Vehicle Display Power Circuit to Prevent Screen Flashing
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Solution Overview
Problem
Display apparatuses in vehicles are prone to malfunction or screen flashing when insufficient power is supplied from the vehicle's battery or power is cut off, leading to potential errors and short circuits in the light-emitting diodes.
Innovation Solution
Incorporating a buck converter that adjusts a high potential voltage from a boost converter to a logic voltage and outputs it to a driver power circuit, ensuring stable operation by maintaining voltage levels even during power cutoffs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display apparatus operates directly from the vehicle's battery, then the structure is simple, but screen flashing and malfunction occur when power is insufficient or cut off
Solution Approach 1:
A buck converter is introduced as an intermediary component between the battery and the display apparatus. The buck converter receives high potential voltage from the battery and converts it to a stable logic voltage, preventing screen flashing and malfunction when power is cut off. This intermediary device isolates the display from direct battery power fluctuations.
Solution Approach 2:
The buck converter changes the voltage parameter from high potential voltage to logic voltage through electromagnetic conversion. This parameter transformation ensures that the display apparatus receives a stable, appropriate voltage level regardless of battery power variations, thereby improving reliability without significantly complicating the overall structure.
2Reliability
If a buck converter is added to convert high potential voltage to logic voltage, then display stability improves, but device complexity increases
Solution Approach 1:
The buck converter is designed to perform multiple functions: voltage conversion, power management, and protection against power cutoff effects. By consolidating these functions into a single component, the overall device complexity is minimized while achieving improved power stability and display reliability.
Solution Approach 2:
The buck converter automatically adjusts its operation based on the input power conditions. When power is cut off or becomes insufficient, the converter self-regulates to maintain stable logic voltage output, eliminating the need for additional control circuits or manual intervention, thereby limiting the increase in device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents screen flashing and short circuits in the display apparatus by maintaining voltage levels, allowing the display to operate reliably without battery power.
Implementation Method 1
a buck converter configured to receive the high potential voltage output from the boost converter, to convert the high potential voltage to a logic voltage, and to output the logic voltage
Data Source
AI summary
A display apparatus includes a boost converter configured to boost a voltage input thereto to a high potential voltage and to output the high potential voltage; a pixel power circuit configured to generate a pixel driving voltage for operation of pixels disposed in the display apparatus based on the high potential voltage, and to supply the generated pixel driving voltage to the pixels; a buck converter configured to receive the high potential voltage to convert the received high potential voltage to a logic voltage, and to output the converted logic voltage; and a driver power circuit configured to receive the output logic voltage, to convert the received logic voltage to an operating voltage for operation of the display apparatus, and to output the operating voltage. Thus, even when power supplied from the vehicle's battery to the display apparatus is cut off, screen flashing is prevented from occurring.