TW202326698A - Multi-screen display device and operation method thereof - Google Patents

Abstract

A multi-screen display device and an operation method thereof are provided. The multi-screen display device includes a first screen, a second screen, a displacement sensor, and a processing circuit. The second screen is slid on the first screen to change a display range of the multi-screen display device. The displacement sensor is used to detect a relative position of the second screen to the first screen, and output at least one sensing signal related to the relative position. The processing circuit is coupled to the first screen, the second screen and the displacement sensor. The processing circuit adjusts a display resolution of the second screen according to the at least one sensing signal.

Description

Multi-screen display device and operating method thereof

The present invention relates to a display device, and in particular to a method for operating a multi-screen display device.

The multi-screen display device can expand the display range by splicing multiple screens. In some usage scenarios, the movement of one or more of the screens can be used to change the degree of expansion/contraction of multiple screens, that is, to change the relative positions of multiple screens, and then change the multi-screen display device according to the mutual shading of multiple screens. Display range. At this time, if the display settings of multiple screens, such as the display resolution, cannot be correspondingly adjusted according to the display range, the user experience will be affected.

In view of this, the present invention proposes a multi-screen display device and its operating method, which can adjust the display resolution according to the display range of the multi-screen display device.

In an embodiment of the present invention, the multi-screen display device includes a first screen, a second screen, a displacement sensor and a processing circuit. The second screen is slid on the first screen to change the display range of the multi-screen display device. The displacement sensor is used for detecting the relative position of the second screen to the first screen, and outputting at least one sensing signal related to the relative position. The processing circuit is coupled to the first screen, the second screen and the displacement sensor. Wherein the processing circuit adjusts the display resolution of the second screen according to at least one sensing signal.

In an embodiment of the present invention, the operation method of the multi-screen display device includes: providing a first screen and a second screen, wherein the second screen is slid on the first screen to change the display range of the multi-screen display device; The displacement sensor detects the relative position of the second screen to the first screen, and outputs at least one sensing signal related to the relative position; and adjusts the display resolution of the second screen according to the at least one sensing signal through the processing circuit.

In an embodiment of the present invention, the multi-screen display device includes a first screen, a second screen, a displacement sensor and a processing circuit. The second screen is slid on the first screen to change the display range of the multi-screen display device. The displacement sensor is used for detecting the relative position of the second screen to the first screen, and outputting at least one sensing signal related to the relative position. The processing circuit is coupled to the first screen, the second screen and the displacement sensor. The processing circuit receives the target resolution, controls the movement of the first screen or the second screen according to the target resolution and at least one sensing signal, and adjusts the display resolution of the second screen according to the target resolution.

In an embodiment of the present invention, the operation method of the multi-screen display device includes: providing a first screen and a second screen, wherein the second screen is slid on the first screen to change the display range of the multi-screen display device; The displacement sensor detects the relative position of the second screen to the first screen, and outputs at least one sensing signal related to the relative position; receives the target resolution through the processing circuit; The test signal controls the movement of the first screen or the second screen; and adjusts the display resolution of the second screen according to the target resolution through the processing circuit.

Based on the above, the multi-screen display device and its operating method described in the embodiments of the present invention can detect the relative position of the second screen to the first screen through the displacement sensor. In some embodiments, the processing circuit can adjust the display resolution of the second screen according to the sensing signal output by the displacement sensor. In other embodiments, the processing circuit can control the movement of the first screen or the second screen according to the target resolution, and adjust the display resolution of the second screen accordingly. In this way, the display range and display resolution of the multi-screen display device can be adjusted accordingly, thereby optimizing user experience.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

The term "coupled (or connected)" used throughout the specification of this case (including the scope of claims) may refer to any direct or indirect means of connection. For example, if it is described in the text that a first device is coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be connected to the second device through other devices or certain A connection means indirectly connected to the second device. The terms "first" and "second" mentioned in the entire description of this case (including the scope of the patent application) are used to name elements (elements), or to distinguish different embodiments or ranges, and are not used to limit the number of elements The upper or lower limit of , nor is it used to limit the order of the elements. In addition, wherever possible, elements/components/steps using the same reference numerals in the drawings and embodiments represent the same or similar parts. Elements/components/steps using the same symbols or using the same terms in different embodiments can refer to related descriptions.

FIG. 1 is a schematic circuit block diagram of a multi-screen display device 100 according to an embodiment of the invention. In the embodiment shown in FIG. 1 , the multi-screen display device 100 includes a first screen 110 , a second screen 120 , a displacement sensor 130 and a processing circuit 140 . Although FIG. 1 takes the first screen 110 and the second screen 120 as an illustration example, the number and configuration of the screens of the multi-screen display device 100 can be determined according to the actual design/application. According to design requirements, the size, shape and display mode of the first screen 110 and the second screen 120 may be the same or different, which is not limited in this embodiment. For example, the first screen 110 and/or the second screen 120 may include a liquid crystal display (Liquid Crystal Display, LCD), a field emission display (Field Emission Display, FED), a transparent organic light-emitting diode (Organic Light-Emitting Diode, OLED) display, active-matrix organic light-emitting diode (Active-Matrix Organic Light-Emitting Diode, AMOLED) display, flexible display (Flexible Display), transparent light-emitting diode display (Transparent Light Emitted Diode Display) or others A display unit that provides a display function.

FIG. 2 is a schematic flowchart of an operating method of a multi-screen display device according to an embodiment of the present invention. For the multi-screen display device 100 shown in FIG. 1 , reference may be made to the related description of FIG. 2 . Please refer to Figure 1 and Figure 2 at the same time. In step S210, the multi-screen display device 100 may provide the first screen 110 and the second screen 120 to display different images respectively or jointly display a single image. In this embodiment, the second screen 120 can be slid on the first screen 110 to change the display range of the multi-screen display device 100 .

FIG. 3 is a schematic top view illustrating the first screen 110 and the second screen 120 shown in FIG. 1 according to an embodiment of the present invention. In the embodiment shown in FIG. 3 , a sliding portion B1 is disposed on the back of the first screen 110 . The second screen 120 is slidably disposed on the sliding part B1. Therefore, the second screen 120 can be moved on the back of the first screen 110 through the sliding part B1 to change the relative position of the first screen 110 and the second screen 120 . In this way, based on the relative positions of the first screen 110 and the second screen 120 , the second screen 120 is divided into a non-display area covered by the first screen 110 and a display area not covered. The display area of the first screen 110 and the display area of the second screen 120 constitute the display area of the multi-screen display device 100 . The change of the relative position of the first screen 110 and the second screen 120 can change the display range of the multi-screen display device 100 . For example, when the first screen 110 overlaps the second screen 120 , that is, the second screen 120 is completely covered by the first screen 110 , the display range of the multi-screen display device 100 is the smallest. When the first screen 110 does not overlap the second screen 120 , that is, the second screen 120 is not completely covered by the first screen 110 , the display range of the multi-screen display device 100 is the largest.

Please refer to Figure 1 and Figure 2. In this embodiment, the displacement sensor 130 can be disposed on the first screen 110 , the second screen 120 or other device components to sense the movement of the first screen 110 or the second screen 120 . In step S220, the displacement sensor 130 can detect the relative position of the second screen 120 to the first screen 110, and output one or more sensing signals SS related to the relative position. According to the actual design/application, the displacement sensor 130 may include an optical sensor, a capacitive sensor, an image capture unit and (or) other position sensors, which will be described in more detail in subsequent embodiments. illustrate.

In this embodiment, the processing circuit 140 is coupled to the first screen 110 , the second screen 120 and the displacement sensor 130 . In step S230 , the processing circuit 140 can adjust the display resolution of the second screen 120 according to the sensing signal SS of the displacement sensor 130 . For example, assume that the full resolution of the second screen 120 is 1440*2160. When the sensing signal SS indicates that the second screen 120 is not covered by the first screen 110 at all, the display resolution of the second screen 120 can be set to 1440*2160. When the sensing signal SS indicates that half of the second screen 120 is covered by the first screen 110 , the display resolution of the second screen 120 can be set to 720*2160.

FIG. 4 is a circuit block diagram illustrating the processing circuit 140 shown in FIG. 1 according to an embodiment of the present invention. According to design requirements, in the embodiment shown in FIG. 4 , the processing circuit 140 may include a processor 141 , a display control unit 142 and a display control unit 143 . The processor 141 can be coupled to the displacement sensor 130 to receive the sensing signal SS. The display control unit 142 can be coupled to the processor 141 and the first screen 110 to drive the first screen 110 according to the control of the processor 141 . The display control unit 143 can be coupled to the processor 141 and the second screen 120 to drive the second screen 120 according to the control of the processor 141 . The processor 141 can know the current relative position of the first screen 110 and the second screen 120 according to the sensing signal SS, so as to know the current effective display area of the second screen 120 . Furthermore, the processor 141 can determine the current display specification data of the second screen 120 according to the sensing signal SS, and control the display control unit 143 to adjust the display resolution of the second screen 120 .

For example, multiple different display specification data (candidate display specification data) of the second screen 120 can be pre-configured in the processor 141 . After receiving the sensing signal SS, the processor 141 may select one of multiple candidate display specification data as the current display specification data according to the sensing signal SS. Wherein, any one of the candidate display specification data may include extended display identification data (Extended display identification data, EDID), which is not limited in this embodiment. The processor 141 can provide the current EDID to a host (host, such as a personal computer, not shown). According to the current EDID, the host computer can generate an image frame suitable for displaying in the current display area (display area not covered) of the second screen 120 , and then the image frame is displayed on the second screen 120 .

In some embodiments, the processing circuit 140 may also disable the display elements and/or touch elements in the non-display area on the second screen 120 based on the relative positions of the first screen 110 and the second screen 120, so as to The power consumption of the second screen 120 is saved. For example, the coordinate position of the display start point or the touch start point of the second screen 120 can be changed. In some application scenarios, when there is no display area on the second screen 120 , that is, the second screen 120 is completely covered by the first screen 110 , the second screen 120 can be disabled or turned off.

According to design requirements, the processing circuit 140 and (or) the processor 141 may be a central processing unit (Central Processing Unit, CPU), a microcontroller unit (Microcontroller Unit, MCU), a digital signal processor (Digital Signal Processor, DSP) , Programmable Logic Controller (PLC), Digital Signal Processor (Digital Signal Processor, DSP), Application Specific Integrated Circuits (ASIC), Programmable Logic Device (Programmable Logic Device, PLD) or other similar devices or a combination of these devices. In other embodiments, the processing circuit 140 and (or) the processor 141 can also implement various operating functions in the form of hardware circuits, and its detailed steps and implementation methods can be obtained from the general knowledge in the technical field. Sufficient teachings, suggestions and Implementation instructions.

FIG. 5 is a schematic circuit block diagram of a multi-screen display device 300 according to another embodiment of the present invention. In the embodiment shown in FIG. 5 , the multi-screen display device 300 includes a first screen 310 , a second screen 320 , a displacement sensor 330 and a processing circuit 340 . The first screen 310, the second screen 320, the displacement sensor 330 and the processing circuit 340 shown in FIG. 5 can refer to the first screen 110 shown in FIG. The explanation is analogized, so it will not be repeated. The difference from the embodiment shown in FIG. 1 is that the processing circuit 340 shown in FIG. 5 can receive the target resolution RES to adjust the display resolution of the second screen according to the target resolution RES. According to actual design, in some embodiments, the target resolution RES may be determined by a host (host, such as a personal computer, not shown).

In addition, in the embodiment shown in FIG. 5 , the multi-screen display device 300 may further include a motor servo mechanism 350 . The motor servo mechanism 350 can move the first screen 310 and/or the second screen 320 according to the control of the processing circuit 340 to adjust the relative positions of the first screen 310 and the second screen 320 . In the implementation scenario that "the target resolution RES is determined by the host", the host (not shown) can trigger the movement of the first screen 310 and/or the second screen 320 by determining the target resolution RES.

FIG. 6 is a flowchart of an operating method of a multi-screen display device according to an embodiment of the invention. For the multi-screen display device 300 shown in FIG. 5 , reference may be made to the related description of FIG. 6 . Step S410 and step S420 shown in FIG. 6 can be analogized with reference to related descriptions of step S210 and step S220 shown in FIG. 2 , so details are not repeated here.

Please refer to Figure 5 and Figure 6 at the same time. In step S430, the processing circuit 340 may receive the target resolution RES. In step S440, the processing circuit 340 can control the movement of the first screen 310 or the second screen 320 according to the target resolution RES and the sensing signal SS. For example, according to design requirements, the processing circuit 340 may include a processor and a display control unit (not shown, it can be analogized with reference to the related description of the processor 141 and the display control unit 143 shown in FIG. 4 ). The processor can receive the target resolution RES and the sensing signal SS. In this embodiment, the processor is further coupled to the motor servo mechanism 350 to control the motor servo mechanism 350 to move the first screen 310 or the second screen 320 according to the target resolution RES and the sensing signal SS.

For example, the processor of the processing circuit 340 (not shown, it can be analogized with reference to the related description of the processor 141 shown in FIG. 4 ) can select one of multiple candidate display specifications according to the target resolution RES as The current display specification data is used to control the motor servo mechanism 350 to move the first screen 310 or the second screen 320 according to the current display specification data and the sensing signal SS, thereby adjusting the display range of the multi-screen display device 300 . The current display specification information may include EDID. The processing circuit 340 can provide the current EDID to the host (such as a personal computer, not shown). According to the current EDID, the host computer can generate an image frame suitable for displaying in the current display area (display area not covered) of the second screen 320 , and then the image frame is displayed on the second screen 320 .

In step S450, the processing circuit 340 can adjust the display resolution of the second screen 320 according to the target resolution RES. For example, the processor 341 can adjust the display resolution of the second screen 320 according to the current display specification data selected by the target resolution RES among multiple candidate display specification data, so that the display in the display range of the multi-screen display device 300 The resolution corresponds to the target resolution RES.

FIG. 7A , FIG. 7B and FIG. 7C are schematic diagrams illustrating different application scenarios of the multi-screen display device 500 according to an embodiment of the present invention. In the embodiment shown in FIG. 7A to FIG. 7C , the multi-screen display device 500 includes a first screen 510 , a second screen 521 , a third screen 522 , a displacement sensor 530 and a processing circuit 540 . The multi-screen display device 500, the first screen 510 and the processing circuit 540 shown in FIG. 7A to FIG. The description can be analogized, or the related description of the multi-screen display device 300 , the first screen 310 and the processing circuit 340 shown in FIG. 5 can be referred to for analogy.

The second screen 521 and/or the third screen 522 shown in FIGS. 7A to 7C) can be deduced by referring to the relevant description of the second screen 120 in the embodiment shown in FIGS. 1 to 4, or referring to the first screen shown in FIG. The relevant description of the second screen 320 is analogized. In the embodiment shown in FIGS. 7A to 7C , the second screen 521 and/or the third screen 522 can move relative to the first screen 510 to change the display range of the multi-screen display device 500 . The sizes and moving modes of the display areas of the first screen 510 , the second screen 521 and the third screen 522 are just an example. In other embodiments, the size or displacement of the display area of the second screen 521 and the third screen 522 may be different, which is not limited in this embodiment.

For example, assume that the full resolution of the first screen 510 is 3840*2160, the full resolution of the second screen 521 is 1440*2160, and the full resolution of the third screen 522 is 1440*2160. In the application scenario shown in FIG. 7A , the second screen 521 and the third screen 522 are not covered by the first screen 510 at all, so the processing circuit 340 can set the display resolution of the second screen 521 and the third screen 522 to 1440* 2160. In the application scenario shown in FIG. 7B , part of the second screen 521 and part of the third screen 522 are covered by the first screen 510 , so the processing circuit 340 can display the second screen 521 and the third screen 522 The resolution is set to 1000*2160. In the application scenario shown in FIG. 7C , the second screen 521 and the third screen 522 are all covered by the first screen 510 , so the processing circuit 340 can turn off the second screen 521 and the third screen 522 .

The displacement sensor 530 (not shown in FIGS. 7A to 7C , refer to FIGS. 8 to 11 for details) can be disposed between the first screen 510 and the second screen 521 and/or between the first screen 510 and the third screen 522 interval to sense the movement of the second screen 521 and the third screen 522 . For example, FIG. 8A and FIG. 8B are schematic diagrams illustrating the configuration of the displacement sensor 530 in the multi-screen display device 500 shown in FIG. 7A to FIG. 7C according to an embodiment of the present invention. For the first screen 510 , the second screen 521 and the third screen 522 shown in FIG. 8A and FIG. 8B , reference may be made to the related descriptions in FIG. 7A to FIG. 7C , so details are not repeated here. FIG. 8A shows a schematic top view of the first screen 510 , the second screen 521 and the third screen 522 in the application scenario shown in FIG. 7B . FIG. 8B shows a schematic top view of the first screen 510 , the second screen 521 and the third screen 522 in the application scenario shown in FIG. 7C .

Please refer to FIGS. 7A to 7C and FIGS. 8A to 8B . In the embodiment shown in FIGS. 8A to 8B , the displacement sensor 530 may include displacement sensors SL1 , SL2 , SL3 , SL4 , SR1 , SR2 , SR3 and SR4 . The displacement sensors SL1 - SL4 may be disposed between the first screen 510 and the second screen 521 , and the displacement sensors SR1 - SR4 may be disposed between the first screen 510 and the third screen 522 . The quantity of the displacement sensors SL1 - SL4 and SR1 - SR4 can be determined according to the actual design/application, which is not limited in this embodiment. In this way, the processing circuit 540 can determine the relative positions of the second screen 521 and the first screen 510 according to the sensing signals output by the displacement sensors SL1 - SL4 .

In the embodiment shown in FIG. 8A and FIG. 8B , any one of the displacement sensors SL1 - SL4 and SR1 - SR4 can be an optical sensor, an ultrasonic sensor, a micro switch or other sensors. For example, the optical sensor may include a reflective optical sensor. The processing circuit 540 can determine the relative position of the second screen 521 and the first screen 510 according to the “light shielding state” sensed by the optical sensors (displacement sensors SL1 - SL4 ). Similarly, the processing circuit 540 can determine the relative position of the third screen 522 and the first screen 510 according to the sensing signals output by the displacement sensors SR1 - SR4 .

For example, the following Table 1 is a comparison table of the candidate display specification data of the second screen 521 and the sensing signals of the displacement sensors SL1 - SL4 . In the embodiment shown in Table 1, the sensing signals output by the displacement sensors SL1-SL4 are high potential H, which means "the second screen 521 is sensed", and low potential L, which means "the second screen 521 is not sensed". ". The processing circuit 540 can select one of the multiple candidate display specification data in Table 1 as the current display specification data of the second screen 521 according to the sensing signals output by the displacement sensors SL1-SL4, and then according to the current display specification data Adjust the display resolution of the second screen 521 . The following Table 2 is a comparison table between the candidate display specification data of the third screen 522 and the sensing signals of the displacement sensors SR1 - SR4 . In the embodiment shown in Table 2, the sensing signals output by the displacement sensors SR1-SR4 are high potential H, which means "the third screen 522 is sensed", and low potential L, which means "the third screen 522 is not sensed". ". The processing circuit 540 can select one of multiple candidate display specification data in Table 2 as the current display specification data of the third screen 522 according to the sensing signals output by the displacement sensors SR1-SR4, and then according to the current display specification data Adjust the display resolution of the third screen 522 . Wherein, the combinations and potential values of the sensing signals in Table 1 and Table 2 are just examples, and are not intended to limit the implementation scope of the present invention. Table 1: Comparison Table of Candidate Display Specification Data and Sensing Signals of the Second Screen 521 Candidate display specification data SL1 SL2 SL3 SL4 display resolution A L L L L display resolution B h L L L display resolution C h h L L display resolution D h h h L screen off h h h h Table 2: Comparison Table of Candidate Display Specification Data and Sensing Signals of the Third Screen 522 Candidate display specification data SR1 SR2 SR3 SR4 display resolution A L L L L display resolution B L L L h display resolution C L L h h display resolution D L h h h screen off h h h h

As another example, FIG. 9 is a schematic diagram illustrating the configuration of the displacement sensor 530 in the multi-screen display device 500 shown in FIGS. 7A to 7C according to another embodiment of the present invention. For the first screen 510 , the second screen 521 and the third screen 522 shown in FIG. 9 , reference may be made to the relevant descriptions of FIGS. 7A to 7C , so details are not repeated here. FIG. 9 shows a schematic top view of the first screen 510 , the second screen 521 and the third screen 522 in the application scenario shown in FIG. 7C . Please refer to FIG. 7A to FIG. 7C and FIG. 9 . In the embodiment shown in FIG. 9, the displacement sensor 530 may include a transmitter SLS1, a transmitter SLS2, a transmitter SLS3, a transmitter SLS4, a receiver SLR1, a receiver SLR2, a receiver SLR3, a receiver SLR4, a transmitter SRS1, transmitter SRS2, transmitter SRS3, transmitter SRS4, receiver SRR1, receiver SRR2, receiver SRR3 and receiver SRR4. The transmitters SLS1-SLS4 and the receivers SLR1-SLR4 can be respectively arranged on both sides of the sliding path of the second screen 521, and the transmitters SRS1-SRS4 and the receivers SRR1-SRR4 can be respectively arranged on the sliding path of the third screen 522. Both sides of the path, as shown in Figure 9.

According to actual design/application, in the embodiment shown in FIG. 9 , the displacement sensor 530 may include, for example, an optical sensor, an ultrasonic sensor, or other sensors. For example, the optical sensor may include a penetrating optical sensor. For example, when the second screen 521 is not between the transmitter SLS4 and the receiver SLR4, the receiver SLR4 can sense the light emitted by the transmitter SLS4. When the second screen 521 is between the transmitter SLS4 and the receiver SLR4, the receiver SLR4 cannot sense the light emitted by the transmitter SLS4. In this way, the processing circuit 540 can judge the relative position of the second screen 521 (or the third screen 522 ) and the first screen 510 according to the light shielding state sensed by the receivers SLR1 - SLR4 (or SRR1 - SRR4 ), and then Adjust the display resolution of the second screen 521 (or the third screen 522 ).

For another example, FIG. 10A , FIG. 10B , FIG. 10C and FIG. 10D are schematic diagrams illustrating the configuration of the displacement sensor 530 in the multi-screen display device 500 shown in FIG. 7A to FIG. 7C according to yet another embodiment of the present invention. The first screen 510 , the second screen 521 , and the third screen 522 shown in FIGS. 10A to 10D can refer to the relevant descriptions of FIGS. 7A to 7C , so details are not repeated here. In the application scenario shown in FIG. 10A , the second screen 521 and the third screen 522 are not covered by the first screen 510 at all. In the application scenario shown in FIG. 10B , a small part of the display areas of the second screen 521 and the third screen 522 are covered by the first screen 510 . In the application scenario shown in FIG. 10C , most of the display areas of the second screen 521 and the third screen 522 are covered by the first screen 510 . In the application scenario shown in FIG. 10D , the entire display areas of the second screen 521 and the third screen 522 are covered by the first screen 510 .

Please refer to FIG. 10A to FIG. 10D . For convenience of description, the lower part of FIG. 10A to FIG. 10D only takes the second screen 521 and the first screen 510 as examples. The third screen 522 can be deduced with reference to the relevant description of the second screen 521 , so details are not repeated here. In the embodiment shown in FIG. 10A to FIG. 10D , the touch sensing layer of the second screen 521 and the touch elements S1 , S2 , S3 and S4 can be used as the displacement sensor 530 . In detail, the touch elements S1 - S4 can be disposed at different positions on the back of the first screen 510 , as shown in FIGS. 10A to 10D . According to the sliding position of the second screen 521, the touch sensing layer (displacement sensor 530) of the second screen 521 can sense one or more of the touch elements S1-S4 to determine whether the second screen 521 and The relative position of the first screen 510 .

For example, according to the actual design/application, the displacement sensor 530 shown in FIGS. 10A to 10D may include, for example, a capacitance and a capacitance sensor, wherein the capacitance may be set on the first screen 510 and the second screen 521 One of them, and the capacitive sensor can be disposed on the other one of the first screen 510 and the second screen 521 . For example, in this embodiment, capacitors (touch elements S1-S4) can be arranged on the back of the first screen 510, and multiple touch elements (such as touch sensing layers) of the second screen 521 can be used as the capacitive sensor. In this way, the processing circuit 540 can determine the relative position of the second screen 521 and the first screen 510 according to the capacitance value sensed by the capacitive sensor (the touch sensing layer of the second screen 521 ).

In some embodiments, the touch elements S1-S4 may have different distances from each of the multiple display boundaries of the first screen 510 (for example, the four boundaries of the first screen 510 shown in FIG. 10A to FIG. 10D ). same to improve the recognition accuracy. In addition, the quantity, size, shape, position or element characteristics of the touch elements S1 - S4 can be determined according to the actual design/application, which is not limited in this embodiment. In some embodiments, the sensing capacitance value obtained by the touch sensing layer of the second screen 521 from sensing the touch elements S1˜S4 may be different from that obtained by sensing the user’s finger by the touch sensing layer of the second screen 521. The obtained sensing capacitance value is used to avoid misjudgment when the user touches the second screen 521 . For example, the size of the touch elements S1 - S4 can be designed to be four times the size of the user's finger.

As another example, FIG. 11 is a schematic diagram illustrating a sensing situation of the displacement sensor 530 in the multi-screen display device 500 shown in FIGS. 7A to 7C according to yet another embodiment of the present invention. The first screen 510 and the second screen 521 shown in FIG. 11 can refer to the relevant descriptions of FIG. 7A to FIG. 7C , so details are not repeated here. Please refer to FIG. 7A to FIG. 7C and FIG. 11 . In the embodiment shown in FIG. 11 , the displacement sensor 530 may include, for example, an image capture unit, and the image capture unit is disposed on the second screen 521 . In this embodiment, one or more different marks TG (such as marks with different numbers, symbols, sizes, aspect ratios or other characteristics) can be set on the back of the first screen 510 . The image capture unit (displacement sensor 530 ) of the second screen 521 can be used to capture the one or more marks TG on the back of the first screen 510 to generate an image frame. In this way, the processing circuit 540 can determine the relative position of the second screen 521 and the first screen 510 according to the marks in the image frame.

For example, the image capture unit (displacement sensor 530 ) of the second screen 521 may capture a single mark TG. The processing circuit 540 can identify a single mark TG in the image frame, and judge the second screen 521 according to the characteristics of the mark TG (such as shape, size, length, width, aspect ratio, grayscale, color or other characteristics). The relative position to the first screen 510 . Or, as another example, the image capture unit (displacement sensor 530 ) of the second screen 521 may capture a plurality of marks TG, for example, the region RG shown in FIG. 11 . The processing circuit 540 can recognize the characteristics (such as shape, size, length, width, aspect ratio, gray scale, color or other characteristics) of one or more marks TG in the image frame, and judge the second screen according to the recognition result 521 relative to the first screen 510 .

In other embodiments, the image capture unit (displacement sensor 530 ) can also be disposed on the first screen 510 , and the one or more marks TG are disposed on the second screen 521 . In addition, the marking TG can be set by using stickers, printing, engraving, existing objects on the first screen 510 or the second screen 521 , or other ways. The quantity and positions of the displacement sensors 530 and the marks are just an example, and are not intended to limit the implementation scope of the present invention.

To sum up, the multi-screen display device and its operation method described in the various embodiments of the present invention can detect the relative position of the second screen (or the third screen) to the first screen through the displacement sensor. In some embodiments, the processing circuit can adjust the display resolution of the second screen (or the third screen) according to the sensing signal output by the displacement sensor. In other embodiments, the processing circuit can control the movement of the first screen or the second screen (or the third screen) according to the target resolution, and adjust the display resolution of the second screen accordingly. In this way, the display range and display resolution of the multi-screen display device can be adjusted accordingly, thereby optimizing user experience.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the scope of the appended patent application.

100, 300, 500: Multi-screen display device 110, 510: first screen 120, 320, 521: Second screen 130, 330, 530, SL1~SL4, SR1~SR4: displacement sensor 140, 340, 540: processing circuit 141: Processor 142, 143: display control unit 350: motor servo mechanism 522: The third screen B1: sliding part RES: target resolution RG: Region S1~S4: Touch elements S210~S230, S410~S450: steps SLR1~SLR4, SRR1~SRR4: Receiver SLS1~SLS4, SRS1~SRS4: Transmitter SS: Sensing signal TG: mark

FIG. 1 is a schematic diagram of a circuit block of a multi-screen display device according to an embodiment of the invention. FIG. 2 is a flowchart of an operating method of a multi-screen display device according to an embodiment of the invention. FIG. 3 is a schematic top view illustrating the first screen and the second screen shown in FIG. 1 according to an embodiment of the present invention. FIG. 4 is a circuit block diagram illustrating the processing circuit shown in FIG. 1 according to an embodiment of the invention. FIG. 5 is a schematic circuit block diagram of a multi-screen display device according to another embodiment of the present invention. FIG. 6 is a flowchart of an operating method of a multi-screen display device according to an embodiment of the invention. FIG. 7A , FIG. 7B and FIG. 7C are schematic diagrams illustrating different usage scenarios of a multi-screen display device according to an embodiment of the present invention. FIG. 8A and FIG. 8B are schematic diagrams illustrating the configuration of displacement sensors in the multi-screen display device shown in FIG. 7A to FIG. 7C according to an embodiment of the present invention. FIG. 9 is a schematic diagram illustrating the configuration of displacement sensors in the multi-screen display device shown in FIGS. 7A to 7C according to another embodiment of the present invention. 10A, 10B, 10C and 10D are schematic diagrams illustrating the configuration of the displacement sensors in the multi-screen display device shown in FIGS. 7A to 7C according to yet another embodiment of the present invention. FIG. 11 is a schematic diagram illustrating the situation of the displacement sensor in the multi-screen display device shown in FIG. 7A to FIG. 7C according to yet another embodiment of the present invention.

100:Multi-screen display device

110: First screen

120:Second screen

130: Displacement sensor

140: Processing circuit

SS: Sensing signal

Claims (16)

A multi-screen display device, comprising: a first screen; a second screen, which is slid on the first screen to change a display range of the multi-screen display device; a displacement sensor for detecting a relative position of the second screen to the first screen, and outputting at least one sensing signal related to the relative position; and A processing circuit is coupled to the first screen, the second screen and the displacement sensor, wherein the processing circuit adjusts a display resolution of the second screen according to the at least one sensing signal. The multi-screen display device as described in claim 1, wherein the processing circuit includes: a display control unit for driving the second screen; and A processor, coupled to the displacement sensor to receive the at least one sensing signal, wherein the processor determines a current display specification data of the second screen according to the at least one sensing signal, so as to control the display control unit to adjust the display resolution of the second screen; wherein the processor selects one of multiple candidate display specification data as the current display specification data according to the at least one sensing signal; Any one of the candidate display specification data includes an extended display capability identification data. The multi-screen display device as described in claim 1, wherein the second screen includes a non-display area based on the relative position, and the processing circuit uses a display element or a touch screen in the non-display area of the second screen Component disabled. The multi-screen display device as claimed in claim 1, wherein the displacement sensor is disposed on the first screen or the second screen to sense the movement of the first screen or the second screen. The multi-screen display device as described in claim 1, wherein the displacement sensor includes an optical sensor, and the processing circuit judges the distance between the second screen and the first screen according to a light shielding state sensed by the optical sensor. The relative position of the screen and the optical sensor include a transmissive optical sensor or a reflective optical sensor. The multi-screen display device as described in claim 1, wherein the displacement sensor includes a capacitance and a capacitance sensor, the capacitance is arranged on one of the first screen and the second screen, and the capacitance sensor The detector is arranged on the other one of the first screen and the second screen, and the processing circuit judges the relative position between the second screen and the first screen according to a capacitance value sensed by the capacitive sensor, The capacitor is arranged on the first screen, and the capacitive sensor includes a plurality of touch elements on the second screen. The multi-screen display device as described in claim 1, wherein the displacement sensor includes an image capture unit, the image capture unit is arranged on one of the first screen and the second screen, and at least one mark Set on the other one of the first screen and the second screen, the image capture unit is used to photograph the at least one mark to generate an image frame, and the processing circuit judges according to the at least one mark in the image frame The relative position of the second screen and the first screen. A method for operating a multi-screen display device, comprising: providing a first screen and a second screen, wherein the second screen is slid on the first screen to change a display range of the multi-screen display device; detecting a relative position of the second screen to the first screen through a displacement sensor, and outputting at least one sensing signal related to the relative position; and A display resolution of the second screen is adjusted through a processing circuit according to the at least one sensing signal. A multi-screen display device, comprising: a first screen; a second screen, which is slid on the first screen to change a display range of the multi-screen display device; a displacement sensor for detecting a relative position of the second screen to the first screen, and outputting at least one sensing signal related to the relative position; and a processing circuit, coupled to the first screen, the second screen and the displacement sensor, wherein the processing circuit receives a target resolution, and controls the first screen according to the target resolution and the at least one sensing signal The screen or the second screen moves, and a display resolution of the second screen is adjusted according to the target resolution. The multi-screen display device as described in claim 9, further comprising: a motor servo mechanism for moving the first screen or the second screen according to the control of the processing circuit; Wherein the processing circuit includes: a display control unit for driving the second screen; and A processor, coupled to the motor servo mechanism and the displacement sensor, wherein the processor selects one of a plurality of candidate display specification data as a current display specification data according to the target resolution, and the processor selects one according to the current display specification data. The display specification data controls the display control unit to adjust the display resolution of the second screen, and the processor controls the motor servo mechanism to move the first screen or the second screen according to the current display specification data and the at least one sensing signal The screen and any one of the candidate display specification data includes an extended display capability identification data. The multi-screen display device as described in claim 9, wherein the second screen includes a non-display area based on the relative position, and the processing circuit uses a display element or a touch screen in the non-display area of the second screen Component disabled. The multi-screen display device as claimed in claim 9, wherein the displacement sensor is disposed on the first screen or the second screen to sense the movement of the first screen or the second screen. The multi-screen display device as described in claim 9, wherein the displacement sensor includes an optical sensor, and the processing circuit judges whether the second screen is connected to the first screen according to a light shielding state sensed by the optical sensor. The relative position of the screen and the optical sensor include a transmissive optical sensor or a reflective optical sensor. The multi-screen display device as described in claim 9, wherein the displacement sensor includes a capacitance and a capacitance sensor, the capacitance is arranged on one of the first screen and the second screen, and the capacitance sensor The detector is arranged on the other one of the first screen and the second screen, and the processing circuit judges the relative position between the second screen and the first screen according to a capacitance value sensed by the capacitive sensor, The capacitor is arranged on the first screen, and the capacitive sensor includes a plurality of touch elements on the second screen. The multi-screen display device as described in claim 9, wherein the displacement sensor includes an image capture unit, the image capture unit is arranged on one of the first screen and the second screen, and at least one mark Set on the other one of the first screen and the second screen, the image capture unit is used to photograph the at least one mark to generate an image frame, and the processing circuit judges according to the at least one mark in the image frame The relative position of the second screen and the first screen. A method for operating a multi-screen display device, comprising: providing a first screen and a second screen, wherein the second screen is slid on the first screen to change a display range of the multi-screen display device; detecting a relative position of the second screen to the first screen through a displacement sensor, and outputting at least one sensing signal related to the relative position; receiving a target resolution through a processing circuit; controlling the movement of the first screen or the second screen according to the target resolution and the at least one sensing signal through the processing circuit; and A display resolution of the second screen is adjusted according to the target resolution through the processing circuit.

Images