Display Panel Pixel Circuits with Shared Emission and Initialization Signals
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Solution Overview
Problem
Existing display panels require a large number of signal lines for light-emitting control and initialization control, leading to a complex structure and reduced resolution.
Innovation Solution
Implementing a display panel with a pixel circuit that includes a PMOS transistor for light-emitting control and an NMOS transistor for initialization, where both transistors receive the same signal, allowing the light-emitting control signal line and initialization signal line to share a common path, thereby reducing the number of signal lines by half.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate light-emitting control signal lines and initialization signal lines are used for each transistor, then each transistor can be independently controlled, but the number of signal lines increases significantly
Solution Approach 1:
The patent combines the light-emitting control signal line and initialization signal line into a single shared signal line. By using complementary transistors (PMOS and NMOS) that respond differently to the same signal levels, the system achieves independent control functionality through a merged signal transmission path, thereby reducing the total number of signal lines required
Solution Approach 2:
The shared signal line serves dual functions: it acts as both the light-emitting control signal line and the initialization signal line. The same physical conductor transmits different control signals at different times or to different transistor types, enabling one line to perform multiple control functions that would traditionally require separate dedicated lines
2Adaptability or versatility
If more signal lines are provided in the display panel, then control functionality is enhanced, but the panel structure becomes more complex and resolution is reduced
Solution Approach 1:
By merging the light-emitting control and initialization control into a single shared signal line, the patent reduces the number of signal lines that need to be precisely manufactured and routed across the panel. This reduction in line density directly improves manufacturability and enables higher resolution displays while maintaining full control functionality through the complementary transistor arrangement
3Reliability
If separate control lines are used for PMOS and NMOS transistors, then each transistor type can be optimized for its specific function, but the number of signal driving circuits increases
Solution Approach 1:
The patent makes a single signal driving circuit serve multiple functions by connecting it to both the PMOS and NMOS transistors through the shared signal line. The driving circuit generates control signals that are simultaneously used for light-emitting control of the PMOS transistor and initialization control of the NMOS transistor, thereby reducing the total number of driving circuits while maintaining optimized control for each transistor type
Data Source
AI summary
The present application discloses a display panel and a display device. The display panel includes: a pixel circuit and a light-emitting element; the pixel circuit includes a driving transistor, a light-emitting control transistor and an initialization transistor; the driving transistor is configured to provide a driving current for the light-emitting element; the light-emitting control transistor is configured to selectively allow the light-emitting element to enter a light-emitting stage; the initialization transistor is configured to provide an initialization signal for the light-emitting element; wherein one of the light-emitting control transistor and the initialization transistor is a P-type transistor, and the other is an N-type transistor, a gate of the light-emitting control transistor receives a light-emitting control signal, and a gate electrode of the initialization transistor receives the initialization signal; wherein the light-emitting control signal and the initialization signal are the same signal.