Display Control Device Time Division Voltage Drop Reduction
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Solution Overview
Problem
Existing control methods for display devices struggle to optimize the reduction of voltage drop in backlight driving systems, which affects power consumption and screen clarity. Additionally, there is a need for a bi-phase mark code packet transmission synchronization format that can adapt to various applications and system requirements.
Innovation Solution
A control device and method that allows users to define preamble codes and function codes, enabling adaptation to different requirements. The method also involves turning on display units of different channels in time division, staggering the preamble code timing, and adjusting the bit-width ratio of logic 0 to logic 1 to reduce voltage drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all display units are turned on simultaneously, then the screen displays content across all channels, but the voltage drop increases significantly
Solution Approach 1:
The patent applies periodic action by dividing the display units into multiple groups that are activated in alternating time slots. Instead of all display units being on simultaneously, the system cycles through different groups in a periodic manner, ensuring that at any given moment only a subset of display units is active. This temporal distribution reduces the peak current draw and consequently minimizes voltage drop while maintaining overall display coverage across all channels.
Solution Approach 2:
The patent segments the display units into multiple independent groups or channels that can be controlled separately. Each group is assigned to a specific time slot for activation. This segmentation allows the system to manage power consumption by activating only one segment at a time, thereby reducing the total number of simultaneously active display units and lowering the voltage drop across the power supply network.
2Device complexity
If fixed preamble codes and function codes are used, then the control format is simple, but it cannot adapt to different application requirements
Solution Approach 1:
The patent implements dynamics by making the preamble codes and function codes configurable rather than fixed. The system allows dynamic assignment of code values based on different application requirements. Users can define custom preamble and function code sequences to match specific communication protocols or application needs, enabling the same control device to adapt to various scenarios without hardware changes.
Solution Approach 2:
The patent applies parameter changes by allowing modification of code parameters (preamble and function codes) to suit different applications. Instead of using hardcoded fixed values, the system permits these parameters to be adjusted or redefined, providing flexibility in adapting the control format to different communication standards and application-specific requirements while maintaining the overall structure of the protocol.
Data Source
AI summary
A control device for driving a display device includes a first channel having a first output device. The first output device outputs first transfer data to the first channel according to an enable signal. The first transfer data includes a preamble code and a function code. The first output device includes a preamble-code generator and a function-code generator. The preamble-code generator outputs a bit number of a predetermined value as the preamble code according to the bit number of preamble code. The bit number and the predetermined value are defined by the user. The function-code generator converts each of a function-code number of command codes into a respective bit code, and the function-code number of bit codes are output as the function code according to a lookup table. The mapping relationship between the command code and the bit code is stored in the lookup table.