Electronic paper screen and electronic paper double-screen system

Abstract

The invention discloses an electronic paper screen and an electronic paper double-screen system, and relates to the technical field of display screens, the electronic paper screen comprises a display area, a single integrated circuit (IC) and a flexible printed circuit (FPC), and the electronic paper screen supports a master-slave driving mode through pin design. Two electronic paper screens in the electronic paper double-screen system are in circuit connection on a peripheral circuit according to a master-slave driving mode, the two electronic paper screens in the electronic paper double-screen system can share one set of matching circuit, and only one set of system-in-package SIP interfaces need to be occupied. The cost of the electronic paper double-screen system can be reduced, and the image updating efficiency of the electronic paper double-screen system can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display screens, and in particular to an electronic paper screen and an electronic paper dual-screen system. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the invention recited in the claims. No admission is made that the description herein is prior art by inclusion in this section.

[0003] An electronic paper screen is a display screen made using electrophoretic display technology. The control circuit on the TFT (Thin Film Transistor) substrate applies a driving voltage to each pixel to achieve the effect of displaying an image. As a reflective display screen, the electronic paper screen can maintain the image for a long time without continuous refreshing after the image is updated, so the power consumption is very low. Due to its low power consumption, wide viewing angle, high contrast, eye protection and many other features, electronic paper screens are increasingly widely used in many fields such as electronic price tags, e-books, billboards, conference table signs, etc.

[0004] Existing electronic paper screens generally have single, dual or multiple driver ICs (integrated circuits), and the driver IC is used to convert externally transmitted signals into voltage and timing for driving the electronic paper screen to refresh.

[0005] With the expansion of the application market, the electronic paper dual-screen system has been widely used, such as in the field of large-size display screens such as electronic paper strip screens or interactive screens. Secondly, in the field of small-size display screens such as electronic price tags and conference table cards, the electronic paper dual-screen system is also often used so that the image to be presented can be displayed on both sides of the electronic paper screen at the same time. The existing electronic paper dual-screen system is built with two independent electronic paper screens, and each electronic paper screen requires an independent drive circuit (a peripheral drive circuit that provides power, data and other signals), which will result in a high cost for the electronic paper dual-screen system.

[0006] In the prior art, in large-size display screen applications, the electronic paper screen used generally has two or more driver ICs, and the driver IC supports a master-slave drive mode. The master-slave drive mode can be used to allow the two electronic paper screens in the electronic paper dual-screen system to share a set of drive circuits, thereby reducing the cost of the electronic paper dual-screen system.

[0007] However, in the existing field of small-size display screens such as electronic price tags and conference table signs, due to cost or application scenarios, electronic paper screens with dual or multiple driver ICs are generally not used. Instead, electronic paper screens that only require a single driver IC to drive are used. Such electronic paper screens that only require a single driver IC to drive are not compatible with the master-slave drive mode, which results in a high cost for the electronic paper dual-screen system composed of electronic paper screens with a single driver IC. Figure 1 As shown, Figure 1 It is a schematic diagram of the existing electronic paper dual-screen system. Figure 1 middle:

[0008] SIP (System in package) chip system integrates MCU (Microcontroller Unit), crystal oscillator, Flash memory, capacitors, resistors, inductors and other devices into one package to achieve a complete chip system;

[0009] The electronic paper screen 1 and the electronic paper screen 2 are display units of the electronic paper dual-screen system. The electronic paper screens 1 and 2 receive signals transmitted by an external circuit through an FPC (Flexible Printed Circuit) and convert the signals into a voltage and timing for driving the electronic paper screen to refresh through an IC.

[0010] The Connector connects the electronic paper screen through the FPC and connects the matching circuit and the SIP interface. The Connector provides power to the electronic paper screen and stabilizes the power signal by connecting the matching circuit. The Connector transmits command data, image data, etc. between the electronic paper screen and the SIP chip system by connecting the SIP chip system interface.

[0011] from Figure 1 It can be seen that in the existing electronic paper dual-screen system, each electronic paper screen requires an independent set of connectors, matching circuits, and needs to occupy an independent set of SIP chip system interfaces, which will cause the cost of the electronic paper dual-screen system to be high.

[0012] refer to Figure 1 There is an existing electronic paper dual-screen system. When the screen image is updated, the existing electronic paper dual-screen system adopts a serial method to update the image, that is, the electronic paper screen 1 is updated first, and then the electronic paper screen 2 is updated. This image update method has a slow update speed and high update power consumption. Summary of the invention

[0013] An embodiment of the present invention provides an electronic paper screen, which enables the electronic paper screen with a single driver IC to support a master-slave driving mode, thereby improving the image update efficiency of an electronic paper dual-screen system composed of electronic paper screens with a single driver IC. The electronic paper screen includes: a display area, a single IC, and an FPC;

[0014] A display area, used for displaying images, including a plurality of pixels;

[0015] FPC, used to receive external signals transmitted by peripheral circuits and transmit external signals to IC;

[0016] IC, used to receive external signals transmitted by FPC, obtain voltage and timing for driving pixels in display area by processing external signals, and drive the display area to display images by using the voltage and timing, wherein the external signals include power supply signals, data signals, and master-slave driving mode signals, and the master-slave driving mode signals are used to determine whether the master-slave driving mode of the electronic paper screen is master driving mode or slave driving mode;

[0017] Among them, the IC includes multiple first-class IC pins, the FPC includes multiple first-class FPC pins, the multiple first-class IC pins are connected to the multiple first-class FPC pins in a one-to-one correspondence, and the first-class IC pins and the first-class FPC pins are used to transmit master-slave drive mode signals.

[0018] The embodiment of the present invention provides an electronic paper dual-screen system, which is used to reduce the cost of the electronic paper dual-screen system, improve the image update speed of the electronic paper dual-screen system, and reduce the image update power consumption. The electronic paper dual-screen system includes: a SIP chip system, a master electronic paper screen, a slave electronic paper screen, a master connector, a slave connector, and a matching circuit;

[0019] The master electronic paper screen and the slave electronic paper screen are the electronic paper screens described in the embodiment of the present invention.

[0020] The SIP chip system is used to receive data signals; the matching circuit is used to provide power to the master electronic paper screen and the slave electronic paper screen; the data signal includes the data to be updated of the master electronic paper screen and the data to be updated of the slave electronic paper screen;

[0021] The master connector and the slave connector both have a plurality of first-class connector pins, and the master-slave driving mode of the master connector and the master electronic paper screen is determined to be the master driving mode through the first-class connector pins of the master connector, and the master-slave driving mode of the slave connector and the slave electronic paper screen is determined to be the slave driving mode through the first-class connector pins of the slave connector;

[0022] Among them, the main connector connects the SIP chip system, the matching circuit, the slave connector and the main electronic paper screen; the slave connector is connected to the slave electronic paper screen; the main connector and the slave connector are respectively connected to the SIP chip system through a pin for transmitting a chip select signal, wherein all pins of the slave connector and the main connector connected to the SIP chip system are in the same SIP chip system interface.

[0023] In an embodiment of the present invention, an electronic paper screen is provided, which includes a display area, a single IC, and an FPC, wherein the IC includes multiple first-class IC pins, the FPC includes multiple first-class FPC pins, the multiple first-class IC pins are connected to the multiple first-class FPC pins in a one-to-one correspondence, the first-class IC pins and the first-class FPC pins are used to transmit signals of a master-slave drive mode, so that the electronic paper screen with a single driver IC supports the master-slave drive mode, thereby improving the image update efficiency of the electronic paper dual-screen system composed of the electronic paper screen with a single driver IC.

[0024] In an embodiment of the present invention, an electronic paper dual-screen system is provided, including a SIP chip system, a master electronic paper screen, a slave electronic paper screen, a master connector, a slave connector, and a matching circuit, wherein the master connector connects the SIP chip system, the matching circuit, the slave connector, and the master electronic paper screen, the master connector receives a data signal sent by the SIP chip system and a power signal sent by the matching circuit, and sends the data signal and the power signal to the slave connector and the master electronic paper screen, and the slave connector sends the data signal and the power signal to the slave electronic paper screen, thereby achieving that the data signal and the power signal simultaneously reach the master electronic paper screen and the slave electronic paper screen ; In addition, the master connector and the slave connector are respectively connected to the SIP chip system through a pin for transmitting a chip select signal, wherein all the pins of the slave connector and the master connector connected to the SIP chip system are in the same SIP chip system interface, and when the data signal and the power signal reach the master electronic paper screen and the slave electronic paper screen, the master electronic paper screen and the slave electronic paper screen respectively use their respective chip select signals (pins for transmitting chip select signals) to extract their respective data to be updated and their respective power signals from the data signal and the power signal, and the master electronic paper screen and the slave electronic paper screen respectively use their respective data to be updated and their respective power signals to drive the screen data update. In the entire electronic paper dual-screen system, only one set of matching circuits is needed to provide power, and the SIP chip system only needs to provide one SIP interface, which reduces the cost of the electronic paper dual-screen system. At the same time, when the dual screens update data, due to the support of the master-slave drive mode, the serial mode is no longer used for updating, but the image data of the two screens are updated simultaneously in parallel, which improves the image update speed of the electronic paper dual-screen system and reduces the image update power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0026] Figure 1 It is a schematic diagram of an existing electronic paper dual-screen system;

[0027] Figure 2 Schematic diagram of an electronic paper screen in an embodiment of the present invention;

[0028] Figure 3 Schematic diagram of an electronic paper dual-screen system in an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of a connector driving circuit of an electronic paper screen in an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of a connector driving circuit of an electronic paper dual-screen system in an embodiment of the present invention;

[0031] Figure 6 This is the image update process of the electronic paper dual-screen system in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0033] The applicant found that in the electronic paper dual-screen system currently used in the field of small-size display screens, each electronic paper screen requires an independent matching circuit and occupies an independent set of SIP interfaces, which not only causes the cost of the electronic paper dual-screen system to be high, but also leads to a slow update speed and high update power consumption of the electronic paper dual-screen system. To this end, the applicant proposed an electronic paper screen and a dual-screen system thereof.

[0034] Figure 2 Schematic diagram of an electronic paper screen in an embodiment of the present invention. Figure 2 As shown, the electronic paper screen includes: a display area ( Figure 2 AA part), single IC, FPC. Among them:

[0035] 1) The display area includes multiple pixels, arranged horizontally and vertically, and is mainly used to display images;

[0036] 2) FPC, which generally has multiple pins, is used to receive external signals transmitted by peripheral circuits and transmit external signals to ICs, such as connecting to PCB boards to receive external signals;

[0037] 3) IC, connecting the display area and FPC through pins, the IC is used to receive external signals transmitted by the FPC, use the external signal processing to obtain the voltage and timing of driving the pixels in the display area, and use the voltage and timing to drive the display area to display images, the external signal includes a power signal, a data signal, and a master-slave drive mode signal, the master-slave drive mode signal is used to determine the master-slave drive mode of the electronic paper screen: master drive mode or slave drive mode; the data signal includes image data, instruction data, etc.;

[0038] Among them, the IC includes multiple first-class IC pins (MS, VSYNC, HSYNC, SyncD, SyncC in the IC), the FPC includes multiple first-class FPC pins (MS, VSYNC, HSYNC, SyncD, SyncC in the FPC), the multiple first-class IC pins are connected to the multiple first-class FPC pins one by one, and the first-class IC pins and the first-class FPC pins are used to transmit master-slave drive mode signals.

[0039] It should be noted that the FPC of the electronic paper screen in the prior art does not have the first type of FPC pins (MS, VSYNC, HSYNC, SyncD, SyncC in the FPC). In the embodiment of the present invention, in order to enable the electronic paper screen with a single driver IC to support the master-slave drive mode, a plurality of first type FPC pins (MS, VSYNC, HSYNC, SyncD, SyncC in the FPC) are provided on the FPC, and the plurality of first type IC pins on the IC (MS, VSYNC, HSYNC, SyncD, SyncC in the IC) are connected to the first type FPC pins on the FPC in a one-to-one correspondence, so that the master-slave drive mode signal can be transmitted, so that the electronic paper screen with a single driver IC supports the master-slave drive mode, thereby further realizing the improvement of the image update efficiency of the electronic paper dual-screen system composed of the electronic paper screen with a single driver IC.

[0040] In an embodiment of the present invention, when the master-slave drive mode of the electronic paper screen is determined to be: master drive mode according to the master-slave drive mode signal, the electronic paper screen supports independent use, that is, it can only be used independently when the electronic paper screen is in the master drive mode; when the master-slave drive mode of the electronic paper screen is determined to be: slave drive mode according to the master-slave drive mode signal, multiple electronic paper screens support being used in slave drive mode together with an electronic paper screen in the master drive mode, that is, when the electronic paper screen is in slave drive mode, it can only be used as a slave device of other electronic paper screens in the master drive mode and used together with the master device (electronic paper screen in the master drive mode). It should be noted that when multiple electronic paper screens are driven and used synchronously together, there can be only one master device, but there can be multiple slave devices.

[0041] In one embodiment, the IC may further include a plurality of second-category IC pins, a plurality of third-category IC pins, and a plurality of fourth-category IC pins, and the FPC may further include a plurality of second-category FPC pins and a plurality of third-category FPC pins; wherein,

[0042] The FPC is connected to the peripheral circuit via a plurality of second-type FPC pins, and the plurality of second-type FPC pins are connected to a plurality of second-type IC pins in a one-to-one correspondence, and the second-type FPC pins and the second-type IC pins are used to transmit power signals;

[0043] The FPC is connected to the peripheral circuit via a plurality of third-category FPC pins, and the plurality of third-category FPC pins are connected to a plurality of third-category IC pins in a one-to-one correspondence, and the third-category FPC pins and the third-category IC pins are used to transmit data signals;

[0044] The IC is connected to each pixel of the display area through a plurality of fourth-category IC pins, and the first-category IC pins are used to transmit voltage and timing to the pixels of the display area.

[0045] In one embodiment, the IC further includes a plurality of fifth-category IC pins, and the fifth-category IC pins are used for IC damage testing or IC circuit debugging.

[0046] refer to Figure 2 For the convenience of explanation, the following assumptions are made:

[0047] 1) The resolution of the electronic paper screen is 800×600, that is, the AA area is a pixel array with 800 horizontal columns and 600 vertical rows;

[0048] 2) The model of the driver IC is JD79686, and the maximum resolution it supports is 800×600, which means it can drive 800 source lines and 600 gate lines.

[0049] In the embodiment of the present invention:

[0050] 1) Set the pins for transmitting power signals in the IC and FPC respectively. The pins for transmitting power signals in the IC and the pins for transmitting power signals in the FPC are connected one by one. Figure 2 , pins include, for example, GDR, RESE, VSHR, VDDIO, VDD, VSS, VDD_18V, VOTP, VSH, VGH, VSL, VGL, VCOM;

[0051] 2) Pins for transmitting data signals are also set in the IC and the FPC respectively. The pins for transmitting data signals in the IC and the pins for transmitting data signals in the FPC are connected one by one. Figure 2 , pins include, for example, TSCL, TSDA, BS, BUSY_N, RST_N, DC, CSB, SCL, SDA;

[0052] 3) Multiple pins connected to the display pixels are also set in the IC, and the pins S0 to S799 in the IC are connected to the Source traces S0 to S799 in the AA area in sequence, and the pins G0 to G599 in the IC are connected to the Gate traces G0 to G599 in the AA area in sequence;

[0053] 4) Other pins can also be set in the IC, for example, IC damage test or IC circuit debugging and other related pins, refer to Figure 2 , pins PCKO and PCKI are used for damage test. PCKO and PCKI are connected to each other through a connecting wire, and this connecting wire is set around the periphery of the electronic paper screen; Figure 2 FB and T_XXX are debug pins reserved for IC. They do not need to be connected and can be left disconnected under normal circumstances. Figure 2 VDDP is the power input pin of DCDC, which has the same function as VDD voltage and also belongs to the second category IC pin; Figure 2 VSSA is the analog ground pin, which has the same function as the VSS pin and also belongs to the second category IC pin.

[0054] Based on the electronic paper screen in the embodiment of the present invention, the embodiment of the present invention further provides an electronic paper dual-screen system. Figure 3 FIG. 1 is a schematic diagram of an electronic paper dual-screen system according to an embodiment of the present invention. Figure 3 As shown, the electronic paper dual-screen system includes: a SIP chip system, a master electronic paper screen, a slave electronic paper screen, a master connector, a slave connector, and a matching circuit; wherein the master electronic paper screen and the slave electronic paper screen are electronic paper screens in the embodiment of the present invention,

[0055] The SIP chip system is used to receive data signals; the matching circuit is used to provide power to the master electronic paper screen and the slave electronic paper screen; the data signal includes the data to be updated of the master electronic paper screen and the data to be updated of the slave electronic paper screen, and may also include instruction data, etc.;

[0056] The master connector and the slave connector both have a plurality of first-class connector pins, and the master-slave driving mode of the master connector and the master electronic paper screen is determined to be the master driving mode through the first-class connector pins of the master connector, and the master-slave driving mode of the slave connector and the slave electronic paper screen is determined to be the slave driving mode through the first-class connector pins of the slave connector;

[0057] Among them, the main connector connects the SIP chip system, the matching circuit, the slave connector and the main electronic paper screen; the slave connector is connected to the slave electronic paper screen; the main connector and the slave connector are respectively connected to the SIP chip system through a pin for transmitting a chip select signal, wherein all pins of the slave connector and the main connector connected to the SIP chip system are in the same SIP chip system interface.

[0058] from Figure 3 As can be seen from the schematic diagram of the electronic paper dual-screen system, when the electronic paper dual-screen system in the embodiment of the present invention is running, the SIP chip system receives and transmits data signals, the matching circuit provides power and performs voltage stabilization on the power signal. Figure 3 , the main connector receives data signals and power signals, transmits the data signals and power signals to the main electronic paper screen and the slave connector, and the slave connector transmits the data signals and power signals to the slave electronic paper screen. All transmissions and connections are realized through pin connections, with low latency and high speed. The data signals and power signals are synchronously transmitted to the main electronic paper screen and the slave electronic paper screen, and then the signals are selected through their respective chip select signals, so as to synchronously realize the data update of the main electronic paper screen and the slave electronic paper screen. In the electronic paper dual-screen system of the embodiment of the present invention, only one set of matching circuits is required to provide power supply, and the SIP chip system only needs to provide one SIP interface, which reduces the cost of the electronic paper dual-screen system. At the same time, when the dual screens update data, since the master-slave drive mode is supported, the serial mode is no longer used for updating, but the image data of the two screens are updated simultaneously in parallel, which improves the image update speed of the electronic paper dual-screen system and reduces the power consumption of image update.

[0059] In order to improve the composition structure of the electronic paper dual-screen system in the embodiment of the present invention, the electronic paper dual-screen system in the embodiment of the present invention may further include:

[0060] Battery: used as a power source to power the electronic paper dual-screen system;

[0061] Button: As an input unit, it is used to issue specific operation commands to the electronic paper dual-screen system;

[0062] NFC near field communication unit: used to communicate with external NFC devices to transmit control instructions and image data;

[0063] RF radio frequency communication unit: used to communicate with external RF devices to transmit control instructions and image data.

[0064] In one embodiment, the master connector and the slave connector both have a plurality of second type connector pins.

[0065] The main connector is connected to the matching circuit through a plurality of second-type connector pins, and the plurality of second-type connector pins of the main connector are connected one-to-one with the plurality of second-type connector pins of the slave connector and the plurality of second-type FPC pins of the main electronic paper screen;

[0066] The multiple second-type connector pins of the slave connector are also connected one-to-one with the multiple second-type FPC pins of the slave electronic paper screen; the second-type connector pins are used to transmit power signals.

[0067] In one embodiment, the master connector and the slave connector both have a plurality of third-type connector pins.

[0068] The main connector is connected to the SIP chip system interface through multiple third-category connector pins, and the multiple third-category connector pins of the main connector are correspondingly connected with multiple third-category connector pins of the slave connector and multiple third-category FPC pins of the main electronic paper screen;

[0069] The multiple third-type connector pins of the slave connector are also connected one-to-one with the multiple third-type FPC pins of the slave electronic paper screen, and the third-type connector pins are used to transmit data signals.

[0070] Figure 4 is a schematic diagram of a connector driving circuit of an electronic paper screen in an embodiment of the present invention, Figure 5 Schematic diagram of a connector driving circuit of an electronic paper dual-screen system in an embodiment of the present invention. Figure 5 In the example, Connector-1 is the master connector and Connector-2 is the slave connector. Figure 4 , Figure 5 , the connector pins of electronic paper screens can be roughly divided into four categories:

[0071] 1) Determine the first type of connector pins of the master-slave driving mode, including MS, VSYNC, HSYNC, SyncD, and SyncC. The first type of connector pins are connected to the electronic paper screen. The master-slave driving mode of the connector and the electronic paper screen can be determined by the connection method of the first type of connector pins;

[0072] In specific applications, users can set the master-slave drive mode type according to actual use needs. For example, connect the MS in the connector to VDD, and disconnect VSYNC, HSYNC, SyncD, and SyncC. This indicates the master drive mode, and the e-paper screen connected to it can be used as an independent e-paper screen.

[0073] For another example, connect the MS in connector 1 to VDD, and connect VSYNC, HSYNC, SyncD, and SyncC to the corresponding pins of connector 2, connector 3, and connector n (n is an integer), and connect the MS in connector 2, connector 3, and connector n (n is an integer) to VSS. This indicates that connector 1 is in the master drive mode, connector 2, connector 3...connector n (n is an integer) are in the slave drive mode, and connector 2, connector 3...connector n operate synchronously with connector 1 according to the signal of connector 1, so that the electronic paper screen connected to connector 1 is used as the master electronic paper screen, and the electronic paper screens connected to connector 2, connector 3...connector n are used as slave electronic paper screens. It is possible to realize data update synchronously on multiple electronic paper screens, refer to Figure 5 The pin connection method of the master connector and the slave connector.

[0074] 2) The second type of connector pins that transmit power signals, such as GDR, RESE, VSHR, VDDIO, VDD, VSS, VDD_18V, VOTP, VSH, VGH, VSL, VGL, VCOM;

[0075] refer to Figure 4 ,When the electronic paper screen is used alone, the second type of connector pins are connected to the external matching circuit to transmit the power signal;

[0076] refer to Figure 5 ,In the electronic paper dual-screen system, the second type connector pins of the main connector and the slave connector are connected one to one according to the signal definition, and share a set of matching circuits.

[0077] 3) The third type of connector pins for transmitting data signals, such as TSCL, TSDA, BS, BUSY_N, RST_N, DC, SCL, SDA. The data signals include image data, command data, etc.

[0078] refer to Figure 4 ,When the electronic paper screen is used alone, the third type connector pins are connected to the SIP chip system interface;

[0079] refer to Figure 5In the electronic paper dual-screen system, the second-category connector pins of the main connector are connected to the SIP chip system interface, and the second-category connector pins of the main connector are also connected one-to-one with multiple third-category FPC pins of the main electronic paper screen, and some of the second-category connector pins of the main connector are correspondingly connected to multiple third-category connector pins of the slave connector.

[0080] 4) Chip select signal CSB. In the electronic paper dual-screen system, the chip select signal CSB is one of the data signals and needs to be set separately. Figure 5 , the CSB of the main connector is connected to CSB-1 of the SIP chip system, and the CSB of the slave connector is connected to CSB-2 of the SIP chip system.

[0081] Figure 6 The image update process of the electronic paper dual-screen system in the embodiment of the present invention is as follows: Figure 6 As shown:

[0082] Update development;

[0083] The SIP chip system receives the update instruction, and the image data 1 that needs to be updated for EPD1 (electronic paper screen 1) and the image data 2 that needs to be updated for EPD2 (electronic paper screen 2);

[0084] The SIP chip system sends the update command and image data 1 to EPD1 through the master connector and the slave connector, and sends the update command and image data 2 to EPD2 at the same time;

[0085] EPD1 and EPD2 receive update instructions and update data to complete image update;

[0086] Update completed.

[0087] from Figure 6 It can be seen from the process that the electronic paper dual-screen system in the embodiment of the present invention supports the master-slave drive mode and no longer uses a serial update method, but instead updates the image data of the two screens simultaneously in a parallel manner, thereby improving the image update speed of the electronic paper dual-screen system and reducing the image update power consumption.

[0088] In the embodiment of the present invention, an electronic paper screen with a resolution of 800×600 and an IC of JD79686 are used for illustration, but in actual application, there is no restriction on the resolution of the electronic paper screen and the model of the IC. Similarly, the number of pins and the pin definition of different IC models are also different, which are not limited here either.

[0089] In the embodiment of the present invention, an electronic paper dual-screen system is used for illustration, but the master-slave driving mode is applicable not only to the electronic paper dual-screen system but also to the electronic paper multi-screen system, which is not limited here.

[0090] In summary, the embodiment of the present invention designs the electronic paper screen to support the master-slave drive mode, and connects the two electronic paper screens in the electronic paper dual-screen system in the peripheral circuit according to the master-slave drive mode, so that the two electronic paper screens in the electronic paper dual-screen system share a set of matching circuits and only need to occupy one set of SIP interfaces. Therefore, the electronic paper dual-screen or multi-screen system built using the master-slave drive mode can not only reduce the cost of the matching circuit, but also reduce the number of occupied SIP chip system interfaces, while also improving the update speed and reducing the update power consumption.

[0091] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electronic paper screen, characterized in that: include: Display area, single integrated circuit IC, flexible circuit board FPC; A display area, used for displaying images, including a plurality of pixels; FPC, used to receive external signals transmitted by peripheral circuits and transmit external signals to IC; IC, used to receive external signals transmitted by FPC, obtain voltage and timing for driving pixels in display area by processing external signals, and drive the display area to display images by using the voltage and timing, wherein the external signals include power supply signals, data signals, and master-slave driving mode signals, and the master-slave driving mode signals are used to determine whether the master-slave driving mode of the electronic paper screen is master driving mode or slave driving mode; Among them, the IC includes multiple first-class IC pins, the FPC includes multiple first-class FPC pins, the multiple first-class IC pins are connected to the multiple first-class FPC pins in a one-to-one correspondence, and the first-class IC pins and the first-class FPC pins are used to transmit master-slave drive mode signals.

2. The electronic paper screen according to claim 1, characterized in that: When the master-slave driving mode of the electronic paper screen is determined according to the master-slave driving mode signal as: master driving mode, the electronic paper screen supports independent use; when the master-slave driving mode of the electronic paper screen is determined according to the master-slave driving mode signal as: slave driving mode, multiple electronic paper screens support being used in slave driving mode together with an electronic paper screen in master driving mode.

3. The electronic paper screen according to claim 1, characterized in that: The IC further includes a plurality of second-category IC pins, a plurality of third-category IC pins, and a plurality of fourth-category IC pins, and the FPC further includes a plurality of second-category FPC pins and a plurality of third-category FPC pins; wherein, The FPC is connected to the peripheral circuit via a plurality of second-type FPC pins, and the plurality of second-type FPC pins are connected to a plurality of second-type IC pins in a one-to-one correspondence, and the second-type FPC pins and the second-type IC pins are used to transmit power signals; The FPC is connected to the peripheral circuit via a plurality of third-category FPC pins, and the plurality of third-category FPC pins are connected to a plurality of third-category IC pins in a one-to-one correspondence, and the third-category FPC pins and the third-category IC pins are used to transmit data signals; The IC is connected to each pixel in the display area through a plurality of fourth-category IC pins, and the first-category IC pins are used to transmit voltage and timing to the pixels in the display area.

4. The electronic paper screen according to claim 1, characterized in that: The IC also includes a plurality of fifth category IC pins, and the fifth category IC pins are used for IC damage testing or IC circuit debugging.

5. An electronic paper dual-screen system, characterized in that: include: System-level integrated SIP chip system, master e-paper screen, slave e-paper screen, master connector, slave connector, matching circuit; The master electronic paper screen and the slave electronic paper screen are the electronic paper screens according to any one of claims 1 to 4, The SIP chip system is used to receive data signals; the matching circuit is used to provide power to the master electronic paper screen and the slave electronic paper screen; the data signal includes the data to be updated of the master electronic paper screen and the data to be updated of the slave electronic paper screen; The master connector and the slave connector both have a plurality of first-class connector pins, and the master-slave driving mode of the master connector and the master electronic paper screen is determined to be the master driving mode through the first-class connector pins of the master connector, and the master-slave driving mode of the slave connector and the slave electronic paper screen is determined to be the slave driving mode through the first-class connector pins of the slave connector; Among them, the main connector connects the SIP chip system, the matching circuit, the slave connector and the main electronic paper screen; the slave connector is connected to the slave electronic paper screen; the main connector and the slave connector are respectively connected to the SIP chip system through a pin for transmitting a chip select signal, wherein all pins of the slave connector and the main connector connected to the SIP chip system are in the same SIP chip system interface.

6. The electronic paper dual-screen system according to claim 5, characterized in that: Both the master connector and the slave connector have multiple second-type connector pins. The main connector is connected to the matching circuit through a plurality of second-type connector pins, and the plurality of second-type connector pins of the main connector are connected one-to-one with the plurality of second-type connector pins of the slave connector and the plurality of second-type FPC pins of the main electronic paper screen; The multiple second-type connector pins of the slave connector are also connected one-to-one with the multiple second-type FPC pins of the slave electronic paper screen; the second-type connector pins are used to transmit power signals.

7. The electronic paper dual-screen system according to claim 5, characterized in that: Both the master connector and the slave connector have multiple third-type connector pins. The main connector is connected to the SIP chip system interface through multiple third-category connector pins, and the multiple third-category connector pins of the main connector are correspondingly connected with multiple third-category connector pins of the slave connector and multiple third-category FPC pins of the main electronic paper screen; The multiple third-type connector pins of the slave connector are also connected one-to-one with the multiple third-type FPC pins of the slave electronic paper screen, and the third-type connector pins are used to transmit data signals.

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