Independent GOA Units for Random Addressing and Power Reduction
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Solution Overview
Problem
Traditional Gate Driver on Array (GOA) circuits face challenges with increasing screen size and pixel density, leading to degraded drive capability, increased power consumption, and reduced yield due to the proportional increase in load and transistor size requirements, as well as the risk of screen damage from failed GOA units.
Innovation Solution
A GOA circuit design featuring independent GOA units with enable and drive modules, utilizing polarity complementary transistors and Gray coding for random addressing, allowing data to be written to the screen non-sequentially, reducing power consumption, and enabling dynamic repair by decoupling the trigger of later stages from previous stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size of the screen and resolution increase, then the pixel density and number of pixels increase, but the load of the GOA circuit increases and the drive capability is degraded
Solution Approach 1:
The GOA circuit is divided into multiple independent GOA units, each capable of independently driving a row of pixels. This segmentation allows the circuit to handle high-resolution displays by distributing the driving load across multiple units, preventing any single unit from becoming overloaded as resolution increases.
Solution Approach 2:
The patent implements dynamic row selection where only the required row is activated at any given time through the enable module. This dynamic approach allows the circuit to adapt to different display requirements and maintain drive capability by keeping most GOA units in a low-power standby state rather than continuously driving all rows.
2Quantity of substance
If the size of the screen increases, then the number of rows increases, but the scanning time for each row decreases and timing requirements become stricter
Solution Approach 1:
By segmenting the display into independently controllable rows through individual GOA units, the system can manage timing for each row separately. This allows the circuit to meet stricter timing requirements by optimizing the scanning process for each row independently rather than dealing with the entire display as a single unit.
Solution Approach 2:
The enable module prepares the appropriate GOA unit in advance by selecting and enabling it before the actual scanning of the row begins. This preliminary action ensures that the circuit is ready to immediately drive the selected row, reducing delays and meeting tight timing requirements as the number of rows increases.
3Quantity of substance
If the number of rows increases, then the number of stages of GOA units in turn-off state increases, but the load of clock lines and power consumption increase
Solution Approach 1:
The patent extracts and removes the clock signal from driving GOA units that are in the turn-off state. By disabling the clock signal to inactive GOA units, the system eliminates unnecessary power consumption associated with charging and discharging capacitors in non-active stages, thereby reducing overall power consumption as the number of rows increases.
Solution Approach 2:
The system implements periodic activation where only the currently required GOA unit is enabled at any given time. This periodic action pattern, controlled by the enable module, ensures that most GOA units remain in a low-power state while still being able to quickly activate when needed, thus managing power consumption effectively in high-row displays.
4Quantity of substance
If the number of rows increases, then the probability of GOA circuit failure increases, but the risk of screen damage from failed units increases
Solution Approach 1:
By dividing the GOA circuit into independent units with separate enable control, the patent creates isolation between different row drivers. This segmentation ensures that a failure in one GOA unit does not propagate to other units, thereby preventing cascading failures and protecting the overall screen from complete failure even as the number of rows increases.
Solution Approach 2:
The enable module provides a protective mechanism by controlling which GOA units are active at any given time. This beforehand control acts as a cushioning mechanism that prevents inactive units from being affected by failures in active units, thereby protecting the screen from damage and maintaining reliability in high-row configurations.
Data Source
AI summary
The GOA circuit includes a plurality of GOA units independent of each other, wherein each of the plurality of GOA units comprises an enable module and a drive module disposed corresponding to the enable module; wherein the enable module includes a row address signal input terminal configured to receive a row address signal, and an enable signal output terminal configured to output an enable signal based on the row address signal; and the drive module includes an enable signal input terminal configured to receive the enable signal output by the enable signal output terminal, and a drive signal output terminal configured to output a drive signal based on the enable signal, wherein the drive signal output terminal is connected to a gate line of a row disposed corresponding to the drive module to transmit the drive signal to the gate line of the row and gate the row.