JP6096848B2 - Flexible LED display and manufacturing method of flexible LED display - Google Patents

Description

  The present invention relates to a flexible LED display, which is a base for forming a grid-like LED light emitter, and a method for manufacturing a grid-like flexible LED display.

  Conventionally, as a display device in which LEDs are arranged in a grid pattern, a strip-like printed wiring board with LED pair chips attached is transparent at a predetermined interval so that it can be displayed without impairing lighting such as windows and glass doors. A technique has been proposed in which a light transmitting portion is provided between printed wiring boards by attaching and electrically connecting to a supporting board (see, for example, Patent Document 1).

Japanese Patent Application No. 8-36367

  However, in the case of a display like patent document 1, since the part in which the LED chip of a strip-like printed wiring board is not mounted is visible from the front, there was a subject that the transparency of the back was low.

  The present invention has been made to solve the above-described problems, and provides a single grid-like flexible LED display having a high rear side transparency.

  In order to solve the above problems, a flexible LED display according to the present invention is a dot matrix type flexible LED display constituted by a planar wiring board, each of which includes a plurality of side-emitting LED chips. A plurality of row-direction wiring board portions that are arranged in the row direction in the wiring board and that connect the first electrodes of the LED chips, and adjacent LED rows that are adjacent in the column direction between the row-direction wiring board portions. In order to connect the second electrodes, each includes a plurality of column-direction wiring board portions provided independently, and each of the column-direction wiring board portions has a notch so as to form a U-shape. And each end portion of the U-shape is partially connected to the adjacent row-direction wiring board portion in the row direction, and the row-direction wiring when bent along the U-shape. Vertically wiring board portion in the plate portion is formed, from one direction Te than one in which the side surface of the wiring substrate has a structure that looks in a grid pattern.

  Further, in the present invention, a dot matrix type flexible LED display composed of a planar wiring board, each of which is arranged with a plurality of side-emitting LED chips in the row direction in the wiring board, Between the plurality of row-direction wiring board portions connecting the first electrodes of the LED chips and the adjacent row-direction wiring board portions, the wiring of the first electrodes and the second electrodes of the plurality of LED chips A plurality of column-direction wiring board portions provided with wirings for connecting each other, each of the column-direction wiring board portions including a first substrate portion connected to the upper row-direction wiring board portion, and a lower portion A third substrate portion having a cut portion between the second substrate portion connected to the row direction wiring substrate portion and the upper and lower row direction wiring substrate portions between the first and second substrate portions; The first substrate portion; The column-direction wiring board portion is formed above the row-direction wiring board portion above the column-direction wiring board portion, and the first substrate portion is located above the column-direction wiring board portion. Is shifted in the row direction by a width in the row direction connected to the row direction wiring substrate portion, and the lower row direction wiring substrate portion is further in the row direction with respect to the column direction wiring substrate portion. The column direction wiring board portion is shifted by the width in the row direction of the substrate portion, and the row direction when the boundary portion of the first substrate portion and the second substrate portion connected to the row direction wiring substrate portion is bent. A flexible LED display having a structure in which a wiring board part perpendicular to the wiring board part is formed and the side surface of the wiring board can be seen in a lattice shape from one direction is provided.

  In the present invention, a plurality of side-emitting LED chips are arranged in the row direction, and a plurality of row-direction wiring board portions connecting the first electrodes of the LED chips are connected to each other in the row direction. In order to connect the second electrodes of the LED chips adjacent in the column direction between the wiring substrate units, each of the column direction wiring substrate units includes a plurality of column direction wiring substrate units provided independently of each other. However, a planar wiring board having a cut portion so as to form a U-shape and each end portion of the U-shape being partially connected to the adjacent row-direction wiring board portion in the row direction is manufactured. And forming a wiring board portion perpendicular to the row-direction wiring board portion by bending along the U-shape so that the side surface of the wiring board can be seen in a lattice shape from one direction; With Method of manufacturing a flexible LED indicator is provided.

  Further, in the present invention, each of the plurality of side-emitting LED chips is arranged in the row direction in the wiring board, and adjacent to the plurality of row-direction wiring board portions connecting the first electrodes of the LED chips. A plurality of column-direction wiring board portions provided with wirings for connecting the wirings of the first electrodes and the second electrodes of the plurality of LED chips between the row-direction wiring board portions; Each of the column-direction wiring board portions includes a first substrate portion connected to the upper row-direction wiring substrate portion, a second substrate portion connected to the lower row-direction wiring substrate portion, and the first and second A third substrate portion having a cut portion between the upper and lower row-direction wiring substrate portions between the substrate portions, and provided adjacent to the opposite side of the first substrate portion to the third substrate portion. The column-direction wiring board portion is composed of a notch hole portion, The first substrate portion is shifted in the row direction by a width in the row direction connected to the row direction wiring substrate portion above the row direction wiring substrate portion above the row direction wiring substrate portion. A step of creating a planar wiring board that is shifted in the row direction by a width in the row direction of the third substrate part with respect to the column direction wiring board part; and the column direction wiring board part, By bending a boundary portion of the first substrate portion and the second substrate portion that is connected to the row direction wiring substrate portion, a wiring substrate portion perpendicular to the row direction wiring substrate portion is formed. And a method of manufacturing a flexible LED display, comprising: making a side surface of the wiring board look like a grid.

  The flexible LED display of the present invention configured as described above includes a column-direction wiring board provided between a plurality of row-direction wiring board portions in which a plurality of side-emitting LED chips are arranged in the row direction in the wiring board. Since the configuration is such that only the end face of the wiring board and the side-emitting LED chip can be seen from the front by bending the part into a plurality of parts, a flexible LED display with a high backside transparency can be realized.

It is a surface view when components are mounted in the flexible wiring board used for the flexible LED display which shows Embodiment 1 of this invention. It is a reverse view when components are mounted in the flexible wiring board used for the flexible LED display which shows Embodiment 1 of this invention. It is the surface view which expanded and showed the upper left 3 row x 2 column part in the flexible wiring board shown in FIG. FIG. 4 is a substantial wiring diagram of the flexible wiring board in the upper left 3 rows × 2 columns portion shown in FIG. 3. It is a lighting control circuit diagram of the flexible LED display which concerns on Embodiment 1 and 2 of this invention. 6 is a time chart for schematically explaining the circuit operation of FIG. 5. It is the front view which showed the flexible wiring board after the end of a bending process as a whole. FIG. 4 is a perspective view showing a bending process (No. 1) in the upper left 3 rows × 2 columns portion shown in FIG. 3. FIG. 4 is a perspective view showing a bending step (part 2) in the upper left 3 rows × 2 columns portion shown in FIG. 3. It is the front view which showed the flexible wiring board at the time of completion | finish of the bending process in the upper left 3 row x 2 column part shown in FIG. FIG. 8 is a front view showing a state in which a flexible LED display is configured by fitting the flexible wiring board after the bending process shown in FIG. 7 into a transparent housing. It is the figure which expanded and showed the upper left part of transparent housing | casing itself shown in FIG. It is the figure which showed the flexible LED display which inserted the flexible wiring board in the transparent housing | casing shown in FIG. It is a surface figure when components are mounted in the flexible wiring board used for the flexible LED display which shows Embodiment 2 of this invention. It is a figure which shows the back side of the flexible wiring board surface shown in FIG. It is a figure which expands and shows the upper left 3 row x 2 column part of the flexible wiring board shown in FIG. FIG. 17 is a substantial wiring diagram in the upper left 3 rows × 2 columns portion of the flexible wiring board shown in FIG. 16. It is the perspective view which showed the bending process (the 1) in the upper left 3 row * 2 column part shown in FIG. It is the perspective view which showed the bending process (the 2) in the upper left 3 row * 2 column part shown in FIG. It is a surface view when components are mounted in the flexible wiring board used for the flexible LED display which shows Embodiment 3 of this invention. It is a figure which expands and shows the upper left 3 row x 2 column part of the flexible wiring board shown in FIG. FIG. 22 is a substantial wiring diagram in the upper left 3 rows × 2 columns portion of the flexible wiring board shown in FIG. 21. It is the perspective view which showed the bending process (the 1) in the upper left 2 rows x 2 column part shown in FIG. It is the perspective view which showed the bending process (the 2) in the upper left 2 rows * 2 column part shown in FIG. It is a surface view when components are mounted in the flexible wiring board used for the flexible LED display which shows Embodiment 4 of this invention. It is a figure which expands and shows the upper left 3 rows x 2 columns part of the flexible wiring board shown in FIG. FIG. 27 is a substantial wiring diagram in the upper left 3 rows × 2 columns portion of the flexible wiring board shown in FIG. 26. It is the perspective view which showed the bending process (the 1) in the upper left 2 rows x 2 column part shown in FIG. It is the perspective view which showed the bending process (the 2) in the upper left 2 rows * 2 column part shown in FIG. It is a surface figure when components are mounted in the flexible wiring board used for the flexible LED display which shows Embodiment 5 of this invention. It is the surface view which expanded and showed the upper left 3 row x 2 column part in the flexible wiring board shown in FIG. FIG. 32 is a substantial wiring diagram of the flexible wiring board in the upper left 3 rows × 2 columns portion shown in FIG. 31. It is the front view which showed the flexible wiring board after the end of a bending process as a whole. FIG. 32 is a perspective view showing a bending step (No. 1) in the upper left 3 rows × 2 columns portion shown in FIG. 31; FIG. 32 is a perspective view showing a bending step (No. 2) in the upper left 3 rows × 2 columns portion shown in FIG. 31. FIG. 32 is a front view showing the flexible wiring board at the end of the bending step in the upper left 3 rows × 2 columns portion shown in FIG. 31. It is a front view which shows the state which inserted the flexible wiring board after completion | finish of the bending process shown in FIG. 33 in the transparent housing | casing, and comprised the flexible LED display. It is the figure which expanded and showed the upper left part of the transparent housing | casing itself shown in FIG. It is the figure which expanded the upper left part of FIG. 37, and is the figure which showed the flexible LED display which inserted the flexible wiring board in the transparent housing | casing shown in FIG.

  Hereinafter, embodiments of the flexible LED display according to the present invention will be described in detail with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 shows a surface when a component is mounted on a flexible wiring board 100 as a flat wiring board used in the flexible LED display showing Embodiment 1 of the present invention. The flexible wiring board 100 is made of polyimide. A pad for component mounting and a conductor foil for wiring are formed on the surface of the base material, and an insulating material is then applied to portions other than the portion to which the component or the like is soldered.

The flexible wiring board 100 has a plurality of (eight in the illustrated example) LED chips 200a mounted in the row direction (horizontal direction) on the XY plane, and an odd number of the plurality of rows (eight in the illustrated example). This is implemented for each row or even row (odd row in the illustrated example). This flexible wiring board 100 is provided with a notch 110 which will be described later, and a tear prevention hole 120 which prevents the flexible wiring board 100 from being torn in a bending process which will be described later at an end point or a corner thereof. ing. As will be described later, the LED chip 200a is electrically connected in a lattice shape (matrix shape), and the electrical input / output thereof is performed via the connector 300.
In this figure, a dot matrix flexible LED display of 8 rows × 8 columns is described as an example, but it may be 16 rows × 16 columns or 24 rows × 24 columns.

FIG. 2 shows a state in which the flexible wiring board 100 shown in FIG. 1 is viewed from the back side. For each intermediate row (even rows in the illustrated example) of the LED chips 200a mounted in the row direction of FIG. As in the example of FIG. 1, eight LED chips 200b are mounted in one row.
Therefore, when the LED chip 200a mounted on the front surface of FIG. 1 and the LED chip 200b mounted on the back surface of FIG. 2 are combined, 8 × 8 LED chips are mounted on the flexible wiring board 100.

  In the enlarged view of the upper left 3 rows × 2 columns portion of the flexible wiring board 100 of FIG. 1 shown in FIG. In the example of this figure, two LED chips 200a are provided. In the even-numbered row, two side-emitting LED chips 200b are provided on the back surface shown in FIG. Since it is on the back side, it is indicated by a dotted line.

  In the column direction, the column direction wiring board portions 140 are provided in two columns. The column-direction wiring board portion 140 performs wiring connection between the LED chips independently between the row-direction wiring board portions 130 adjacent in the row direction and in the region between the LED chips 200a-200b adjacent in the column direction. The notch 110 is formed so as to form a U-shape.

Each of the column-direction wiring board portions 140 is connected to the row-direction wiring board portions 130 adjacent to each other in the column direction with a predetermined width in the column direction, and is bent along the U-shape. As a result, a flexible wiring board portion perpendicular to the row-direction wiring board portion 130 is formed, so that the side surface or the end face of the flexible wiring substrate 100 looks like a lattice from one direction.
The substantial wiring diagram of the upper left 3 rows × 2 columns portion in FIG. 4 shows that the row direction wiring board portion 130 and the column direction wiring board portion 140 electrically form a dot matrix.

  That is, the cathode (cathode) of the LED chip 200a in the first row is connected to the cathode of the LED chip 200b on the back surface of the second row as shown by a solid line, and further, the cathode of the LED chip 200a on the surface of the third row. And are thus wired in the column direction. The anode (anode) of the LED chip 200a in the first row is connected to the anode of the LED chip 200a in the same first row, as shown by the dotted line, and the next LED chip 200a in the first row not shown in the figure. It is connected. Similarly, the anodes of the LED chips 200b in the second row on the back surface are connected to each other, and the anodes of the LED chips 200a on the surface in the third row are connected in the same manner. The anode and the cathode are the first and second electrodes, respectively, or conversely, the second and first electrodes may be used.

In this manner, the anodes of the LED chips 200a and 200b are connected in the row direction and the cathodes are connected in the column direction. As a result, a dot matrix for lighting control as shown in FIG. 5 is formed. Will be.
The LED chips 200a and 200b are controlled to be turned on by the FETs 1 to 8 and the constant current transistor module 550 controlled by the lighting control unit 500 via the connector 300 and the flexible cable 400.

A schematic operation of the lighting control unit 500 of FIG. 5 will be described with reference to a time chart of FIG. Here, the description is limited to the LED chips a to e shown in FIG.
While the lighting controller 500 issues an ON command to the FET 1 and outputs the S01 signal (H), the constant current transistor module 550 receives the D01 ON (L) signal, D02, D03 OFF (H) signal. The LED chip a is turned on.

  Next, while the lighting control unit 500 issues an ON command to the FET 2 and outputs the S02 signal (H), the constant current transistor module 550 receives the D01 OFF (H) signal, D02, D03 ON (L). A signal is output, and the LED chips b and c are turned on.

Next, while the lighting control unit 500 issues an ON command to the FET 3 and outputs the S03 signal (H), the constant current transistor module 550 receives the D01, D03 ON (L) signal, and D02 OFF (H). A signal is output, and the LED chips d and e are turned on.
Similarly, when the flexible LED display has m rows, the S04 to Sm signals are subsequently output, and when the flexible LED display has n columns, the D04 to Dn signals are output at the same timing as D01 to D03. Is output.

  The period from the output of the S01 signal until the output of the next S01 signal is one cycle, and this controls the turning on / off of all LED chips on the entire surface of the flexible LED display. In the case of a static display, the same cycle is repeated, and in the case of a moving display, the display is changed by exchanging data D01 to Dn every plural cycles.

This is generally referred to as a dynamic lighting method. In the case of an LED chip, if lighting control is performed at about 100 Hz or more (one cycle of 10 msec or less), flicker is not perceived by human eyes. is there.
In order to individually control lighting of m rows × n columns of flexible LEDs, m × n control circuits are required. However, since this dynamic lighting requires m + n control circuits, This method is almost adopted in the field.

  The overall configuration of the flexible LED display obtained by bending the flexible wiring board 100 on which such LED chips 200a and 200b are mounted is shown in FIG. 7. Hereinafter, the substrate side surface ( A bending process for obtaining a display device in which only the light emitting side surfaces of the LED chips 200a and 200b can be obtained will be described below. Here, the bending process shown in FIGS. 8 to 10 will be described below with reference to the same reference numerals 1 to 12 shown in FIG. In the drawings, the reference numerals enclosed in circles are indicated by reference numerals with () in the following description.

  First, since the flexible wiring board 100 shown in FIGS. 1 and 2 is provided with the notch portion 110, when it is pulled in the column direction (vertical direction in the figure), it is first bent (as shown in FIG. 8). ). That is, the U-shaped square portions (2) to (6) are bent little by little as shown in the figure between the horizontal portions (1) to (7) which are the row direction wiring board portions 130. Similarly, the rectangular portions (8) to (12) are slightly bent between the horizontal portion (7) and the horizontal portion below (the reference numeral is not shown).

  Then, as shown in FIG. 9, the square part (2) is completely bent 180 degrees, the square part (3) is bent 90 degrees with respect to the square part (2), and the square part (4) is further folded into the square part (3 ), The square part (5) is folded 180 degrees with respect to the square part (4) (in the example shown, it is not folded up to 180 degrees), and the square part (6) is a square part. It is bent 90 degrees with respect to (5) and 180 degrees with respect to the horizontal part (7). That is, all the square portions between the horizontal portions are bent 180 degrees.

Similarly, the square portions (8) to (12) are also bent between two adjacent horizontal portions (row-direction wiring board portion 130).
As a result, at the end of the bending process, as shown in FIG. 10, the column-direction wiring board portion 140 is supported in a state perpendicular to the row-direction wiring board portion 130 between the row-direction wiring board portions 130. .

Therefore, in this flexible LED display as viewed from the paper surface, only the side surfaces of the LED chips 200a and 200b and the side surface (end surface) of the flexible wiring substrate 100 can be seen, and the transparency is remarkably improved.
As a result, the entire flexible LED display has a surface shape as shown in FIG.

However, in this state, unless the column-direction wiring board part 140 is bonded with an adhesive or the like, it is unstable, and it is difficult to fix the shape as shown in FIG.
Therefore, it is preferable that the display shown in FIG. 7 is fitted and fixed in a groove 700 provided in the transparent casing 600 as shown in FIG. And by energizing such a flexible LED display via the flexible cable 400, desired characters and numbers can be displayed.

FIG. 12 is an enlarged view of the upper left portion of the overall transparent casing 600 shown in FIG. 11. FIG. 12 (1) is a front view, FIG. 12 (2) is a left side view, and FIG. A lower side view is shown.
FIG. 13 corresponds to the partially enlarged view of the transparent casing 600 shown in FIG. 12, and shows a state in which the flexible wiring board 100 is fitted.

  As described above, by fitting the flexible wiring board 100 after the bending process as shown in FIGS. 7 and 10 into the groove 700 provided in the transparent casing 600, a stable shape and performance can be obtained.

Embodiment 2. FIG.
In the first embodiment, the LED chips 200a and 200b are divided into odd rows and even rows in the flexible wiring board 100 and mounted on the front and back surfaces of the flexible wiring board 100. By increasing the fold in the direction once, all LED chips can be mounted on one side. Thereby, the mounting process of the LED chip is reduced from twice to once, and the manufacturing cost can be suppressed.

FIG. 14 shows the surface of the flexible wiring board 100 on which the LED chip 200a is mounted according to the second embodiment. In the row direction wiring board portion 130 in each row of the flexible wiring board 100, 8 in the illustrated example. The LED chip 200a is provided, and the column-direction wiring board part 140 is different from the first embodiment in that a notch part 150 is provided in the notch part 110 that forms the middle part of the U-shape. . The cutout hole 150 is a portion where the flexible wiring board 100 does not exist.
The reason why the notch hole 150 is provided in the notch 110 in this way is that the above-mentioned U-shape gives the width in the column direction to increase the number of times of bending in the column direction by one so that the LED chip 200a can be mounted on one side. It is.

FIG. 15 shows the back surface of the flexible wiring board 100 shown in FIG. 14, and it can be seen that the LED chip 200b is not provided.
FIG. 16 is an enlarged view of the upper left 3 rows × 2 columns portion in FIG. 14. In the row direction wiring board portion 130, two LED chips 200 a are provided. Further, in the column direction wiring board part 140, the notch hole part 150 is provided in the middle part of the U-shape as described above.

FIG. 17 shows a substantial wiring diagram of the upper left 3 rows × 2 columns portion shown in FIG. 16. The difference from the wiring diagram of FIG. 4 is that the notch hole portion 150 forms the above U-shape. It is only a point formed in the cut portion to be cut, and the anodes of the LED chips 200a are connected to each other in the row direction, and the cathodes of the LED chips 200a are connected to each other in the column direction.
The overall circuit diagram in the second embodiment is the same as that in FIG. 5 in the first embodiment.

A process of creating a flexible LED display in use from the flexible wiring board 100 according to the second embodiment having such a structure will be described with reference to FIGS.
FIG. 18 shows a state in which the flexible wiring board 100 in the second embodiment shown in FIG. 14 is pulled up and down to expand the notch 110 and the notch hole 150 (not shown), and is shown in FIG. This corresponds to the first embodiment, but differs from the first embodiment in that the U-shaped portion is composed of six square portions (2) to (7) as shown in FIG. is there.

That is, the square portions (2) to (7) are sequentially bent as shown in FIG.
In FIG. 19, first, the square part (2) is bent 180 degrees with respect to the horizontal part (1) which is the row wiring board part 130, and the square part (3) is bent 90 degrees with respect to the square part (2). Further, after folding the square part (4) into the square part (3) 180 degrees, the square part (5) is folded 180 degrees with respect to the square part (4), and the square part (6) is further folded into the square part (5). The square part (7) is bent 90 degrees with respect to the square part (6), and finally the square part (7) is bent 180 degrees with respect to the horizontal part (8).

As a result, also in the second embodiment, the column-direction wiring board portion 140 is bent at a right angle to the row-direction wiring board portion 130 in the same manner as in FIG. Can be connected.
Therefore, by fitting the flexible wiring board 100 after such a bending process into the groove 700 of the transparent casing 600 as shown in FIG. 11, the second embodiment also has the same flexibility as the first embodiment. An LED display can be obtained.

Embodiment 3 FIG.
FIG. 20 shows a surface view when components are mounted on the flexible wiring board 100 used in the flexible LED display showing Embodiment 3 of the present invention. The flexible wiring board 100 of the third embodiment is obtained by changing the cutout hole 150 to a cutout hole 150a having a different shape and arrangement position from the flexible wiring board 100 of the second embodiment. Since this is the same as that of the second embodiment, redundant description is omitted.

  In other words, the cutout hole 150 of the flexible wiring board 100 of the second embodiment is provided in a rectangular shape inside the U-shape, but in the third embodiment, each of the column-direction wiring board parts 140 described above is provided. One of the portions (lower portion) connected to the row direction wiring board portion 130 with a predetermined width in the row direction further has a notch hole 150a having a predetermined width in the column direction. The notch hole 150a is formed outside the U-shape in an L-shape combining a rectangular space having a predetermined width in the column direction and a rectangular space in the column direction connected to the rectangle. .

The reason why such a notch 150a is provided is to provide a width in the column direction in which the number of bendings in the column direction is increased by one in order to make it possible to mount the LED chip on one side.
This will be described in more detail below.

  The outer dimensions of the flexible LED display are changed depending on the application used, and the dimensions between the adjacent LED chips 200a are also changed accordingly. Here, for example, when the dimension in the row direction of the flexible wiring substrate 100 of the second embodiment shown in FIG. 14 is to be doubled, the column direction also needs to be doubled. When considering the case where the flexible wiring board 100 is doubled only in the row direction in FIG. 16, the square portions (3) and (6) are extended, and as shown in FIG. 19, the flexible LED display is completed. This is because the vertical column dimension at the time becomes too large.

  On the other hand, in the case of the flexible wiring board 100 according to the third embodiment, even if the dimension in the row direction is doubled, it can be applied without any problem even if the same dimension is maintained without having to double the column direction. it can. Considering the case where only the row direction is doubled in FIG. 21, the rectangular portions (3) and (5) are not excessively stretched by increasing the width of the rectangular shape in the column direction of the notch hole 150a. This is because the dimension in the column direction when the flexible LED display is completed can be adjusted. In this manner, the flexible wiring board 100 of the third embodiment is more flexible in layout design than the flexible wiring board 100 of the second embodiment.

  In the flexible wiring board 100 according to the second embodiment, it is necessary to increase the width in the row direction of the row direction wiring board 130 as the dimension between the LED chips 200a increases. For this reason, as a result, the depth dimension when the flexible LED display is completed becomes large. However, the row direction width of the row direction wiring board portion 130 of the flexible wiring board 100 of the third embodiment has such a restriction. There is no receiving.

Hereinafter, details of the flexible wiring board 100 of the third embodiment will be described in comparison with the flexible wiring board 100 of the second embodiment.
FIG. 20 shows the surface of the flexible wiring board 100 on which the LED chip 200a is mounted according to the third embodiment. In the row direction wiring board portion 130 in each row of the flexible wiring board 100, eight LED chips 200a are provided in the illustrated example. Further, the column-direction wiring board part 140 is different from the first embodiment in that the above-described L-shaped cutout part 150a is provided outside the U-shape instead of inside the U-shape. The cutout hole 150a is a portion where the flexible wiring board 100 does not exist.

  FIG. 21 is an enlarged view of the upper left 3 rows × 2 columns portion in FIG. 20. In the row-direction wiring board portion 130, two LED chips 200 a are provided. In the column-direction wiring board portion 140, the notch hole portion 150a is provided on the outside of the U-shape as described above.

FIG. 22 shows a substantial wiring diagram of the upper left 3 rows × 2 columns portion shown in FIG. 21. The difference from the wiring diagram of FIG. 17 is that the notch hole portion 150a is structurally formed outside the U-shaped portion. The only difference is that the anodes of the LED chips 200a are connected to each other in the row direction, and the cathodes of the LED chips 200a are connected to each other in the column direction.
The overall circuit diagram in the third embodiment is similar to that in FIG. 5 in the first and second embodiments.

A process of creating a flexible LED display in use from the flexible wiring board 100 according to the third embodiment having such a structure will be described below with reference to FIGS.
FIG. 23 shows a state in which the cutout portion 110 and the notch hole portion 150a (not shown) are expanded by pulling the flexible wiring board 100 in the third embodiment shown in FIG. 20 in the vertical direction, that is, in the column direction. This corresponds to the second embodiment shown in FIG.

  First, in FIG. 24, the square part (2) is bent 180 degrees with respect to the horizontal part (1) which is the row wiring board part 130, and the square part (3) is bent 90 degrees with respect to the square part (2). . Further, after the square part (4) is bent 180 degrees with respect to the square part (3), the square part (5) is bent 180 degrees with respect to the square part (4). Further, the square part (6) is bent 90 degrees with respect to the square part (5), and the square part (7) is bent 180 degrees with respect to the square part (6). Finally, the square part (7) is bent 180 degrees with respect to the horizontal part (8).

Thus, also in the third embodiment, the column-direction wiring board portion 140 is bent at a right angle to the row-direction wiring board portion 130 as in FIG. 10 in the first and second embodiments, and adjacent row-direction wiring board portions. 130 can be connected.
Therefore, by fitting the flexible wiring board 100 after such a bending process into the groove 700 of the transparent casing 600 as shown in FIG. 11, the third embodiment is similar to the first and second embodiments. The flexible LED display can be obtained.

Embodiment 4 FIG.
FIG. 25 shows a surface view when components are mounted on the flexible wiring board 100 used in the flexible LED display showing Embodiment 4 of the present invention. The flexible wiring board 100 according to the fourth embodiment is merely different from the flexible wiring board 100 according to the third embodiment, except that the notch hole 150a is changed to a notch hole 150b having a different shape and arrangement position. Since the configuration is the same as that of the third embodiment, a duplicate description is omitted.

The cutout hole 150a of the flexible wiring board 100 of the third embodiment has an L shape with a horizontal rectangle below the U shape and a column shape rectangle on the right side of the U shape. The cutout hole 150b of the flexible wiring board 100 of aspect 4 is different only in that it has an inverted L shape with a horizontal rectangle on the upper side of the U shape and a rectangular shape on the right side of the U shape. The effect of the fourth embodiment is the same as that of the third embodiment.
That is, also in the fourth embodiment, as in the third embodiment, the U-shaped portion has a column width that increases the number of times of bending in the column direction by one so that the LED chip can be mounted on one side. A notch hole 150b is provided.

  Therefore, the cutout hole 150b is formed so that one of the portions connected to the adjacent row-direction wiring board portions in the row direction forms the above-described column-direction width in each of the column-direction wiring board portions. An inverted L-shape is provided outside the U-shape.

  FIGS. 25 to 29 showing the fourth embodiment correspond to FIGS. 20 to 24 showing the third embodiment, respectively, and the configuration and the assembling method are the same. .

Embodiment 5. FIG.
FIG. 30 is a surface view when components are mounted on a flexible wiring board 100 as a flat wiring board used in the flexible LED display showing Embodiment 5 of the present invention. Since only the shape is different from that of the flexible wiring substrate 100 of the above-described first to fourth embodiments, and the material, the mounted components, and the like are the same, redundant description is omitted.

  FIG. 31, which is an enlarged view of the upper left 3 rows × 2 columns portion of the flexible wiring board 100 of FIG. 30, includes three rows of row direction wiring board portions 130, and LED chips 200 a are included in each row. In the example of this figure, four each are provided. In this example, the row-direction wiring board portion 130 of the second row is arranged in a manner shifted in the row direction by the same dimension as the interval between the adjacent LED chips 200a with respect to the row-direction wiring board portion 130 of the first row. Between the row-direction wiring board portion 130 in the second row and the row-direction wiring board portion 130 in the first row, a rectangular column-direction wiring board portion 140a is disposed.

  FIG. 32 shows a substantial wiring diagram of the flexible wiring board in the upper left 3 rows × 2 columns portion shown in FIG. 31. The column-direction wiring board portion 140a has two cathodes (cathode) wiring of the LED chip 200a. Is passing.

  That is, each of the column direction wiring board portions 140a includes a first substrate portion (square portion (2)) connected to the upper row direction wiring substrate portion 130 (horizontal portion (1)) and the lower row direction wiring substrate. A first cut portion is provided between the second substrate portion (square portion (4)) connected to the substrate portion 130 and the upper and lower row-direction wiring substrate portions 130 between the first and second substrate portions. 3 substrate parts (square part (3)) and the notch hole part 150c provided adjacent to the said 1st board | substrate part on the opposite side to the said 3rd board | substrate part.

  The column direction wiring board part 140a is not limited to the above example of the shift between the wiring boards, but the first board part is located above the row direction wiring board above the row direction wiring board part 130. It only needs to be shifted in the row direction by the width in the row direction connected to the unit 130. Further, the lower row-direction wiring board portion 130 may be shifted in the row direction by the width in the row direction of the third substrate portion with respect to the column-direction wiring board portion 140a.

  Thus, in the first to fourth embodiments described above, the number of column-direction wiring board portions 140 between the row-direction wiring board portions 130 is the same as the number of LED chips 200a mounted on the row-direction wiring board portion 130. In contrast, the number of LED chips 200a mounted on the row-direction wiring board unit 130 can be reduced to half. Thereby, the partition in the column direction when the flexible LED display is completed is halved, and the transparency can be increased.

  FIG. 33 is a front view showing the entire flexible wiring board after the bending process, and it can be seen that the transparency rate is improved as compared with FIG.

  The process of creating a flexible LED display in use from the flexible wiring board 100 according to the fifth embodiment having such a structure will be described below with reference to FIGS.

  Since the flexible wiring board 100 shown in FIG. 31 is provided with the notches 110, when it is pulled in the row direction, that is, in the vertical direction in the figure, it first exhibits a bent state (part 1) as shown in FIG. . That is, between the square part (1) and the square part (5) constituting the row direction wiring board part 130, the square parts (2) to (4) constituting the column direction wiring board part 140a are as illustrated. The shape is bent little by little. This takes the form that the square part (5) and the square part below (not shown) are bent in the same manner.

  Then, as shown in FIG. 35, the square part (2) is completely bent 180 degrees with respect to the square part (1), and the square part (3) is bent 90 degrees with respect to the square part (2). Further, the square part (4) is bent 90 degrees with respect to the square part (3), and the square part (5) is bent 180 degrees.

  Similarly, it is also bent between two adjacent horizontal parts (row direction wiring board part 130) on the lower side.

  As a result, at the end of the bending process, as shown in FIG. 36, the row direction wiring board portion 140 a is perpendicular to the row direction wiring board portion 130 between the row direction wiring board portions 130. 130 will be supported.

  Therefore, in this flexible LED display viewed from the paper surface, only the side surface of the LED chip 200a and the side surface (end surface) of the flexible wiring substrate 100 can be seen, and the transparency rate is remarkably improved. As a result, the entire flexible LED display has a surface shape as shown in FIG.

  However, in this state, the column-direction wiring board portion 140a is unstable unless it is bonded with an adhesive or the like, and is difficult to fix in a shape as shown in FIG. Therefore, it is preferable that the display shown in FIG. 33 is fitted and fixed in a groove 700 provided in the transparent casing 600 as shown in FIG. And by energizing such a flexible LED display via the flexible cable 400, desired characters and numbers can be displayed.

  FIG. 38 is an enlarged view of the upper left portion of the overall transparent casing 600 shown in FIG. 37. FIG. 38 (1) is a front view, FIG. 38 (2) is a left side view, and FIG. A lower side view is shown. FIG. 39 corresponds to the partially enlarged view of the transparent casing 600 shown in FIG. 38 and shows a state in which the flexible wiring board 100 is fitted.

  In this manner, by fitting the flexible wiring board 100 after the bending process as shown in FIGS. 33 and 36 into the groove 700 provided in the transparent casing 600, a stable shape and performance can be obtained.

  The flexible wiring board 100 according to the fifth embodiment is shaped like a parallelogram with respect to the rectangular shape of the flexible wiring board 100 according to the first to fourth embodiments, and has the following effects.

  As is apparent from a comparison between FIG. 11 and FIG. 37, the partition in the column direction is halved and the transparency is increased. In the above description, an example in which the anode (cathode) wiring of two LED chips 200a is provided on the column-direction wiring board portion 140a has been described. However, three or more LEDs are provided on the column-direction wiring board portion 140a. By providing the cathode (cathode) wiring of the chip 200a, it is possible to further reduce the number of the column-direction wiring board portions 140a, and to further increase the transparency by reducing the partition in the column direction.

  The number of bends between two adjacent row-direction wiring board portions 130 is 6 in the first embodiment and 7 in the second to fourth embodiments, but is four in the fifth embodiment, so that the workability is improved. It can be seen that improves.

  The flexible wiring board 100 of each embodiment uses a polyimide base material, and a roll-shaped material can also be used. The flexible wiring board 100 has a shape like a parallelogram. However, in manufacturing, the slanted portions are made parallel and continuously arranged to reduce material efficiency. Can be manufactured without any problem.

  In the description of the flexible LED display of the first to fifth embodiments, the side-emitting LED chip 200a is disposed on one end surface side of the row-direction wiring board portion, and the display is visible from one direction. This is an example, and a side-view type LED chip 200a can be arranged on one end surface side and the other end surface side of the row-direction wiring board portion to form a display that can be seen from two directions (both sides). .

  DESCRIPTION OF SYMBOLS 100 Flexible wiring board; 110 Cutting part; 120 Tear prevention hole; 200a, 200b LED chip; 130 Row direction wiring board part; 140, 140a Column direction wiring board part; 150, 150a, 150b, 150c Notch hole part; 400 flexible cable; 500 lighting control unit; 550 constant current transistor module; 600 transparent housing; 700 groove.

Claims (14)

A dot matrix type flexible LED display composed of a planar wiring board,
A plurality of side-emitting LED chips are arranged in the row direction in the wiring board, and a plurality of row-direction wiring board portions connecting the first electrodes of the LED chips;
In order to connect the second electrodes of the LED chips adjacent in the column direction between the adjacent row direction wiring substrate units, each having a plurality of column direction wiring substrate units provided independently,
Each of the column-direction wiring board portions has a cut portion so as to form a U-shape, and each end portion of the U-shape is partially connected to the adjacent row-direction wiring board portion in the row direction. A flexible LED having a structure in which a wiring board portion perpendicular to the row-direction wiring board portion is formed when bent along the U-shape, and the side surface of the wiring board looks like a grid from one direction. display. The LED chip, the row every row direction wiring board unit, a flexible LED display device according to claim 1 are arranged alternately in front and back of the wiring substrate. The LED chip is disposed on one side of the wiring board in each row of the row direction wiring board unit,
The U-shape has a notch hole portion, and the notch hole portion is bent along the U-shape by giving a width in the row direction that increases the number of times of bending in the row direction by 1 than when there is no notch hole portion . The flexible LED display according to claim 1 , wherein the LED chips are evenly arranged in a dot matrix . The flexible LED display according to claim 3, wherein the notch hole portion is provided in the notch portion to form the width in the column direction. The notch hole is formed in the U-shape so that one of the portions connected to the adjacent row-direction wiring board portions in the row direction forms the column-direction width in each of the column-direction wiring board portions. The flexible LED display according to claim 3, wherein the flexible LED display is formed outside. A dot matrix type flexible LED display composed of a planar wiring board,
A plurality of side-emitting LED chips are arranged in the row direction in the wiring board, and a plurality of row-direction wiring board portions connecting the first electrodes of the LED chips;
A plurality of column-direction wiring board portions provided with wiring for connecting the wirings of the first electrodes and the second electrodes of the plurality of LED chips between the adjacent row-direction wiring board portions; ,
Each of the column-direction wiring board portions includes a first substrate portion connected to the upper row-direction wiring substrate portion, a second substrate portion connected to the lower row-direction wiring substrate portion, and the first and second A third substrate portion having a cut portion between the upper and lower row-direction wiring substrate portions between the substrate portions, and provided adjacent to the opposite side of the first substrate portion to the third substrate portion. With a notch hole
The column-direction wiring board portion is shifted in the row direction by a row-direction width where the first substrate portion is connected to the row-direction wiring board portion above the row-direction wiring board portion above the column-direction wiring board portion. The lower row direction wiring board portion is shifted further in the row direction with respect to the column direction wiring board portion by the width in the row direction of the third substrate portion,
The column-direction wiring board portion is formed with a wiring board portion perpendicular to the row-direction wiring board portion when a boundary portion connected to the row-direction wiring board portion of the first substrate portion and the second substrate portion is bent. Therefore, the flexible LED display has a structure in which the side surface of the wiring board can be seen in a lattice shape from one direction. The flexible LED according to any one of claims 1 to 6, wherein the first electrode is an anode or a cathode of the LED chip, and the second electrode is a cathode or an anode of the LED chip. display. The flexible LED display according to any one of claims 1 to 7, wherein a tear prevention hole is provided at an end of the cut portion.   The flexible LED display which inserted the flexible LED display as described in any one of Claims 1-8 in the groove | channel of the row direction and column direction of a transparent housing | casing. A plurality of side-emitting LED chips are arranged in the row direction, and a plurality of row-direction wiring board portions connecting the first electrodes of the LED chips are connected to the adjacent row-direction wiring board portions. In order to connect the second electrodes of the LED chips adjacent to each other in the direction, each of the column direction wiring board portions includes a plurality of column direction wiring board portions provided independently, and each of the column direction wiring board portions forms a U-shape. And a step of producing a planar wiring board having a notch portion and each end portion of the U-shape partially connected to the adjacent row direction wiring board portion in the row direction,
Forming a wiring board portion perpendicular to the row-direction wiring board portion by bending along the U-shape, so that the side surface of the wiring board can be seen in a lattice shape from one direction. Manufacturing method of flexible LED display. The LED chips are alternately arranged on the front surface and the back surface of the wiring board in every other row of the row direction wiring board portion, and are bent along the U-shape so that side surfaces of the front and back LED chips are arranged. The method for manufacturing a flexible LED display according to claim 10, wherein light emission is visible from the one direction. The LED chip is disposed on one side of the wiring board in each row of the row direction wiring board unit,
Wherein U has a cutout portion, the cutout portion is for providing the column width to increase once the column direction of bending times than when the cutout portion is not, bent along the U The manufacturing method of the flexible LED display of Claim 10. It was made for the side light emission of all the LED chips to be seen uniformly from the said one direction in the dot matrix form .   The manufacturing method of a flexible LED display further provided with the step which fits the flexible LED display as described in any one of Claims 10-12 in the groove | channel of the row direction and column direction of a transparent housing | casing. A plurality of side-emitting LED chips are arranged in a row direction in the wiring board, and a plurality of row-direction wiring board portions in which the first electrodes of the LED chips are connected to each other and the adjacent row-direction wiring board A plurality of column-direction wiring board portions provided with wirings for connecting the wirings of the first electrodes and the respective second electrodes of the plurality of LED chips between the sections; Each of the first substrate portion connected to the upper row direction wiring substrate portion, the second substrate portion connected to the lower row direction wiring substrate portion, and the upper and lower portions between the first and second substrate portions. A third substrate portion having a cut portion between the lower row direction wiring substrate portion and a notch hole portion provided adjacent to the opposite side of the first substrate portion to the third substrate portion; The column direction wiring board portion is configured in the row direction above The first substrate portion is shifted in the row direction by a width in the row direction connected to the row direction wiring substrate portion above the line substrate portion, and the row direction wiring substrate portion below is shifted in the column direction Creating a planar wiring board that is shifted in the row direction by a width in the row direction of the third substrate part with respect to the wiring board part;
Bending the column-direction wiring board portion to the row-direction wiring board portion of the first substrate portion and the second substrate portion to form a wiring board portion perpendicular to the row-direction wiring board portion And a step of making the side surface of the wiring board look like a grid from one direction.

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