CN219303266U

CN219303266U - LED backlight module

Info

Publication number: CN219303266U
Application number: CN202223431090.9U
Authority: CN
Inventors: 王文波; 何艳; 李万强; 余绍恒; 周海浪
Original assignee: Guangzhou Changjia Electronic Co ltd
Current assignee: Guangzhou Changjia Electronic Co ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-07-04
Anticipated expiration: 2032-12-21

Abstract

The utility model discloses an LED backlight module, which comprises a substrate, wherein a control area and a display area are arranged on the substrate, and a plurality of display areas are arranged in the display area; a second circuit layer is arranged in the substrate, and a third circuit layer is arranged on the back surface of the substrate; the control area is internally provided with a first driving chip, the back surface of the substrate is provided with a plurality of second driving chips, and any display area is internally provided with at least one third driving chip; the display subarea are arranged in an array mode to form a plurality of rows of display groups, the second driving chips are correspondingly arranged at the positions of the rows of display groups, and the second driving chips are electrically connected with the third driving chips in the corresponding display groups; the first driving chip is electrically connected with the second driving chip based on the second circuit layer and the third circuit layer. The backlight module is provided with the circuit layer inside the substrate by arranging the second driving chip on the back of the substrate, so that the overall circuit arrangement structure is simplified, the heat dissipation effect of the driving chip is improved, and the service life of the module is prolonged.

Description

LED backlight module

Technical Field

The utility model mainly relates to the technical field of LED display, in particular to an LED backlight module.

Background

The LED backlight zone dimming technology is capable of independently controlling the display condition of a designated area and regulating the backlight color or brightness in the area according to the display image requirement, so that the display screen can achieve the effect of high resolution.

The current LED backlight partition regulation and control technology needs to set driving chips in each partition, and each driving chip is connected through a control chip to carry out signal transmission, so that the circuit arrangement structure in the LED backlight module is complex, and the wiring difficulty is high. In addition, the circuit arrangement of the conventional LED backlight module is concentrated on the front surface of the substrate, and a plurality of driving chips can only radiate heat through the circuit layer on the front surface of the substrate when working, so that the heat radiation effect of the module is poor, and the service life of the LED backlight module is influenced.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides the LED backlight module, which can simplify the whole circuit arrangement structure, improve the heat dissipation effect of the driving chip and prolong the service life of the LED backlight module by arranging the second driving chip on the back of the substrate and arranging the circuit layer in the substrate for connection.

The utility model provides an LED backlight module, which comprises a substrate, wherein a control area and a display area are arranged on the substrate, and a plurality of display areas are arranged in the display area;

a second circuit layer is arranged in the substrate, and a third circuit layer is arranged on the back surface of the substrate;

a first driving chip is arranged in the control area, a plurality of second driving chips are arranged on the back surface of the substrate, and at least one third driving chip is arranged in any display area;

the display subarea are arranged in an array mode to form a plurality of rows of display groups, the second driving chips are correspondingly arranged at the positions of the rows of display groups, and the second driving chips are electrically connected with the third driving chips in the corresponding display groups;

the first driving chip is electrically connected with the second driving chip based on the second circuit layer and the third circuit layer.

Further, a first circuit layer is arranged on the front surface of the substrate, and display partitions of any row of display groups form common electrode connection based on the first circuit layer.

Furthermore, the front surface of the substrate is also provided with a bus, and the plurality of display partitions are accessed to the bus based on the first circuit layer.

Further, a control chip is arranged in the control area and is electrically connected with the first driving chip.

Further, a plurality of first LED devices and second LED devices are arranged in the display partition, and the third driving chip is electrically connected with the first LED devices and the second LED devices.

Further, the second circuit layer includes a plurality of first wirings arranged along a row direction, and the plurality of first wirings are correspondingly disposed at positions of the plurality of display groups.

Further, the plurality of second driving chips are arranged at corresponding positions of the plurality of display groups;

any one of the second driving chips is arranged at the middle position of the corresponding position of the display group.

Further, the first wiring includes a plurality of connecting wires, one ends of the connecting wires are connected to driving connection pins of the second driving chip, and the other ends of the connecting wires are correspondingly connected to signal input ends of the third driving chip.

Further, the second circuit layer further comprises second wiring lines arranged along the column direction, and the second wiring lines are positioned at positions corresponding to the control areas;

one end of the second wiring is electrically connected with the first driving chip.

Further, the second driving chip is electrically connected to the other end of the second wiring based on the third circuit layer.

The utility model provides an LED backlight module, which is characterized in that a second driving chip is arranged on the back surface of a substrate, and a circuit layer is arranged in the substrate for connection, so that the overall circuit arrangement structure can be simplified, the heat dissipation effect of the driving chip is improved, and the service life of the LED backlight module is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an LED backlight module according to an embodiment of the utility model;

FIG. 2 is a schematic diagram showing a partition structure in an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a second circuit layer structure according to an embodiment of the utility model;

FIG. 4 is a schematic diagram of a third circuit layer structure according to an embodiment of the utility model;

fig. 5 is a schematic diagram of a matching state of the second circuit layer and the third circuit layer in an embodiment of the utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Fig. 1 shows a schematic structural diagram of an LED backlight module in an embodiment of the present utility model, where the LED backlight module includes a substrate 1, the substrate 1 includes a display area 12 and a control area 11, the display area 12 is located in a middle position of the substrate 1, the control area 11 is wrapped on a side edge of the display area 12, a plurality of display partitions 4 are disposed in the display area 12, and the plurality of display partitions 4 are arrayed in the display area 12.

Specifically, a control chip 2 and a first driving chip 3 are arranged in the control area 11, the control chip 2 is electrically connected with a signal input end of the first driving chip 3 based on bonding wires, the control chip 2 and the first driving chip 3 are connected in series with an access circuit, a signal connection port is arranged on the side wall of the display screen and used for being connected with an external display signal source, the control chip 2 is connected with the signal connection port based on a connecting wire, and the control chip 2 receives an image display signal of the external display signal source based on the connecting wire.

Further, the control chip 2 obtains the image display signals sent by the external display signal source, and prepares the image display signals according to the number of display units in the display area 12 to generate image display information of the LED backlight module, the control chip 2 sends the image display information to the first driving chip 3, and the first driving chip 3 can perform image display information partition processing according to the image display information and the arrangement of the display groups in the display area 12, so as to generate partition display signals.

Specifically, the back of the substrate 1 is provided with a plurality of second driving chips 5, the plurality of second driving chips 5 are electrically connected with the first driving chips 3, the first driving chips 3 can send the partition display signals to the plurality of second driving chips 5, and the second driving chips 5 are used for performing lighting regulation and control on the display partitions 4 in the display group.

Further, the display partitions 4 are arranged in an array to form a plurality of display groups, the second driving chips 5 are correspondingly arranged at the positions of the display groups, at least one third driving chip 41 is arranged in any display partition 4, and the second driving chips 5 are electrically connected with the third driving chips 41 in the corresponding display groups.

Specifically, the front surface of the substrate 1 is provided with a first circuit layer 13, and the display partitions 4 are connected in a common electrode mode based on the first circuit layer 13, and according to actual wiring requirements, the display partitions 4 can be connected in a common cathode mode or in a common anode mode, so that circuit arrangement can be simplified, and display regulation and control are conveniently carried out on the display partitions 4.

Further, a bus 16 is disposed on the front surface of the substrate 1, the plurality of display partitions 4 are connected to the bus 16 based on the first circuit layer 13, and the control chip 2 is connected to the bus 16 based on a connection line, so as to form a closed loop.

Specifically, fig. 2 shows a schematic diagram of a display partition structure in an embodiment of the present utility model, at least two LED devices are disposed in any one display partition 4, the third driving chip 41 is electrically connected to the LED devices, and the third driving chip 41 is used for driving the LED devices to light.

Specifically, referring to fig. 2, in the present embodiment, the display area 4 includes a third driving chip 41, a first LED device 42 and two second LED devices 43, the first LED device 42 is disposed between the two second LED devices 43, a plurality of driving connection pins are disposed on the third driving chip 41, and the first LED device 42 and the second LED device 43 are connected to the driving connection pins of the third driving chip 41 based on the connection lines.

Specifically, an LED lamp bead is disposed on the first LED device 42, two LED lamp beads are disposed on the second LED device 43, the first LED device 42 is a red light device, that is, the light color emitted by the LED lamp bead on the first LED device 42 is red, and the second LED device 43 is a blue-green device, that is, the light color emitted by the two LED lamp beads of the second LED device 43 is blue and green, respectively.

Further, a display unit is formed between the first LED device 42 and any one of the adjacent second LED devices 43, that is, two display units may be formed in the display area 4, and the third driving chip 41 is a dynamic driving chip, so that the two display units may be sequentially scanned and driven.

Further, the third driving chip 41 is provided with a signal input terminal for receiving a driving signal.

Specifically, fig. 3 shows a schematic diagram of a second circuit layer structure in the embodiment of the present utility model, where a second circuit layer 14 is disposed in the substrate 1, the second circuit layer 14 includes a plurality of rows of first wires 141 arranged along a row direction and second wires 142 arranged along a column direction, the first wires 141 are located at positions corresponding to the display area 12, and the second wires 142 are disposed at positions corresponding to the control area 11.

Specifically, the first wiring 141 includes a plurality of connection wires, one end of each of the plurality of connection wires is connected to a driving connection pin of the second driving chip 5, the other end of each of the plurality of connection wires is correspondingly connected to a signal input end of the third driving chip 41, and the second driving chip 5 may transmit a driving signal to the third driving chip 41 based on the second circuit layer 14.

Specifically, one end of the second wire 142 is connected to the driving pin of the first driving chip 3, and by setting the second wire 142, connection convenience between the plurality of second driving chips 5 and the first driving chip 3 can be improved, so that the circuit arrangement of the LED backlight module is simplified.

Further, by disposing the second circuit layer 14 inside the substrate 1, the circuit arrangement of the substrate 1 is simplified, and connection between the driving chip and the LED device is facilitated on the substrate 1.

Further, one ends of the plurality of connection wires on the first wiring 141 are concentrated at the middle position of the display group, that is, the second driving chip 5 is correspondingly disposed at the middle position of the display group, so as to be electrically connected with each third driving chip 41 in the display group, and the plurality of connection wires are symmetrically distributed with the second driving chip 5 as a center, so that the arrangement of the second circuit layer 14 is facilitated, and the preparation efficiency of the display screen is improved.

Further, by arranging the second circuit layer 14, the first driving chip 3 and the second driving chip 5 on the front surface of the substrate 1 are connected with the circuit arrangement at the bottom of the substrate 1, so that the heat dissipation paths of the first driving chip 3 and the second driving chip 5 are increased, and the heat dissipation capability of the driving chip of the LED backlight module is improved.

Specifically, fig. 4 shows a schematic diagram of a third circuit layer structure in the embodiment of the present utility model, fig. 5 shows a schematic diagram of a matching state of the second circuit layer and the third circuit layer in the embodiment of the present utility model, a third circuit layer 15 is disposed on the back surface of the substrate 1, the third circuit layer 15 includes a plurality of connection wires arranged along a row direction, one end of any connection wire is connected to a signal input end of the second driving chip 5, and the other end of the connection wire is connected to the other end of the second wiring 142.

Specifically, the first driving chip 3 is electrically connected to the third circuit layer 15 based on the second wiring 142, that is, the first driving chip 3 may be electrically connected to the second driving chip 5 based on the second circuit layer 14 and the third circuit layer 15, and the first driving chip 3 may send a driving signal to the second driving chip 5, so as to implement that the first driving chip 3 regulates the driving operation of the second driving chip 5.

Specifically, the working principle of the LED backlight module is as follows: the first driving chip 3 obtains display image information, the first driving chip 3 performs partition processing on the display image to generate partition display signals of each display group, the first driving chip 3 sends a plurality of partition display signals to the second driving chip 5 based on the connection bus 16, the second driving chip 5 performs allocation according to each display partition 4 according to the received partition display signals to generate partition driving signals and sends the partition driving signals to the third driving chip 41 based on the second circuit layer 14, and the third driving chip 41 drives and lights the first device and the second device in the display partition 4 according to the received partition driving signals, so that display of the image is realized.

Further, through setting up subregion drive control, can be provided with a plurality of LED lamp pearls in every display subregion 4, through setting up first driver chip 3, second driver chip 5 and third driver chip 41, be convenient for carry out the regulation and control that lights to the LED lamp pearl in the display subregion 4, carry out circuit integration with a plurality of display subregions 4, simplify the circuit and arrange, be convenient for carry out subregion display drive control.

According to the LED backlight module, the plurality of driving chips are arranged, the LED display area 12 is controlled in a grading and partition mode, the display effect of the LED backlight module is improved, the second driving chip 5 is arranged on the back surface of the substrate 1, and the circuit layers are arranged in the substrate 1 for connection, so that the overall circuit arrangement structure can be simplified, the heat dissipation effect of the driving chips is improved, and the service life of the LED backlight module is prolonged.

In addition, the above description is made in detail on an LED backlight module provided by the embodiment of the present utility model, and specific examples should be adopted herein to illustrate the principles and embodiments of the present utility model, where the description of the above embodiments is only for helping to understand the method and core ideas of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims

1. The LED backlight module is characterized by comprising a substrate, wherein a control area and a display area are arranged on the substrate, and a plurality of display areas are arranged in the display area;

2. The LED backlight module of claim 1, wherein a first circuit layer is disposed on the front surface of the substrate, and the display sections of any one row of the display groups form a common electrode connection based on the first circuit layer.

3. The LED backlight module of claim 2, wherein the front side of the substrate is further provided with a bus, and the plurality of display partitions are connected to the bus based on the first circuit layer.

4. The LED backlight module of claim 1, wherein a control chip is disposed in the control region, and the control chip is electrically connected to the first driving chip.

5. The LED backlight module of claim 1, wherein a plurality of first LED devices and second LED devices are disposed in the display area, and the third driving chip is electrically connected to the first LED devices and the second LED devices.

6. The LED backlight module of claim 1, wherein the second circuit layer comprises a plurality of first wirings arranged along a row direction, and the plurality of first wirings are correspondingly arranged at the positions of the plurality of display groups.

7. The LED backlight module of claim 6, wherein a plurality of the second driving chips are disposed at corresponding positions of a plurality of the display groups;

8. The LED backlight module of claim 7, wherein the first wiring comprises a plurality of connection wires, one ends of the plurality of connection wires are connected to the driving connection pins of the second driving chip, and the other ends of the plurality of connection wires are correspondingly connected to the signal input ends of the plurality of third driving chips.

9. The LED backlight module of claim 6, wherein the second wiring layer further comprises second wirings arranged along a column direction, the second wirings being located at positions corresponding to the control regions;

10. The LED backlight module of claim 9, wherein the second driving chip is electrically connected to the other end of the second wiring based on the third wiring layer.