CN218277268U

CN218277268U - Display module, display screen and electronic equipment

Info

Publication number: CN218277268U
Application number: CN202221576449.9U
Authority: CN
Inventors: 吴模信; 董淑超; 于国华
Original assignee: Anhui Jingzhuo Optical Display Technology Co Ltd
Current assignee: Anhui Jingzhuo Optical Display Technology Co Ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2023-01-10
Anticipated expiration: 2032-06-22

Abstract

The utility model discloses a display module, display screen and electronic equipment, display module includes the substrate layer, metal circuit layer and a plurality of display element, the power supply line that every display element through setting up display module is connected, ground connection circuit, signal line are independent of other display element's corresponding circuit, and like this, every display element's circuit independent control can satisfy display module and set up metal circuit layer in the design of substrate layer single face to save two-sided copper and drilling process of covering. It is thus clear that adopt utility model's display module, display screen and electronic equipment, can simplify process flow, reduction in production cost.

Description

Display module, display screen and electronic equipment

Technical Field

The utility model relates to a show technical field, especially relate to a display module, display screen and electronic equipment.

Background

In a Mini LED (Light Emitting Diode) transparent display screen, a VDD (Virtual Device Driver) power line and a GND (Ground) Ground line of an LED are generally connected in a whole screen to reduce the line impedance and improve the brightness uniformity of the display screen, however, in this design scheme, the VDD and the GND and the lines connected to the VDD and the GND are respectively disposed on a Top layer and a Bottom layer of a substrate, so the substrate must adopt a double-sided wiring manner, and the substrate needs to be plated with copper on both sides and drilled with holes, which is complicated in manufacturing process and high in production cost.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model discloses display module, display screen and electronic equipment can simplify process flow, reduction in production cost.

In order to achieve the above object, in a first aspect, the present invention discloses a display module, including:

a substrate layer;

a metal circuit layer disposed on one side of the substrate layer, the metal circuit layer including a circuit region and a bonding region,

the circuit area comprises a plurality of groups of circuits, each group of circuits comprises a power circuit, a grounding circuit and a signal circuit, the power circuit, the grounding circuit and the signal circuit are connected to the bonding area,

the bonding area is used for connecting an external power supply and receiving an external control signal so as to supply power to each group of circuits and provide a control signal; and

a plurality of display units arranged in the circuit area, each display unit comprises a plurality of light emitting diodes arranged in sequence, each light emitting diode comprises a power supply pin, a grounding pin, a signal input pin and a signal output pin,

each display unit corresponds to one group of the circuits respectively, in the display unit, a power supply pin of each light emitting diode is connected in parallel with the power supply circuit in the corresponding group of the circuits, a grounding pin of each light emitting diode is connected in parallel with the grounding circuit in the corresponding group of the circuits, and the signal input pin and the signal output pin of each light emitting diode are sequentially connected in series through the signal circuits in the corresponding group of the circuits.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, in the plurality of light emitting diodes arranged in sequence in the display unit, a voltage difference between a first light emitting diode and a last light emitting diode is 0V to 0.2V.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the number of the light emitting diodes of the display unit is 100 to 180.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the display unit further includes a voltage regulator device, a positive terminal of the voltage regulator device is connected in parallel to the power line, a negative terminal of the voltage regulator device is connected in parallel to the ground line, and the ratio of the number of the voltage regulator device to the number of the light emitting diodes is 1.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the bonding area includes a plurality of groups of bonding ports, each of the bonding ports is correspondingly connected to the plurality of groups of the lines, and the bonding ports are used for bonding with the flexible circuit board.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the bonding port is provided with a plurality of connection pins, and the power line of the line of each group is connected to two of the connection pins, the ground line is connected to two of the connection pins, and the signal line is connected to one of the connection pins.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the number of connection pins of each bonding port is 30 to 80.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the thickness of the metal circuit layer is 20um to 50um.

In a second aspect, the present invention discloses a display screen, which comprises the display module according to the first aspect.

In a third aspect, the present invention discloses an electronic device, which comprises a device body and a display screen as described in the second aspect, wherein the display screen is connected to the device body.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the embodiment of the utility model provides a pair of display module, display screen and electronic equipment, power supply line, ground circuit, the signal line that every display element through setting up display module is connected are independent of other display element's corresponding circuit, and like this, every display element's circuit independent control can satisfy display module and set up the metal wiring layer in the design of substrate layer single face to save two-sided copper and drilling process of covering. Therefore, the technical process can be simplified and the production cost can be reduced by adopting the scheme of the embodiment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display module disclosed in an embodiment of the present application;

FIG. 2 is a schematic diagram of a display module according to an embodiment of the disclosure;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a schematic diagram of a set of circuits of a display module according to an embodiment of the disclosure;

FIG. 5 is an enlarged view at B in FIG. 4;

FIG. 6 is a schematic view of a display screen disclosed in an embodiment of the present application;

fig. 7 is a schematic diagram of an electronic device disclosed in an embodiment of the present application.

Description of the main reference numerals: 100. a display module; 10. a substrate layer; 20. a metal wiring layer; 21. a line area; 210. a line; 211. a power supply line; 212. a ground line; 213. a signal line; 22. a bonding area; 220. bonding the port; 221. connecting pins; 30. a display unit; 31. a light emitting diode; 31a, a first light emitting diode; 31b, a second light emitting diode; 311. a power supply pin; 312. a ground pin; 313. a signal input pin; 314. a signal output pin; 32. a voltage stabilizing device; 40. a flexible circuit board; 200. a display screen; 201. an apparatus main body; 300. an electronic device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following examples and drawings.

Please refer to fig. 1 to fig. 3 together, the first aspect, the present invention discloses a display module 100, including substrate layer 10, metal circuit layer 20 and a plurality of display unit 30, metal circuit layer 20 sets up in the one side of substrate layer 10, metal circuit layer 20 includes circuit area 21 and bonding area 22, circuit area 21 includes multiunit circuit 210, every group circuit 210 includes a power supply line 211, a ground connection line 212 and a signal line 213 (please refer to fig. 4), power supply line 211, ground connection line 212, signal line 213 is connected to bonding area 22, bonding area 22 is used for connecting external power source and accepts external control signal, in order to supply power and provide control signal to each group circuit 210. The plurality of display units 30 are disposed in the circuit area 21, each display unit 30 includes a plurality of light emitting diodes 31 arranged in sequence, each light emitting diode 31 includes a power pin 311, a ground pin 312, a signal input pin 313 and a signal output pin 314, each display unit 30 corresponds to one group of circuits 210, in the display unit 30, the power pin 311 of each light emitting diode 31 is connected in parallel to the power line 211 in the corresponding group of circuits 210, the ground pin 312 of each light emitting diode 31 is connected in parallel to the ground line 212 in the corresponding group of circuits 210, and the signal input pin 313 and the signal output pin 314 of each light emitting diode 31 are connected in series through the signal line 213 in the corresponding group of circuits 210.

As can be understood from fig. 5, in two adjacent light emitting diodes 31 of each display unit 30, one of the two adjacent light emitting diodes 31 is defined as a first light emitting diode 31a, and the other is defined as a second light emitting diode 31b, the power pins 311 of the first light emitting diode 31a and the second light emitting diode 31b are connected to the same power line 211, the ground pins 312 of the first light emitting diode 31a and the second light emitting diode 31b are connected to the same ground line 212, and the signal output pin 314 of the first light emitting diode 31a is connected to the signal input pin 313 of the second light emitting diode 31b through the signal line 213.

In the display module 100 provided by the embodiment, the power line 211, the ground line 212 and the signal line 213 connected to each display unit 30 of the display module 100 are independent of the corresponding lines 210 of other display units 30, so that the lines 210 of each display unit 30 are independently controlled, which not only can meet the functional requirements of the display module 100, but also is beneficial to troubleshooting of the display module 100, thereby improving the repair efficiency and reducing the rejection rate of products, and further reducing the production cost. Meanwhile, the circuit 210 of each display unit 30 is independently controlled, and when the structure of the display module 100 is designed, the metal circuit layer 20 may be disposed on one side or both sides of the substrate layer 10, that is, the embodiment can satisfy the design of disposing the metal circuit layer 20 of the display module 100 on one side of the substrate layer 10, so as to omit the processes of double-sided copper coating and drilling. Therefore, the technical process can be simplified and the production cost can be reduced by adopting the scheme of the embodiment.

In some embodiments, the substrate layer 10 may be any one of a glass substrate, PET (Polyethylene terephthalate), PI (Polyimide), and CPI (Colorless Polyimide). The substrate layer 10 serves as a substrate for supporting the metal wiring layer 20 and the display unit 30.

Further, the thickness of the substrate layer 10 may be 55um-188um, for example, may be 60um, 80um, 100um, 120um, 140um, 150um or 170um, so that it may be ensured that the substrate layer 10 has a sufficient thickness to support the metal wiring layer 20 and the display unit 30.

In some embodiments, the material of the metal circuit layer 20 may be any one of copper, aluminum, iron, or an alloy of copper and any one of nickel, gold, tin, and silver. In this way, the metal circuit layer 20 has good conductive performance, and the metal circuit layer 20 can conduct electricity for the display unit 30 and transmit a control signal, so that the display module 100 can light up or display a picture.

In some embodiments, considering that the problem of large line impedance exists when the metal line layer 20 is disposed on one side of the substrate layer 10, and the voltage difference between the first light emitting diode 31 and the last light emitting diode 31 of the display unit 30 is too large, so that the luminance of the display module 100 is not uniform, based on this, the line impedance and the voltage difference of the display module 100 are reduced and the luminance uniformity of the display module 100 is improved by reasonably configuring parameters such as the number of the light emitting diodes 31, the width and the length of the line 210, and the sheet resistance of the metal line layer 20 in each display unit 30.

Further, in the plurality of light emitting diodes 31 arranged in sequence in the display unit 30, the voltage difference between the first light emitting diode and the last light emitting diode is 0V-0.2V, and may be, for example, 0.1V, 0.15V, 0.18V, or 0.2V. Therefore, the voltage difference of each led 31 of the display module 100 can be effectively controlled to ensure the brightness uniformity of the display module 100 and improve the quality of the display module 100.

Further, the thickness of the metal circuit layer 20 is 20um-50um, such as 25um, 30um, 35um, 40um or 45um.

Thus, on the one hand, the line impedance can be reduced to reduce the voltage consumption of each light emitting diode 31, thereby reducing the voltage difference of each light emitting diode 31 of the display module 100, and on the other hand, the current carrying performance of the metal line layer 20 can be ensured, thereby improving the load capacity of the display module 100.

Specifically, in combination with the voltage difference of the display module 100 and the thickness limitation of the metal circuit layer 20, the number of the light emitting diodes 31 of each display unit 30 may be 100 to 180, for example, 120, 128, 130, 140, 150, or 160. By controlling the number of the light emitting diodes 31 of each display unit 30 within a reasonable range, the voltage consumption of the display unit 30 from the first light emitting diode to the last light emitting diode can be reduced under the condition that the metal circuit layer 20 has a sufficient thickness, so that the head-to-tail voltage difference of the display module 100 is reduced, the brightness difference between the first light emitting diode 31 and the last light emitting diode 31 is ensured to be small, and the brightness uniformity of the display module 100 is improved.

Referring to fig. 4 again, in some embodiments, the display unit 30 further includes a voltage regulator device 32, a positive terminal of the voltage regulator device 32 is connected in parallel to the power line 211, and a negative terminal of the voltage regulator device 32 is connected in parallel to the ground line 212. Therefore, on one hand, the voltage can be maintained stable, so that the display unit 30 has a stable voltage source, and on the other hand, the voltage can be controlled within a reasonable range, thereby avoiding the light emitting diode 31 from being burnt out due to overlarge voltage, and further protecting the normal work of the light emitting diode 31.

Further, the number ratio of the voltage stabilizing device 32 to the light emitting diode 31 is 1. For example, the number of the voltage regulator devices 32 and the light emitting diodes 31 is 1.

Therefore, on the premise that single-sided wiring (that is, the metal circuit layer 20 is disposed on a single side of the substrate layer 10) is satisfied, the voltage stability of the display unit 30 is improved, and the normal operation of the display unit 30 is protected. In addition, the cost of the display module 100 can be reduced.

In the present embodiment, the number of the light emitting diodes 31 in each display unit 30 is 150, and the number ratio of the voltage stabilizing device 32 to the light emitting diodes 31 is 1.

Further, the two voltage regulator devices 32 in each display unit 30 are respectively located before the first light emitting diode 31 and after the last light emitting diode 31. In this way, the voltage regulator devices 32 and the light emitting diodes 31 can be arranged in parallel, which is beneficial to the layout of the lines 210 of the display module 100, so that on one hand, the interference of the lines 210 caused by cross interference during wiring can be avoided, on the other hand, the size and the pixel spacing of the display unit 30 can be effectively controlled, and further, the resolution of the display module 100 can be improved.

Further, the voltage regulator device 32 may be a capacitor or a voltage regulator to achieve the effect of voltage regulation on the circuit 210. It will be appreciated that when the voltage regulation device 32 is a capacitor, the filtering characteristics of the capacitor are utilized to achieve the voltage regulation effect on the line 210.

In some embodiments, the bonding area 22 includes a plurality of sets of bonding ports 220, each set of bonding ports 220 has a plurality of connection pins 221, the connection pins 221 are correspondingly connected to the plurality of sets of traces 210, and the bonding ports 220 are bonded to the Flexible Circuit board 40 (FPC) through the connection pins 221 (see fig. 6).

Like this, the display module 100 is connected with the external power source through the flexible circuit board 40, and make the control signal pass through the flexible circuit board 40 in proper order, connect the pin 221, each group of circuit 210 transmits to the Emitting Diode 31 of the display unit 30, with the Light-on or the Light-off of controlling the Emitting Diode 31, thereby realize the picture display of the display module 100, or, when the Emitting Diode 31 is RGB LED (RGB Light-Emitting Diode, three-color Emitting Diode), control the Emitting Diode 31 to send the Light of different colors, thereby make the effect of picture display more clear and abundant, the color is more vivid and more vivid.

Further, the number of bonding ports 220 in display module 100 may be 2-8 groups, such as 3, 4, 5, or 6 groups. Thus, the number of flexible circuit boards 40 bound by the display module 100 is large, which is beneficial to controlling the display module 100 and reducing the electrical requirements for the flexible circuit boards 40 and the binding ports 220.

In some embodiments, considering that the current passing through the power line 211 and the ground line 212 in each group of lines 210 is relatively large, the required line impedance is small, and the resistance of the connection between the two connection pins 221 is relatively small compared to the resistance of one connection pin 221, based on this, the power line 211 of each group of lines 210 is connected to the two connection pins 221, the ground line 212 is connected to the two connection pins 221, and the signal line 213 is connected to one connection pin 221. Thus, the impedances of the power supply line 211 and the ground line 212 can be reduced, and the stability of the current can be improved to ensure the normal operation of the light emitting diode 31.

In some embodiments, as can be seen from the foregoing, the number of the light emitting diodes 31 of each display unit 30 is 100 to 180, the current of the line 210 of each display unit 30 can be calculated according to the current required by the normal operation of the light emitting diodes 31, and the FPC connector is selected according to the value, so as to ensure that the maximum allowable current of the PIN (connection PIN) of the FPC connector can meet the line current requirement of the display unit 30, thereby ensuring that the display unit 30 can normally display, and further improving the quality of the display module 100. Based on this, the number of connection pins 221 for each bonding port 220 is 30-80, and may be 30, 50, 60, or 80, for example. In addition, the PIN of the FPC connector corresponding to the number of the connection PINs 221 can satisfy the electrical requirement of the display module 100, that is, the maximum allowable current of the PIN is greater than or equal to the line current of the display unit 30, so that the normal display of the display unit 30 can be ensured.

In the present embodiment, for example, the display module 100 includes 5 groups of bonding ports 220, and the number of the connection pins 221 of each group of bonding ports 220 is 80, as can be seen from the foregoing, each group of circuits 210 is correspondingly connected to 5 connection pins 221, and each display unit 30 respectively corresponds to one group of circuits 210, that is, 1 display unit 30 is correspondingly connected to 5 connection pins 221, and thus, 1 group of bonding ports 220 is correspondingly connected to 16 display units 30, and one display module 100 includes 80 display units 30.

Referring to fig. 6, in a second aspect, the present invention provides a display screen 200, wherein the display screen 200 includes the display module 100 according to the first aspect. It can be understood that, since the display 200 includes the display module 100 of the first aspect, the display 200 has the advantages of the display module 100 of the first aspect, and thus, the detailed description thereof is omitted.

Referring to fig. 7, in a third aspect, the present invention provides an electronic device 300, the electronic device 300 includes a device main body 201 and a display 200 as described above in the second aspect, the display 200 is connected to the device main body 201. The electronic device 300 may be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a smart watch, a television, a car meter, a vehicle-mounted display, an advertisement screen, a movie screen, and the like. It can be understood that, since the electronic device 300 includes the display 200 of the second aspect, the electronic device 300 has the beneficial effects of the display 200 of the second aspect, and the details are not repeated herein.

The display module, the display screen and the electronic device disclosed by the embodiment of the invention are described in detail, and the principle and the implementation mode of the invention are explained by applying a specific example, and the description of the above embodiment is only used for helping to understand the display module, the display screen and the electronic device and the core idea thereof; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A display module, comprising:

a substrate layer;

2. The display module according to claim 1, wherein a difference between voltages of a first light emitting diode and a last light emitting diode among the plurality of light emitting diodes arranged in sequence in the display unit is 0V to 0.2V.

3. The display module of claim 1, wherein the number of light emitting diodes of the display unit is 100-180.

4. The display module according to claim 1, wherein the display unit further comprises a voltage regulator device, a positive terminal of the voltage regulator device is connected in parallel to the power line, a negative terminal of the voltage regulator device is connected in parallel to the ground line, and the ratio of the number of the voltage regulator device to the number of the light emitting diodes is 1.

5. The display module of claim 1, wherein the bonding area includes a plurality of sets of bonding ports, each of the bonding ports is correspondingly connected to the plurality of sets of lines, and the bonding ports are used for bonding with a flexible circuit board.

6. The display module of claim 5, wherein the bonding port has a plurality of connection pins, the power line of each set of the lines is connected to two of the connection pins, the ground line is connected to two of the connection pins, and the signal line is connected to one of the connection pins.

7. The display module of claim 6, wherein each of the bonding ports has a number of connection pins ranging from 30 to 80.

8. The display module according to any one of claims 1 to 7, wherein the metal wiring layer has a thickness of 20um to 50um.

9. A display screen, characterized in that the display screen comprises a display module according to any one of claims 1-8.

10. An electronic apparatus characterized in that the electronic apparatus comprises an apparatus main body and the display screen according to claim 9, the display screen being attached to the apparatus main body.