KR20000006665A - Apparatus for controlling a driver in a led panel - Google Patents

Abstract

PURPOSE: An LED(light emitting diode) driving controller is provided to drive many LED modules by direct driving control using a common bus in an LED display device having the modules. CONSTITUTION: The controller comprises a memory prestoring many letters and/or graphic data to be displayed through each of the LED modules; a CPU(central processing unit) generating an address signal for addressing each of the LED modules and a selection control signal to be transmitted through an address bus and a control bus; many latchers receiving the letter and/or graphic data supplied through the data bus to be outputted to each of the LED modules according to the selection control signal supplied through the control bus; and an LED panel having the many modules displaying the letters and/or graphic data supplied through each of the latchers according to the address signal supplied through the address bus.

Description

LED display driving controller {APPARATUS FOR CONTROLLING A DRIVER IN A LED PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode (LED) display device, and more particularly, to an LED display driving controller suitable for efficiently driving an LED display device composed of a plurality of LED modules for displaying text and graphics.

In general, the LED display device is a display device that is commonly used in outdoor billboards, sign boards of automobiles, guide boards in trains, and the like, by applying a voltage to an LED matrix composed of a plurality of light emitting diodes to generate light. B. A device that displays graphics data.

3 is a view illustrating a configuration of a conventional LED display device according to the present invention, and includes a first memory unit 310, a CPU 320, a second memory unit 330, an input / output interface 340, First, second,... , N-th drive control units 350-1, 350-2, ..., 350-n, first, second,... , N-th latch portions 360-1, 360-2, ..., 360-n, first, second,... And n-th LED modules 370-1, 370-2, ..., 370-n.

Referring to FIG. 3, the configuration and general operation of a conventional general LED display device will be described in detail.

First, the first memory unit 310 is a means for storing a plurality of text and / or graphic data for display through each LED module 370-1, 370-2, ..., 370-n to be described later, The CPU 320 generates various control signals for controlling the overall operation of the LED display device, and in particular, any characters and / or graphics to be displayed among the characters and / or graphic data previously stored in the first memory unit 310. The data is read and temporarily loaded in the second memory unit 330.

That is, in order for the CPU 320 to display a plurality of characters and / or graphic data stored in the first memory unit 310 through the LED modules 370-1, 370-2,. Any character and / or graphic data to be temporarily loaded into the second memory unit 330 is then read again and displayed through each component including the input / output interface unit 340 to be described later. In addition, the CPU 320 includes a program for displaying text and / or graphic data through the respective LED modules 370-1, 370-2,..., 370-n, and thus the second memory unit 230. When reading and providing any character and / or graphic data loaded to the I / O interface unit 240, an address control signal necessary for displaying each data is generated and transmitted together.

In addition, the input / output interface 340 receives the character and / or graphic data and the address control signal provided from the CPU 320 to each LED module 370-1, 370-2, ..., 370-n. First, second,... For driving; The second driving control unit 350-1, 350-2,.

Meanwhile, each of the driving controllers 350-1, 350-2,..., 350-n respectively means for controlling the display operation of the corresponding LED module 370-1, 370-2,..., 370-n. In this case, the character and / or graphic data provided from the above-described CPU 320 are composed of elements, commonly referred to as driver ICs, to the corresponding latch portions 360-1, 360-2, ..., 360-n, respectively. After the transmission, the corresponding drive control signal (including the address signal) is generated based on the address control signal from the CPU 320, and corresponding LED modules 370-1, 370-2, ..., 370-n are respectively generated. To provide.

Thus, each LED module 370-1, 370-2, ..., 370-n is provided with a character and / or provided through a corresponding latch portion 360-1, 360-2, ..., 360-n, respectively. The graphic data is displayed based on control signals (including address signals) provided from the corresponding driving control units 350-1, 350-2, ..., 350-n, respectively.

Meanwhile, in the conventional general LED display device as described above, as shown in FIG. 3, each driving control unit 350-1 and 350-is applied to each LED module 370-1, 370-2,..., 370-n. 2, ..., 350-n) should be constructed in a one-to-one correspondence. In other words, in order to drive a plurality of LED modules included in the LED display apparatus, as many driving controllers (driver ICs) as the number of LED modules are required, and therefore, to manufacture an LED display apparatus having a plurality of LED modules. There is a problem that excessive manufacturing costs.

If the driving control of each LED module can be realized without using a separate driving control means (driver IC) for each of the plurality of LED modules provided in the LED display device, the manufacturing cost of the LED display device can be remarkably increased. It will be possible to reduce the number of LED display devices and expand the scope of application. In addition, it will be possible to further promote the propagation of the rear sign board for automobiles using the LED display device.

Accordingly, the present invention has been made in view of the above-mentioned, LED display drive control device that can drive a plurality of LED modules through direct drive control using a common bus in the LED display device having a plurality of LED modules. The purpose is to provide.

The present invention according to an embodiment for achieving the above object, in the LED display drive control device for controlling the display of the LED panel consisting of L LED modules each having a pixel structure of N × M, each LED module is It is connected to the main CPU via an address bus, a data bus, and a control bus, and displays each character or graphic data selected by the user based on address signals, data signals, and selection signals provided from the main CPU through the respective buses, respectively. It provides an LED display drive control device characterized in that.

According to another aspect of the present invention, there is provided an apparatus for controlling driving of an LED panel including L LED modules each having an N × M pixel structure. Memory unit for pre-store a plurality of character and / or graphic data for; A program for driving the respective LED modules to selectively read the plurality of pre-stored text and / or graphic data and to transmit the data through a data bus, and to display the read text and / or graphic data. A CPU for generating an address signal and a selection control signal for addressing the module and transmitting the same through an address bus and a control bus, respectively; A plurality of latch units receiving the text and / or graphic data provided through the data bus and outputting the text data to the LED modules based on the selection control signal provided through the control bus; It provides an LED display drive control device comprising an LED panel consisting of the L LED module for displaying the character and / or graphic data provided from each latch unit based on the address signal provided through the address bus. .

1 is a block diagram showing the configuration of the LED display control apparatus according to a preferred embodiment of the present invention,

Figure 2 is a block diagram showing the configuration of the rear sign board for automobiles implemented using the LED display drive control apparatus according to the present invention,

3 is a block diagram showing a configuration of a conventional general LED display device.

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

110: CPU 120, 130: first and second memory unit

140: drive control parts 150-1 to 150-n: first to nth latch parts

160-1 to 160-n: first to nth LED modules

Hereinafter, a method and apparatus for controlling driving of an LED display device according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, a key technical aspect of the present invention is different from the above-described conventional apparatus for driving and controlling each LED module by providing a driver IC for each LED module, respectively, by using an address bus, a data bus, and a control bus. By directly connecting the LED modules and using each of these buses to realize the driving control of each LED module directly, the LED display device used as an outdoor billboard, a sign board of a car, a guide board in a train, etc. It is to simplify the configuration means for this and thereby significantly reduce the manufacturing cost of the LED display device.

1 is a block diagram illustrating a configuration of an LED display device according to an exemplary embodiment of the present invention, wherein the CPU 110, the first memory unit 120, the second memory unit 130, and the driving control unit 140 are shown. , First, second,... , N-th latch portions 150-1, 150-2, ..., 150-n, first, second,... , N-th LED module 160-1, 160-2, ..., 160-n.

Referring to the figure, the CPU 110 generates various control signals for controlling the overall operation of the LED display device according to the present invention, the first memory unit 120 is each LED module (160-1, 160) -2, ..., 160-n) store a plurality of text and / or graphic data for display. In addition, the second memory unit 120 may display the plurality of character and / or graphic data pre-stored in the first memory unit 120 through the LED modules 160-1, 160-2, and 160-n. Any character and / or graphic data is the means by which the CPU 110 is temporarily loaded.

That is, the CPU 110 reads out any character and / or graphic data to be displayed among the character and / or graphic data previously stored in the first memory unit 120 and loads the character and / or graphic data in the second memory unit 130. The first, second, ... will be described later via the data bus 112. And the nth latch portions 150-1, 150-2, ..., 150-n. In addition, the CPU 110 receives new text and / or graphic data input from an external device (for example, a personal computer, etc.) via the serial bus 111 and stores the new text and / or graphic data in the first memory unit 120. The character and / or graphic data previously stored in the first memory unit 120 may be updated.

Accordingly, the first memory unit 120 may write and delete data stored therein, and may be configured as memory means (for example, flash memory, EEPROM, etc.) that do not lose the stored data even when the power supply is cut off. It is preferable.

In addition, the CPU 110 includes a program for displaying text and / or graphic data through the respective LED modules 160-1, 160-2,..., 160-n, and the second memory unit 120. In the process of reading the text and / or graphic data temporarily loaded into the N-S) and providing the same through the data bus 112, an address control signal and a driving control signal corresponding thereto are generated and provided to the driving controller 140.

Unlike the conventional LED display device, the driving controller 140 controls the plurality of LED modules 160-1, 160-2,..., 160-n to directly drive the joints through an address bus, a data bus, and a control bus. It is composed of a means capable of, and has the function of controlling each LED module (160-1, 160-2, ..., 160-n) at the same time. In detail, the driving controller 140 is configured to control the latch units 150-1, 150-2,..., 150-n described later through the data bus 112 based on the address control signal provided from the CPU 110. Address bus 113 by generating a line select signal specifying an address for an LED matrix in each LED module 160-1, 160-2, ..., 160-n corresponding to the character and / or graphic data provided in Through each of the LED module (160-1, 160-2, ..., 160-n) is provided.

At the same time, each latch unit 150-1 and 150-2 corresponding to each of the LED modules 160-1, 160-2, ..., 160-n, 150-3, 150-4, ..., 150- ( A latch select signal for alternately selecting n-1) and 150-n is generated and provided to each latch unit 150-1, 150-2, ..., 150-n through the control bus 114. do.

Meanwhile, in FIG. 1, each latch unit 150-1, 150-2,..., 150-n is configured to correspond to two LED modules, which is a driving control apparatus of the LED display device according to the present invention. It is only an exemplary embodiment illustrated for implementation, and may be configured as one latch unit or two or more latch units in one LED module according to need or use.

In addition, when two latch units are configured to correspond to one LED module as shown in FIG. 1, character and / or graphic data provided from the CPU 110 may be divided and stored through the data bus 112. For example, when each LED module 160-1, 160-2,..., 160-n shown in FIG. 1 is an 8 × 16 LED module composed of two 8 × 8 LED metrics, one latch unit is used. Eight bits of character and / or graphic data are stored. Accordingly, one latch unit is responsible for data corresponding to eight lines of each matrix line in the corresponding LED module.

Of course, in the above embodiment, but the 8 × 16 LED module as an example, this is only an exemplary embodiment for implementing a drive control device of the LED display device according to the present invention, according to the need or use of the technical Based on the idea, it can be configured as 8 × 8 LED module, 16 × 8 LED module or 16 × 16 LED module.

On the other hand, each of the LED modules 160-1, 160-2, ..., 160-n has a pair of latch portions 150-1, 150-2, 150-3, 150-4, ..., Character and / or graphic data provided from 150- (n-1) and 150-n are displayed based on the address selection signal (line selection signal) provided via the address bus 113.

Referring to Figure 1 described in detail the overall operation of the LED display drive control device according to the present invention.

In the LED display device configured as described above, power of the LED display device is applied by a user's operation to display predetermined text and / or graphic data among a plurality of text and / or graphic data previously stored in the first memory unit 120. In order to display or display any character selected by the user, the CPU 110 first selects a corresponding character and / or graphic data (preset or selected) from among a plurality of characters and / or graphic data stored in the first memory unit 120. Character and / or graphic data) is read and loaded into the second memory unit 130.

In addition, the CPU 110 reads out the character and / or graphic data loaded in the second memory unit 130, and reads the LED modules 160-1, 160-2,..., 160-through the data bus 112. to the respective latch portions 150-1, 150-2, ..., 150-n corresponding to n), and at the same time to display character and / or graphic data read out from the second memory portion 130; Generates a line select signal (address signal) designating each line of the LED matrix in each LED module 160-1, 160-2, ..., 160-n, and transmits each LED module 160- through the address bus 113. 1, 160-2, ..., 160-n, and the LED module corresponding to the character and / or graphic data provided to each latch unit 150-1, 150-2, ..., 150-n, respectively. A latch selection signal for alternately outputting is generated and provided to each latch unit 150-1, 150-2,..., 150-n through the control bus 114.

Therefore, a pair of latch portions 150-1 and 150-2, 150-3 and 150-4, ..., 150- correspond to each of the LED modules 160-1, 160-2, ..., 160-n, respectively. By driving the light emitting diode of the corresponding LED matrix based on the character and / or graphic data provided from (n-1) and 150-n and the address selection signal (line selection signal) provided through the address bus 113, Text and / or graphic data is displayed via each LED module 160-1, 160-2, ..., 160-n.

As a result, when the LED display device having the drive control device according to the present invention is used as an outdoor advertisement board, a rear sign board of a car, a guide plate in a train, and the like, as described above, it is possible to install at a lower manufacturing cost. The case where the LED display device according to the present invention is used as a rear sign board of an automobile will be described as an example.

2 is a block diagram showing the configuration of a sign board of a vehicle implemented using the LED display driving control apparatus according to the present invention, the user operating means 210, the microcomputer 220, the memory unit 230, the rear LED Device 240.

First, the rear LED device 240 shown in FIG. 2 is an LED display device having the configuration as shown in FIG. 1, and the memory unit 230 is the same as the first memory unit 120 shown in FIG. 1. It is a means of construction. That is, the rear sign board for automobile illustrated in FIG. 2 is configured to separately separate the first memory unit 120 of the LED display apparatus 100 illustrated in FIG. 1 for convenience of description.

Referring to FIG. 2, the user operating means 210 is a means for generating a key signal corresponding to a user's operation by providing various key buttons for the user to control the rear LED device 240, and the memory unit 230. A selection key (e.g. a numeric key) for selecting multiple text and / or graphic data stored in the device and a message (e.g., in one operation) in the event of a vehicle emergency (e.g. vehicle strength). , An emergency key for displaying a 'please help').

In addition, the microcomputer 220 controls the on / off of the rear LED device 240 on the basis of the key signal generated from the user operating means 210 and a plurality of characters previously stored in the memory unit 230; And / or selectively read out graphic data and provide it to the rear LED device 240. In addition, the microcomputer 220, like the CPU 110 in FIG. 1 described above, transmits text and / or graphic data provided from an external device (for example, a personal computer or a notebook computer) through the serial bus 221. The character and / or graphic data received and stored in the memory unit 230 may be updated.

Meanwhile, the rear LED device 240 displays text and / or graphic data read and provided from the microcomputer 220 as described above, so that the user can inform other vehicles of a desired message.

As a result, by using the LED display device configured as shown in Figure 1, it is possible to spread a lower price automotive back sign board.

As described above, according to the present invention, the LED display device is manufactured by realizing the drive control of each LED module without using a separate drive control means (driver IC) for each of the plurality of LED modules included in the LED display device. There is an effect that can significantly reduce the cost. In addition, by implementing a rear sign board for automobiles using an LED display device of a low price, it is possible to further promote the spread of the rear sign board for automobiles.

Claims (11)

In the LED display drive control device for controlling the display of the LED panel consisting of L LED modules each having a pixel structure of N × M, Each of the LED modules is connected to the main CPU via an address bus, a data bus, and a control bus, and any character selected by the user based on address signals, data signals, and selection signals provided from the main CPU via the respective buses, respectively. Or LED display drive control device for displaying graphic data. The LED display driving control apparatus according to claim 1, wherein each of the LED modules has a pixel structure of 8x16 or 8x8 or 16x16 or 16x8. The LED display driving control apparatus according to claim 1 or 2, wherein the character or graphic data is any one of a plurality of character or graphic data which are preset and stored in a memory. 4. The LED display drive control apparatus according to claim 3, wherein the text or graphic data is information which can be updated according to a user's operation. In the device for controlling the driving of the LED panel consisting of L LED modules each having a pixel structure of N × M, A memory unit which pre-stores a plurality of character and / or graphic data for display through each of the LED modules; A program for driving the respective LED modules to selectively read the plurality of pre-stored text and / or graphic data and to transmit the data through a data bus, and to display the read text and / or graphic data. A CPU for generating an address signal and a selection control signal for addressing the module and transmitting the same through an address bus and a control bus, respectively; A plurality of latch units receiving the text and / or graphic data provided through the data bus and outputting the text data to the LED modules based on the selection control signal provided through the control bus; And an LED panel comprising the L LED modules for displaying the text and / or graphic data provided from the latch units based on the address signal provided through the address bus. The LED display driving control apparatus according to claim 5, wherein each of the LED modules has a pixel structure of 8x16, 8x8, 16x16, or 16x8. 7. The LED display driving control apparatus according to claim 5 or 6, wherein the character or graphic data pre-stored in the memory unit is data which can be updated with new character or graphic data input from the outside. 8. The LED display drive controller of claim 7, wherein the new text or graphic data is provided to the CPU from a computer via a serial bus. 8. The LED display apparatus of claim 7, wherein the LED panel is a vehicle LED mounted as a rear sign board in a vehicle, and the LED display driving control device includes a plurality of key buttons for the user to select the arbitrary text or graphic data. LED display drive control device further comprising a user operating means. The method of claim 9, wherein the user operation means A power keyburn to turn on / off the power of the LED panel; A selection key button for selecting and displaying the plurality of text and / or graphic data; And an input key button for receiving the new text and / or graphic data and updating the pre-stored text and / or graphic data. 11. The LED driving display apparatus according to claim 10, wherein the user assistant means further comprises an emergency key button which is driven by one user operation to inform the outside of an emergency of the vehicle.