KR102486202B1 - optical digital pen by use of pen tip of light scattering material - Google Patents

Abstract

The present invention generally relates to an optical electronic pen structure. More specifically, the present invention relates to an optical electronic pen having a pen tip with a light-scattering agent, which is capable of irradiating a display panel with a constant and uniform amount of light at various irradiation angles since a pen tip member using a light-scattering agent is employed on an optical electronic pen such that the optical electronic pen can be used effectively on electronic devices such as tablet PCs and laptop computers, wherein there is no need for a separate structure for light scattering (e.g. light scattering plate, light guide plate, light diffusion plate, etc.) such that a slimmed optical electronic pen can be manufactured. According to the present invention, the optical electronic pen has an advantage of being effectively used with a smooth surface of a display panel such as a tablet PC or laptop computer. In particular, according to the present invention, there is an advantage that the optical electronic pen can be manufactured to be slim.

Description

Optical digital pen with a light scattering pen tip {optical digital pen by use of pen tip of light scattering material}

The present invention generally relates to an optical electronic pen structure.

In particular, the present invention adopts a pen tip member to which a light scattering agent is applied to an optical electronic pen so that light of various irradiation angles can be irradiated to the display panel in a constant and uniform light amount, so that optical devices such as tablet PCs or laptop computers can be applied. The light scattering agent pen tip is configured so that the electronic pen can be used satisfactorily and a separate structure for light scattering (e.g., light scattering plate, light guide plate, light diffusion plate, etc.) is not required, so that the optical electronic pen can be manufactured slimly. It relates to an optical electronic pen provided.

In general, electronic pens (smart pens, touch pens) are used for displaying user's writing contents on electronic devices (e.g., laptop computers, smartphones, electronic blackboards, etc.) and saving them as files. When a user writes on special paper printed with a pattern, the electronic pen reads the trajectory information and transmits it wirelessly to the electronic device.

As electronic pen functions are being applied to premium products such as tablet PCs and laptop computers, and note-taking apps such as Notability and GoodNotes are also developing, interest in electronic pens for electronic devices is growing.

As an electronic pen solution, an EMR (ElectroMagnetic Resonance) type stylus pen technology and an electrostatic type active pen technology are generally used. However, these technologies are not only technically difficult to secure performance in displays of 10 inches or larger, but also require a two-dimensional sensor array to be installed on the display panel, which greatly increases manufacturing cost and changes form factor (e.g., folding, rolling, sliding, etc.) is difficult to cope with.

An optical digital pen is being developed as a pen solution for electronic devices. In the optical method, since only the position code needs to be formed on the display by attaching a transparent film with a dot pattern to the display panel, etc., even if the display size increases, there is little decrease in electronic pen performance or increase in manufacturing cost, and it can effectively respond to change in form factor.

[FIG. 1] is a diagram conceptually showing the internal configuration and operation method of the optical electronic pen 10, and [FIG. 2] is a block diagram showing cooperative operation between the optical electronic pen 10 and the smart terminal device 400. .

When writing on the display panel 200 with the pen body 11 being gripped, the pen tip 12 forms a motion trajectory while in contact with the surface of the display panel 200 . At this time, the display panel 200 may be made of various materials. It may be made of a general paper material, or may be made of a liquid crystal (LCD) or organic light emitting diode (OLED) element made of glass or reinforced plastic.

The electronic pen controller 14 identifies the fact that the user is writing notes through the pressure sensing unit 13 . Since the pressure sensing unit 13 is rear supported by the pressure sensor support unit 13a, it can sense the pressure applied to the pen tip 12 by writing. In general, when the electronic pen control member 14 identifies the fact of writing, it controls the IR light emitting unit 17 to follow the movement of the pen tip 12 and light (eg, infrared (IR) light) on the outer surface of the display panel 200. ) to investigate.

The light emitted by the IR light emitting unit 17 is reflected from the surface of the display panel 200, and the IR light receiving unit 16 receives the reflected light. A location code 210 is printed or displayed on the display panel 200 . The location code 210 may be implemented as a dot pattern formed according to a special encoding rule. For example, a transparent film on which a dot pattern is printed with an infrared absorbing ink made of a phthalocyanine-based compound, a naphthalocyanine-based compound, or an aminium-based compound is attached to the display panel 200, and the IR light emitting unit 17 is placed on the display panel 200. to irradiate this infrared ray. When the IR light receiving unit 16 collects the reflected light (IR reflected light), the location code 210 information corresponding to the movement trajectory of the pen tip 12 is also acquired. The IR light receiving unit 16 may include an IR filter unit 16a, a CMOS optical unit 16b, and an IR sensor unit 16c.

The coordinate calculation unit 14a of the electronic pen control unit 14 analyzes the location code 210 acquired by the IR light receiving unit 16 and obtains a series of location information of the movement of the pen tip 12 on the display panel 200. Acquire The location information obtained by the coordinate calculation unit 14a is transmitted to the terminal communication unit 410 of the smart terminal device 400 through the wireless communication unit 18 through short-range wireless communication (eg, Bluetooth).

The hardware controller 14b of the electronic pen controller 14 controls the hardware of the optical electronic pen 10 as a whole. For example, the hardware controller 14b receives pressure sensing information from the pressure sensing unit 13, controls turning on or off the IR light emitting unit 17, and controls the operation of the IR light receiving unit 16. .

Then, the terminal control unit 420 of the smart terminal device 400 displays the movement trajectory of the pen tip 12 on the terminal panel unit 430 based on a series of location information received through the terminal communication unit 410. It is general that the terminal panel unit 430 corresponds to the display panel 200, but is not limited thereto.

In this way, in order for the smart terminal device 400 to accurately display the content (trajectory) written by the user, the IR light receiving unit 16 of the optical electronic pen 10 may acquire the position code 210 of the display panel 200. For this, the light irradiated from the IR light emitting unit 17 must be properly transmitted to the IR light receiving unit 16 after being reflected by the display panel 200 .

[Fig. 3] is an exemplary diagram showing the use state of the optical electronic pen 10 according to the panel material in the prior art.

[Fig. 3] (a) shows a state in which the optical electronic pen 10 is used on a panel 201 made of a rough surface material, for example, paper. In the case of using the panel 201 made of paper, regardless of whether the optical electronic pen 10 is upright or tilted, the light irradiated from the IR light emitting unit 17 is reflected from the panel 201 and then applied to the IR light receiving unit 16. can be conveyed Since the rough surface of the panel 201 diffusely reflects the light irradiated from the IR light emitting unit 17, a part of the reflected light enters the IR light receiving unit 16 and the position code 211 can be read. Therefore, the panel 201 made of paper can be used without worrying about the tilt angle of the optical electronic pen 10 .

[Fig. 3] (b) shows a state that occurs when the optical electronic pen 10 is used on a panel 202 made of a smooth surface material, for example, glass or transparent plastic material. In the case of using the panel 202 made of glass or transparent plastic, when the optical electronic pen 10 is tilted more than a certain amount, the light irradiated from the IR light emitting unit 17 is reflected from the panel 202 and then the IR light receiving unit 16 ), it becomes difficult to read the position code 212. The smooth surface of the panel 202 uniformly and symmetrically reflects the light emitted from the IR light emitting unit 17 at the angle of incidence, so when the optical electronic pen 10 is tilted, the reflected light entering the IR light receiving unit 16 gradually decreases. , the position code 212 cannot be read if it exceeds the critical angle.

If the optical electronic pen 10 is tilted more than a certain amount on a panel material having such a smooth surface, the amount of reflected light entering the IR light receiving unit 16 falls below a critical value, so that the optical electronic pen 10 cannot operate normally. Accordingly, there has been a perception that the optical electronic pen 10 is not suitable for electronic devices such as tablet PCs or laptop computers.

Korean Patent Registration No. 10-0408518 (2003.11.24) "Electronic pen data input device for computer and method for measuring coordinates" Republic of Korea Patent No. 10-0438846 (2004.06.24) "Pen type mouse device" Republic of Korea Patent Registration No. 10-2109649 (2020.05.06) "Electronic pen coordinate correction method and portable electronic device supporting it" Republic of Korea Patent Registration No. 10-2213541 (2021.02.02) "Method of improving recognition rate using digital pen for pattern printing film" Republic of Korea Utility Model Registration No. 20-0485305 (2017.12.13) "Electronic pen for writing pattern film with dot patterns"

An object of the present invention is generally to provide an optical electronic pen technology.

In particular, an object of the present invention is to radiate light of various irradiation angles to a display panel with a constant and uniform amount of light by adopting a pen tip member to which a light scattering agent is applied to an optical electronic pen, thereby enabling electronic devices such as tablet PCs or laptop computers. A light scattering agent configured so that an optical electronic pen can be used satisfactorily and a separate structure for light scattering (e.g., a light scattering plate, a light guide plate, a light diffusion plate, etc.) is not required, so that an optical electronic pen can be manufactured slim. An optical electronic pen having a pen tip is provided.

On the other hand, the problem of the present invention is not limited to these matters, and other problems can be understood from the description of this specification.

In order to achieve the above object, an optical electronic pen having a light scattering agent pen tip according to the present invention includes a pen body member 310 forming a body of the optical electronic pen; a light scattering agent pen tip member 320 connected to one end of the pen body member 310 to form a pen tip of an optical electronic pen and having a light scattering agent formed on at least a portion thereof; an IR light emitting member 340 generating light to be irradiated to the external display panel 200; an optical fiber member 342 for guiding the light generated by the IR light emitting member 340 to the light scattering agent pen tip member 320; an optical connector member 343 optically connecting the IR light emitting member 340 and the optical fiber member 342; an IR light receiving member 360 that senses the location code 210 by receiving reflected light from the display panel 200; Electronics for controlling the turn-on or turn-off of the IR light emitting member 340 and obtaining a series of positional information on the movement of the light scattering agent pen tip member 320 on the display panel 200 from the reflected light received through the IR light receiving member 360 a pen control member 370; It may be configured to include; a wireless communication member 380 that transmits a series of location information to an external smart terminal device 400 through short-range wireless communication.

At this time, in the optical electronic pen equipped with a light scattering agent pen tip according to the present invention, the pen body member 310 is bent and disposed in a region facing the display panel 200, and the light generated by the IR light emitting member 340 is absorbed. downward light-scattering members 352 and 353 that scatter light in various directions with respect to the display panel 200; It may further include lower optical fiber members 345 and 346 for guiding the light generated by the IR light emitting member 340 to the lower light scattering members 352 and 353 .

In addition, in the optical electronic pen equipped with a light scattering agent pen tip according to the present invention, the pen body member 310 is bent and disposed in a region facing the display panel 200, and the light generated by the IR light emitting member 340 is absorbed. lower light discharge members 347 and 348 radiating downward toward the display panel 200; It may further include lower optical fiber members 345 and 346 for guiding the light generated by the IR light emitting member 340 to the lower light ejection members 347 and 348 .

Meanwhile, the optical electronic pen having the light scattering agent pen tip according to the present invention includes a pen body member 310 forming a body of the optical electronic pen; a light scattering agent pen tip member 320 connected to one end of the pen body member 310 to form a pen tip of an optical electronic pen and having a light scattering agent formed on at least a portion thereof; An IR light emitting member 340 disposed to be recessed into the light scattering agent pen tip member 320 to generate light to be irradiated to the external display panel 200; an IR light receiving member 360 that senses the location code 210 by receiving reflected light from the display panel 200; Electronics for controlling the turn-on or turn-off of the IR light emitting member 340 and obtaining a series of positional information on the movement of the light scattering agent pen tip member 320 on the display panel 200 from the reflected light received through the IR light receiving member 360 a pen control member 370; It may be configured to include; a wireless communication member 380 that transmits a series of location information to an external smart terminal device 400 through short-range wireless communication.

Meanwhile, in the present invention, the light scattering agent pen tip member 320 may be configured by mixing light scattering materials to form a pen tip structure, or may be configured by attaching a light scattering film to the pen tip member, or may be configured by attaching a light scattering material to the pen tip member. It may be configured by coating.

According to the present invention, there is an advantage in that the optical electronic pen can be used well with a display panel having a smooth surface such as a tablet PC or a laptop computer.

In particular, according to the present invention, there is an advantage in that an optical electronic pen can be made slim.

[Figure 1] is a block diagram showing the internal configuration and operation method of a general optical electronic pen.
[Figure 2] is a block diagram showing cooperative operation between a general optical electronic pen and a smart terminal device.
[Fig. 3] is an exemplary diagram showing the use state of the optical electronic pen according to the panel material in the prior art.
[Figure 4] is a conceptual diagram of utilizing light scattering in an optical electronic pen in the present invention.
[Fig. 5] is a view showing a first embodiment of an optical electronic pen utilizing light scattering.
[Fig. 6] is a view showing a second embodiment of an optical electronic pen utilizing light scattering.
[Fig. 7] is a view showing a third embodiment of an optical electronic pen utilizing light scattering.
[Fig. 8] is a view showing a first embodiment of an optical electronic pen equipped with a light scattering agent pen tip according to the present invention.
[Fig. 9] is a view showing a second embodiment of an optical electronic pen equipped with a light scattering agent pen tip according to the present invention.
[Fig. 10] is a view showing a third embodiment of an optical electronic pen equipped with a light scattering agent pen tip according to the present invention.
[Fig. 11] is a view showing a fourth embodiment of an optical electronic pen equipped with a light scattering agent pen tip according to the present invention.
[Fig. 12] is a view showing a comparison between an LED light source and a VCSEL light source in the present invention.
[Fig. 13] is a diagram showing a configuration for optically connecting a light source and an optical fiber in the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings.

In describing the present invention, detailed descriptions of portions overlapping with those of the prior art optical electronic pen 10 may be omitted.

4 is a conceptual diagram of utilizing light scattering in an optical electronic pen in the present invention. Referring to FIG. 4 , the optical electronic pen 100 includes a pen tip member 120, an IR light emitting member 140, an IR light scattering member 150, and an IR light receiving member 160.

The IR light scattering member 150 irregularly scatters light (eg, IR light) emitted from the IR light emitting member 140 in various directions with respect to the display panel 202 . Since the smooth surface of the display panel 202 reflects light symmetrically to the incident angle, the reflected light is also formed in various directions.

As the reflected light from the display panel 202 is formed in various directions, whether the optical electronic pen 100 is used standing or tilted, a certain amount of the reflected light is the effective light receiving area of the IR light receiving member 160 (Field of View, FOV) Since it enters the inside, it is always possible to read the position code 212 of the display panel 202.

The applicant of this patent application proposed an invention utilizing light scattering in an optical electronic pen in Korean Patent Application No. 10-2022-0067914 (filing date: 2022. 6. 3), three examples of which are presented in [Figs. 7].

5 is a view showing a first embodiment of an optical electronic pen 100 previously proposed by the applicant for using light scattering.

Referring to FIG. 5, the optical electronic pen 100 according to the present invention includes a pen body member 110, a pen tip member 120, a pressure sensor member 130, an IR light emitting member 140, and an optical fiber member 142. ), an optical connector member 143, an IR light scattering member 150, an IR light receiving member 160, an electronic pen control member 170, and a wireless communication member 180. Let's look at each of these components.

The pen body member 110 forms the body of the optical electronic pen 100 and may be formed in a long bar shape so that the user can easily grip it with his hand.

The pen tip member 120 forms the pen tip of the optical electronic pen 100 and is disposed on one end of the pen body member 110 . The pen tip member 120 may be configured to slide on the upper surface of the display panel 200 according to a user's manipulation.

The pressure sensor member 130 is a component that detects an event in which the pen tip member 120 physically contacts the display panel 200 through pressure sensing. A portion of the pressure sensor member 130 that comes into contact with the rear end of the pen tip member 120 is preferably formed in a recessed round shape to match the rear end of the pen tip member 120 while gripping. By this recessed rounding process, even when the user uses the pen body member 110 in a tilted state, the pressure sensor member 130 comes into good contact with the rear end of the pen tip member 120, and thus the pen tip member 120 ) can be transmitted to the pressure sensor member 130 well. Here, it is preferable that the rear end of the pen tip member 120 in contact with the recessed portion of the pressure sensor member 130 also protrudes roundly. The sensor support member 131 corresponds to the shape of the pressure sensor member 130 and is a component that supports the pressure sensor member 130 from the rear so as to keep it connected to the pen body member 110 in a good state. The tension member 132 is a component that provides restoring force to the pen tip member 120 so that the pen tip member 120 protrudes inside and outside the pen body member 110, and may be composed of, for example, a spring.

The IR light emitting member 140 is a component that generates light (eg, IR light) to be irradiated onto the display panel 200 .

The optical fiber member 142 is a component that is disposed in the longitudinal direction along the pen body member 110 and guides the light generated from the IR light emitting member 140 to the IR light scattering member 150 .

The optical connector member 143 is a component that optically connects the IR light emitting member 140 and the optical fiber member 142 to each other.

The IR light scattering member 150 is a component that irregularly scatters the light generated by the IR light emitting member 140 in various directions with respect to the display panel 200 . The IR light scattering member 150 is disposed so as to direct the display panel 200 and is formed in the form of a single package with the pen tip member 120 and moves up and down integrally. At this time, a configuration in which the optical fiber member 142 guides the light to the rear surface of the IR light scattering member 150 so that the light is scattered while passing through the IR light scattering member 150 is also possible. A configuration in which the light is scattered while being reflected by the IR light scattering member 150 by guiding the light to the front of the ) is also possible. The IR light scattering member 150 is preferably disposed obliquely with respect to the longitudinal direction of the pen tip member 120. For installation of the IR light scattering member 150, the end of the pen tip member 120 may be formed bent as shown in FIG. 5.

The IR light receiving member 160 is a component that senses the position code 210 of the display panel 200 by receiving the reflected light coming into its effective light receiving area (Field of View, FOV). The IR light receiving member 160 may include an IR filter member 161, a CMOS optical member 162, and an IR sensor member 163. As described above with reference to [Fig. 4], regardless of whether the electronic pen 100 is used upright or tilted, the reflected light from the display panel 200 is incident into the FOV of the IR light receiving member 160, and accordingly, the position code ( 210) can be read.

The electronic pen controller 170 performs overall operation control of the optical electronic pen 100 in the present invention. For example, it may be recognized that the pen tip member 120 is moving on the display panel 200 based on pressure information transmitted from the pressure sensor member 130 . In addition, the electronic pen controller 170 controls the turn-on of the IR light emitting member 140 based on the pressure information or other criteria. Then, the electronic pen control unit 170 receives a series of location information (coordinate information) of the movement of the pen tip member 120 on the display panel 200 based on the location code 212 read by the IR light receiving member 160. Acquired and transmitted to the wireless communication member (180).

The wireless communication member 180 transmits the location information provided from the electronic pen control member 170 to the external smart terminal device 400 through short-range wireless communication (eg, Bluetooth).

6 is a view showing a second embodiment of an optical electronic pen 100 previously proposed by the applicant for using light scattering. Compared to the first embodiment of [Fig. 5], in the second embodiment of [Fig. 6], the optical electronic pen 100 includes a side light scattering member 151 and a downward light scattering member 152, 153 as IR light scattering members. and a side optical fiber member 144 and downward optical fiber members 145 and 146 as optical fiber members.

The side light scattering member 151 is formed in the form of a single package with the pen tip member 120 and is disposed to direct the display panel 200, and the light generated by the IR light emitting member 140 is directed toward the display panel 200 in various directions. It is a scattering component. The downward light-scattering members 152 and 153 are disposed at portions where the pen body member 110 is bent and face the display panel 200, and the light generated by the IR light emitting member 140 is directed toward the display panel 200. A component that scatters in multiple directions.

At this time, the side light-scattering members 151 are disposed obliquely to direct the display panel 200, and the downward light-scattering members 152 and 153 are preferably disposed to face the display panel 200 in front.

The side light scattering member 151 is configured to secure the amount of reflected light transmitted to the FOV of the IR light receiving member 160 when the user uses the optical electronic pen 100 by tilting it at an angle to the display panel 200 having a smooth surface. to be. However, in the configuration in which light is irradiated only through the side light scattering member 151 as shown in [FIG. 5], when the user uses the optical electronic pen 100 standing upright on the display panel 200 having a smooth surface, the IR light receiving member ( 160) has a disadvantage in that it is difficult to secure the amount of reflected light transmitted to the FOV. Considering this point, in the second embodiment, the lower light scattering members 152 and 153 are disposed so that when the user uses the optical electronic pen 100 standing upright on the display panel 200 having a smooth surface, the IR light receiving member 160 It was configured to secure the amount of reflected light delivered to the FOV of

The side optical fiber member 144 and the lower optical fiber members 145 and 146 guide the light generated by the IR light emitting member 140 to the side light scattering member 151 and the lower light scattering members 152 and 153, respectively.

The optical connector member 143 is a component that optically connects the IR light emitting member 140, the side optical fiber member 144, and the downward optical fiber members 145 and 146.

7 is a view showing a third embodiment of an optical electronic pen 100 previously proposed by the applicant for using light scattering. Compared to the second embodiment of [Fig. 6], in the third embodiment of [Fig. 7], the optical electronic pen 100 includes lower light ejection members 147 and 148 instead of lower light scattering members 152 and 153. .

The lower light emission members 147 and 148 are disposed at portions where the pen body member 110 is bent and face the display panel 200, and the light generated by the IR light emitting member 140 is directed downward toward the display panel 200. component to be investigated. It is considered that when the user uses the optical electronic pen 100 standing upright on the display panel 200 having a smooth surface, irradiating the light as it is without scattering can increase the recognition rate. At this time, the lower light discharge members 147 and 148 may be implemented as light discharge holes or may be implemented as transparent plastic.

Referring to [Fig. 5] to [Fig. 7] above, three embodiments proposed by the applicant of this patent application through Republic of Korea Patent Application No. 10-2022-0067914 have been described.

In these embodiments, as the light scattering member 150, a structure for scattering IR light generated from the IR light emitting member 140 was added to the side of the pen tip member 120. A light scattering plate, a light guide plate, a light diffusion plate, etc. can be considered as the light scattering member 150. When these structures are attached to the side of the pen tip member 120, electron The downside is that the size of the pen increases. In particular, the electronic pen becomes thick, making it difficult to grip.

Accordingly, the present invention proposes a structure capable of using a light scattering method while keeping the optical electronic pen 100 slim. In describing the present invention, descriptions of portions common to those of [FIGS. 5] to [FIG. 7] can be omitted.

8 is a view showing a first embodiment of an optical electronic pen having a light scattering agent pen tip according to the present invention.

In the present invention, a light scattering agent is applied to the pen tip member 320 of the optical electronic pen 300 and an IR light source is irradiated to the pen tip member 320. Through this, it is possible to utilize light scattering in the optical electronic pen 300 without installing a separate structure for light scattering (eg, a light scattering plate, a light guide plate, a light diffusion plate, etc.).

By applying the light scattering agent to the pen tip member 320 as such, an effect of irradiating light with a constant and uniform amount of light on the display panel 200 can be obtained. In addition, since there is no need to install a separate structure for light scattering by applying a light scattering agent to the pen tip member 320, the optical electronic pen 300 can be manufactured slim and the shape of the pen tip member 320 can be freely designed. there is. In the previous configurations shown in [Figs. 5] to [Fig. 7], there was a limitation in that the pen tip member 120 had to be designed in a shape suitable for installing the IR light scattering member 150.

The light scattering agent pen tip member 320 has a light scattering agent formed on at least a portion thereof, and the light scattering agent can be formed in various ways. Preferably, the pen tip structure may be formed by mixing light scattering materials, a light scattering film may be attached to the pen tip member, or a light scattering material may be coated on the pen tip member.

The light scattering agent may include a material capable of effectively scattering infrared (IR) light, preferably polymethyl methacrylate, polymethyl silsesquioxane, and the like.

9 to 11 are diagrams showing second to fourth embodiments of optical electronic pens equipped with light scattering agent pen tips according to the present invention.

[Figure 9] shows that in the first embodiment of [Figure 8], the IR light emitting member 340 is embedded into the light scattering agent pen tip member 320, and thus the optical fiber member 342 and the optical connector member 343 are disposed. ) is removed. According to the configuration of [Fig. 9], the pen tip member 320 itself can serve as a light source.

10 is a form in which lower light scattering members 352 and 353 are further provided for IR light scattering and lower optical fiber members 345 and 346 are further provided for light guides in the first embodiment of FIG. 8 . The design intent of [FIG. 10] is as described above with reference to [FIG. 6].

[Fig. 11] shows a form in which lower light discharge members 347 and 348 are provided instead of the lower light scattering members 352 and 353 in the third embodiment of [Fig. 10]. The design intention of [FIG. 11] is as described above with reference to [FIG. 7].

Hereinafter, the IR light emitting member 340 and the optical connector member 343 will be described with reference to [FIG. 12] and [FIG. 13]. The optical connector member 343 is an element that optically connects the IR light emitting member 340 and the optical fiber members 342 , 344 , 345 , and 346 .

12 is a view showing a comparison between an LED light source 340a and a VCSEL light source 340b that can be adopted as the IR light emitting member 340 in the present invention.

[Fig. 12] (a) is an exemplary view of using the LED light emitting member 340a as the IR light emitting member 340. The IR LED light source 340a has a wide irradiation angle and transmits light to the optical fiber member 342. During the process, light loss occurs.

[Fig. 12] (b) is an exemplary view using a VCSEL light emitting member 340b as the IR light emitting member 340. VCSEL (Vertical-Cavity Surface-Emitting Laser) is a semiconductor laser diode device that emits laser in a direction perpendicular to the upper surface. Since the irradiation angle of the VCSEL light source 340b is concentrated, light can be focused into the optical fiber core of the optical fiber member 342 .

[Figure 13] is a view showing a configuration for optically connecting the IR light emitting member 340 and the optical fiber members 342, 344, 345, 346 through the optical connector member 343 in the present invention.

[Fig. 13] (a) is an exemplary view of connecting an LED light emitting member 340a and an optical fiber member 342 by a mirror connector 343a. The LED light source 340a has a wide irradiation angle, so that the LED light 340c is wider than the optical fiber member 342. Accordingly, the mirror connector 343a is formed to enclose the LED light emitting member 340a and the optical fiber member 342 so that light can be transmitted to the optical fiber member 342.

[Fig. 13] (b) is an exemplary view of connecting the VCSEL light emitting member 340b and the optical fiber member 342 by the optical fusion member 343b. Since the VCSEL light source 340b has good linearity and a concentrated irradiation angle, the VCSEL light 340d can be focused and irradiated into the optical fiber core of the optical fiber member 342 . Here, the VCSEL light emitting member 340b and the optical fiber member 342 were directly connected by optical fusion without an intermediate connecting member. Light fusion splicing is a technology that combines two optical materials using arc discharge heat, and the light loss rate by light fusion is less than 0.1 dB.

In the mirror connector 343a method of (a) of FIG. 13, an air gap is formed according to the coupling structure to generate reflection noise, which inevitably results in loss of light quantity to some extent. On the other hand, in [FIG. 13] (b), the VCSEL light source 340b focuses and irradiates the light 340d into the optical fiber core of the optical fiber member 342, and the VCSEL light source 340b and the optical fiber member are radiated by the optical fusion member 343b. (342) is directly coupled, so the amount of light loss is very small.

[Fig. 13] (c) is an exemplary view of connecting a VCSEL light emitting member 340b and a plurality of optical fiber members 342, 344, 345, and 346 by an optical fusion member 343b. In this case, the plurality of lights 340d of the IR light emitting member 340 are individually incorporated into the corresponding optical fiber cores of the side optical fiber member 344 and the lower optical fiber members 345 and 346 by the optical fusion member 343b. This may be configured to optically connect the IR light emitting member 340 and the optical fiber member 342 to each other. However, [Fig. 13] (c) is presented as an example, and other types of embodiments are also possible. For the performance of the optical electronic pen 100, it is important that the light generated by the IR light emitting member 340 is not lost in an intermediate process.

The present invention can be applied to such various light sources (eg LED light source, VCSEL light source, micro LED light source, Chip LED light source, etc.), and is applied to various methods (eg mirror connector, optical fusion, etc.) connecting light sources and optical fibers. can do.

On the other hand, the present invention can be implemented in the form of computer readable codes on a computer readable non-volatile recording medium. Various types of storage devices exist as such non-volatile recording media, such as hard disks, SSDs, CD-ROMs, NAS, magnetic tapes, web disks, cloud disks, and the like. Also, the present invention may be implemented in a form in which codes are distributedly stored and executed in a plurality of storage devices connected through a network. In addition, the present invention may be implemented in the form of a computer program stored in a medium in order to execute a specific procedure in combination with hardware.

Claims (7)

delete delete delete a pen body member 310 forming a body of an optical electronic pen;
an IR light emitting member 340 generating IR light to be irradiated to the external display panel 200;
It is connected to one end of the pen body member 310 to form a pen tip of an optical electronic pen, and is configured by mixing a light scattering material that scatters infrared (IR) light to form a pen tip structure, and the IR light emitting member 340 A light scattering agent pen tip member 320 configured to irregularly scatter IR light generated by the IR light emitting member 340 in various directions by embedding it into the display panel 200;
an IR light receiving member 360 that senses the location code 210 by receiving reflected light from the display panel 200;
Turning on or off the IR light emitting member 340 and controlling a series of location information of the movement of the light scattering agent pen tip member 320 on the display panel 200 from the reflected light received through the IR light receiving member 360 Acquiring electronic pen control element 370;
A wireless communication member 380 that transmits the series of location information to an external smart terminal device 400 through short-range wireless communication;
An optical electronic pen having a light scattering agent pen tip comprising:
The method of claim 4,
The optical electronic pen with a light scattering agent pen tip, characterized in that the light scattering material comprises at least a part of polymethyl methacrylate and polymethyl silsesquioxane. delete delete

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