Display Level Shifter Output Setting for Fewer Channel Bits
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Solution Overview
Problem
Existing display devices face challenges in reducing the number of data bits required to specify an output channel, leading to increased data transmission and reception time, and difficulty in easily specifying and modulating the output voltage level in a serial-parallel interface.
Innovation Solution
A level shifter with an output setting circuit that selects an output channel and state based on transmission signals, utilizing a state value setter, storage, and driving circuit to generate and output high or low voltages efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a conventional level shifter uses a serial-parallel interface with fixed output channels, then the interface is simple to implement, but the number of data bits required to specify an output channel increases, leading to longer data transmission and reception time
Solution Approach 1:
The level shifter employs dynamic channel selection where the output channel is not fixed but can be changed in real-time based on transmission signals. The output setting circuit dynamically configures which channel (first or second) outputs the level-shifted signal by responding to control signals, allowing flexible channel assignment that reduces the data bits needed for channel specification while maintaining simple interface structure.
Solution Approach 2:
The level shifter pre-configures two parallel output channels with different level-shifting characteristics before data transmission begins. By having both channels ready in advance and using a compact control mechanism to select between them, the system avoids the need for extensive data bits to specify channels during transmission, thereby reducing transmission time while keeping the control structure manageable.
2Adaptability or versatility
If the level shifter allows flexible selection of output channels and voltage levels, then it can easily modulate output voltage, but the device complexity increases due to additional control circuits
Solution Approach 1:
The level shifter integrates multiple functions into a single compact circuit block. The same output setting circuit that selects between the first and second output channels also controls the voltage level output state. This multi-functional design allows flexible channel and voltage selection without proportionally increasing circuit complexity, as one control structure serves multiple purposes.
Solution Approach 2:
The patent merges the channel selection function and voltage level control function into a unified output setting circuit. Instead of having separate control mechanisms for channel selection and voltage modulation, the system combines these functions so that a single set of control signals simultaneously determines both the active channel and the output voltage state, thereby reducing overall circuit complexity while maintaining versatility.
3Measurement precision
If the level shifter uses separate control signals for each output channel, then each channel can be precisely controlled, but the number of data bits increases making it difficult to specify output channels easily
Solution Approach 1:
The system extracts the channel selection information from the main data stream and handles it through a dedicated, compact control signal path. Instead of embedding detailed channel specification data within the primary data transmission, the system uses separate, streamlined control signals that directly select between the two pre-configured channels. This separation allows precise channel control without increasing the data bits in the main transmission path.
Solution Approach 2:
The output setting circuit acts as an intermediary between the control signals and the two output channels. It receives compact control signals and translates them into precise channel selection and voltage level control. This intermediary structure enables precise control of individual channels while keeping the control signal format simple and compact, avoiding the need for extensive data bits.
Data Source
AI summary
Provided is a display device including a display panel configured to display an image, a scan driver configured to supply a scan signal to the display panel, a level shifter configured to generate gate control signals to drive the scan driver, a power supply configured to supply a voltage to the level shifter, and a timing controller configured to control the level shifter. The level shifter includes a level shifter output setting circuit implemented, so that at least one output channel is selected based on transmission signals supplied from the timing controller and an output state of the selected output channel is selected as a high voltage or a low voltage.