KR20040049916A - Light emitting device display using afterimage effects - Google Patents

Abstract

PURPOSE: A device displaying afterimage by using LED is provided to display a user's character string by receiving desired the user's character string from an information terminal such as a personal computer, a cellular phone, and a PDA. CONSTITUTION: A device displaying afterimage by using LED includes a power supply unit, a display unit, a storage, a communication port, and a controller. The power supply unit(11) supplies the power. The display unit(12) is formed with two or more LEDs. The LEDs are arranged in line. The storage(13) stores display data. The communication port(14) is connected to an external information terminal in order to transmit or receive the data. The controller(15) receives the data from the external information terminal, stores the received data, and controls flickering states of the LEDs. The display unit displays visual shapes of the data due to afterimages in a swing state by maintaining the same flickering states within a predetermined time period.

Description

IMAGE EMITTING DEVICE DISPLAY USING AFTERIMAGE EFFECTS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an after-image display device of LED, and in particular, a plurality of light emitting devices arranged in a row by receiving text information generated by using a mobile phone or a personal computer are sequentially controlled to display the text information in space by an afterimage effect. The present invention relates to an LED afterimage display device for displaying corresponding information.

LED signboards are widely used for outdoor advertising or as an information display device for informing the current traffic conditions of subway stations, airports and bus terminals. The LED board using the LED was mostly used in the conventional seven segments, but this seven segment system can display only the alphabet and numbers can be displayed there is a problem that the information that can be expressed is limited.

Therefore, in the advertisement field, an electronic display board using an 8 * 8 dot matrix that can freely display various information is widely used.

In addition, unlike the above LED signboard, the LED afterimage display device, which has been spotlighted as a support item for various events, events, and performances, has a simple character or character due to the afterimage effect generated by sequentially controlling the flashing parallax of a plurality of LEDs arranged in a row. Since the image can be displayed, it is made small and easy to carry.

FIG. 1 is a block diagram schematically illustrating a configuration of a conventional LED afterimage display device, in which a controller 2 operating by receiving a predetermined power by a power supply unit 1 includes a plurality of character string display information stored in a memory unit 3. The display unit 5 is configured to read out one of the display units according to the selection signal of the selection button unit 4 and sequentially output the same to the display unit 5 including eight light emitting elements arranged at a predetermined interval. The synchronization unit 6 provides a constant clock signal to allow the control unit 2 to synchronize with the memory unit 3 and the display unit 5, and the reset circuit unit 7 controls the control unit according to a user's selection. Outputs a signal to initialize (2).

The conventional LED afterimage display device having such a configuration is composed of only a predetermined number of LEDs arranged in a row and a circuit that can be implemented in a small size, which can be carried casually, and can provide an interesting communication effect by displaying a predetermined character string without restriction of a place. Could.

However, these products can select and display only one of the strings pre-stored in its own memory, and the user can not input or update the string arbitrarily.

Accordingly, the present invention is to solve the above problems, by allowing the user to receive the character string to be displayed at any time from any information terminal such as a personal computer, mobile phone, PDA, so that the user can display the character string input arbitrarily An object thereof is to provide an LED afterimage display device.

1 is a block diagram schematically showing the configuration of a conventional LED afterimage display device,

2 is a block diagram schematically showing an LED afterimage display device according to the present invention;

3 is a perspective view illustrating the appearance of an LED afterimage display device according to an exemplary embodiment of the present invention;

4 is a configuration diagram of a general 8 * 8 dot matrix,

5 is an exemplary view listing sequentially arranged light emitting devices sequentially blinking according to the present invention;

FIG. 6 is a further sectional view showing sequentially arranged light emitting devices sequentially blinking according to the present invention; FIG.

7 is a view showing a state connected with the mobile phone according to an embodiment of the present invention,

8 is a diagram illustrating a state in which a personal computer is connected according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: LED afterimage display device 11: power supply

12: display unit 13: storage unit

14: communication port 15: central control unit

16 light emitting element 17 power switch

20: information terminal 21: serial cable

22: mobile phone 23: data communication port

24: keypad 25: personal computer

26: Infrared port

LED afterimage display device of the present invention for achieving the above object, a power supply for supplying power, a display unit consisting of at least two light emitting elements arranged in a row, and stores a variety of data including information to be displayed on the display unit A storage unit for linking with an external information terminal, a communication port for transmitting and receiving data, and receiving predetermined information from the information terminal connected through the communication port and storing the predetermined information in the storage unit, And a central processing unit which sequentially controls the display unit at predetermined time intervals. In particular, when the display unit is swinging in space, the display unit sequentially displays parts visually representing the data at least two or more predetermined time intervals and maintains the same flashing state within one predetermined time interval. The afterimage on is configured such that the complete visual form of the data is displayed in space.

In the LED afterimage display device of the present invention, the communication port is connected to the information terminal via a predetermined wired cable to receive data through serial communication, or the communication port is linked with the information terminal via a wireless signal. Data can be received by a predetermined protocol.

In addition, the afterimage display device according to the present invention is characterized in that the information terminal is a portable terminal provided with at least one communication port corresponding to the communication port for transmitting and receiving data. The information terminal may also be a personal computer.

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

FIG. 2 is a block diagram schematically illustrating an LED afterimage display device according to an exemplary embodiment of the present invention, a power supply unit 11 for supplying power, a display unit 12 including at least two light emitting elements arranged in a row, and the display unit A storage unit 13 for storing various data including information to be displayed by (12), a communication port 14 for linking with an external information terminal 20 to transmit and receive data, and the communication port 14 Receives predetermined information from the information terminal 20 connected to each other and stores it in the storage unit 13, and sequentially controls the display unit 12 at predetermined time intervals according to the information of the storage unit 13. The central processing unit 15 is configured to include.

The power supply unit 11 may operate by supplying power to the entire system, and may include a separate power switch so that a user can control a power supply function. In this case, the power supply unit 11 may be, for example, a primary battery such as an alkaline battery, a lithium battery, or a secondary battery such as a nickel-cadmium battery, a nickel-hydrogen battery, a polymer battery, or the like.

3 is a perspective view illustrating an appearance of an LED afterimage display device according to an exemplary embodiment, in which power is supplied to the power supply unit 11 at a lower end of a plurality of light emitting devices 16 arranged in a row. The power switch 17 is formed, the lower end portion is connected to the external information terminal has a structure in which a communication port 14 for receiving data is formed. The light emitting device 16 is preferably a light emitting diode (LED) having high reliability, easy modulation, and stable operation in terms of efficiency and cost of manufacturing the device.

In general, in order to display one character, the LED display board displays one character using a total of 64 light emitting elements constituting an 8 * 8 dot matrix as shown in FIG. 4, but in the present invention, the light emitting element 16 is represented. As shown in FIG. 5, the user may move or swing the display device laterally while controlling the blinking of the LEDs sequentially at predetermined time intervals from S1 to S8 as shown in FIG. 5. When swinging, the character string shown in the lower part can be displayed by the afterimage effect.

In this way, a single character string can be displayed in the air with only one light emitting element by using the afterimage effect that the image of the object remains in the human retina for about 1/10 seconds even if the object perceived by human visual perception disappears. It is possible by doing this.

The light emitting device 16 constituting the display unit 12 is most preferably composed of only eight vertical lines from 8 * 8 which is a basic unit of the dot mat matrix for displaying characters, but the number or number of display units Length and spacing can be adjusted in various ways.

The storage unit 13 displays a predetermined character string in a dot matrix, which is a virtual display matrix space constituted by an afterimage effect, as a user repeatedly shakes the display unit 12 in a direction substantially perpendicular to the direction in which the display unit 12 is arranged. One or more string display information is stored. For example, if the storage unit 13 has character string display information consisting of four characters “Korea”, the storage unit 13 has a minimum dot matrix for displaying the character string as shown in FIG. 6. Arrange by assigning.

The central processing unit 15 receives the position information of the dot matrix stored in the storage unit 13 in units of columns from the left side at predetermined time intervals so that the eight light emitting elements 16 are set in one set to blink sequentially. Or a set representing one character each time the switch is pressed by the switch 17 or another switch element (not shown), that is, S1 to S7, S10 to S15, S18 to S23 and S26 to FIG. S31 may be turned on sequentially. In this case, the interval between characters S8 ~ S9, S16 ~ S17 will be determined by the time interval when the user presses the switch. When all the character strings are displayed, the central processing unit 15 is repeatedly operated from the beginning again.

The information terminal 20 includes a personal computer, a mobile phone, a personal digital assistant (PDA), a web pad, a pocket PC, an e-book terminal having an input means such as a keyboard and a keypad and a communication means for exchanging data with an external device. Etc. Various devices may be used. In particular, the personal computer is equipped with a universal input means using a keyboard, and has a variety of communication ports such as RS-232C port, USB port, infrared (Ir) port, serial communication and infrared through wired cable While there is an advantage that can be connected in various ways such as a wireless method using a port, there is a disadvantage that can not be carried.

The communication port 14 is provided with an interface corresponding to the communication interface of the information terminal 20 in order to receive information related to a character string from the information terminal 20, for example, an RS-232C interface, a USB interface, or the like. Infrared interfaces, Bluetooth interfaces, and the like may be used. In particular, for serial communication using the RS-232C and USB interface, the communication port 14 and the information terminal 20 should be connected through a predetermined cable. In addition, in the case of using the infrared interface and the Bluetooth interface, the communication with the information terminal 20 is performed wirelessly without using a separate cable.

Hereinafter, the operation and effects of the present invention will be described in detail.

First, a method of inputting data using a mobile phone according to an embodiment of the present invention will be described. 7 is a diagram illustrating a state in which a mobile phone is connected according to an embodiment of the present invention.

As shown in FIG. 7 to input a character string to be displayed, a serial port is provided at the data communication port 23 formed at the lower end of the mobile phone 22 and the communication port 14 formed at the lower end of the LED afterimage display device 10, respectively. After inserting and connecting both ends of the cable 21, the power switch 17 of the LED afterimage display device 10 is turned on to start the central processing unit 15 to receive data. Then, the keypad 24 of the mobile phone 22 is operated to input a desired character string through the LCD display window, and when the input is completed, press a predetermined transmission button from the mobile phone through the serial cable 21 through the central processing unit 15. Send data to

The central processing unit 15 stores the data information received in the state of being linked with the mobile phone by a predetermined protocol in the storage unit 13. After receiving the data, the mobile phone 22 is disconnected from the communication port 14 by disconnecting the serial cable 21 connecting the communication port 14.

If one of the data stored in the storage unit 13 is selected and inputted to display the received data, the central processing unit 15 transmits a corresponding string data from the storage unit 13. By sequentially reading the information one by one at predetermined time intervals, the flashing of the light emitting elements 16 of the display unit 12 is controlled.

At this time, the user moves the display unit 12 laterally or vertically at a constant speed so that the display unit 12 is stored in the storage unit 13 by the flashing period of the light emitting elements 16 and the afterimage effect according to the moving speed of the user. A predetermined character string is formed on the space.

8 is a diagram illustrating a state in which a personal computer is connected according to another embodiment of the present invention, wherein data is transmitted using an infrared signal between the infrared port 26 of the personal computer 25 and the communication port 14 of the present invention. Is configured to receive.

In the case of using a personal computer, there is an advantage in that characters and various emoticons, images, and the like can be freely edited and inputted using various application programs of the personal computer.

According to the present invention having the above-described configuration, a conventional LED afterimage display device simply inputs information to be displayed through an information terminal such as a mobile phone or a personal computer, and inputs the inputted information through serial communication or infrared rays. By receiving it by communication and storing it in a memory, it is possible to freely customize (costomizing) a string that can be represented on an existing LED afterimage display device.

In the embodiment of the present invention has been given an example of a method of inputting a plurality of strings in the storage unit 13 and selecting one of them, but in a state in which a single string is input directly to the LED flashing state without a separate selection step or Alternatively, the LED afterimage display device and the information terminal can be used without disconnecting. In addition, when displaying a plurality of characters in succession, it is possible to produce a continuous display without removing the time interval between the characters.

Many other variations are possible, and one of ordinary skill in the art will readily be able to infer these variations.

Claims (7)

A power supply for supplying power, Display unit consisting of at least two light emitting elements arranged only in a line, A storage unit for storing data to be displayed by the display unit; A communication port linked with an external information terminal for transmitting and receiving the data; And a controller configured to receive the data from the information terminal connected through the communication port, store the data in the storage unit, and control the blinking of the light emitting element column of the display unit. After at least two predetermined time intervals, the display unit sequentially displays portions visually representing the data, and maintains the same flashing state within one predetermined time interval, thereby remaining after the display unit is swinging in space. By means of which a complete visual form of the data is displayed in the space. The method of claim 1, And the communication port is connected to the information terminal via a predetermined wired cable to receive data through serial communication. The method of claim 1, And the communication port is linked with the information terminal by a radio signal to receive data by a predetermined protocol. The method according to any one of claims 1 to 3, And the information terminal is a portable terminal having at least one communication port corresponding to the communication port for transmitting and receiving data. The method of claim 4, wherein The after-image display device, characterized in that the information terminal is a portable mobile communication terminal. The method according to any one of claims 1 to 3, An after-image display device, wherein the information terminal is a personal computer. The afterimage display device of claim 1, wherein the data is at least one character.