Display Driving Device Integrating Memory and Power Controller
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Solution Overview
Problem
Display devices experience deviations in luminance between actual display and grayscale data, necessitating compensation to enhance image quality.
Innovation Solution
A driving device with a memory for storing initial setting values, a power source controller for outputting PWM signals, and a switching unit that connects the memory and power source controller to the input and output port through one wire, allowing for the application of MTPHV voltage to fix initial settings and control power source voltages via PWM signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If separate circuits are used for memory and power source controller, then functionality is ensured, but device area and pin count increase
Solution Approach 1:
The patent combines the memory circuit and power source controller circuit into a single integrated driving device, allowing both circuits to share common structural resources and connection interfaces. This merging reduces the overall device area while maintaining the functionality of both separate circuits through shared infrastructure.
Solution Approach 2:
The driving device is designed with multi-functional capabilities where a single device structure supports both memory operations (data storage for luminance compensation) and power source control (PWM signal generation). This universal design allows one device to perform multiple functions that would traditionally require separate dedicated circuits.
2Reliability
If multiple separate circuits are implemented, then functional reliability is maintained, but the number of pins increases
Solution Approach 1:
The patent merges the connection interfaces of the memory circuit and power source controller into a unified pin structure. By combining the input/output ports of both circuits, the device reduces the total number of pins required while ensuring that both circuits maintain their functional reliability through shared connection pathways.
3Object-affected harmful factors
If separate circuits are used, then circuit independence is ensured, but EMI characteristics deteriorate
Solution Approach 1:
The patent combines the memory circuit and power source controller into an integrated structure that reduces electromagnetic interference. By merging the circuits and sharing common reference grounds and power supply pathways, the device minimizes the radiated emissions and susceptibility to EMI that would occur with separate discrete circuits, while maintaining functional independence through proper circuit design.
Data Source
AI summary
A driving device includes a memory configured to store an initial setting value to drive a display, a power source controller configured to output a pulse width modulation (PWM) signal controlling power applied to the display, and a switching unit configured to connect an input and output port to the memory when writing data to a memory and configured to connect the power source controller to the input and output port when driving the display.