Backlight module and wearable device

Abstract

The backlight module comprises a driving plate and a lamp plate, the lamp plate is located on one side of the driving plate, a plurality of light sources are arranged on the side, away from the driving plate, of the lamp plate, a bonding pad is arranged on the side, close to the driving plate, of the lamp plate, and the bonding pad is connected with the light sources; the driving board is used for providing driving signals for the bonding pads. According to the technical scheme, the direct type backlight module is adopted, the light source is arranged on the lamp panel, the driving plate serves as the back plate, the lamp panel is directly connected with the driving plate, backlight can be achieved without arranging a light guide plate and a reflector plate, the thickness of the backlight module is greatly reduced, and therefore the overall thickness of the wearable device can be reduced.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of display technology, and in particular to a backlight module and a wearable device. Background Art

[0002] With the rapid development of display technology, liquid crystal display (LCD) is widely used in display products such as mobile phones, computers, wearables, etc. due to its small size, thin thickness, light weight and low power consumption.

[0003] Wearable display products usually include a backlight module and an LCD display panel. The backlight module is used to provide backlight for the LCD display panel. Existing wearable display products usually use a side-entry backlight module, including a side light source, a reflector, a light guide plate and other optical films. The light emitted by the side light source enters the light guide plate and is reflected by the reflector. Then, it passes through the optical film together with the light emitted by the light guide plate. As LCDs develop towards thinness, existing wearable display products have poor overall thickness due to the large number of components, and can no longer meet consumer demand. Utility Model Content

[0004] The embodiments of the utility model provide a backlight module and a wearable device, so as to reduce the thickness of the backlight module and thus reduce the thickness of the wearable device.

[0005] According to one aspect of the utility model, there is provided a backlight module, comprising:

[0006] A driving plate, wherein the driving plate includes a plurality of driving units;

[0007] A light board, the light board is located on one side of the driving board, a plurality of light sources are arranged on the side of the light board away from the driving board, a soldering pad is arranged on the side of the light board close to the driving board, and the soldering pad is connected to the plurality of light sources; the driving board is used to provide a driving signal to the soldering pad.

[0008] Optionally, there are multiple solder pads, and each solder pad is connected to a corresponding light source.

[0009] Optionally, the driving board includes a plurality of driving units, and the driving units are connected to the pads in a one-to-one correspondence to provide the driving signals to the pads.

[0010] Optionally, the light board includes a plurality of light-emitting areas, and a plurality of light sources are arranged in each of the light-emitting areas;

[0011] The backlight module further comprises a backlight driving chip, which is located on the driving board and connected to the plurality of driving units to provide driving control signals to the driving units respectively corresponding to the plurality of light-emitting areas.

[0012] Optionally, the backlight module further includes a glue layer located between the driving board and the light board to bond and connect the driving board and the light board.

[0013] Optionally, the adhesive layer includes anisotropic conductive adhesive.

[0014] Optionally, the backlight module further comprises a frame glue located at a side of the light board away from the driving board.

[0015] Optionally, the light board includes a flexible circuit board.

[0016] Optionally, the light source includes an LED device.

[0017] According to another aspect of the present invention, a wearable device is provided, comprising a display panel and a backlight module provided by any embodiment of the present invention, wherein the display panel is located at a light emitting side of the backlight module.

[0018] The technical solution provided by the embodiment of the utility model is that the backlight module includes a driving board and a light board stacked up and down, and multiple light sources are arranged on the side of the light board away from the driving board, and a soldering pad is arranged on the side of the light board close to the driving board, so that the soldering pad is connected to the multiple light sources, and the driving board is used to provide a driving signal to the soldering pad to make the light source emit light. Compared with the backlight module in the prior art, the technical solution provided by this embodiment adopts a direct-type backlight module, the light source is arranged on the light board, and the driving board is used as the backboard. The light board is directly connected to the driving board, and the backlight can be realized without the need to set a light guide plate and a reflective sheet, which greatly reduces the thickness of the backlight module, thereby helping to reduce the overall thickness of the wearable device.

[0019] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1A schematic diagram of the structure of a backlight module provided by an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of a top view of a driving plate provided in an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of a top view of a light panel provided in an embodiment of the utility model;

[0024] Figure 4 A schematic structural diagram of another backlight module provided by an embodiment of the utility model.

[0025] Among them, 10-driving board; 11-driving unit; 12-backlight driving chip;

[0026] 20-light board; 21-light source; 22; soldering pad;

[0027] 30-adhesive layer;

[0028] 40-frame glue;

[0029] 100-Display panel. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Figure 1 A schematic diagram of the structure of a backlight module provided by an embodiment of the utility model, referring to Figure 1, the backlight module provided in this embodiment includes:

[0033] Driving plate 10;

[0034] The light board 20 is located at one side of the driving board 10. A plurality of light sources 21 are arranged on the light board 20 away from the driving board 10. A soldering pad 22 is arranged on the light board 20 close to the driving board 10. The soldering pad 22 is connected to the plurality of light sources 21.

[0035] The driving board 10 is used to provide a driving signal to the pad 22 .

[0036] Specifically, the backlight module is a direct-type backlight module, which can be applied to wearable devices, wherein the wearable device includes a backlight module and a liquid crystal display panel, and the backlight module is used to provide a backlight source for the liquid crystal display panel, wherein the light source 21 in the backlight module is located on the back of the liquid crystal display panel. In the present embodiment, the backlight module is composed of a driving board 10 and a light board 20, and the driving board 10 and the light board 20 are stacked. A plurality of light sources 21 are arranged on the side of the light board 20 away from the driving board 10 (i.e., the front of the light board 20), and a soldering pad 22 is arranged on the side of the light board 20 close to the driving board 10 (i.e., the back of the light board 20), and the light source 21 is connected to the soldering pad 22. Among them, the number of the soldering pads 22 can be multiple, and the multiple soldering pads 22 are respectively connected to different light sources 21.

[0037] The driving board 10 is connected to the back side of the light board 20 , and the driving board 10 is used to provide a driving signal to the pad 22 to drive the light source 21 to emit light.

[0038] The technical solution provided by the embodiment of the utility model is that the backlight module includes a driving board 10 and a light board 20 stacked up and down, and multiple light sources 21 are arranged on the side of the light board 20 away from the driving board 10, and a soldering pad 22 is arranged on the side of the light board 20 close to the driving board 10, so that the soldering pad is connected to the multiple light sources 21, and the driving board 10 is used to provide a driving signal to the soldering pad 22 to make the light source 21 emit light. Compared with the backlight module in the prior art, the technical solution provided by this embodiment adopts a direct-type backlight module, the light source 21 is arranged on the light board 20, and the driving board 10 is used as the backboard. The light board 20 is directly connected to the driving board 10, and the backlight can be realized without setting a light guide plate and a reflective sheet, which greatly reduces the thickness of the backlight module, thereby helping to reduce the overall thickness of the wearable device.

[0039] Continue to refer Figure 1 Optionally, in this embodiment, there are multiple pads 22, and each pad 22 is connected to a corresponding light source 21. In other words, each light source 21 is connected by a different pad 22 to achieve individual control of each light source 21, which is conducive to achieving a backlight with higher contrast.

[0040] Figure 2A schematic diagram of a top view of a driving plate provided in an embodiment of the utility model, referring to Figure 2 On the basis of the above technical solutions, optionally, the driving board 10 includes a plurality of driving units 11 , and the driving units 11 are connected to the pads 22 in a one-to-one correspondence to provide driving signals to the pads 22 .

[0041] The backlight module further includes a backlight driving chip 12 . The backlight driving chip 12 is disposed on the driving board 10 and connected to the plurality of driving units 11 to provide driving control signals to the corresponding driving units.

[0042] Specifically, the driving unit 11 includes a transistor, which is used to generate a driving signal (such as a driving current signal) according to the driving control signal output by the backlight driving chip 12, so as to drive the light source 21 to emit light. Among them, multiple driving units 11 can be arranged in an array on the driving board 10.

[0043] Optionally, the backlight driver chip 12 may be disposed on the front side of the driver board 10. In other embodiments, the backlight driver chip 12 may also be bent to the back side of the driver board 10 through a flexible circuit board, which is not limited in this embodiment.

[0044] Figure 3 A schematic diagram of a top view of a light panel provided in an embodiment of the utility model, referring to Figure 2 and Figure 3 The light panel 20 includes a plurality of light-emitting areas (such as Figure 3 Each light emitting area is provided with a plurality of light sources 21. The number of light sources 21 in each light emitting area can be different.

[0045] The same, or different.

[0046] Optionally, the driving units 11 corresponding to the light sources 21 in the same light-emitting area can be connected to the same output end of the backlight driver chip 12, and the driving units 11 corresponding to the light sources 21 in different light-emitting areas are connected to different output ends of the backlight driver chip 12, so that the backlight driver chip 12 can output different driving control signals to different light-emitting areas, which is conducive to realizing regional dimming.

[0047] In this embodiment, the backlight module is dimmed by regional dimming, that is, the multiple driving units 11 on the driving board 10 are designed to be regionally dimmed. By controlling the backlight driver chip 12 to provide different driving control signals to the driving units 11 corresponding to different light-emitting areas of the driver board 10, the driving signals generated by the driving units 11 corresponding to different light-emitting areas are controlled to be different, thereby controlling the driving currents received by the light sources 21 in different light-emitting areas to be different, thereby achieving a local dimming effect. Compared with the technical solution of using a side-entry backlight module in the prior art, the technical solution provided in this embodiment can achieve the local dimming effect of the backlight module, so that the backlight has a higher contrast, which is conducive to increasing the delicateness of the display screen of the wearable device and improving the display effect.

[0048] Optionally, in this embodiment, the light board 20 includes a flexible circuit board, and the light source 21 includes an LED device, such as LED, OLED, Mini-LED or Micro-LED. The LED device is directly mounted on the flexible circuit board. Compared with the solution of mounting the LED device on a glass substrate, the mounting process between the LED device and the flexible circuit board is more mature, which is conducive to ensuring the mounting quality and improving the reliability of the product. For example, the light source 21 is a Mini-LED, and a surface-mount LED is directly mounted on the light board 20.

[0049] Figure 4 A schematic diagram of another backlight module provided by an embodiment of the utility model, referring to Figure 4 On the basis of the above technical solutions, optionally, the backlight module provided in this embodiment further includes a glue layer 30 , and the glue layer 30 is located between the driving board 10 and the light board 20 to bond and connect the driving board 10 and the light board 20 .

[0050] The adhesive layer 30 includes anisotropic conductive film (ACF).

[0051] Specifically, the driving board 10 can be a glass substrate, and the driving unit 11 is made on the glass substrate by mask etching, wherein the driving unit 11 is provided with a soldering point corresponding to the soldering pad 22 on the light board 20, and the soldering point and the soldering pad 22 are connected by an adhesive layer 30 to realize the electrical connection between the driving unit 11 and the light source 21.

[0052] Continue to refer Figure 4 The backlight module further includes a frame glue 40, which is located on the side of the lamp board 20 away from the driving board 10. The frame glue 40 can be specifically arranged around the edge of the lamp board 20 to play a role of packaging and protection.

[0053] The technical solution provided in this embodiment can greatly reduce the components of the backlight module, making the structure of the backlight module simpler, and the module as a whole lighter and thinner, which is more conducive to adapting to small-sized wearable devices and improving consumers' experience.

[0054] Optionally, the present invention also provides a wearable device, such as Figure 4 As shown, the wearable device includes a display panel 100 and a backlight module provided in any embodiment of the present invention. The display panel 100 is a liquid crystal display panel, which is arranged on the light-emitting side of the backlight module. By reducing the thickness of the backlight module, the overall thickness of the wearable device can be reduced. The wearable device can be a watch or other devices. Since the wearable device includes the backlight module provided in any embodiment of the present invention, the wearable device also has the beneficial effects described in any embodiment of the present invention.

[0055] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0056] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A backlight module, characterized in that: include: A driving plate, wherein the driving plate includes a plurality of driving units; A light board, the light board is located at one side of the driving board, a plurality of light sources are arranged on the side of the light board away from the driving board, a soldering pad is arranged on the side of the light board close to the driving board, and the soldering pad is connected to the plurality of light sources; the light board includes a flexible circuit board; The driving board is used to provide a driving signal to the pad.

2. The backlight module according to claim 1, characterized in that: There are multiple solder pads, and each solder pad is connected to a corresponding light source.

3. The backlight module according to claim 2, characterized in that: The driving units are connected to the pads in a one-to-one correspondence to provide the driving signals to the pads.

4. The backlight module according to claim 3, characterized in that: The light board comprises a plurality of light-emitting areas, and a plurality of light sources are arranged in each of the light-emitting areas; The backlight module further comprises a backlight driving chip, which is located on the driving board and connected to the plurality of driving units to provide driving control signals to the driving units respectively corresponding to the plurality of light-emitting areas.

5. The backlight module according to claim 1, characterized in that: It also includes a glue layer, which is located between the driving board and the light board to bond and connect the driving board and the light board.

6. The backlight module according to claim 5, characterized in that: The adhesive layer includes anisotropic conductive adhesive.

7. The backlight module according to claim 1, characterized in that: It also includes a frame glue located at a side of the lamp board away from the driving board.

8. The backlight module according to claim 1, characterized in that: The light source includes an LED device.

9. A wearable device, characterized in that: It comprises a display panel and the backlight module according to any one of claims 1 to 8, wherein the display panel is located at the light emitting side of the backlight module.

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