JP2001154613A - Panel type led display module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-profile and light panel type display module. SOLUTION: This is a panel type display module and three arrays of LED lamps of 1st to 3rd colors mounted on straight lines at a pitch a in the vertical direction on a rectangular printed wiring board are arranged in parallel at a pitch b equal to the pitch a or smaller and formed into a set of primary-color LED lamp arrays, and also plural sets of primary-color LED lamp arrays are arranged in parallel at a pitch c not smaller than four times the pitch b; one or more pieces of integrated circuits are mounted on each lampless belt-form area of a width d not smaller than two times the pitch b between adjoining sets of primary-color LED lamp arrays; a total dimensions of widths p and q, which is the width between the right-end LED lamp array and the right end of the wiring board and the width between the left-end LED lamp array and the left end of the wiring board, is made equal to the pitch c or slightly smaller; and the lines for connecting a connector and the LED lamps mounted on the end part of the wiring board with the integrated circuit are formed in a pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel-type LED display device which is applied, for example, as an advertising signboard on a street or a guide signboard at an airport, and more particularly to an improvement in a mounting technique of an LED lamp driving circuit.

[0002]

2. Description of the Related Art There is a large-screen panel type LED device (LED display) as an advertising signboard on the street or a guidance display board at an airport. In this LED display, LEDs arranged in a dot matrix form are appropriately lit and driven to display characters and images on the dot matrix screen.

Usually, when installing a large-screen LED display, a plurality of small panel-type display modules are used, and these modules are connected vertically and horizontally to form a large screen. In each module, an LED lamp is mounted on the front surface of a thick panel-shaped case, and an LED drive circuit is built in the case. At an appropriate position such as the side of the panel, a connector for electrically connecting to another module is provided.

[0004]

In the panel case of the LED display described above, a front substrate on which LED lamps are mounted and a number of circuit substrates on which various electric circuits are mounted are housed. The circuit boards are combined orthogonally behind the front board and stacked in a shelf shape. Therefore, the conventional module has a problem that it is difficult to reduce the thickness and weight. In general, when a module is combined into a large-screen display, the module is brought in and installed in a state where it is assembled on a large screen in advance. Therefore, a huge display must be brought to the installation location,
Transportation costs increase. Furthermore, if some of the modules fail after the display is installed, it is difficult to replace the modules and the maintenance is poor.

Accordingly, it is an object of the present invention to provide a panel-type display module which achieves a reduction in thickness and weight and is easy to assemble, install and replace.

[0006]

Means for Solving the Problems === Premise of the present invention ==
= Applicants have previously developed and commercialized a scroll display device disclosed in detail in Japanese Patent Application Laid-Open No. 8-179717. The present invention achieves the above object by actively utilizing the features of this type of display device. This display device uses a scroll display technology in which a large-sized and fine image can be visually recognized with a small number of light-emitting elements (eg, LED lamps).

FIGS. 4A and 4B are schematic diagrams showing a screen portion of the scroll display device. A large number of LED lamps 3 are linearly arranged at a small constant interval a to form a lamp array 8, and a plurality of the lamp arrays 8 are prepared and arranged in parallel at a constant interval c which is several times or more the above a. ing.
The screen 20 of the scroll display device is constituted by the plurality of lamp rows arranged at intervals (A). Each lamp array 8 is mounted on the front surface of a rectangular cylindrical case 21, and its driving circuit is housed inside the case 21 (A). In the case of performing color display, as shown in FIG. 4B, three primary color LED lamps are arranged by arranging three LED lamp rows 8a to 8b corresponding to the three primary colors in parallel at an interval b equal to or less than a. A row set 9 is used, and an adjacent LED lamp row set 9
May be arranged in parallel with an interval c. Note that a ladder-like case may be adopted, and an LED lamp array may be provided on the crosspiece. Next, a description will be given of a display control for scroll-displaying the LED lamp rows arranged at intervals as a screen.

First, LEs arranged at intervals c are discretely arranged.
D lamp row (If there are LED lamp rows of three primary colors, LE
It is assumed that there is also a virtual LED lamp row between (D lamp row set), and bitmap image data to be displayed on a dot matrix screen including this virtual LED lamp is prepared. Of the image data, L that actually exists
The corresponding LED is driven using the data assigned to the ED lamp row. Further, the bitmap image is updated at predetermined time intervals so as to scroll in a direction crossing the LED lamp array, and the LED corresponding to the data corresponding to the actual LED lamp in the updated image is updated.
Each LED lamp of a lamp (LED lamp row) is driven.

In this display system, in principle, a fine image such as a character string or a figure cannot be shown to an observer in a stationary state. An image is moved at a higher speed than a normal scroll display on a screen of an intermittent dot row having an extreme difference in dot density between the row direction and the column direction. By causing the observer to follow the line of sight to the movement of the image, an afterimage effect due to the function of the observer's retina and the visual center is drawn out, and a fine scroll image in which the intervals between the dot rows are interpolated by the afterimage effect is obtained. It is the principle of seeing.
Starting by tracking this scrolling image with the line of sight, the characteristic mechanism that allows you to visually recognize the fine image interpolated by the afterimage effect is named tracking interpolation scroll display, and the display using this method is called the tracking interpolation type I decided to call it a scroll display device.

The inventor of the present invention has sought to make it possible to flexibly cope with various screen sizes by modularizing the tracking interpolation type scroll display device in the same manner as the dot matrix type LED display device. The tracking interpolation type scroll display device has an extremely small number of LED lamps and a small number of drive circuits in proportion to the number of LEDs as compared with a conventional LED display. Therefore, LED
It can be said that the possibility of reducing the thickness and weight of the display is inherent. By utilizing the features of this tracking interpolation type scroll display device, we aimed to further reduce the weight and thickness and to improve the ease of assembly and replacement.

=== Summary of the Present Invention === The panel-type LED display module of the present invention has the following requirements (1) to (9). (1) On the surface of a rectangular printed wiring board, a large number of L
The ED lamps are mounted in a straight line at a constant small pitch a in the vertical direction. This row of LEDs in the vertical direction
A set of lamps is called an LED lamp row. LED
The lamp row includes a row of first color LED lamps and a second color LED.
There are three types: a row of lamps and a row of third color LED lamps. (2) A total of three rows of one row of the first color LED lamp row, one row of the second color LED lamp row, and one row of the third color LED lamp row are arranged in a predetermined order at a pitch b equal to or less than the pitch a. And are arranged in parallel (b ≦ a). The first three colors
A set of LED lamp arrays of the second color and the third color is represented by the three primary colors L
This is referred to as an ED lamp row set. (3) A plurality of sets of three primary color LED lamps are arranged in parallel at a pitch c that is four times or more the pitch b (c>).
4b). (4) In the printed wiring board, three adjacent primary colors L
Between the ED lamp row sets, there is a non-ramp strip area having a width d (d ≒ c−2b) that is at least twice the pitch b.
One or more integrated circuits are mounted in each of the no-lamp strip areas. (5) The total dimension of the distance p between the rightmost LED lamp row and the right end of the printed wiring board and the distance q between the leftmost LED lamp row and the left end of the printed wiring board is substantially equal to or slightly smaller than the pitch c. (P + q ≦ c). (6) A connector for transferring power, data signals, and control signals to and from external elements is mounted on an end of the printed wiring board. (7) A power supply line connecting the connector and each of the integrated circuits is formed in a pattern on the printed wiring board. (8) In the printed wiring board, a data control signal line connecting the connector and each of the integrated circuits is formed in a pattern. (9) In the printed wiring board, a drive signal line connecting each LED lamp row and the integrated circuit mounted adjacent thereto is formed in a pattern.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS === Module Configuration == FIGS. 1 and 2 show the configuration of a panel-type display module (hereinafter, module) according to an embodiment of the present invention. FIG. 1 is a perspective view showing the appearance of the module, and FIG. 2 (A) is a plan view thereof. FIG. 2B is a partially enlarged view of the module. The module 1 includes a large number of LED lamps 3a to 3c, a driving IC 4 for the lamps 3a to 3c, and a data processing I
C5 is implemented. On the back surface, a signal connector 6 connected to a communication path for data and control signals and a power supply connector 7 connected to a power supply path are mounted.

There are three types of LED lamps 3a to 3c corresponding to the three primary colors of RGB. LED lamp 3 of each color of RGB
a to 3c are arranged at a predetermined pitch a to form LED lamp rows 8a to 8c of respective colors. Further, the LED lamp rows 8a to 8c of the respective colors are densely arranged in three rows at a pitch b equal to or less than the pitch a to form an LED lamp row set 9.

In this embodiment, five sets of LED lamp arrays 9 are arranged on the substrate 2 at predetermined intervals c. This interval c is at least four times the a. The gap (no-lamp band-shaped area) 10 between the LED lamp sets 9 formed by the interval c corresponds to each of the I
This is a mounting area for C4 and C5.

Further, the distance p between the LED lamp array mounted on the right end of the board 2 and the right end of the board, and the LED on the left end
The sum (p + q) of the distances q between the lamp rows and the left end of the substrate is set smaller than the interval c between the LED lamp row sets 9. Thus, when the modules 1 are arranged side by side in the left-right direction, the LED lamp row 9 on the right end (left end) of the module 1 and the left end (right end) of the module 1 arranged on the right (left) thereof Even if the interval is adjusted to c, the substrates 2 of the adjacent modules 1 do not overlap.

Printed wiring is provided on both sides of the substrate 2. Terminals corresponding to each signal line included in the signal connector 6 and a predetermined data processing IC 5
Are connected to the respective terminals of the power supply connector 7 corresponding to the respective polarities (+/−) and the power supply terminals and ground terminals of the ICs 4 and 5. In addition, each driving IC 4
Is each LED lamp 3 of the adjacent LED lamp row set 9
a to 3c are driven, and a predetermined terminal of each driving IC 4 and a corresponding terminal of the corresponding LED lamp 3a to 3c are appropriately connected. Of course, various mounting components such as a resistor and a capacitor are mounted at appropriate positions on both sides of the substrate 2 and are appropriately connected by printed wiring. Further, in the present embodiment, the signal connector 6 and the power supply connector 7 are provided in pairs, each of which is two, and printed wiring is performed so that the polarity of each signal line and the power supply connector 7 included in the signal connector 6 match each other. Are connected to each other, with one connector serving as an input side for signals and power and the other serving as an output side. Data, control signals, and power are transferred to and from external elements such as other modules via the connectors 6 and 7.

=== Configuration of LED Display === A plurality of modules of the present invention constitute a display screen of the above-described tracking interpolation type scroll display device by being arranged in parallel. FIG. 3 is a schematic view of a tracking interpolation type scroll display device including the module 1 of the present embodiment. In this display device, a screen is formed by arranging a plurality of modules on the left and right such that the intervals between the LED lamp rows 9 are all c. When installing this screen (fixing the module), a frame or the like may be installed behind the module, and the substrate may be directly fixed to the frame with bolts or the like. Of course, the present invention is not limited to this installation method. For example, a frame can be prepared along the outer shape of the substrate, and the frame can be appropriately fixed by another method.

As described above, each module 1 has a pair of signal connectors and a power connector. And
By daisy-chaining the connectors on the input side and the output side between adjacent modules 1, data signals, control signals, and power are sequentially transferred from the preceding module to the next module. In addition, a communication path 11 from a signal source such as data and control signals and a power supply path 12 from a power supply are connected to the input connector of the terminal module 1E.

In each module, each data processing IC fetches data addressed to itself and transfers the data to the corresponding driving IC, and the driving IC appropriately drives and drives a predetermined LED lamp according to the data.

=== Other Applications / Modifications === The configuration of the LED lamp array in the module is not limited to the above embodiment, and the LED lamp array set and the number of LED lamps included in the LED lamp array can be appropriately increased or decreased. . Further, the screen of the tracking interpolation type scroll display device may be constituted by itself without connecting the modules in the row direction.
When the module is installed, the display screen may be configured by exposing the module as it is, or may be housed in a transparent case.

[0021]

As described above, the present invention makes it possible to efficiently mount various integrated circuits by utilizing the arrangement of intermittent LED lamps, which is a feature of the tracking interpolation type scroll display device, and realizes a lightweight and thin panel type. The display module was achieved. In other words, the module is extremely thin and lightweight due to a structure in which a plurality of LED lamp row sets are mounted on a printed circuit board wiring board and various integrated circuits are mounted between adjacent LED lamp row sets.

Therefore, when a plurality of modules are installed side by side to be installed as a large-sized display device, the module is carried into the installation place alone, and the printed wiring board is appropriately fixed to the installation place. It can be assembled into a large display. for that reason,
Transportation costs and assembly costs can be reduced.

Further, since the printed circuit board is used instead of the case for mounting the LED lamp array and housing the driving circuit, the circuit in the case and the LEDs disposed on the surface of the case are electrically connected. It is not necessary to connect to the device, and the manufacturing cost can be reduced. Of course, there is no cost for the case itself.

[Brief description of the drawings]

FIG. 1 is an external view of a panel display module according to an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment. (A) shows an overall view, and (B) shows a partially enlarged view thereof.

FIG. 3 is a schematic configuration diagram of a tracking interpolation type scroll display device including the above embodiment.

FIG. 4 is a schematic configuration diagram of a conventional tracking interpolation type scroll roll display device. (A) shows a configuration for a single color display, and (B) shows a configuration for a multicolor display.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel-type display module 2 Printed wiring board 3, 3a-3c LED lamp 4, 5 Integrated circuit 6, 7 Connector 8, 8a-8c LED lamp row 9 LED lamp row set 10 Non-lamp strip area

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 5C094 AA05 AA14 AA15 BA25 CA19 CA24 JA08 5C096 AA07 BA04 BC20 CC06 CC24 FA02 FA09

Claims (1)

[Claims] 1. A panel-type LED display module having the following requirements (1) to (9). (1) On the surface of a rectangular printed wiring board, a large number of L
The ED lamps are mounted in a straight line at a constant small pitch a in the vertical direction. This row of LEDs in the vertical direction
A set of lamps is called an LED lamp row. LED
The lamp row includes a row of first color LED lamps and a second color LED.
There are three types: a row of lamps and a row of third color LED lamps. (2) A total of three rows of one row of the first color LED lamp row, one row of the second color LED lamp row, and one row of the third color LED lamp row are arranged in a predetermined order at a pitch b equal to or less than the pitch a. And are arranged in parallel (b ≦ a). The first three colors
A set of LED lamp arrays of the second color and the third color is represented by the three primary colors L
This is referred to as an ED lamp row set. (3) A plurality of sets of three primary color LED lamps are arranged in parallel at a pitch c that is four times or more the pitch b (c>).
4b). (4) In the printed wiring board, three adjacent primary colors L
Between the ED lamp row sets, there is a non-ramp strip area having a width d (d ≒ c−2b) that is at least twice the pitch b.
One or more integrated circuits are mounted in each of the no-lamp strip areas. (5) The total dimension of the distance p between the rightmost LED lamp row and the right end of the printed wiring board and the distance q between the leftmost LED lamp row and the left end of the printed wiring board is substantially equal to or slightly smaller than the pitch c. (P + q ≦ c). (6) A connector for transferring power, data signals, and control signals to and from external elements is mounted on an end of the printed wiring board. (7) A power supply line connecting the connector and each of the integrated circuits is formed in a pattern on the printed wiring board. (8) In the printed wiring board, a data control signal line connecting the connector and each of the integrated circuits is formed in a pattern. (9) In the printed wiring board, a drive signal line connecting each LED lamp row and the integrated circuit mounted adjacent thereto is formed in a pattern.