Compressor LED Display Column Scanning Circuit
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Solution Overview
Problem
Existing compressor system control technologies face challenges in efficiently displaying operational messages and faults due to the complexity of power factor correction circuits and the need for efficient LED display management, particularly in HVAC systems, where real-time monitoring and fault indication are critical but power consumption and component count are concerns.
Innovation Solution
An indication system comprising an evaluation module, messaging module, and display module that generates messages based on compressor parameters, converts them into glyph strings, and illuminates an array of LEDs in a column-by-column format without using transistors, reducing power consumption and component count by providing power only to one column at a time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a traditional LED display with transistors is used to display messages, then the display can show multiple columns simultaneously, but power consumption increases and component complexity increases
Solution Approach 1:
The LED display is segmented into multiple columns, with each column being controlled independently. The controller activates one column at a time in sequence, rather than powering all columns simultaneously. This temporal segmentation allows the display to show multiple columns of information while consuming power equivalent to displaying only one column at any given moment, thereby reducing overall power consumption and eliminating the need for complex transistor-based column control circuits.
2Illumination intensity
If power is provided to all LED columns simultaneously, then all columns can be illuminated at once, but power consumption increases
Solution Approach 1:
The display system employs periodic action by sequentially activating different LED columns in rapid succession. Each column is illuminated for a brief period, then turned off while the next column is activated. This periodic activation pattern creates the visual illusion of simultaneous illumination across all columns due to persistence of vision, while actually consuming power only for one column at a time, thus maintaining display brightness while significantly reducing power consumption.
3Ease of operation
If transistors are used to control LED columns, then precise control of each LED is achieved, but component count and circuit complexity increase
Solution Approach 1:
The invention extracts and removes the transistor components from the LED display control circuitry. Instead of using transistors to control each LED column, the system uses a simplified controller that directly drives the LED columns in sequence. This extraction of transistors eliminates the need for complex transistor-based switching circuits, reducing component count and circuit complexity while maintaining the ability to precisely control which columns are illuminated and when.
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
This solution enables efficient and real-time display of operational messages and fault indications in compressor systems, reducing power usage and component complexity while ensuring reliable fault detection and diagnostics in HVAC systems.
Implementation Method 1
The display includes an array of light emitting diodes (LEDs). The display does not include a transistor. The display is configured to receive the output signals and illuminate the LEDs of the display based on the output signals.
Data Source
AI summary
An indication system is provided and includes evaluation, messaging, and display modules and a display. The evaluation module generates a message based on a parameter of a compressor or a drive. The messaging module: generates a message based on the parameter; generates a string of glyphs based on the message; selects a predetermined number of glyphs in the string of glyphs; generates column data for the selected glyphs; and generates packets including the column data. The display module generates output signals based on the packets. The display includes an array of LEDs, does not include a transistor, and illuminates the LEDs based on the output signals. The display module is configured to generate the output signals to illuminate one or more of the LEDS in a column-by-column format, such that power is only provided to one column of the array of LEDs at any moment in time.