Notebook computer keyboard capable of realizing keyboard backlight through single-layer circuit board

Abstract

The invention discloses a notebook computer keyboard capable of realizing keyboard backlight through a single-layer circuit board, which comprises a single-layer metal reinforcing plate, a backlight keyboard main control chip and a plurality of groups of light-emitting control units are arranged on a signal circuit layer, and an insulating unit covers the signal circuit layer and is bonded on the metal reinforcing plate. A plurality of elastic piece switches are bonded on the insulating film through bonding units, each elastic piece switch is provided with a light-transmitting windowing part, a plurality of light-emitting diode chips corresponding to one elastic piece switch are arranged under the key, and each light-emitting diode chip displays backlight through the light-transmitting windowing part of the corresponding elastic piece switch. The keyboard solves the problems that a current notebook computer keyboard adopts a multi-layer circuit design, so that the process is complex, the manufacturing cost is high, meanwhile, in the design of a traditional backlight keyboard, a light-emitting diode needs to avoid a key mechanical structure and cannot be arranged under keys, and the keyboard is inconvenient to use. The backlight effect is not ideal or an additional lighting effect treatment process needs to be added.

Description

Technical Field

[0001] The invention relates to the field of notebook computer keyboard design, and in particular to a notebook computer keyboard which realizes keyboard backlight through a single-layer circuit board. Background Art

[0002] In today's laptop keyboard design, especially keyboards with RGB / RGB+W backlight, multiple layers of circuits are usually required to achieve complex keyboard matrix control and backlight control. This physically multi-layer design not only increases the thickness of the circuit board, but also leads to the complexity of the production process, increasing production costs and manufacturing time. In addition, the signal interleaving between multiple layers of circuits can easily cause electromagnetic interference and signal transmission problems, affecting the stability and response speed of the keyboard.

[0003] Multi-layer circuit design requires the use of more complex processes and materials, resulting in high manufacturing costs, especially in large-scale production. Such high costs and long manufacturing cycles will affect the market competitiveness of products. In addition, the complexity of welding and assembly processes also leads to a high defective rate, increasing waste and rework costs in the production process. In the design of traditional backlit keyboards, light-emitting diodes need to avoid the mechanical structure of the keys and cannot be placed directly under the keys, resulting in unsatisfactory backlighting effects or the need to add additional light effect processing processes.

[0004] Therefore, there is a need for a new technical solution for laptop keyboards that achieves keyboard backlighting through a single-layer circuit board, in order to solve the problem that the current laptop keyboards use a multi-layer circuit design, which leads to complex processes and high manufacturing costs. At the same time, in the design of traditional backlit keyboards, the light-emitting diodes need to avoid the mechanical structure of the keys and cannot be arranged directly under the keys, resulting in unsatisfactory backlighting effects or the need to add additional light effect processing processes. Summary of the invention

[0005] The present application provides a laptop keyboard that realizes keyboard backlight through a single-layer circuit board, which solves the problem that the current laptop keyboard adopts a multi-layer circuit design, resulting in complex process and high manufacturing cost. At the same time, in the design of traditional backlight keyboards, the light-emitting diodes need to avoid the mechanical structure of the keys and cannot be arranged directly under the keys, resulting in unsatisfactory backlight effect or the need to add additional light effect processing technology.

[0006] In order to solve the above problems, the present application provides a laptop keyboard that realizes keyboard backlight through a single-layer circuit board, including: a single-layer metal reinforcement plate, a signal circuit layer with a keyboard matrix circuit and an RGB / RGB+W backlight circuit is arranged on the metal reinforcement plate, a backlight keyboard main control chip and multiple groups of light control units are arranged on the signal circuit layer, each group of light control units includes multiple light-emitting diode chips of different colors and a single-line return-to-zero code light-emitting diode drive control chip, an insulating unit covers the signal circuit layer and is bonded to the metal reinforcement plate, wherein multiple spring switches are bonded to the insulating film through the bonding unit, the spring switch is provided with a light-transmitting window portion, and multiple light-emitting diode chips corresponding to a spring switch are arranged directly below the key, and each light-emitting diode chip displays backlight through the light-transmitting window portion of the corresponding spring switch.

[0007] Furthermore, the keyboard may also include: the plurality of LED chips of different colors include: a blue LED chip converted into a white LED chip, a red LED chip, a green LED chip and a blue LED chip through a fluorescent glue dispensing process.

[0008] Furthermore, the above-mentioned keyboard may also include: the signal circuit layer is a structure formed by etching a metal film, including a keyboard signal horizontal axis input signal line, a keyboard signal horizontal axis output signal line, a keyboard signal horizontal axis trigger contact point, a keyboard signal vertical axis input signal line, a keyboard signal vertical axis input signal contact point, a keyboard signal vertical axis output signal contact point, a keyboard signal vertical axis output signal line, a spring switch fixed upper plate, a spring switch fixed lower plate, a single-line control light-emitting diode driver chip input signal line, a single-line control light-emitting diode driver chip output signal line, a light-emitting diode chip pad, a single-line return-to-zero code light-emitting diode driver control chip pad and a backlight keyboard main control chip pad.

[0009] Furthermore, the above-mentioned keyboard may also include: the spring switch is a structure of a metal sheet after stamping and forming; a spring switch also includes: a plurality of fixed contacts, a supporting part, a deformation part and a conductive contact point, wherein the plurality of fixed contacts are connected to the supporting part, the supporting part is a circular ring structure, the supporting part is connected to the deformation part, the deformation part is an elastic sheet structure, and the light-transmitting window of the light-transmitting window part is a window part stamped and formed between the supporting part and the deformation part during the processing of the spring switch, and the shape, number and position of the light-transmitting window part are adapted to the position, number and shape of the corresponding light-emitting diode chip.

[0010] Furthermore, the above-mentioned keyboard may also include: a plurality of fixed contacts of the spring switch are set as a first fixed contact, a second fixed contact, a third fixed contact and a fourth fixed contact, wherein the first fixed contact and the second fixed contact are set adjacent to the fourth fixed contact, the second fixed contact and the third fixed contact are set adjacent and are set adjacent to the first fixed contact, the third fixed contact and the fourth fixed contact are set adjacent and are set adjacent to the second fixed contact, and the fourth fixed contact and the first fixed contact are set adjacent and are set adjacent to the third fixed contact; wherein the setting angles and positional relationships of the first fixed contact, the second fixed contact, the third fixed contact and the fourth fixed contact are related to the routing settings of the signal circuit layer.

[0011] Furthermore, the above-mentioned keyboard may also include: the insulating unit is a membrane structure formed by punching or spraying of wear-resistant insulating material, the insulating unit includes multiple groups of openings, each group of openings includes: a first fixed contact opening, a second fixed contact opening, a third fixed contact opening, a fourth fixed contact opening and a horizontal axis trigger contact contact opening, wherein the positions of the first fixed contact opening, the second fixed contact opening, the third fixed contact opening and the fourth fixed contact opening are adapted to the positions of each fixed contact of a corresponding spring switch, and the shape and size of each fixed contact opening correspond to the shape and size of the corresponding fixed contact, and when the spring switch is pressed, the conductive contact point of the spring switch is in contact with the corresponding spring switch. The position of the horizontal axis trigger contact contact opening corresponds to the position of the keyboard signal horizontal axis trigger contact contact, the second fixed contact of the spring switch passes through the first fixed contact opening and is fixed on a corresponding keyboard signal vertical axis output signal contact contact, the third fixed contact passes through the second fixed contact opening and is fixed on a corresponding keyboard signal vertical axis input signal contact, the first fixed contact passes through the third fixed contact opening and is fixed on the spring switch fixed upper plate, the fourth fixed contact passes through the fourth fixed contact opening and is fixed on the spring switch fixed lower plate, and the conduction contact point passes through the corresponding horizontal axis trigger contact contact opening and is connected to the corresponding keyboard signal horizontal axis trigger contact contact.

[0012] Furthermore, the above-mentioned keyboard may also include: each light-emitting diode chip displays backlight through the light-transmitting window portion of a corresponding spring switch, specifically: the light-emitting diode chip emits light through the light-transmitting window portion of the corresponding spring switch, through the adhesive film, and displays backlight.

[0013] Furthermore, the above-mentioned keyboard may also include: in a single key circuit, after the keyboard signal horizontal axis input signal line is connected to the keyboard signal horizontal axis trigger contact contact between the keyboard signal vertical axis input signal contact contact and the keyboard signal vertical axis output signal contact contact, it becomes the keyboard signal horizontal axis output signal line, passes through the spring switch fixed upper plate and the spring switch fixed lower plate to enter the next key circuit, and becomes the keyboard signal horizontal axis input signal line of the next key circuit; the corresponding keyboard signal vertical axis input signal line of the single key circuit is connected to the keyboard signal vertical axis input signal contact contact, and the keyboard signal vertical axis output signal line is connected to the keyboard The signal vertical axis outputs the signal contact point, and the spring switch fixed upper plate and the spring switch fixed lower plate of the single key circuit are suspended on the signal circuit layer without electrical connection; the four light-emitting diode chip pads are located directly below the light-transmitting window portion of the corresponding spring switch; the single-line return-to-zero code light-emitting diode drive control chip pad is located on the outside of the spring switch with the corresponding keyboard signal vertical axis input signal contact point and the spring switch fixed lower plate as the border line; the single-line control light-emitting diode drive chip input signal line passes through the keyboard signal vertical axis output signal contact point and the keyboard signal vertical axis input signal contact point to enter the corresponding spring switch After the bottom, it passes through the keyboard signal longitudinal axis input signal contact point and the fixed lower plate of the spring switch and then goes around to the outside of the spring switch, connected to the single-line return-to-zero code light emitting diode drive control chip pad, and is electrically connected to the single-line return-to-zero code light emitting diode drive control chip die-bonded on the single-line return-to-zero code light emitting diode drive control chip pad; the single-line control light emitting diode drive chip input signal line becomes the single-line control light emitting diode drive chip output signal line after passing through the single-line return-to-zero code light emitting diode drive control chip pad, enters the next key circuit, and becomes the single-line control light emitting diode drive chip output signal line of the next key circuit. input signal line; the single-line return-to-zero code LED drive control chip pad is connected to the LED chip pad through the LED drive circuit; the backlight keyboard main control chip is welded on the signal circuit layer and is arranged at the lower left of the key circuit group, and the keyboard signal horizontal axis input signal line, the single-line control LED drive chip input signal line, and the keyboard signal vertical axis input signal line are all connected to the backlight keyboard main control chip; the blue light emitting diode chip is converted into a white light emitting diode core, a red light emitting diode chip, a green light emitting diode chip and a blue light emitting diode chip through a fluorescent glue dispensing process and is die-bonded on the LED chip pad.

[0014] Through the above scheme, the present application is applied, a single-layer circuit design is adopted, and the keyboard matrix circuit and RGB / RGB+W backlight circuit are integrated on a single-layer signal circuit layer through an innovative metal plate to reinforce the single-layer circuit design, thereby avoiding the problem of signal interleaving in traditional multi-layer circuits. The single-layer design not only simplifies the circuit structure and greatly reduces the material cost, but also reduces the thickness of the circuit board, improves the stability of circuit transmission and the signal response speed; and reduces the production cost. Due to the use of a single-layer circuit and a streamlined process flow, the patent greatly reduces the production complexity and cost. The simplified process reduces material consumption and shortens production time. Especially in large-scale production, it can even be produced by batch continuous printing of circuits to improve ESG indicators and effectively enhance the market competitiveness of the product. Fewer welding processes and simplified assembly processes also reduce the defective rate and rework costs; through the special spring switch design, the light-emitting diode can be placed directly below the key, and the backlight is transmitted through the light-transmitting window of the switch, solving the problem of uneven backlight in traditional designs. No additional light effect processing process is required, making the backlight effect more consistent and natural, improving the overall visual experience, and providing pure white light backlight in RGB+W applications. While providing pure white light, it can also greatly reduce the energy consumption problem of using the original RGB three-color mixing to produce white light. The use of a single-line controlled light-emitting diode driver chip allows the backlight system of the entire keyboard to be controlled by only one signal line, reducing the complexity of the circuit and saving circuit board space. This highly integrated design makes the product more compact and is conducive to the manufacture of lightweight equipment. Through the die bonding process of the light-emitting diode chip and the driver chip, the high integration of the light-emitting diode and the keyboard trigger mechanism is successfully achieved, which not only saves internal space, but also improves the integration and efficiency of the circuit. This process can accommodate the blue light-emitting diode chip to be converted into four light-emitting diodes of white light, red light, green light and blue light through the fluorescent glue dot process, further enhancing the visual effect of the RGB / RGB+W backlight keyboard, so that the present application has a wide range of application prospects and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 The figure shows a schematic diagram of the overall stacked structure of the key circuit of the present application;

[0017] Figure 2 Shown is a schematic diagram of the structure of multiple buttons of the present application;

[0018] Figure 3 Shown is a schematic diagram of a single button of the present application;

[0019] Figure 4 Shown is a schematic diagram of the pressing state of a single button of the present application;

[0020] Figure 5 This is a schematic diagram of the spring switch structure of the present application;

[0021] Figure 6 This is a schematic diagram of the structural change of the spring switch of the present application before and after being pressed. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0023] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1 The structural schematic diagram of the overall stacked structure of the key circuit of the present application is shown. A laptop computer keyboard of the present application that realizes keyboard backlight through a single-layer circuit board can include: a single-layer metal reinforcement plate 101, a signal circuit layer 3 with a keyboard matrix circuit and an RGB / RGB+W backlight circuit is arranged on the metal reinforcement plate 101, a backlight keyboard main control chip and multiple groups of light control units are arranged on the signal circuit layer 3, each group of light control units can include multiple light-emitting diode chips of different colors and a single-line return-to-zero code light-emitting diode drive control chip, an insulating unit 5 covers the signal circuit layer 3 and is bonded to the metal reinforcement plate, wherein multiple spring switches 2 are bonded to the insulating unit 5 through a bonding unit 6, the spring switch 2 is provided with a light-transmitting window portion, and multiple light-emitting diode chips corresponding to a spring switch 2 are arranged directly below the key, and each light-emitting diode chip displays backlight through the light-transmitting window portion of the corresponding spring switch 2.

[0025] The plurality of LED chips of different colors may include: a blue LED chip converted into a white LED chip, a red LED chip, a green LED chip and a blue LED chip by a fluorescent glue dispensing process. The present application can provide a pure white backlight in the RGB+W application, and can also significantly reduce the energy consumption problem of the original white light produced by mixing RGB three colors.

[0026] This application uses a metal reinforcement plate as support and shielding, and at the same time, by implementing the keyboard circuit and backlight circuit on a single-layer line signal circuit layer, the problem of line interlacing is avoided, making it possible to implement a keyboard matrix circuit and a large-scale backlight circuit on a single-layer line signal circuit layer. This design simplifies the complexity of the circuit and improves the overall reliability and cost-effectiveness. Through the special design of the spring switch, the spring switch is compatible with the key trigger and signal jumper functions, and the four light-emitting diodes (white light, red light, green light, and blue light) can be placed directly below the spring switch; it can also allow the backlight to pass smoothly through the window of the spring switch, solving the problem of uneven backlight in traditional designs. No additional light effect processing technology is required, making the backlight effect more consistent and natural, and improving the overall visual experience.

[0027] Figure 2 The present invention is a schematic diagram of the structure of multiple keys, wherein the signal circuit layer is formed on the metal reinforcement plate through processes including but not limited to copper coating, lamination and deposition, as the transmission of electrical signals; the light-emitting diode chip and the single-line return-to-zero code light-emitting diode drive control chip are fixed on the signal circuit layer through a solid crystal process (this method is mature and reliable, low cost, and convenient for large-scale production and manufacturing), and the backlight keyboard main control chip is fixed on the signal circuit layer through a welding process (this method is mature and reliable, low cost, and convenient for large-scale production and manufacturing), wherein the signal circuit layer is a structure formed by etching a metal film, which is the best implementation method of the present application (this method is mature and reliable, low cost, and convenient for large-scale production and manufacturing), and the signal line The circuit layer may include a keyboard signal horizontal axis input signal line 102, a keyboard signal horizontal axis output signal line 103, a keyboard signal horizontal axis trigger contact point 104, a keyboard signal vertical axis input signal line 105, a keyboard signal vertical axis input signal contact point 106, a keyboard signal vertical axis output signal contact point 107, a keyboard signal vertical axis output signal line 108, a spring switch fixed upper plate 109, a spring switch fixed lower plate 110, a single-line control light emitting diode driver chip input signal line 305, a single-line control light emitting diode driver chip output signal line 306, a light emitting diode chip pad, a single-line return-to-zero code light emitting diode driver control chip pad 307, and a backlight keyboard main control chip pad 33. Through the above configuration, the present application realizes the keyboard circuit and the backlight circuit on a single-layer circuit signal circuit layer, avoids the problem of circuit interlacing, and makes it possible to realize a keyboard matrix circuit and a large-scale backlight circuit on a single-layer circuit signal circuit layer. This design simplifies the complexity of the circuit and improves the overall reliability and cost-effectiveness. The use of single-line control LED driver chip means that the entire keyboard backlight system only needs one signal line to control, reducing the complexity of the circuit and saving circuit board space. This highly integrated design makes the product more compact and is conducive to the manufacture of lightweight equipment.

[0028] The spring switch is a structure of a metal sheet after stamping and forming; a spring switch may also include: a plurality of fixed contacts, a support portion, a deformation portion and a conductive contact point, wherein the plurality of fixed contacts are connected to the support portion, the support portion is a circular ring structure, the support portion is connected to the deformation portion, the deformation portion is an elastic sheet structure, and the light-transmitting window of the light-transmitting window portion is a window portion stamped and formed between the support portion and the deformation portion during the processing of the spring switch, and the shape, number and position of the light-transmitting window portion can be adapted to the position, number and shape of the corresponding light-emitting diode chip. A plurality of fixed contacts of the spring switch are arranged as a first fixed contact, a second fixed contact, a third fixed contact and a fourth fixed contact, wherein the first fixed contact and the second fixed contact are arranged adjacent to the fourth fixed contact, the second fixed contact and the third fixed contact are arranged adjacent to each other and are arranged adjacent to the first fixed contact, the third fixed contact and the fourth fixed contact are arranged adjacent to each other and are arranged adjacent to the second fixed contact, and the fourth fixed contact and the first fixed contact are arranged adjacent to each other and are arranged adjacent to the third fixed contact; wherein the setting angles and positional relationships of the first fixed contact, the second fixed contact, the third fixed contact and the fourth fixed contact are related to the routing setting of the signal circuit layer.

[0029] Specifically, Figure 3 A schematic diagram of a single button is shown. Figure 4 is a schematic diagram of the pressing state of a single button, where Figure 5The spring switch 2 can be formed by stamping a metal sheet with high elasticity, durability and conductivity (this method is mature and reliable, low cost and convenient for large-scale production). The spring switch 2 may include a spring switch A fixed contact 201, a spring switch B fixed contact 202, a spring switch C fixed contact 203, a spring switch D fixed contact 204, a spring switch support portion 205, a spring switch deformation portion 206, a spring switch light-transmitting window portion 207, and a spring switch conductive contact portion 208. Point 208; the spring switch conduction contact 208 is surface treated by electroplating process; the spring switch A fixed contact 201, the spring switch B fixed contact 202, the spring switch C fixed contact 203, and the spring switch D fixed contact 204 are stamped and connected to the spring switch support part 205; the spring switch support part 205 is annular and connected to the spring switch deformation part 206; the spring switch deformation part 206 is elastic sheet; the spring switch light-transmitting window part 207 is a light-transmitting window, which is a spring switch. The window portion is formed by stamping between the spring switch support portion 205 and the spring switch deformation portion 206 during the processing of the spring switch 2; the shape, number and position of the spring switch through the window portion 207 correspond to the position, number and shape of the light-emitting diode chip 113; the spring switch A fixed contact 201 and the spring switch B fixed contact are adjacent to the spring switch D fixed contact 204, the spring switch B fixed contact 202 and the spring switch C fixed contact 203 are adjacent to the spring switch A fixed contact 201 Adjacent, the fixed contact 203 of spring switch C and the fixed contact 204 of spring switch D are adjacent to the fixed contact 202 of spring switch B, the fixed contact 204 of spring switch D and the fixed contact 201 of spring switch A are adjacent to the fixed contact 203 of spring switch C; the setting angle and position relationship of the fixed contact 201 of spring switch A, the fixed contact 202 of spring switch B, the fixed contact 203 of spring switch C, and the fixed contact 204 of spring switch D depend on the wiring setting of the signal circuit layer. Through the above setting, the wiring is allowed to pass under the spring switch without causing structural interference, realizing the setting of jumper or bridge. Through the special spring switch design, the light-emitting diode can be placed directly under the key, and the backlight is transmitted through the light-transmitting window of the switch, which solves the problem of uneven backlight in traditional design. No additional light effect processing is required, making the backlight effect more consistent and natural, improving the overall visual experience. In RGB+W applications, pure white light backlight can be provided. While providing pure white light, it can also significantly reduce the energy consumption of the original use of RGB three-color mixing to produce white light.

[0030] The insulating unit may be a membrane structure formed by punching or spraying of a wear-resistant insulating material, and the insulating unit may include a plurality of groups of openings, each group of openings including: a first fixed contact opening, a second fixed contact opening, a third fixed contact opening, a fourth fixed contact opening, and a transverse axis trigger contact opening, wherein the positions of the first fixed contact opening, the second fixed contact opening, the third fixed contact opening, and the fourth fixed contact opening are adapted to the positions of each fixed contact of a corresponding spring switch, and the shape and size of each fixed contact opening correspond to the shape and size of the corresponding fixed contact, and when the spring switch is pressed, the conductive contact point of the spring switch is connected to the corresponding keyboard signal The horizontal axis trigger contact contacts are connected, and the position of the horizontal axis trigger contact contact opening corresponds to the position of the keyboard signal horizontal axis trigger contact contact. The second fixed contact of the spring switch passes through the first fixed contact opening and is fixed on a corresponding keyboard signal vertical axis output signal contact contact. The third fixed contact passes through the second fixed contact opening and is fixed on a corresponding keyboard signal vertical axis input signal contact contact. The first fixed contact passes through the third fixed contact opening and is fixed on the spring switch fixed upper plate. The fourth fixed contact passes through the fourth fixed contact opening and is fixed on the spring switch fixed lower plate. The conduction contact point passes through the corresponding horizontal axis trigger contact opening and is connected to the corresponding keyboard signal horizontal axis trigger contact contact.

[0031] Specifically, Figure 3 and Figure 4 As shown. Among them, Figure 1The insulating unit is an insulating film 5, which is punched or sprayed with a wear-resistant insulating material (this method is mature and reliable, low-cost, and easy to mass-produce), including an insulating film A fixed contact opening 501, an insulating film B fixed contact opening 502, an insulating film C fixed contact opening 503, an insulating film D fixed contact opening 504, and an insulating film horizontal axis trigger contact opening 505; the position of the insulating film A fixed contact opening 501 depends on the position of the spring switch A fixed contact 201, the position of the insulating film B fixed contact opening 502 depends on the position of the spring switch B fixed contact 202, the position of the insulating film C fixed contact opening 503 depends on the position of the spring switch C fixed contact 203, the position of the insulating film D fixed contact opening 504 depends on the position of the spring switch D fixed contact 204, and the position of the insulating film horizontal axis trigger contact opening 505 depends on the keyboard signal horizontal axis trigger contact opening 506. The position of the axis trigger contact 104; the fixed contact 202 of the spring switch B passes through the fixed contact opening 501 of the insulating film A and is fixed on the keyboard signal vertical axis output signal contact 107, the fixed contact 203 of the spring switch C passes through the fixed contact opening 502 of the insulating film B and is fixed on the keyboard signal vertical axis input signal contact 106, the fixed contact 201 of the spring switch A passes through the fixed contact opening 503 of the insulating film C and is fixed on the spring switch fixed upper plate 109, the fixed contact 204 of the spring switch D passes through the fixed contact opening 504 of the insulating film D and is fixed on the spring switch fixed lower plate 110, and the keyboard signal horizontal axis trigger contact 104 passes through the horizontal axis trigger contact opening 505 of the insulating film and can be connected with the keyboard signal horizontal axis trigger contact 104; each light emitting diode chip emits light, passes through the light-transmitting window portion 207 of the spring switch, and passes through the adhesive film to form a backlight effect of the keyboard. Through the above settings, the keyboard matrix circuit and RGB / RGB+W backlight circuit can be integrated on a single-layer signal circuit layer, avoiding the problem of signal interleaving in traditional multi-layer circuits. The single-layer design not only simplifies the circuit structure and greatly reduces the material cost, but also reduces the thickness of the circuit board and improves the stability of circuit transmission and signal response speed.

[0032] In a single key circuit, after the keyboard signal horizontal axis input signal line, the keyboard signal vertical axis input signal contact point and the keyboard signal vertical axis output signal contact point are connected to the keyboard signal horizontal axis trigger contact point, it becomes the keyboard signal horizontal axis output signal line, passes through the spring switch fixed upper plate and the spring switch fixed lower plate to enter the next key circuit, and becomes the keyboard signal horizontal axis input signal line of the next key circuit; the corresponding keyboard signal vertical axis input signal line of the single key circuit is connected to the keyboard signal vertical axis input signal contact point, and the keyboard signal vertical axis output signal line is connected to the keyboard signal vertical axis output signal contact point. The spring switch fixed upper plate and the spring switch fixed lower plate of the single key circuit are suspended on the signal circuit layer without electrical connection; the four light-emitting diode chip pads are located directly below the light-transmitting window portion of the corresponding spring switch; the single-line return-to-zero code light-emitting diode drive control chip pad is located on the outside of the spring switch with the corresponding keyboard signal longitudinal axis input signal contact point and the spring switch fixed lower plate as the border line; the single-line control light-emitting diode drive chip input signal line passes through the keyboard signal longitudinal axis output signal contact point and the keyboard signal longitudinal axis input signal contact point and enters the bottom of the corresponding spring switch, and then passes through the keyboard The signal vertical axis input signal contact point and the fixed lower plate of the spring switch are rewound to the outside of the spring switch, connected to the single-line return-to-zero code light emitting diode drive control chip pad, and electrically connected to the single-line return-to-zero code light emitting diode drive control chip die-bonded on the single-line return-to-zero code light emitting diode drive control chip pad; the single-line control light emitting diode drive chip input signal line becomes the single-line control light emitting diode drive chip output signal line after passing through the single-line return-to-zero code light emitting diode drive control chip pad, enters the next key circuit, and becomes the single-line control light emitting diode drive chip input signal line of the next key circuit The single-line return-to-zero code LED drive control chip pad is connected to the LED chip pad through the LED drive circuit; the backlight keyboard main control chip is welded on the signal circuit layer and is arranged at the lower left of the key circuit group, and the keyboard signal horizontal axis input signal line, the single-line control LED drive chip input signal line, and the keyboard signal vertical axis input signal line are all connected to the backlight keyboard main control chip; the blue light emitting diode chip is converted into a white light emitting diode chip, a red light emitting diode chip, a green light emitting diode chip and a blue light emitting diode chip through a fluorescent glue dot process and is solid-crystal-bonded on the LED chip pad.

[0033] Specifically, Figure 3 and Figure 4As shown, in a single key circuit, the keyboard signal horizontal axis input signal line 102 passes through the keyboard signal vertical axis input signal contact point 106 and the keyboard signal vertical axis output signal contact point 107 to be connected to the keyboard signal horizontal axis trigger contact point 104, and then becomes the keyboard signal horizontal axis output signal line 103, passes through the spring switch fixed upper plate 109 and the spring switch fixed lower plate 110 to enter the next key circuit, and becomes the keyboard signal horizontal axis input signal line 102 of the next key circuit; the keyboard signal vertical axis input signal line 105 is connected to the keyboard signal vertical axis input signal contact point 106; the keyboard signal vertical axis output signal line 108 is connected to the key The keyboard signal vertical axis output signal contact point 107; the spring switch fixed upper plate 109 and the spring switch fixed lower plate 110 are suspended on the signal circuit layer without electrical connection; the four LED chip pads are located directly below the light-transmitting window portion 207 of the spring switch; the single-line return-to-zero code LED drive control chip pad is located on the outside of the spring switch 2 with the keyboard signal vertical axis input signal contact point 106 and the spring switch fixed lower plate 110 as the border; the single-line control LED drive chip input signal line 305 passes through the keyboard signal vertical axis output signal contact point 107 and the keyboard signal vertical axis input signal contact point 106 and enters the bottom of the spring switch 2, The input signal line 305 passes through the keyboard signal longitudinal axis input signal contact point 106 and the spring switch fixed lower plate 110, and then goes around to the outside of the spring switch 2, and is connected to the single-line return-to-zero code light emitting diode drive control chip pad, and is electrically connected to the single-line return-to-zero code light emitting diode drive control chip 111 that is die-bonded on the single-line return-to-zero code light emitting diode drive control chip pad; the single-line control light emitting diode drive chip input signal line 305 becomes the single-line control light emitting diode drive chip output signal line 306 after passing through the single-line return-to-zero code light emitting diode drive control chip pad, and enters the next key circuit, and becomes the single-line control light emitting diode drive chip input signal line 306 of the next key circuit. Line 305; the single-line return-to-zero code LED drive control chip pad is connected to the LED chip pad through the LED drive line 112; the backlight keyboard main control chip is welded on the signal circuit layer 3, located at the lower left of the key circuit group, and the backlight keyboard main control chip is connected to the keyboard signal horizontal axis input signal line 102, the single-line control LED drive chip input signal line 305, and the keyboard signal vertical axis input signal line 301; the blue light LED chip is converted into a white light LED chip, a red light LED chip, a green light LED chip, and a blue light LED chip by a fluorescent glue dot process and solidified on the LED chip pad. Through the above settings, the use of the single-line control LED drive chip allows the entire keyboard backlight system to be controlled by only one signal line, reducing the complexity of the line and saving circuit board space.This highly integrated design makes the product more compact and is conducive to the manufacture of thin and light equipment; at the same time, through the die bonding process of the LED chip and the driver chip, the high integration of the LED and the keyboard trigger mechanism is successfully achieved, which not only saves internal space, but also improves the integration and efficiency of the circuit. This process can accommodate four LEDs of white light, red light, green light, and blue light, further enhancing the visual effect of the RGB / RGB+W backlit keyboard.

[0034] Figure 6 The schematic diagram is a structural change diagram of the spring switch before and after being pressed. In a method of realizing Per-Key RGB / RGB+W keyboard backlight and matrix keyboard through a single-layer circuit board, during operation, the backlight keyboard main control chip continuously sends characteristic signals to the keyboard signal vertical axis input signal line. When the spring switch is pressed, the deformation portion 206 is deformed, and the conductive contact point 208 is connected to the keyboard signal vertical axis input signal contact point. The characteristic signal sent by the keyboard signal vertical axis input signal line passes through the keyboard signal vertical axis input signal contact point connected to the fixed contact of the spring switch B to the conductive contact point 208 of the conductive spring switch, and then is transmitted back to the backlight keyboard main control chip through the keyboard signal horizontal input signal line connected to the conductive contact point 208. The backlight keyboard main control chip recognizes the key trigger action according to the received characteristic signal; when the spring switch is not pressed, the characteristic signal of the keyboard signal vertical axis input signal line passes from the keyboard signal vertical axis input signal contact point to the conductive contact point 208 of the conductive spring switch. The input signal contact point to the keyboard signal vertical axis output signal contact point is transmitted to the next key circuit, waiting for the next key trigger action; the single-line control light emitting diode driver chip input signal line transmits the return-to-zero code signal to the single-line return-to-zero code light emitting diode driver control chip to realize the backlight effect of the entire keyboard controlled by a signal bus; wherein the backlight keyboard main control chip is arranged in a reciprocating order according to the arrangement sequence of the keyboard signal vertical axis input signal line, the single-line control light emitting diode driver chip input signal line and the keyboard signal horizontal axis input signal line, thereby ensuring that the keyboard circuit and the RGB / RGB+W backlight circuit are realized in a single signal line layer without the occurrence of line interlacing.

[0035] Compared with the existing technology, the significant advantages of this application are not only reflected in the innovation of technology, but also have a profound impact on production costs, user experience and the simplicity of overall design. The following is a detailed description of these advantages:

[0036] First, single-layer circuit design: Through the innovative metal plate reinforced single-layer circuit design, the keyboard matrix circuit and RGB / RGB+W backlight circuit are integrated on a single-layer signal circuit layer, avoiding the problem of signal interleaving in traditional multi-layer circuits. The single-layer design not only simplifies the circuit structure and greatly reduces the material cost, but also reduces the thickness of the circuit board and improves the stability of circuit transmission and signal response speed.

[0037] Second, the production cost is reduced: Due to the use of single-layer circuits and streamlined process flow, the patent significantly reduces production complexity and cost. The simplified process reduces material consumption and shortens production time. Especially in large-scale production, it can even use batch continuous printing circuits to improve ESG indicators and effectively enhance the market competitiveness of products. Fewer welding steps and simplified assembly processes also reduce defective rates and rework costs.

[0038] Third, backlight effect optimization: through the special spring switch design, the light-emitting diode can be placed directly under the button, and the backlight is transmitted through the light-transmitting window of the switch, solving the problem of uneven backlight in traditional design. No additional light effect processing is required, making the backlight effect more consistent and natural, improving the overall visual experience, and providing pure white backlight in RGB+W applications. While providing pure white light, it can also greatly reduce the energy consumption of the original use of RGB three-color mixing to produce white light.

[0039] Fourth, compact structure and space saving: the use of single-line control LED driver chip means that the entire keyboard backlight system only needs one signal line for control, reducing the complexity of the circuit and saving circuit board space. This highly integrated design makes the product more compact and is conducive to the manufacture of lightweight equipment.

[0040] Fifth, high integration of backlight and keys: Through the die bonding process of LED chips and driver chips, the high integration of LEDs and keyboard trigger mechanisms has been successfully achieved, which not only saves internal space, but also improves the integration and efficiency of the circuit. This process can accommodate four LEDs of white light, red light, green light, and blue light, further enhancing the visual effect of RGB / RGB+W backlit keyboards.

[0041] In the present application, each preferred scheme only focuses on describing the differences from other preferred schemes. As long as the preferred schemes do not conflict, they can be combined arbitrarily. The embodiments formed by the combination are also within the scope disclosed in this specification. Considering the simplicity of the text, this article will no longer separately describe the embodiments formed by the combination.

[0042] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

[0043] In this document, each preferred scheme only focuses on describing the differences from other preferred schemes. As long as the preferred schemes do not conflict, they can be combined arbitrarily. The embodiments formed by the combination are also within the scope disclosed in this specification. Considering the simplicity of the text, this document will no longer separately describe the embodiments formed by the combination.

[0044] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A laptop keyboard with keyboard backlighting realized by a single-layer circuit board, characterized in that: include: A single-layer metal reinforcement plate, a signal circuit layer with a keyboard matrix circuit and an RGB / RGB+W backlight circuit is arranged on the metal reinforcement plate, a backlight keyboard main control chip and multiple groups of light control units are arranged on the signal circuit layer, each group of light control units includes multiple light-emitting diode chips of different colors and a single-line return-to-zero code light-emitting diode drive control chip, an insulating unit covers the signal circuit layer and is bonded to the metal reinforcement plate, wherein multiple spring switches are bonded to the insulating film through the bonding unit, the spring switch is provided with a light-transmitting window portion, and multiple light-emitting diode chips corresponding to a spring switch are arranged directly below the key, and each light-emitting diode chip displays backlight through the light-transmitting window portion of the corresponding spring switch.

2. The laptop keyboard according to claim 1, characterized in that: The plurality of light emitting diode chips of different colors include: a blue light emitting diode chip converted into a white light emitting diode chip, a red light emitting diode chip, a green light emitting diode chip and a blue light emitting diode chip through a fluorescent glue dispensing process.

3. The laptop keyboard according to claim 2, characterized in that: It also includes: the signal circuit layer is a structure formed by etching a metal film, including a keyboard signal horizontal axis input signal line, a keyboard signal horizontal axis output signal line, a keyboard signal horizontal axis trigger contact point, a keyboard signal vertical axis input signal line, a keyboard signal vertical axis input signal contact point, a keyboard signal vertical axis output signal contact point, a keyboard signal vertical axis output signal line, a spring switch fixed upper plate, a spring switch fixed lower plate, a single-line control light-emitting diode driver chip input signal line, a single-line control light-emitting diode driver chip output signal line, a light-emitting diode chip pad, a single-line return-to-zero code light-emitting diode drive control chip pad and a backlight keyboard main control chip pad.

4. The laptop keyboard according to claim 3, characterized in that: Also includes: The spring switch is a structure of a metal sheet after stamping and forming; a spring switch also includes: a plurality of fixed contacts, a support portion, a deformation portion and a conductive contact point, wherein the plurality of fixed contacts are connected to the support portion, the support portion is a circular ring structure, the support portion is connected to the deformation portion, the deformation portion is an elastic sheet structure, the light-transmitting window of the light-transmitting window portion is a window portion stamped and formed between the support portion and the deformation portion during the processing of the spring switch, and the shape, number and position of the light-transmitting window portion are adapted to the position, number and shape of the corresponding light-emitting diode chip.

5. The laptop keyboard according to claim 4, characterized in that: Also includes: A plurality of fixed contacts of the spring switch are arranged as a first fixed contact, a second fixed contact, a third fixed contact and a fourth fixed contact, wherein the first fixed contact and the second fixed contact are arranged adjacent to the fourth fixed contact, the second fixed contact and the third fixed contact are arranged adjacent to each other and are arranged adjacent to the first fixed contact, the third fixed contact and the fourth fixed contact are arranged adjacent to each other and are arranged adjacent to the second fixed contact, and the fourth fixed contact and the first fixed contact are arranged adjacent to each other and are arranged adjacent to the third fixed contact; wherein the setting angles and positional relationships of the first fixed contact, the second fixed contact, the third fixed contact and the fourth fixed contact are related to the routing setting of the signal circuit layer.

6. The laptop keyboard according to claim 5, characterized in that: It also includes: the insulating unit is a membrane structure formed by punching or spraying of wear-resistant insulating material, the insulating unit includes multiple groups of openings, each group of openings includes: a first fixed contact opening, a second fixed contact opening, a third fixed contact opening, a fourth fixed contact opening and a horizontal axis trigger contact contact opening, wherein the positions of the first fixed contact opening, the second fixed contact opening, the third fixed contact opening and the fourth fixed contact opening are adapted to the positions of each fixed contact of a corresponding spring switch, and the shape and size of each fixed contact opening correspond to the shape and size of the corresponding fixed contact, and when the spring switch is pressed, the conductive contact point of the spring switch is in contact with the corresponding keyboard signal The position of the horizontal axis trigger contact contact opening corresponds to the position of the keyboard signal horizontal axis trigger contact contact; the second fixed contact of the spring switch passes through the first fixed contact opening and is fixed on a corresponding keyboard signal vertical axis output signal contact contact; the third fixed contact passes through the second fixed contact opening and is fixed on a corresponding keyboard signal vertical axis input signal contact contact; the first fixed contact passes through the third fixed contact opening and is fixed on the spring switch fixed upper plate; the fourth fixed contact passes through the fourth fixed contact opening and is fixed on the spring switch fixed lower plate; the conduction contact point passes through the corresponding horizontal axis trigger contact contact opening and is connected to the corresponding keyboard signal horizontal axis trigger contact contact.

7. The laptop keyboard according to claim 6, characterized in that: Each light emitting diode chip displays backlight through a corresponding light-transmitting window portion of a spring switch. Specifically, the light emitting diode chip emits light through the light-transmitting window portion of the corresponding spring switch and through the adhesive film to display backlight.

8. The laptop keyboard according to claim 7, characterized in that: The invention further comprises: in a single key circuit, after the keyboard signal horizontal axis input signal line, the keyboard signal vertical axis input signal contact point and the keyboard signal vertical axis output signal contact point are connected to the keyboard signal horizontal axis trigger contact point, the line becomes the keyboard signal horizontal axis output signal line, passes through the spring switch fixed upper plate and the spring switch fixed lower plate to enter the next key circuit, and becomes the keyboard signal horizontal axis input signal line of the next key circuit; the corresponding keyboard signal vertical axis input signal line of the single key circuit is connected to the keyboard signal vertical axis input signal contact point, the keyboard signal vertical axis output signal line is connected to the keyboard signal vertical axis output signal contact point, the spring switch fixed upper plate and the spring switch fixed lower plate of the single key circuit are suspended on the signal circuit layer without electrical connection; the four light emitting diode chip pads are located directly below the light-transmitting window portion of the corresponding spring switch; the single-line return-to-zero code light emitting diode drive control chip pad is located on the outside of the spring switch with the corresponding keyboard signal vertical axis input signal contact point and the spring switch fixed lower plate as the border line; the single-line control light emitting diode drive chip input signal line passes through the keyboard signal vertical axis output signal contact point After entering the bottom of the corresponding spring switch between the signal contact point and the keyboard signal vertical axis input signal contact point, it passes through the keyboard signal vertical axis input signal contact point and the fixed lower plate of the spring switch and goes around to the outside of the spring switch again, and is connected to the single-line return-to-zero code light emitting diode drive control chip pad, and is electrically connected to the single-line return-to-zero code light emitting diode drive control chip that is solid-crystal on the single-line return-to-zero code light emitting diode drive control chip pad; the single-line control light emitting diode drive chip input signal line becomes the single-line control light emitting diode drive chip output signal line after passing through the single-line return-to-zero code light emitting diode drive control chip pad, enters the next key circuit, and becomes the single-line control light emitting diode drive chip input signal line of the next key circuit; the single-line return-to-zero code light emitting diode drive control chip pad is connected to the light emitting diode chip pad through the light emitting diode drive circuit; the backlight keyboard main control chip is welded on the signal circuit layer and is arranged at the lower left of the key circuit group, and the keyboard signal horizontal axis input signal line, the single-line control light emitting diode drive chip input signal line, and the keyboard signal vertical axis input signal line are all connected to the backlight keyboard main control chip; The blue light emitting diode chip is converted into a white light emitting diode core, a red light emitting diode chip, a green light emitting diode chip and a blue light emitting diode chip by a fluorescent glue dispensing process and then solid-chipped on the light emitting diode chip pad.

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