Display Drive Circuit for Residual Charge Recovery on Data Lines
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Solution Overview
Problem
Existing drive circuits for display devices face challenges in consistently collecting residual charges from data lines due to irregular voltage changes, leading to situations where residual charges cannot be stored in capacitors.
Innovation Solution
The drive circuit incorporates one or more data channel units, a first and second capacitor, and a comparison unit, with logic operation units controlling switches to manage the connection and disconnection of capacitors and data lines based on voltage comparisons and signal states, ensuring residual charges are collected and stored effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single capacitor is used to collect residual charges from data lines, then the device complexity is reduced, but the reliability of charge collection fails under irregular voltage changes
Solution Approach 1:
The single capacitor is segmented into two capacitors (first capacitor and second capacitor) with different connection configurations. The first capacitor connects to the data line through a first switch, while the second capacitor connects directly to the data line. This segmentation allows the system to handle different voltage change scenarios reliably, as each capacitor can be activated based on the specific voltage condition.
Solution Approach 2:
The patent introduces dynamic switching control where switches (first switch, second switch, third switch) dynamically connect or disconnect capacitors based on voltage comparison results. The judgment unit compares voltage values and controls the switches to activate the appropriate capacitor configuration, making the charge collection system adaptive to irregular voltage changes rather than static.
2Use of energy by moving object
If residual charges are collected and stored in a capacitor, then power consumption is reduced, but the effectiveness fails when voltage changes are irregular
Solution Approach 1:
The patent implements a feedback mechanism where the judgment unit continuously monitors voltage values on the data line and compares them against reference voltages. Based on this feedback, the control unit dynamically adjusts which capacitor to use and how to connect it, ensuring that charge collection remains effective regardless of irregular voltage changes. This closed-loop control maintains power efficiency by always using the optimal capacitor configuration.
Solution Approach 2:
The system changes operational parameters (which capacitor is active, how it's connected) based on the detected voltage conditions. When the voltage on the data line exceeds a threshold, the system switches between different capacitor configurations to optimize charge collection. This parameter adaptation ensures reliable power consumption reduction across varying voltage scenarios.
3Productivity
If the capacitor is always connected to the data line, then charge collection is continuous, but the device complexity and energy loss increase
Solution Approach 1:
Instead of continuous connection, the patent employs periodic or conditional connection through switches that activate capacitors based on specific voltage conditions. The judgment unit triggers switch activation only when voltage thresholds are met, creating a periodic rather than continuous connection pattern. This reduces energy loss from continuous charging while maintaining effective charge collection when needed.
Solution Approach 2:
The patent uses a judgment unit that performs preliminary voltage assessment before activating charge collection. The third switch is controlled based on voltage comparison results, activating the second capacitor only when conditions warrant it. This preliminary evaluation prevents unnecessary charge collection operations, reducing energy loss while maintaining productivity when actually needed.
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 approach ensures full collection and storage of residual charges on data lines, reducing power consumption in the display device by optimizing charge management.
Implementation Method 1
a first capacitor and a second capacitor, and a comparison unit. Two input terminals of the comparison unit are connected to one end of the first capacitor and a reference voltage respectively. The other end of the first capacitor is connected to one end of the second capacitor
Implementation Method 2
The first control switch is connected to the output terminal of the data channel and one end of the first capacitor connected to the comparison unit, and the second control switch is connected to the output terminal of the data channel and one end of the second capacitor connected to the first capacitor
Data Source
AI summary
A drive circuit for a display device includes one or more data channel units, a first and second capacitors, and a comparison unit. The data channel unit includes a data channel, a judgment unit, a logic operation unit, a first control switch and a second control switch. The first control switch is connected to the output end of the data channel and one end of the first capacitor which is connected to the comparison unit. The second control switch is connected to the output end of the data channel and one end of the second capacitor which is connected to the first capacitor. Two output terminals of the logic operation unit are configured to output first and second switch control signals to control the switching of the first and second control switches.