CN217739679U - Backlight module, display module and display device - Google Patents
Backlight module, display module and display device Download PDFInfo
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- CN217739679U CN217739679U CN202221995612.5U CN202221995612U CN217739679U CN 217739679 U CN217739679 U CN 217739679U CN 202221995612 U CN202221995612 U CN 202221995612U CN 217739679 U CN217739679 U CN 217739679U
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Abstract
The utility model discloses a backlight module, a display module and a display device, wherein the backlight module comprises a first drive plate, and a plurality of light-emitting elements are arranged on the first drive plate; the second driving board is connected with the first driving board, and a plurality of light-emitting elements are arranged on the second driving board; the second driving board and the first driving board are arranged in a laminated mode, and the second driving board comprises a plurality of openings exposing the light-emitting elements on the first driving board; and a backlight driving chip on the first driving board to provide driving signals to the light emitting elements on the first driving board and the light emitting elements on the second driving board, respectively. The embodiment of the utility model provides a backlight unit under equal area, can greatly increased light emitting component's quantity, can realize more partitions, increase the fine and smooth sense of display screen, improve the effect of local dimming, be favorable to realizing liquid crystal display's super high dynamic contrast.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a backlight unit, display module assembly and display device.
Background
With the rapid development of Liquid Crystal Display technology, liquid Crystal Displays (LCDs) are widely used in Display products such as mobile phones and computers due to their small size, thin thickness, light weight and low power consumption.
Currently, a liquid crystal display device generally includes a backlight module to provide backlight, and with the development of a High-Dynamic Range (HDR) technology, the backlight module generally uses a Local Dimming technology to perform brightness control on each region through a Local Dimming algorithm, so as to achieve the purpose of performing real-time brightness adjustment on the backlight. And the more the divided regions are, the better the local dimming effect is, and the higher dynamic contrast can be realized.
In order to increase more divided areas, the number of light emitting elements needs to be increased additionally, however, in the conventional backlight module, the problems of module space, light emitting element size, component assembly and the like are considered, so that the light modulation cannot be performed in a smaller local area, the light modulation effect is seriously affected, and the ultrahigh dynamic contrast cannot be realized.
SUMMERY OF THE UTILITY MODEL
The utility model provides a backlight module, display module assembly and display device to realize liquid crystal display's super high dynamic contrast.
According to the utility model discloses an aspect provides a backlight module, include:
a first driving board on which a plurality of light emitting elements are disposed;
a second driving board connected to the first driving board, the second driving board having a plurality of light emitting elements disposed thereon; wherein the second driving board is stacked with the first driving board, and the second driving board includes a plurality of openings exposing the light emitting elements on the first driving board;
and the backlight driving chip is positioned on the first driving board and used for respectively providing driving signals for the light-emitting elements on the first driving board and the light-emitting elements on the second driving board.
Optionally, the first driving board comprises a first connecting portion, the second driving board comprises a second connecting portion, and the first connecting portion is electrically connected with the second connecting portion;
the light emitting elements on the first driving board are connected with the backlight driving chip, and the light emitting elements on the second driving board are connected with the second connecting part.
Optionally, in a thickness direction of the backlight module, a vertical distance h between an upper surface of the first driving board and an upper surface of the second driving board is less than or equal to a + b, where a is a thickness of the second driving board, and b is a thickness of the light emitting element on the first driving board.
Optionally, the driving current of the light emitting elements on the second driving board is equal to 6.25 times the driving current of the light emitting elements on the first driving board.
Optionally, the first driving board comprises a printed circuit board, and the second driving board comprises a flexible circuit board.
According to the utility model discloses an on the other hand provides a display module assembly, include the utility model discloses the backlight unit that arbitrary embodiment provided, display module assembly still includes:
the display panel is positioned on the light-emitting side of the backlight module;
and the main control chip is used for respectively providing control signals for the backlight module and the display panel.
Optionally, the main control chip includes a content analysis module, a backlight control module, a data conversion module, and a source driver module;
the content analysis module is respectively connected with the input end of the backlight control module and the input end of the data conversion module, the output end of the backlight control module is connected with the backlight driving chip, the output end of the data conversion module is connected with the input end of the source electrode driving module, and the output end of the source electrode driving module is connected with the display panel.
Optionally, the display module further includes a supporting layer, the supporting layer is located on one side of the display panel close to the backlight module, the main control chip is located at an end of the supporting layer, and the main control chip is connected to the display panel and the backlight driving chip respectively; alternatively, the first and second electrodes may be,
the backlight driving chip is integrated inside the main control chip, and the main control chip is arranged on the first driving board.
Optionally, the display module further includes a touch electrode layer and a color film substrate, the touch electrode layer is located on one side of the display panel away from the backlight module, and the color film substrate is located on one side of the touch electrode layer away from the backlight module.
According to the utility model discloses an on the other hand provides a display device, include the utility model discloses arbitrary embodiment provides a display module assembly.
In the technical scheme provided by this embodiment, a first driving board and a second driving board which are stacked up and down are arranged in a backlight module, a plurality of light emitting elements are respectively arranged on the first driving board and the second driving board, and a plurality of openings capable of exposing the light emitting elements on the first driving board are arranged on the second driving board, so that the light emitting elements on the first driving board can be turned on through the openings, and the light emitting elements are not interfered with each other; the backlight driving chip respectively provides driving signals for the light-emitting elements on the first driving board and the light-emitting elements on the second driving board, and local dimming is achieved. For backlight unit among the prior art, the embodiment of the utility model provides a backlight unit under equal area, quantity that can greatly increased light emitting component can realize more partitions, increases the fine and smooth sense of display frame, improves the effect that local was adjusted luminance, is favorable to realizing liquid crystal display's super high dynamic contrast.
It should be understood that the statements herein are not intended to identify key or critical features of any embodiment of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the 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 without creative efforts.
Fig. 1 is a schematic side view of a backlight module according to an embodiment of the present invention;
fig. 2 is a schematic top view of a first driving plate according to an embodiment of the present invention;
fig. 3 is a schematic top view of a second driving plate according to an embodiment of the present invention;
fig. 4 is a schematic top view of a backlight module according to an embodiment of the present invention;
fig. 5 is a schematic top view of another first driving plate according to an embodiment of the present invention;
fig. 6 is a schematic top view of another second driving plate according to an embodiment of the present invention;
fig. 7 is a schematic view of a partial enlarged structure of a backlight module according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display module according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a main control chip according to an embodiment of the present invention;
fig. 10 is a schematic structural view of another display module according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of another display module according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of another main control chip according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Wherein 101-a first drive plate; 102-a second drive plate; 103-a support layer; 104-a display panel; 105-a touch electrode layer; 106-color film substrate;
11-backlight driving chip; 12-a light emitting element; 13-a first connection; 14-a second connection; 15-a main control chip;
151-content analysis module; 152-a backlight control module; 153-a data conversion module; 154-source driving module; 155-input interface; 156-data processing module; 157-a touch interface; 158-touch chip; 159-signal processing circuitry; 1510-analog front end circuitry; 1511-crystal oscillator; 1512-a timing module;
20-opening.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below 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 efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
Fig. 1 is a side schematic structural view of a backlight module provided by an embodiment of the present invention, fig. 2 is a schematic structural view of overlooking a first drive plate provided by an embodiment of the present invention, fig. 3 is a schematic structural view of overlooking a second drive plate provided by an embodiment of the present invention, fig. 4 is a schematic structural view of overlooking a second drive plate provided by an embodiment of the present invention, referring to fig. 1-4, the backlight module provided by the present embodiment includes:
a first driving board 101, on which the plurality of light emitting elements 12 are disposed, the first driving board 101;
a second driving board 102 connected to the first driving board 101, the second driving board 102 having a plurality of light emitting elements 12; wherein, the second driving board 102 is stacked with the first driving board 101, the second driving board 102 includes a plurality of openings 20 exposing the light emitting elements 12 on the first driving board 101;
and a backlight driving chip 11 on the first driving board 101 to supply driving signals to the light emitting elements 12 on the first driving board 101 and the light emitting elements 12 on the second driving board 102, respectively.
Specifically, the backlight module is used to provide a backlight source for the lcd panel, where the backlight module may be a direct-type backlight module, and the light emitting elements 12 in the backlight module are located on the back of the lcd panel. In this embodiment, the backlight module is composed of a first driving board 101, a second driving board 102 and a backlight driving chip 11, wherein the first driving board 101 and the second driving board 102 are stacked up and down. The light emitting elements 12 are directly disposed on the first driving board 101 and the second driving board 102, and an opening 20 is disposed on the second driving board 102, and the opening 20 can expose the light emitting elements 12 on the first driving board 101. That is, the light emitting elements 12 on the first driving board 101 and the light emitting elements on the second driving board 102 are disposed in a staggered manner, and the second driving board 102 is hollowed out at a position corresponding to the light emitting elements 12 on the first driving board 101, so that the light emitting elements 12 disposed on the first driving board 101 can be seen from the opening 20 of the second driving board 102.
In this embodiment, a lamp panel does not need to be separately provided, the light emitting element 12 is disposed on the first driver board 101 and the second driver board 102, and the light emitting element 12 on the first driver board 101 emits light through the opening 20 of the second driver board 102, so that the thickness of the backlight module can be reduced, and the first driver board 101 can be used as a back board, which is beneficial to reducing the system cost.
In this embodiment, the backlight module further includes a backlight driving chip 11, and the backlight driving chip 11 may be disposed on the first driving board 101 and connected to the first driving board 101. The backlight driving chip 11 supplies driving signals to the light emitting elements 12 on the first driving board 101 and the light emitting elements 12 on the second driving board 102, respectively, to drive the light emitting elements 12 on the first driving board 101 and the light emitting elements 12 on the second driving board 102 to individually dim light. Here, the backlight module performs dimming by using a local dimming method, the light emitting elements 12 on the first driving board 101 and the light emitting elements 12 on the second driving board 102 are respectively divided into a plurality of light emitting areas, the number of the light emitting elements 12 in each light emitting area may be the same or different, and the backlight driving chip 11 respectively sends driving signals to the light emitting elements 12 on the first driving board 101 and the light emitting elements 12 on the second driving board 102 to control different light emitting currents in different light emitting areas, so as to achieve a local dimming effect.
With continued reference to fig. 4, the light emitting elements 12 on the second driving board 102 may be disposed at the center positions of the adjacent four light emitting elements 12 on the first driving board 101, or may be disposed between the adjacent two light emitting elements 12 on the first driving board 101, as long as it is ensured that the light emitting elements 12 on the first driving board 101 and the light emitting elements 12 on the second driving board 102 do not overlap.
In the technical scheme provided by this embodiment, a first driving board and a second driving board which are stacked up and down are arranged in a backlight module, a plurality of light emitting elements are respectively arranged on the first driving board and the second driving board, and a plurality of openings capable of exposing the light emitting elements on the first driving board are arranged on the second driving board, so that the light emitting elements on the first driving board can be turned on through the openings, and the light emitting elements are not interfered with each other; the backlight driving chip respectively provides driving signals for the light-emitting elements on the first driving board and the light-emitting elements on the second driving board, and local dimming is achieved. Compared with the backlight module in the prior art, the embodiment of the utility model provides a backlight module under equal area, quantity that can greatly increased light emitting component can realize more partitions, increases the fine and smooth sense of display screen, improves the effect that local was adjusted luminance, is favorable to realizing liquid crystal display's super high dynamic contrast.
Fig. 5 is a schematic top view structure diagram of another first driving plate provided in an embodiment of the present invention, fig. 6 is a schematic top view structure diagram of another second driving plate provided in an embodiment of the present invention, referring to fig. 5 and fig. 6, based on the above technical solution, optionally, the first driving plate 101 includes a first connecting portion 13, the second driving plate 102 includes a second connecting portion 14, and the first connecting portion 13 is electrically connected to the second connecting portion 14; the light emitting elements on the first driving board 101 are connected to the backlight driving chip 11, and the light emitting elements on the second driving board 102 are connected to the second connecting portion.
Specifically, in the present embodiment, the first driving board 101 may be a Printed Circuit Board (PCB), the backlight driving chip 11 is soldered on the first driving board 101, and the first connection portion 13 is connected with the backlight driving chip 11. The second driving board 102 may be a flexible circuit board (e.g., an FPC flexible board) that is easily stacked on the first driving board 102, and the light emitting elements 12 on the second driving board 102 are connected to the second connection portions 14. The first driving board 101 and the second driving board 102 are stacked up and down and connected to each other through a first connection portion 13 and a second connection portion 14, one path of driving signals output by the backlight driving chip 11 is directly sent to the light emitting elements on the first driving board 101, and the other path of driving signals is sent to the second connection portion through the first connection portion 13 and then transmitted to the light emitting elements 12 on the second driving board 102.
In this embodiment, the number of the first connecting portions 13 and the second connecting portions 14 is not limited, and may be set according to the size of the actual backlight module.
In the present embodiment, the light emitting elements 12 may be Mini-LEDs, micro-LEDs, OLEDs, or LEDs, and the light emitting elements 12 on the first and second driving boards 101 and 102 may be different types of LEDs. Illustratively, the light emitting elements 12 are Mini-LEDs, the Mini-LED chips have a size of 50 μm to 500 μm, typically 0.2 × 0.3mm, and the distance between adjacent light emitting elements 12 is usually 0.4mm, so as to reduce the size of the light emitting elements 12 and the influence of the manufacturing process.
The light emitting elements 12 may be patch LEDs, and are directly printed on the first driving board 101 and the second driving board 102.
In the present embodiment, the influence of the light emitting elements 12 on the first driving board 101 and the second driving board 102 on the display effect is reduced by controlling the height difference between the light emitting elements 12 on the first driving board 101 and the second driving board 102. Fig. 7 is a schematic diagram of a partial enlarged structure of a backlight module according to an embodiment of the present invention, referring to fig. 7, on the basis of the above technical solutions, along a thickness direction of the backlight module, a vertical distance h between an upper surface of the first driving board 101 and an upper surface of the second driving board 102 is less than or equal to a + b, where a is a thickness of the second driving board 102, and b is a thickness of a light emitting element on the first driving board 101. Wherein the height of the light emitting element 12 does not affect the transmission of light. Illustratively, the light emitting element 12 is a Mini-LED with a size of 0.2 × 0.3mm, the height of the Mini-LED is 0.02mm to 0.1mm, and the thickness of the second driving board 102 is usually 0.3mm, so that the vertical distance h between the upper surface of the first driving board 101 and the upper surface of the second driving board 102 is less than or equal to 0.4mm, and the influence of an excessively large height difference between the first driving board 101 and the second driving board 102 on the display effect is prevented.
Further, the light emission intensity of the light emitting element 12 is related to the drive current, and when the light emission time is constant, the light emission intensity increases as the drive current increases, whereas the light emission intensity decreases as the drive current decreases. Since there is a height difference between the first driving board 101 and the second driving board 102, in order to ensure uniformity of light emitting effects of the light emitting elements 12 on the upper and lower layers, the driving current of the light emitting elements 12 on the second driving board 102 is smaller than that of the light emitting elements 12 on the first driving board 101. Illustratively, when the vertical distance h between the upper surface of the first driving board 101 and the upper surface of the second driving board 102 is equal to 0.4mm, the driving current of the light emitting elements 12 on the second driving board 102 is approximately equal to 6.25 times of the driving current of the light emitting elements 12 on the first driving board 101, which can be evaluated according to the optical principle, so that the uniformity of the backlight can be ensured, and the requirement of ultrahigh contrast of the display can be satisfied.
In local dimming, it is common to divide the backlight into different regions and control each region separately so that dark areas of the display image become darker and the display contrast is increased. In the prior art, a main control IC generally processes image data, then controls a liquid crystal panel to display, and then transmits a control signal to a backlight module through a PCB to perform backlight adjustment. And for the backlight in a normally bright and uniform illumination state, the local dimming capability of the backlight is limited, and the illumination brightness cannot be accurately adjusted, so that the method has a defect in the aspect of high-contrast image processing.
In view of the above problem, the embodiment of the utility model provides a still provide a display module assembly, fig. 8 is the utility model provides a pair of display module assembly's structural schematic diagram, refer to fig. 8, display module assembly includes the backlight unit that the above-mentioned arbitrary embodiment provided, this display module assembly still includes display panel 104 and main control chip 15, and wherein display panel 104 is liquid crystal display panel, is located backlight unit's light-emitting side, and backlight unit is used for providing the backlight for display panel 104. The main control chip 15 is used for providing control signals to the backlight module and the display panel 104, respectively.
In this embodiment, the main control chip 15 may be disposed on the supporting layer 103, the supporting layer 103 is located on one side of the display panel 104 close to the backlight module, the main control chip 15 is located at an end of the supporting layer 103, and the main control chip 15 is connected to the display panel 104 and the backlight module through metal wires, and specifically may be connected to the backlight driving chip 11 in the backlight module. The main control chip 15 provides a display control signal to the display panel 104 to control the image display, and also provides a backlight control signal to the backlight driving chip 11 to control the brightness of the light emitting elements 12 in the backlight module through the backlight driving chip 11. That is to say, the main control chip 15 provides the control signal to the backlight module and the display panel 104 after processing the received image data, so as to ensure the synchronization between the backlight control signal and the display control signal, improve the accuracy of adjusting the backlight brightness, and better implement the local dimming of the liquid crystal display, thereby improving the display contrast.
In addition, the main control chip 15 transmits the display control signal to the display panel 104 and also transmits the backlight control signal to the backlight driving chip 11 in the backlight module, so that the processing time of the control signal and the cost of external processing are greatly saved. And because the backlight control signal is processed by the main control chip 15, the backlight driving chip 11 only needs to provide a corresponding driving signal to the light emitting element 12 to control the brightness of the light emitting element 12, and image data does not need to be processed separately, so that the workload of the backlight driving chip 11 is greatly reduced, the total power of backlight control is favorably reduced, and the power consumption of the system can be further reduced.
Fig. 9 is a schematic structural diagram of a main control chip according to an embodiment of the present invention, referring to fig. 9, on the basis of the foregoing technical solution, optionally, the main control chip 15 includes a content analysis module 151, a backlight control module 152, a data conversion module 153, and a source driving module 154; the content analysis module 151 is respectively connected to the backlight control module 152 and the data conversion module 153, and the content analysis module 151 is configured to output a first processing signal to the backlight control module 152 according to the image data acquired by the main control chip 15, and output a second processing signal to the data conversion module 153 according to the image data acquired by the main control chip 15; the backlight control module 152 is connected to the backlight module and configured to provide a backlight control signal to the backlight module according to the first processing signal; the source driving module 154 is connected to the data conversion module 153, and outputs a display control signal to the display panel 104 according to a signal output by the data conversion module 153.
Specifically, the main control chip 15 further includes an input interface 155 and a data processing module 156, where the input interface 155 is configured to receive image data (e.g., video stream data), and the data processing module 156 is configured to parse the received image data into image data (i.e., RGB data) of each frame. The input end of the content analysis module 151 is configured to receive RGB data, the first output end of the content analysis module 151 is connected to the input end of the backlight control module 152, the second output end of the content analysis module 151 is connected to the input end of the data conversion module 153, the output end of the backlight control module 152 is connected to the backlight driver chip 11, the output end of the data conversion module 153 is connected to the input end of the source driver module 154, and the output end of the source driver module 154 is connected to the display panel 104.
The main control chip 15 obtains image data through the input interface 155, and the image data is processed into RGB data by the data processing module 156 and then is emitted to the content analysis module 151, the content analysis module 151 analyzes the received RGB data and outputs a first processing signal to the backlight control module 152, the backlight control module 152 obtains a backlight control signal corresponding to each frame of video image through a local dimming algorithm, and the backlight driving chip 11 controls the brightness of the light emitting element 12 according to the received backlight control signal. Meanwhile, the content analysis module 151 further transmits a second processing signal to the data conversion module 153, the second processing signal is converted by the data conversion module 153 and then outputs a data signal to the source driving module 154, and the source driving module 154 provides a display control signal to the display panel 104, so as to implement image display.
Fig. 10 is a schematic structural diagram of another display module assembly provided by the embodiment of the present invention, which combines fig. 8 and fig. 10, the backlight driving chip 11 can also be integrated inside the main control chip 11, and the main control chip 11 is disposed on the first driving board 101, so that the main control chip 11 has the function of the backlight driving chip 11, and the specific working principle is similar to the working principle of the structure shown in fig. 8, and is not repeated.
Fig. 11 is a schematic structural view of another display module according to an embodiment of the present invention, referring to fig. 11, on the basis of the above technical solutions, the display module further includes a touch electrode layer 105 and a color filter substrate 106, the touch electrode layer 105 is located on one side of the display panel 104 away from the backlight module, and the color filter substrate 106 is located on one side of the touch electrode layer 105 away from the backlight module. Here, the main control chip 15 may be an integrated touch and display driving chip, and may also implement a panel touch function while implementing a display and backlight control function. Fig. 12 is a schematic structural diagram of another main control chip provided by an embodiment of the present invention, referring to fig. 12, a touch function is mainly realized by the touch chip 158, the touch interface 157 is used for receiving touch data and sending the touch data to the touch chip 158, the touch chip 158 outputs the touch data received by the timing signal output by the crystal oscillator 1511 and the timing module 1512 after conversion, and generates a touch signal to be sent to the touch electrode layer 105 after being conditioned by the signal processing circuit 159 and the analog front-end circuit 1510. The touch electrode layer 105 may be a self-capacitance electrode layer or a mutual capacitance electrode layer. The touch electrode layer 105 implements a touch function according to the received touch signal.
In this embodiment, for a specific working principle of the color filter substrate 106, reference may be made to related descriptions in the prior art, and details are not described herein again.
Optionally, the embodiment of the utility model provides a still provide a display device, fig. 13 is the embodiment of the utility model provides a pair of display device's schematic structure diagram, refer to fig. 13, this display device includes the utility model discloses arbitrary embodiment provides a display module assembly. In this embodiment, the display device may be the mobile phone shown in fig. 13, and may also be any electronic product with a display function, including but not limited to the following categories: TV set, notebook computer, desktop display, panel computer, digital camera, intelligent bracelet, intelligent glasses, vehicle-mounted display, medical equipment, industry control equipment, touch interaction terminal etc. the embodiment of the utility model provides a do not do special restriction to this.
It should be understood that various forms of the flows shown above, reordering, adding or deleting steps, may be used. For example, the steps described in the present invention may be executed in parallel, may be executed sequentially, or may be executed in different orders, as long as the desired result of the technical solution of the present invention can be achieved, and the present invention is not limited thereto.
The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A backlight module, comprising:
a first driving board on which a plurality of light emitting elements are disposed;
a second driving board connected to the first driving board, the second driving board having a plurality of light emitting elements disposed thereon; wherein the second driving board is stacked with the first driving board, and the second driving board includes a plurality of openings exposing the light emitting elements on the first driving board;
and the backlight driving chip is positioned on the first driving board and used for respectively providing driving signals for the light-emitting elements on the first driving board and the light-emitting elements on the second driving board.
2. The backlight module according to claim 1, wherein the first driving board comprises a first connection portion, the second driving board comprises a second connection portion, and the first connection portion is electrically connected to the second connection portion;
the light emitting elements on the first driving board are connected with the backlight driving chip, and the light emitting elements on the second driving board are connected with the second connecting part.
3. The backlight module according to claim 1, wherein a vertical distance h between an upper surface of the first driving board and an upper surface of the second driving board in a thickness direction of the backlight module is less than or equal to a + b, where a is a thickness of the second driving board and b is a thickness of the light emitting element on the first driving board.
4. The backlight module according to claim 1, wherein the driving current of the light emitting elements on the second driving board is equal to 6.25 times the driving current of the light emitting elements on the first driving board.
5. The backlight module according to claim 1, wherein the first driving board comprises a printed circuit board and the second driving board comprises a flexible circuit board.
6. A display module comprising the backlight module as claimed in any one of claims 1 to 5, the display module further comprising:
the display panel is positioned on the light emergent side of the backlight module;
and the main control chip is used for respectively providing control signals for the backlight module and the display panel.
7. The display module according to claim 6, wherein the main control chip comprises a content analysis module, a backlight control module, a data conversion module and a source driving module;
the content analysis module is respectively connected with the input end of the backlight control module and the input end of the data conversion module, the output end of the backlight control module is connected with the backlight driving chip, the output end of the data conversion module is connected with the input end of the source electrode driving module, and the output end of the source electrode driving module is connected with the display panel.
8. The display module according to claim 6, further comprising a supporting layer, wherein the supporting layer is located on one side of the display panel close to the backlight module, the main control chip is located at an end of the supporting layer, and the main control chip is respectively connected to the display panel and the backlight driving chip; alternatively, the first and second liquid crystal display panels may be,
the backlight driving chip is integrated inside the main control chip, and the main control chip is arranged on the first driving board.
9. The display module according to claim 6, further comprising a touch electrode layer and a color film substrate, wherein the touch electrode layer is located on one side of the display panel away from the backlight module, and the color film substrate is located on one side of the touch electrode layer away from the backlight module.
10. A display device comprising a display module according to any one of claims 6 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221995612.5U CN217739679U (en) | 2022-07-29 | 2022-07-29 | Backlight module, display module and display device |
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| CN202221995612.5U CN217739679U (en) | 2022-07-29 | 2022-07-29 | Backlight module, display module and display device |
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