An RTC clock display system with Bluetooth time correction

Abstract

The utility model discloses a RTC clock display system with bluetooth time correction, through bluetooth module and mobile phone end establish two -way wireless connection, has realized the time calibration function of convenient, and user only needs the mobile phone connection bluetooth, will automatically broadcast the current time, can automatically update the time information of clock, avoided traditional button input troublesome and easy misoperation problem, also overcame WIFI regulation and the defect of high power consumption of network environment interference, besides, the clock system of the utility model still has the intelligent brightness adjustment function, and the brightness adjustment module can real -time collection ambient light intensity, and according to the light intensity size calculates corresponding electric signal transmission to main control module, and main control module again automatically adjusts the brightness of LED clock display module according to the preset brightness threshold value, so that clock can keep good display effect under different light environment, clear and not dazzling, greatly improved user experience.

Description

Technical Field

[0001] This utility model relates to the field of clock display technology, and in particular to an RTC clock display system with Bluetooth time synchronization. Background Technology

[0002] With the advancement of technology, various products are gradually becoming intelligent, continuously improving people's living standards and bringing them convenience. LED clocks, as a widely used electronic product today, have the function of displaying accurate time and date information. However, in practical use, people have found some problems with traditional LED clocks, such as inconvenient clock calibration and the inability to automatically adjust display brightness according to ambient light.

[0003] Currently, time display adjustment on LED clocks is generally achieved through mobile phone Wi-Fi connection or button input. Button input is not only cumbersome and prone to accidental operation, while Wi-Fi adjustment is greatly affected by network interference and has high power consumption. Furthermore, the display brightness of traditional LED clocks is usually fixed or can only be changed manually, unable to automatically adjust according to ambient light intensity. This causes inconvenience in different lighting environments; for example, the display brightness may be insufficient in bright light, while it may be too glaring in dim light. Therefore, a more reasonable LED clock display system is urgently needed to solve the above-mentioned problems. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned technologies, such as the inconvenience and instability of LED clock time adjustment and the inability to adjust the brightness of LED clock according to the environment, this utility model provides an RTC clock display system with Bluetooth time synchronization.

[0005] To achieve the above objectives, this utility model provides an RTC clock display system with Bluetooth time synchronization, comprising:

[0006] RTC clock module, including an RTC clock chip for real-time timing to provide accurate time information;

[0007] The Bluetooth module is used to establish a two-way wireless connection between the main control module and the mobile phone to transmit data information from the mobile phone to the main control module.

[0008] The brightness adjustment module collects the ambient light intensity, calculates the corresponding electrical signal based on the ambient light intensity, and transmits it to the main control module.

[0009] An LED clock display module is used to display time information and the display brightness can be adjusted.

[0010] The main control module acquires the time information of the RTC clock module and the ambient light intensity of the brightness adjustment module, and adjusts the display content of the LED clock display module according to a preset brightness threshold based on the RTC clock module and the brightness adjustment module.

[0011] The power module converts 12V voltage to 5V voltage to provide 5V input voltage for the RTC clock module, Bluetooth module, brightness adjustment module and main control module.

[0012] As an improvement of this utility model, the main control module includes a main control chip, the power supply module includes a step-down chip, the Bluetooth module includes a Bluetooth chip, the brightness adjustment module includes a photoresistor, and the LED clock display module includes several LED lights.

[0013] As an improvement of this utility model, the power supply module includes a first Schottky diode, a first filter capacitor, and a second filter capacitor. The anode of the first Schottky diode is connected to a 12V voltage, and the cathode is coupled to the first voltage input pin and the second voltage input pin of the step-down chip, one end of the first filter capacitor, and one end of the second filter capacitor. The other end of the first filter capacitor and the other end of the second filter capacitor are grounded.

[0014] As an improvement of this utility model, the first crystal oscillator pin and the second crystal oscillator pin of the RTC clock chip are respectively connected to the two ends of a 32768Hz quartz crystal resonator; the first data transmission pin and the second data transmission pin of the RTC clock chip are connected to the main control chip; the first data control pin and the second data control pin of the main control chip; the main control chip receives the time information sent by the Bluetooth module and sends it to the RTC clock chip through the first data transmission pin and the second data transmission pin to update and adjust the timing reference and operating parameters inside the RTC clock chip.

[0015] As an improvement of this utility model, one end of the photoresistor is connected to a 5V voltage, and the other end is coupled to the light adjustment pin of the main control chip together with one end of the first resistor. The other end of the first resistor is grounded. The photoresistor detects the ambient light intensity and converts it into a voltage value that matches the magnitude of the ambient light intensity. The main control chip collects the voltage value through the light adjustment pin.

[0016] As an improvement of this utility model, the Bluetooth module includes a Bluetooth chip, and the main control chip is coupled to the third and fourth communication pins of the Bluetooth chip through a first communication pin and a second communication pin to communicate with the Bluetooth chip; the voltage input pin of the Bluetooth chip receives the 5V voltage input by the power module.

[0017] As an improvement of this utility model, the positive terminal of the LED lamp is coupled to the drive signal pin of the main control chip, and the negative terminal of the LED lamp is coupled to the adjustment signal pin of the main control chip. The main control chip compares the voltage value sent by the brightness adjustment module with a preset brightness threshold, and combines the time and date information sent by the RTC clock circuit to adjust the brightness of each LED lamp.

[0018] As an improvement of this utility model, the main control chip is CA51F155S6A, the Bluetooth chip is AB5607E, the step-down chip is OC5820, and the RTC clock chip is PCF8563T / 5,518.

[0019] The beneficial effects of this utility model are as follows: Compared with the prior art, the RTC clock display system with Bluetooth time synchronization provided by this utility model establishes a two-way wireless connection with the mobile phone through the Bluetooth module, realizing a convenient time calibration function. Users only need to send commands through the mobile phone to easily update the clock's time information, avoiding the problems of cumbersome and accidental operation of traditional button input, and also overcoming the shortcomings of WIFI adjustment being affected by network environment interference and high power consumption. In addition, the clock system of this utility model also has an intelligent brightness adjustment function. The brightness adjustment module can collect the ambient light intensity in real time and calculate the corresponding electrical signal according to the light intensity, which is transmitted to the main control module. The main control module then automatically adjusts the brightness of the LED clock display module according to the preset brightness threshold, so that the clock can maintain a good display effect in different lighting environments, which is both clear and not dazzling, greatly improving the user experience. Attached Figure Description

[0020] Figure 1 This is the circuit diagram of the main control chip of this utility model;

[0021] Figure 2 This is a circuit diagram of the RTC clock module of this utility model;

[0022] Figure 3 This is the circuit diagram of the Bluetooth module of this utility model;

[0023] Figure 4 This is a circuit diagram of the brightness adjustment module of this utility model;

[0024] Figure 5 The circuit diagram of the power module of this utility model is shown below.

[0025] Figure 6 This is a circuit diagram of the LED clock display module of this utility model. Detailed Implementation

[0026] To more clearly illustrate this utility model, the following description, in conjunction with the accompanying drawings, will provide a further picture.

[0027] In the following description, specific examples are given to provide a more in-depth understanding of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of them. It should be understood that the specific embodiments described are only used to explain the present invention and are not intended to limit the present invention.

[0028] It should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the said feature, integral, step, operation, element, or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, or combinations thereof.

[0029] Please see Figure 1 The present invention relates to an RTC clock display system with Bluetooth time synchronization, comprising:

[0030] RTC clock module, including RTC clock chip U5 for real-time timing to provide accurate time information;

[0031] The Bluetooth module is used to establish a two-way wireless connection between the main control module and the mobile phone to transmit data information from the mobile phone to the main control module.

[0032] The brightness adjustment module collects the ambient light intensity, calculates the corresponding electrical signal based on the ambient light intensity, and transmits it to the main control module.

[0033] An LED clock display module is used to display time information and the display brightness can be adjusted.

[0034] The main control module acquires the time information of the RTC clock module and the ambient light intensity of the brightness adjustment module, and adjusts the display content of the LED clock display module according to a preset brightness threshold based on the RTC clock module and the brightness adjustment module.

[0035] The power module converts 12V voltage to 5V voltage to provide 5V input voltage for the RTC clock module, Bluetooth module, brightness adjustment module and main control module.

[0036] The RTC clock circuit of this invention mainly updates its internal timekeeping based on the time information sent by the main control module. The Bluetooth module and the mobile phone are connected bidirectionally and wirelessly. The mobile phone encrypts and packages the time, date, and other information before sending it to the Bluetooth module. The Bluetooth module receives the data packet, verifies its integrity, and after successful verification, decrypts it and sends the data to the main control chip U1. The main control chip U1 then parses the data to generate corresponding time synchronization and configuration commands. The time synchronization commands are sent to the RTC clock module. The RTC clock chip U5 receives the time synchronization commands, updates its internal timing reference and operating parameters, and generates the actual time information. Simultaneously, the brightness adjustment module collects ambient light intensity in real time, converts it into a matching voltage value, and transmits it to the main control module. The main control module then generates a brightness adjustment command based on the voltage value. Combined with the time information, the LED clock display module displays the corresponding time. Furthermore, the main control module can automatically calibrate the time calculated by the RTC clock chip U5 daily via the Bluetooth module, saving users the time calibration step.

[0037] In this embodiment, the main control module includes a main control chip U1, the power supply module includes a step-down chip U3, the Bluetooth module includes a Bluetooth chip U4, the brightness adjustment module includes a photoresistor R20, and the LED clock display module includes several LED lights.

[0038] In this embodiment, the power module includes a step-down chip U3, a first Schottky diode, and a filter capacitor, all coupled together. The anode of the first Schottky diode is connected to an external voltage of 12V-24V, and the cathode is coupled to the first voltage input pin, the second voltage input pin, and one end of the first and second filter capacitors of the step-down chip U3. The other ends of the first and second filter capacitors are grounded. Before receiving the 12V external voltage, the step-down chip U3 of the power module undergoes initial voltage regulation through the Schottky diode to prevent reverse connection of the input power voltage. After receiving a stable voltage, the step-down chip U3 reduces the 12V voltage to 5V and outputs it. Similarly, before the 5V voltage is output, the second Schottky diode, the third filter capacitor, and the fourth filter capacitor work together to further stabilize the voltage. Finally, the 5V voltage value is output to the RTC clock module, Bluetooth module, brightness adjustment module, and main control module to complete the power supply output.

[0039] In this embodiment, the first and second crystal oscillator pins of the RTC clock chip U5 are respectively connected to the two ends of a 32768Hz quartz crystal resonator; the first and second data transmission pins of the RTC clock chip U5 are connected to the main control chip U1, and the first and second data control pins of the main control chip U1 are also connected. The main control chip U1 receives time information sent by the Bluetooth module and sends it to the RTC clock chip U5 through the first and second data transmission pins to update and adjust the timing reference and operating parameters inside the RTC clock chip U5; wherein, the RTC clock chip U5 mainly receives the time calibration command and configuration command sent by the main control chip U1 through the first and second data transmission pins to update the internal timing reference and operating parameters, generate actual time information, and then send the regenerated time information to the main control chip U1.

[0040] In this embodiment, one end of the photoresistor R20 is connected to a 5V voltage, and the other end, together with one end of the first resistor, is coupled to the light adjustment pin of the main control chip U1. The other end of the first resistor is grounded. The photoresistor R20 detects the ambient light intensity and converts it into a voltage value that matches the ambient light intensity. The main control chip U1 converts the ambient light intensity of the photoresistor R20 into a voltage value through an ADC conversion module and receives the voltage value through the light adjustment pin. Due to the characteristics of the photoresistor R20, it can collect and absorb ambient light and change its resistance value according to the change in ambient light intensity, thereby changing the current in the circuit. When the ambient light intensity increases, the resistance value of the photoresistor R20 decreases, the current in the circuit increases, and the voltage value received by the light adjustment pin of the main control chip U1 increases; conversely, when the ambient light intensity decreases, the resistance value of the photoresistor R20 decreases, and the current in the circuit increases, causing the voltage value received by the light adjustment pin of the main control chip U1 to increase; conversely, when the ambient light intensity decreases, the resistance value of the photoresistor R20 decreases, and the current in the circuit increases, causing the voltage value received by the light adjustment pin of the main control chip U1 to increase. Increasing the resistance of resistor R20 reduces the current in the circuit, causing a decrease in the voltage received by the light adjustment pin of the main control chip U1. The main control chip U1 compares the collected voltage value with a preset brightness threshold, automatically adjusting the brightness of the LED clock display module to adapt to different ambient light intensities. Furthermore, the main control chip U1 combines this with time information fed back from the RTC clock chip U5. For example, by setting different brightness thresholds at specific time points, the LED clock display module can maintain its lowest brightness between 9:00 PM and 6:00 AM. Through the brightness adjustment module and the RTC clock chip U5, the LED clock display module displays time information that corresponds to the ambient light level, effectively ensuring the clarity and readability of the clock display, improving its practicality, and providing a more comfortable user experience.

[0041] In this embodiment, the Bluetooth module includes a Bluetooth chip U4. The main control chip U1 is coupled to the Bluetooth chip U4 via a first communication pin and a second communication pin, and to the third and fourth communication pins for communication. The voltage input pin of the Bluetooth chip U4 receives the 5V voltage input from the power module to ensure the normal operation of the Bluetooth module. As one of the core components of the clock system, the Bluetooth chip U4 is mainly responsible for receiving and sending wireless signals to achieve two-way communication with the mobile phone. The mobile phone can send time calibration commands and other configuration information to the main control chip U1 through the Bluetooth module. After receiving and processing this information, the main control chip U1 sends it to the RTC clock chip U5 or to adjust the brightness of the LED clock display module, thereby achieving accurate clock display and intelligent brightness adjustment. The clock system of this invention can also be set to automatically obtain the broadcast time from the mobile phone and automatically send it to the RTC clock chip for time calibration every day to ensure that the time displayed by the clock system is accurate.

[0042] In this embodiment, the positive terminal of the LED lamp is coupled to the drive signal pin of the main control chip U1, and the negative terminal of the LED lamp is coupled to the adjustment signal pin of the main control chip U1. The main control chip U1 compares the voltage value sent by the brightness adjustment module with a preset brightness threshold, and combines the time and date information sent by the RTC clock circuit to adjust the brightness of each LED lamp. The drive signal pin mainly controls the content displayed by the LED lamp and controls the segment selection signal of the LED display. By controlling the signals of the drive signal pin and the adjustment signal pin, dynamic scanning of multi-digit LED displays can be achieved. The adjustment signal pin is used to adjust the LED lights to display different numbers and characters. It controls the digit selection signal of the multi-digit LED display. The function of the adjustment signal pin is to select the digit to be displayed, that is, which LED display unit should be lit or turned off to achieve brightness adjustment. In the specific implementation, the main control chip U1 will determine the current ambient light intensity based on the voltage value provided by the brightness adjustment module, and send the corresponding brightness adjustment signal to the LED lights through the adjustment signal pin according to the preset brightness threshold, thereby dynamically adjusting the brightness of the LED clock display module to adapt to different lighting environments.

[0043] In practical implementation, the main control chip U1 is model CA51F155S6A, which integrates rich peripheral interfaces and powerful data processing capabilities. It can efficiently process data from the Bluetooth module, RTC clock chip U5, and brightness adjustment module, and generate corresponding control commands according to preset algorithms to realize automatic adjustment of the brightness of the LED clock display module and accurate display of time information. The Bluetooth chip U4 is model AB5607E, which supports Bluetooth Low Energy technology, which can minimize system power consumption and extend device usage time while ensuring communication quality. A stable communication connection between Bluetooth chip U4 and main control chip U1 ensures accurate transmission of time information and configuration commands. Buck converter U3 (OC5820) features high efficiency and stable output voltage, converting 12V-24V input voltage to 5V for reliable power supply to the RTC clock module, Bluetooth module, brightness adjustment module, and main control module. RTC clock chip U5 (PCF8563T / 5,518) integrates a high-precision oscillator and timing circuitry, providing accurate date and time information. RTC clock chip U5 connects to main control chip U1 via a data transmission pin, receiving time synchronization and configuration commands from U1 to update internal timing references and operating parameters, ensuring accurate clock display.

[0044] The advantages of this utility model are:

[0045] 1. This utility model establishes a two-way wireless connection with a mobile phone via a Bluetooth module, enabling remote calibration and configuration of the clock. Users can easily complete the calibration and settings of the clock simply by operating on their mobile phones, greatly improving the convenience of using the clock.

[0046] 2. The brightness adjustment module of this utility model can collect the ambient light intensity in real time and automatically adjust the brightness of the LED clock display module according to the ambient light intensity, ensuring that the clock can maintain a clear display effect in different lighting environments, while avoiding discomfort to the user's eyes caused by excessively strong or weak light, thus improving the comfort and practicality of the clock.

[0047] The above-disclosed embodiments are only a few specific examples of this utility model. However, this utility model is not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. An RTC clock display system with Bluetooth time synchronization, characterized in that, include: RTC clock module, including an RTC clock chip for real-time timing to provide accurate time information; The Bluetooth module is used to establish a two-way wireless connection between the main control module and the mobile phone to transmit commands from the mobile phone to the main control module. The brightness adjustment module collects the ambient light intensity, calculates the corresponding electrical signal based on the ambient light intensity, and transmits it to the main control module. An LED clock display module is used to display time information and the display brightness can be adjusted. The main control module acquires the time information of the RTC clock module and the ambient light intensity of the brightness adjustment module, and adjusts the display content of the LED clock display module according to a preset brightness threshold based on the RTC clock module and the brightness adjustment module. The power module converts 12V voltage to 5V voltage to provide 5V input voltage for the RTC clock module, Bluetooth module, brightness adjustment module and main control module.

2. The RTC clock display system with Bluetooth time synchronization according to claim 1, characterized in that, The main control module includes a main control chip, the power supply module includes a step-down chip, the Bluetooth module includes a Bluetooth chip, the brightness adjustment module includes a photoresistor, and the LED clock display module includes several LED lights.

3. The RTC clock display system with Bluetooth time synchronization according to claim 2, characterized in that, The power module includes a first Schottky diode, a first filter capacitor, and a second filter capacitor. The anode of the first Schottky diode is connected to a 12V voltage, and the cathode is coupled to the first voltage input pin and the second voltage input pin of the step-down chip, one end of the first filter capacitor, and one end of the second filter capacitor. The other ends of the first filter capacitor and the other ends of the second filter capacitor are grounded.

4. The RTC clock display system with Bluetooth time synchronization according to claim 2, characterized in that, The first and second crystal oscillator pins of the RTC clock chip are respectively connected to the two ends of a 32768Hz quartz crystal resonator; the first and second data transmission pins of the RTC clock chip are connected to the main control chip; the first and second data control pins of the main control chip are used to receive time information sent by the Bluetooth module and send it to the RTC clock chip through the first and second data transmission pins to update and adjust the timing reference and operating parameters inside the RTC clock chip.

5. The RTC clock display system with Bluetooth time synchronization according to claim 2, characterized in that, One end of the photoresistor is connected to a 5V voltage, and the other end is coupled to the light adjustment pin of the main control chip along with one end of the first resistor. The other end of the first resistor is grounded. The photoresistor detects the ambient light intensity and converts it into a voltage value that matches the ambient light intensity. The main control chip collects the voltage value through the light adjustment pin.

6. The RTC clock display system with Bluetooth time synchronization according to claim 2, characterized in that, The Bluetooth module includes a Bluetooth chip. The main control chip is coupled to the Bluetooth chip via a first communication pin and a second communication pin, and a third communication pin and a fourth communication pin, to communicate with the Bluetooth chip. The voltage input pin of the Bluetooth chip receives the 5V voltage input from the power module.

7. The RTC clock display system with Bluetooth time synchronization according to claim 2, characterized in that, The positive terminal of the LED lamp is coupled to the drive signal pin of the main control chip, and the negative terminal of the LED lamp is coupled to the adjustment signal pin of the main control chip. The main control chip compares the voltage value sent by the brightness adjustment module with a preset brightness threshold, and combines the time and date information sent by the RTC clock module to adjust the brightness of each LED lamp.

8. The RTC clock display system with Bluetooth time synchronization according to claim 2, characterized in that, The main control chip is CA51F155S6A, the Bluetooth chip is AB5607E, the step-down chip is OC5820, and the RTC clock chip is PCF8563T / 5,518.

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