Light source module, key and electronic equipment

Abstract

The invention discloses a light source module, a key and electronic equipment. The light source module comprises a light guide plate. The lamp assembly comprises an LED lamp and a circuit board, the LED lamp is electrically connected to one side, in the first direction, of the circuit board, and the two opposite sides, in the second direction, of the circuit board are bonded to one ends of the light guide plates correspondingly; the circuit board is provided with a through hole, and the through hole is located in the side, facing the middle of the circuit board, of the LED lamp in the first direction. The LED lamp is electrically connected to the side, in the first direction, of the circuit board, the two opposite sides, in the second direction, of the circuit board are bonded to one end of the light guide plate respectively, and external water drops or impurities can be effectively prevented from entering the interior between the circuit board and the light guide plate through the arrangement of the through holes.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and more specifically, to a light source module, a key and an electronic equipment. Background Art

[0002] In the related art, the light source inside the key is generally irradiated onto the light guide plate by an LED lamp, and then the light guide plate illuminates the character area on the key surface. At present, LED lamps are generally installed on FPC (Flexible Printed Circuit Board), and the FPC is pasted to one side of the light guide plate. The gap between the FPC and the light guide plate is easy to enter water droplets or impurities, which will cause problems such as uneven light emission of the light guide plate.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the invention

[0004] An object of the present invention is to provide a new technical solution for a light source module.

[0005] According to a first aspect of the present invention, a light source module is provided. The light source module comprises:

[0006] Light guide plate;

[0007] A lamp assembly, comprising an LED lamp and a circuit board, wherein the LED lamp is electrically connected to one side of the circuit board along a first direction, and two opposite sides of the circuit board along a second direction are respectively bonded to one end of the light guide plate;

[0008] Wherein, the circuit board is provided with a through hole, and along the first direction, the through hole is located on a side of the LED lamp facing the middle of the circuit board.

[0009] Optionally, a plurality of the LED lamps are provided, and the plurality of the LED lamps are respectively arranged on both sides of the circuit board along the first direction, and the through holes are correspondingly provided on both sides of the circuit board.

[0010] Optionally, the through hole is a strip-shaped hole arranged along the second direction.

[0011] Optionally, the light guide plate is provided with an escape opening, and the LED lamp can be embedded in the escape opening.

[0012] Optionally, the circuit board is bonded to the light guide plate by double-sided adhesive.

[0013] According to a second aspect of the present invention, a key is provided, which includes the light source module of the above embodiment.

[0014] Optionally, the button further includes a touch panel and a mounting shell, the light source module is disposed in the mounting shell, and the touch panel cover is disposed on the light source module.

[0015] Optionally, the button further includes a piezoelectric sensing element, and the piezoelectric sensing element is configured to vibrate according to a touch signal of the touch panel, thereby driving the touch panel to vibrate.

[0016] Optionally, the light source module is snap-connected to the mounting shell.

[0017] According to a third aspect of the present invention, an electronic device is provided, which includes the key of the above embodiment.

[0018] A technical effect of the present application is that the LED lamp is electrically connected to one side of the circuit board along the first direction, and the opposite sides of the circuit board along the second direction are respectively bonded to one end of the light guide plate, and the provision of the through holes can effectively prevent external water droplets or impurities from entering the interior between the circuit board and the light guide plate.

[0019] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0021] Figure 1 It is a structural schematic diagram of a light source module according to an embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the structural decomposition of a light source module according to an embodiment of the present application.

[0023] Figure 3 It is a schematic diagram of the structural decomposition of a key of an embodiment of the present application.

[0024] Reference numerals:

[0025] 1. Light guide plate; 11. Avoidance; 2. Lamp assembly; 21. LED lamp; 22. Circuit board; 221. Through hole; 222. Mounting part; 223. Main body; 3. Double-sided tape; 4. Touch panel; 41. Character area; 5. Mounting shell; 6. Piezoelectric sensing element. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0029] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0030] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0031] According to an embodiment of the present application, a light source module is provided, such as Figures 1 to 3 As shown, the light source module includes a light guide plate 1 and a lamp assembly 2. The lamp assembly 2 includes an LED lamp 21 and a circuit board 22. The LED lamp 21 is electrically connected to one side of the circuit board 22 along a first direction, and the two opposite sides of the circuit board 22 along a second direction are respectively bonded to one end of the light guide plate 1. The circuit board 22 is provided with a through hole 221, and along the first direction, the through hole 221 is located on the side of the LED lamp 21 facing the middle of the circuit board 22.

[0032] In this example, the LED lamp 21 is electrically connected to one side of the circuit board 22 along the first direction, and the opposite sides of the circuit board 22 along the second direction are respectively bonded to one end of the light guide plate 1. The setting of the through hole 221 can effectively prevent external water droplets or impurities from entering the interior between the circuit board 22 and the light guide plate 1.

[0033] It should be noted that if Figure 1 and Figure 2 As shown, the through hole 221 on the circuit board 22 can separate the circuit board 22 into a mounting portion 222 and a main body 223. The LED lamp 21 is mounted on the mounting portion 222. After the circuit board 22 is bonded to the light guide plate 1, the main body 223 can be opposite to the end face of the light guide plate 1, and the mounting portion 222 is located on the outside. When water drops fall on the mounting portion 222, if the through hole 221 is not provided on the circuit board 22, due to the tension of the water, the water droplets can easily enter the interior of the main body 223 that can be opposite to the end face of the light guide plate 1. The through hole 221 is provided to prevent water drops from entering the interior of the main body 223 that can be opposite to the end face of the light guide plate 1, so as to ensure the uniformity of the light emission of the light guide plate 1.

[0034] In this example, the circuit board 22 may be a flexible circuit board 22, which is light and space-saving. Alternatively, the circuit board 22 may be a hard circuit board 22, which may be determined by those skilled in the art according to actual conditions and is not specifically limited here.

[0035] like Figure 2 As shown, in this example, the circuit board 22 can be a rectangular plate, the first direction can be the length direction of the circuit board 22, and the second direction can be the width direction of the circuit board 22. The end face of the circuit board 22 is bonded to the end face of the light guide plate 1. For example, the circuit board 22 is bonded to the light guide plate 1 by double-sided tape 3. That is, double-sided tape 3 is respectively provided on both sides of the circuit board 22 along the second direction, and the circuit board 22 can be bonded to the light guide plate 1 by double-sided tape 3. The double-sided tape 3 can also have a sealing effect to prevent water vapor or impurities from entering the interior of the light source module from the side. Among them, the width of the double-sided tape 3 can be determined by those skilled in the art according to actual conditions, as long as it can ensure that the circuit board 22 and the light guide plate 1 can be stably bonded, and the double-sided tape 3 can be prevented from affecting the uniform light emission of the light guide plate 1.

[0036] Of course, the circuit board 22 and the light guide plate 1 may also be connected by means of sealant or the like, and those skilled in the art may determine this according to actual conditions, and no specific limitation is made here.

[0037] In this example, the LED lamp 21 is suitable for providing a light source, and the LED is electrically connected to the circuit board 22, which can control the LED lamp 21 to turn on or off and provide electrical energy for the LED lamp 21. The light guide plate 1 can be made of transparent PC (i.e., polycarbonate) or PMMA (i.e., polymethyl methacrylate) material, etc. The LED lamp 21 irradiates the light guide plate 1, and the light is totally reflected, so that the light guide plate 1 can emit light evenly, and a small number of LED lamps 21 can also light up multiple character areas 41. Of course, the specific material of the light guide plate 1 can be determined by those skilled in the art according to actual conditions, and no specific limitation is made here.

[0038] In an example, Figure 1 and Figure 2 As shown, there are a plurality of LED lamps 21 , and the plurality of LED lamps 21 are respectively arranged on both sides of the circuit board 22 along the first direction, and the through holes 221 are respectively correspondingly provided on both sides of the circuit board 22 .

[0039] like Figure 1 and Figure 2As shown, in this example, LED lamps 21 are arranged on both sides of the circuit board 22 along the first direction, and the LED lamps 21 on both sides can respectively correspond to the two ends of the light guide plate 1 along the first direction. The LED lamps 21 are arranged at the positions of the opposite ends of the light guide plate 1, so as to make the light guide plate 1 emit light uniformly.

[0040] In this example, a plurality of LED lamps 21 are respectively arranged on both sides of the circuit board 22 along the first direction. For example, two, three or four LED lamps 21 are respectively installed on both sides of the circuit board 22. Those skilled in the art may determine the method according to the actual situation, and no specific limitation is made here. Among them, the number of LED lamps 21 on both sides of the circuit board 22 along the first direction is equal, so as to make the light guide plate 1 emit light uniformly.

[0041] In an example, Figure 2 As shown, the through hole 221 is a strip-shaped hole arranged along the second direction.

[0042] like Figure 2 As shown, in this example, the through hole 221 is a strip hole, and the strip hole extends along the second direction to both sides of the circuit board 22, so as to further prevent water droplets from entering the interior of the main body 223 that is opposite to the end surface of the light guide plate 1. For example, double-sided tape 3 is attached to both sides of the circuit board 22 along the second direction, and both ends of the through hole 221 extend to the positions of the double-sided tape 3 on both sides respectively.

[0043] The size of the through hole 221 along the first direction may be determined by those skilled in the art according to actual conditions and is not specifically limited here.

[0044] In an example, Figure 1 and Figure 2 As shown, the light guide plate 1 is provided with a avoidance opening 11 , and the LED lamp 21 can be embedded in the avoidance opening 11 .

[0045] In this example, a groove-shaped avoidance opening 11 is provided at the end of the light guide plate 1 along the first direction. The LED lamp 21 is located on one side of the circuit board 22 along the first direction, so that the LED lamp 21 can be embedded in the avoidance opening 11, thereby protecting the LED lamp 21. In addition, the avoidance opening 11 is provided at the end of the light guide plate 1 along the first direction, so that the LED lamp 21 can be inserted into the avoidance opening 11, thereby facilitating the connection of the lamp assembly 2 to the light guide plate 1, and is conducive to reducing the length of the light guide plate 1, thereby facilitating the miniaturization design of the light source assembly.

[0046] like Figure 2 As shown, in this example, LED lamps 21 are arranged on both sides of the circuit board 22 along the first direction, and groove-shaped avoidance openings 11 are correspondingly arranged on both ends of the light guide plate 1 along the first direction.

[0047] Of course, the avoidance opening 11 may also be in other shapes or be arranged at other positions. Those skilled in the art may determine this according to actual conditions, and no specific limitation is made here.

[0048] According to another embodiment of the present invention, a key is provided. Figures 1 to 3 As shown, the key comprises the light source module of the above embodiment. The light source module can make the key illuminated for the convenience of user use.

[0049] In this example, the light source module includes a light guide plate 1 and a lamp assembly 2. The lamp assembly 2 includes an LED lamp 21 and a circuit board 22, wherein the LED lamp 21 is electrically connected to one side of the circuit board 22 along the first direction, and the circuit board 22 is respectively bonded to one end of the light guide plate 1 on two opposite sides along the second direction. The circuit board 22 is provided with a through hole 221, and along the first direction, the through hole 221 is located on one side of the LED lamp 21 facing the middle of the circuit board 22. The LED lamp 21 is electrically connected to one side of the circuit board 22 along the first direction, and the circuit board 22 is respectively bonded to one end of the light guide plate 1 on two opposite sides along the second direction. The provision of the through hole 221 can effectively prevent external water droplets or impurities from entering the interior between the circuit board 22 and the light guide plate 1.

[0050] In an example, Figure 3 As shown, the button further includes a touch panel 4 and a mounting shell 5, the light source module is arranged in the mounting shell 5, and the touch panel 4 covers the light source module.

[0051] like Figure 3 As shown, in this example, the mounting shell 5 has a mounting groove, the light source module is fixedly arranged in the mounting groove, the touchpad 4 is covered on the light source module and can be sealed and connected to the open end of the mounting groove. For example, the touchpad 4 can be bonded to the open end of the mounting groove by a sealant. A character area 41 is provided on the touchpad 4, and the light source module can illuminate the character area 41 for the convenience of user use. The touchpad 4 can be electrically connected to the MCU (Microcontroller Unit), and the user can implement key command operation by touching or pressing the character area 41 on the touchpad 4. Among them, the touchpad 4 can be configured to generate a signal by the user sliding along the touchpad 4, or it can also be configured to generate a signal by two-finger touch or three-finger touch. Those skilled in the art can set it according to actual conditions, and no specific limitation is made here.

[0052] The button may be a switch button of an electronic device such as an electrical appliance, a car or an engineering machine, for example, an interior button or a steering wheel button of a car.

[0053] In one example, the light source module is snap-connected to the mounting shell 5. The lamp assembly 2 is bonded and fixed to the light guide plate 1, the side wall of the light guide plate 1 is provided with latch teeth, and the inner wall of the mounting shell 5 is provided with a slot that matches the latch teeth. The light guide plate 1 can be fixed in the mounting shell 5 by latching with the latch teeth, and the mounting structure is simple and easy to operate. Among them, the light guide plate 1 can be provided with a plurality of latch teeth at intervals along the circumferential direction, which is beneficial to improve the stability of the latching. Alternatively, the lamp assembly 2 can also be fixed inside the mounting shell 5 by adhesive bonding. Those skilled in the art can decide according to the actual situation, and no specific limitation is made here.

[0054] In an example, Figure 3 As shown, the button further includes a piezoelectric sensing element 6 , and the piezoelectric sensing element 6 is configured to vibrate according to a touch signal of the touch panel 4 , thereby driving the touch panel 4 to vibrate.

[0055] like Figure 3 As shown, in this example, the piezoelectric sensing element 6 can vibrate according to the touch signal of the touch pad 4, and can drive the touch pad 4 to vibrate, so as to remind the user that the touch pad 4 has correctly touched the key, and can perform a press touch operation. That is, the touch pad 4 and the piezoelectric sensing element 6 can both be electrically connected to the MCU (Microcontroller Unit), and when the touch pad 4 is touched or pressed by the user, it can generate a touch signal and transmit the touch signal to the MCU. After receiving the touch signal, the MCU applies a voltage to the piezoelectric sensing element 6, so that the piezoelectric sensing element 6 generates an inverse piezoelectric effect, thereby generating vibration and being able to drive the touch pad 4 to vibrate, so as to provide feedback to the user.

[0056] For example, the piezoelectric sensing element 6 is disposed outside the mounting shell 5 and is disposed opposite to the touch panel 4. The piezoelectric sensing element 6 can contact the mounting shell 5. When the piezoelectric sensing element 6 vibrates, it can drive the mounting shell 5 to vibrate, thereby driving the touch panel 4 to vibrate. And when the user touches or presses the touch panel 4, pressure can be applied to the piezoelectric sensing element 6, so that the piezoelectric sensing element 6 generates a positive piezoelectric effect, so that an electrical signal can be transmitted to the MCU, so that the signal can be transmitted to the MCU in coordination with the touch panel 4 to improve the stability and reliability of the MCU receiving the signal.

[0057] In this example, the piezoelectric sensing element 6 may be piezoelectric ceramics or other types of piezoelectric crystals. Those skilled in the art may determine the method based on actual conditions, and no specific limitation is made herein.

[0058] like Figure 3As shown, in this example, a plurality of piezoelectric sensing elements 6 can be provided, and the plurality of piezoelectric sensing elements 6 are arranged at intervals, so as to improve the vibration effect and enable the touch panel 4 to vibrate uniformly as a whole, providing clearer tactile feedback. For example, two, three, four or five piezoelectric sensing elements 6 can be provided, and those skilled in the art can determine according to actual conditions, and no specific limitation is made here.

[0059] According to another embodiment of the present invention, an electronic device is provided. The electronic device includes the key of the above embodiment. Figures 1 to 3 As shown, the button includes the light source module of the above embodiment. The light source module can make the button illuminated for user use. The light source module includes a light guide plate 1 and a lamp assembly 2. The lamp assembly 2 includes an LED lamp 21 and a circuit board 22, wherein the LED lamp 21 is electrically connected to one side of the circuit board 22 along the first direction, and the circuit board 22 is respectively bonded to one end of the light guide plate 1 on two opposite sides along the second direction. The circuit board 22 is provided with a through hole 221, and along the first direction, the through hole 221 is located on one side of the LED lamp 21 facing the middle of the circuit board 22. The LED lamp 21 is electrically connected to one side of the circuit board 22 along the first direction, and the circuit board 22 is respectively bonded to one end of the light guide plate 1 on two opposite sides along the second direction. The provision of the through hole 221 can effectively prevent external water droplets or impurities from entering the interior between the circuit board 22 and the light guide plate 1.

[0060] In this example, the electronic device may be an electrical appliance, a car or an engineering machine, etc. The button of the present application may be used as an electronic device switch button, etc. Of course, the specific type of the electronic device may be determined by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0061] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0062] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A light source module, characterized in that: include: Light guide plate; A lamp assembly, comprising an LED lamp and a circuit board, wherein the LED lamp is electrically connected to one side of the circuit board along a first direction, and two opposite sides of the circuit board along a second direction are respectively bonded to one end of the light guide plate; Wherein, the circuit board is provided with a through hole, and along the first direction, the through hole is located on a side of the LED lamp facing the middle of the circuit board.

2. The light source module according to claim 1, characterized in that: There are a plurality of LED lamps, and the plurality of LED lamps are respectively arranged on both sides of the circuit board along the first direction, and the through holes are correspondingly arranged on both sides of the circuit board.

3. The light source module according to claim 1, characterized in that: The through hole is a strip-shaped hole arranged along the second direction.

4. The light source module according to claim 1, characterized in that: The light guide plate is provided with an escape opening, and the LED lamp can be embedded in the escape opening.

5. The light source module according to claim 1, characterized in that: The circuit board is bonded to the light guide plate by double-sided adhesive.

6. A key, characterized in that: Comprising the light source module as described in any one of claims 1 to 5.

7. The key according to claim 6, characterized in that: The button also includes a touch panel and a mounting shell, the light source module is arranged in the mounting shell, and the touch panel cover is arranged on the light source module.

8. The key according to claim 7, characterized in that: The button also includes a piezoelectric sensing element, and the piezoelectric sensing element is configured to vibrate according to a touch signal of the touch panel, thereby driving the touch panel to vibrate.

9. The key according to claim 7, characterized in that: The light source module is snap-connected to the mounting shell.

10. An electronic device, characterized in that: Comprising a key as described in any one of claims 6 to 9.

Images