Display Driving Module with Staged Signal Conversion for Narrow Frames
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The large number of transistors in the driving module of display panels hinders the realization of a narrow frame due to the significant space occupied by the driving signal generation circuits, which are necessary for providing light emitting and driving signals.
Innovation Solution
A driving module with a first driving circuit and a first conversion circuit, including multiple stages of sub-circuits and sub-modules, is designed to generate and control driving signals efficiently, reducing the space required and allowing for a narrower frame by utilizing transistors of different types to manage voltage signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a driving module with driving signal generation circuits is provided in the peripheral area of the display panel, then the pixel circuit can be driven properly, but the frame width occupied by the driving module becomes relatively large
Solution Approach 1:
The patent extracts the voltage signal generation function from the traditional driving module and places it directly within the pixel circuit. Specifically, the first conversion circuit (including first conversion sub-circuits) is integrated into the pixel circuit, allowing each pixel to generate its own voltage signals (ELVDD, ELVSS, EMIT) locally, thereby eliminating the need for a separate driving module in the peripheral area and reducing the frame width.
Solution Approach 2:
The patent implements nesting by integrating the voltage signal generation circuits (first conversion circuit, second conversion circuit) directly within the pixel circuit structure. The conversion circuits are nested inside the pixel circuit, allowing multiple functions (pixel driving + voltage generation) to be combined in a compact configuration, which reduces the overall space required.
2Area of stationary object
If multiple conversion circuits are integrated into the pixel circuit, then the space occupied by the driving module is reduced, but the number of transistors and circuit complexity increases
Solution Approach 1:
The patent segments the voltage signal generation function into multiple independent conversion circuits (first conversion circuit, second conversion circuit), each responsible for generating specific voltage signals. This segmentation allows for modular design and independent optimization of each conversion circuit, managing complexity through functional decomposition while achieving compact integration.
Solution Approach 2:
The patent utilizes parameter changes by employing transistors with different threshold voltages (first transistor with first threshold voltage, second transistor with second threshold voltage) to control the generation of different voltage signals. By changing the threshold voltage parameter of transistors, the circuit can generate multiple different voltage levels (ELVDD, ELVSS, EMIT) from the same input signals, reducing the need for additional circuit components.
Data Source
AI summary
A driving module includes a first driving circuit and a first conversion circuit; n is a positive integer; the first driving circuit includes a plurality of stages of first driving sub-circuits; the first conversion circuit includes a plurality of first conversion sub-circuits; an nth stage of first driving sub-circuit outputs an nth stage of first driving signal; an (n−1)th stage of first driving sub-circuit outputs an (n−1)th stage of first driving signal; the nth first conversion sub-circuit is configured to control the nth stage of second driving signal output terminal to output the nth stage of second driving signal under the control of the (n−1)th stage of first driving signal and the nth stage of first driving signal according to the first voltage signal and the second voltage signal.