Boosted Signal Selector for High-Resolution Display Charging
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Solution Overview
Problem
Existing signal selectors fail to meet the charging specification requirements for medium-to-large sized, high-resolution display panels due to reduced operation time and increased internal resistance voltage drop, leading to defects like vertical and horizontal stripes on the display.
Innovation Solution
A signal selector with a plurality of switch units, each comprising a switch circuit and a boost circuit, where the boost circuit pulls up the voltage of the output terminal in response to a boost control signal, enabling rapid voltage rise and fall at the output data line, thus addressing the charging ratio shortfall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the display panel size is increased and resolution is improved, then the display quality is enhanced, but the operation time is reduced and internal resistance voltage drop increases, leading to charging specification failures
Solution Approach 1:
The patent applies preliminary action by performing a voltage boost operation before the actual data writing phase. The boost circuit pre-charges the output data line to a higher voltage level, ensuring that even with reduced operation time in high-resolution displays, the line can complete charging within the available timeframe. This preliminary voltage enhancement prevents under-charging conditions that would otherwise occur due to the shortened operation window.
Solution Approach 2:
The patent changes the voltage parameter dynamically by introducing a boost circuit that temporarily increases the voltage on the output data line during the charging phase. This parameter change allows the system to overcome the increased internal resistance voltage drop in high-resolution displays by providing a higher initial voltage that decays to the required level during the operation time, effectively compensating for the R×t product increase.
2Manufacturing precision
If the display panel size is increased and resolution is improved, then the display quality is enhanced, but the internal resistance voltage drop increases, causing charging specification failures
Solution Approach 1:
The boost circuit performs preliminary voltage enhancement before data writing, compensating for the anticipated voltage drop across the increased internal resistance of high-resolution display lines. By pre-charging to a higher voltage level, the system ensures that the voltage at the end of the line remains sufficient despite the higher resistance.
Solution Approach 2:
The patent dynamically changes the voltage parameter by introducing a controlled boost phase that temporarily increases voltage on the output data line. This parameter modification directly counteracts the increased voltage drop caused by higher internal resistance in high-resolution panels, maintaining adequate voltage levels throughout the operation.
3Device complexity
If a simple switch circuit is used, then the device complexity is low, but the voltage cannot be rapidly raised and lowered, failing to meet charging specifications
Solution Approach 1:
The patent merges a switch circuit with a boost circuit to create a hybrid signal selector that combines the simplicity of switching with the voltage-boosting capability. This combination allows rapid voltage transitions by using the switch to enable/disable the boost function, achieving both low complexity and high speed voltage control for meeting charging specifications in high-resolution displays.
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
The solution ensures that the display panel meets the charging specification, preventing defects such as vertical and horizontal stripes by effectively distributing signals to sub-pixels, achieving a charging ratio of 0.99 or higher.
Implementation Method 1
the boost circuit is configured to pull up a voltage of the output terminal of the switch circuit in response to a boost control signal loaded on a control terminal of the boost circuit
Data Source
AI summary
The present disclosure relates to a signal selector and a driving method therefor, a display panel, and a display device. The signal selector loads a writing signal into a control end of a switching circuit during a data writing time period, and the switching circuit is connected in response to the writing signal loaded on the control end of the switching circuit, so that the writing signal is loaded to a far end of an output signal line. During a pull up period after the data writing period, a boost control signal is loaded to the control end of a boost circuit, and the boost circuit pulls up the voltage of an output end of the switching circuit in response to the boost control signal loaded on a second end of the boost circuit.