JPH03136090A - Matrix type variable display device - Google Patents

Abstract

PURPOSE:To eliminate the need of an operation for connecting a wiring from a back side, to extremely easily constitute the device and to make it advantageous even in the aspect of maintenance by attaching display panels to a supporting body after arranging them in one direction and separately fitting 1st and 2nd circuit plates in grooves. CONSTITUTION:A driving circuit for a data line and a scanning line is separated from the display panel 1, and the circuits are plurally provided on the respective separate circuit plates 11 and 15, then the display panels 1 and the circuit plates 11 and 15 are attached to the supporting body 31 where the grooves 35 insulated from each other are formed. Therefore, the connection between the display panel and the driving circuit and the connection of other wirings are performed regardless of the supporting body. Then, not only the circuit plate is fitted in an pulled out of the groove but also the display panel is attached to and detached from the supporting body just from the surface side of the supporting body. Thus, the display device consisting of many display panels is extremely easily constituted and becomes advantageous even in the aspect of maintenance coupled with the effect that it is sufficient to exchange only the display panel even when a display element is deteriorated or broken.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is directed to a plurality of dot matrix type display panels using light emitting diodes or liquid crystals as display elements in a vertical direction.
The present invention relates to a variable display device configured to be arranged in one or both of the horizontal directions.

[Prior Art] As a means of displaying information such as characters and figures, wiring is provided in a matrix on the back side of a substrate, and a display surface made of light emitting diodes or liquid crystals arranged on the front side is divided into small sections and sequentially emitted light. It is widely known to use display panels that display predetermined characters, figures, etc. as a whole, and when displaying complex information using kanji, etc., multiple display panels with a large number of dots are used. The pieces are arranged.

However, in order to cause a light emitting diode to emit light or to excite a liquid crystal to emit light and display a predetermined character or figure on a display panel, the scan line must be switched in a time-sharing manner with a drive circuit that provides a light emission pattern to the data line. A drive circuit to sequentially emit light and an electronic controller to send signals to these are required, and the drive circuit and cooling fins are assembled on the back side of a display panel that has a display element made of a light emitting diode or liquid crystal and a matrix of wiring. Most commercially available products are assembled into units.

FIG. 5 schematically shows a variable display device which is currently in widespread use and is constructed by arranging such display panels, in which display elements 102 are arranged in a grid pattern on the surface of a substrate +01. A data line drive circuit 1 is installed on the back side of the display panel +04, which has matrix wiring 103 on the back side.
05 and a scan line drive circuit 106 are attached to a base +07 with cooling fins 108,
By screwing leg pieces 109 provided at the four corners of the substrate 101 to a flat mounting base 110, the substrates 101 are arranged substantially adjacent to each other on one plane. And the mounting stand! Adjacent display panels 1 through 10 window holes Ill
The corresponding drive circuits 105 and 106 of 04 are connected to the signal a112.
．． 113, and a power supply frame 114 made of a flat bar and a ground rod 116 are connected to a scan line drive circuit 106 and a data line drive circuit 105, respectively.
The configuration is such that they are connected by a power line 115 and a ground line 117.

That is, since the display panel 104 is fixedly arranged on the mounting base 110 and the necessary wiring is connected from the back side, the mounting base 110, the power supply frame 114, and the grounding rod +15 get in the way, resulting in extremely poor work efficiency. Not only that, but the wiring is complicated, which is disadvantageous in terms of maintenance.

[Problems to be Solved by the Invention] In the present invention, when a drive circuit and a cooling fin are assembled into a display panel to form a unit, the workability is extremely poor when arranging a plurality of display panels, and it is also disadvantageous in terms of maintenance. It is an object of the present invention to solve the problems of the above-mentioned conventional technology, and to provide a matrix type variable display device which can be constructed extremely easily without requiring the work of connecting wires from the back side, and which is advantageous in terms of maintenance.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a plurality of display panels in which display elements are arranged in a grid pattern on the front surface of a substrate and wiring is provided in a matrix on the back surface. at least one each of a first circuit board provided with a plurality of data line drive circuits and a second circuit board provided with a plurality of scan line drive circuits; At least one of the supports has a plurality of parallel and insulated grooves formed by a plurality of conductive plates and an insulating member, and a corrugated fin protruding from the conductive plate, one of which forms an electrode. The display panel is attached to the support body side by side in one direction, and the first and second circuit boards are fitted into the grooves separately.

It is preferable that the display panel is provided with a holding frame on the back side of the substrate, and that the holding frame sandwiches the support so that the display panel can be attached to the support in one direction.

Further, the support body is formed by alternately arranging a plurality of conductive plates having protrusions on one side edge and a flat insulating member, and is insulated so as to be parallel to each other, and one side in the longitudinal direction has the protrusion. It is preferable to have a plurality of grooves closed by strips, and corrugated fins projecting from the protrusions and forming electrodes.

[Connect the output terminal of the drive circuit corresponding to the terminal on the data line of the wiring on the active board and the terminal on the scan line,
Each circuit board is fitted into the groove of the support separately, and the display panel is attached to the support by arranging them in one direction.Firstly, the power supply rod and the ground rod, which are made of flat bars, are connected to specified electrodes so that the circuit boards are connected to each other. Display devices are constructed that are arranged substantially adjacent in one plane. That is, before the display panel and the circuit board are assembled to the support, the wiring is connected and the display panel and the circuit board are attached to and removed from the support from the front side, and the only work from the back side is to connect the electrodes.

[Example] The present invention will be described in detail with reference to the drawings.

FIG. 1 schematically shows the overall configuration, in which a plurality of display panels 1, for example 12, are arranged substantially adjacent to each other, six in the horizontal direction and two in the vertical direction. Six upper display panels 1 and lower six display panels L are mounted on two upper and lower supports 31 and 31 extending in the left and right direction.
are attached respectively, and furthermore, a power supply rod 51 and a grounding rod 52 consisting of flat bars are attached to the back side of the support 31 and 31.
are arranged at right angles.

Referring to FIG. 1.2, a display panel 1 has display elements 3 consisting of light emitting diodes covered with lenses exposed on the surface of a square substrate 2 and arranged in a checkerboard pattern, and displays according to a predetermined lighting pattern. Wiring 4 consisting of a matrix-like circuit network for sequentially lighting up elements 3 is provided on the back surface of substrate 1.

A plate-shaped plate in which legs 6.6 are formed on both sides of the base 5 at right angles and facing each other, a window hole 7 is provided in the base 5, and a ventilation hole 8.8 is provided near the base 5 of the leg 6.6. holding frame 9
The 0 display element 3, which has a configuration in which the dots are fixed to the back surface of the substrate 1, is arranged in an arbitrary number of dots such as 8×8.16×16.

Further, the holding frame 9 is fixed with the base 5 attached to the substrate 1 by gluing or screwing, with the legs 6.6 protruding to the back side, and the wiring 4 is exposed in the window hole 7.

The circuit boards 11, 15, 19.
23 are fitted separately. Referring to FIG. 3, these have a configuration in which necessary printed wiring and electronic equipment are provided on thin strip-shaped insulating plates 12, 16, 20, and 24. That is, the first circuit board 11 connects the six drive circuits 13 and signal lines 14 for the data lines of the six display panels 1 to the insulating board 12.
The second circuit board 15 has six display panels 1
A configuration in which six drive circuits 17 and signal lines 18 for scan lines are provided on an insulating board 16, a third circuit board 19
1 has a configuration in which six adjustment circuits 21 and signal lines 22 for adjusting the brightness of the six display panels 1 are provided on an insulating board 20, and a fourth circuit board 23 has an adjustment circuit 25 for adjusting the brightness. In this configuration, a signal line 26 is provided on an insulating plate 24. Third,
The fourth circuit board 19.23 is used to adjust the energization time of the two light emitting diodes emitting different colors when one display element 3 has two light emitting diodes emitting light of different colors to adjust the brightness and color tone of the mixed color. The timing signal for turning on or turning off the light is outputted to either or both of the drive circuits 13.17 of the first and second circuit boards 11.15, and the timing signal of the light emitting diode used in one display element 3 Although the number varies depending on the number, basically only the first and second circuit boards 11, 15 are required. In addition, the drive circuits 13 and 17 of the first and second circuit boards 11゜15
It is composed of the same circuits as conventional ones, such as shift registers, latches, and transistors.

Referring to FIGS. 2 and 4, the support body 31 includes a flat conductive plate material 32 made of metal such as aluminum and having a rectangular protrusion 33 along the entire length on one edge in the longitudinal direction, Bakelite, Flat plate-shaped insulating members 34 made of a hard insulating material such as synthetic resin are alternately stacked and arranged, both wall surfaces are formed by the conductive plate material 32 and the insulating member 34, and one longitudinal side is closed by a protrusion 33. It has a configuration having four grooves 35. The conductive plate material 32 integrally has square wave-shaped fins 36 that protrude in the opposite direction to the grooves 35 of the protrusion 33, and one of the fins 36 protrudes more than the other to form an electrode 37,38. There is. Note that the electrodes 37 of the conductive plate 32 forming the groove 35 into which the second circuit board 15 for the scan line is fitted are the electrodes 37 of the conductive plate 32 forming the groove 35 into which the other circuit boards 11, 19, and 23 are fitted. The electrode 38 is provided at a different position. Further, an insulating member 35 is arranged on both outer surfaces, and a metal cover plate 39 is further placed on the outer side of the insulating member 35.
a, 35a, and 39a are integrated by inserting and tightening insulating bolts 40 made of synthetic resin, but these may also be joined and integrated by adhesive.

Next, these display panels l, circuit boards 11.15.19
．． An example of how to assemble the apparatus shown in FIG. 1 with 23 and support 31 will now be described.

First, connect the terminals on the data lines of the wiring 4 of the six display panels 1 and the corresponding output terminals of the six drive circuits 13 of the first circuit board 11 as shown in FIG.
1, and similarly connect the terminals on the scan line and the corresponding output terminals of the six drive circuits 17 on the second circuit board 15 with wires to connect the six display panels l and one each. first,
Two sets of circuit boards connected to the second circuit board 11 and 15 are made.

Before or after this operation, or in parallel with this operation, the adjustment circuits 21.25 of the third and fourth circuit boards 19.23 are connected to the corresponding drive circuits 13.17.

1 set of circuit boards 11.15.19.23 signal lines 14.1
8.22.26 termination and another set of circuit boards 11.15.
19.23 and the starting ends of signal lines 14.18.22.26 are connected.

Next, place the circuit board 11.15.19.23 on the support 31 at 4
The display panel 1 is fitted into each groove 35 separately, and the display panel 1 is placed between the legs 6.6 of the holding frame 9, with the support 31 being sandwiched between the legs 6. 31
Attach to.

The above work is carried out on a table or the like without being disturbed by anything other than the legs 6, 6. The electrodes 37 of the two sets of assemblies are connected to the power supply rod 51 made of a flat bar, and the electrodes 38 is coupled to a ground rod 52, which also consists of a flat bar.

These are built into the casing with the surface of the board 2 exposed, and the starting ends of signal lines 14, 18, 22, and 26 are connected to an electronic controller consisting of a microcomputer installed externally to receive clock signals, serial signals, and latches. Lighting pattern data is applied to the data line by a signal or the like, and the operation of lighting on the scan line corresponding to the pattern is repeated to display the required information on the display panel 1.

Incidentally, a fan is provided in the casing so that air flows between the ventilation holes 8 and the fins 36 of the holding frame 9 for cooling. In addition, if the device is long in the horizontal direction, use circuit boards 11, 15, 19, 23 and supports 31 corresponding to the length, or construct a plurality of these by arranging them horizontally, and if the device is long in the vertical direction, A large number of supports 31 may be arranged vertically, or the supports 31 may be placed vertically.

Furthermore, there are various means for attaching one display panel l to the support body 31, such as using screws, but when using a clamp-type holding frame 9 as shown in the figure, the substrate 2 can be attached by adjusting the clamping depth. The support body 31 can be easily aligned on one plane, and the legs 6.6 have spring properties.
A strong installation can be achieved by applying pressure.

Furthermore, if the support body 31 has a structure in which conductive plate members 32 having protrusions 33 and insulating members 34 are alternately arranged as shown in the figure, the support body 3 has an arbitrary number of mutually insulated grooves 35.
1 can be easily obtained.

Furthermore, since the drive circuits 13.17 are separated from the display panel 1, it is possible to make a plurality of drive circuits 13.17 correspond to one display panel 1 without having to make them correspond to each other. . If you do this, for example, 16X
The brightness of the display panel 1 with a high number of dots can be increased by connecting two drive circuits 13.17 each with eight output terminals to the 16-dot matrix display panel 1 to reduce the lighting time to 1/8 duty. can be measured.

[Effects of the Invention] According to the present invention, the data line and scan line drive circuits are separated from the display panel, a plurality of them are provided on separate circuit boards, and a support is provided with mutually insulated grooves. Since the display panel and circuit board are assembled to the body, the connection between the display panel and the drive circuit and other wiring can be made independently of the support, and the circuit board can be easily fitted into the groove. The display panel can be removed and attached to and removed from the support only from the front side of the support, making it extremely easy to construct a display device consisting of a large number of display panels, and even if the display element deteriorates or is damaged, the display remains Coupled with the fact that only the panel needs to be replaced, it is also advantageous in terms of maintenance. In addition, since cooling fins are provided on the support and one of them is used as an electrode, not only can the drive circuit fitted in the groove be efficiently cooled, but the power supply and grounding circuit structure can be simplified. be.

Furthermore, when the display panel is provided with a clip-in holding frame, it can be easily attached to and removed from the support, and the substrates can be easily aligned on one plane. When the insulating members are arranged alternately, it is possible to easily obtain a support having an arbitrary number of mutually insulated grooves.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an embodiment of the device according to the present invention;
2 is an enlarged vertical sectional partial view of FIG. 1, FIG. 3 is a schematic front view of the circuit board, FIG. 4 is an exploded perspective partial view of the support, and FIG. 5 is a schematic sectional view of the conventional example. 1...Display panel, 2...Substrate, 3...Display element. 4...Wiring, 9...Holding frame, +1.15,! 9,
23...Circuit board, 13.17...Drive circuit, 31.
... Support body, 32 ... Conductive plate material, 33 ... Projection, 3
4... Insulating member, 35... Groove, 36... Fin,
37.38... Electrode, 51... Power rod, 52...
Ground rod, Figure 2

Claims (1)

[Claims] 1. A plurality of display panels in which display elements are arranged in a grid pattern on the front surface of a substrate and wiring is provided in a matrix on the back surface; and a plurality of data line drive circuits. a first circuit board provided with a plurality of scan line drive circuits; and a second circuit board provided with a plurality of scan line drive circuits; a plurality of grooves parallel to each other and insulated; and at least one support having a corrugated fin protruding from the conductive plate and one of which forms an electrode; are attached to the support body side by side in one direction, and the first and second circuit boards are fitted into the grooves separately. 2. Display elements are arranged in a grid pattern on the front surface of the board, and wiring is provided in a matrix on the back surface.
and a plurality of display panels each having a holding frame provided on the back side of the substrate; and at least one each of a first circuit board, a second circuit board, and a support having the structure according to claim 1; 2. A matrix type variable display device, wherein the display panels are arranged in one direction and attached to the support by holding frames sandwiching the support. 3. A plurality of display panels configured as claimed in claim 1, at least one each of a first circuit board and a second circuit board; a plurality of conductive plates having a protrusion on one side edge; and a plurality of flat plates. a plurality of grooves formed by alternately arranging insulating members parallel to each other and insulated, and one longitudinal side of which is closed by the protrusion; at least one support having corrugated fins forming electrodes; and the display panel is attached to the support in a unidirectional alignment, and the first and second circuit boards are attached to the support. A matrix type variable display device characterized in that the display device is configured to be fitted into each groove individually.