TWI623092B - A flexible led display - Google Patents

Abstract

The invention adopts a flexible circuit design on a transparent flexible substrate, and changes the position of the conductive terminal on the back side of the monochrome LED or the full color LED, so that the single color LED or the full color LED can be applied to the transparent flexible substrate, and The invention utilizes the bridging technology to make the staggered lines can be isolated by the insulating layer, so that only a single layer substrate is needed, which not only solves the complicated wiring problem of the LED display, but also provides a high-density array of full-color LED displays, and can greatly save the process. And material costs.

Description

Flexible tactile diode display

This invention relates to a light emitting diode display, and more particularly to a flexible light emitting diode display.

In recent years, flexible displays that are lightweight and resistant to vibration have been developed, and are made of materials such as plastic. Since such a flexible display can be folded or rolled up, its portability is maximized. At the same time, such a flexible display can be applied to various fields, such as electronic billboards, window advertisements, bulletin boards of exhibition venues, and the like.

A conventional flexible display includes a display element formed on a flexible substrate. Among them, various types of display elements can be used in the flexible display, including an organic light emitting diode display device, a liquid crystal display device, an electrophoretic display (EPD) device, and the like. These types of display devices typically comprise a thin film transistor. Thus, to form a flexible display, the flexible substrate undergoes a number of thin film processes to form a thin film transistor. However, since the flexible substrate is generally relatively thin, about several tens of micrometers, it is difficult to perform several thin film processes separately on the flexible substrate. There is a method in which a flexible substrate is first formed on a glass substrate, a display element is formed on the flexible substrate, adhered to the glass substrate, and then the flexible substrate and the glass are The substrates are separated from one another and the method is used to perform a thin film process. a flexible substrate made of plastic material It usually has a coefficient of thermal expansion (CTE) that is different from the glass substrate. If the adhesion between the flexible substrate and the glass substrate is weak, the flexible substrate may be peeled off from the glass substrate and separated, or partially removed and bent during a high temperature process, which is flexible A fatal flaw can be caused in the process of the display. In addition, the current single-layer or double-layer transparent flexible LED display is limited to the use of single-color (dual-conductor terminal) LEDs due to limited circuit design, and full-color LEDs cannot be used to provide full-color display. The application of LED displays is still not universal.

In view of this, a full-color flexible display that is convenient in processing and can overcome the above disadvantages is highly anticipated by the industry. Therefore, the present invention can be applied to a transparent flexible substrate by using a flexible circuit design on a transparent flexible substrate, and changing the position of the conductive terminal on the back side of the monochrome LED or the full color LED. It can solve the complex wiring problem of LED display and provide a high-density full-color LED display. In addition, the present invention utilizes bridging technology to make the interleaved lines isolated by the insulating layer, so that only a single layer of substrate is required, which can greatly save process and material costs.

An object of the present invention is to disclose a flexible light emitting diode display comprising: a transparent flexible substrate having an opposite upper and lower surface; 3M rows of first flexible wires, N columns of second flexible wires Formed on the upper surface of the flexible substrate, the first flexible wires and the second flexible wires are staggered with each other and define M×N pixels, each of the pixels being i) row, (i+1)th row, (i+2)th row of the first flexible wires and the (j)th column of the second flexible wires are addressed, and M, N, i, j Are natural numbers, 1 i 3M-2,1 j a first insulating layer formed at each of the first flexible wires and each of the second flexible wires and sandwiched between each of the first flexible wires and each of the second wires Between the flexible wires, or covering each of the second flexible wires; a plurality of LED packages are respectively fixed in each of the pixels; and a first circuit includes a plurality of third a flexible wire, and each of the third wires is respectively connected to one of the first flexible wires; a second circuit includes a plurality of fourth flexible wires, and each of the fourth flexible wires are respectively connected One of the second flexible wires; wherein each of the first flexible wires comprises a plurality of first flexible sub-wires that are parallel, meshed or staggered with each other, and/or each of the second flexible wires The flexible wire includes a plurality of second flexible sub-wires that are parallel, meshed or staggered with each other; and a driving circuit electrically connected to the first circuit and the second circuit, respectively.

Another feature of the present invention is to disclose a flexible light emitting diode display as described above, wherein the material of the transparent flexible substrate comprises polyethylene terephthalate (PET) and polymethyl methacrylate (PMMA). , one or a combination of polyimine (PI), polycarbonate (PC), glass.

Another feature of the present invention is the flexible light emitting diode display as described above, wherein the materials of the first and second flexible wires comprise gold wire, silver wire, silver paste, copper wire, and nanometer. One of carbon tube, polydioxyethyl thiophene polystyrene sulfonic acid (PEDOT), nano silver or a combination thereof.

Another feature of the present invention is to disclose a flexible light emitting diode display as described above, wherein each of the first flexible wires, each of the second flexible wires, each of the third The flexible wire, and each of the fourth flexible wires are a single layer or a multilayer structure.

Another feature of the present invention is the flexible light emitting diode display as described above, wherein each of the third flexible wires comprises a plurality of third flexible elements that are parallel, meshed, or staggered with each other. The wires, and/or each of the fourth flexible wires, comprise a plurality of fourth flexible sub-wires that are parallel, meshed, or staggered with each other.

Another feature of the present invention is the flexible light emitting diode display as described above, wherein each of the light emitting diode packages emits red, green, blue light and a mixture thereof. .

Another feature of the present invention is to disclose a flexible light emitting diode display as described above, wherein each of the light emitting diode packages includes a plurality of light emitting diodes each capable of emitting red, green or blue light. Body unit.

Another feature of the present invention is to disclose a flexible light emitting diode display as described above, wherein each of the light emitting diode packages includes three light emitting diode units, and each of them can emit red light. A green or blue light emitting diode unit.

Another feature of the present invention is to disclose a flexible light emitting diode display as described above, wherein each of the light emitting diode packages is made of a conductive adhesive that can be cured at a temperature lower than 250 degrees Celsius. And/or an anisotropic glue (ACF) is immobilized within each of the pixels.

Another feature of the invention is the disclosure of a flexible light emitting diode display as described above, the first insulating layer comprising a single or multiple layers of insulating material.

Another feature of the present invention is to disclose a flexible light emitting diode display as described above, each of the light emitting diode packages including four independent first, second, third, and fourth a conductive terminal, and the second flexible wire of the (j)th column has a Connecting a first extension of the first conductive pad, the first flexible wire of the (i)th row has a second extension connected to a second conductive pad, and the first (i+1)th row The flexible wire has a fourth extension connected to a fourth conductive pad, and the first flexible wire of the (i+2)th row has a third extension connected to the third conductive pad, wherein the first conductive terminal Electrically connecting to the second flexible conductive strip of the (j)th column by being connected to the first conductive pad, the second conductive terminal being connected to the second conductive pad and the first row of the (i)th row The fourth conductive terminal is electrically connected to the first flexible wire of the (i+1)th row by being connected to the fourth conductive pad, and the third conductive terminal is connected to the third conductive terminal The third conductive pad is electrically connected to the first flexible wire of the (i+2)th row.

Another feature of the invention is the disclosure of a flexible light emitting diode display as described above, wherein the drive circuit comprises at least one drive IC.

Another feature of the present invention is the flexible light emitting diode display as described above, wherein the first flexible wire of the (i)th row is located on the left side of the light emitting diode package, and the The first flexible wire of the (i+1)th row and the first flexible wire of the (i+2)th row are located on the right side of the light emitting diode package.

Another feature of the present invention is to disclose a flexible LED display as described above, further comprising a third extension of a second flexible layer sandwiching the first flexible conductor of the (i+2)th row The intersection with the first flexible wire of the (i+1)th row.

Another feature of the invention is the disclosure of a flexible light emitting diode display as described above, the second insulating layer comprising a single or multiple layers of insulating material.

Another feature of the present invention is to disclose a flexible light-emitting diode display comprising: a transparent flexible substrate having an opposite upper and lower surface; 2A rows of first flexible wires, and 2B rows of second a flexible wire formed on the upper surface of the flexible substrate, the first flexible wires and the second flexible wires being staggered with each other and defining A×B pixels, each of the pixels including a first sub-pixel, which is formed by the first flexible wire of the (d)th row and the second flexible wire of the (e)th column; a second sub-pixel, by the (d+ 1) row the first flexible wires and the second flexible wires of the (e) column; a third sub-pixel, the first flexible wires and the first (d) E+1) the second flexible wires are addressed; a fourth sub-pixel, the first flexible wire from the (d+1)th row and the second (e+1)th column The flexible wire is addressed, wherein A, B, d, and e are natural numbers, 1 d 2A-1,1 e 2B-1, and each of the first flexible wires is composed of a plurality of first flexible sub-wires that are parallel, meshed or staggered with each other, and/or each of the second flexible wires is a plurality of second flexible sub-wires parallel to each other, meshed or staggered; a first insulating layer formed at each of the first flexible wires and each of the second flexible wires And being sandwiched between each of the first flexible wires and each of the second flexible wires, or covering each of the second flexible wires; and the plurality of first light-emitting diodes are respectively fixed Within each of the first sub-pixels; a plurality of second light-emitting diodes are respectively fixed in each of the second sub-pixels; and a plurality of third light-emitting diodes are respectively fixed to each of the second sub-pixels And a plurality of fourth light-emitting diodes respectively fixed in each of the fourth sub-pixels; a first circuit comprising a plurality of third flexible wires, and each of the plurality of pixels The third flexible wire is respectively connected to one of the first flexible wires; and the second circuit includes a plurality of fourth flexible wires, Each of the fourth flexible wires is respectively connected to one of the second flexible wires; wherein each of the first flexible wires comprises a plurality of first flexible sub-wires that are parallel, meshed or staggered with each other And/or each of the second flexible wires includes a plurality of second flexible sub-wires that are parallel, meshed or staggered with each other; and a driving circuit electrically connected to the first circuit and the second Circuit.

Another feature of the present invention is to disclose yet another flexible light emitting diode display as described above, wherein the transparent flexible substrate material comprises polyethylene terephthalate (PET), polymethyl ester (PMMA). , one or a combination of polyimine (PI), polycarbonate (PC), glass.

Another feature of the present invention is to disclose another flexible light-emitting diode display as described above, wherein the materials of the first and second flexible wires comprise gold wire, silver wire, silver paste, copper wire, and nai. One or a combination of a carbon tube, polydioxyethyl thiophene polystyrene sulfonic acid (PEDOT), nano silver.

Another feature of the present invention is to disclose a flexible light emitting diode display as described above, wherein each of the first flexible wires, each of the second flexible wires, each of the third The flexible wire, and each of the fourth flexible wires are a single layer or a multilayer structure.

Another feature of the present invention is the flexible light emitting diode display as described above, wherein each of the third flexible wires comprises a plurality of third flexible elements that are parallel, meshed, or staggered with each other. The wires, and/or each of the fourth flexible wires, comprise a plurality of fourth flexible sub-wires that are parallel, meshed, or staggered with each other.

Another feature of the present invention is to disclose another flexible light emitting diode display as described above, wherein the first light emitting diodes are red light emitting diode packages or flip chip red light emitting diodes Body wafer.

Another feature of the invention is to disclose yet another flexible illumination as described above A diode display, wherein the second light emitting diodes are green light emitting diode packages or flip chip green light emitting diode chips.

Another feature of the present invention is to disclose another flexible light emitting diode display as described above, wherein the third light emitting diodes are blue light emitting diode packages or flip chip blue light emitting diode chips. .

Another feature of the present invention is to disclose another flexible light emitting diode display as described above, wherein the fourth light emitting diodes are yellow light emitting diode packages or flip chip yellow light emitting diodes. Body wafer.

Another feature of the present invention is to disclose another flexible light emitting diode display as described above, wherein the fourth light emitting diodes are white light emitting diode packages or flip chip white light emitting diode chips. .

Another feature of the present invention is to disclose yet another flexible light emitting diode display as described above, wherein each of the first, second, third or fourth light emitting diodes is at a temperature A conductive paste that is cured below 250 degrees Celsius and/or an anisotropic glue (ACF) is respectively fixed in each of the first, second, third, and fourth sub-pixels.

Another feature of the present invention is to disclose yet another flexible light emitting diode display as described above, the first insulating layer comprising a single or multiple layers of insulating material.

Another feature of the present invention is to disclose another flexible light emitting diode display as described above, wherein each of the first light emitting diodes comprises two independent fifth and sixth conductive terminals. And the second flexible wire of the (e)th column has a fifth extension connected to a fifth conductive pad, and the first flexible wire of the (d)th row has a sixth connection to a sixth conductive pad. An extension portion, and the fifth conductive terminal of each of the first light emitting diodes The sixth conductive terminal of each of the first light emitting diodes is electrically connected to the second conductive wire of the (e)th column by being in contact with the fifth conductive pad, and the sixth conductive terminal of each of the first light emitting diodes The pad contacts and is electrically connected to the first flexible wire of the (d) row; each of the second light emitting diodes comprises two independent seventh and eighth conductive terminals, and the The second flexible wire of the column has a seventh extension connected to a seventh conductive pad, and the first flexible wire of the (d+1)th row has an eighth extension connected to an eighth conductive pad, And the seventh conductive terminal of each of the second LEDs is electrically connected to the second flexible wire of the (e)th column by contacting the seventh conductive pad, each of the second The eighth conductive terminal of the light emitting diode is electrically connected to the first flexible wire of the (d+1)th row by contacting the eighth conductive pad; each of the third light emitting diodes Each includes two independent ninth and tenth conductive terminals, and the second flexible wire of the (e+1)th column has a ninth extension connecting a ninth conductive pad, the (d)th row of A flexible wire has a tenth extension connected to a tenth conductive pad, and the ninth conductive terminal of each of the third light emitting diodes is in contact with the ninth conductive pad The second flexible wires of the +1) column are electrically connected, and the tenth conductive terminal of each of the third light emitting diodes is in contact with the tenth conductive pad and the first (d) row a flexible wire is electrically connected; each of the fourth light emitting diodes comprises two independent eleventh and twelfth conductive terminals, and the second flexible wire of the (e+1)th column Having an eleventh extension connecting an eleventh conductive pad, the first flexible wire of the (d+1)th row has a twelfth extension connecting a twelfth conductive pad, and each of the And the eleventh conductive terminal of the fourth light emitting diode is electrically connected to the second flexible wire of the (e+1)th column by contacting the eleventh conductive pad, each of the fourth The twelfth conductive terminal of the light emitting diode is in contact with the twelfth conductive pad and the first flexible guide of the (d+1)th row Wire electrical connection.

Another feature of the present invention is to disclose yet another flexible light emitting diode display as described above, wherein the drive circuit comprises at least one drive IC.

100, 100', 200, 300‧‧‧ flexible LED display

110,310‧‧‧Transparent flexible substrate

110A, 310A‧‧‧ upper surface

120A, 120B, 120C; 320A, 320B‧‧‧ first flexible wire

120’, 320’‧‧‧ first flexible wire

120A1‧‧‧Second extension

120B1‧‧ Third extension

120C1‧‧ Fourth Extension

125, 325‧‧‧ first insulation

126‧‧‧Second insulation

130, 330A, 330B‧‧‧ second flexible wire

130’, 330’‧‧‧second flexible thread

131‧‧‧First Extension

140A, 340A‧‧‧ first circuit

140A’, 340A’‧‧‧ third flexible conductor

140A", 340A" ‧‧‧ third flexible wire

140B, 340B‧‧‧ second circuit

140B’, 340B’‧‧‧ fourth flexible wire

140B", 340B" ‧‧‧ fourth flexible wire

145A‧‧‧First conductive pad

145B‧‧‧Second conductive pad

145C‧‧‧3rd conductive pad

145D‧‧‧fourth conductive pad

150, 350‧‧ ‧ pixels

150A, 350A‧‧‧ first sub-pixel

150B, 350B‧‧‧ second sub-pixel

150C, 350C‧‧‧ third sub-pixel

350D‧‧‧ fourth sub-pixel

155, 355‧‧‧ conductive adhesive

160‧‧‧Light Emitter Package

160A‧‧‧First conductive terminal

160B‧‧‧Second conductive terminal

160C‧‧‧third conductive terminal

160D‧‧‧fourth conductive terminal

180, 380‧‧‧Flexible printed circuit boards

190, 390‧‧‧ drive IC unit and control circuit unit module

320A1‧‧‧ sixth extension

320A2‧‧‧ Tenth Extension

320B1‧‧‧8th extension

320B2‧‧‧Twelfth extension

330A1‧‧‧ Fifth Extension

330A2‧‧‧ seventh extension

330B1‧‧‧Ninth Extension

330B2‧‧11 eleventh extension

345R1‧‧‧5th conductive pad

345R2‧‧‧ sixth conductive pad

345G1‧‧‧ seventh conductive pad

345G2‧‧‧8th conductive pad

345B1‧‧‧Ninth conductive pad

345B2‧‧‧10th conductive pad

345Y1‧‧‧Eleventh conductive pad

345Y2‧‧‧12th conductive pad

360A‧‧‧First Light Emitting Diode

360A1‧‧‧ fifth conductive terminal

360A2‧‧‧ sixth conductive terminal

360B‧‧‧Second light-emitting diode

360B1‧‧‧ seventh conductive terminal

360B2‧‧‧8th conductive terminal

360C‧‧‧3rd LED

360C1‧‧‧Ninth conductive terminal

360C2‧‧‧10th conductive terminal

360D‧‧‧4th LED

360D1‧‧‧Eleventh conductive terminal

360D2‧‧‧12th conductive terminal

1A to 1M are top and cross-sectional views of a flexible light-emitting diode display according to a first embodiment of the present invention; and FIGS. 2A-2M are top views and cross-sections of a flexible light-emitting diode display according to a second embodiment of the present invention; Figure.

The manner of making and using the embodiments of the present invention will be described in detail below. It should be noted, however, that the present invention provides many inventive concepts that can be applied in various specific forms. The specific embodiments discussed herein are merely illustrative of specific ways of making and using the invention, and are not intended to limit the scope of the invention.

First, please refer to FIG. 1A, which shows a top view of a flexible LED display 100 in accordance with an embodiment of the present invention. As shown in FIG. 1A, the LED display 100 includes a transparent flexible substrate 110, which may be selected from the group consisting of polyethylene terephthalate (PET), polymethyl acrylate (PMMA), and polyphthalate. The first transparent flexible substrate 110 of the present embodiment is composed of flexible polyethylene terephthalate (PET), one or a combination of amine (PI), polycarbonate (PC), and glass.

The upper surface 110A of the transparent flexible substrate 110 is formed with M rows of first flexible wires 120A, M rows of first flexible wires 120B, and M rows of first flexible wires 120C, and Parallelly interspersed in sequence, and N rows of second flexible wires 130, wherein the first flexible wires 120A, 120B, 120C and the second flexible wires 130 are staggered with each other and define M×N The pixel is 150, and M and N are natural numbers.

In addition, the first flexible wires 120A, 120B, and 120C are connected to the flexible printed circuit board (FPC) 180 through the first circuit 140A including the plurality of third flexible wires 140A'. The IC unit and the control circuit unit module 190 are connected by a driving circuit (not shown); the second flexible wire 130 is connected to the flexible printed circuit through the second circuit 140B including the plurality of fourth flexible wires 140B'. The flexible printed circuit board (FPC) 180 is connected to a driving circuit (not shown) located on the driving IC unit and the control circuit unit module 190, and details are not described herein.

The first flexible wires 120A, 120B, and 120C and the second flexible wire 130 may be selected from the group consisting of gold wire, silver wire, silver paste wire, copper wire, carbon nanotube, nano silver, and polydiox. One or a combination of ethyl thiophene polystyrene sulfonic acid (PEDOT). In addition, in order to reduce the resistance value of the wire, the first flexible wire 120A, 120B, 120C, and/or the second wire 130 described above, and/or the third flexible wire 140A' in the first circuit 140A described above And/or the fourth flexible wire 140B' of the second circuit 140B may be a single layer or a multi-layer structure, and may be by inkjet printing, roll printing, sputtering, electroplating, electroless plating, deposition, and subsequent It is prepared by etching and other techniques and will not be described here.

Next, please refer to FIG. 1B and FIG. 1C, which show an enlarged view of one of the pixels 150. As shown in FIG. 1B, the pixel 150 is the first flexible wire 120A, 120B, 120C and the (j)th column from the (i)th row, the (i+1)th row, and the (i+2)th row. The second flexible wire 130A is addressed, and the pixel 150 is provided with a light emitting diode package 160 that can respectively emit red light, blue light, green light or a mixed light thereof. In addition, each of the first flexible wires 120A, 120B, and 120C and each of the second flexible wires 130 further include a first insulating layer 125 sandwiched therebetween, and i and j are natural numbers. 1 i 3M-2,1 j N. In order to prevent the first flexible wires 120A, 120B, and 120C from being broken due to the difference in height of the insulating layer 125 when crossing the wires, the first insulating layer 125 may be a single layer structure or multiple layers of insulation as shown in FIG. 1D. Layer composition, which will not be described here. In addition, the first insulating layer 125 is completely covered on the second flexible conductive line 130 in this embodiment, and in other embodiments according to the present invention, the first insulating layer 125 may also cover only the first flexible The guide glands 120A, 120B, 120C meet the second flexible wire 130 (not shown). In addition, as shown in FIGS. 1B to 1C, the extension portion 120B1 of the first flexible conductive line 120B and the first flexible conductive line 120C further include a second insulating layer 126 sandwiched therebetween, which may also be a single layer. The structure or the multilayer structure as shown in FIG. 1D will not be described again here.

Each of the LED packages 160 includes a light emitting diode unit (not shown) that emits red light, green light, and blue light respectively. The light emitting diode units of the present embodiment are Light-emitting diode chips emitting red, green, and blue light, respectively. In addition, the back surface of each of the LED packages 160 having a non-light-emitting surface further includes a first conductive terminal 160A, a second conductive terminal 160B, a third conductive terminal 160C, and a fourth conductive terminal 160D. In addition, the selected light-emitting diode unit in the LED package 160 is familiar to those skilled in the art except for the red, green, and blue light-emitting diode units. Other visible light emitting diode units need to be selected, and the arrangement order and arrangement manner can be arbitrarily adjusted as needed.

As shown in FIGS. 1B-1C, the first conductive terminal 160A of the LED package 160 can be cured by a conductive paste 155 having a curing temperature lower than 250 degrees Celsius and a second flexible conductive line 130 from the (j)th column. The first conductive pad 145A extending from the first extending portion 131 is electrically connected to be electrically connected to the second flexible conductive line 130 of the (j) column; the second conductive terminal 160B of the LED package 160 is used by The conductive paste 155 having a curing temperature lower than 250 degrees Celsius is electrically contacted with the second conductive pad 145B extending from the second extending portion 120A1 of the first flexible conductive line 120A of the (i) row and the (i)th row The first flexible conductive line 120A is electrically connected; the third conductive terminal 160C of the light emitting diode package 160 is cured by a conductive adhesive 155 having a curing temperature lower than 250 degrees Celsius and a first flexible from the (i+1)th row The third conductive pad 145C extending from the third extending portion 120B1 of the wire 120B is electrically connected to be electrically connected to the first flexible wire 120B of the (i+1)th row; the fourth conductive of the LED package 160 The terminal 160D is extended by the conductive paste 155 having a curing temperature lower than 250 degrees Celsius and the fourth extending portion 120C1 of the first flexible wire 120C from the (i+2)th row. Out of the fourth conductive contact pad 145D electrically with the first (i + 2) of a first flexible electrical conductors 120C connecting line. In other embodiments according to the present invention, the conductive paste 155 may be used in combination with an anisotropic conductive paste (ACF) or an isotropic conductive paste (ACF), which will not be described herein.

In addition, in order to improve the transmittance of the display and reduce the resistance value of the wire, the first flexible wires 120A, 120B, and 120C may be parallel to each other (as shown in FIG. 1E) and mesh (eg, 1F). Figure 1) or interlaced (as shown in Figure 1G) The flexible conductor wire 120' is formed, and/or the second wire 130 described above may also be parallel to each other (as shown in FIG. 1H), mesh (as shown in FIG. 1I) or interlaced (eg, 1J). The second flexible sub-conductor 130' is shown in the figure. The third flexible wire 140A' in the first circuit 140A and/or the fourth flexible wire 140B' in the second circuit 140B may also be parallel to each other by a plurality of bars (as shown in FIG. 1K), mesh. (as shown in FIG. 1L) or a third flexible sub-wire 140A" and a fourth flexible sub-conductor 140B" which are staggered (as shown in FIG. 1M).

Accordingly, according to the first embodiment of the present invention, the design of the flexible circuit can be used on the flexible transparent substrate to fix the full-color LED package in each pixel of the flexible transparent substrate, thereby conveniently providing a high density. Rewardable light-emitting diode display.

Embodiment 2:

First, please refer to FIG. 2A, which shows a top view of a flexible light emitting diode display 300 in accordance with a second embodiment of the present invention. As shown in FIG. 2A, the LED display 300 includes a transparent flexible substrate 310, which may be selected from the group consisting of polyethylene terephthalate (PET), polymethyl acrylate (PMMA), and polyphthalate. The first transparent flexible substrate 310 of the present embodiment is composed of flexible polyethylene terephthalate (PET), one or a combination of amine (PI), polycarbonate (PC), and glass.

The upper surface 310A of the transparent flexible substrate 310 is formed with A rows of first flexible wires 320A and A rows of first flexible wires 320B, which are sequentially arranged in parallel with each other, and columns B of second flexible wires 330A and B. The second flexible wires 330B are respectively arranged in parallel in parallel. In addition, the first flexible wires 320A, 320B and the second flexible wires 330A, 330B are staggered with each other, and define A × B pixels 350, and A and B are Natural number.

In addition, the first flexible wires 320A, 320B are connected to the flexible printed circuit board (FPC) 380 through the first circuit 340A including the plurality of third flexible wires 340A', thereby being in position with the driving IC unit. And a driving circuit (not shown) connected to the control circuit unit module 390; the second flexible wires 330A, 330B are connected to the flexible printed circuit through the second circuit 340B including the plurality of fourth flexible wires 340B' The flexible printed circuit board (FPC) 380 is connected to a driving circuit (not shown) located on the driving IC unit and the control circuit unit module 390, and details are not described herein.

The first flexible wires 320A, 320B and the second flexible wires 330A, 330B may be selected from the group consisting of gold wire, silver wire, silver paste wire, copper wire, carbon nanotube, nano silver, polydiox. One or a combination of ethyl thiophene polystyrene sulfonic acid (PEDOT). In addition, in order to reduce the resistance value of the wire, the first flexible wire 320A, 320B, 320C, and/or the second wire 330 described above, and/or the third flexible wire 340A' in the first circuit 340A described above. And/or the fourth flexible wire 340B' in the second circuit 340B may be a single layer or a multilayer structure and may be by inkjet printing, roll printing, sputtering, electroplating, electroless plating, deposition, and subsequent The etching is prepared by techniques such as etching, and will not be described herein.

Next, please refer to FIG. 2B and FIG. 2C, which show an enlarged view of one of the pixels 350. As shown in FIG. 2B, each pixel 350 includes: a first sub-pixel 350A, addressed by the first flexible conductor 320A of the (d)th row and the second flexible conductor 330A of the (e)th column. Formed; a second sub-pixel 350B, the first flexible by the (d+1)th line The wire 320B is positioned to be positioned with the second flexible wire 330A of the (e)th column; a third sub-pixel 350C, the first flexible wire 320A of the (d)th row and the second (e+1)th column of the second The flexible wire 330B is addressed; and a fourth sub-pixel 350D is formed by the first flexible wire 320B of the (d+1)th row and the second flexible wire 330B of the (e+1)th column.

Each of the second flexible wires 330A, 330B is covered by a first insulating layer 325 such that the first flexible wires 320A, 320B can be bridged over each of the second flexible wires 330A, 330B, wherein d, e are natural numbers, and 1 d 2A-1,1 e 2A-1. Each of the first insulable layers 325 is a single layer structure or a multilayer structure as shown in FIG. 2D. In addition, in other embodiments according to the present invention, the first insulating layer 325 may also be formed only at the intersection of the first flexible wires 320A, 320B and the second flexible wires 330A, 330B (not shown), not here. Let me repeat.

In addition, a plurality of first light-emitting diodes 360A are respectively fixed in each of the first sub-pixels 350A, and each of the first light-emitting diodes 360A has a non-light-emitting surface on the back surface thereof, and includes a fifth conductive terminal. 360A1 and a sixth conductive terminal 360A2; a plurality of second light-emitting diodes 360B are respectively fixed in each of the second sub-pixels 350B, and each of the second light-emitting diodes 360B is not on the back side of the light-emitting surface. Each includes a seventh conductive terminal 360B1 and an eighth conductive terminal 360B2; a plurality of third light emitting diodes 360C are respectively fixed in each of the third sub-pixels 350C, and each of the third light emitting diodes The back surface of the 360C non-light-emitting surface includes a ninth conductive terminal 360C1 and a tenth conductive terminal 360C2; a plurality of fourth light-emitting diodes 360D are respectively fixed in each of the fourth sub-pixels 350D, and each The back surface of a fourth light-emitting diode 360D non-light-emitting surface includes An eleventh conductive terminal 360D1 and a twelfth conductive terminal 360D2.

In the embodiment, the first light-emitting diode 360A is a red light-emitting diode package, the second light-emitting diode 360B is a green light-emitting diode package, and the third light-emitting diode is The polar body 360C is a blue light emitting diode package, and the fourth light emitting diode 360D is a yellow or white light emitting diode package. However, in other embodiments according to the present invention, the first light-emitting diode 360A, the second light-emitting diode 360B, the third light-emitting diode 360C, and the fourth light-emitting diode 360D may select other visible light-emitting lights as needed. The polar body package, and the order of its arrangement can be adjusted as needed. In addition, in other embodiments according to the present invention, the first light emitting diode 360A, the second light emitting diode 360B, the third light emitting diode 360C, and the third light emitting diode 360D may also use a flip chip light emitting diode. The polar body wafers, such as a flip-chip red light wafer, a flip-chip green light wafer, a flip-chip blue light wafer, and a flip-chip yellow light wafer, are replaced, and the arrangement order thereof may be adjusted as needed, and details are not described herein again.

In addition, as shown in FIG. 2C, the fifth conductive terminal 360A1 of the first light emitting diode 360A can be cured by a conductive paste 355 having a curing temperature lower than 250 degrees Celsius and a second flexible conductive line 330A from the (e)th column. The fifth conductive pad 345R1 extending from the fifth extension portion 330A1 is electrically connected to the second flexible conductive line 330A of the (e)th column, and the sixth conductive terminal 360A2 is also capable of curing temperature lower than Celsius. The 250 degree conductive paste 355 is in electrical contact with the sixth conductive pad 345R2 extending from the sixth extension 320A1 of the first flexible wire 320A of the (d) row and the first flexible wire of the (d)th row 320A is electrically connected; the seventh conductive terminal 360B1 of the second light emitting diode 360B can be cured by a lower temperature than The conductive paste 355 of 250 degrees is electrically contacted with the seventh conductive pad 345G1 extending from the seventh extension 330A2 of the second flexible wire 330A of the (e) column and the second flexible of the column (e) The wire 330A is electrically connected, and the eighth conductive terminal 360B2 can also be extended by the conductive paste 355 having a curing temperature lower than 250 degrees Celsius and the eighth extending portion 320B1 of the first flexible wire 320B from the (d+1)th row. The eighth conductive pad 345G2 is electrically connected to the first flexible wire 320B of the (d+1)th row; the ninth conductive terminal 360C1 of the third LED 360C can be cooled by the curing temperature. The conductive paste 355 of 350 degrees Celsius is electrically contacted with the ninth conductive pad 345B1 extending from the ninth extension 330B1 of the second flexible wire 330B of the (e+1)th column and the (e+1)th column The second flexible conductive line 330B is electrically connected, and the tenth conductive terminal 360C2 thereof can also pass through the tenth extension of the conductive adhesive 355 having a curing temperature lower than 250 degrees Celsius and the first flexible conductive line 320A from the (d)th row. The tenth conductive pad 345B2 extended by the 320A2 is electrically connected to the first flexible wire 320A of the (d) row; the fourth light emitting diode 360D is electrically connected The eleventh conductive terminal 360D1 can be extended by the conductive paste 355 having a curing temperature lower than 350 degrees Celsius and the eleventh conductive pad extending from the eleventh extending portion 330B2 of the second flexible wire 330B of the (e+1)th column 345Y1 is electrically connected to the second flexible wire 330B of the (e+1)th column, and the twelfth conductive terminal 360D2 of the second conductive terminal 360D2 can also be cured by a conductive adhesive 355 and a self-curing temperature of less than 250 degrees Celsius ( The twelfth conductive pad 345Y2 extending from the twelfth extending portion 320B2 of the first flexible conductive line 320B of the d+1) row is electrically connected to be electrically connected to the first flexible conductive line 320B of the (d+1)th row. . In other embodiments in accordance with the present invention, the conductive paste 355 can be used in combination with an anisotropic conductive paste (ACF) or an anisotropic conductive paste (ACF).

In addition, in order to improve the transmittance of the display and reduce the resistance value of the wire, the first flexible wires 320A, 320B are parallel to each other (as shown in FIG. 2E) and mesh (as shown in FIG. 2F). The first flexible conductor wire 320' is formed or staggered (as shown in FIG. 2G), and/or the second wire 330A, 330B is parallel to each other (as shown in FIG. 2H). , a mesh (as shown in FIG. 2I ) or a second flexible conductor 330 ′ that is staggered (as shown in FIG. 2J ), and the third flexible conductor 340A ′ in the first circuit 340A described above And/or the fourth flexible conductor 340B' in the second circuit 340B is respectively parallel to the plurality of strips (as shown in FIG. 2K), mesh (as shown in FIG. 2L) or interlaced (eg, 2M map) The third flexible sub-wire 340A" and the fourth flexible sub-wire 340B" are shown.

Accordingly, according to the second embodiment of the present invention, the design of the flexible circuit can be utilized on the flexible transparent substrate to respectively represent the four primary colors (R, G, B, Y or R, G, B, W). The polar package or the light emitting diode chip is fixed in each sub-pixel of the flexible transparent substrate to conveniently provide a high-density flexible light-emitting diode display.

In summary, the various flexible LED displays proposed by the present invention are designed to be electrically conductive on a transparent flexible substrate by using a flexible circuit design with a full-color LED or a monochromatic LED. The change of the position of the terminal enables the full-color LED or the monochromatic LED to be applied to the transparent flexible substrate, which not only solves the complicated wiring problem of the full-color LED display, but also is transparent by a single layer. The substrate provides a full-color LED display with a simple process and high density arrangement.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art without departing from the invention Within the spirit and scope, the various embodiments described above can be modified and combined.

Claims (30)

A flexible light emitting diode display comprising: a transparent flexible substrate having an opposite upper and lower surface; 3M rows of first flexible wires and N columns of second flexible wires formed on the flexible substrate The upper flexible surface and the second flexible wires are staggered with each other and define M×N pixels, each of the pixels being the (i)th, (i) +1) rows, (i+2) rows of the first flexible wires and (j) columns of the second flexible wires are addressed, and M, N, i, j are natural numbers, 1 i 3M-2,1 j N, a first insulating layer is formed at each of the first flexible wires and each of the second flexible wires and is sandwiched between each of the first flexible wires and each of the second wires Between the flexible wires, or covering each of the second flexible wires; a plurality of LED packages are respectively fixed in each of the pixels; and a first circuit includes a plurality of third a flexible wire, each of the third flexible wires being respectively connected to one of the first flexible wires; a second circuit comprising a plurality of fourth flexible wires, each of the fourth flexible wires being respectively connected One of the second flexible wires; wherein each of the first flexible wires comprises a plurality of first flexible sub-wires that are parallel, meshed or staggered with each other, and/or each of the second flexible wires The flexible wire includes a plurality of second flexible sub-wires that are parallel to each other, meshed or staggered, and a driving circuit electrically connected to the first circuit and the second circuit, respectively. The flexible light-emitting diode display of claim 1, wherein the material of the transparent flexible substrate comprises polyethylene terephthalate (PET), polymethyl acrylate (PMMA), polyfluorene. One or a combination of imine (PI), polycarbonate (PC), glass. The flexible light-emitting diode display of claim 1, wherein the materials of the first and second flexible wires comprise gold wire, silver wire, silver paste, copper wire, carbon nanotube, One of polydioxyethyl thiophene polystyrene sulfonic acid (PEDOT), nano silver or a combination thereof. The flexible light-emitting diode display of claim 1, wherein each of the first flexible wires, each of the second flexible wires, and each of the third flexible wires And each of the fourth flexible wires is a single layer or a multilayer structure. The flexible light-emitting diode display of claim 4, wherein each of the third flexible wires comprises a plurality of third flexible sub-wires that are parallel, meshed or staggered with each other, and And each of the fourth flexible wires includes a plurality of fourth flexible sub-wires that are parallel, meshed, or staggered with each other. The flexible light-emitting diode display of claim 1, wherein each of the light-emitting diode packages emits red light, green light, blue light, and a mixture thereof. The flexible light-emitting diode display of claim 1, wherein each of the light-emitting diode packages comprises a plurality of light-emitting diode units each capable of emitting red, green or blue light. The flexible light-emitting diode display of claim 5, wherein each of the light-emitting diode packages comprises three light-emitting diode units, and each of them can emit red light, green light or A blue light emitting diode unit. The flexible light-emitting diode display of claim 1, wherein each of the light-emitting diode packages is made of a conductive paste that can be cured at a temperature lower than 250 degrees Celsius and/or An anisotropic glue (ACF) is immobilized within each of the pixels. The flexible light-emitting diode display of claim 1, wherein the first insulating layer is composed of a single-layer insulating material or a plurality of layers of insulating material. The flexible light-emitting diode display of any one of claims 1 to 10, each of the light-emitting diode packages includes four independent first, second, and third a fourth conductive terminal, and the second flexible wire of the (j)th column has a first extension connected to the first conductive pad, and the first flexible wire of the (i)th row has a connection a second extension portion of the second conductive pad, the first flexible wire of the (i+1)th row has a fourth extension portion connected to a fourth conductive pad, and the first flexible portion of the (i+2)th row The wire has a third extension connected to the third conductive pad, wherein the first conductive terminal is electrically connected to the second flexible wire of the (j) column by being connected to the first conductive pad, the second The conductive terminal is electrically connected to the first flexible wire of the (i)th row by being connected to the second conductive pad, the fourth conductive terminal is connected to the fourth conductive pad and the first (i+1) The first flexible wire of the row is electrically connected, and the third conductive terminal is electrically connected to the first flexible wire of the (i+2)th row by being connected to the third conductive pad Pick up. The flexible light emitting diode display of claim 9, wherein the driving circuit comprises at least one driving IC. The flexible light-emitting diode display of claim 10, wherein the first flexible wire of the (i)th row is located on the left side of the light-emitting diode package, and the first The first flexible wire of the +1) row and the first flexible wire of the (i+2)th row are located on the right side of the LED package. The flexible light-emitting diode display of claim 11, further comprising a third insulating layer sandwiching the third flexible portion of the first flexible wire of the (i+2)th row and the The first flexible wire intersection of the (i+1)th row. The flexible light-emitting diode display of claim 14, wherein the second insulating layer is composed of a single-layer insulating material or a plurality of layers of insulating material. A flexible light-emitting diode display comprising: a transparent flexible substrate having an opposite upper and lower surface; 2A rows of first flexible wires; and 2B rows of second flexible wires formed on the flexible substrate On the upper surface, the first flexible wires and the second flexible wires are staggered with each other and define A×B pixels, and each of the pixels includes: a first sub-pixel, The first flexible wire of the (d) row and the second flexible wire of the (e)th column are addressed; a second sub-pixel, the first flexible by the (d+1)th row a wire and the second flexible wire of the (e) column are addressed; a third sub-pixel, the first flexible wire of the (d)th row and the second (e+1)th column The flexible wire is addressed; a fourth sub-pixel is formed by the first flexible wire of the (d+1)th row and the second flexible wire of the (e+1)th column; wherein A, B, d, and e are all natural numbers, 1 d 2A-1,1 e 2B-1; a first insulating layer formed at each of the first flexible wires and each of the second flexible wires and sandwiched between each of the first flexible wires and each of the first flexible wires Between the second flexible wires or covering each of the second flexible wires; a plurality of first light-emitting diodes respectively fixed in each of the first sub-pixels; and a plurality of second light-emitting elements a diode is respectively fixed in each of the second sub-pixels; a plurality of third light-emitting diodes are respectively fixed in each of the third sub-pixels; and a plurality of fourth light-emitting diodes, Each of the first sub-pixels is respectively fixed in the fourth sub-pixel; a first circuit includes a plurality of third flexible wires, and each of the third flexible wires is respectively connected to one of the first flexible wires; a second circuit comprising a plurality of fourth flexible wires, and each of the fourth flexible wires is respectively connected to one of the second flexible wires; wherein each of the first flexible wires comprises a plurality of wires First flexible sub-wires that are parallel, meshed, or staggered with each other, and/or each of the second flexible wires includes Parallel to each other, a mesh or the second interleaved sub flexible wire; and a driving circuit electrically connected to the first circuit and the second circuit. The flexible light-emitting diode display of claim 16, wherein the material of the transparent flexible substrate comprises polyethylene terephthalate (PET), polymethyl acrylate (PMMA), polyfluorene. One or a combination of imine (PI), polycarbonate (PC), glass. The flexible light-emitting diode display of claim 16, wherein the materials of the first and second flexible wires comprise gold wire, silver wire, silver paste, copper wire, carbon nanotube, One of polydioxyethyl thiophene polystyrene sulfonic acid (PEDOT), nano silver or a combination thereof. The flexible light-emitting diode display of claim 16, wherein each of the first flexible wires, each of the second flexible wires, and each of the third flexible wires And each of the fourth flexible wires is a single layer or a multilayer structure. The flexible light-emitting diode display of claim 19, wherein each of the third flexible wires comprises a plurality of third flexible sub-wires that are parallel, meshed or staggered with each other, and And each of the fourth flexible wires includes a plurality of fourth flexible sub-wires that are parallel, meshed, or staggered with each other. The flexible light emitting diode display of claim 16, wherein the first light emitting diodes are red light emitting diode packages or flip chip Red light emitting diode chip. The flexible light-emitting diode display of claim 16, wherein the second light-emitting diodes are green light-emitting diode packages or flip-chip green light-emitting diode chips. The flexible light-emitting diode display of claim 16, wherein the third light-emitting diode is a blue light-emitting diode package or a flip-chip blue light-emitting diode chip. The flexible light-emitting diode display of claim 16, wherein the fourth light-emitting diode is a yellow light-emitting diode package or a flip-chip yellow light-emitting diode chip. The flexible light-emitting diode display of claim 16, wherein the fourth light-emitting diode is a white light-emitting diode package or a flip-chip white light-emitting diode chip. The flexible light-emitting diode display of claim 16, wherein each of the first, second, third or fourth light-emitting diodes is at a temperature lower than 250 degrees Celsius A cured conductive paste and/or an anisotropic adhesive (ACF) are respectively fixed in each of the first, second, third, and fourth sub-pixels. The flexible light-emitting diode display of claim 16, wherein the first insulating layer is composed of a single-layer insulating material or a plurality of layers of insulating material. A flexible light emitting diode display according to any one of claims 16 to 27, wherein: Each of the first light emitting diodes includes two independent fifth and sixth conductive terminals, and the second flexible wire of the (e)th column has a fifth extension connected to a fifth conductive pad. The first flexible wire of the (d) row has a sixth extension connected to a sixth conductive pad, and the fifth conductive terminal of each of the first light-emitting diodes is The fifth conductive pad is electrically connected to the second flexible wire of the (e) column, and the sixth conductive terminal of each of the first light-emitting diodes is contacted with the sixth conductive pad. The first flexible wires of the (d) row are electrically connected; each of the second light emitting diodes comprises two independent seventh and eighth conductive terminals, and the first (e)th column The second flexible wire has a seventh extension connected to a seventh conductive pad, and the first flexible wire of the (d+1)th row has an eighth extension connected to an eighth conductive pad, and each of the The seventh conductive terminal of the second light emitting diode is electrically connected to the second flexible wire of the (e)th column by contacting the seventh conductive pad, each of the first The eighth conductive terminal of the light emitting diode is electrically connected to the first flexible wire of the (d+1)th row by contacting the eighth conductive pad; each of the third light emitting diodes Each includes two independent ninth and tenth conductive terminals, and the second flexible wire of the (e+1)th column has a ninth extension connecting a ninth conductive pad, the (d)th row The first flexible wire has a tenth extension connected to a tenth conductive pad, and the ninth conductive terminal of each of the third light emitting diodes is in contact with the ninth conductive pad The second flexible wires of the (e+1)th column are electrically connected, and the tenth conductive terminal of each of the third light emitting diodes is in contact with the tenth conductive pad and the (d)th row Electrically connecting the first flexible wire; Each of the fourth light emitting diodes includes two independent eleventh and twelfth conductive terminals, and the second flexible wire of the (e+1)th column has a connection and an eleventh conductive An eleventh extension of the pad, the first flexible wire of the (d+1)th row has a twelfth extension connecting a twelfth conductive pad, and each of the fourth light emitting diodes The eleventh conductive terminal is electrically connected to the second flexible wire of the (e+1)th column by contacting the eleventh conductive pad, and the tenth of each of the fourth light emitting diodes The two conductive terminals are electrically connected to the first flexible wire of the (d+1)th row by contacting the twelfth conductive pad. The flexible light emitting diode display of claim 28, wherein the driving circuit comprises at least one driving IC. A flexible LED display includes: a transparent flexible substrate; a plurality of rows of first flexible wires; and a plurality of rows of second flexible wires formed on a surface of the transparent flexible substrate, the first The flexible wires and the second flexible wires are staggered with each other and define a plurality of pixels, and the intersection of the first flexible wires and the second flexible wires is insulated and insulated; a diode package respectively fixed in each of the pixels; a first circuit comprising a plurality of third flexible wires, each of the third flexible wires being respectively connected to one of the first flexible wires a second circuit comprising a plurality of fourth flexible wires, each of the fourth flexible wires being respectively connected to one of the second wires; Wherein each of the first flexible wires comprises a plurality of first flexible sub-wires that are parallel, meshed or staggered with each other, and/or each of the second flexible wires comprises a plurality of parallel, mesh-like Or a second flexible sub-wire that is staggered; and a driving circuit electrically connected to the first circuit and the second circuit, respectively.