Key core device with sound-triggered light-emitting control function and keyboard

Abstract

The application relates to the technical field of key core devices, and provides a key core device with a sound-triggered light-emitting control function and a keyboard. The key core device comprises an input module, a light-emitting module, a sound sensing module and a control circuit, wherein the sound sensing module is used for sensing sound waves generated in the process of key operation to generate a sensing signal, and the control circuit dynamically adjusts the brightness or light-emitting rhythm of LED light sources according to the intensity of the signal. Each LED light source comprises a plurality of light-emitting chips with different wavelengths, and a multi-color light-emitting effect can be realized. At least one key core device is installed in the keyboard body and is controlled by a central control unit, and can be subjected to partition light-emitting adjustment according to the input intensity of different areas. The application can enhance user operation feedback, improve the interactivity and visual performance of the keyboard, and is suitable for intelligent input equipment such as mechanical keyboards and game keyboards.

Description

Technical Field

[0001] This invention relates to the field of keyboard core device technology, and in particular to a keyboard core device and keyboard with sound-triggered light-emitting control function. Background Technology

[0002] As the trend towards more user-friendly design in electronic products continues to strengthen, keyboards, as one of the core components of human-computer interaction, are no longer limited to traditional input functions. Instead, they are gradually integrating diverse functions such as visual feedback, ambient lighting effects, and interactive experiences. Currently, most keyboards on the market use backlight modules with preset lighting effects to achieve basic brightness adjustment or color switching, commonly found in gaming keyboards or high-end laptops.

[0003] However, most existing keyboard backlighting control methods are based on fixed programs or manual settings, which cannot create real-time linkage with the user's actual input behavior and lack dynamic interactivity. For example, although some products support key area-sensitive triggering backlighting, most rely on static time control or hotkey settings, which cannot respond to the user's typing rhythm or operation intensity in real time. This results in the lighting effects being disconnected from actual operation during use, lacking immersion and personalized experience. Summary of the Invention

[0004] The purpose of this invention is to provide a key core device and keyboard with sound-triggered light-emitting control function, so as to solve the problem that the existing keyboard light-emitting control method lacks real-time performance and interactivity, and improve the user's operating experience and the keyboard's personalized expression capabilities.

[0005] To achieve the above objectives, the present invention proposes a key core device with sound-triggered light emission control function, comprising:

[0006] The input module has multiple physical buttons for receiving user input;

[0007] A light-emitting module is disposed below or around the input module. The light-emitting module includes at least one LED light source, and each LED light source contains a light-emitting chip of at least one wavelength for producing light-emitting effects of multiple colors.

[0008] The sound sensing module is located inside the key core device and is used to sense the sound waves generated by the physical keys during operation to generate a sensing signal;

[0009] The control circuit is electrically connected to the light-emitting module and the sound sensing module respectively, and is used to dynamically adjust the brightness or light-emitting rhythm of the LED light source according to the intensity of the sensing signal.

[0010] Furthermore, the control circuit includes an analog-to-digital converter, which is used to convert the sensing signal output by the sound sensing module into a digital signal, and the control circuit analyzes and processes the digital signal to dynamically adjust the brightness or emission rhythm of the LED light source.

[0011] The control circuit also includes a volume threshold judgment module, used whereby, if the intensity of the sensed signal is higher than the first threshold than the second threshold, the brightness of the LED light source is increased; if the intensity of the sensed signal is lower than the second threshold, the brightness of the LED light source is decreased or turned off; and if the intensity of the sensed signal is between the first and second thresholds, the current brightness state of the LED light source is maintained. Upon initial triggering, the initial brightness of the LED light source is a preset value. This achieves the control of increasing, decreasing, or turning off the brightness of the LED light source.

[0012] In addition, the control circuit can also adjust the flashing frequency of the LED light source in real time according to the rhythm frequency of the sensed sound waves, so that the light emission effect is synchronized with the typing rhythm and the visual interactivity is enhanced.

[0013] Rhythm frequency refers to the frequency signal converted from the number of key presses per unit time.

[0014] The flashing frequency and the rhythm frequency are synchronously related (including proportional relationship, mapping relationship or following relationship).

[0015] In a preferred embodiment, the input module adopts a mechanical key structure, and the sound sensing module is disposed in the keyboard base of the input module to facilitate direct sensing of the sound waves generated by striking the physical keys when operating the physical keys.

[0016] The sound sensing module may include multiple sensing elements, which are distributed in different areas of the keyboard base to achieve regional input perception and zoned light emission response.

[0017] To support personalized functions, the control circuit is also connected to a memory that can store user-defined light control parameters and strategies, enabling customized configuration.

[0018] The present invention also provides a keyboard, which includes at least one key core device as described above, each key core device being installed in the keyboard body, and the brightness or rhythm of each key core device being controlled by a central control unit.

[0019] The central control unit is configured to receive user input via a graphical user interface to set the overall keyboard's backlight mode, color style, and trigger sensitivity parameters. Furthermore, the central control unit also supports zone backlight control, allowing adjustment of LED brightness or color in different areas based on typing volume, resulting in richer visual response and a more interactive user experience. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] in:

[0022] Figure 1 This is a schematic diagram of the key core device with sound-triggered light emission control function according to an embodiment of the present invention;

[0023] Figure 2 This is a perspective view of a key core device with sound-triggered light emission control function according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of a keyboard including the key core device with sound-triggered light-emitting control function as described in the embodiments of the present invention;

[0025] Figure 4 This is a schematic diagram of the graphical user interface of the keyboard according to an embodiment of the present invention.

[0026] Explanation of main component symbols

[0027] Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please refer to Figure 1 The diagram shows a schematic of a key core device 100 with sound-triggered light emission control function. The key core device 100 mainly includes: an input module 110, a light emission module 120, a sound sensing module 130, and a control circuit 140.

[0030] Please refer to further details. Figure 2 The input module 110 has multiple physical buttons 111 for receiving user input, including text, symbols, or function commands. In one embodiment, each physical button 111 may correspond to one or more of the light-emitting modules 120. The physical buttons 111 can be pressed vertically to drive the control circuit 140 to recognize and generate signals to adjust the LED light source. Specifically, the physical buttons 111 may include keycaps, scissor-switch or guide pillar structures, elastic elements (such as silicone caps), and base structures. Their arrangement can be a standard QWERTY keyboard configuration (KOLIT keyboard, full keyboard) or can be adjusted according to different user needs. Furthermore, the input module 110 may be a mechanical button structure with multiple independent rebound mechanisms and stable guiding structures for the physical buttons 111 to improve the tactile feedback and input accuracy.

[0031] In this embodiment, the light-emitting module 120 is disposed below or around the input module 110 to provide a light-emitting or backlighting effect. The term "around" refers to the light-transmitting area on the side wall of the keycap or the light guide groove on the edge of the printed circuit board. The light-emitting module 120 includes at least one LED light source 121, and each LED light source 121 contains at least one light-emitting chip of a specific wavelength. Preferably, each light-emitting chip can emit light of different wavelengths, thereby achieving multiple color lighting effects. By controlling the driving timing and brightness output of the light-emitting chips of different wavelengths, visual effects such as dynamic color changing, gradient, or rhythmic flashing are presented, further enhancing the human-computer interaction experience and the personalized performance of the product. The light-emitting chips can be selected from combinations of red, green, and blue light, and can also be further adjusted with phosphors to achieve a composite configuration with purple or warm white light, suitable for visual feedback needs in various scenarios.

[0032] The sound sensing module 130 is disposed inside the key core device 100 and is used to sense the sound waves generated by the physical key 111 during operation to generate a sensing signal. Preferably, the sound sensing module 130 can be configured in the keyboard base 150 of the input module 110, and the sound sensing module 130 is embedded near the physical key 111 or near the support structure of the physical key 111, so as to effectively receive the sound waves generated by key presses and convert them into sensing signals, thereby improving the sensitivity and accuracy of sound wave acquisition during the operation of the physical key 111. In detail, the sound sensing module 130 can use components such as a capacitive microphone, a piezoelectric sensor, or a MEMS (microelectromechanical system) microphone, which can receive the sound waves generated by the user when pressing the physical key 111 in real time and output the corresponding analog signal, which is used as the sensing signal. The receiving end of the sound sensing module 130 receives the sound waves, and the signal output end of the sound sensing module 130 outputs the sensing signal to the control circuit 140. Here, sound waves refer to air pressure fluctuations caused by physical button operations. Sound signals refer to analog / digital signals. Through a pre-set sensitivity threshold, the sound sensing module 130 can effectively filter out ambient background noise and only respond when the user operates the physical button 111, thereby improving the triggering accuracy of the illumination control. Furthermore, as... Figure 2 As shown, the sound sensing module 130 may further include multiple sensing elements 131, which are distributed in different areas of the keyboard base 150, such as the left, middle, and right sides, preferably in a uniform distribution to enhance the ability to distinguish the sound source or improve the overall signal-to-noise ratio. Each sensing element 131 may be a miniature electret microphone, a piezoelectric ceramic sheet, or a MEMS acoustic sensor, used to detect acoustic fluctuations generated by key presses and convert them into analog signals (i.e., sensing signals). Through the distributed sensing configuration of the sensing elements 131, not only can the intensity of key presses be determined, but the input position or the rhythm of the user's keystrokes can also be further analyzed, thereby providing the LED light source 121 with a more interactive light-emitting control strategy, such as local highlighting, regional gradient, or rhythmic synchronized light emission effects, enhancing the human-computer interaction experience.

[0033] The control circuit 140 constitutes a dedicated control unit for the key core device and is integrated into a printed circuit board (PCB).

[0034] The control circuit 140 is electrically connected to both the light-emitting module 120 and the sound-sensing module 130, and is used to dynamically adjust the brightness or rhythm of the LED light source 121 according to the intensity of the sensed signal. For example, when the sensed signal detected by the sound-sensing module 130 is weak, the control circuit 140 controls the LED light source 121 to remain constantly lit at low brightness or to flash at a slow rhythm; while when the signal intensity detected by the sound-sensing module 130 increases, the control circuit 140 can increase the brightness of the LED light source 121, or change its flashing frequency, rhythm, and color change, so that the LED light source 121 changes synchronously with the rhythm of the user's keyboard typing. Therefore, a more immersive and interactive lighting effect can be achieved, enhancing the keyboard's operational feedback and visual experience, and also meeting the personalized lighting effect needs of different scenarios such as e-sports, audio-visual, or office work. In one embodiment, the control circuit 140 may include an analog-to-digital converter (ADC) for converting the analog signal output by the sound sensing module 130 into a digital signal as the sensing signal. This digital signal is then analyzed and processed by subsequent programs in the control circuit 140 to dynamically adjust the brightness or frequency of the LED light source. The control circuit 140 includes a microcontroller unit (MCU). The ADC may be an integrated module built into the MCU or a separately configured external chip, capable of sampling the sensing signal in real time at a preset sampling rate and generating corresponding digital signal data. Upon receiving the digital signal, the control circuit 140 can use a built-in algorithm module to analyze the amplitude, frequency, or waveform characteristics of the digital signal to determine whether the digital signal originates from a user's tapping action and further evaluate the force or frequency of the tap on the physical button 111. For example, a higher signal strength may represent a heavier tap, allowing the control circuit 140 to increase the brightness or increase the flashing frequency accordingly, and vice versa. The application of the analog-to-digital converter improves the system's processing accuracy and response speed for analog signals, contributing to a more sensitive and interactive light emission control effect. Optionally, the force or rhythm of striking the physical button 111 is used to consult a corresponding table, and the LED light source 121 is controlled according to the retrieved brightness or flashing frequency. The corresponding table describes the relationship between numerical values ​​or ranges and brightness or flashing frequency, where the numerical value represents the force or rhythm, and the range represents the range of force or rhythm. For example, in the corresponding table, a force value of 50-100 corresponds to a brightness level L=150-255.

[0035] In one embodiment, the control circuit 140 includes a volume threshold judgment module for determining whether the signal intensity meets the light emission condition based on the sensing signal collected by the sound sensing module 130, wherein a first threshold (T1) is greater than a second threshold (T2). When the intensity of the sensing signal is higher than the first threshold (T1), the brightness of the LED light source 121 is increased; when the intensity of the sensing signal is lower than the second threshold (T2), the brightness of the LED light source 121 is decreased or turned off. More specifically, the volume threshold judgment module can preset at least two threshold parameters, wherein the first threshold (T1) corresponds to triggering brightness enhancement, and the second threshold (T2) corresponds to triggering brightness reduction or extinguishing, wherein the first threshold (T1) is higher than the second threshold (T2), thus forming a dynamic adjustment mechanism with hysteresis characteristics.

[0036] Specifically, taking voltage values ​​to represent the strength of the sensing signal as an example, when the strength of the input signal (i.e., the sensing signal) is higher than a preset first threshold (T1) (e.g., 1.5V), the control circuit 140 controls the LED light source 121 to enter a high-brightness state or increase its brightness. For example, the control circuit 140 increases the pulse width modulation (PWM) duty cycle of the LED light source 121 driving signal, thereby increasing the conduction time of the LED light source 121 per unit time, thus increasing the light output intensity (i.e., increasing brightness). When the input signal strength is lower than a second threshold (T2) (e.g., 0.8V), the control circuit 140 controls the LED light source 121 to reduce its brightness, or turns off the LED light source 121 when it falls below the minimum brightness setting value. If the signal strength of the input signal is between the first threshold (T1) and the second threshold (T2), the LED light source 121 maintains its current brightness level. In this embodiment, the first threshold (T1) and the second threshold (T2) can be preset to fixed values, or they can be dynamically adjusted by the user or the control system based on background noise. During the keyboard power-on initialization phase, the control circuit 140 collects 200ms of ambient acoustic data through the sound sensing module 130 and obtains a noise baseline value through moving average filtering. During device operation, when no key presses are detected for one second and the signal fluctuation standard deviation is <0.05V, the noise baseline value is updated according to the formula N_new=0.8*N_old+0.2*S_t (S_t is the current ambient sampling value), where N_old is the current noise baseline value and N_new is the updated noise baseline value. In a specific embodiment, the "dynamic adjustment" can be dynamically corrected based on the background noise baseline value, for example: T1=N+Δ1, T2=N+Δ2, where N is the noise baseline value, and Δ1 and Δ2 are preset offsets used to ensure accurate identification of the sound information of keystrokes even under noise interference. The following is an example of data settings used to implement this brightness control logic:

[0037]

[0038] In detail, the LED brightness level (L) is a dimensionless step value from 0 to 255, which can be further corresponding to the duty cycle controlled by PWM. When L=0, it means that the duty cycle is 0% and when L=255, it means that the duty cycle is 100%. The other values ​​correspond to different brightness levels proportionally.

[0039] To improve response sensitivity, the control circuit 140 can use a sliding window or multi-cycle averaging method to filter the input signal, and control the LED brightness based on the following logic:

[0040] When the input signal is greater than or equal to the first threshold (T1), the LED light source 121 is turned on and its brightness increases according to a linear mapping function, which can be: L=[(V_signal-T2) / (T1-T2)]×L_max, where V_signal is the signal voltage; L_max is the maximum brightness level. Additional parameter descriptions: K is the brightness scaling factor, with a default value of 1.0, which can be adjusted by the user; the sampling time interval updates the average signal strength every 100ms to avoid instantaneous noise interference.

[0041] When the input signal is less than or equal to the second threshold (T2), the LED light source 121 reduces its brightness or turns off;

[0042] When the input signal is between the first threshold (T1) and the second threshold (T2), the LED light source 121 maintains its current brightness state. It is understood that the input signal can be the first threshold, the second threshold, or a value between the first and second thresholds.

[0043] Furthermore, to enhance the user experience, the control circuit 140 can also map the signal strength to multiple brightness levels, for example, 5 levels (20%, 40%, 60%, 80%, 100%) or 10 levels, improving situational adaptability. Therefore, the volume threshold judgment mechanism described in this embodiment can effectively combine environmental acoustic changes to dynamically adjust the luminous intensity of the LED light source 121, enabling the key device 100 to have active response capability in dark environments, improving visibility and interactivity. In addition, the volume threshold judgment module can also combine a time window and a multiple sampling averaging mechanism to improve the accuracy and stability of the judgment, preventing false responses of the light source due to brief noise or false triggering, thereby achieving a more intelligent and user-friendly luminous adjustment control effect. For example, when combining the time window and the multiple sampling averaging mechanism for comprehensive judgment, the control circuit 140 can continuously collect the sensing signal of the sound sensing module 130 within a preset time window (e.g., 10ms, 20ms, or 50ms). The length of the preset time window can be set according to different application scenarios. A shorter time results in a faster response speed, while a longer time provides stronger anti-interference capabilities. Alternatively, within the preset time window, the control circuit 140 performs a weighted average or moving average processing on the intensity of the sensed signals from multiple sampling points to obtain a representative average sound intensity. This average value is used for comparison with a first threshold (T1) or a second threshold (T2), thereby avoiding misjudgment due to sudden noise at individual sampling points.

[0044] When the average value is continuously higher than the first threshold (T1) for a certain number of sampling times, it is determined to be "valid triggering", thereby executing the instruction to increase the brightness of the LED light source 121.

[0045] When the average value remains below the second threshold (T2) for a certain number of sampling times, it is determined to be "effectively eliminated", thereby executing the instruction to reduce or turn off the LED light source 121.

[0046] If the average value is between the first threshold (T1) and the second threshold (T2), the current brightness remains unchanged.

[0047] In addition, the control circuit 140 can be connected to a memory 160 for storing user-defined lighting control parameters and strategies. Specifically, the lighting control parameters may include lighting brightness level, lighting color, lighting mode (e.g., constant light, breathing, rhythm synchronization, etc.), and on / off time interval; the lighting control strategy may include lighting effect switching logic for different usage scenarios, such as automatic switching based on operation volume, time period, application type (e.g., game, typing, office), or user-selected configuration files. Users can set a lower brightness and cool-toned lighting strategy in night mode, and a higher brightness and colored lighting effect in day mode; they can also automatically trigger a dynamic lighting mode based on operation intensity (e.g., continuous rapid keystrokes). When the sensing signal detected by the sound sensing module 130 meets specified conditions, the control circuit 140 calls and executes the lighting control parameters and strategies. The control circuit 140 can write the above-mentioned setting data into the memory 160 and automatically load the corresponding parameters each time the keyboard is powered on or woken up, thereby realizing personalized and contextualized lighting control functions. The memory 160 can also be configured to have a power-off save function to ensure that the parameters set by the user are not lost due to power failure, thereby further improving the continuity of user experience and the level of device intelligence.

[0048] It is understood that the memory 160 uses EEPROM (Electrically Erasable Programmable Read Only Memory), which has the function of saving data when power is off.

[0049] Please refer to Figure 3 The diagram shows a schematic of a keyboard 10 including the key core device 100. The keyboard 10 includes at least one key core device 100, each key core device 100 is installed in the keyboard body, and the brightness or rhythm of each key core device 100 is controlled by a central control unit 170. In this embodiment, each key core device 100 has an independent light-emitting module 120, and the light-emitting module 120 is electrically connected to the central control unit 170. The central control unit 170 can be a microcontroller (MCU), a digital signal processor (DSP), or a dedicated control chip with lighting effect driving capability. The central control unit 170 is used to uniformly manage the driving signals and control logic of the light-emitting module 120 in each key core device 100.

[0050] Preferably, the central control unit 170 is configured to receive user input via a graphical user interface 180 for setting the backlight mode, color style, and trigger sensitivity parameters of the keyboard 10. Specifically, the central control unit 170 may include a display to show the graphical user interface 180. That is, as... Figure 4 As shown, users can set or customize parameters according to usage scenarios, such as adjustable lighting modes, color styles, and trigger sensitivity, to synchronously or regionally adjust the lighting state of each key core device 100, thereby achieving diverse lighting effects such as wave-like sweeping light, rhythmic flashing, and localized highlighting. Simultaneously, the central control unit 170 can be configured with a zoning strategy, and the control circuit 140 of each key core device 100 independently performs real-time adjustments based on locally sensed signals. Based on the physical zones of the keyboard, each zone is equipped with an independent sensing element. The central control unit 170 supports zoned lighting control, adjusting the brightness or color of the light source according to the sensing signal intensity of different zones. Therefore, the central control unit 170 can also adjust the lighting response behavior of each key core device 100 in real time according to the user's current input state, operation intensity, or volume input from the sound sensing module 130, enhancing the user's immersion and human-computer interaction experience. If the user sets the mode to partitioned mode, the central control unit 170 can also control the lighting strategy of different functional areas (e.g., main key area, arrow key area, number area) through a lookup table mechanism or address mapping method to achieve regional lighting effect arrangement.

[0051] The central control unit 170 communicates with the host via the USB / HID protocol, calls the host display device to generate a graphical user interface 180, and transmits the received user configuration parameters to the keyboard control circuit 140 via a serial bus.

[0052] The strength of the sensed signal is the signal strength of the sensed signal.

[0053] Optionally, the central control unit 170 calculates the brightness allocation weights using a regional signal strength matrix. The element values ​​in the regional signal strength matrix are signal strengths.

[0054] The central control unit 170 divides the keyboard into a grid area of ​​m rows and n columns, with at least one sensing element configured in each area. Using a sampling period of 100ms, the average signal intensity of the sound signal corresponding to the sound wave in each area is collected to construct an original matrix. After moving average filtering and column normalization, noise data below the activation threshold is removed to obtain the final intensity matrix, which is then used as the area signal intensity matrix.

[0055] The total intensity is obtained by summing the intensities of all non-zero regions. The base luminance ratio of each region is then calculated; for example, the luminance ratio of region A = intensity of region A / total intensity. The final weight of a region = base luminance ratio × region priority coefficient. The region priority coefficient is a pre-set priority coefficient for each region. Based on the range to which the final weight of a region belongs, a pre-stored luminance level table is matched, driving the corresponding region's LED light source to perform brightness / color changes. The luminance level table describes the correspondence between weight ranges and luminance levels.

[0056] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A key core device with sound-triggered light-emitting control function, characterized in that, include: The input module has multiple physical buttons for receiving user input, and the input module has a mechanical button structure. A light-emitting module is disposed below or around the input module. The light-emitting module includes at least one LED light source, and each LED light source contains a light-emitting chip of at least one wavelength. A sound sensing module, disposed inside the key core device, is used to sense the sound waves generated by the physical keys during operation to generate a sensing signal. The sound sensing module is configured in the keyboard base of the input module, and is embedded near the bottom of the physical keys or near the support structure of the physical keys, so as to effectively receive the sound waves generated by key presses and convert them into sensing signals. The sound waves refer to the air pressure fluctuations caused by the operation of the physical keys. The sound sensing module also includes multiple sensing elements distributed in different areas of the keyboard base. The sound sensing module can effectively filter out ambient background noise through a preset sensitivity threshold, and only respond when the user operates the physical keys. A control circuit, electrically connected to both the light-emitting module and the sound-sensing module, is used to dynamically adjust the brightness or rhythm of the LED light source based on the sensing signal. The control circuit adjusts the flashing frequency of the LED light source according to the rhythm frequency of the sensed signal, ensuring that the flashing frequency is synchronously correlated with the rhythm frequency. The control circuit includes an analog-to-digital converter (ADC) for converting the sensing signal output from the sound-sensing module into a digital signal. The control circuit then analyzes and processes the digital signal to dynamically adjust the brightness or rhythm of the LED light source. Upon receiving the digital signal, the control circuit can use a built-in algorithm module to analyze the amplitude, frequency, or waveform characteristics of the digital signal to determine whether the digital signal originates from a user tap. The control circuit receives a sensing signal and further evaluates the force or rhythm of pressing the physical button. Based on this, the control circuit can increase the brightness of the light source or increase the flashing frequency, and vice versa. The control circuit includes a volume threshold judgment module, where the first threshold is greater than the second threshold. When the intensity of the sensing signal is higher than the first threshold, the brightness of the LED light source is increased; when the intensity of the sensing signal is lower than the second threshold, the brightness of the LED light source is decreased or turned off; when the intensity of the sensing signal is between the first threshold and the second threshold, the current brightness state of the LED light source is maintained. Upon initial triggering, the initial brightness of the LED light source is a preset value, and the first threshold (T1) and the second threshold (T2) are preset to fixed values ​​or dynamically adjusted according to background noise.

2. The key core device with sound-triggered light emission control function according to claim 1, characterized in that, The control circuit is also connected to a memory for storing user-defined light emission control parameters and strategies. When the sensing signal detected by the sound sensing module meets the specified conditions, the control circuit calls and executes the light emission control parameters and strategies.

3. A keyboard, characterized in that, It includes a central control unit, a keyboard body, and at least one key core device with sound-triggered light-emitting control function as described in any one of claims 1 to 2, wherein each key core device is installed in the keyboard body and the central control unit controls the light-emitting brightness or rhythm of each key core device.

4. The keyboard according to claim 3, characterized in that, The central control unit is configured to receive user input via a graphical user interface for setting the keyboard's backlighting mode, color style, and trigger sensitivity parameters.

5. The keyboard according to claim 3, characterized in that, The central control unit supports zoned illumination control, adjusting the brightness or color of the light emission based on the sensing signal intensity of different areas.

Images