Display Gate Control Static Discharge Protection Circuit
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Solution Overview
Problem
Display apparatuses are vulnerable to damage from static electricity, which can disrupt the operation of control lines and gate drivers, and existing solutions do not effectively address this issue while also considering manufacturing costs.
Innovation Solution
The display apparatus incorporates parallel-connected static electricity prevention parts with diode units and capacitors to discharge static electricity, utilizing n-type and p-type field effect transistors and zener diodes to manage both positive and negative polarities, thereby protecting control lines and gate drivers, and optimizing the design to reduce manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static electricity prevention parts are added to protect control lines and gate drivers, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple static electricity prevention functions into a single integrated circuit block that handles both positive and negative polarity static electricity through shared components like the first capacitor and transistors, reducing the overall number of discrete components needed
Solution Approach 2:
The first and second static electricity prevention circuits use similar transistor and capacitor configurations that can handle both positive and negative voltage polarities, creating a universal protection mechanism that serves multiple protection needs with a standardized design approach
2Ease of manufacture
If a reduced number of current paths are used in static electricity prevention parts, then manufacturing cost is reduced, but protection effectiveness may be compromised
Solution Approach 1:
The patent uses transistors that can dynamically switch between different current paths based on the polarity of the static electricity detected, allowing the same hardware infrastructure to adaptively route protection currents for both positive and negative polarities without requiring separate dedicated paths for each polarity
Solution Approach 2:
The circuit parameters such as transistor gate voltages and capacitor charging states change dynamically based on the detected static electricity polarity, enabling the same physical current path to serve different protection functions by changing its electrical characteristics rather than requiring separate physical paths
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 effectively prevents damage to control lines and gate drivers from static electricity while minimizing manufacturing costs by using a reduced number of current paths and specialized transistors and capacitors to manage static discharge efficiently.
Implementation Method 1
An anode terminal of the first diode part is connected to the gate control lines, and a cathode terminal of the first diode part is connected to the first and second static electricity prevention circuits
Implementation Method 2
The first capacitor has a capacitance smaller than about 2.2 nF
Implementation Method 3
The first transistor includes an n-type field effect transistor
Implementation Method 4
An anode terminal of the second diode part is connected to the third and fourth static electricity prevention circuits, and a cathode terminal of the second diode part is connected to the gate control lines
Implementation Method 5
Each of the second and third diode units includes a zener diode
Implementation Method 6
The second transistor includes a p-type field effect transistor
Data Source
AI summary
A display apparatus includes a timing controller configured to output a gate control signal through gate control lines, a gate driver configured to output gate signals in response to the gate control signal provided from the gate control lines, pixels configured to receive data voltages in response to the gate signals, and first and second static electricity prevention parts connected to the gate control lines in parallel configured to discharge a static electricity. Each of the first and second static electricity prevention parts is configured to form current paths, which are smaller in number than a number of the gate control lines, to discharge the static electricity and the static electricity configured to be discharged by the first static electricity prevention part has a polarity different from a polarity of the static electricity configured to be discharged by the second static electricity prevention part.