CN115713899A - Naked lamp pearl and LED display screen - Google Patents
Naked lamp pearl and LED display screen Download PDFInfo
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- CN115713899A CN115713899A CN202110955671.3A CN202110955671A CN115713899A CN 115713899 A CN115713899 A CN 115713899A CN 202110955671 A CN202110955671 A CN 202110955671A CN 115713899 A CN115713899 A CN 115713899A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
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Abstract
The invention provides a bare lamp bead and an LED display screen, aiming at solving the problem that the size of the LED display screen cannot be enlarged due to the limited serial connection of a lamp bead string formed by serially connecting LED lamp beads in the prior art. The naked lamp bead comprises a driving chip and a light-emitting wafer; the light emitting chip is mounted on the driving chip; the driving chip is provided with a pair of power supply pins, a pair of signal pins and a pair of short-circuit pins; the short circuit pins comprise a first short circuit pin and a second short circuit pin; the first short-circuit pin and the second short-circuit pin are in short circuit; and the control signal for controlling the on and off of the light-emitting wafer does not pass through the internal circuit of the driving chip and is transmitted to the next bare lamp bead. The application provides a bare lamp pearl, it adopts no shell structure, can reduce bare lamp pearl's size. The length of lamp pearl cluster can effectively be lengthened to this kind of mode for when it uses LED display screen, can increase the size of LED display screen.
Description
Technical Field
The invention relates to the field of LED displays, in particular to the field of transparent LED display screens.
Background
LED display screens are gradually used in the market and various product forms are developed. As shown in fig. 1, an existing LED lamp bead 2' generally includes a housing 22', and a driving chip 21' and a light emitting chip 20' formed in the housing 22 '; pins 23' are typically provided on the housing 22' and the pins 23' are intended to be mounted on a substrate.
As shown in fig. 2, the conventional LED display screen generally includes a plurality of LED beads 2' (e.g., one row or one column, or a plurality of rows or a plurality of columns) connected in series end to form a bead string, and the LED display screen includes a plurality of bead strings. The applicant finds that, in the research and development process, the display effect of the traditional LED lamp beads 2' is reduced due to the fact that the traditional LED lamp beads are limited by the objective fact of signal attenuation in the signal transmission process and are connected in series in too many ways. In an ideal state, the number of LED bulbs 2' connected in series in one bulb string is generally controlled within a specific range. The size of the LED display screen is limited by the control in the mode, and the size of the LED display screen cannot be enlarged.
Disclosure of Invention
The invention provides a bare lamp bead and an LED display screen, aiming at solving the problem that the size of the LED display screen cannot be enlarged due to the limited serial connection of a lamp bead string formed by serially connecting LED lamp beads in the prior art.
The application provides a bare lamp bead on one hand, and the bare lamp bead comprises a driving chip and a light-emitting wafer; the light emitting chip is mounted on the driving chip;
the driving chip is provided with a pair of power supply pins, a pair of signal pins and a pair of short-circuit pins;
the signal pins comprise a first signal pin and a second signal pin, the first signal pin and the second signal pin pass through the internal circuit of the driving chip, and a control signal for controlling the on and off of the light-emitting wafer passes through the internal circuit of the driving chip and is transmitted to a next bare lamp bead;
the short-circuit pins comprise a first short-circuit pin and a second short-circuit pin; first short circuit pin with short circuit between the second short circuit pin controls the control signal that the bright control of emitting wafer goes out does not pass through driver chip's internal circuit to next naked lamp pearl transmission.
The application provides a bare lamp pearl, it adopts no shell structure, consequently can reduce bare lamp pearl's size. A pair of signal pins and a pair of short-circuit pins are directly arranged on a driving chip, so that the bare lamp bead can receive two groups of control signals, when one group of control signals are input and output from the signal pins, the control signals pass through an internal circuit of the driving chip to control the on and off of the light-emitting wafer and are transmitted to the next bare lamp bead; when the other set of control signals are input and output through the short-circuit pins, the control signals are not transmitted to the next bare lamp bead directly without passing through the internal circuit of the driving chip. So, when concatenating this kind of bare lamp pearl and forming the lamp pearl cluster for two sets of control signal intervals are in the effect in the lamp pearl cluster, and interval transmission in the bare lamp pearl cluster. The length of the lamp bead string can be effectively increased by the mode, so that the size of the LED display screen can be increased when the LED display screen is applied to the LED display screen.
Further, the naked lamp bead is provided with a color pin, and the color pin is respectively electrically connected with the light-emitting wafer.
Further, the light emitting chip is mounted on the driving chip by a CSP or COC method.
The application provides an LED display screen on the other hand, which comprises a substrate and bare lamp beads; the substrate is provided with a circuit pattern; the naked lamp bead array is arranged on the substrate;
the circuit pattern comprises a power supply pad, a signal pad and a power supply circuit; the power supply lines comprise a plurality of first power supply lines and second power supply lines with opposite polarities; the power supply pad is connected with the first power supply line and the second power supply line;
the naked lamp bead comprises a driving chip and a light-emitting wafer; the light emitting chip is mounted on the driving chip;
more than one pair of power supply pins, a pair of signal pins and a pair of short-circuit pins are arranged on the driving chip;
the power supply pins comprise a first power supply pin and a second power supply pin; the first power supply pin is directly or indirectly connected to the first power supply circuit, and the second power supply pin is directly or indirectly connected to the second power supply circuit;
the signal pins comprise a first signal pin and a second signal pin, and an internal circuit of the driving chip passes between the first signal pin and the second signal pin; a control signal for controlling the on-off of the light-emitting wafer passes through an internal circuit of the driving chip and is transmitted to a next bare lamp bead;
the short-circuit pins comprise a first short-circuit pin and a second short-circuit pin; the first short-circuit pin and the second short-circuit pin are in short circuit; the control signal for controlling the on and off of the light-emitting wafer does not pass through an internal circuit of the driving chip and is transmitted to a next bare lamp bead;
the bare lamp beads are connected in series to form a lamp bead string, and each lamp bead string is correspondingly provided with two signal bonding pads which are respectively called a first signal bonding pad and a second signal bonding pad;
in the lamp bead string, a signal pin of an input signal of a first bare lamp bead is connected to a first signal bonding pad, and a short-circuit pin of the input signal of the first bare lamp bead is connected to a second signal bonding pad; or a signal pin of an input signal of the first bare lamp bead is connected to the second signal pad, and a short-circuit pin of the input signal of the first bare lamp bead is connected to the first signal pad;
the signal pins of the input signals of the other bare lamp beads are connected to the short-circuit pin of the output signal of the previous bare lamp bead, and the short-circuit pin of the input signal of each bare lamp bead is connected to the signal pin of the output signal of the previous bare lamp bead; the signal pin of the output signal of each bare lamp bead is connected to the short circuit pin of the input signal of the next bare lamp bead, and the short circuit pin of the output signal of each bare lamp bead is connected to the signal pin of the input signal of the next bare lamp bead.
The application discloses LED display screen, because the bare lamp pearl that its array was arranged adopts no shell structure, consequently can reduce the size of bare lamp pearl. A pair of signal pins and a pair of short-circuit pins are directly arranged on the driving chip, so that the bare lamp bead can receive two groups of control signals, when one group of control signals are input and output from the signal pins, the control signals pass through an internal circuit of the driving chip to control the on and off of the light-emitting wafer and are transmitted to the next bare lamp bead; when the other set of control signals are input and output through the short-circuit pins, the control signals are not transmitted to the next bare lamp bead directly without passing through the internal circuit of the driving chip. Each naked lamp pearl had both accessed into the control signal of 2 nd naked lamp pearls output in the upper reaches and carried out work, was the signal transmission medium of last 1 naked lamp pearl simultaneously again, and the control signal of the naked lamp pearl of last one does not pass through this naked lamp pearl and directly transmits for next naked lamp pearl. So, when concatenating this kind of naked lamp pearl and forming the lamp pearl cluster for two sets of control signal intervals are acted on in the lamp pearl cluster, and the interval transmission in the naked lamp pearl cluster. The length of lamp pearl cluster can effectively be lengthened to this kind of mode for when it uses LED display screen, can increase the size of LED display screen.
Further, the substrate is a transparent substrate. At this time, the LED display screen is a transparent LED display screen.
Furthermore, the bare lamp beads are bound and connected to the transparent substrate in a COG mode.
Furthermore, a glue filling layer is arranged on the transparent substrate on which the bare lamp beads are arranged, and each bare lamp bead is packaged in the glue filling layer; and a protective cover plate is arranged on the upper surface of the glue filling layer.
Further, bare lamp pearl passes through the signal jumper wire and binds with signal pad, perhaps short circuit pad or its front and back bare lamp pearl and is connected.
Furthermore, the first power supply pin on each bare lamp bead is bound and connected to a first power supply circuit or a first power supply pin on a neighboring bare lamp bead through a power supply jumper; the second power supply pin on each bare lamp bead is bound and connected to a second power supply circuit or a second power supply pin on an adjacent bare lamp bead through a power supply jumper; each naked lamp bead can be directly taken from the power supply circuit or taken from the adjacent naked lamp beads.
Further, the diameters of the power supply jumper and the signal jumper are 15-70 μm.
Drawings
Fig. 1 is a schematic perspective partial cross-sectional view of an LED lamp bead disclosed in the prior art;
FIG. 2 is a schematic diagram of a string of LED bulbs as disclosed in the prior art;
fig. 3 is a schematic perspective view of a bare lamp bead provided in the embodiment of the present application;
fig. 4 is a schematic top view of a bare lamp bead provided in the present embodiment;
fig. 5 is a schematic cross-sectional view of a transparent LED display screen provided with the bare lamp beads in fig. 3 and fig. 4 according to an embodiment of the present application;
fig. 6 is a schematic cross-sectional view of a transparent LED display screen provided with the bare lamp beads in fig. 3 and 4 according to an embodiment of the present disclosure;
fig. 7 is a schematic top view of another transparent LED display screen provided in an embodiment of the present application.
The reference numbers in the background art are as follows: 2', LED lamp beads; 20', a light emitting wafer; 21', a driving chip; 22', a housing; 23', pins;
reference numerals in the detailed description: 1. a transparent substrate; 2. naked lamp beads; 3. a circuit pattern; 4. a protective cover plate; 5. filling a glue layer; 20. a light emitting chip; 21. a driving chip; 20r, red light emitting chip; 20g, green light emitting chip; 20b, a blue light emitting wafer; 211. a signal pin; 212. a first power supply pin; 213. a second power supply pin; 214. short-circuit pins; 31. a power supply line; 31a, a first power supply line; 31b, a second power supply line; 32. a signal line; 33. a signal pad; 311. a power supply jumper; 321. a signal jumper; 331. a first signal pad; 332. a second signal pad.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The embodiment will specifically explain the bare lamp bead 2 disclosed in the present application. As shown in fig. 3 and 4, the bare lamp bead 2 disclosed in this embodiment includes a driving chip 21 and a light emitting chip 20; the light emitting chip 20 is mounted on the driving chip 21;
the driving chip 21 is provided with a pair of power supply pins, a pair of signal pins 211 and a pair of short-circuit pins 214;
the signal pins 211 comprise a first signal pin and a second signal pin, and an internal circuit of the driving chip 21 passes between the first signal pin 211 and the second signal pin; a control signal for controlling the on/off of the light emitting wafer 20 passes through an internal circuit of the driving chip 21 and is transmitted to the next bare lamp bead 2;
the shorting pin 214 comprises a first shorting pin and a second shorting pin; the first short-circuit pin and the second short-circuit pin are in short circuit; the control signal for controlling the on/off of the light emitting wafer 20 does not pass through the internal circuit of the driving chip 21 and is transmitted to the next bare lamp bead 2.
The size range of the naked lamp bead 2 is 0.5mm x 0.5mm to 0.7mm x 0.7mm. Far smaller than the traditional LED lamp beads. Therefore, the resolution of the transparent LED display screen can be effectively improved.
Generally, a driving circuit is integrated in the driving chip 21, and a passivation layer is provided on the driving chip 21, and the passivation layer is a surface insulating layer formed when the driving chip 21 is manufactured. The driving chip 21 is provided with a plurality of pins, the technology for mounting the light emitting chip 20 on the driving chip 21 is well known, and the light emitting chip 20 is generally fixedly mounted on the driving chip 21 by the (CSP or COC) technology, and the pins on the driving chip 21 are electrically connected to the light emitting chip 20 by direct soldering or by bonding wires. Bonding wires or bonding wires generally include gold wires, copper wires, palladium-plated copper wires, alloy wires, and the like. And will not be described in detail. Pins (english name: PAD) are generally provided on the passivation layer, which are terminals inside the chip. The driving chip 21 comprises a pair of signal pins 211, a power supply pin and a pair of short-circuit pins 214; the signal pins 211 include a first signal pin and a second signal pin; the power pins include a first power pin 212 and a second power pin 213213; as shown in the figure, the driving chip 21 is divided into upper, lower, left and right directions; it can be seen that a pair of signal pins 211 are respectively disposed at the upper right corner and the lower left corner of the driving chip 21; wherein, a pair of power supply pins are arranged at the upper part of the left side; the other pair of power supply pins is arranged at the lower part of the right side edge. In this embodiment, the light emitting chips 20 preferably include three colors of red, green and blue light emitting chips 20, which are referred to as a first light emitting chip, a second light emitting chip and a third light emitting chip; the first light emitting chip is a red light emitting chip 20r, the second light emitting chip is a green light emitting chip 20g, and the third light emitting chip is a blue light emitting chip 20b. As shown in the drawing, a red light emitting wafer 20r, a green light emitting wafer 20g, and a blue light emitting wafer 20b are sequentially mounted on the driving chip 21.
The input and output of the signal pin 211 are opposite, for example, the first signal pin is a signal input pin, and the second signal pin is a signal output pin. Otherwise, the first signal pin is a signal output pin, and the second signal pin is a signal input pin. Preferably, the two signal pins 211 are switchable with each other. One of the two signal pins 211 serves as a signal input pin, and the other serves as a signal output pin. As preferred scheme, this naked lamp pearl 2 preferred is two-way transmission naked lamp pearl. A first signal pin of the bidirectional transmission bare lamp bead is an input signal pin, and a second signal pin is an output signal pin; otherwise, the second signal pin of the bidirectional transmission bare lamp bead 2 is an input signal pin, and the first signal pin is an output signal pin. Adopt this kind of two-way transmission naked lamp pearl, it is when carrying out concatenating of naked lamp pearl 2, can realize the two-way input signal of naked lamp pearl 2 and carry out the transmission. The bidirectional transmission scheme is an original technology of the applicant, and the applicant has already patented the driving chip 21 and the lamp bead for bidirectional transmission (for details, please refer to CN 111341247A). Reference may be made directly to its bi-directional transmission scheme in this example. No further description is given.
The pair of shorting pins 214 includes a shorting pin 214 for inputting a signal and a shorting pin 214 for outputting a signal; the pair of shorting pins 214 are shorted inside the driving chip 21, so that the control signal is directly transmitted between the shorting pins 214 without passing through the circuit inside the driving chip 21. For example, if the first short-circuited pin is the short-circuited pin 214 for the input signal, the second short-circuited pin is the short-circuited pin 214 for the output signal, and vice versa; the second shorted pin is the shorted pin 214 for the input signal, and the first shorted pin is the shorted pin 214 for the output signal.
In the mounting method of the light emitting Chip 20, it is preferable that the light emitting Chip 20 is mounted on the driver Chip 21 by a CSP (Chip Scale Package) method. And will not be described in detail. Or may be mounted On the driving Chip 21 by a COC (Chip On Chip, chinese) manner. All the above-mentioned methods are well known to those skilled in the art and will not be described in detail.
Preferably, the light emitting chip 20 is installed on the driving chip 21 and then installed on the transparent substrate 1 as an integral bare lamp bead 2, which is beneficial to improving the process efficiency and the yield.
Wherein, be equipped with the colour pin on naked lamp pearl 2, the colour pin respectively with emitting light wafer 20 electricity is connected. For example, the color pins include a red pin, a green pin and a blue pin, the red pin is electrically connected to the red light emitting chip 20r, the green pin is electrically connected to the green light emitting chip 20g, and the blue pin is electrically connected to the blue light emitting chip 20b; and controlling the on and off of each light-emitting wafer through the color pins.
The application provides a bare lamp pearl 2, it adopts no shell structure, consequently can reduce bare lamp pearl 2's size. A pair of signal pins 211 and a pair of short-circuit pins 214 are directly arranged on the driving chip 21, so that the bare lamp bead 2 can receive two groups of control signals, wherein when one group of control signals are input and output from the signal pins 211, the control signals pass through an internal circuit of the driving chip 21, control the on and off of the light-emitting wafer 20, and are transmitted to the next bare lamp bead 2; when the other set of control signals is input and output through the short-circuit pin 214, the control signals are not passed through the internal circuit of the driving chip 21, but are directly transmitted to the next bare lamp bead 2. So, when concatenating this kind of naked lamp pearl 2 and forming the lamp pearl cluster for two sets of control signal intervals are in the effect of lamp pearl cluster, and the interval transmission in naked lamp pearl 2 clusters. The length of lamp pearl cluster can effectively be lengthened to this kind of mode for when it uses LED display screen, can increase the size of LED display screen.
Example 2
The LED display screen disclosed in the present application will be specifically explained in this example. As shown in fig. 5 and 6, the LED display screen disclosed in this embodiment includes a substrate and a bare lamp bead 2; the circuit pattern 3 is distributed on the substrate; the naked lamp beads 2 are arranged on the substrate in an array manner; this naked lamp pearl 2 is naked lamp pearl 2 shown in above-mentioned embodiment 1.
The circuit pattern 3 includes a power supply pad (not shown), a signal pad 33, and a power supply line 31; the power supply line 31 includes a plurality of first power supply lines 31a and second power supply lines 31b of opposite polarities; the power supply pad connects the first power supply line 31a and the second power supply line 31b;
the first power supply pin 212 is directly or indirectly connected to the first power supply line 31a, and the second power supply pin 213 is directly or indirectly connected to the second power supply line 31b;
a plurality of bare lamp beads 2 are connected in series to form a lamp bead string, and each lamp bead string is correspondingly provided with two signal bonding pads 33 which are respectively called as a first signal bonding pad 331 and a second signal bonding pad 332;
in the lamp bead string, a signal pin 211 of an input signal of a first bare lamp bead 2 is connected to a first signal pad 331, and a short-circuit pin 214 of the input signal of the first bare lamp bead 2 is connected to a second signal pad 332; or, the signal pin 211 of the input signal of the first bare lamp bead 2 is connected to the second signal pad 332, and the short-circuit pin 214 of the input signal of the first bare lamp bead 2 is connected to the first signal pad 331;
the signal pins 211 of the input signals of the rest of the bare lamp beads 2 are connected to the short circuit pin 214 of the output signal of the previous bare lamp bead 2, and the short circuit pin 214 of the input signal of each bare lamp bead 2 is connected to the signal pin 211 of the output signal of the previous bare lamp bead 2; the signal pin 211 of the output signal of each bare lamp bead 2 is connected to the short circuit pin 214 of the input signal of the next bare lamp bead 2, and the short circuit pin 214 of the output signal of each bare lamp bead 2 is connected to the signal pin 211 of the input signal of the next bare lamp bead 2.
Regarding the signal connection mode between the bare lamp beads 2, a signal line 32 known to those skilled in the art may be used to connect the signal pad and the bare lamp beads 2. As a preferable mode, it is unknown that the bare lamp bead 2 is bound and connected with a signal pad, or a short-circuit pad, or the bare lamp beads 2 in front of and behind the signal pad, or the short-circuit pad, through a signal jumper 321.
In this way, one row of the lamp string can be changed into two rows of the lamp string controlled by the two control signals. For example, an odd number of bare beads 2 in the bead string transmit control signals from the first signal pad 331; an even number of bare lamp beads 2 in the lamp bead string transmit a control signal from the second signal pad 332; and vice versa. Just because of the special binding connection mode, two signals in the first signal pad 331 and the second signal pad 332 are always transmitted in the adjacent bare lamp bead 2 or are short-circuited and do not pass through the inside of the bare lamp bead 2.
As described further below, the control signal input in the first signal pad 331 is assumed to be a first control signal, and the control signal input in the second signal pad 332 is assumed to be a second control signal; as shown in fig. 6, still taking the first column of bare lamp beads 2 as an example, the first signal pad 331 is bound to the short-circuit pin 214 of the input signal connected to the first column of bare lamp beads 2 in the first row; the second signal pad 332 is bound to the signal pins 211 of the input signal of the first row of bare lamp beads 2 in the first column, so that the first control signal transmitted in the first signal pad 331 is short-circuited in the first row of bare lamp beads 2 in the first column to the signal pins 211 of the input signal of the second row of bare lamp beads 2 in the first column, and does not pass through the inside of the first row of bare lamp beads 2 in the first column; the second control signal transmitted in the second signal pad 332 passes through the first row of bare lamp beads 2 in the first column, the second control signal controls the on and off of the first row of bare lamp beads 2 in the first column, and the second control signal is transmitted to the short circuit pin 214 of the input signal of the first row of bare lamp beads 2 in the first column. Analogize from this, first row of naked lamp pearl 2 of second line is imported first control signal from input signal's signal pin 211, control the bright and dim of first row of naked lamp pearl 2 to export the short circuit pin 214 of first row of naked lamp pearl 2's input signal from output signal's signal pin 211, second control signal is at first row of naked lamp pearl 2 by the short circuit not through inside. By analogy, first control signal passes through naked lamp pearl 2 in the even number row in proper order, and the bright of naked lamp pearl 2 goes out in the control even number row to by the short circuit transmission in naked lamp pearl 2 in the odd number row. The second control signal passes through naked lamp pearl 2 in the odd number row in proper order, controls the bright of naked lamp pearl 2 in the odd number row and goes out to by the short circuit transmission in naked lamp pearl 2 in the even number row. Of course, the opposite is also possible.
Through this kind of mode, can increase the quantity that naked lamp pearl 2 concatenates in a line or a string of lamp cluster. Through this kind of mode, the quantity of naked lamp pearl 2 in its lamp pearl cluster is 2 times of LED lamp pearl in conventional lamp string.
The substrate may be any of various substrates known to those skilled in the art, such as an opaque substrate or a transparent substrate 1. In this example, the transparent substrate 1 is preferably used. At this time, the LED display screen is a transparent LED display screen.
The bare lamp beads 2 are bound and connected to the transparent substrate 1 in a COG (chip on glass) mode. The COG method is a method in which a chip is directly bonded to the transparent substrate 1. As is well known to those skilled in the art.
In this example, the transparent substrate 1 on which the bare lamp beads 2 are arranged is provided with an encapsulating layer 5, and the bare lamp beads 2 are encapsulated in the encapsulating layer 5; and a protective cover plate 4 is arranged on the upper surface of the glue filling layer 5. The design of the potting layer 5 and the protective cover 4 is well known to those skilled in the art and will not be described in detail.
The power supply lines 31 comprise a plurality of first power supply lines 31a and second power supply lines 31b which are arranged at intervals in rows or columns; a plurality of rows or columns of bare lamp beads 2 are arranged between the first power supply line 31a and the second power supply line 31b; the bare lamp beads 2 share the first power supply line 31a and the second power supply line 31b. For example, as shown in fig. 7, a first power supply line 31a, a second power supply line 31b, and a first power supply line 31a are provided at intervals; 4 rows and 4 columns of bare lamp beads 2 are arranged between the first power supply line 31a and the second power supply line 31b on the left side; the bare lamp beads 2 in the 4 rows and the 4 columns share the first power supply line 31a and the second power supply line 31b. 4 rows and 4 columns of bare lamp beads 2 are also arranged between the first power supply line 31a and the second power supply line 31b on the right side; the bare lamp beads 2 in the 4 rows and the 4 columns share the first power supply line 31a and the second power supply line 31b on the right side.
By adopting the mode, the bare lamp beads 2 in a plurality of rows or a plurality of lines can share the power supply circuit 31 with the same polarity, and the LED display screens with large areas can be manufactured by the circular arrangement. A plurality of naked lamp pearl 2 sharing power supply line 31 can reduce the quantity of power supply line 31, reduces the blockking to the sight, is favorable to improving the transparency of display screen.
The present application is not limited to the implementation of the power supply line 31, and the implementation manner known to those skilled in the art may be adopted, the number of the first power supply line 31a and the number of the second power supply line 31b may be only one, or may be multiple, and the number of the first power supply line 31a and the number of the second power supply line 31b may be the same, or may be different. The specific number is determined according to the power supply capacity of the power supply line 31 and the power current demand of the bare lamp beads 2 between the first power supply line 31a and the second power supply line 31b.
The power supply wire 31 may be in the form of a straight line, a curved line, a serpentine line segment, or the like. As a preferable mode, each power supply line 31 is generally arranged in a row or a column, and the implementation mode is not limited as long as it can supply power. For example, it may be implemented by a metal layer etched on the transparent substrate 1, or a metal mesh, or a nano silver plating film or an ITO plating film, or a metal wire laid out in a patent previously applied by the applicant, or a metal sheet embedded in the transparent substrate 1.
The first power supply pin 212 on each bare lamp bead 2 is bound and connected to a first power supply circuit through a power supply jumper 311, or the first power supply pin 212 on the bare lamp bead 2 adjacent to the first power supply circuit; the second power supply pin 213 on each bare lamp bead 2 is bound and connected to a second power supply circuit through a power supply jumper 311, or the second power supply pin 213 on the bare lamp bead 2 adjacent to the second power supply circuit; each naked lamp pearl 2 can be directly got the electricity from the power supply line, or get the electricity from its neighbouring naked lamp pearl 2.
The power supply jumper 311 and the signal jumper 321 in this example are binding wires or bonding wires understood by those skilled in the art, and are only distinguished devices and are named separately. The transparency of the transparent LED display screen can be effectively improved by adopting the modes of the power supply jumper 311 and the signal jumper 321. The power supply jumper wire 311 and the signal jumper wire 321 are preferably 15-70 μm in diameter, are made of gold wires, copper wires or alloy wires, and are hardly visible to naked eyes due to small diameters, so that the blocking of sight lines is reduced while the requirement for the working current of the connected bare lamp beads 2 is met, and the transparency of products is improved.
Although the power supply jumper 311 and the signal jumper 321 are crossed in the schematic diagram, in the actual production process, wire bonding is performed at different heights, and then the wires are fixed in a glue filling manner, so that the situation of collapse and short circuit cannot occur.
The utility model discloses a LED display screen, because bare lamp pearl 2 that its array was arranged adopts no shell structure, consequently can reduce bare lamp pearl 2's size. A pair of signal pins and a pair of short-circuit pins 214 are directly arranged on the driving chip 21, so that the bare lamp bead 2 can receive two groups of control signals, when one group of control signals are input and output from the signal pins, the control signals pass through an internal circuit of the driving chip 21, control the on and off of the light-emitting wafer 20 and transmit the control signals to the next bare lamp bead 2; when the other set of control signals are input and output through the short-circuit pin 214, the control signals are directly transmitted to the next bare lamp bead 2 without passing through the internal circuit of the driving chip 21. Each naked lamp pearl 2 both insert the 2 nd control signal of naked lamp pearl 2 output in upper reaches and carry out work, and the signal transmission medium of last naked lamp pearl 2 is again simultaneously, and the control signal of last naked lamp pearl 2 does not pass through this naked lamp pearl 2 and directly transmits for next naked lamp pearl 2. So, when concatenating this kind of naked lamp pearl 2 and forming the lamp pearl cluster for two sets of control signal intervals are in the effect of lamp pearl cluster, and the interval transmission in naked lamp pearl 2 clusters. The length of the lamp bead string can be effectively increased by the mode, so that the size of the LED display screen can be increased when the LED display screen is applied to the LED display screen.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A bare lamp bead is characterized in that the bare lamp bead comprises a driving chip and a light-emitting wafer; the light emitting chip is mounted on the driving chip;
the driving chip is provided with a pair of power supply pins, a pair of signal pins and a pair of short-circuit pins;
the signal pins comprise a first signal pin and a second signal pin, the first signal pin and the second signal pin pass through the internal circuit of the driving chip, and a control signal for controlling the on and off of the light-emitting wafer passes through the internal circuit of the driving chip and is transmitted to a next bare lamp bead;
the short circuit pins comprise a first short circuit pin and a second short circuit pin; first short circuit pin with short circuit between the second short circuit pin controls the control signal that the bright control of emitting wafer goes out does not pass through driver chip's internal circuit to next naked lamp pearl transmission.
2. The bare lamp bead according to claim 1, wherein a color pin is arranged on the bare lamp bead, and the color pin is electrically connected with the light emitting wafer respectively.
3. The LED display screen of claim 1, wherein the light emitting chip is mounted on the driving chip by CSP or COC.
4. An LED display screen is characterized by comprising a substrate and a bare lamp bead; the substrate is provided with a circuit pattern; the naked lamp bead array is arranged on the substrate;
the circuit pattern comprises a power supply pad, a signal pad and a power supply line; the power supply lines comprise a plurality of first power supply lines and second power supply lines with opposite polarities; the power supply pad is connected with the first power supply circuit and the second power supply circuit;
the naked lamp bead comprises a driving chip and a light-emitting wafer; the light emitting chip is mounted on the driving chip; the driving chip is provided with more than one pair of power supply pins, a pair of signal pins and a pair of short-circuit pins;
the power supply pins comprise a first power supply pin and a second power supply pin; the first power supply pin is directly or indirectly connected to the first power supply circuit, and the second power supply pin is directly or indirectly connected to the second power supply circuit;
the signal pins comprise a first signal pin and a second signal pin, and an internal circuit of the driving chip passes between the first signal pin and the second signal pin; a control signal for controlling the on-off of the light-emitting wafer passes through an internal circuit of the driving chip and is transmitted to a next bare lamp bead;
the short circuit pins comprise a first short circuit pin and a second short circuit pin; the first short-circuit pin and the second short-circuit pin are in short circuit; the control signal for controlling the on-off of the light-emitting wafer does not pass through an internal circuit of the driving chip and is transmitted to a next bare lamp bead;
the bare lamp beads are connected in series to form a lamp bead string, and each lamp bead string is correspondingly provided with two signal bonding pads which are respectively called a first signal bonding pad and a second signal bonding pad;
in the lamp bead string, a signal pin of an input signal of a first bare lamp bead is connected to a first signal bonding pad, and a short-circuit pin of the input signal of the first bare lamp bead is connected to a second signal bonding pad; or a signal pin of an input signal of the first bare lamp bead is connected to the second signal pad, and a short-circuit pin of the input signal of the first bare lamp bead is connected to the first signal pad;
the signal pins of the input signals of the other bare lamp beads are connected to the short-circuit pin of the output signal of the previous bare lamp bead, and the short-circuit pin of the input signal of each bare lamp bead is connected to the signal pin of the output signal of the previous bare lamp bead; the signal pin of the output signal of each bare lamp bead is connected to the short circuit pin of the input signal of the next bare lamp bead, and the short circuit pin of the output signal of each bare lamp bead is connected to the signal pin of the input signal of the next bare lamp bead.
5. The LED display screen of claim 4, wherein the substrate is a transparent substrate.
6. The LED display screen of claim 5, wherein the bare lamp beads are bound and connected to the transparent substrate in a COG manner.
7. The LED display screen of claim 5, wherein a potting layer is disposed on the transparent substrate on which the bare lamp beads are disposed, the potting layer encapsulating each of the bare lamp beads therein; and a protective cover plate is arranged on the upper surface of the glue filling layer.
8. The LED display screen of claim 5, wherein the bare lamp beads are bound and connected with the signal bonding pad, or the short-circuit bonding pad or the bare lamp beads in front of and behind the signal bonding pad through signal jumpers.
9. The LED display screen of claim 5, wherein the first power supply pin on each bare lamp bead is bound and connected to a first power supply line or a first power supply pin on an adjacent bare lamp bead through a power supply jumper; the second power supply pin on each bare lamp bead is bound and connected to a second power supply circuit or a second power supply pin on an adjacent bare lamp bead through a power supply jumper; each naked lamp bead can be directly taken from the power supply circuit or taken from the adjacent naked lamp beads.
10. The LED display screen according to claim 8 or 9, wherein the diameters of the power supply jumper and the signal jumper are 15 μm-70 μm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110955671.3A CN115713899A (en) | 2021-08-19 | 2021-08-19 | Naked lamp pearl and LED display screen |
| PCT/CN2022/113198 WO2023020562A1 (en) | 2021-08-19 | 2022-08-18 | Bare lamp bead and led display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110955671.3A CN115713899A (en) | 2021-08-19 | 2021-08-19 | Naked lamp pearl and LED display screen |
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| Publication Number | Publication Date |
|---|---|
| CN115713899A true CN115713899A (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110955671.3A Pending CN115713899A (en) | 2021-08-19 | 2021-08-19 | Naked lamp pearl and LED display screen |
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| Country | Link |
|---|---|
| CN (1) | CN115713899A (en) |
| WO (1) | WO2023020562A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210167054U (en) * | 2019-06-10 | 2020-03-20 | 深圳市晶泓科技有限公司 | LED lamp bead and transparent LED display screen |
| CN209729385U (en) * | 2019-06-19 | 2019-12-03 | 大连集思特科技有限公司 | A kind of high density transparency LED display screen |
| CN111341247A (en) * | 2019-07-31 | 2020-06-26 | 深圳市晶泓科技有限公司 | Drive chip, LED lamp and LED display screen |
| CN110416171A (en) * | 2019-09-05 | 2019-11-05 | 东莞市欧思科光电科技有限公司 | Integrated photo-electronic display unit and its manufacture craft, electro-optical display device |
| CN110600463A (en) * | 2019-10-09 | 2019-12-20 | 深圳韦侨顺光电有限公司 | Integrated packaging LED display panel based on chip stacking |
| CN111554204A (en) * | 2020-06-08 | 2020-08-18 | 深圳市海柏恩科技有限公司 | Transparent LED display screen of high contrast |
| CN111768721A (en) * | 2020-07-22 | 2020-10-13 | 大连集思特科技有限公司 | LED lamp pearl of four-wire inner seal IC with two-way data transmission |
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2021
- 2021-08-19 CN CN202110955671.3A patent/CN115713899A/en active Pending
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- 2022-08-18 WO PCT/CN2022/113198 patent/WO2023020562A1/en unknown
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| WO2023020562A1 (en) | 2023-02-23 |
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