KR100962651B1 - Light pen and light-sensitive liquid crystal display system having the same - Google Patents

Light pen and light-sensitive liquid crystal display system having the same Download PDF

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Publication number
KR100962651B1
KR100962651B1 KR20030062501A KR20030062501A KR100962651B1 KR 100962651 B1 KR100962651 B1 KR 100962651B1 KR 20030062501 A KR20030062501 A KR 20030062501A KR 20030062501 A KR20030062501 A KR 20030062501A KR 100962651 B1 KR100962651 B1 KR 100962651B1
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South Korea
Prior art keywords
light
sensing
image
liquid crystal
crystal display
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KR20030062501A
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Korean (ko)
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KR20050025697A (en
Inventor
김형걸
박상진
어기한
정영배
조종환
최영준
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삼성전자주식회사
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Priority to KR20030062501A priority Critical patent/KR100962651B1/en
Priority claimed from US10/846,043 external-priority patent/US7649527B2/en
Publication of KR20050025697A publication Critical patent/KR20050025697A/en
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Publication of KR100962651B1 publication Critical patent/KR100962651B1/en

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Abstract

Disclosed are a light pen and a photosensitive liquid crystal display system having the same. A part of the image light generated from the outside is intercepted to generate sensing light, and the image is reconstructed using the sensing light. Since the composition of the image can be changed without consuming the electrical energy to generate the sensing light, the power consumption of the light pen can be greatly reduced. Alternatively, when the light amount of the image light generated from the outside is small, the light amount of the image light is detected, and when the light amount of the image light is smaller than the preset light amount, electric energy is consumed from the inside of the light pen to generate sensing light to reconstruct the image. By simplifying the configuration of the light pen, the weight and volume of the light pen can be greatly reduced, and the configuration of the image can be changed even if the amount of light of the image light is low.
Light Pen, Light Sensing Liquid Crystal Display System

Description

LIGHT PEN AND LIGHT-SENSITIVE LIQUID CRYSTAL DISPLAY SYSTEM HAVING THE SAME}

1 is a conceptual diagram of a light pen according to a first embodiment of the present invention.

2 is a conceptual diagram of a light pen according to a second embodiment of the present invention.

3 is a conceptual diagram of a light pen according to a third embodiment of the present invention.

4 is a conceptual diagram of a light pen according to a fourth embodiment of the present invention.

5 is a conceptual diagram of a light pen according to a fifth embodiment of the present invention.

6 is a conceptual diagram illustrating a light sensing liquid crystal display system according to a sixth embodiment of the present invention.

FIG. 7 is a conceptual diagram illustrating the first substrate shown in FIG. 6.

8 is a conceptual diagram of the photosensitive device shown in FIG. 6.

9 is a conceptual diagram illustrating the driving module illustrated in FIG. 6.

10 is a conceptual diagram illustrating a light sensing liquid crystal display system according to a seventh embodiment of the present invention.

The present invention relates to a light pen and a light sensing liquid crystal display system having the same, and more particularly, to a light pen and a light sensing liquid crystal display system having the same that allow a user to directly input information to a display device.

In general, a display device receives an electrical signal from an information processing device and converts the signal into an image. In other words, the conventional display device and the information processing device were only capable of one-way communication. Therefore, the operator needs a separate data input device, for example, a keyboard, a keypad, a mouse, or the like, to input new information into the information processing device.

Some of the recently developed display apparatuses have a function of reconstructing an image by outputting data input by an operator to a screen on which an image is displayed to an information processing apparatus. In other words, this means that the bidirectional communication between the display device and the information processing device is enabled.

For bidirectional communication between the display device and the information processing device, the conventional display device further includes a touch screen panel. The touch screen panel recognizes the pressure applied by the operator's hand or touch pen and outputs the position data to the information processing apparatus. The information processing apparatus processes the position data input from the display apparatus to output a new image signal to the display apparatus, and the display apparatus displays the new image corresponding to the image signal.

However, the display device has another problem that the thickness and weight of the display device are greatly increased. In addition, a display device using a touch panel has a problem that is not suitable for expressing a precise character or a picture.

Recently, a display device that detects light input by an operator and bidirectionally communicates with an information processing device has been developed. Such a display device has a built-in light sensor having a fine size and arranged in a matrix form.

The light sensor outputs a signal that can be recognized by the information processing apparatus by the light input by the operator, and the output signal is transmitted to the information processing apparatus. The information processing apparatus outputs a new image signal to the display apparatus in response to the signal input from the display apparatus, and the display apparatus displays the new image by the image signal.

On the other hand, a light pen is required to apply light to a display device having a light sensing sensor. Recently developed light pens generate light by applying a constant pressure to the surface of the display device.

Such a conventional light pen has an advantage of greatly reducing the power consumption of the light pen by generating light only when an operator presses the light pen on the display device. On the other hand, in order to generate light from the conventional light pen, the operator must apply pressure to the display device through the light pen, thereby increasing the fatigue of the worker.

In addition, the conventional light pen may damage the surface of the display device by applying pressure to the surface of the display device. In addition, the conventional light pen has a problem in that the production cost is excessively increased and the weight and volume are greatly increased because the light pen has a complex configuration such as a lens to improve brightness.

Accordingly, the present invention has been made in view of such a conventional problem, and the first object of the present invention is to provide a simple configuration by inputting information to the display device using a part of the image light generated in the display device, and greatly reduce the weight and volume and A light pen for reducing surface damage of a display device is provided.

In addition, a second object of the present invention to provide a light-sensitive liquid crystal display system using the light pen.

In order to implement the first object of the present invention, the present invention provides a light pen disposed on the body and the body, and includes a light conversion unit for intercepting a part of the image light incident from the outside and converting the light into first sensing light. .

In addition, in order to implement the second object of the present invention, the present invention is disposed on the liquid crystal display, the body and the body for emitting the first image light using the liquid crystal to convert a portion of the first image light incident from the outside into the sensing light. A light pen including a light conversion unit and a liquid crystal array may be changed by a light detection unit and a detection signal disposed for each of the plurality of first electrodes to detect a sensing light and output a detection signal including incident position information of the sensing light. A photosensitive liquid crystal display system comprising a driving module for generating a second image light is provided.

According to the present invention, a part of the image light emitted from the display device is intercepted and scanned by an optical sensing element disposed inside the table to obtain a signal necessary for reconstructing an image from the optical sensing element, thereby greatly increasing the components of the light pen. Reduce the weight and volume significantly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Embodiments of the light pen

Example 1

1 is a conceptual diagram of a light pen according to a first embodiment of the present invention.

Referring to FIG. 1, the light pen 300 includes a body 100 and a light converter 200.

The light converter 200 has a disc shape and is disposed on the body 100. In the present embodiment, the light conversion unit 200 is disposed at the end of the body 100 having a tip shape. The light converter 200 converts the image light 200a into the first sensing light 200b. The image light 200a is generated from a display device (not shown) and is incident to the light converter 200. The first sensing light 200b is emitted from the light converter 200 toward the display device. In this case, the first sensing light 200b is generated by intercepting a part of the image light 200a, and the first sensing light 200b and the image light 200a have different directions.

In order to generate the first sensing light 200b, the light converter 200 reflects and intercepts a part of the image light 200a.                     

The light converter 200 is made of a metal having high light reflectance, for example, aluminum or an aluminum alloy, to intercept the first sensing light 200b from the image light 200a.

The body 100 has a pen shape. In the present embodiment, the body 100 fixes the light conversion unit 200. The body 100 may be manufactured in a wide variety of shapes according to the user's taste and use. In this embodiment, in order to further reduce the volume and weight of the body 100, the body 100 has an empty space 110 therein, the light conversion unit 200 is fixed to the end of the body 100.

According to the present exemplary embodiment, the light pen 300 intercepts a part of the image light 200a to generate the first sensing light 200b. The light pen 300 according to the present embodiment consumes energy to generate the first sensing light 200b. There is no need to generate the sensing light 200b. Therefore, the number of components of the light pen 300 can be greatly reduced, and the volume and weight of the light pen 300 can also be reduced.

Second embodiment

2 is a conceptual diagram of a light pen according to a second embodiment of the present invention. The light pen according to the second embodiment of the present invention is the same as the light pen of Example 1 except for the structure of the light conversion part of the first embodiment. Therefore, the same members are denoted by the same reference numerals as those in the first embodiment, and duplicated descriptions thereof will be omitted.

Referring to FIG. 2, the surface on which the image light 200a is incident in the light conversion unit 210 further includes a recessed recess part 215. The recess 215 condenses the first sensing light 200b generated by the light converter 210 in a small area.

The light conversion unit 210 according to the present embodiment may be made of aluminum or an aluminum alloy, or made of synthetic resin, or the like, and then may coat a metal thin film on the entire surface of the light conversion unit 210 or the recess 215. It is possible to manufacture.

According to the present exemplary embodiment, the recess 215 is formed on the surface of the light conversion unit 210 so that the first sensing light 200b generated by the light conversion unit 210 can reach the small area intensively. Thereby further improving the quality of the light pen 300.

Third Embodiment

3 is a conceptual diagram of a light pen according to a third embodiment of the present invention. The light pen according to the third embodiment of the present invention is the same as the light pen of the first embodiment except that the scratch prevention unit is installed in the light conversion unit of the first embodiment. Therefore, the same members are denoted by the same reference numerals as those in the first embodiment, and duplicated descriptions thereof will be omitted.

Referring to FIG. 3, the surface of the light conversion unit 220 further includes a scratch prevention unit 225. The scratch prevention unit 225 prevents the contact surface that the light conversion unit 220 contacts from being scratched by the light conversion unit 220. In order to realize this, the scratch prevention part 225 is disposed on the surface of the light conversion part 220, and the part of the scratch prevention part 250 which contacts the contact surface is rounded. In the present embodiment, the portion of the scratch prevention portion 225 in contact with the contact surface has a hemispherical shape.

According to the present exemplary embodiment, a scratch prevention unit 225 is further installed in the light conversion unit 220 that intercepts a part of the image light 200a to generate the first sensing light 200b, thereby providing the light conversion unit 220 with a scratch prevention unit 225. This prevents the contact surface from being scratched and damaged.

Example 4

4 is a conceptual diagram of a light pen according to a fourth embodiment of the present invention. The light pen according to the fourth embodiment of the present invention is the same as the light pen of Example 1 except for the structure of the light converting portion of the first embodiment. Therefore, the same members are denoted by the same reference numerals as those in the first embodiment, and duplicated descriptions thereof will be omitted.

4, the surface of the light converter 230 further includes an egg reflector 235. The egg reflector 235 variously changes the direction of the first sensing light 200b generated from the light converter 230 within a small area. In the present embodiment, the egg reflector 235 is a plurality of irregularities. The egg reflector 235 prevents the light sensing from being precisely performed by the angle of the operator holding the light pen 300 toward the direction in which the first sensing light 200b is not intended.

According to the present invention, an egg reflector 235 is further formed on the surface of the light converter 230 to diffusely reflect the first sensing light 200b so that the first sensing light 200b is directed in an unintended direction. To prevent them.

Example 5

5 is a conceptual diagram of a light pen according to a fifth embodiment of the present invention.

Referring to FIG. 5, the light pen 300 includes a body 100, a light converter 240, a light generating module 242, and a detector 244.

The body 100 includes an empty space 110 therein, and an opening 105 is formed at a portion of the body 100 facing the light generating module 242.

The light conversion unit 240 is disposed in the body 100. The light converter 240 converts the image light 200a into the first sensing light 200b. The light conversion unit 240 has a through hole 243 formed at a portion corresponding to the opening 105 formed in the body 100.

The light generating module 242 and the detector 255 are disposed in the empty space 110 formed inside the body 100.

The light generation module 242 includes a light source 242a, a control unit 242b, a power supply 242c, and a switch 242d. In this embodiment, the light source 242a is a light emitting diode (LED) having a small size and high luminance. The second sensing light 200c is emitted from the light source 242a. The power supply 242c provides a power source for generating the second sensing light 200c to the light source 242a. The control unit 242b controls the turning on and off of the light source 242a.

The detector 244 is disposed in the inner empty space 110 of the body 100 and is connected to the control unit 242b to transmit a detecting signal to the control unit 242b. The detector 244 converts the light amount of the image light 200a into a digital signal. In the present embodiment, the detector 244 is a photo transistor or a photo diode.

The detector 244 periodically detects the light amount of the image light 200a and outputs a detection signal to the control unit 242b. The detecting signal includes information associated with the amount of light of the image light 200a.

The control unit 242b compares the detecting signal of the detector 244 with a preset reference signal. If the light amount of the image light 200a is lower than the designated light amount, the control unit 242b applies power to the light source 242a from the power supply 242c to generate the second sensing light 200c from the light source 242a. Let's do it. The second sensing light 200c is emitted through the through hole 243 of the light converter 240.

In this way, the second sensing light 200c is generated in response to the light amount of the image light 200a. When the light amount of the image light 200a is small, the light amount of the first sensing light 200b generated by the light conversion unit 240 is small. Because it is small.

Unexplained reference numeral 242d is a switch for always turning on or always turning off the light source 242a.

According to the present exemplary embodiment, when the amount of light of the image light 200a is insufficient and the amount of light of the first sensing light 200b is insufficient, the inside of the body 100 of the light pen 300 is directed toward the outside of the body 100. By generating the second sensing light 200c, the light pen 300 smoothly operates in a normally black mode liquid crystal display device using, for example, a vertical alignment mode liquid crystal. Allow it to work.

Optical Sensing Liquid Crystal Display System

Example 6

6 is a conceptual diagram illustrating a light sensing liquid crystal display system according to a sixth embodiment of the present invention.

Referring to FIG. 6, the light sensing liquid crystal display system 600 includes a light pen 300, a liquid crystal display panel 400, and a driving module 500.

Since the light pen 300 has been described in detail in the first to fifth embodiments of the light pen, a duplicate description thereof will be omitted. The light pen 300 may use any of the light pens described in Embodiments 1 to 5, and in this embodiment, the light pen 300 shown in Embodiment 1 is applied.

The liquid crystal display panel 400 includes a first substrate 410, a second substrate 420, a liquid crystal 430, a first electrode 440, a second electrode 450, and a photosensitive device 460.

The first substrate 410 and the second substrate 420 are disposed to face each other, and the first substrate 410 and the second substrate 420 are transparent glass substrates. In the state where the first substrate 410 and the second substrate 420 are disposed to face each other, a sealing member 470 for arranging the liquid crystal 430 is formed at the edge of the first substrate 410 and the second substrate 420. Is placed.

The liquid crystal 430 is interposed between the first substrate 410 and the second substrate 420. The liquid crystal 430 has optical characteristics that change the light transmittance of light passing through the liquid crystal 430 in response to the arrangement and the electrical characteristics of which the arrangement is changed by the electric field.                     

In order to change the light transmittance of the light passing through the liquid crystal 430, the first electrode 440 is disposed on the first substrate 410, and the second electrode 450 is disposed on the second substrate 420.

FIG. 7 is a conceptual diagram illustrating the first substrate shown in FIG. 6.

6 and 7, a plurality of first electrodes 440 are formed on the first substrate 410. In the present exemplary embodiment, 1024 × 768 × 3 first electrodes 440 are formed on the first substrate 410 in a matrix form. The first electrodes 440 are made of indium tin oxide (ITO) or indium zinc oxide (IZO), which are transparent and conductive.

A first thin film transistor 470 is applied to each of the first electrodes 440 formed on the first substrate 410 to apply a pixel voltage at a predetermined timing.

The first thin film transistor 470 includes a gate electrode G, a source electrode S, a channel layer C, and a drain electrode D. The drain electrode D of the first thin film transistor 470 is connected to the first electrode 440. The gate electrode G of the first thin film transistors belonging to each row of the first thin film transistors 470 is connected to the gate line 475 in common, and the first thin film belonging to each column of the first thin film transistors 470. Transistors are commonly connected to data line 480.

Referring to FIG. 6 again, the second electrode 450 is formed on a surface of the second substrate 420 facing the first electrodes 440. The second electrode 450 is formed over the entire surface of the second substrate 420. The second electrode 450 is made of an indium tin oxide thin film (ITO) or an indium zinc oxide thin film (IZO) that is transparent and conductive. The common voltage is applied to the second electrode 450.

The color filters 425 facing the first electrodes 440 are disposed between the second electrode 450 and the second substrate 420. The color filters 425 include a red color filter 425a through which light of a red wavelength passes, a green color filter 425b through a light of a green wavelength, and a blue color filter 425c through a light of a blue wavelength.

8 is a conceptual diagram of the photosensitive device shown in FIG. 6.

6 and 8, the photosensitive device 460 includes a second thin film transistor 462, a third thin film transistor 464, and first and second sensor lines 466 and 468.

The first sensing light 200b obtained by intercepting a part of the image light generated through the first electrode 440, the liquid crystal 430, and the second electrode 450 by the light pen 300 is the liquid crystal display panel 400. It is provided as a light sensing element 460 embedded in). The second thin film transistor 462 is driven in response to the first sensing light 200b. When the second thin film transistor 462 is driven, the first signal provided to the source electrode S1 of the second thin film transistor 462 through the data line 280 is the drain electrode D1 of the second thin film transistor 462. Is output. Here, the first signal includes image information and is a data driving voltage applied to the pixel electrode through the first thin film transistor 470.

Thereafter, in the state where the third thin film transistor 464 is driven by the second signal provided to the gate line G2, the first signal output from the drain electrode D1 of the second thin film transistor 462 is a third thin film. The source electrode S2 of the transistor 464 is provided. Therefore, the first signal is output to the drain electrode D2 of the third thin film transistor 464. Here, the second signal is a gate driving voltage applied to the gate electrode of the first thin film transistor 470.

9 is a conceptual diagram illustrating the driving module illustrated in FIG. 6.

The first signal is applied to the detection signal processing unit 510 shown in FIG. 9, and the detection signal processing unit 510 generates position data into which light is input by the first signal. The position data is applied to the driving module 500 again.

Referring to FIG. 9 again, the driving module 500 generates a gray voltage connected to the gate driver 520, the data driver 530, the driving voltage generator 540 connected to the gate driver 520, and the data driver 530. A light source controller 565 connected to the unit 550, the backlight assembly 560 for supplying light to control the backlight assembly 560, and a sensing signal processor 510 for processing a first signal generated from the light sensing element 460. ) And a signal controller 570 for controlling them.

The gate driver 520 is connected to each gate line 475. The gate driver 520 applies a gate driving signal generated from the driving voltage generator 540 to the gate line 475. The gate driving signal includes a gate turn-on signal Von, a gate turn-off signal Voff, and a common voltage Vcom.

The data driver 530 is connected to each data line 480. The data driver 530 selects a gray voltage generated from the gray voltage generator 550 and applies it to the data line 480.

The signal controller 570 controls the gate driver 520, the driving voltage generator 540, the data driver 530, and the gray voltage generator 550. The signal controller 570 receives a video signal from the external information processing device 580. The video signal may include a first red gradation signal R 1 , a first green gradation signal G 1 , a first blue gradation signal B 1 , a vertical synchronizing signal V sync , and a horizontal synchronization signal. synchronizing signal, H sync , main clock signal (CLK), data enable signal (DE), and the like.

The signal controller 570 converts the first red gray level signal R 1 , the first green gray level signal G 1 , and the first blue gray level signal B 1 included in the video signal to convert the second red gray level signal R. 2 ), the second green gradation signal G 2 and the second blue gradation signal B 2 are generated. The second red gray level signal R 2 , the second green gray level signal G 2 , and the second blue gray level signal B 2 generated by the signal controller 570 are output to the data driver 530.

Meanwhile, the signal controller 570 outputs a data control signal to the data driver 530 together with the second red gray signal R 2 , the second green gray signal G 2 , and the second blue gray signal B 2 . do. The data control signal is a horizontal synchronization indicating the start of input of the second red gradation signal R 2 , the second green gradation signal G 2 , and the second blue gradation signal B 2 from the first data line to the last data line. It includes a horizontal synchronization start signal, a load signal for indicating the application of the gray level voltage to each data line 480, a data clock signal and the like.

In addition, the signal controller 570 outputs a gate control signal to the gate driver 520. The gate control signal includes a vertical synchronization start signal (STV) for indicating the start of output of the gate-on pulse signal, which is a high period of the gate signal pulse, and a gate clock signal for controlling the output timing of the gate-on pulse. (CPV), a gate-on enable signal for controlling the pulse width of the gate-on pulse to continuously apply the gate-on pulse from one channel defined as a group of about 256 gate lines 475 to an adjacent channel. on enable signal (OE)). The gate on enable signal and the gate clock signal are supplied to the driving voltage generator 540.

In operation, the data driver 530 transmits a second red gradation signal R 2 , a second green gradation signal G 2 , and a second blue gradation signal B to each data line 480 in response to the data control signal. The analog voltage corresponding to 2 ) is applied from the gray voltage generator 550 to be output. The gate driver 520 turns on all the first thin film transistors 470 connected to the gate line by applying a gate-on pulse to the first gate line according to the data control signal from the signal controller 570. Accordingly, the driving voltage is increased from the drain electrode D of the first thin film transistor 470 connected to the data line 480 crossing the gate line 475 to which the gate on pulse is applied. Is approved. The signal controller 570 repeats this process for a limited time of one frame.

Referring to FIG. 6, after one frame has elapsed, pixel voltages are applied to all the first electrodes 440 of the first substrate 410, and the liquid crystal 430 has the pixel voltage and the second substrate 420. Are arranged by a common voltage applied to the second electrode 450.

6 and 9, the backlight assembly 560 is disposed to face the first substrate 410 to generate light, and the image light 200a is generated while the light passes through the liquid crystal 430. The image light 200a passes through the second substrate 420 and is incident to the eyes of the worker.

On the other hand, in order to control the image generated by the image light (200a), the operator using the light conversion unit 200 of the light pen 300, the light sensing element 460 disposed between the first electrode 440 The first sensing light 200b is supplied thereto.

When the first sensing light 200b generated by the light pen 300 is incident to some of the photosensitive devices 430 disposed on the first substrate 410, the first sensing light 200b is incident. A sense signal is generated from 430, and the sense signal is processed by the sense signal processing unit 510.

The processing signal processed by the sensing signal processing unit 510 is again output to the signal controller 570, and the signal controller 570 outputs the processing signal to the external information processing apparatus 580. The information processing apparatus 580 processes the processing signal input from the signal controller 570 to output a new video signal to the signal controller 570 so that a new image is displayed on the liquid crystal display panel.

Example 7

10 is a conceptual diagram illustrating a light sensing liquid crystal display system according to a seventh embodiment of the present invention. The photosensitive liquid crystal display system according to the seventh embodiment of the present invention is the same as the photosensitive liquid crystal display system of Example 6 except for the structure of the light pen of the sixth embodiment. Therefore, the same members are denoted by the same reference numerals as those in the sixth embodiment, and duplicated descriptions thereof will be omitted.

Referring to FIG. 10, when the amount of light or intensity of the image light 200a generated by the liquid crystal display panel 400 is low, the first sensing light 200b generated by being reflected by the light conversion unit 240 of the light pen 300 may be used. ), The amount of light is very small, the light sensing device 430 may not operate.

In view of such a problem, when the amount of light or the intensity of the image light 200a generated in the liquid crystal display panel 400 is low, a detection signal emitted from the detector 244 disposed inside the light pen 300 is detected. The control unit 242b supplies power to the lamp 242a from the power supply 242c disposed inside the light pen 300 to generate the second sensing light 200c from the lamp 242c. The second sensing light 200c is applied to the photosensitive device 430, so that the photosensitive device 430 operates normally even if the light amount of the first sensing light 200b is low.

 As described above in detail, by interrupting a part of the image light to form the sensing light to control the light sensing element formed on the liquid crystal display panel, the light pen does not directly generate the sensing light so that the information is transmitted to the light sensing element of the liquid crystal display panel. Has the advantage of providing.

In the detailed description of the present invention described above with reference to a preferred embodiment of the present invention, those skilled in the art or those skilled in the art having ordinary knowledge in the scope of the invention described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (15)

  1. In a light pen used in a liquid crystal display system having a liquid crystal display unit,
    Body; And
    And a light converting part disposed on the body and converting a part of the image light emitted from the liquid crystal display part into the first sensing light.
  2. The light pen as claimed in claim 1, wherein the light conversion unit is disposed at an end of the body to reflect a portion of the image light to generate the first sensing light.
  3. The light pen according to claim 1, wherein the surface of the light converting portion further comprises a recessed concave portion for collecting the image light.
  4. The light pen according to claim 1, wherein the surface of the light conversion part further comprises a scratch prevention part having a convex shape to prevent scratches of the light conversion part and a contact surface in contact with the light conversion part.
  5. The light pen according to claim 4, wherein the scratch prevention part has a hemispherical shape.
  6. The light pen according to claim 1, wherein the surface of the light conversion unit further comprises an egg reflector for diffusely reflecting the image light.
  7. The light pen according to claim 6, wherein the egg reflector is formed of a plurality of irregularities.
  8. According to claim 1, wherein the body further comprises a light generating module for generating light and a detector for detecting the amount of light of the image light, the light conversion unit for supplying the image light to the detector and the amount of light of the image light reference The light pen further comprising a through hole for emitting the second sensing light when the amount of light is less than or equal to the amount of light.
  9. The light pen according to claim 8, wherein the light generating module includes a light emitting diode for generating the light, and the detector is a phototransistor or a photodiode for sensing the image light.
  10. A liquid crystal display which emits first image light using a liquid crystal interposed between first electrodes and a second electrode facing the first electrodes;
    A light pen including a body and a light conversion unit disposed in the body to convert a portion of the first image light into sensing light;
    A light sensing unit disposed between the first electrodes to sense the sensing light and output a sensing signal including the incident position information of the sensing light; And
    And a driving module configured to generate a second image light by changing the arrangement of the liquid crystals by the detection signal.
  11. The liquid crystal display system of claim 10, wherein the light conversion unit is disposed in the body and reflects a portion of the first image light to generate the sensing light.
  12. The liquid crystal display system of claim 10, wherein the surface of the light conversion unit further comprises a non-reflective unit for diffusely reflecting the sensing light to cause the sensing light to enter the at least one light reflecting unit.
  13. The liquid crystal display system of claim 12, wherein the egg reflector comprises a plurality of irregularities.
  14. A liquid crystal display which emits first image light using a liquid crystal interposed between first electrodes and a second electrode facing the first electrodes;
    A light conversion module disposed in the body and the body to convert a part of the first image light into the first sensing light, and including a through hole, a light generating module disposed in the body to generate the second sensing light; A light pen including a detector for detecting an amount of light of the first image light;
    A light detector disposed between the first electrodes to detect the first or second sensing light and output a sensing signal including incident position information of the first sensing light or the second sensing light; And
    And a driving module configured to generate a second image light by changing the arrangement of the liquid crystals by the detection signal.
  15. The liquid crystal display of claim 14, wherein the light generating module includes a light emitting diode for generating the second sensing light, and the detector is a phototransistor or a photodiode for sensing the first image light. Display system.
KR20030062501A 2003-09-08 2003-09-08 Light pen and light-sensitive liquid crystal display system having the same KR100962651B1 (en)

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KR20030062501A KR100962651B1 (en) 2003-09-08 2003-09-08 Light pen and light-sensitive liquid crystal display system having the same

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR20030062501A KR100962651B1 (en) 2003-09-08 2003-09-08 Light pen and light-sensitive liquid crystal display system having the same
US10/846,043 US7649527B2 (en) 2003-09-08 2004-05-14 Image display system with light pen
TW093113844A TWI348857B (en) 2003-09-08 2004-05-17 Image display system with light pen
CN 200410054530 CN100595656C (en) 2003-09-08 2004-07-23 Image display system with light pen
JP2004251881A JP4692951B2 (en) 2003-09-08 2004-08-31 Light pen, display device, and display system having the same
JP2010183194A JP5194281B2 (en) 2003-09-08 2010-08-18 Line pen, display device and display system having these.

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KR20050025697A KR20050025697A (en) 2005-03-14
KR100962651B1 true KR100962651B1 (en) 2010-06-11

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Cited By (1)

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KR100995400B1 (en) 2010-06-29 2010-11-19 한진정보통신(주) System for extracting building outline using terrestrial lidar

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KR100930493B1 (en) * 2003-04-17 2009-12-09 삼성전자주식회사 A light pen and light sensing liquid crystal display device having the same

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Publication number Priority date Publication date Assignee Title
KR100995400B1 (en) 2010-06-29 2010-11-19 한진정보통신(주) System for extracting building outline using terrestrial lidar

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