Optical writing pen, electronic paper and method

Abstract

The application discloses a light writing pen, electronic paper and a method. The light writing pen comprises: a writing pen body, a pressure sensor is arranged at a pen tip position of the writing pen body; a light emitting element is arranged in the writing pen and can form light spots with different areas on a writing plane; a control unit is connected with the pressure sensor and the light emitting element respectively, and the control unit is configured to receive writing pressure sent by the pressure sensor and control the size of the light spot area and the illumination intensity according to the pressure. The application can switch the line thickness at any time based on pressure feedback during writing, and writing has no delay.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid crystal writing, in particular to a light writing pen, electronic paper and method. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] The electronic paper or electronic ink in the prior art has a structure comprising a conductive layer, an electronic ink layer and a TFT substrate layer arranged in sequence, wherein the TFT substrate layer has a plurality of pixel units arranged in an array, each pixel unit comprising a pixel electrode and a thin film field effect transistor (hereinafter referred to as TFT) connected to the pixel electrode, and each TFT is provided with a set voltage by a driving circuit to control the TFT to be turned on and provide a voltage to the pixel electrode connected thereto, so that an electric field is formed between the pixel electrode and the conductive layer to realize the display of the electronic paper.

[0004] At present, the electronic paper mostly uses an electromagnetic pen for writing, but when writing with the electromagnetic pen, the position of the electromagnetic pen head needs to be detected first, and then the TFT at the corresponding position is driven to be turned on by voltage to apply a voltage to the pixel electrode corresponding to the TFT, thereby realizing writing on the electronic paper. This process inevitably causes a certain delay in writing, affecting the user experience.

[0005] In addition, when writing with the electromagnetic pen, the thickness of the writing trace needs to be pre-selected, and the corresponding thickness of the writing trace is displayed by software control; if the thickness of the writing trace is to be switched, it needs to be re-selected, and the thickness of the writing trace cannot be switched at any time during writing. SUMMARY

[0006] In order to solve the above problems, the present application provides a light writing pen, electronic paper and method, which utilizes the light sensitivity of the TFT device to realize the conduction of the TFT in a set area by applying light, and directly realizes writing on the electronic paper; and combines the feedback of the writing pressure to realize the thickness control of the writing trace.

[0007] In some embodiments, the following technical solutions are adopted:

[0008] A light writing pen comprises:

[0009] A writing pen body, a pressure sensor is arranged at the position of the pen tip of the writing pen body;

[0010] A light emitting element is arranged in the writing pen and can form light spots of different areas on a writing plane;

[0011] The control unit is connected with the pressure sensor and the light-emitting element respectively, and is configured to receive the writing pressure sent by the pressure sensor and control the size of the light spot area and the illumination intensity according to the pressure.

[0012] Further, the control unit controls the size of the light spot area according to the pressure, specifically:

[0013] The corresponding relationship between different pressure ranges and light spot areas is pre-configured;

[0014] Based on the detected pressure value, the light spot area corresponding to the pressure range where the pressure value is located is matched;

[0015] The light-emitting element is controlled based on the matched light spot area to form a light spot with a corresponding area on the writing plane.

[0016] Further, the light emitted by the light-emitting element includes visible light, infrared light, and ultraviolet light.

[0017] Further, the writing pen body is provided with a switch for controlling the opening and closing of the light-emitting element.

[0018] Further, the light-emitting element includes multiple rings of lamp groups sequentially enclosed from the inside to the outside, each ring of lamp groups is enclosed by one or more lamp columns, each lamp column includes a light guide column, a lamp bead arranged in the light guide column, and a light shielding paint surface arranged on the outer layer of the light guide column; each lamp bead is individually controlled by the control unit.

[0019] Further, the light-emitting element includes multiple light guide rings sequentially stacked and arranged from the inside to the outside; each light guide ring is provided with a lamp bead, and the outer layer of each light guide ring is coated with a light shielding paint surface; each lamp bead is individually controlled by the control unit.

[0020] In some other embodiments, the following technical solutions are adopted:

[0021] An electronic paper includes a conductive layer, an electronic ink layer, and a TFT substrate layer arranged sequentially, characterized in that it further includes the light writing pen described above.

[0022] The control unit controls all TFTs in the TFT substrate layer to be in a critical conduction state, controls the size and intensity of the light spot area formed by the light-emitting element by detecting the pressure value of the contact between the writing pen and the electronic paper, makes the TFTs in the light spot coverage area conductive, thereby inputting a set voltage to the corresponding pixel electrode, forming an electric field at the position where the pixel electrode and the conductive layer overlap in space, and realizing the display of the writing trace.

[0023] Changing the pressure value of the contact between the writing pen and the electronic paper can change the size of the light spot area formed by the light-emitting element, thereby changing the thickness of the writing trace.

[0024] Further, by detecting the pressure value of the writing pen contacting the electronic paper, the size of the light spot area formed by the light emitting element is controlled, specifically:

[0025] The corresponding relationship between different pressure ranges and light spot areas is pre-configured;

[0026] Based on the detected pressure value, the light spot area corresponding to the pressure range where the pressure value is located is matched;

[0027] Based on the matched light spot area, the light emitting element is controlled to form a light spot with a corresponding area on the writing plane.

[0028] In other embodiments, the following technical solutions are adopted:

[0029] A writing display method of electronic paper, comprising:

[0030] Control all TFTs in the TFT substrate layer to be in a critical conduction state;

[0031] By detecting the pressure value of the writing pen contacting the electronic paper, the size and intensity of the light spot area formed by the light emitting element are controlled, so that the TFTs in the light spot coverage area are turned on, thereby inputting a set voltage to the corresponding pixel electrode, so that an electric field is formed at the position where the pixel electrode and the conductive layer overlap in space, realizing the display of the writing trace;

[0032] Changing the pressure value of the writing pen contacting the electronic paper can change the size of the light spot area formed by the light emitting element, thereby changing the thickness of the writing trace.

[0033] Further, by detecting the pressure value of the writing pen contacting the electronic paper, the size of the light spot area formed by the light emitting element is controlled, specifically:

[0034] The corresponding relationship between different pressure ranges and light spot areas is pre-configured;

[0035] Based on the detected pressure value, the light spot area corresponding to the pressure range where the pressure value is located is matched;

[0036] Based on the matched light spot area, the light emitting element is controlled to form a light spot with a corresponding area on the writing plane.

[0037] Compared with the prior art, the beneficial effects of the present application are:

[0038] (1) The light writing pen with variable line thickness of the present application can control the size of the light spot area formed by the light emitting element based on the pressure between the pen tip and the hand writing surface during writing, and can realize the TFT conduction of the area covered by the light spot on the electronic paper by using the light sensitive characteristics of the TFT device, and then realize the display of the writing trace on the electronic paper. Meanwhile, by combining the feedback of the writing pressure, the size of the light spot area is controlled to realize the thickness control of the writing trace.

[0039] (2) The writing pen and electronic paper of the present application do not need to select the thickness of the writing trace in advance, and do not need to control through software, and can realize the switching of the thickness of the writing trace at any time based on the pressure feedback during writing. Moreover, by using the light sensitive characteristics of the TFT device, the process of detecting and positioning the writing pen tip is omitted, and the conduction of the TFT device can be directly controlled, the writing display has no delay, and the user experience is good.

[0040] Other features and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 It is a light writing pen structure schematic diagram in the embodiment one of the present application;

[0042] Fig. 2(a) is a pen tip structure schematic diagram in the embodiment one of the present application;

[0043] Fig. 2(b) is a light emitting element structure schematic diagram in the embodiment one of the present application;

[0044] Figure 3 It is a single lamp column sectional view in the embodiment one of the present application;

[0045] Figure 4 It is a light writing pen structure schematic diagram in the embodiment two of the present application;

[0046] Fig. 5(a) is a pen tip structure schematic diagram in the embodiment two of the present application;

[0047] Fig. 5(b) is a light emitting element structure schematic diagram in the embodiment two of the present application;

[0048] Figure 6 It is a light emitting element sectional view in the embodiment two of the present application;

[0049] Among them, 1. writing pen body, 2. pen tip, 3. lamp bead, 4. light shielding paint surface, 5. light guide column, 6. light guide ring. DETAILED DESCRIPTION

[0050] It should be noted that the following detailed description is illustrative only, and is intended to provide further description in order to provide a thorough understanding of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application pertains.

[0051] It is also important to note that the use of the terms "preferably", "preferably", "more preferably", "most preferably" and the like are not used to limit the scope of example embodiments described herein but to enhance the reader's understanding of certain present example embodiments. It is further noted that the description provided herein outlines a number of specific example embodiments, and that the scope of the application is not limited to these specific example embodiments. In the description provided herein, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without these specific details. In other instances, well-known methods, procedures, components, and networks have not been described in detail so as not to unnecessarily obscure aspects of the present application.

[0052] Embodiment One

[0053] In one or more embodiments, a light writing pen is disclosed, in combination Figure 1 , specifically comprising:

[0054] (1) a writing pen body 1, provided with a pressure sensor at the position of the pen tip of the writing pen body; the pressure sensor can sense the pressure when the writing pen contacts the writing surface.

[0055] (2) a light emitting element, provided in the writing pen (such as at the position of the pen head 2), and capable of forming light spots of different areas on the writing surface; the pen head 2 of the writing pen is made of a light-transmitting material, and the light generated by the light emitting element can pass through the pen head 2 to form a light spot on the writing surface; the light emitting element is a light emitting lamp group composed of a plurality of lamp beads, and by controlling the number and position of the light emitting lamp beads in the light emitting lamp group, the size of the light spot formed can be changed. It should be noted that the light spot refers to the light irradiation area on the writing surface, i.e. the light irradiation surface.

[0056] As a specific embodiment, the structure of the light emitting element is shown in FIGS. 2(a)-(b), and the light emitting element specifically comprises: a plurality of rings of lamp groups successively enclosed from the inside out, each ring of lamp groups is enclosed by a plurality of lamp columns, and the innermost ring is one lamp column; in combination Figure 3 Each lamp column comprises a light guide column 5, a lamp bead 3 provided in the light guide column, and a light shielding paint surface 4 provided on the outer layer of the light guide column; each lamp bead 3 is controlled to be turned on or off by the control unit. When the lamp bead is turned on, each individual light guide column will guide light to form a light spot on the writing board surface, wherein the light shielding paint surface plays a shielding role to avoid light overflow of the light guide column.

[0057] The control unit controls the corresponding lamp beads to be turned on according to the size of the light spot required (such as all the lamp beads in the two rings of lamp groups of the innermost layer and the penultimate layer are turned on), so as to form a light spot of a set size on the writing board surface.

[0058] (3) a control unit connected with the pressure sensor and the light-emitting element, the control unit configured to receive the writing pressure sent by the pressure sensor and control the size of the light spot and the illumination intensity according to the pressure.

[0059] In this embodiment, when the control unit detects that the writing pen tip position has pressure feedback, the control unit will control the corresponding number and position of light-emitting lamp beads to light up according to the pressure value, thereby forming a light spot of a corresponding area.

[0060] The corresponding relationship between different pressure ranges and light spot areas is pre-configured; different light spot areas correspond to the lighting of different numbers and positions of light-emitting lamp beads, and the more the number of light-emitting lamp beads lit from the inside to the outside, the larger the light spot area formed.

[0061] Then, based on the detected real-time pressure value during writing, the pressure range to which the pressure value belongs is matched, and the light spot area corresponding to the pressure range is matched.

[0062] Based on the matched light spot area, the corresponding number of light-emitting lamp beads is controlled to light up, thereby forming a light spot of a corresponding area on the writing plane.

[0063] In this embodiment, the light emitted by the light-emitting element includes visible light, infrared light, or ultraviolet light, etc., which can be selected as needed.

[0064] As an optional solution, a switch for controlling the opening and closing of the light-emitting element is provided on the writing pen body, and when the switch is turned on, the lamp beads will be controlled to light up, and when the switch is turned off, even if pressure is generated at the writing pen tip position, the lamp beads will not be controlled to light up, thereby ensuring that the lamp beads are lit only when needed and preventing false triggering.

[0065] Embodiment Two

[0066] In one or more embodiments, a light writing pen is disclosed, which combines Figure 4 The light writing pen includes: a writing pen body 1, a light-emitting element, and a control unit.

[0067] The writing pen of this embodiment is different from the writing pen of Embodiment One in that the structure of the light-emitting element is different.

[0068] In combination with FIGS. 5(a)-(b) and Figure 6 The light-emitting element includes: a plurality of light guide rings 6 arranged in layers from the inside to the outside; the plurality of light guide rings are nested from the inside to the outside; each light guide ring is provided with a lamp bead 3; the outer layer of each light guide ring 6 is coated with a light-blocking paint surface 4; and each lamp bead 3 is controlled to open and close by the control unit.

[0069] The pen head structure of the light writing pen in the embodiment is a circular ring wrapped layer structure, each lamp bead is controlled by the control unit individually, when the lamp bead is lighted up, the light spot is formed on the board surface by the light guide column of each single body, wherein the light shielding paint surface plays a shielding role to avoid the light overflow of the light guide body.

[0070] The control unit controls the corresponding lamp bead to light up according to the size of the required light spot (such as the lamp bead in the light guide circular ring of the innermost layer and the penultimate layer), so as to form the light spot with the set size on the writing board surface.

[0071] The other structures of the light writing pen in the embodiment are the same as those in the first embodiment, and will not be described in detail.

[0072] Embodiment three

[0073] In one or more embodiments, an electronic paper is disclosed, which comprises a conductive layer, an electronic ink layer and a TFT substrate layer arranged in sequence, a plurality of pixel units are arranged in an array on the TFT substrate layer, each pixel unit comprises a pixel electrode and a TFT connected with the pixel electrode; all the TFTs in the TFT substrate layer are controlled to be in a critical conduction state, at this time, when the TFT receives light irradiation with a set light intensity, the TFT will be turned on, thereby applying a voltage to the pixel electrode connected with the TFT, an electric field will be formed at the position where the pixel electrode and the conductive layer overlap in space, and the electric field can drive the corresponding pixel electrode to display the writing trace.

[0074] In the embodiment, the light writing pen described in the first embodiment or the second embodiment is used to write on the electronic paper; the pressure value of the contact between the writing pen and the electronic paper is detected, the pressure value is fed back to the control unit, thereby controlling the size and intensity of the light spot area formed by the light emitting element, so that all the TFTs in the light spot coverage area are turned on, thereby inputting a set voltage to the pixel electrodes connected with the turned-on TFTs, an electric field is formed at the position where the pixel electrodes and the conductive layer overlap in space, and the pixel electrodes are driven to display the writing trace.

[0075] When the pressure value of the contact between the writing pen and the electronic paper changes, the size of the light spot area formed by the light emitting element can be changed, thereby changing the thickness of the writing trace.

[0076] In the embodiment, the pressure value of the contact between the writing pen and the electronic paper is detected, and the size of the light spot area formed by the light emitting element is controlled, and the specific process is as follows:

[0077] A corresponding relationship between different pressure ranges and light spot areas is configured in advance;

[0078] Based on the detected pressure value, the light spot area corresponding to the pressure range where the pressure value is located is matched;

[0079] The light emitting element is controlled based on the matched light spot area to form a light spot with a corresponding area on the writing plane.

[0080] The method of the embodiment can realize real-time adjustment of the thickness of the writing notes during writing, without pre-selection of the thickness of the writing traces, and without software control, and the writing is not delayed.

[0081] Embodiment three

[0082] In one or more embodiments, a writing display method of electronic paper is disclosed, comprising the following processes:

[0083] (1) Control all TFTs in the TFT substrate layer to be in a critical conduction state;

[0084] (2) By detecting the pressure value of the contact between the writing pen and the electronic paper, the size and intensity of the light spot area formed by the light emitting element are controlled, so that the TFTs in the light spot coverage area are turned on, thereby inputting the set voltage to the corresponding pixel electrode, so that an electric field is formed at the position where the pixel electrode and the conductive layer overlap in space, realizing the display of the writing trace;

[0085] (3) Changing the pressure value of the contact between the writing pen and the electronic paper can change the size of the light spot area formed by the light emitting element, thereby changing the thickness of the writing trace.

[0086] In the embodiment, the size of the light spot area formed by the light emitting element is controlled by detecting the pressure value of the contact between the writing pen and the electronic paper, specifically:

[0087] (2-1) The corresponding relationship between different pressure ranges and light spot areas is pre-configured;

[0088] (2-2) Based on the detected pressure value, the light spot area corresponding to the pressure range where the pressure value is located is matched;

[0089] (2-3) The light emitting element is controlled based on the matched light spot area to form a light spot with a corresponding area on the writing plane.

[0090] The specific implementation of the above process is the same as that in Embodiment three, and will not be described in detail.

[0091] Although the specific embodiments of the present application are described above with reference to the accompanying drawings, it is not a limitation on the protection scope of the present application, and those skilled in the art should understand that various modifications or changes made by those skilled in the art on the basis of the technical solutions of the present application without creative labor are still within the protection scope of the present application.

Claims

1. An optical writing pen, characterized by comprising: The application relates to a light writing pen, which comprises the following parts: a writing pen body, the tip of the writing pen body is provided with a pressure sensor; the pressure sensor is used for sensing the writing pressure when the writing pen contacts a writing surface; a light emitting element is arranged in the writing pen and can form light spots with different areas on a writing plane; the light emitting element is a light emitting lamp group composed of a plurality of lamp beads; the size of the formed light spot area can be changed by controlling the number and position of the light emitting lamp beads in the light emitting lamp group; a control unit is connected with the pressure sensor and the light emitting element respectively, the control unit is configured to receive the writing pressure sent by the pressure sensor and control the size of the light spot area according to the pressure; the control unit controls the size of the light spot area according to the pressure, specifically as follows: a corresponding relationship between different pressure ranges and light spot areas is configured in advance; based on the detected pressure value, the light spot area corresponding to the pressure range where the pressure value is located is matched; and the light emitting element is controlled based on the matched light spot area to form a light spot with a corresponding area on the writing plane. The light emitted by the light emitting element comprises visible light, infrared light and ultraviolet light. A switch for controlling the opening and closing of the light emitting element is arranged on the writing pen body. The light emitting element comprises a plurality of lamp groups which are sequentially surrounded from inside to outside, each lamp group is surrounded by a plurality of lamp columns, each lamp column comprises a light guide column, a lamp bead arranged in the light guide column and a light shielding paint surface arranged on the outer layer of the light guide column; each lamp bead is independently controlled to open and close by the control unit. The light emitting element comprises a plurality of light guide rings which are sequentially arranged in layers from inside to outside; one lamp bead is arranged in each light guide ring, and a light shielding paint surface is coated on the outer layer of each light guide ring; each lamp bead is independently controlled to open and close by the control unit. The application further relates to the following parts: The light writing pen of any one of claims 1-5; All TFTs in the TFT substrate layer are controlled to be in a critical conduction state, the size of the light spot area formed by the light emitting element is controlled by detecting the pressure value of the contact between the writing pen and the electronic paper, the TFTs in the light spot coverage area are turned on so that a set voltage is input into the corresponding pixel electrode, an electric field is formed at the position where the pixel electrode and the conductive layer spatially overlap, and the display of the writing trace is realized; 2. An optical writing pen as claimed in claim 1, characterized in that The size of the light spot area formed by the light emitting element can be changed by changing the pressure value of the contact between the writing pen and the electronic paper, so that the thickness of the writing trace is changed.

3. An optical writing pen as claimed in claim 1, characterized in that The size of the light spot area formed by the light emitting element is controlled by detecting the pressure value of the contact between the writing pen and the electronic paper, specifically as follows: a corresponding relationship between different pressure ranges and light spot areas is configured in advance; based on the detected pressure value, the light spot area corresponding to the pressure range where the pressure value is located is matched; and the light emitting element is controlled based on the matched light spot area to form a light spot with a corresponding area on the writing plane.

4. An optical writing pen as claimed in claim 1, wherein The application further relates to the following parts:

5. An optical writing pen as claimed in claim 1, wherein All TFTs in the TFT substrate layer are controlled to be in a critical conduction state; 6. An electronic paper writing device comprising, in order, a conductive layer, an electronic ink layer, and a TFT substrate layer, characterized by The size of the light spot area formed by the light emitting element is controlled by detecting the pressure value of the contact between the writing pen and the electronic paper, the TFTs in the light spot coverage area are turned on so that a set voltage is input into the corresponding pixel electrode, an electric field is formed at the position where the pixel electrode and the conductive layer spatially overlap, and the display of the writing trace is realized. ​ ​ ​ 7. An electronic paper writing device according to claim 6, wherein ​ ​ ​ ​ 8. A writing display method of the electronic paper writing device according to any one of claims 6 to 7, characterized by, ​ ​ ​ The pressure value of the writing pen contacting the electronic paper is changed, the size of the light spot area formed by the light emitting element is changed, and the thickness of the writing trace is changed.

9. The writing display method according to claim 8, wherein The size of the light spot area formed by the light emitting element is controlled by detecting the pressure value of the writing pen contacting the electronic paper, specifically: A corresponding relationship between different pressure ranges and light spot areas is preconfigured; Based on the detected pressure value, the light spot area corresponding to the pressure range in which the pressure value is located is matched; The light emitting element is controlled based on the matched light spot area to form a light spot with a corresponding area on the writing plane.

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