Multifunctional screen and system

Abstract

The invention relates to a multifunctional screen and a system. The multifunctional screen comprises an image display structure and a handwriting display structure. The system has the advantages that the image display structure is matched with the handwriting display structure, display image information and handwriting information are separated, whether the image display structure only displays the image information or not and whether the handwriting display structure only displays the handwriting information or not are mutually independent and do not interfere with each other; the handwriting display structure does not affect normal display of the image display structure; under the condition of power failure, the user can still write on the handwriting display structure to form handwriting information; power consumption is low, cost is low, and large-scale application and popularization are facilitated.

Description

Technical Field

[0001] This invention relates to the field of display screen technology, and more particularly to a multifunctional screen and system. Background Technology

[0002] In modern information interaction devices, liquid crystal displays (LCDs) have become the mainstream display component for various terminals such as smartphones, tablets, e-readers, and industrial control panels due to their advantages such as low power consumption, high contrast, and balanced color performance. From a technical perspective, traditional LCDs are typical passive display devices. Their core working mechanism is to receive image data signals transmitted from the device's main processor, precisely control the alignment of liquid crystal molecules through internal driving circuits, thereby controlling the amount of light transmitted and the color combination of each pixel unit, and ultimately converting the electrical signals into visual information that can be recognized by the human eye.

[0003] However, this classic technical architecture has a significant limitation: the LCD screen itself only has information output function and has no ability to sense or capture user input commands. In practical applications, in order to realize the interaction between users and devices, especially to meet the high-frequency demand for handwriting input (such as signing electronic documents, taking handwritten notes, drawing sketches, etc.), existing technical solutions have to adopt an integrated mode of "display and touch separation"—that is, to embed an additional independent sensing layer on the surface of the LCD panel (such as under the cover glass) or in the internal interlayer.

[0004] These sensing layers are typically designed based on capacitive coupling (capacitive touch) or electromagnetic induction (electromagnetic touch), consisting of a densely packed array of sensors, signal transmission lines, and a dedicated driver chip. Capacitive touch relies on charge transfer between the human body and electrodes to locate the touch point, requiring a transparent conductive film (such as ITO film) to be coated on the display panel surface and complex electrode patterns etched into it. Electromagnetic touch, on the other hand, achieves positioning by receiving electromagnetic signals emitted by a dedicated stylus, requiring a coil array laid beneath the panel. Regardless of the technology, this sensing system requires independent signal processing circuitry for data analysis (such as calculating touch coordinates and recognizing pen pressure), ultimately forming a fully functional but structurally complex "high-cost touch recognition module."

[0005] The existence of this module has brought multiple negative impacts to equipment design and application:

[0006] First, from a cost perspective, the addition of a touch recognition module significantly increases the bill of materials (BOM) cost of the device. The procurement costs of core components such as transparent conductive materials, high-precision sensor arrays, and dedicated driver chips are high. At the same time, the process of bonding and calibrating the sensing layer to the display panel increases manufacturing complexity, leading to lower production yields and higher manufacturing costs. For low-to-mid-range consumer electronics devices or large-scale industrial terminals, this cumulative cost can directly weaken the product's market competitiveness.

[0007] Secondly, from a system dependency perspective, the operation of the touch recognition module is entirely dependent on the device's main system. The signal acquisition from its sensor array and the processing by its driver chip both require scheduling by the device's main processor, and the power supply for the entire module is also entirely dependent on the system's main power supply. This strong dependency makes the availability of the handwriting input function deeply tied to the state of the device's main system—when the device automatically shuts down due to a depleted battery, experiences an unexpected power outage, or enters a low-battery protection mode, the interruption of the main power supply will directly cause the touch recognition module to stop working, and the handwriting input function will be completely lost.

[0008] In many real-world scenarios, this limitation can cause serious problems: for example, when operators in industrial sites experience a sudden power outage, they may need to urgently record fault information but cannot use the handwriting function; when the battery of an outdoor worker's terminal is quickly depleted due to low temperatures, they cannot temporarily record critical data by handwriting; and even in daily use, users may lose unsaved handwritten notes due to the device automatically shutting down.

[0009] In summary, existing technologies for implementing handwriting input on LCD screens struggle to balance the core requirements of "low cost and low power consumption" with "independent and reliable operation." How to construct a handwriting input mechanism that does not rely on the main system power supply and can operate continuously under extreme conditions (such as power outages), while retaining the inherent advantages of LCD screens, has become a pressing technical challenge in the field of display interaction.

[0010] Currently, no effective solutions have been proposed for the problems existing in related technologies, such as high cost, high power consumption, inability to write independently, and difficulty in use under extreme conditions (such as power outages). Summary of the Invention

[0011] The purpose of this invention is to address the shortcomings of existing technologies by providing a multifunctional screen and system that solves problems such as high cost, high power consumption, inability to write independently, and difficulty in use under extreme conditions (such as power outages).

[0012] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0013] Firstly, a multi-functional screen is provided, comprising:

[0014] An image display structure is used to display image information when an image signal is acquired;

[0015] At least one handwriting display structure, wherein the handwriting display structure is stacked with the image display structure, for forming or erasing handwriting information upon receiving a handwriting signal;

[0016] The image information displayed by the image display structure and the handwriting information displayed by the handwriting display structure are independent of each other.

[0017] In some embodiments, the image display structure is a display structure that displays image information under the drive of an image signal.

[0018] In some embodiments, the image display structure is either a liquid crystal display or an electronic ink screen.

[0019] In some embodiments, the handwriting display structure is a display structure that forms handwriting information under pressure signal drive.

[0020] In some embodiments, the handwriting display structure is a display structure that erases handwriting information under the drive of a voltage signal.

[0021] In some of these embodiments, the handwriting display structure is a display structure that erases handwriting information under the drive of an optical signal after being doped with a photoresponsive material.

[0022] In some embodiments, the handwriting display structure is a display structure in which all handwriting information is erased under the drive of a first voltage signal after being doped with a photoresponsive material, and partial handwriting information is erased under the drive of a second voltage signal and a light signal.

[0023] In some embodiments, there are multiple handwriting display structures, which are stacked on top of each other, and different handwriting display structures display different colors.

[0024] Secondly, a multi-functional screen system is provided, including:

[0025] The multi-functional screen as described in the first aspect;

[0026] A control device is connected to the image display structure and the handwriting display structure of the multi-functional screen respectively, and is used to control the image display structure and the handwriting display structure respectively;

[0027] The control device has a backup power supply device that supplies power to the handwriting display structure separately in the event of a power outage, so as to maintain the normal operation of the handwriting display structure in the event of a power outage.

[0028] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0029] This invention discloses a multifunctional screen and system that utilizes the combination of an image display structure and a handwriting display structure to separate displayed image information from written handwriting information. The image display structure only displays image information, and the handwriting display structure only displays handwriting information; the two are independent and do not interfere with each other. The handwriting display structure does not affect the normal display of the image display structure. Even when the power is off, the user can still write on the handwriting display structure to form handwriting information. It has low power consumption and low cost, which is conducive to large-scale promotion and use. Attached Figure Description

[0030] Figure 1 This is a cross-sectional view (a) of a multi-functional screen according to an embodiment of the present invention;

[0031] Figure 2 This is a cross-sectional view of the handwriting display structure according to an embodiment of the present invention;

[0032] Figure 3 This is a cross-sectional view (II) of a multi-functional screen according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram (a) of a multi-functional screen system according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram (II) of a multi-functional screen system according to an embodiment of the present invention.

[0035] The reference numerals in the accompanying drawings are as follows: 100, multi-functional screen; 110, image display structure; 120, handwriting display structure; 121, first conductive layer; 122, second conductive layer; 123, display layer;

[0036] 200. Control device; 210. First control structure; 220. Second control structure. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0040] Example 1

[0041] This embodiment relates to the multifunctional screen of the present invention.

[0042] An illustrative embodiment of the present invention, such as Figure 1 As shown, a multi-functional screen 100 includes an image display structure 110 and at least one handwriting display structure 120. The image display structure 110 is used to display image information upon acquiring an image signal; the handwriting display structure 120 is stacked on top of the image display structure 110 and is used to form or erase handwriting information upon receiving a handwriting signal.

[0043] The image information displayed by the image display structure 110 and the handwriting information displayed by the handwriting display structure 120 are independent of each other.

[0044] "Independent" means that the image information displayed by the image display structure 110 and the handwriting information displayed by the handwriting display structure 120 do not affect each other. That is, changes in the image information displayed by the image display structure 110 will not cause changes in the handwriting information displayed by the handwriting display structure 120, and changes in the handwriting information displayed by the handwriting display structure 120 will not cause changes in the image information displayed by the image display structure 110.

[0045] More specifically, whether the image display structure 110 displays image information is unrelated to the handwriting display structure 120, and whether the handwriting display structure 120 displays handwriting information is unrelated to the image display structure 110.

[0046] For example, regardless of whether the image display structure 110 displays any image information, handwriting information is only formed in the handwriting display structure 120 and not in the image display structure 110.

[0047] For example, when image information is displayed in image display structure 110, if the handwriting information formed in handwriting display structure 120 is erased, the image information of image display structure 110 will not change.

[0048] In this invention, the image display structure 110 is either a liquid crystal display screen or an electronic ink screen. The structure and manufacturing method of the image display structure 110 are conventional techniques in the art and will not be described in detail here.

[0049] In this invention, the image display structure 110 has two display modes. The first display mode is a blackboard mode, which does not display any color, i.e., it is used as a liquid crystal blackboard. The second display mode is a display screen mode, which can display images, colors, and other content.

[0050] In this invention, the handwriting signal includes a handwriting formation signal and a handwriting erasure signal. That is, when a handwriting formation signal is received, the handwriting display structure 120 forms handwriting information; when a handwriting erasure signal is received, the handwriting display structure 120 erases the handwriting information.

[0051] In this invention, the erasure signal includes a global erasure signal and a partial erasure signal. Specifically, upon receiving a global erasure signal, the handwriting display structure 120 erases all handwriting information; upon receiving a partial erasure signal, the handwriting display structure 120 erases only a portion of the handwriting information.

[0052] In this invention, the method by which the handwriting display structure 120 forms handwriting information mainly involves receiving a pressure signal. Specifically, the handwriting display structure 120 senses a pressure change, thereby forming a pressure signal, and then converts the pressure signal into a handwriting signal.

[0053] In this invention, the method for erasing handwriting information using the handwriting display structure 120 mainly involves receiving a voltage signal. Specifically, the handwriting display structure 120 receives a voltage control signal (generally a high-voltage pulse signal or a DC high-voltage signal), and then converts the voltage control signal into a global handwriting erasure signal.

[0054] Generally, in this invention, the multi-functional screen 100 has at least a writing function and a global erase function.

[0055] In this invention, the image display structure 110 is a display structure that displays image information under the drive of an image signal.

[0056] In this invention, the handwriting display structure 120 is a display structure that forms handwriting information under the drive of a pressure signal.

[0057] In this invention, the handwriting display structure 120 is a display structure that erases handwriting information under the drive of a voltage signal.

[0058] For a specific embodiment of the present invention, the handwriting display structure 120 is a three-layer structure as an example for illustration.

[0059] like Figure 2 As shown, the handwriting display structure 120 includes a first conductive layer 121, a second conductive layer 122, and a display layer 123. The second conductive layer 122 is disposed opposite to the first conductive layer 121; the display layer 123 is disposed between the first conductive layer 121 and the second conductive layer 122, and is used to form or erase handwriting information upon receiving a handwriting signal.

[0060] In this invention, the second conductive layer 122 is generally in contact with the image display structure 110. For example, the second conductive layer 122 is bonded to the image display structure 110. The bonding method includes, but is not limited to, the GFF full bonding method.

[0061] In this invention, the first conductive layer 121 is made of conductive materials, including but not limited to indium tin oxide (ITO), TCO conductive glass (FTO), polyethylene dioxythiophene (PEDOT), etc.

[0062] In some of these embodiments, the thickness of the first conductive layer 121 is 2 nm to 100 μm.

[0063] In some of these embodiments, the first conductive layer 121 includes, but is not limited to, a transparent ITO film.

[0064] The dimensions of the second conductive layer 122 match the dimensions of the first conductive layer 121. Generally, the radial dimension (such as length, width, diameter, etc.) of the second conductive layer 122 is equal to the radial dimension (such as length, width, diameter, etc.) of the first conductive layer 121, and the axial dimension (such as thickness, height, etc.) of the second conductive layer 122 is equal to the axial dimension (such as thickness, height, etc.) of the first conductive layer 121.

[0065] In this invention, the second conductive layer 122 is made of conductive materials, including but not limited to indium tin oxide (ITO), TCO conductive glass (FTO), polyethylene dioxythiophene (PEDOT), etc.

[0066] In some of these embodiments, the thickness of the second conductive layer 122 is 2 nm to 100 μm.

[0067] In some of these embodiments, the second conductive layer 122 includes, but is not limited to, a transparent ITO film.

[0068] The dimensions of the display layer 123 are matched with the dimensions of the first conductive layer 121 (second conductive layer 122). Generally, the radial dimensions (such as length, width, diameter, etc.) of the display layer 123 are equal to the radial dimensions (such as length, width, diameter, etc.) of the first conductive layer 121 (second conductive layer 122).

[0069] In this invention, the display layer 123 is made of liquid crystal material, including but not limited to cholesteric liquid crystal material.

[0070] In some of these embodiments, the thickness of the display layer 123 is 10 nm to 100 μm.

[0071] In some of these embodiments, the display layer 123 includes, but is not limited to, a liquid crystal display film.

[0072] The handwriting display structure 120 of the present invention can be prepared by a combination of roll-to-roll processing and ultraviolet curing. For example, two transparent films (first conductive layer 121 and second conductive layer 122) are coated with liquid crystal paste using a roll-to-roll process and then cured under ultraviolet light to form a liquid crystal film (display layer 123), thereby obtaining a transparent film (handwriting display structure 120). The cured liquid crystal paste (display layer 123) can sense the application of force and autonomously change its state to achieve the display of handwriting colors.

[0073] The method of using this invention is as follows:

[0074] (a) Image display structure 110 is in blackboard mode

[0075] When the image display structure 110 is in blackboard mode, the user can write on the handwriting display structure 120 with a writing tool to form handwriting information;

[0076] When it is necessary to erase handwriting information, a voltage regulation operation is performed on the handwriting display structure 120, such as applying a high-voltage pulse signal or a DC high-voltage signal to the handwriting display structure 120 to completely erase all handwriting information displayed on the handwriting display structure 120.

[0077] (ii) Image display structure 110 is in display screen mode

[0078] When the image display structure 110 is in display screen mode, the user can operate the image display structure 110 to make the image display structure 110 display image information;

[0079] Because the handwriting display structure 120 has a high transmittance, the image information displayed by the image display structure 110 can be displayed through the handwriting display structure 120;

[0080] Users can write on the handwriting display structure 120 using a writing tool to form handwriting information;

[0081] By combining handwriting information with image information, annotations can be added to the content displayed in the image, thus improving the display effect.

[0082] When it is necessary to erase handwriting information, voltage regulation operation is performed on the handwriting display structure 120, such as applying a high voltage pulse signal or a DC high voltage signal to the handwriting display structure 120 to completely erase all handwriting information displayed on the handwriting display structure 120.

[0083] At this time, the image information displayed by the image display structure 110 is unaffected;

[0084] (III) Power Outage Situation

[0085] In the event of a power outage, the image display structure 110 cannot display any image information, which can be compared to the image display structure 110 being in blackboard mode;

[0086] In this case, the user can still write on the handwriting display structure 120 using a writing tool to form handwriting information.

[0087] The technical effects of this invention are as follows:

[0088] 1) By combining the image display structure and the handwriting display structure, the displayed image information and the written handwriting information are separated. The image display structure only determines whether to display the image information, and the handwriting display structure only determines whether to display the handwriting information. The two are independent of each other and do not interfere with each other.

[0089] 2) The handwriting display structure does not affect the normal display of the image display structure;

[0090] 3) Even in the event of a power outage, the user can still write on the handwriting display structure to create handwriting information;

[0091] 4) Low power consumption and low cost, which is conducive to large-scale promotion and use.

[0092] Example 2

[0093] This embodiment is a modified embodiment of Embodiment 1. The difference between this embodiment and Embodiments 1 and 2 is that the material used to prepare the handwriting display structure 120 is different.

[0094] In this embodiment, the handwriting display structure 120 is a display structure that erases handwriting information under the drive of an optical signal after being doped with a photoresponsive material.

[0095] More specifically, the handwriting display structure 120 is a display structure that erases all handwriting information under the drive of a first voltage signal after being doped with a photoresponsive material, and erases partial handwriting information under the drive of a second voltage signal and a light signal.

[0096] In this embodiment, the multi-functional screen 100 has a partial erasing function.

[0097] In this embodiment, it includes:

[0098] 1) The material used to prepare the first conductive layer 121 is different from the material used to prepare it in Example 1;

[0099] 2) The material used to prepare the second conductive layer 122 is different from the material used to prepare it in Example 1;

[0100] 3) The material used to prepare the display layer 123 is different from that used in Example 1.

[0101] This can be any one of 1), 2), or 3), or any combination of multiple of them. That is, it includes the following seven methods: 1), 2), 3), 1)+2), 1)+3), 2)+3), 1)+2)+3).

[0102] In this embodiment, the first conductive layer 121 is made of a conductive material and a photoresponsive material.

[0103] Among them, the photoresponsive material is a photosensitive material or a material that forms a rectifying structure with a conductive material.

[0104] The rectifier structure includes, but is not limited to, a PN junction or a Schottky junction.

[0105] Among them, photoresponsive materials include, but are not limited to, titanium dioxide, gallium nitride, zinc oxide, perovskite, mercury cadmium telluride, etc.

[0106] In this embodiment, the first conductive layer 121 is prepared by photodoping.

[0107] In this embodiment, the second conductive layer 122 is made of a conductive material and a photoresponsive material.

[0108] Among them, the photoresponsive material is a photosensitive material or a material that forms a rectifying structure with a conductive material.

[0109] The rectifier structure includes, but is not limited to, a PN junction or a Schottky junction.

[0110] Among them, photoresponsive materials include, but are not limited to, titanium dioxide, gallium nitride, zinc oxide, perovskite, mercury cadmium telluride, etc.

[0111] In this embodiment, the second conductive layer 122 is prepared by photodoping.

[0112] In this embodiment, the display layer 123 is made of liquid crystal material and photoresponsive material;

[0113] Among them, photoresponsive materials are photosensitive materials.

[0114] Among them, photoresponsive materials include, but are not limited to, titanium dioxide, gallium nitride, zinc oxide, perovskite, mercury cadmium telluride, etc.

[0115] In this embodiment, at least one of the first conductive layer 121, the second conductive layer 122, and the display layer 123 is added with a photoresponsive material, which can achieve local erasure of handwriting information through the combination of light signals and voltage control signals.

[0116] The usage method of this embodiment is as follows:

[0117] When it is necessary to completely erase all the handwriting information displayed on the handwriting display structure 120, a voltage regulation operation is performed on the handwriting display structure 120, such as applying a high voltage pulse signal or a DC high voltage signal (i.e., the first voltage signal) to the handwriting display structure 120 to completely erase all the handwriting information displayed on the handwriting display structure 120.

[0118] When it is necessary to partially erase the handwriting information displayed on the handwriting display structure 120, a voltage regulation operation is performed on the handwriting display structure 120, such as applying a low-voltage pulse signal or a DC low-voltage signal (i.e., the second voltage signal) to the handwriting display structure 120, and then illuminating (i.e., the light signal) is applied to the area to be erased.

[0119] At this point, the handwriting information displayed in the illuminated area is erased; the handwriting information displayed in the unilluminated area is retained.

[0120] The technical effects of this embodiment are as follows:

[0121] 1) By improving the materials used to prepare the handwriting display structure and adding photoresponsive materials, the handwriting information displayed by the handwriting display structure can be locally erased, thereby improving the accuracy of erasure.

[0122] Example 3

[0123] This embodiment is a modified embodiment of Embodiment 2. The difference between this embodiment and Embodiment 2 is that the number of handwriting display structures 120 is different.

[0124] like Figure 3 As shown, there are several handwriting display structures 120. These handwriting display structures 120 are stacked on top of each other, and different handwriting display structures 120 display different colors.

[0125] In this embodiment, the multi-functional screen 100 has a multi-color writing function.

[0126] When the multi-function screen 100 is in multi-color writing mode, at least one handwriting display structure 120 is not subjected to voltage, and the color displayed by the multi-function screen is the superposition of the colors displayed by all the handwriting display structures 120.

[0127] When the multi-functional screen 100 is in partial erasure mode, it has the following two states: When no light irradiation signal is received, the photoresponse materials of all handwriting display structures 120 are in a non-conductive state. At this time, regardless of whether a voltage is applied to the handwriting display structure 120 or whether the direction of the voltage applied to the handwriting display structure 120 is adjusted, the electric field strength of the handwriting display structure 120 is limited; When a light irradiation signal is received, the photoresponse materials of all handwriting display structures 120 are in a conductive state. At this time, the electric field strength of the handwriting display structure 120 is strengthened, and the handwriting display structure 120 can be operated.

[0128] When the multi-function screen 100 is in global erase mode, voltage is applied to all handwriting display structures 120.

[0129] More specifically, when the multi-function screen 100 is in multi-color writing mode, if the handwriting display structure 120 does not receive a light irradiation signal, regardless of whether voltage is applied to the handwriting display structure 120, as long as the handwriting display structure 120 senses a pressure signal, all handwriting display structures 120 will display color; if the handwriting display structure 120 receives a light irradiation signal, the handwriting display structures 120 with applied voltage will not display color, while the handwriting display structures 120 without applied voltage will display color. That is, the multi-function screen 100 has the following implementation methods:

[0130] (a) A voltage is applied to the handwriting display structure 120:

[0131] 1) No light irradiation signal, no pressure signal: no color development;

[0132] 2) No color development occurs when there is a light signal but no pressure signal;

[0133] 3) No color development occurs when there is light or pressure signal.

[0134] 4) No light signal, but with pressure signal: color development;

[0135] (ii) No voltage is applied to the handwriting display structure 120:

[0136] 1) No light irradiation signal, no pressure signal: no color development;

[0137] 2) No color development occurs when there is a light signal but no pressure signal;

[0138] 3) With light and pressure signals: color development;

[0139] 4) No light signal, but pressure signal: color development.

[0140] More specifically, when the multi-functional screen 100 is in partial erase mode, if the handwriting display structure 120 does not receive a light illumination signal, all handwriting display structures 120 will display color as long as they sense a pressure signal; if the handwriting display structure 120 receives a light illumination signal, all handwriting display structures 120 will not display color. That is, the multi-functional screen 100 has the following implementation methods:

[0141] (a) A voltage is applied to the handwriting display structure 120:

[0142] 1) No light irradiation signal, no pressure signal: no color development;

[0143] 2) No color development occurs when there is a light signal but no pressure signal;

[0144] 3) No color development occurs when there is light or pressure signal.

[0145] 4) No light signal, but with pressure signal: color development;

[0146] (ii) No voltage was applied to the handwriting display structure 120:

[0147] 1) No light irradiation signal, no pressure signal: no color development;

[0148] 2) No color development occurs when there is a light signal but no pressure signal;

[0149] 3) No color development occurs when there is light or pressure signal.

[0150] 4) No light signal, but pressure signal: color development.

[0151] The usage method of this embodiment is as follows:

[0152] 1) Monochrome writing mode

[0153] Without applying voltage to all handwriting display structures 120, under physical compression, the display layers 123 of all handwriting display structures 120 of the multi-functional screen 100 simultaneously display color, and the color of the written handwriting is the superposition of the colors of all handwriting display structures 120.

[0154] 2) Multi-color writing mode

[0155] A low-voltage pulse or DC low voltage is applied to at least one handwriting display structure 120, and no voltage is applied to at least one handwriting display structure 120. Under the combined action of special wavelength light illumination (i.e., light illumination signal) and physical compression (i.e., pressure signal), the handwriting display structure 120 without applied voltage displays color, while the handwriting display structure 120 with applied voltage does not display color. The color of the written handwriting is the superposition of the colors of all the handwriting display structures 120 that have displayed color.

[0156] 3) Partial erase mode

[0157] When a low-voltage pulse or DC low voltage is applied to all handwriting display structures 120, the photoresponse material of all handwriting display structures 120 acts as an insulator in the absence of light of the corresponding wavelength, and the written handwriting cannot be erased; when light of the corresponding wavelength is applied, the irradiated area of ​​the photoresponse material becomes conductive, and the written handwriting is erased.

[0158] 4) Global Erase Mode

[0159] A high-voltage pulse or DC high voltage is applied to all handwriting display structures 120, erasing all written handwriting.

[0160] The technical effects of this embodiment are as follows:

[0161] 1) Multi-color writing: Multi-color writing can be achieved by relying on the characteristics of multi-layer handwriting display structure and light-responsive materials, which has a wider range of applications;

[0162] 2) Selective multicolor writing: Specific colors can be selected by combining voltage and light illumination signals;

[0163] 3) Low system power consumption: In monochrome writing mode, the entire system consumes virtually no power, relying solely on the properties of the liquid crystal itself for physical pressure sensing and color display;

[0164] 4) Fast response: The multi-functional screen mainly utilizes the physical properties of cholesteric liquid crystal itself and the photoelectric properties of the photoresponse medium for color display and erasure, without any additional signal processing steps in the area, resulting in extremely fast response;

[0165] 3) Multi-color writing: Multi-color writing can be achieved by relying on the characteristics of multi-layer handwriting display structure and light-responsive materials, which has a wider range of applications.

[0166] Example 4

[0167] This embodiment relates to the multifunctional screen system of the present invention.

[0168] An illustrative embodiment of the present invention, such as Figure 4 As shown, a multi-functional screen system includes a multi-functional screen 100 as described in any one of Embodiments 1 to 4 and a control device 200. The control device 200 is signal-connected to the image display structure 110 and the handwriting display structure 120 of the multi-functional screen 100, respectively, and is used to control the image display structure 110 and the handwriting display structure 120.

[0169] The control device 200 has a backup power supply device that supplies power to the handwriting display structure 120 separately in the event of a power failure, so as to maintain the normal operation of the handwriting display structure 120 in the event of a power failure.

[0170] That is, even when the image display structure 110 is powered off, the handwriting display structure 120 can still work independently.

[0171] like Figure 5 As shown, the control device 200 includes a first control structure 210 and a second control structure 220. The first control structure 210 is signal-connected to the image display structure 110 and is used to control the image display structure 110; the second control structure 220 is signal-connected to the handwriting display structure 120 and is used to control the handwriting display structure 120.

[0172] Specifically, the second control structure 220 is signal-connected to the first conductive layer 121 and the second conductive layer 122.

[0173] The second control structure 220 has a device that supplies power to the handwriting display structure 120 separately.

[0174] In this invention, the first control structure 210 and the second control structure 220 can be independent control systems. Alternatively, the second control structure 220 can be a bypass system of the first control structure 210.

[0175] In some embodiments, the first control structure 210 is a microcontroller system, which includes at least a control circuit, a power supply module, and a drive module. The power supply module is connected to the control circuit; the drive module is connected to both the control circuit and the image display structure 110.

[0176] In some of these embodiments, the control circuitry includes, but is not limited to, a microcontroller and low-power circuitry.

[0177] In some embodiments, the driver module includes, but is not limited to, logic gates, chips, such as STC and STM.

[0178] Furthermore, the first control structure 210 also includes a communication module. This communication module is connected to the control circuit and is used for communication with the outside world.

[0179] In some embodiments, the communication module includes, but is not limited to, Bluetooth sensors, antennas, such as the SKYLAB Bluetooth module and the 2.4G wireless module.

[0180] When the second control structure 220 is an independent microcontroller system, the second control structure 220 includes at least a control circuit, a power supply module, and a drive module. The power supply module is connected to the control circuit; the drive module is connected to both the control circuit and the handwriting display structure 120.

[0181] In some of these embodiments, the control circuitry includes, but is not limited to, a microcontroller and low-power circuitry.

[0182] In some embodiments, the driver module includes, but is not limited to, logic gates, chips, such as STC and STM.

[0183] Furthermore, the second control structure 220 also includes a communication module. This communication module is connected to the control circuit and is used for communication with the outside world.

[0184] In some embodiments, the communication module includes, but is not limited to, Bluetooth sensors, antennas, such as the SKYLAB Bluetooth module and the 2.4G wireless module.

[0185] When the second control structure 220 is a bypass system of the first control structure 210, the second control structure 220 includes at least a power supply module. The power supply module is connected to the handwriting display structure 120 and is used to supply power.

[0186] The usage method of this embodiment is basically the same as that of Embodiments 1 to 3, and will not be repeated here.

[0187] The technical effects of this embodiment are basically the same as those of Embodiments 1 to 3, and will not be repeated here.

[0188] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-functional screen, characterized in that, include: An image display structure is used to display image information when an image signal is acquired; At least one handwriting display structure, wherein the handwriting display structure is stacked with the image display structure, for forming or erasing handwriting information upon receiving a handwriting signal; The image information displayed by the image display structure and the handwriting information displayed by the handwriting display structure are independent of each other.

2. The multifunctional screen according to claim 1, characterized in that, The image display structure is a display structure that displays image information under the drive of an image signal.

3. The multifunctional screen according to claim 1, characterized in that, The handwriting display structure is a display structure that generates handwriting information under the drive of a pressure signal.

4. The multifunctional screen according to claim 3, characterized in that, The handwriting display structure is a display structure that erases handwriting information under the drive of a voltage signal.

5. The multifunctional screen according to claim 3, characterized in that, The handwriting display structure is a display structure that erases handwriting information under the drive of an optical signal after being doped with a photoresponsive material.

6. The multifunctional screen according to claim 3, characterized in that, The handwriting display structure is a display structure in which all handwriting information is erased under the drive of a first voltage signal after being doped with a photoresponsive material, and partial handwriting information is erased under the drive of a second voltage signal and a light signal.

7. The multifunctional screen according to any one of claims 1 to 6, characterized in that, The handwriting display structure comprises several entities, which are stacked on top of each other, wherein different handwriting display structures display different colors.

8. A multi-functional screen system, characterized in that, include: The multi-functional screen as described in any one of claims 1 to 7; A control device is connected to the image display structure and the handwriting display structure of the multi-functional screen respectively, and is used to control the image display structure and the handwriting display structure respectively; The control device has a backup power supply device that supplies power to the handwriting display structure separately in the event of a power outage, so as to maintain the normal operation of the handwriting display structure in the event of a power outage.

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