Composite display device and method for controlling the same

Abstract

To provide a composite display device.SOLUTION: A composite display device comprises: a composite display that includes a first display panel and a second display panel provided in an aligned state; a brightness acquisition module that is connected to the composite display and acquires an ambient brightness around the composite display; a screen management module that is connected to the brightness acquisition module and generates a first screen setting signal and a second screen setting signal according to the ambient brightness; and a panel controlling module that is connected to the screen management module and the composite display, and respectively controls the first display panel and the second display panel to display a first screen and a second screen on the basis of the first screen setting signal and the second screen setting signal to form a composite screen. This configuration can achieve optimization of the screens and the effective energy saving.SELECTED DRAWING: Figure 1

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 technology]

[0002] With the current development of science and technology and market demand, outdoor displays can be viewed anywhere outdoors, but the screen resolution of outdoor displays illuminated by sunlight still has room to be improved. The existing solution is to counter the bright ambient light by increasing the brightness of the screen, which not only increases the power consumption but also increases the heat energy and shortens the service life of outdoor displays.

[0003] The characteristics of a cholesteric liquid crystal display (ChLCD) include a planar mode of the screen by controlling the reflectance of the panel to reflect the ambient light, and a focal conic mode that allows the light from the rear to pass through. The above two modes can be maintained without consuming power, and are called bi-stable modes. In this case, a new display can be formed by combining an active light-emitting display disposed on the rear side of the cholesteric liquid crystal display. When the ambient light is sufficient, the cholesteric liquid crystal display is used as the main source for displaying the screen, and in a dark environment, the active light-emitting display is used as the main source for displaying the screen, achieving the effect of saving energy, but not taking into account the bottleneck that occurs when the above two displays display the screen simultaneously. For example, based on the stacked structure of the above two displays, the transmittance of the front display greatly affects the luminous intensity of the rear display, causing the colors displayed on the entire screen to be non-uniform, which affects the user's viewing experience. In view of this, how to adjust the screen to maintain the color uniformity of the existing screen is currently an issue that relevant industry personnel are urgently trying to solve. Summary of the Invention [Means for solving the problem]

[0004] The object of the present disclosure is to provide a composite display device and a control method thereof, which utilizes the environmental brightness around the composite display as a criterion for determining whether the first display panel at the front or the second display panel at the rear will display the screen, and determines a second screen setting signal for controlling the emission intensity of the second display panel based on a first screen setting signal for controlling the first display panel to switch to different gradations, thereby achieving uniformity in the color of the screen, and driving the first display panel and the second display panel to display different screens respectively through cooperation between a screen management module and a panel control module, thereby indirectly extending the service life of the composite display and reducing maintenance costs.

[0005] According to an embodiment of the present disclosure, there is provided a composite display device comprising: a composite display including a first display panel and a second display panel aligned with the first display panel; a brightness acquisition module connected to the composite display and for acquiring environmental brightness around the composite display; a screen management module connected to the brightness acquisition module and for generating a first screen setting signal corresponding to the first display panel based on the environmental brightness, and for generating a second screen setting signal corresponding to the second display panel based on the first screen setting signal; and a panel control module connected to the screen management module and the composite display and for controlling the first display panel to project a first screen based on the first screen setting signal, and for controlling the second display panel to project a second screen based on the second screen setting signal, wherein the first screen and the second screen overlap to form a composite screen.

[0006] As another example of the above embodiment, the luminance acquisition module includes a sensing sub-module for sensing the surroundings of the composite display to generate an ambient luminance.

[0007] As another example of the above embodiment, the luminance acquisition module includes a remote sub-module, signally connected to a cloud server, for acquiring the environmental luminance from the cloud server based on the position information of the composite display.

[0008] As another example of the above embodiment, the screen management module determines whether the environmental brightness is greater than a reference brightness to generate a brightness judgment result, and if the brightness judgment result is YES, the panel control module controls the first display panel to be operated in a reflective mode based on a first screen setting signal, and controls the second display panel to be closed based on a second screen setting signal, and if the brightness judgment result is NO, the panel control module controls the first display panel to be operated in a transparent mode based on the first screen setting signal, and controls the second display panel to be opened based on the second screen setting signal.

[0009] As another example of the above embodiment, the first screen setting signal includes transmittance frequency spectrum data, and the screen management module captures a first transmittance section, a second transmittance section and a third transmittance section corresponding to a red spectrum, a green spectrum and a blue spectrum, respectively, from the transmittance frequency 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 screen setting signal according to the first transmittance section, the second transmittance section and the third transmittance section.

[0010] As another example of the above embodiment, the screen management module obtains screen content data and divides it into static screen data and dynamic screen data, the screen management module matches the static screen data to a first screen setting signal, and displays the first screen projected by the first display panel as a static screen, and the screen management module matches the dynamic screen data to a second screen setting signal, and displays the second screen projected by the second display panel as a dynamic screen different from the static screen.

[0011] As another example of the above embodiment, the screen management module acquires screen content data and divides it into first depth of field screen data and second depth of field screen data, the screen management module matches the first depth of field screen data to a first screen setting signal, and displays the first screen projected by the first display panel on the first depth of field screen, and the screen management module matches the second depth of field screen data to a second screen setting signal, and displays the second screen projected by the second display panel on a second depth of field screen different from the first depth of field screen.

[0012] As another example of the above embodiment, the composite display further includes an adhesive layer disposed between the first display panel and the second display panel.

[0013] As another example of the above embodiment, the first display panel has a first visible area for displaying a first screen, and the second display panel has a second visible area for displaying a second screen, the first visible area at least partially overlaps with the second visible area to form an overlapping area, and the area of ​​the overlapping area occupies more than 80% of the area of ​​the first display panel.

[0014] As another example of the above embodiment, the first display panel is a cholesteric liquid crystal display panel.

[0015] As another example of the above embodiment, the second display panel is a submillimeter 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, there is provided a control method for a composite display device, the control method including: acquiring, by a brightness acquisition module, an environmental brightness around a composite display including a first display panel and a second display panel; generating, by a screen management module, a first screen setting signal corresponding to the first display panel based on the environmental brightness, and generating a second screen setting signal corresponding to the second display panel based on the first screen setting signal; and controlling, by a panel control module, the first display panel to project a first screen based on the first screen setting signal, and controlling the second display panel to project a second screen based on the second screen setting signal, wherein the first screen and the second screen overlap to form a composite screen.

[0017] As another example of the above embodiment, the luminance acquisition module includes a sensing sub-module for sensing the surroundings of the composite display to generate an ambient luminance.

[0018] As another example of the above embodiment, the luminance acquisition module includes a remote sub-module, signally connected to a cloud server, for acquiring the environmental luminance from the cloud server based on the position information of the composite display.

[0019] As another example of the above embodiment, the process of generating a first screen setting signal corresponding to the first display panel based on the environmental luminance by the screen management module and generating a second screen setting signal corresponding to the second display panel based on the first screen setting signal further includes a process of determining whether the environmental luminance is greater than a reference luminance by the screen management module to generate a luminance judgment result, and if the luminance judgment result is YES, the panel control module controls the first display panel to be operated in a reflective mode based on the first screen setting signal, and controls the second display panel to be closed based on the second screen setting signal, and if the luminance judgment result is NO, the panel control module controls the first display panel to be operated in a transparent mode based on the first screen setting signal, and controls the second display panel to be opened based on the second screen setting signal.

[0020] As another example of the above embodiment, the first screen setting signal includes transmittance frequency spectrum data, and the process of generating a first screen setting signal corresponding to the first display panel based on the environmental brightness by a screen management module and generating a second screen setting signal corresponding to the second display panel based on the first screen setting signal further includes the process of capturing a first transmittance section, a second transmittance section and a third transmittance section corresponding to the red spectrum, the green spectrum and the blue spectrum, respectively, from the transmittance frequency spectrum data by the screen 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 screen setting signal based on the first transmittance section, the second transmittance section and the third transmittance section.

[0021] As another example of the above embodiment, the process of generating a first screen setting signal corresponding to the first display panel based on the environmental brightness by the screen management module and generating a second screen setting signal corresponding to the second display panel based on the first screen setting signal further includes a process of acquiring screen content data and dividing it into static screen data and dynamic screen data by the screen management module, a process of aligning the static screen data with the first screen setting signal by the screen management module and displaying the first screen projected by the first display panel as a static screen, and a process of aligning the dynamic screen data with the second screen setting signal by the screen management module and displaying the second screen projected by the second display panel as a dynamic screen different from the static screen.

[0022] As another example of the above embodiment, the process of generating a first screen setting signal corresponding to a first display panel based on environmental brightness by a screen management module and generating a second screen setting signal corresponding to a second display panel based on the first screen setting signal further includes a process of acquiring screen content data by the screen management module and dividing it into first depth of field screen data and second depth of field screen data, a process of aligning the first depth of field screen data with the first screen setting signal by the screen management module, and displaying the first screen projected by the first display panel on the first depth of field screen, and a process of aligning the second depth of field screen data with the second screen setting signal by the screen management module, and displaying the second screen projected by the second display panel on a second depth of field screen different from the first depth of field screen. [Brief description of the drawings]

[0023] [Figure 1] 1 is a schematic diagram showing a composite display device according to a first embodiment of the present disclosure. [Diagram 2] FIG. 1 is a cross-sectional view of a composite display in accordance with the subject matter of the present disclosure. [Diagram 3] FIG. 1 is a top view of a composite display in accordance with the subject matter of the present disclosure. [Figure 4] 10 is a flowchart showing a control method for a composite display device according to a second embodiment of the present disclosure. [Diagram 5] 5 is a flowchart showing a process of generating a first screen setting signal and a second screen setting signal in a control method of the composite display device of FIG. 4. [Figure 6] FIG. 4 is a diagram showing a transmission frequency spectrum of a first display panel according to the present disclosure. [Figure 7] FIG. 13 is a diagram showing the spectrum versus emission intensity of a second display panel according to the present disclosure. [Figure 8A] 2 is a schematic diagram showing a static screen of a first display panel according to the present disclosure. FIG. [Figure 8B] 4 is a schematic diagram showing a dynamic screen of a second display panel according to the present disclosure. FIG. [Figure 8C]1 is a schematic diagram showing a composite screen of a composite display according to the present disclosure; [Figure 9A] 4 is a schematic diagram showing a first depth of field screen of a first display panel according to the present disclosure. FIG. [Figure 9B] FIG. 4 is a schematic diagram illustrating a second depth of field screen of a second display panel according to the present disclosure. [Figure 9C] 1 is a schematic diagram showing a composite screen of a composite display according to the present disclosure; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, several embodiments of the present disclosure will be described with reference to the drawings. For clarity, many practical details are described in the following description. However, it should be understood that these practical details are not intended to limit the contents of 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 well-known and commonly used structures and elements are simply and diagrammatically shown in the drawings, and overlapping elements may be represented by the same numbers.

[0025] In addition, in this specification, an element (or a unit or a module, etc.) being "connected / coupled" to another element may refer to the element being directly connected / coupled to the other element, or may refer to the element being indirectly connected / coupled to the other element, that is, the other element is interposed between the element and the other element. When it is specified that an element is "directly connected / coupled" to another element, it indicates that the other element is not interposed between the element and the other element. The terms first, second, and third, etc. are merely for describing different elements and do not limit the elements themselves, so the first element can be read as the second element. In addition, the combinations of elements / units / circuits in this specification are not ordinary or known combinations generally known in this field, and whether the combination relationship can be easily achieved by a person skilled in the art cannot be determined depending on whether the elements / units / circuits themselves are known or not.

[0026] Please refer to Figures 1, 2 and 3 together. Figure 1 shows a schematic diagram of a composite display device according to a first embodiment of the present disclosure, Figure 2 shows a cross-sectional view of the composite display according to the present disclosure, and Figure 3 shows a top view of the composite display of Figure 2. It is necessary to explain that the composite display device 110 in Figure 1 is shown in an exploded view in order to easily explain the structural arrangement of each element of the composite display device 100. As shown in Figure 1, the composite display device 100 includes a composite display 110, a luminance acquisition module 120, a screen management module 130, and a panel control module 140.

[0027] The composite display 110 includes a first display panel 111 and a second display panel 112. The first display panel 111 is provided in front of the second display panel 112 along the stacking direction (i.e., Z direction), and the second display panel 112 is provided in alignment with the rear of the first display panel 111. The brightness acquisition module 120 is electrically connected to the composite display 110 and is used to acquire an environmental brightness 1201 around the composite display 110. The screen management module 130 is electrically connected to the brightness acquisition module 120 and acquires the environmental brightness 1201 from the brightness acquisition module 120. The screen management module 130 generates a first screen setting signal 131 corresponding to the first display panel 111 based on the environmental brightness 1201, and generates a second screen setting signal 132 corresponding to the second display panel 112 based on the first screen setting signal 131. The panel control module 140 is electrically connected to the screen management module 130 and the combined display 110, and receives a first screen setting signal 131 and a second screen setting signal 132 from the screen management module 130. The panel control module 140 provides a first control signal 141 to the first display panel 111 based on the first screen setting signal 131, and provides a second control signal 142 to the second display panel 112 based on the second screen setting signal 132. The panel control module 140 controls the first display panel 111 to project the first screen through the first control signal 141, and controls the second display panel 112 to project the second screen through the second control signal 142. Since both the first screen and the second screen are projected toward the Z direction, the first screen and the second screen are overlapped to form a combined screen. Note that both the first display panel 111 and the second display panel 112 may be controlled by the panel control module 140 to display a single image independently. As a result, the composite display device 100 of the present disclosure may drive either the first display panel 111 or the second display panel 112 to display a single screen, or may drive the first display panel 111 and the second display panel 112 to display different screens simultaneously, for example, to display static and dynamic screens in front and back, or three-dimensional effects with different depths of field in front and back, and further overlap the screens to create a composite screen with multiple visual effects.

[0028] As shown in FIG. 2, the composite display 110 may further include an adhesive layer 113. The adhesive layer 113 is provided between the first display panel 111 and the second display panel 112 to fix the first display panel 111 to the second display panel 112. The material of the adhesive layer 113 may be, but is not limited to, an optical clear adhesive (OCA) or other suitable light-transmitting adhesive material. The thickness of the adhesive layer 113 is only between tens of microns to hundreds of microns and can be neglected, so that the first display panel 111 and the second display panel 112 are closely attached to each other, which avoids interface reflection caused by the change in the refractive index of the air medium, and further reduces the transmission loss of light. In another embodiment, the first display panel may be provided with a gap between it and the second display panel, i.e., an air medium is held between them to reduce the effect of heat conduction and cost control between the two panels.

[0029] Specifically, the first display panel 111 may be a transflective display panel, and may be, for example, a cholesteric liquid crystal display panel, i.e., a display panel in a cholesteric liquid crystal display (ChLCD), and the second display panel 112 may be an active light-emitting display panel, and may be, for example, a submillimeter light-emitting diode (mini LED) display panel, a micro LED display panel, an organic light-emitting diode (OLED) or a perovskite light-emitting diode (PeLED) display panel, but the contents of the present disclosure are not limited thereto.

[0030] As shown in Figures 1 and 3, the first display panel 111 has a first visible region R1 for displaying a first screen, and the second display panel 112 has a second visible region R2 for displaying a second screen. The first visible region R1 at least partially overlaps with the second visible region R2 to form an overlapping region R3, and the area of ​​the overlapping region R3 may occupy 80% or more of the area of ​​the first display panel 111 (i.e., the total area of ​​the panel). In this embodiment, the first visible region R1 and the second visible region R2 may be effective pixel regions of the two panels, respectively, and the first visible region R1 completely overlaps with the second visible region R2, thereby maximizing the overlapping range between the first screen and the second screen.

[0031] Specifically, the second display panel 112 may have a second visible region R2 as an effective pixel region, and a non-display region (no symbol) surrounding the second visible region R2. The second visible region R2 may include a plurality of pixels arranged in a plurality of columns and a plurality of rows along the X direction and the Y direction, respectively, and the X direction, the Y direction, and the Z direction are perpendicular to each other. Each pixel may include a light-emitting element (e.g., a mini LED, a micro LED, an OLED, or a PeLED) and an active element (e.g., a thin-film transistor (TFT)). Depending on the demands of different products, 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. When the plurality of light-emitting elements display a pixel, 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 region may be a region between the second visible region R2 and the frame of the second display panel 112. The non-display region may be provided with electronic components (e.g., a driving circuit, a chip, a conductive line, etc.) for supporting the second visible region R2, but the contents of the present disclosure are not limited thereto.

[0032] In some embodiments, the composite display device 100 may further include a cloud server 150. The luminance acquisition module 120 may include a sensing sub-module 121 and a remote sub-module 122. The sensing sub-module 121 may be, but is not limited to, a luminance sensor. The sensing sub-module 121 is electrically connected to the composite display 110 and can be used to sense the surroundings of the composite display 110 to generate the ambient luminance 1201. The remote sub-module 122 may be, but is not limited to, a wireless communication device. The remote sub-module 122 is signally connected to a cloud server 150 (e.g., a weather forecast service) via the Internet and can be used to acquire the ambient luminance 1201 from the cloud server 150 based on the location information of the composite display 110. In other embodiments, in order to reduce system costs, the luminance acquisition module can acquire the ambient luminance by simply disposing either the sensing sub-module or the remote sub-module.

[0033] In some embodiments, the screen management module 130 may be, but is not limited to, a timing controller (TCON), and the panel control module 140 may be, but is not limited to, a driver integrated circuit (IC). The screen management module 130 may include a processor and a memory. The memory stores a reference luminance 1301 and an artificial intelligence (AI) algorithm 1302. The ambient luminance 1201 and the reference luminance 1301 may be luminance values, but in other embodiments, the ambient luminance and the reference luminance may be illuminance values, and the illuminance value may be, but is not limited to, 2000 Lux. The artificial intelligence algorithm 1302 may be, but is not limited to, a deep learning algorithm or a machine learning algorithm. The processor is electrically connected to the memory, and performs two screen management functions based on the reference luminance 1301 and the artificial intelligence algorithm 1302, one of which is to correct the screen luminance, and the other is to classify the screen content.

[0034] For the correction of the screen brightness, the screen management module 130 generates the first screen setting signal 131 according to the environment brightness 1201, and sets the transmittance of the first display panel 111 (i.e. adjusts the grayscale value of the first screen) through the first screen setting signal 131, and the first screen setting signal 131 may include transmittance frequency spectrum data. After receiving the first screen setting signal 131 provided by the screen management module 130, the panel control module 140 can use the first control signal 141 to change the transmittance of the first display panel 111. It is necessary to explain that, due to various considerations of materials, manufacturing and structural arrangement, the first display panel 111 has a reduced transmittance in a part of the visible light frequency band, so the transmittance of the first display panel 111 for different color spectrums is different. Therefore, the screen management module 130 can capture the first transmittance section, the second transmittance section and the third transmittance section, which respectively correspond to the red spectrum, the green spectrum and the blue spectrum, from the transmission frequency spectrum data of the first screen setting signal 131, and adjust the first intensity parameter, the second intensity parameter and the third intensity parameter, which correspond to the red spectrum, the green spectrum and the blue spectrum in the second screen setting signal 132 according to the first transmittance section, the second transmittance section and the third transmittance section. After receiving the second screen setting signal 132 provided by the screen management module 130, the panel control module 140 transmits the second control signal 142 to the second display panel 112 according to the second screen setting signal 132 to adjust the light emission intensities of the red light emitting elements, the green light emitting elements and the blue light emitting elements, so that the composite screen of the composite display 110 can achieve the uniformity of the screen color.

[0035] In some embodiments, the screen management module 130 can compare the environmental luminance 1201 with the reference luminance 1301. When the environmental luminance 1201 is greater than the reference luminance 1301 (i.e., the environmental light is strong), the screen management module 130 sets the first display panel 111 located in front to a reflective mode (Planar Mode) using the first screen setting signal 131, and closes the second display panel 112 using the second screen setting signal 132. In the reflective mode, the cholesteric liquid crystal is in a planar alignment state (Planar State), and the first display panel 111 reflects the environmental light to project the first screen. Conversely, when the environmental luminance 1201 is less than the reference luminance 1301 (i.e., the environmental light is weak), the screen management module 130 sets the first display panel 111 to a transmissive mode (Focal Conic Mode) using the first screen setting signal 131, and opens the second display panel 112 using the second screen setting signal 132. In the transmission mode, the cholesteric liquid crystal is in a focal conic state, so that the second screen projected by the second display panel 112 located behind can be transmitted through the first display panel 111. As can be seen from the above, when the ambient light changes, the screen management module 130 can timely provide the first screen setting signal 131 and the second screen setting signal 132 to the panel control module 140, and the panel control module 140 can provide the first control signal 141 and the second control signal 142 to the first display panel 111 and the second display panel 112 respectively according to the first screen setting signal 131 and the second screen setting signal 132, and further control the composite display 110 to switch to different display modes, which not only provides high screen quality but also achieves the effect of saving energy.

[0036] Regarding the classification of screen contents, in some embodiments, the screen management module 130 can obtain the screen content data 1101 from an external controller (not shown), and use the artificial intelligence algorithm 1302 to divide the screen content data 1101 into static screen data and dynamic screen data. Furthermore, 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 can match the static screen data to the first screen setting signal 131, so that the first screen projected by the first display panel 111 can be displayed as a static screen. The screen management module 130 can match the dynamic screen data to the second screen setting signal 132, so that the second screen projected by the second display panel 112 can be displayed as a dynamic screen different from the static screen.

[0037] In some embodiments, the screen management module 130 may use an artificial intelligence algorithm 1302 to divide the screen content data 1101 into first depth of field screen data and second depth of field screen data according to the magnitude of different depth of field (DOF) in the screen content data 1101. Then, the screen management module 130 may match the first depth of field screen data to a first screen setting signal 131, and display the first screen projected by the first display panel 111 on the first depth of field screen. The screen management module 130 may match the second depth of field screen data to a second screen setting signal 132, and display the second screen projected by the second display panel 112 on a second depth of field screen different from the first depth of field screen. Hereinafter, a method for controlling the composite display 110 will be described in detail with reference to the accompanying drawings.

[0038] Please refer to Figures 1, 4 and 5 together. Figure 4 shows a flowchart of a control method for a composite display device according to a second embodiment of the present disclosure, and Figure 5 shows a flowchart of a step of generating a first screen setting signal and a second screen setting signal in the control method for a composite display device of Figure 4. As shown in Figures 1 and 4, the control method 200 for a composite display device may be automatically executed by the composite display device 100, and may include steps S01, S02 and S03.

[0039] In step S01, the luminance acquisition module 120 acquires the environmental luminance 1201 around the composite display 110.

[0040] In step S02, the screen management module 130 generates a first screen setting signal 131 corresponding to the first display panel 111 based on the environmental luminance 1201, and generates a second screen setting signal 132 corresponding to the second display panel 112 based on the first screen setting signal 131.

[0041] In step S03, the panel control module 140 supplies a first control signal 141 to the first display panel 111 based on the first screen setting signal 131, and controls the first display panel 111 to project the first screen via the first control signal 141, and supplies a second control signal 142 to the second display panel 112 based on the second screen setting signal 132, and controls the second display panel 112 to project the second screen via the second control signal 142. Thus, the control method 200 for the composite display device of the present disclosure may drive one of the first display panel 111 and the second display panel 112 to display a screen alone, or may drive the first display panel 111 and the second display panel simultaneously to display the first screen and the second screen, respectively, and a composite screen having a plurality of visual effects may be created by overlapping the first screen with the second screen.

[0042] As shown in FIG. 5, step S02 may further include steps S021, S022, and S023. In step S021, the screen management module 130 determines whether the environmental luminance 1201 is greater than the reference luminance 1301 to generate a luminance determination result. If the luminance determination result is "YES", step S022 is executed. In step S022, the panel control module 140 controls the first display panel 111 to be operated in a reflective mode based on the first screen setting signal 131, and controls the second display panel 112 to be closed based on the second screen setting signal 132. On the contrary, if the luminance determination result is "NO", step S023 is executed. In step S023, the panel control module 140 controls the first display panel 111 to be operated in a transmissive mode based on the first screen setting signal 131, and controls the second display panel 112 to be opened based on the second screen setting signal 132. The first display panel 111 has a bi-stable mode (planar alignment mode and focal conic alignment mode), and in the reflective mode, no other backlight source is required to increase the brightness and display the screen, and power is consumed only to refresh the screen (switch the cholesteric liquid crystal state), which can significantly reduce the power consumption of the entire composite display 110.

[0043] Please continue to refer to FIG. 1, FIG. 6 and FIG. 7. FIG. 6 shows a diagram of the transmission frequency spectrum of the first display panel according to the present disclosure, and FIG. 7 shows a diagram of the spectrum-luminous intensity of the second display panel according to the present disclosure. As shown in FIG. 1, FIG. 6 and FIG. 7, step S02 may further include the steps of: capturing a first transmittance section, a second transmittance section and a third transmittance section from the transmission frequency spectrum data 1311 of the first screen setting signal 131, which respectively correspond to the red spectrum RS, the green spectrum GS and the blue spectrum BS, by the screen management module 130; and adjusting a first intensity parameter P1, a second intensity parameter P2 and a third intensity parameter P3 corresponding to the red spectrum RS, the green spectrum GS and the blue spectrum BS in the second screen setting signal 132 according to the first transmittance section, the second transmittance section and the third transmittance section.

[0044] In detail, when the second display panel 112 projects the second screen toward the first display panel 111, the transmittance of the first display panel 111 is not 100%. For example, in some frequency bands of visible light, such as the green spectrum GS (corresponding to a wavelength range of 500 nm to 580 nm) and the blue spectrum BS (corresponding to a wavelength range of 400 nm to 500 nm), a situation occurs in which the transmittance is low. At this time, the screen management module 130 executes a screen luminance correction process to correct the luminance of the second screen of the second display panel 112. In the screen correction process, the screen management module 130 adjusts the emission intensity of the second display panel 112 for different color spectrums according to the ratio based on the transmittance change (i.e., the first transmittance section, the second transmittance section, and the third transmittance section) of the first display panel 111 for different color spectrums. For example, since the transmittance of the first display panel 111 for the red spectrum RS (corresponding to a wavelength range of 580 nm to 680 nm) is three times higher than the transmittance of the green spectrum GS and the blue spectrum BS (as shown in FIG. 6), the screen management module 130 reduces the numerical value of the first intensity parameter P1 corresponding to the red spectrum RS in the second screen setting signal 132, so that the panel control module 140 transmits the second control signal 142 to the second display panel 112 based on the second screen setting signal 132 to adjust and reduce the emission intensity of the red light-emitting element to 1 / 3 of the original value, thereby maintaining the color uniformity of the screen.

[0045] Please continue to refer to Figures 1, 8A, 8B and 8C, where Figure 8A shows a schematic diagram of a static screen of a first display panel according to the present disclosure, Figure 8B shows a schematic diagram of a dynamic screen of a second display panel according to the present disclosure, and Figure 8C shows a schematic diagram of a composite screen of a composite display according to the present disclosure. As shown in Figures 1, 8A, 8B and 8C, step S02 further includes the steps of: obtaining screen content data 1101 by the screen management module 130, and dividing the screen content data 1101 into static screen data and dynamic screen data; conforming the static screen data to the first screen setting signal 131 by the screen management module 130, so that the first screen projected by the first display panel 111 is displayed on the static screen M1; conforming the dynamic screen data to the second screen setting signal 132 by the screen management module 130, so that the second screen projected by the second display panel 112 is displayed on the dynamic screen M2, where the dynamic screen M2 is different from the static screen M1 and overlaps with the static screen M1 to form a composite screen MC1. In detail, in order to control the energy consumption of the entire composite display 110, the screen management module 130 can execute a screen classification process to distinguish the screen content to be projected (i.e., the screen content data 1101) into the static screen M1 and the dynamic screen M2 according to the difference between the static content and the dynamic content in the previous and next frames. The static screen M1 indicates that the screen does not need to be updated within a certain period of time, and is displayed by the first display panel 111 located at the front. The first display panel 111 maintains the screen without consuming power due to the characteristics of the bi-stable mode. The dynamic screen M2 indicates that the content is different for each screen update, and the content that needs to be changed is limited to a minimum range, and is displayed by the second display panel 112 located at the rear. This reduces the range of the light-emitting source, but also reduces energy consumption and even heat energy, which indirectly extends the service life of the composite display 110 and reduces maintenance and management costs.

[0046] Please continue to refer to Figures 1, 9A, 9B and 9C, where Figure 9A shows a schematic diagram of a first depth of field screen of a first display panel in accordance with the present disclosure, Figure 9B shows a schematic diagram of a second depth of field screen of a second display panel in accordance with the present disclosure, and Figure 9C shows a schematic diagram of a composite screen of a composite display in accordance with the present disclosure. 1, 9A, 9B and 9C, the step S02 may further include the steps of: obtaining screen content data 1101 by the screen management module 130, and dividing the screen content data 1101 into first depth of field screen data and second depth of field screen data; conforming the first depth of field screen data to the first screen setting signal 131 by the screen management module 130, and displaying the first screen projected by the first display panel 111 on the first depth of field screen M3; and conforming the second depth of field screen data to the second screen setting signal 132 by the screen management module 130, and displaying the second screen projected by the second display panel 112 on the second depth of field screen M4. The second depth of field screen M4 is different from the first depth of field screen M3, and overlaps with the first depth of field screen M3 to form a composite screen MC2. In detail, in order to allow the composite display 110 to display three-dimensional effects with different depths of field, the screen management module 130 can distinguish the screen contents to be projected (i.e., the screen contents data 1101) into a first depth of field screen M3 and a second depth of field screen M4. The first depth of field screen M3 can be a main part of the screen, and the second depth of field screen M4 can be a supporting part of the screen. The purpose of the classification of the depth of field is to achieve the effect of highlighting the main character and attracting attention. In another embodiment, the first display panel can project the second depth of field screen, and the second display panel can project the first depth of field screen. Which of the first display panel and the second display panel projects the first depth of field screen and which of the second display panel projects the second depth of field screen is determined according to the brightness of the external environment and the attributes of the screen contents.As a result, the control method 200 of the composite display device of the present disclosure achieves multiple functions of environment detection, screen management and display control through the brightness acquisition module 120, the screen management module 130 and the panel control module 140, respectively, so that the composite display 110 can display multiple display effects and improve the readability of the screen.

[0047] As described above, the composite display device and the control method thereof provided by the present disclosure have the following advantages. First, the characteristics of the first and second display panels are utilized to achieve the effects of optimizing the screen and saving energy. Second, the uniformity of the screen color is maintained, and the composite display can simultaneously generate different images on different displays, so the present disclosure can control the images to generate different effects, such as combining still images and moving images, or creating three-dimensional effects with different depths of field. Third, the front first display panel and the rear second display panel are selected according to screen management to project the screen, which can be projected either independently or simultaneously, so that the composite display has multiple display modes.

[0048] The contents of the present disclosure are disclosed in the above embodiments, but the above embodiments are not intended to limit the contents of the present disclosure, and anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the contents of the present disclosure. Therefore, the scope of protection of the contents of the present disclosure should be based on that defined by the scope of the patent application attached later. [Explanation of symbols]

[0049] 100: Composite display device 110: Composite display 1101: Screen content data 111: First display panel 112: Second display panel 113: Adhesive layer 120: Luminance acquisition module 1201:Ambient brightness 121: Detection submodule 122: Remote submodule 130: Screen management module 1301: Reference luminance 1302: Artificial Intelligence Algorithms 131: 1st screen setting signal 1311: Transmission frequency spectrum data 132: Second screen setting signal 140: Panel control module 141: First control signal 142: Second control signal 150: Cloud server 200: Control method for a composite display device M1: Static screen M2: Dynamic Screen M3: 1st depth of field screen M4: 2nd depth of field screen MC1, MC2: Composite screen P1: First strength parameter P2: Second strength parameter P3: Third strength parameter R1: 1st visible region R2: 2nd visible region R3: Overlap area S01, S02, S021, S022, S023, S03: Process BS: Blue spectrum GS: Green spectrum RS: Red spectrum X, Y, Z: direction

Claims

1. a composite display including a first display panel and a second display panel aligned with the first display panel; a brightness acquisition module connected to the composite display and adapted to acquire an environmental brightness around the composite display; a screen management module connected to the luminance acquisition module, the screen management module generating a first screen setting signal corresponding to the first display panel based on the environmental luminance, and generating a second screen setting signal corresponding to the second display panel based on the first screen setting signal; a panel control module connected to the screen management module and the combined display, the panel control module controlling the first display panel to project a first screen based on the first screen setting signal, and controlling the second display panel to project a second screen based on the second screen setting signal; Equipped with A composite display device in which the first screen and the second screen overlap to form a composite screen.

2. The composite display device of claim 1 , wherein the luminance acquisition module includes a sensing sub-module for sensing an environment around the composite display to generate the ambient luminance.

3. The composite display device of claim 1 , wherein the luminance acquisition module includes a remote sub-module, signally connected to a cloud server, for acquiring the environmental luminance from the cloud server based on location information of the composite display.

4. The screen management module determines whether the environmental luminance is greater than a reference luminance to generate a luminance determination result; If the brightness determination result is YES, the panel control module controls the first display panel to be operated in a reflective mode according to the first screen setting signal, and controls the second display panel to be closed according to the second screen setting signal; 2. The composite display device of claim 1, wherein when the brightness judgment result is NO, the panel control module controls the first display panel to be operated in a transparent mode based on the first screen setting signal, and controls the second display panel to be opened based on the second screen setting signal.

5. 2. The composite display device of claim 1, wherein the first screen setting signal includes transmittance frequency spectrum data, and the screen management module captures a first transmittance section, a second transmittance section and a third transmittance section from the transmittance frequency spectrum data, which correspond to a red spectrum, a green spectrum and a blue spectrum, respectively, and adjusts a first intensity parameter, a second intensity parameter and a third intensity parameter in the second screen setting signal, which correspond to the red spectrum, the green spectrum and the blue spectrum, based on the first transmittance section, the second transmittance section and the third transmittance section.

6. The screen management module obtains screen content data and divides it into static screen data and dynamic screen data; The screen management module aligns the static screen data with the first screen setting signal, and displays the first screen projected by the first display panel on a static screen; 2. The composite display device according to claim 1, wherein the screen management module adjusts the dynamic screen data to the second screen setting signal so as to display the second screen projected by the second display panel as a dynamic screen different from the static screen.

7. The screen management module obtains screen content data and divides it into a first depth of field screen data and a second depth of field screen data; The screen management module aligns the first depth of field screen data with the first screen setting signal, and displays the first screen projected by the first display panel on a first depth of field screen; 2. The composite display device of claim 1, wherein the screen management module aligns the second depth of field screen data with the second screen setting signal and displays the second screen projected by the second display panel on a second depth of field screen different from the first depth of field screen.

8. The composite display comprises:

2. The composite display device according to claim 1, further comprising an adhesive layer provided between the first display panel and the second display panel.

9. 2. The composite display device of claim 1, wherein the first display panel has a first visible area for displaying the first screen, the second display panel has a second visible area for displaying the second screen, the first visible area at least partially overlaps with the second visible area to form an overlapping area, and the area of ​​the overlapping area occupies 80% or more of the area of ​​the first display panel.

10. 2. The composite display device according to claim 1, wherein the first display panel is a cholesteric liquid crystal display panel.

11. 2. The composite display device according to claim 1, wherein the second display panel is a submillimeter 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.

12. acquiring an environmental luminance around a composite display including a first display panel and a second display panel by a luminance acquisition module; generating a first screen setting signal corresponding to the first display panel based on the environmental luminance by a screen management module, and generating a second screen setting signal corresponding to the second display panel based on the first screen setting signal; controlling the first display panel to project a first screen based on the first screen setting signal by a panel control module, and controlling the second display panel to project a second screen based on the second screen setting signal; Equipped with A method for controlling a composite display device in which the first screen and the second screen overlap to form a composite screen.

13. The method for controlling a composite display device according to claim 12 , wherein the luminance acquisition module includes a detection sub-module for detecting an environment around the composite display and generating the ambient luminance.

14. The control method for a composite display device as described in claim 12, wherein the brightness acquisition module includes a remote sub-module signal-connected to a cloud server and for acquiring the environmental brightness from the cloud server based on position information of the composite display.

15. generating, by the screen management module, the first screen setting signal corresponding to the first display panel based on the environmental luminance, and generating, by the screen management module, the second screen setting signal corresponding to the second display panel based on the first screen setting signal, determining whether the environment luminance is greater than a reference luminance by the screen management module to generate a luminance determination result; If the brightness determination result is YES, the panel control module controls the first display panel to be operated in a reflective mode according to the first screen setting signal, and controls the second display panel to be closed according to the second screen setting signal; 13. The method for controlling a composite display device according to claim 12, wherein, when the brightness judgment result is NO, the panel control module controls the first display panel to be operated in a transparent mode based on the first screen setting signal, and controls the second display panel to be opened based on the second screen setting signal.

16. The first screen setting signal includes transmission frequency spectrum data, and the step of generating the first screen setting signal corresponding to the first display panel based on the environmental luminance by the screen management module, and generating the second screen setting signal corresponding to the second display panel based on the first screen setting signal, comprises:

13. The method for controlling a composite display device according to claim 12, further comprising the steps of: capturing a first transmittance section, a second transmittance section and a third transmittance section from the transmission frequency spectrum data, the first transmittance section, the second transmittance section and a third transmittance section corresponding to the red spectrum, the green spectrum and the blue spectrum, respectively, by the screen 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 screen setting signal according to the first transmittance section, the second transmittance section and the third transmittance section.

17. generating, by the screen management module, the first screen setting signal corresponding to the first display panel based on the environmental luminance, and generating, by the screen management module, the second screen setting signal corresponding to the second display panel based on the first screen setting signal, obtaining screen content data by the screen management module and dividing the data into static screen data and dynamic screen data; adjusting the static screen data to the first screen setting signal by the screen management module, so that the first screen projected by the first display panel is displayed on a static screen; adjusting the dynamic screen data to the second screen setting signal by the screen management module, so that the second screen projected by the second display panel is displayed as a dynamic screen different from the static screen; The method for controlling a composite display device according to claim 12, comprising:

18. generating, by the screen management module, the first screen setting signal corresponding to the first display panel based on the environmental luminance, and generating, by the screen management module, the second screen setting signal corresponding to the second display panel based on the first screen setting signal, obtaining screen content data by the screen management module and dividing the screen content data into first depth of field screen data and second depth of field screen data; adjusting the first depth of field screen data to the first screen setting signal by the screen management module, so as to display the first screen projected by the first display panel on the first depth of field screen; a step of matching the second depth of field screen data with the second screen setting signal by the screen management module, and displaying the second screen projected by the second display panel on a second depth of field screen different from the first depth of field screen; The method for controlling a composite display device according to claim 12, comprising:

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