Keyboard, electronic device, and electronic system

Abstract

The embodiment of the application provides a keyboard, an electronic device and an electronic system, and belongs to the technical field of keyboards. The keyboard comprises a key assembly, a circuit board, a first contact, an organic light-emitting diode layer and a light-transmitting layer with elasticity. In the thickness direction of the circuit board, the key assembly and the circuit board are respectively located on the two sides of the light-transmitting layer, the light-transmitting layer and the organic light-emitting diode layer are respectively located on the two sides of the circuit board, the light-transmitting layer is fixedly connected with the circuit board and is in contact with the key assembly, and the organic light-emitting diode layer is electrically connected with the circuit board and is arranged on the surface of the circuit board. The circuit board has a light-transmitting area and a containing groove, the light-transmitting area is used for light to pass through, the circuit board comprises a key circuit, the key circuit comprises a second contact, and the second contact is located inside the containing groove. The first contact is fixedly connected with the light-transmitting layer, and the first contact is used for electrically contacting with the second contact, so that the key circuit is turned on. In this way, the large key stroke design can be realized while reducing the thickness of the keyboard, and the keyboard input experience can be improved.

Description

Technical Field

[0001] This application relates to the field of keyboard technology, and in particular to a keyboard, electronic device and electronic system. Background Technology

[0002] Laptops, 2-in-1 tablets, and other electronic devices are typically equipped with keyboards for information input. Taking laptops as an example, membrane keyboards contribute to the laptop's slim and lightweight design. In related technologies, reducing the key travel can further reduce the thickness of membrane keyboards. However, key travel is positively correlated with tactile feedback; reducing the key travel will lead to a decline in the keyboard input experience. Utility Model Content

[0003] This application provides a keyboard, electronic device, and electronic system that can achieve a large key travel design while reducing the keyboard thickness, thereby improving the keyboard input experience.

[0004] In a first aspect, embodiments of this application provide a keyboard, which includes a key assembly, a circuit board, a first contact, an organic light-emitting diode (OLED) layer, and a resilient light-transmitting layer. Along the thickness direction of the circuit board, the key assembly and the circuit board are located on opposite sides of the light-transmitting layer. The light-transmitting layer and the OLED layer are also located on opposite sides of the circuit board. The light-transmitting layer is fixedly connected to the circuit board and contacts the key assembly. The OLED layer is electrically connected to the circuit board and is disposed on the surface of the circuit board. The circuit board has a light-transmitting area that transmits light emitted from the OLED layer to the light-transmitting layer, and the light-transmitting layer transmits light from the light-transmitting area to the area where the key assembly is located. A receiving groove is provided on the side of the circuit board facing the resilient layer. The circuit board includes a key circuit, and the key circuit includes a second contact located inside the receiving groove. The first contact is fixedly connected to the side of the light-transmitting layer facing the circuit board. On a projection plane perpendicular to the thickness direction of the circuit board, the orthographic projection of the first contact and the orthographic projection of the second contact at least partially overlap. The orthographic projection of the first contact is located inside the orthographic projection of the receiving groove. The first contact is used to make electrical contact with the second contact to enable the key circuit to conduct.

[0005] In this embodiment, an organic light-emitting diode (OLED) layer is used as the light source for illuminating the key characters. The thickness of the OLED layer can be on the order of hundreds of nanometers. The small thickness of the OLED layer has minimal impact on the keyboard thickness, thus contributing to a reduction in keyboard thickness. Furthermore, by using an OLED layer instead of the existing LED strip layer, the light guide layer is eliminated, further reducing the keyboard thickness.

[0006] Furthermore, by integrating the key circuitry that enables key functionality onto the circuit board, and allowing for a thinner circuit board design, the impact on keyboard thickness can be minimized, further contributing to a reduction in keyboard thickness. Additionally, forming the key circuitry on the circuit board is less complex, improving manufacturing efficiency. Moreover, by providing accommodating recesses, a structure similar to the second insulating layer in existing technologies can be avoided between the light-transmitting layer and the circuit board. In other words, this embodiment eliminates the second insulating layer of existing technologies, further reducing keyboard thickness. Therefore, integrating the key circuitry onto the circuit board, and providing accommodating recesses on the circuit board, allows for a larger key travel design while further reducing keyboard thickness, ensuring a superior keyboard input experience.

[0007] In some possible implementations, along the thickness direction of the circuit board, the organic light-emitting diode (OLED) layer includes a first electrode layer, an organic light-emitting layer, and a second electrode layer stacked together, with the first electrode layer attached to the surface of the circuit board. Therefore, the circuit board can serve as the substrate for the OLED layer, and the OLED layer can be directly formed on the surface of the circuit board using OLED manufacturing processes. This further reduces the stacking height of the circuit board and the OLED layer, further minimizing the impact on keyboard thickness and contributing to a further reduction in keyboard thickness.

[0008] In some possible implementations, the first electrode layer is an anode layer, and the second electrode layer is a cathode layer. With this configuration, the anode layer can receive a drive signal output from the drive circuit of the circuit board, and the cathode can receive a reference voltage signal (or cathode power signal). The organic light-emitting layer emits light under the combined action of the drive signal and the reference voltage signal.

[0009] In some possible implementations, the organic light-emitting diode (OLED) layer includes multiple light-emitting units, each of which includes a first electrode layer, an organic light-emitting layer, and a second electrode layer stacked together. With this configuration, the OLED layer is essentially an array of light sources arranged in an array.

[0010] In some possible implementations, the surface of the circuit board in contact with the first electrode layer is made of glass or transparent polyimide. This arrangement allows the first electrode layer to be directly fabricated on the surface of the circuit board, thereby reducing the stack thickness of the circuit board and the organic light-emitting diode (OLED) layer. Furthermore, it is compatible with existing processes, reducing the difficulty and cost of forming the OLED layer on the circuit board.

[0011] In some possible implementations, the first electrode layer is made of a light-transmitting conductive material, such as an indium oxide (ITO). This configuration allows light to pass through the first electrode layer, helping to reduce the difficulty of light passing through the circuit board.

[0012] In some possible implementations, the circuit board is a flexible circuit board. With this configuration, the circuit board can serve as a substrate carrying the organic light-emitting diode (OLED) layer, and the OLED layer can be formed directly on the surface of the circuit board.

[0013] In some possible implementations, at least a portion of the orthographic projection of the recess accommodating the projection plane coincides with the orthographic projection of the light-transmitting area. This arrangement reduces the difficulty for light emitted from the organic light-emitting diode layer to pass through the circuit board.

[0014] In some possible implementations, the key circuit includes a first trace and two second contacts, spaced apart. Both ends of the first trace are electrically connected to the two second contacts. This configuration ensures that the first trace remains largely undeformed during movement of the first contact relative to the second contact, preventing breakage at corners and improving the reliability of the key circuit, thereby enhancing the overall reliability of the keyboard. Furthermore, placing the first trace inside the circuit board helps to further reduce the keyboard's thickness.

[0015] In some possible implementations, the key circuit further includes a second trace, one end of which is electrically connected to a second contact. The keyboard also includes an electrical connection wire, one end of which is electrically connected to a first contact, and the other end of which is electrically connected to the other end of the second trace. With this configuration, the key circuit can be turned on when the first and second contacts are electrically in contact.

[0016] In some possible implementations, the keyboard also includes a support substrate located along the thickness direction of the circuit board on the side of the organic light-emitting diode (OLED) layer away from the circuit board, and the support substrate is fixedly connected to the OLED layer. This configuration can support the circuit board, OLED layer, and other structures.

[0017] In some possible implementations, the keyboard also includes a light-blocking layer. Along the thickness direction of the circuit board, the light-blocking layer is fixedly connected to the side of the light-transmitting layer away from the circuit board. The light-blocking layer has a first opening for transmitting light emitted from the light-transmitting layer to the side of the light-blocking layer away from the light-transmitting layer. The key assembly contacts the light-transmitting layer through the first opening. This arrangement allows light emitted from the light-transmitting layer to illuminate a predetermined range, for example, light emitted from the light-transmitting layer illuminating the keycaps, preventing light from illuminating the gap between two adjacent keycaps.

[0018] In some possible implementations, the orthographic projection of the first opening on the projection plane at least partially overlaps with the orthographic projection of the light-transmitting area. This arrangement reduces the difficulty for light emitted from the organic light-emitting diode layer to pass through the light-blocking layer.

[0019] In some possible implementations, the keyboard also includes a support substrate, which is fixedly connected to the light-transmitting layer. Along the thickness direction of the circuit board, the support substrate is located on the side of the light-transmitting layer away from the circuit board. The support substrate has a second opening for transmitting light emitted from the light-transmitting layer to the side of the support substrate away from the light-transmitting layer. The key assembly contacts the light-transmitting layer through the second opening. With this configuration, the keyboard eliminates the light-blocking layer. Besides supporting the organic light-emitting diode layer, circuit board, and other structures, the support substrate also performs the same light-blocking function as the light-blocking layer, ensuring that the light emitted from the organic light-emitting diode layer illuminates a predetermined range and preventing light leakage from the peripheral areas of the keycaps. Furthermore, it reduces the number of layers in the keyboard, further reducing its thickness.

[0020] In some possible implementations, the orthographic projection of the second opening on the projection plane at least partially overlaps with the orthographic projection of the light-transmitting area. This arrangement reduces the difficulty for light emitted from the organic light-emitting diode layer to pass through the supporting substrate.

[0021] In some possible implementations, the key assembly includes a keycap, a scissor-switch mechanism, and a light-transmitting elastic element. Along the thickness direction of the circuit board, both the elastic element and the scissor-switch mechanism are located between the keycap and the light-transmitting layer. The two ends of the elastic element contact the keycap and the light-transmitting layer respectively, and the scissor-switch mechanism is connected to the keycap. This arrangement allows light emitted from the organic light-emitting diode layer to illuminate the keycap and improves the stability of the keycap's movement, thereby enhancing the tactile feedback during keypress.

[0022] Secondly, embodiments of this application provide an electronic device that includes a keyboard as described in any of the first aspects.

[0023] Thirdly, embodiments of this application provide an electronic system, which includes an electronic device and a keyboard as described in any of the first aspects, the keyboard being communicatively connected to the electronic device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram illustrating an application scenario of the keyboard provided in an embodiment of this application;

[0025] Figure 2 A schematic diagram illustrating another application scenario of the keyboard provided in this application embodiment;

[0026] Figure 3 This is a cross-sectional schematic diagram of a keyboard in related technologies;

[0027] Figure 4 This is a cross-sectional schematic diagram showing the interaction between a backlight module, membrane keypad, and metal plate in related technologies.

[0028] Figure 5 A cross-sectional schematic diagram of a keyboard provided in an embodiment of this application;

[0029] Figure 6 Another cross-sectional schematic diagram of the organic light-emitting diode layer provided in the embodiments of this application;

[0030] Figure 7 for Figure 5 A schematic diagram at point A in the middle;

[0031] Figure 8 A cross-sectional schematic diagram of another keyboard structure provided in an embodiment of this application;

[0032] Figure 9 This is a cross-sectional schematic diagram of another keyboard structure provided in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. Electronic devices;

[0035] 110. Display screen; 120. First housing; 130. Second housing; 140. Monitor; 150. Main unit;

[0036] 200. Keyboard;

[0037] 210. Key assembly; 211. Keycap; 212. Spring element; 213. Scissor mechanism;

[0038] 220. Circuit board; 221. Light-transmitting area; 222. Receiving groove; 223. Button circuit; 224. Second contact; 225. First trace; 226. Second trace; 227. Third contact;

[0039] 230. Organic light-emitting diode layer; 231. First electrode layer; 232. Organic light-emitting layer; 233. Second electrode layer; 234. Encapsulation layer; 235. First spacer layer; 236. Second spacer layer; 237. Light-emitting unit;

[0040] 240. Supporting substrate; 241. Second opening;

[0041] 250, Light-blocking layer; 251, First opening;

[0042] 260. Translucent layer;

[0043] 270. First contact point;

[0044] 280. First adhesive layer;

[0045] 290. Electrical connection wire. Detailed Implementation

[0046] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0047] This application provides a keyboard 200, which can be integrated into an electronic device 100 or form an electronic system with the electronic device 100 capable of communicating with the keyboard 200. Here, "communication connection" can refer to electrical signal transmission, including wireless communication connections and wired communication connections. Wireless communication connections do not require a physical medium and are not considered connections that limit the product's structure.

[0048] When the keyboard 200 is integrated into the electronic device 100, the keyboard 200 can be understood as a component constituting the electronic device 100. The keyboard 200 may be integrated into, but is not limited to, electronic devices 100 with or without a display screen 110, such as foldable phones, laptops, wearable electronic products, tablets, game controllers, calculators, or PDAs (personal digital assistants).

[0049] Figure 1 This is a schematic diagram of an application scenario for the keyboard 200 provided in an embodiment of this application.

[0050] For example, see Figure 1 Taking a laptop computer as an example, the laptop computer includes a display screen 110, a keyboard 200, a first housing 120, and a second housing 130. The first housing 120 and the second housing 130 are rotatably connected. The keyboard 200 is installed in the first housing 120, and the display screen 110 is installed in the second housing 130. English letters, Chinese characters, numbers, punctuation marks, control commands, etc., can be input into the electronic device 100 through the keyboard 200, and the display screen 110 can display the input operations from the keyboard 200.

[0051] When the keyboard 200 is integrated into the electronic system, the keyboard 200 and the electronic device 100 can be understood as two parallel components. The keyboard 200 and the electronic device 100 can communicate with each other via wireless communication methods such as Bluetooth, or via wired connections such as wires or data cables.

[0052] The electronic device 100 in the electronic system may include, but is not limited to, a desktop computer, a tablet computer, or a display device. It should be noted that the electronic device 100 in the electronic system may or may not have a display screen 110.

[0053] Figure 2 This is a schematic diagram illustrating another application scenario of the keyboard 200 provided in this application embodiment.

[0054] For example, see Figure 2Taking the electronic device 100 in the electronic system as a desktop computer as an example, the desktop computer may include a host 150 and a monitor 140. The host 150 and the monitor 140 can be connected by a wired connection. The keyboard 200 can communicate with the host 150. For example, the keyboard 200 communicates with the host 150 by a wired connection.

[0055] Figure 3 This is a cross-sectional schematic diagram of a keyboard in related technologies.

[0056] In related technologies, keyboard 400 is a membrane keyboard, see [link / reference]. Figure 3 The membrane keyboard includes keycaps 410, a scissor-switch mechanism 420, a rubber dome 430, a metal plate 440, a membrane switch (MEM) 450, and a backlight module (BLM) 460. Both the scissor-switch mechanism 420 and the rubber dome 430 are located between the keycaps 410 and the membrane switch 450. The two ends of the scissor-switch mechanism 420 are connected to the keycaps 410 and the metal plate 440, respectively, and are used to balance and fix the keycaps 410. The two ends of the rubber dome 430 are in contact with the keycaps 410 and the membrane switch 450, respectively. The rubber dome 430 is a compressible elastomer; during the pressing of the keycaps 410, it generates a force-displacement curve and creates the key feel. When the rubber dome 430 is pressed to a certain position, it activates the membrane switch of the membrane switch 450, thus activating the key function. Both the metal plate 440 and the backlight module 460 are located on the side of the membrane key 450 away from the rubber dome 430. The metal plate 440 is positioned between the backlight module 460 and the membrane key 450, and is fixedly connected to both the backlight module 460 and the membrane key 450. The metal plate 440 has a light-passing hole 441 that allows light to pass through it. The backlight module 460 provides a bottom light source, enabling the key characters on the keycaps 410 to illuminate, thus enhancing the user experience.

[0057] Among them, the key travel of keyboard 400 is as follows: Figure 3 As shown in the middle T, the key travel is the minimum distance between the keycap 410 and the membrane key 450. The key travel is positively correlated with the tactile feedback when the keycap 410 is pressed. Tactile feedback is positively correlated with the keyboard input experience; for example, the greater the key travel, the better the tactile feedback and the better the keyboard input experience. Additionally, the key travel also affects the reduction of the keyboard thickness 400 (e.g., ...). Figure 3 The difficulty of reducing keyboard thickness (e.g., the greater the key travel, the more difficult it is to reduce the keyboard's thickness by 400mm). Therefore, reducing keyboard thickness by decreasing key travel will result in poorer tactile feedback and a reduced typing experience.

[0058] Figure 4This is a cross-sectional schematic diagram showing the interaction of a backlight module 460, a membrane keypad 450, and a metal plate 440 in related technologies.

[0059] In one implementation, see Figure 4 The membrane key 450 includes a first insulating layer 451, a second insulating layer 452, a third insulating layer 453, a first adhesive layer 454, a second adhesive layer 455, a first bump 456, a second bump 457, and a silver paste trace 458. The first insulating layer 451, the first adhesive layer 454, the second insulating layer 452, the second adhesive layer 455, and the third insulating layer 453 are stacked sequentially. The third insulating layer 453 is fixedly connected to the metal plate 440. The first insulating layer 451 is used to contact the elastic element. The first bump 456 and the second bump 457 are located between the first insulating layer 451 and the third insulating layer 453. The first bump 456 is fixedly connected to the first insulating layer 451 and spaced apart from the second insulating layer 452. The second bump 457 is fixedly connected to the third insulating layer 453 and spaced apart from the second insulating layer 452. When the keycap 410 is not pressed, the first bump 456 and the second bump 457 are spaced apart. The silver paste trace 458 is electrically connected to the first bump 456 and the second bump 457. The silver paste trace 458, the first bump 456 and the second bump 457 can form a membrane switch. When the rubber dome 430 is pressed to a certain position, the first bump 456 and the second bump 457 make electrical contact, so that the membrane switch is turned on.

[0060] However, during the movement of the first bump 456 relative to the second bump 457, the first insulating layer 451 will cause part of the silver paste trace 458 to move, which can easily cause breakage at the corner of the silver paste trace 458 near the first insulating layer 451, resulting in low reliability of the membrane switch and easy failure of the button function. In addition, the membrane button 450 is composed of three insulating layers and two adhesive layers. In the process of manufacturing the membrane button 450, multiple assembly and bonding processes are required, resulting in many assembly steps and low production efficiency.

[0061] Furthermore, the relatively large thickness of the three insulating layers results in a larger overall thickness of the membrane keypad 450, thus increasing the keyboard's thickness. In addition, to prevent accidental contact between the first protrusion 456 and the second protrusion 457, a gap is required between the first insulating layer 451 and the second insulating layer 452. This means the second insulating layer 452 is typically designed to be quite thick, further contributing to the thickness of the membrane keypad 450 and consequently increasing the keyboard's overall thickness.

[0062] In one implementation, see further. Figure 4The backlight module 460 includes a third adhesive layer 461, a light-blocking layer 462, a light-guiding layer 463, a reflective layer 464, and an LED strip layer 465, all stacked together. The third adhesive layer 461 is fixedly connected to a metal plate 440, thus fixing the backlight module 460 to the metal. The LED strip layer 465 has multiple LEDs. The light-blocking layer 462 has a light-passing area located below the keycap 410. However, the backlight module 460 of related technologies has a large number of layers and a relatively large thickness of the LED strip layer 465, resulting in a large backlight module 460 and consequently a large keyboard thickness.

[0063] In summary, the keyboard 400 of this technology has a relatively large thickness. When integrated into electronic devices, such as laptops, it increases the difficulty of achieving a thinner and lighter design. Furthermore, while ensuring a good typing experience, the keyboard thickness of the keyboard 400 is already close to the physical limits of this design concept, making further thickness reduction difficult. In addition, the keyboard 400 of this technology also suffers from low reliability and low production efficiency.

[0064] Figure 5 This is a cross-sectional schematic diagram of a keyboard 200 provided in an embodiment of this application.

[0065] Therefore, in the embodiments of this application, see Figure 5 The keyboard 200 includes a key assembly 210, a circuit board 220, a first contact 270, an organic light-emitting diode (OLED) layer 230, and a flexible light-transmitting layer 260.

[0066] The number of button components 210 can be one (e.g. Figure 5 (As shown) or more. The key assembly 210 has a pressed state and a non-pressed state. When the user presses the key assembly 210 with their finger, the key assembly 210 can switch from the non-pressed state to the pressed state. The keyboard 200 can output the corresponding key signal according to the pressed key assembly 210. For example, if the pressed key assembly 210 is the number key corresponding to the number "1", then the keyboard 200 can output the key signal corresponding to the number "1".

[0067] See also Figure 5 Along the thickness direction of circuit board 220 (e.g.) Figure 5(Z-direction), the button assembly 210 and the circuit board 220 are located on both sides of the light-transmitting layer 260, and the light-transmitting layer 260 and the organic light-emitting diode layer 230 are located on both sides of the circuit board 220. The light-transmitting layer 260 is fixedly connected to the circuit board 220 and contacts the button assembly 210. The organic light-emitting diode layer 230 is disposed on the surface of the circuit board 220 and is electrically connected to the circuit board 220. The circuit board 220 may contain a driving circuit for controlling the light emission of the organic light-emitting diode layer 230. The circuit board 220 has a light-transmitting area 221, which can transmit light emitted by the organic light-emitting diode layer 230 (such as light emitted by the organic light-emitting diode layer 230). Figure 5 (Solid arrow in the middle) Light is transmitted to the light-transmitting layer 260. The light-transmitting layer 260 can transmit light from the light-transmitting area 221 to the area where the button assembly 210 is located, which can ensure that the light emitted by the organic light-emitting diode layer 230 illuminates the button characters of the button assembly 210, making the button characters light up, thereby improving the user experience.

[0068] In some embodiments, when the organic light-emitting diode layer 230 is disposed on the surface of the circuit board 220, the organic light-emitting diode layer 230 and the circuit board 220 can constitute a self-emissive circuit board module.

[0069] Compared to existing technologies that use LEDs as the light source for illuminating key characters, this technology suffers from the problem of a thick backlight module, resulting in a thick keyboard. In this embodiment, an organic light-emitting diode (OLED) layer 230 is used as the light source for illuminating key characters. The thickness of the OLED layer 230 can be on the order of hundreds of nanometers. The very small thickness of the OLED layer 230 has minimal impact on the keyboard thickness, contributing to a reduction in keyboard thickness. Furthermore, by using the OLED layer 230 instead of the LED strip layer in the prior art, the light guide layer in the prior art is eliminated, further reducing the keyboard thickness.

[0070] Furthermore, the reason for reducing the keyboard thickness using the organic light-emitting diode (OLED) layer 230 is that the OLED layer 230 itself has a small thickness, and it does not need to be combined with the existing light guide layer, thus reducing the number of layers in the keyboard 200. Therefore, using the OLED layer 230 as the light source for illuminating the key characters allows for a larger key travel design while reducing the keyboard thickness, ensuring a better keyboard input experience.

[0071] See also Figure 5The circuit board 220 has a receiving groove 222 on the side facing the elastic layer. The circuit board 220 includes a button circuit 223, which includes a second contact 224 located inside the receiving groove 222. A first contact 270 is fixedly connected to the side of the light-transmitting layer 260 facing the circuit board 220. On a projection plane perpendicular to the thickness direction of the circuit board 220, the orthographic projection of the first contact 270 at least partially overlaps with the orthographic projection of the second contact 224. The orthographic projection of the first contact 270 is located inside the orthographic projection of the receiving groove 222, which can also be understood as the orthographic projection of the receiving groove 222 covering the orthographic projection of the first contact 270. The first contact 270 is used to make electrical contact with the second contact 224 to turn on the button circuit 223.

[0072] See also Figure 5 When the key assembly 210 is not pressed, the first contact 270 and the second contact 224 are spaced apart and do not make contact. The key circuit 223 is in an open state, and the keyboard 200 does not output key signals. When the key assembly 210 is pressed, the first contact 270 and the second contact 224 make electrical contact, the key circuit 223 is turned on, and the circuit board 220 can output the corresponding key signal according to the pressed key assembly 210, thereby realizing the signal input function of the keyboard 200.

[0073] Because the light-transmitting layer 260 is elastic, when the button assembly 210 presses the light-transmitting layer 260, the light-transmitting layer 260 can drive the first contact 270 to move, causing the first contact 270 and the second contact 224 to make electrical contact or separate. When the button assembly 210 switches from a non-pressed state to a pressed state, the button assembly 210 presses the light-transmitting layer 260, causing the light-transmitting layer 260 to elastically deform. Simultaneously, the light-transmitting layer 260 forms a groove structure concave towards the first contact 270, driving the first contact 270 towards the second contact 224 until the first contact 270 and the second contact 224 make electrical contact. When the pressing assembly switches from a pressed state to a non-pressed state, as the light-transmitting layer 260 rebounds to its initial position, it drives the first contact 270 away from the second contact 224, causing the first contact 270 to separate from the second contact 224.

[0074] Compared to existing membrane keyboards, which suffer from significant thickness and low production efficiency, this application embodiment integrates the button circuit 223, which enables button functionality, onto a circuit board 220. The circuit board 220 can be designed with a thinner profile, minimizing its impact on keyboard thickness and further contributing to a reduction in overall keyboard thickness. Furthermore, forming the button circuit 223 within the circuit board 220 is relatively simple, improving the manufacturing efficiency of the circuit board 220.

[0075] Furthermore, by arranging the receiving groove 222 on the side of the circuit board 220 facing the light-transmitting layer 260, accidental contact between the first contact 270 and the second contact 224 can be avoided, thus preventing accidental conduction of the key circuit 223. By providing the receiving groove 222, a structure similar to the second insulating layer in the prior art can be avoided between the light-transmitting layer 260 and the circuit board 220. In other words, this embodiment eliminates the second insulating layer of the prior art, which helps to reduce the keyboard thickness.

[0076] In summary, by integrating the key circuit 223 onto the circuit board 220 and providing a receiving groove 222 on the circuit board 220, a large key travel design can be achieved while further reducing the keyboard thickness, ensuring a good keyboard input experience.

[0077] In one implementation, compared to the keyboard thickness of existing laptops, [the thickness will be reduced]. Figure 5 When the keyboard 200 shown is integrated into a laptop computer, its thickness can be reduced by approximately 50% without changing the key travel. For example, the thickness of the backlight module in a conventional keyboard is 0.37 mm, the membrane key thickness is 0.2 mm, the organic light-emitting diode layer 230 thickness is 0.01 mm, and the circuit board 220 thickness is 0.12 mm. Therefore, the total thickness of the organic light-emitting diode layer 230 and the circuit board 220 is reduced by 0.44 mm compared to the total thickness of the backlight module and the membrane key, which significantly reduces the keyboard thickness and contributes to the thinner and lighter design of the keyboard 200.

[0078] In some possible implementations, at least a portion of the orthographic projection of the receiving groove 222 coincides with the orthographic projection of the light-transmitting region 221 on the projection plane. Therefore, at least a portion of the receiving groove 222 is located inside the light-transmitting region 221, for example... Figure 5 As shown, the entire accommodating groove 222 is located inside the light-transmitting area 221. This arrangement reduces the difficulty for light emitted from the organic light-emitting diode layer 230 to pass through the circuit board 220.

[0079] Of course, in some embodiments, the orthographic projection of the receiving groove 222 and the orthographic projection of the light-transmitting area 221 on the projection plane may not coincide. The orthographic projections of the two may be spaced apart along a direction perpendicular to the thickness direction of the circuit board 220. In this case, since the light emission angle of the organic light-emitting diode layer 230 is 360°, the light emitted by the organic light-emitting diode layer 230 can also illuminate the area where the button assembly 210 is located.

[0080] In this embodiment, the orthographic projection of the light-transmitting region 221 on the projection plane can be part or all of the orthographic projection of the circuit board 220. Therefore, a portion or the entirety of the circuit board 220 can constitute the light-transmitting region 221. Furthermore, when a portion of the circuit board 220 constitutes the light-transmitting region 221, the light-transmitting region 221 can be formed by at least one light-transmitting sub-region. When there are multiple light-transmitting sub-regions, adjacent light-transmitting sub-regions are spaced apart.

[0081] See also the following for some possible implementations. Figure 5 The key assembly 210 includes a keycap 211, a scissor-switch mechanism 213, and a light-transmitting elastic element 212. Along the thickness direction of the circuit board 220, the elastic element 212 and the scissor-switch mechanism 213 are both located between the keycap 211 and the light-transmitting layer 260. The two ends of the elastic element 212 are in contact with the keycap 211 and the light-transmitting layer 260, respectively. The first end and the second end of the scissor-switch mechanism 213 are connected to the keycap 211 and the support substrate 240, respectively.

[0082] The keycap 211 is a structural component that comes into contact with the user's fingers. When pressed by the user's fingers, the keycap 211 can move up and down relative to the light-transmitting layer 260 and press the elastic element 212.

[0083] During the vertical movement of the keycap 211 relative to the light-transmitting layer 260, the scissor-switch mechanism 213 supports the keycap 211 in a translating motion, improving the stability of the keycap 211's movement and preventing issues such as the keycap 211 lifting up or becoming unresponsive during operation. Furthermore, during the pressing process of the keycap 211, the scissor-switch mechanism 213 provides opposing support, creating noticeable force feedback and enhancing the tactile feedback of the keycap 211 during pressing.

[0084] In some embodiments, the scissor mechanism 213 may include a first support member and a second support member arranged in a cross configuration, the first support member and the second support member forming an "X" shaped support structure to support the keycap 211.

[0085] In some embodiments, the scissor mechanism 213 can be made of a light-transmitting material, which can prevent the scissor mechanism 213 from obstructing the light emitted from the light-transmitting layer 260 from shining on the keycap 211.

[0086] During the up-and-down movement of the keycap 211 relative to the light-transmitting layer 260, the elastic element 212 undergoes elastic deformation under the pressure of the keycap 211. As the elastic element 212 changes, it can cause local elastic deformation of the light-transmitting layer 260, causing the first contact 270 to move relative to the second contact 224, so that the first contact 270 and the second contact 224 can make or separate electrical contact.

[0087] The elastic element 212 may include, but is not limited to, a rubber dome (such as...). Figure 5 The structure includes a spring, an elastic cylinder, etc. The rubber dome can be called a rubber dome, a dome switch, or a silicone cap. The rubber dome has a protrusion facing the light-transmitting layer 260. When the keycap 211 is pressed, it moves towards the light-transmitting layer 260, causing it to press against the rubber dome. This causes the protrusion of the rubber dome to move towards the light-transmitting layer 260, until the first contact 270 and the second contact 224 make electrical contact.

[0088] Since the elastic element 212 is disposed between the keycap 211 and the light-transmitting layer 260, in order to allow the light emitted from the light-transmitting layer 260 to irradiate the keycap 211, in some embodiments, the material of the elastic element 212 can be made of a light-transmitting material with elasticity.

[0089] In this embodiment, the material of the light-transmitting layer 260 may include, but is not limited to, elastic light-transmitting materials such as polyethylene terephthalate (PET), polyethylene terephthalate glycol-modified (PETG), and thermoplastic polyurethane (TPU).

[0090] In some embodiments, see continue to see Figure 5 The keyboard 200 also includes a first adhesive layer 280, which is located between the circuit board 220 and the light-transmitting layer 260. The two sides of the first adhesive layer 280 are respectively bonded to the circuit board 220 and the light-transmitting layer 260, so as to achieve a fixed connection between the circuit board 220 and the light-transmitting layer 260.

[0091] In some embodiments, in order for light to pass through the first adhesive layer 280, the first adhesive layer 280 may be made of an adhesive that is capable of transmitting light, such as epoxy resin adhesive, optically clear adhesive (OCA), etc.

[0092] See also the following for some possible implementations. Figure 5 The keyboard 200 also includes a light-blocking layer 250. Along the thickness direction of the circuit board 220, the light-blocking layer 250 is fixedly connected to the side of the light-transmitting layer 260 away from the circuit board 220. The light-blocking layer 250 has a first opening 251, which is used to block light emitted from the light-transmitting layer 260 (such as light emitted from the circuit board 220). Figure 5(Solid arrow in the middle) The light is transmitted to the side of the light-blocking layer 250 away from the light-transmitting layer 260, and the key assembly 210 contacts the light-transmitting layer 260 through the first opening 251. This arrangement allows the light emitted from the light-transmitting layer 260 to illuminate a preset range, for example, the light emitted from the light-transmitting layer 260 to illuminate the keycaps 211, preventing light from illuminating the gap between two adjacent keycaps 211.

[0093] The light-blocking layer 250 can be made of a material that is opaque or has very low light transmittance. For example, the light-blocking layer 250 can be made of black ink, or it can be made of opaque tape.

[0094] The first opening 251 is a through-hole structure that penetrates the light-blocking layer 250 along the thickness direction of the circuit board 220. The first opening 251 may be, but is not limited to, a circular through-hole, a square through-hole, or other through-hole structures. There may be one or more first openings 251. Each first opening 251 corresponds to a button assembly 210, and each button assembly 210 contacts the light-transmitting layer 260 through its corresponding first opening 251. In some embodiments, when there are multiple first openings 251, the light-blocking layer 250 is a mesh structure.

[0095] In some possible implementations, the orthographic projection of the first opening 251 at least partially overlaps with the orthographic projection of the light-transmitting region 221 on the projection plane. For example, the orthographic projection of the light-transmitting region 221 covers the orthographic projection of the first opening 251, and the edge of the orthographic projection of the light-transmitting region 221 is spaced apart from the edge of the orthographic projection of the first opening 251. This arrangement reduces the difficulty for light emitted from the organic light-emitting diode layer 230 to pass through the light-blocking layer 250.

[0096] In some possible implementations, the orthographic projection of the first opening 251 on the projection plane at least partially coincides with the orthographic projection of the receiving groove 222; for example, the orthographic projection of the first opening 251 covers the orthographic projection of the receiving groove 222. This arrangement reduces the difficulty for light emitted from the organic light-emitting diode layer 230 to enter the first opening 251.

[0097] In one implementation, see [link to implementation details]. Figure 5 One end of the elastic element 212 of the button assembly 210 passes through the first opening 251 and contacts the light-transmitting layer 260, so as to achieve contact between the light-transmitting layer 260 and the button assembly 210.

[0098] It should be noted that, in addition to being fixedly connected to the side of the light-transmitting layer 260 away from the circuit board 220, in some embodiments, the light-blocking layer 250 can also be disposed between the light-transmitting layer 260 and the circuit board 220. In this case, the light-blocking layer 250 is also provided with a first opening 251. The first opening 251 is used to transmit light from the light-transmitting area 221 to the light-transmitting layer 260. On the projection plane, the orthographic projection of the first contact 270 is located inside the orthographic projection of the first opening 251. The first contact 270 can make electrical contact with the second contact 224 through the first opening 251.

[0099] See also the following for some possible implementations. Figure 5 The keyboard 200 also includes a support substrate 240. Along the thickness direction of the circuit board 220, the support substrate 240 is located on the side of the organic light-emitting diode layer 230 away from the circuit board 220, and the support substrate 240 is fixedly connected to the organic light-emitting diode layer 230. This arrangement can support the circuit board 220, the organic light-emitting diode layer 230, and other structures.

[0100] The material of the support substrate 240 can be a metallic material or a non-metallic material.

[0101] In some embodiments, a second adhesive layer (not shown in the figure) may be provided between the support substrate 240 and the organic light-emitting diode layer 230. The support substrate 240 and the organic light-emitting diode layer 230 are respectively connected to both sides of the second adhesive layer to achieve a fixed connection between the support substrate 240 and the organic light-emitting diode layer 230.

[0102] The second adhesive layer can be connected to the encapsulation layer 234 of the organic light-emitting diode layer 230 to achieve a fixed connection between the two.

[0103] See also the following for some possible implementations. Figure 5 Along the thickness direction of the circuit board 220, the organic light-emitting diode layer 230 includes a first electrode layer 231, an organic light-emitting layer 232, and a second electrode layer 233 stacked together, with the first electrode layer 231 attached to the surface of the circuit board 220. Therefore, the circuit board 220 can serve as the substrate for the organic light-emitting diode layer 230, and the organic light-emitting diode layer 230 can be directly formed on the surface of the circuit board 220 using OLED manufacturing processes. This further reduces the stacking height of the circuit board 220 and the organic light-emitting diode layer 230, further minimizing the impact on keyboard thickness and contributing to a further reduction in keyboard thickness.

[0104] In this configuration, one of the first electrode layer 231 and the second electrode layer 233 is an anode layer and the other is a cathode layer, for example in... Figure 5 In the first electrode layer 231, the anode layer is used, and the second electrode layer 233 is used as the cathode layer.

[0105] In some embodiments, the anode layer can receive a drive signal output from the drive circuit of the circuit board 220, the cathode can receive a reference voltage signal (or cathode power signal), and the organic light-emitting layer 232 emits light under the combined action of the drive signal and the reference voltage signal.

[0106] It should be noted that, in addition to using the circuit board 220 as the substrate for carrying the organic light-emitting diode layer 230, in some embodiments, the organic light-emitting diode layer 230 may also include a substrate, which is located between the circuit board 220 and the first electrode layer 231. The substrate is disposed on the surface of the circuit board 220, and the first electrode layer 231, the organic light-emitting layer 232, and the second electrode layer 233 are all disposed on the same side of the substrate. The first electrode layer 231 is disposed on the surface of the substrate.

[0107] In order for the light emitted by the organic light-emitting diode layer 230 to illuminate the circuit board 220, in some possible implementations, the material of the first electrode layer 231 is a light-transmitting conductive material, for example, it can be a metal oxide (ITO).

[0108] See also the following for some possible implementations. Figure 5 The organic light-emitting diode (OLED) layer 230 also includes an encapsulation layer 234, which is located on the side of the second electrode layer 233 away from the OLED layer 232 and covers the surface of the second electrode layer 233. This configuration allows the encapsulation layer 234 to isolate the OLED layer 230 from water and air, protecting it from damage and improving its reliability.

[0109] The material of the encapsulation layer 234 may include, but is not limited to, a surrounding resin or other similar material.

[0110] In some embodiments, when the circuit board 220 is used as the substrate to support the organic light-emitting diode layer 230, after the circuit board 220 is supported and formed, the first electrode layer 231, organic light-emitting layer 232, second electrode layer 233 and other structures of the organic light-emitting diode layer 230 can be deposited on the circuit board 220 by processes such as scraping, roll-to-roll printing, and vapor deposition, and then encapsulated with materials such as epoxy resin to form an encapsulation layer 234.

[0111] In one embodiment, a thin-film encapsulation (TFE) encapsulation can be performed using materials such as epoxy resin to form an encapsulation layer 234.

[0112] Figure 6 This is another cross-sectional schematic diagram of the organic light-emitting diode layer 230 provided in an embodiment of this application.

[0113] See also some possible implementations. Figure 6 The organic light-emitting diode layer 230 includes multiple light-emitting units 237, and each light-emitting unit 237 includes a first electrode layer 231, an organic light-emitting layer 232, and a second electrode layer 233 stacked together. With this configuration, the organic light-emitting diode layer 230 is equivalent to an array light source composed of multiple light source arrays.

[0114] See also Figure 6 The first electrode layers 231 of two adjacent light-emitting units 237 are spaced apart, the organic light-emitting layers 232 of two adjacent light-emitting units 237 are spaced apart, and the second electrode layers 233 of two adjacent light-emitting units 237 are an integral structure.

[0115] In some embodiments, to separate adjacent first electrode layers 231, see continue. Figure 6 The organic light-emitting diode layer 230 also includes a first spacer layer 235, which may include a plurality of first through-holes penetrating the first spacer layer 235. The first through-holes are correspondingly disposed with the first electrode layer 231, and the first through-holes accommodate the corresponding first electrode layer 231. Thus, the first spacer layer 235 is equivalent to a mesh structure.

[0116] In some embodiments, to separate adjacent second electrode layers 233, see continue to the previous section. Figure 6 The organic light-emitting diode layer 230 further includes a second spacer layer 236, which may include a plurality of second through-holes penetrating the second spacer layer 236. The second through-holes are correspondingly disposed with the second electrode layer 233, and the second through-holes accommodate the corresponding second electrode layer 233. Thus, the second spacer layer 236 is equivalent to a mesh structure.

[0117] It should be noted that, in addition to being composed of multiple light-emitting units 237, in some embodiments, the organic light-emitting diode layer 230 can also be composed of a single light-emitting unit 237. In this case, the number of the first electrode layer 231, the second electrode layer 233, and the organic light-emitting layer 232 is one, and the organic light-emitting diode layer 230 is equivalent to a surface light source.

[0118] In some possible implementations, the circuit board 220 is a flexible printed circuit (FPC). With this configuration, the circuit board 220 can serve as a substrate for carrying the organic light-emitting diode layer 230, and the organic light-emitting diode layer 230 can be formed directly on the surface of the circuit board 220.

[0119] In some possible implementations, the surface of the circuit board 220 that contacts the first electrode layer 231 is made of glass or transparent polyimide. This arrangement allows the first electrode layer 231 to be directly formed on the surface of the circuit board 220, thereby reducing the stack thickness of the circuit board 220 and the organic light-emitting diode layer 230. Furthermore, it is compatible with existing processes, reducing the difficulty and cost of forming the organic light-emitting diode layer 230 on the circuit board 220.

[0120] It should be noted that when the material of the surface of the circuit board 220 in contact with the first electrode layer 231 is glass, the circuit board 220 can be a flexible circuit board or a printed circuit board.

[0121] In some possible implementations, circuit board 220 is a transparent circuit board, with at least a portion of it allowing light to pass through. Circuit board 220 typically includes an insulating dielectric layer and a conductive layer. The conductive layer forms traces, which may include, but are not limited to, structures forming at least a portion of the button circuit 223 or a drive circuit. To enable light transmission through circuit board 220, the insulating dielectric layer is made of a light-transmitting insulating material, ensuring the circuit board 220 has transparent properties. Furthermore, the conductive layer can be made of a light-transmitting or opaque material. When the conductive layer is made of an opaque material, the traces formed by the conductive layer are very narrow, resulting in a small trace area and minimal impact on light.

[0122] In this embodiment, the number of button circuits 223 is the same as the number of button components 210, and there can be one or more button circuits 223. When there are multiple button circuits 223, each button circuit 223 corresponds to a button component 210. When a user presses a button component 210, the button circuit 223 corresponding to the pressed button component 210 is turned on to generate the corresponding key signal.

[0123] Figure 7 for Figure 5 A schematic diagram of point A in the middle.

[0124] See also some possible implementations. Figure 7 The key circuit 223 includes a first trace 225 and two second contacts 224, which are spaced apart. Both ends of the first trace 225 are electrically connected to the two second contacts 224 respectively. This configuration ensures that the first trace 225 remains largely undeformed during the movement of the first contact 270 relative to the second contact 224, preventing breakage at the corners of the first trace 225 and improving the reliability of the key circuit 223, thereby enhancing the reliability of the keyboard 200. Furthermore, the first trace 225's placement inside the circuit board 220 helps to further reduce the keyboard's thickness.

[0125] In this configuration, on the projection plane, the orthographic projection of the first contact 270 coincides with at least a portion of the orthographic projection of any one of the second contacts 224, so that the first contact 270 can simultaneously make electrical contact with both second contacts 224, thereby turning on the button circuit 223.

[0126] The first trace 225 can be constructed from a transparent or opaque conductive material; for example, it can be made of copper. It should be noted that when at least a portion of the first trace 225 is located within the transparent region 221 and the first trace 225 is made of an opaque conductive material, the width of the first trace 225 is very small, and its impact on the light transmission effect of the transparent region 221 is minimal. Furthermore, considering that the organic light-emitting diode layer 230 can emit light at 360°, it can emit light from all parts of the transparent region 221, making the transparent region 221 resemble a surface light source.

[0127] Figure 8 This is a cross-sectional schematic diagram of another structure of the keyboard 200 provided in an embodiment of this application.

[0128] See also some possible implementations. Figure 8 The key circuit 223 also includes a second trace 226, one end of which is electrically connected to the second contact 224. The keyboard 200 also includes an electrical connection wire 290, one end of which is electrically connected to the first contact 270, and the other end of which is electrically connected to the other end of the second trace 226. This configuration ensures that the key circuit 223 is activated when the first contact 270 and the second contact 224 are in electrical contact.

[0129] In some embodiments, to electrically connect the electrical connection line 290 to the second trace 226, see continue to the previous section. Figure 8 The button circuit 223 may also include a third contact 227, which is disposed on the surface of the circuit board 220 facing the light-transmitting layer 260. The third contact 227 is electrically connected to the other end of the second trace 226 and is electrically in contact with the electrical connection line 290.

[0130] Figure 9 This is a cross-sectional schematic diagram of another structure of the keyboard 200 provided in an embodiment of this application.

[0131] The preceding text describes the keyboard 200 as having both a support substrate 240 and a light-blocking layer 250; however, in some possible implementations, see [link to relevant documentation]. Figure 9 The supporting substrate 240 is fixedly connected to the light-transmitting layer 260. Along the thickness direction of the circuit board 220, the supporting substrate 240 is located on the side of the light-transmitting layer 260 away from the circuit board 220. The supporting substrate 240 has a second opening 241, which is used to allow light emitted from the light-transmitting layer 260 (such as light emitted from the circuit board 220) to pass through. Figure 9 (Solid arrow in the middle) The light is transmitted to the side of the support substrate 240 away from the light-transmitting layer 260, and the key assembly 210 contacts the light-transmitting layer 260 through the second opening 241. Therefore, the keyboard 200 eliminates the light-blocking layer 250. In addition to supporting the organic light-emitting diode layer 230, circuit board 220, and other structures, the support substrate 240 also performs the same light-blocking function as the light-blocking layer 250, ensuring that the light emitted by the organic light-emitting diode layer 230 illuminates a predetermined range, thus avoiding light leakage. Furthermore, the number of layers in the keyboard 200 can be reduced, further decreasing the keyboard thickness.

[0132] The support substrate 240 can be made of opaque or low-transmittance metallic or non-metallic materials.

[0133] The second opening 241 is a through-hole structure that penetrates the supporting substrate 240 along the thickness direction of the circuit board 220. The second opening 241 may be, but is not limited to, a circular through-hole, a square through-hole, or other through-hole structures. There may be one or more second openings 241. Each second opening 241 corresponds to a button assembly 210, and each button assembly 210 contacts the light-transmitting layer 260 through its corresponding second opening 241. In some embodiments, when there are multiple second openings 241, the supporting substrate 240 is a mesh structure.

[0134] In some possible implementations, the orthographic projection of the second opening 241 at least partially overlaps with the orthographic projection of the light-transmitting region 221 on the projection plane. For example, the orthographic projection of the light-transmitting region 221 covers the orthographic projection of the second opening 241, and the edge of the orthographic projection of the light-transmitting region 221 is spaced apart from the edge of the orthographic projection of the second opening 241. This arrangement reduces the difficulty for light emitted from the organic light-emitting diode layer 230 to pass through the support substrate 240.

[0135] In some possible implementations, the orthographic projection of the second opening 241 on the projection plane at least partially coincides with the orthographic projection of the receiving groove 222; for example, the orthographic projection of the second opening 241 covers the orthographic projection of the receiving groove 222. This arrangement reduces the difficulty for light emitted from the organic light-emitting diode layer 230 to enter the second opening 241.

[0136] In one implementation, see [link to implementation details]. Figure 5 One end of the elastic element 212 of the button assembly 210 passes through the second opening 241 and contacts the light-transmitting layer 260, so as to achieve contact between the light-transmitting layer 260 and the button assembly 210.

[0137] It should be noted that, in addition to being fixedly connected to the side of the light-transmitting layer 260 away from the circuit board 220, in some embodiments, the support substrate 240 may also be disposed between the light-transmitting layer 260 and the circuit board 220. In this case, the support substrate 240 is also provided with a second opening 241. The second opening 241 is used to transmit light from the light-transmitting area 221 to the light-transmitting layer 260. On the projection plane, the orthographic projection of the first contact 270 is located inside the orthographic projection of the second opening 241. The first contact 270 can make electrical contact with the second contact 224 through the second opening 241.

[0138] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. The terms "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A keyboard (200), characterized in that, It includes a button assembly (210), a circuit board (220), a first contact (270), an organic light-emitting diode layer (230), and a flexible light-transmitting layer (260). Along the thickness direction of the circuit board (220), the button assembly (210) and the circuit board (220) are respectively located on both sides of the light-transmitting layer (260), the light-transmitting layer (260) and the organic light-emitting diode layer (230) are respectively located on both sides of the circuit board (220), the light-transmitting layer (260) is fixedly connected to the circuit board (220) and in contact with the button assembly (210), the organic light-emitting diode layer (230) is electrically connected to the circuit board (220), and the organic light-emitting diode layer (230) is disposed on the surface of the circuit board (220); The circuit board (220) has a light-transmitting area (221), which can transmit light emitted from the organic light-emitting diode layer (230) to the light-transmitting layer (260), and the light-transmitting layer (260) can transmit light from the light-transmitting area (221) to the area where the button assembly (210) is located; The circuit board (220) has a receiving groove (222) on the side facing the elastic layer. The circuit board (220) includes a button circuit (223). The button circuit (223) includes a second contact (224). The second contact (224) is located inside the receiving groove (222). The first contact (270) is fixedly connected to the side of the light-transmitting layer (260) facing the circuit board (220). On the projection plane perpendicular to the thickness direction of the circuit board (220), the orthographic projection of the first contact (270) and the orthographic projection of the second contact (224) overlap at least partially. The orthographic projection of the first contact (270) is located inside the orthographic projection of the receiving groove (222). The first contact (270) is used to make electrical contact with the second contact (224) so ​​that the button circuit (223) is turned on.

2. The keyboard (200) according to claim 1, characterized in that, Along the thickness direction of the circuit board (220), the organic light-emitting diode layer (230) includes a first electrode layer (231), an organic light-emitting layer (232), and a second electrode layer (233) stacked together, with the first electrode layer (231) attached to the surface of the circuit board (220).

3. The keyboard (200) according to claim 2, characterized in that, The first electrode layer (231) is an anode layer, and the second electrode layer (233) is a cathode layer.

4. The keyboard (200) according to claim 2, characterized in that, The organic light-emitting diode layer (230) includes a plurality of light-emitting units (237), each of the light-emitting units (237) including a first electrode layer (231), the organic light-emitting layer (232) and the second electrode layer (233) stacked together.

5. The keyboard (200) according to claim 2, characterized in that, The material of the surface of the circuit board (220) in contact with the first electrode layer (231) is glass or transparent polyimide, and / or the material of the first electrode layer (231) is a transparent conductive material.

6. The keyboard (200) according to claim 1, characterized in that, The circuit board (220) is a flexible circuit board.

7. The keyboard (200) according to claim 1, characterized in that, On the projection plane, at least a portion of the orthographic projection of the receiving groove (222) coincides with the orthographic projection of the light-transmitting area (221).

8. The keyboard (200) according to claim 1, characterized in that, The button circuit (223) includes a first trace (225) and two second contacts (224), which are spaced apart. The two ends of the first trace (225) are electrically connected to the two second contacts (224) respectively.

9. The keyboard (200) according to claim 1, characterized in that, The button circuit (223) further includes a second trace (226), one end of which is electrically connected to the second contact (224); The keyboard (200) also includes an electrical connection wire (290), one end of which is electrically connected to the first contact (270), and the other end of which is electrically connected to the other end of the second trace (226).

10. The keyboard (200) according to any one of claims 1-9, characterized in that, The keyboard (200) also includes a support substrate (240). Along the thickness direction of the circuit board (220), the support substrate (240) is located on the side of the organic light-emitting diode layer (230) away from the circuit board (220), and the support substrate (240) is fixedly connected to the organic light-emitting diode layer (230).

11. The keyboard (200) according to claim 10, characterized in that, The keyboard (200) further includes a light-blocking layer (250). Along the thickness direction of the circuit board (220), the light-blocking layer (250) is fixedly connected to the side of the light-transmitting layer (260) away from the circuit board (220). The light-blocking layer (250) has a first opening (251). The first opening (251) is used to transmit the light emitted from the light-transmitting layer (260) to the side of the light-blocking layer (250) away from the light-transmitting layer (260). The key assembly (210) contacts the light-transmitting layer (260) through the first opening (251).

12. The keyboard (200) according to claim 11, characterized in that, On the projection plane, the orthographic projection of the first opening (251) at least partially coincides with the orthographic projection of the light-transmitting area (221).

13. The keyboard (200) according to any one of claims 1-9, characterized in that, The keyboard (200) also includes a support substrate (240), which is fixedly connected to the light-transmitting layer (260). Along the thickness direction of the circuit board (220), the support substrate (240) is located on the side of the light-transmitting layer (260) away from the circuit board (220). The support substrate (240) has a second opening (241) for transmitting light emitted from the light-transmitting layer (260) to the side of the support substrate (240) away from the light-transmitting layer (260), and the button assembly (210) contacts the light-transmitting layer (260) through the second opening (241).

14. The keyboard (200) according to claim 13, characterized in that, On the projection plane, the orthographic projection of the second opening (241) at least partially coincides with the orthographic projection of the light-transmitting area (221).

15. The keyboard (200) according to any one of claims 1-9, characterized in that, The key assembly (210) includes a keycap (211), a scissor mechanism (213), and a light-transmitting elastic element (212). Along the thickness direction of the circuit board (220), the elastic element (212) and the scissor mechanism (213) are both located between the keycap (211) and the light-transmitting layer (260). The two ends of the elastic element (212) are in contact with the keycap (211) and the light-transmitting layer (260) respectively, and the scissor mechanism (213) is connected to the keycap (211).

16. An electronic device (100), characterized in that, Includes the keyboard (200) as described in any one of claims 1-15.

17. An electronic system, characterized in that, It includes an electronic device (100) and a keyboard (200) as described in any one of claims 1-15, the keyboard (200) being communicatively connected to the electronic device (100).

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