second display panel to project a second image based on the second image setting signal by a panel control module; The first picture and the second picture overlap to form a composite picture.

13. The control method of the composite display device according to claim 12, characterized in that: The brightness acquisition module includes a sensing submodule, and the sensing submodule is used for sensing the surroundings of the composite display to generate the ambient brightness.

14. The control method of the composite display device according to claim 12, characterized in that: The brightness acquisition module includes a remote submodule, and the remote submodule is signal-connected to a cloud server and is used to obtain the ambient brightness from the cloud server according to position information of the composite display.

15. The control method of the composite display device according to claim 12, characterized in that: The step of generating the first picture setting signal corresponding to the first display panel according to the ambient brightness by the picture management module and generating the second picture setting signal corresponding to the second display panel according to the first picture setting signal further includes: Determine whether the ambient brightness is greater than a reference brightness by the picture management module to generate a brightness determination result; Wherein, when the brightness determination result is yes, the panel control module controls the first display panel to operate in a reflective mode based on the first picture setting signal, and controls the second display panel to be turned off based on the second picture setting signal; When the brightness determination result is negative, the panel control module controls the first display panel to operate in a penetration mode based on the first picture setting signal, and controls the second display panel to turn on based on the second picture setting signal.

16. The control method of the composite display device according to claim 12, characterized in that: The first picture setting signal includes a penetration spectrum data, and the step of generating the first picture setting signal corresponding to the first display panel according to the ambient brightness by the picture management module and generating the second picture setting signal corresponding to the second display panel according to the first picture setting signal further includes: A first transmittance, a second transmittance, and a third transmittance respectively corresponding to a red spectrum, a green spectrum, and a blue spectrum are extracted from the transmittance spectrum data by the picture management module, and a first intensity parameter, a second intensity parameter, and a third intensity parameter corresponding to the red spectrum, the green spectrum, and the blue spectrum in the second picture setting signal are adjusted according to the first transmittance, the second transmittance, and the third transmittance.

17. The control method of the composite display device according to claim 12, characterized in that: The step of generating the first picture setting signal corresponding to the first display panel according to the ambient brightness by the picture management module and generating the second picture setting signal corresponding to the second display panel according to the first picture setting signal further includes: Obtaining a picture content data through the picture management module, and dividing the picture content data into a static picture data and a dynamic picture data; The static image data is integrated into the first image setting signal by the image management module, so that the first image projected by the first display panel presents a static image; and The dynamic image data is integrated into the second image setting signal through the image management module, so that the second image projected by the second display panel presents a dynamic image, wherein the dynamic image is different from the static image.

18. The control method of the composite display device according to claim 12, characterized in that: The step of generating the first picture setting signal corresponding to the first display panel according to the ambient brightness by the picture management module and generating the second picture setting signal corresponding to the second display panel according to the first picture setting signal further includes: Obtaining a picture content data through the picture management module, and dividing the picture content data into a first depth of field picture data and a second depth of field picture data; The first depth-of-field image data is integrated into the first image setting signal by the image management module, so that the first image projected by the first display panel presents a first depth-of-field image; and The second depth-of-field image data is integrated into the second image setting signal by the image management module, so that the second image projected by the second display panel presents a second depth-of-field image, wherein the second depth-of-field image is different from the first depth-of-field image.

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