A display module circuit
By introducing a power supply module, a driver chip, and a step-down isolation circuit into the display module circuit, combined with a filter, the problems of high circuit complexity, high power consumption, and weak anti-interference ability are solved, achieving circuit simplification, cost reduction, and improved stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU CHUANGYE OPTOELECTRONICS TECHNOLOGY CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-26
AI Technical Summary
Existing display module circuits suffer from high circuit complexity, high power consumption, and weak anti-interference capabilities, which affect device performance and user experience.
By employing a power module, driver chip, and step-down isolation circuit, combined with a power filter, and through a multi-channel parallel drive architecture and LC power filter, and integrating a transistor-resistor inverting circuit, the power signal is stepped down, isolated, and filtered, providing high-quality power signal.
It simplifies circuit design, reduces production costs, improves circuit compatibility and anti-interference capabilities, reduces energy waste, and ensures stable operation of the main control board circuit.
Smart Images
Figure CN224289632U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of display module technology, specifically a display module circuit. Background Technology
[0002] With the continuous development of display technology, display modules are being used more and more widely in various electronic devices. However, existing display module circuits have many shortcomings, which seriously affect the performance of the devices and the user experience.
[0003] Existing display module circuits typically distribute power management, driving, and testing functions in a decentralized design, leading to a series of problems. First, high circuit complexity: the numerous decentralized functional modules result in a complex circuit board layout, increasing both the difficulty of circuit design and manufacturing costs. Second, high power consumption: because each functional module operates independently, it cannot be optimized collaboratively according to actual load requirements, leading to significant energy waste. For example, in some portable electronic devices, excessive power consumption can drastically shorten battery life, causing inconvenience to users. Third, weak anti-interference capability: the decentralized circuit design makes electromagnetic interference more prominent, making the device susceptible to external electromagnetic influences, resulting in noise, flickering, and other problems in the display, affecting display quality. Utility Model Content
[0004] The purpose of this invention is to provide a display module circuit to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A display module circuit, comprising:
[0007] A power module and a driver chip are provided. The power module is connected to a step-down isolation circuit, which is connected to a power filter. The power module is also connected to the driver chip.
[0008] The driver chip is model HX8363-A03;
[0009] The power filter uses a CW4EL2, and the power filter consists of a filter circuit composed of capacitors, inductors, and resistors.
[0010] Preferably, the step-down isolation circuit includes: a BAT2+ terminal, a step-down isolation main module U44, a self-resetting F2, an inductor L6, a safety capacitor C139, a safety capacitor C140, an aluminum electrolytic capacitor U45, an aluminum electrolytic capacitor U46, a tantalum capacitor C144, a tantalum capacitor C145, a capacitor C149, a capacitor C126, a capacitor C127, a capacitor C128, and a capacitor C129.
[0011] Preferably, the BAT2+ terminal is connected to the positive terminal of a 12V power supply and to one end of the self-resetting F2. The other end of the self-resetting F2 is connected to the positive terminal of capacitor U45 and capacitor C144. One end of inductor L6, the negative terminal of capacitor U45, and the other end of capacitor C144 are connected to the BGND terminal and the negative terminal of a 12V power supply. The other end of inductor L6 is connected to one end of capacitor C145.
[0012] Preferably, the positive terminal of the capacitor U46 is the vin terminal of pin 3 of the step-down isolation main module U44.
[0013] Preferably, the negative terminal of capacitor U46 and the other end of capacitor C145 are connected to BGND and input to the negative terminal of 12V power supply.
[0014] Preferably, the +VO terminal of pin 4 of the step-down isolation main module U44 is connected to A5V along with one end of capacitors C149, C126, C127, C128, and C129, and the positive terminal of the step-down isolation main module U44 outputs +5V power.
[0015] Preferably, the other end of capacitors C149, C126, C127, C128, and C129 is connected to the AGND terminal, and the negative terminal of the +5V power supply output of the step-down isolation main module U44 is connected.
[0016] Preferably, pin 2 (GND) of the step-down isolation main module U44 is connected to pin 3 (BGN) (D), and pin 1 (Ctrl) and pin 5 (Trim) of the step-down isolation main module U44 are left unconnected.
[0017] Preferably, the 0V terminal of pin 6 of the step-down isolation main module U44 is connected to the AGND terminal, and the step-down isolation main module U44 outputs a +5V power supply negative terminal.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] This invention supplies 12V power to the power board circuit via BAT2+ (12V positive) and BGND (12V negative). After two-stage step-down isolation, two +5V power voltages are isolated: one A5V and the other D5V. These are then filtered by their respective filter circuits to remove power ripple, resulting in A5V_O and D5V_O outputs respectively. This achieves a combination of step-down, isolation, and filtering, providing high-quality power signals to the main control board circuit, ensuring stable operation and preventing external interference. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2This is a schematic diagram of the step-down isolation circuit of this utility model. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figure 1-2 A display module circuit, comprising:
[0024] A power module and a driver chip are provided. The power module is connected to a step-down isolation circuit, which is connected to a power filter. The power module is also connected to the driver chip.
[0025] The driver chip is model HX8363-A03;
[0026] The power filter uses a CW4EL2, and the power filter consists of a filter circuit composed of capacitors, inductors, and resistors.
[0027] In the above technologies, the driver chip adopts a multi-channel parallel driving architecture, which can meet the needs of different display resolutions and color depths, while being compatible with TTL and LVDS interfaces, thus improving the compatibility and versatility of the circuit. The integrated transistor-resistor inverting circuit uses a combination of transistors and resistors to replace the traditional 74HC04 chip, which greatly reduces the cost by 40% while realizing the signal inversion function.
[0028] Power filters include LC power filters and ferrite beads. LC power filters can filter out high-frequency noise and low-frequency ripple in the power supply, while ferrite beads have a good suppression effect on high-frequency noise, effectively improving the stability and purity of the power supply.
[0029] like Figure 2As shown, the step-down isolation circuit includes: a BAT2+ terminal, a step-down isolation main module U44, a self-resetting capacitor F2, an inductor L6, safety capacitors C139 and C140, aluminum electrolytic capacitors U45 and U46, tantalum capacitors C144, C145, C149, C126, C127, C128, and C129. The BAT2+ terminal receives the positive terminal of a 12V power supply and is connected to one end of the self-resetting capacitor F2. The other end of the self-resetting capacitor F2 is connected to the positive terminal of capacitor U45 and capacitor C144. One end of inductor L6, the negative terminal of capacitor U45, and the other end of capacitor C144 are connected to the BGND terminal and receive the negative terminal of a 12V power supply. The other end of inductor L6 is connected to one end of capacitor C145, the positive terminal of capacitor U46, and pin 3 (vin) of the step-down isolation main module U44. The negative terminal of capacitor U46 is also connected to... The other end of capacitor C145 is connected to BGND and input to the negative terminal of a 12V power supply. The +VO terminal of pin 4 of the buck isolation main module U44, together with one end of capacitors C149, C126, C127, C128, and C129, is connected to A5V, and the buck isolation main module U44 outputs a +5V power supply positive terminal. The other end of capacitors C149, C126, C127, C128, and C129 is connected to the AGND terminal, and the buck isolation main module U44 outputs a +5V power supply negative terminal. The GND terminal of pin 2 of the buck isolation main module U44 is connected to the BGN terminal D. The Ctrl terminal of pin 1 of the buck isolation main module U44 and the Trim terminal of pin 5 of the buck isolation main module U44 are left floating. The 0V terminal of pin 6 of the buck isolation main module U44 is connected to the AGND terminal, and the buck isolation main module U44 outputs a +5V power supply negative terminal.
[0030] In the above technology, a 12V power supply is supplied to the power board circuit through BAT2+ (positive input) and BGND (negative input). After two-way step-down isolation, two +5V power supply voltages are isolated, one A5V and the other D5V. Then, through their respective filter circuits, power ripple filtering is performed, and A5V_O and D5V_O are output respectively after filtering. This achieves the effects of step-down, isolation, and filtering, providing high-quality power signal to the main control board circuit, enabling the main control board circuit to operate stably and without external interference.
[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A display module circuit, characterized in that, include: A power module and a driver chip are provided. The power module is connected to a step-down isolation circuit, which is connected to a power filter. The power module is also connected to the driver chip. The driver chip is model HX8363-A03; The power filter uses a CW4EL2, and the power filter consists of a filter circuit composed of capacitors, inductors, and resistors.
2. The display module circuit according to claim 1, characterized in that, The step-down isolation circuit includes: BAT2+ terminal, step-down isolation main module U44, self-resetting F2, inductor L6, safety capacitor C139, safety capacitor C140, aluminum electrolytic capacitor U45, aluminum electrolytic capacitor U46, tantalum capacitor C144, tantalum capacitor C145, capacitor C149, capacitor C126, capacitor C127, capacitor C128, and capacitor C129.
3. A display module circuit according to claim 2, characterized in that, The BAT2+ terminal is connected to the positive terminal of a 12V power supply and to one end of the self-resetting F2. The other end of the self-resetting F2 is connected to the positive terminal of capacitor U45 and capacitor C144. One end of inductor L6, the negative terminal of capacitor U45, and the other end of capacitor C144 are connected to the BGND terminal and the negative terminal of a 12V power supply. The other end of inductor L6 is connected to one end of capacitor C145.
4. A display module circuit according to claim 3, characterized in that, The positive terminal of capacitor U46 and pin 3 (vin) of the step-down isolation main module U44.
5. A display module circuit according to claim 4, characterized in that, The negative terminal of capacitor U46 and the other end of capacitor C145 are connected to BGND and the negative terminal of 12V power supply.
6. A display module circuit according to claim 5, characterized in that, The +VO terminal of pin 4 of the buck isolation main module U44, together with one end of capacitors C149, C126, C127, C128, and C129, is connected to A5V, and the buck isolation main module U44 outputs a +5V power supply positive terminal.
7. A display module circuit according to claim 6, characterized in that, The other ends of capacitors C149, C126, C127, C128, and C129 are connected to the AGND terminal, which is the negative terminal of the +5V power supply output of the step-down isolation main module U44.
8. A display module circuit according to claim 7, characterized in that, The GND pin 2 of the buck isolation main module U44 is connected to the BGN pin D, and the Ctrl pin 1 and the Trim pin 5 of the buck isolation main module U44 are left floating.
9. A display module circuit according to claim 8, characterized in that, The 0V pin of the step-down isolation main module U44 is connected to the AGND pin, and the step-down isolation main module U44 outputs a +5V power supply negative terminal.