DVD circuit device with adjustable eye protection mode

Abstract

The utility model discloses a DVD circuit device with an adjustable eye protection mode. The DVD circuit device comprises a power supply input module, a filtering module, a current adjustment master control module, a display control module and a protection module. In the DVD circuit device, the power supply input module is connected with the filtering module to provide a stable power supply for a subsequent circuit, and the filtered voltage is accessed to the core voltage conversion and current regulation module. The module interacts with the display control module according to feedback and adjustment functions of a chip, receives eye protection parameters set by a user according to environment and preference, realizes accurate adjustment of eye protection current, and further regulates and controls display brightness and color temperature. Meanwhile, the protection module is connected with the core voltage conversion and current regulation module, the output voltage is monitored, and protection is carried out in time when abnormity such as overvoltage occurs. The whole circuit is simple in design, elements are conventional and easy to integrate, existing equipment can be upgraded with low cost, reliability is effectively improved, service life is prolonged, and user trust is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of DVD circuit technology and relates to a DVD circuit device with an adjustable eye protection mode. Background Technology

[0002] As people pay increasing attention to visual health, the eye-protection function of DVD devices is receiving more and more attention. Traditional DVD eye-protection modes usually control the display brightness and color temperature by setting a fixed current intensity in advance, thereby reducing some of the blue light emitted by the screen.

[0003] However, this fixed current intensity setting has significant limitations, failing to meet the diverse display needs of different users in different usage scenarios (such as different lighting environments and different times of day). For example, in dimly lit indoor environments, users may need lower brightness and a warmer color temperature for a comfortable viewing experience, while in well-lit environments, they may need to appropriately increase the brightness to ensure clear visibility. Furthermore, even the same user may have different preferences for display brightness and color temperature during the day and at night. Therefore, there is an urgent need for a DVD circuit device that enables adjustable current intensity in eye-protection mode to provide a more user-friendly, comfortable display effect that effectively protects the user's eyes. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A DVD circuit device with an adjustable eye protection mode includes:

[0006] Power input module for receiving external DVD 5V power input;

[0007] The filtering module, whose input terminal is connected to the power input module, is used to filter the input voltage and output BL5V voltage;

[0008] The current regulation main control module includes chip U2. The IN pin of chip U2 is connected to the BL5V voltage output by the filter module, the CE pin is connected to the signal used to control the chip enable, the LX pin is used to connect to an inductor to realize voltage conversion, the OVP pin is used for overvoltage protection detection, and the FB pin is used to connect to a feedback resistor to realize voltage feedback regulation. The current regulation main control module is used to convert the input voltage into the output voltage AVDD and adjust the output current according to the external control signal.

[0009] The display control module receives AVDD and control signals output by the current regulation main control module, and has a user interface for sending current regulation commands to the current regulation main control module according to the eye protection parameters set by the user through the user interface, so as to control the display brightness and color temperature.

[0010] The protection module is used for overvoltage protection when the output voltage AVDD exceeds the set value.

[0011] As a further embodiment of this utility model, the chip U2 is an SS6635 model.

[0012] As a further embodiment of this utility model: the filtering module includes an inductor L11, a ferrite bead FB, a capacitor C25, and a capacitor BC26. One end of the inductor L11 is connected to the output terminal of the power input module, and the other end is connected to one end of the ferrite bead FB. The other end of the ferrite bead FB is connected to one end of the capacitor C25 and one end of the capacitor BC26. The other ends of the capacitor C25 and the other ends of the capacitor BC26 are grounded. The inductor L11 is a surface mount inductor with an inductance of 10uH-22uH and a rated current of 2A-3A.

[0013] As a further embodiment of this utility model: the magnetic bead FB is model FB0603-600R or FB0805-1000R, the capacitor C25 is an electrolytic capacitor with a capacitance of 10uF-22uF and a withstand voltage of 16V-25V, and the capacitor BC26 is a ceramic capacitor with a capacitance of 0.1uF-0.22uF and a withstand voltage of 50V.

[0014] As a further embodiment of this utility model: the current regulation main control module further includes an inductor L2, a diode D2, and a resistor R27. One end of the inductor L2 is connected to the LX pin of the chip U2, and the other end is connected to the anode of the diode D2. One end of the resistor R27 is connected to the FB pin of the chip U2, and the other end is connected to the output terminal. The inductor L2 is a power inductor with an inductance of 10uH-22uH, a DC resistance of 0.08Ω-0.1Ω, and a rated current of 3A-4A.

[0015] As a further embodiment of this utility model: the diode D2 is a Schottky diode with a forward voltage drop of 0.35V-0.4V, a reverse withstand voltage of 40V-50V, and a maximum forward current of 3A-4A; the resistor R27 is a metal film resistor with a resistance of 1KΩ, an accuracy of 0.5%-1%, and a power of 0.25W-0.5W.

[0016] As a further embodiment of this utility model: the protection module includes a Zener diode D4, whose cathode is connected to the cathode of diode D2 and one end of capacitor C6, and whose anode is grounded. The Zener diode D4 has a Zener voltage of 12V and a power of 1W-1.5W.

[0017] As a further aspect of this utility model: the display driver chip in the display control module has high-precision current control capability and rich display control interfaces, and can achieve precise control of display brightness and color temperature according to the received current adjustment command.

[0018] The beneficial effects of this invention are: It achieves adjustable current for eye protection mode and meets personalized needs: The DVD circuit device of this invention, through the collaboration of the display control module and the current regulation main control module, enables adjustable current intensity for eye protection. Users can freely set eye protection parameters according to the usage environment (light intensity, etc.) and personal preferences (brightness, color temperature sensitivity) to obtain a comfortable experience. Compared with traditional eye protection modes, it is more tailored to needs, effectively reducing eye fatigue and damage, and providing a user-friendly eye protection function.

[0019] Precise current control optimizes display performance: Utilizing the voltage feedback and internal current regulation function of chip U2, combined with the precise control of the display control module, the output current is precisely adjusted, thereby accurately controlling display brightness and color temperature. This effectively reduces blue light for eye protection while ensuring clear images and accurate colors, avoiding problems caused by improper current adjustment, improving overall display quality, and providing users with a high-quality visual experience.

[0020] The circuit structure is simple and easy to integrate: the circuit device has a reasonable and simple structural design, clear functions for each module, and readily available and standard components, making implementation and integration easy. This helps reduce costs and improve efficiency, facilitates upgrades and retrofits of existing DVD equipment, and allows manufacturers to apply it without making significant changes to the circuitry, quickly improving product performance and competitiveness, and demonstrating good market prospects.

[0021] Enhanced protection features improve system reliability: An overvoltage protection module and a Zener diode D4 monitor and clamp the output voltage in real time to prevent component damage and improve circuit reliability and stability. The display and control module also monitors chip temperature, module current, and other operating statuses, providing timely protection in case of abnormalities, reducing failure rates and maintenance costs, extending service life, and enhancing user trust and satisfaction. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the module structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the circuit structure of this utility model. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. It should be understood that this application is not limited to the exemplary embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0028] Please see Figures 1-2 In this embodiment of the present invention, a DVD circuit device with an adjustable eye protection mode includes:

[0029] Power Input Module 1: Employs a standard power interface to ensure a stable connection to an external power source. Its internal conductive material is a highly conductive metal alloy, and the contact parts undergo special surface treatment to enhance electrical contact performance and effectively reduce contact resistance, thereby reliably receiving external DVD 5V power.

[0030] Filter module 2: Composed of inductor L11, ferrite bead FB, capacitor C25, and capacitor BC26. Inductor L11 is a surface-mount inductor with an inductance of 15uH and a rated current of 2.5A.

[0031] The FB ferrite bead has the model number FB0603-600R or FB0805-1000R. Its internal structure is specially designed to generate a large impedance to high-frequency interference signals, thereby effectively suppressing high-frequency interference.

[0032] Capacitor C25 is an electrolytic capacitor with a capacitance of 15uF and a withstand voltage of 20V. Its electrodes are made of high-purity metal foil, and the electrolyte has undergone strict screening and treatment to ensure the capacitor's large capacity characteristics and stable voltage filtering capability.

[0033] The BC26 capacitor is a ceramic capacitor with a capacitance of 0.15uF and a voltage rating of 50V. Its ceramic dielectric has excellent high-frequency characteristics, enabling rapid charging and discharging, and effectively helping to filter out high-frequency noise.

[0034] In the circuit structure connection, one end of inductor L11 is connected to the output terminal of power input module 1, and the other end is connected to ferrite bead FB. Ferrite bead FB is then connected to capacitors C25 and BC26, which are grounded. After a complex electromagnetic coupling and filtering process, a stable BL5V voltage is output.

[0035] Current regulation main control module 3: The core chip U2 is the SS6635, which integrates advanced voltage conversion and current regulation circuits.

[0036] The U2IN pin of the chip is connected to the BL5V voltage output from filter module 2 via a low-impedance wire, ensuring a stable power input. The CE pin connects to the enable signal of an external control chip; this signal line uses a shielded wire to prevent external interference from affecting the chip's enable control. The LX pin connects to inductor L2, a power inductor with an inductance of 15uH, a DC resistance of 0.09Ω, and a rated current of 3.5A. Its winding coil uses high-purity copper wire, and the magnetic core uses high-performance ferrite material, ensuring efficient energy storage and release during voltage conversion. The OVP pin connects to a dedicated voltage detection circuit for overvoltage protection detection. This detection circuit uses a high-precision voltage comparator and sampling resistor network to accurately monitor whether the output voltage exceeds the safe range in real time. The FB pin connects to the output terminal via a 0.8% precision, 0.3W metal film resistor R27, forming a stable voltage feedback regulation loop. The manufacturing process of resistor R27 strictly controls the resistor's precision and temperature coefficient, ensuring the accuracy of feedback regulation. Through the sophisticated circuit logic inside the chip U2 and its collaboration with external components, this module can convert the input voltage into the output voltage AVDD and precisely adjust the output current according to the external control signal.

[0037] Display control module 5: Composed of a display driver chip and related peripheral circuits. The display driver chip is selected based on its high-precision current control capability and rich display control interfaces. Internally, it integrates a powerful microprocessor and memory unit. The microprocessor uses a high-performance CPU core, operates quickly, and can rapidly process user settings commands and complex calculation tasks.

[0038] The storage unit pre-stores a large amount of data on the correspondence between brightness, color temperature and current. This data was obtained through a large number of experiments and optimizations to ensure the accuracy of the calculation results.

[0039] In this embodiment, the display control module 5 primarily receives control signals and converts them into effective control commands for the current regulation main control module 3. The user interface of the display control module 5 uses a touchscreen display or a button-type operation panel. The interface design is simple and intuitive, facilitating user operation. Users can easily set eye protection parameters through this interface, such as adjusting brightness in 3% increments within the 20%-90% range of normal brightness, and adjusting color temperature in 100K increments within the cool (6500K) to warm (2700K) range. Based on the user's settings, the display control module 5 sends accurate current regulation commands to the current regulation main control module 3 via its internal communication interface, achieving precise control of display brightness and color temperature.

[0040] Protection Module 4: Primarily composed of Zener diode D4, which has a Zener voltage of 12V and a power rating of 1.2W. The cathode of Zener diode D4 is connected to the cathode of diode D2 and one end of capacitor C6, while the anode is grounded. It plays a crucial role in overvoltage protection in the circuit. When the output voltage AVDD exceeds 12V, Zener diode D4 quickly conducts, utilizing its unique PN junction breakdown characteristics to clamp the excess voltage at 12V. This prevents excessive voltage from damaging components such as the display driver chip, capacitors, and resistors in subsequent circuits, ensuring the safe and stable operation of the entire circuit system.

[0041] In this embodiment, the main working process of the circuit specifically includes:

[0042] Power Input and Filtering: Upon startup of the DVD device, power input module 1 immediately begins operation, stably receiving the external DVD 5V power supply thanks to its excellent electrical contact and anti-interference capabilities. This power then enters filter module 2. Inductor L11 utilizes its inductive characteristics to initially block high-frequency noise from the input power supply. This is based on the principle of electromagnetic induction; high-frequency signals generate significant inductive reactance in the inductor, thus hindering their passage. Ferrite bead FB further suppresses high-frequency interference signals. Its internal magnetic material and special structure can significantly reduce the loss of high-frequency signals, converting high-frequency energy into heat energy for dissipation. Capacitor C25 effectively filters out low-frequency noise and stabilizes the voltage. Its working principle is that it exhibits different impedance characteristics for signals of different frequencies during charging and discharging; low-frequency signals can pass through the capacitor smoothly, while high-frequency signals are blocked. Capacitor BC26 assists in filtering out high-frequency noise. After this series of coordinated processing, a stable BL5V voltage is output, providing a reliable power foundation for subsequent core circuits.

[0043] Voltage Conversion and Current Regulation: After receiving the BL5V voltage, chip U2 in the current regulation main control module 3 determines whether to start operation based on the enable signal from the connected control chip on its CE pin. When the enable signal is valid, the complex circuit system inside chip U2 begins to operate. The internal switching transistors of the chip turn on and off at a specific frequency. During the on-time, the BL5V voltage charges inductor L2 through the LX pin, and inductor L2 stores energy. Following the energy storage principle of inductance in the law of electromagnetic induction, the current gradually increases in the inductor, and the magnetic field gradually strengthens. During the off-time, inductor L2 releases energy to output capacitor C6 and the load through the LX pin and diode D2, charging capacitor C6. At the same time, capacitor BC16 filters out high-frequency ripple, causing the output voltage AVDD to gradually increase and stabilize at the set value. During this process, the FB pin of chip U2 is connected to the output terminal through resistor R27 to form a voltage feedback loop, monitoring the output voltage in real time. Once the output voltage fluctuates, chip U2 quickly adjusts the internal circuit working state based on the feedback voltage. It changes the on and off time of the switching transistor through the internal precision control circuit to ensure the stability and accuracy of the AVDD voltage. This is a closed-loop control system based on the negative feedback control principle.

[0044] Eye Protection Mode Adjustment: When the user activates eye protection mode and sets eye protection parameters (such as target brightness and target color temperature) through the interactive interface of display control module 5, the microprocessor in display control module 5 quickly calculates the target current value required to achieve the target display effect based on pre-stored data on the correspondence between brightness, color temperature, and current. Subsequently, display control module 5 sends a current adjustment command containing the target current value to current adjustment main control module 3. Upon receiving the command, chip U2 immediately adjusts the duty cycle of the pulse width modulation (PWM) signal output from the LX pin. By changing the duty cycle, the energy storage and release time of inductor L2 is precisely controlled. Based on the principle of PWM control technology, the change in duty cycle directly affects the charging and discharging time of the inductor, thereby achieving precise adjustment of the output current. As the output current changes, the current received by the connected display driver chip also changes accordingly. The display driver chip drives the backlight and liquid crystal molecules of the display device according to the current change. Utilizing liquid crystal display technology and the backlight emission principle, the display brightness and color temperature change, gradually approaching the target brightness and target color temperature set by the user, achieving the ideal display effect adjustment in eye protection mode.

[0045] Protection and Monitoring: Throughout the entire circuit operation, protection module 4 remains in a monitoring state. Zener diode D4 continuously monitors the output voltage AVDD. Once AVDD exceeds 12V, Zener diode D4 quickly conducts, clamping the excess voltage to 12V. Utilizing its reverse breakdown characteristic, when the voltage exceeds its regulated value, the diode enters the breakdown region, causing a sharp increase in current, thereby stabilizing the voltage near the set value. This prevents excessive voltage from damaging components such as the display driver chip, capacitors, and resistors in subsequent circuits, ensuring the safe and stable operation of the entire circuit system. Simultaneously, display control module 5 periodically monitors the critical operating states of the circuit system. It uses a high-precision temperature sensor to detect the operating temperature of chip U2 and a current detection circuit to monitor the operating current of each module. Upon detecting any abnormalities, display control module 5 immediately takes corresponding protective measures, such as reducing output power through the control chip and triggering an alarm circuit to issue warning messages, further ensuring the reliability and stability of the circuit system.

[0046] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A DVD circuit arrangement having an adjustable eye-shaping mode, characterized by The application relates to an eye-protection display device, which comprises the following modules: a power input module for receiving an external input DVD 5V power supply; a filter module, which is connected with the power input module and is used for filtering and outputting a BL 5V voltage; a current regulation master module, which comprises a chip U2, the IN pin of the chip U2 is connected with the BL 5V voltage output by the filter module, the CE pin is connected with a signal for controlling the chip enable, the LX pin is used for connecting an inductor to realize voltage conversion, the OVP pin is used for overvoltage protection detection, and the FB pin is used for connecting a feedback resistor to realize voltage feedback regulation, the current regulation master module is used for converting an input voltage into an output voltage AVDD and adjusting an output current according to an external control signal; a display control module, which receives the AVDD and a control signal output by the current regulation master module and has a user interactive interface, is used for sending a current regulation instruction to the current regulation master module according to an eye-protection parameter set by a user through the user interactive interface to control display brightness and color temperature; and a protection module, which is used for overvoltage protection when the output voltage AVDD exceeds a set value.

2. The DVD circuit arrangement having an adjustable eye-shaping mode according to claim 1, characterized in that The chip U2 is of an SS6635 type.

3. The DVD circuit arrangement having an adjustable eye-shaping mode as recited in claim 1, wherein, The filter module comprises an inductor L11, a magnetic bead FB, a capacitor C25 and a capacitor BC26, one end of the inductor L11 is connected with the output end of the power input module, the other end of the inductor L11 is connected with one end of the magnetic bead FB, the other end of the magnetic bead FB is connected with one end of the capacitor C25 and one end of the capacitor BC26, the other end of the capacitor C25 and the other end of the capacitor BC26 are grounded, the inductor L11 is a patch inductor, the inductance is 10uH-22uH, and the rated current is 2A-3A.

4. The DVD circuit arrangement having an adjustable eye-shaping mode according to claim 3, wherein, The magnetic bead FB is of an FB0603-600R or FB0805-1000R type, and the capacitor C25 is an electrolytic capacitor.

5. The DVD circuit arrangement having an adjustable eye-shaping mode as recited in claim 1, wherein, The current regulation master module further comprises an inductor L2, a diode D2 and a resistor R27, one end of the inductor L2 is connected with the LX pin of the chip U2, the other end of the inductor L2 is connected with the anode of the diode D2, one end of the resistor R27 is connected with the FB pin of the chip U2, and the other end of the resistor R27 is connected with an output end, and the inductor L2 is a power inductor.

6. The DVD circuit arrangement having an adjustable eye-shaping mode as recited in claim 5, wherein, The diode D2 is a Schottky diode, and the resistor R27 is a metal film resistor.

7. The DVD circuit arrangement having an adjustable eye-shaping mode as recited in claim 1, wherein, The protection module comprises a voltage stabilizing diode D4, the cathode of the voltage stabilizing diode D4 is connected with the cathode of the diode D2 and one end of a capacitor C6, and the anode is grounded.

8. The DVD circuit arrangement having an adjustable eye-shaping mode as recited in claim 1, wherein, The display driving chip in the display control module has high-precision current control capability and rich display control interfaces, and can realize accurate control of display brightness and color temperature according to the received current regulation instruction.

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