Display Panel Shared Data-Line Pixel Circuit for Lower Driver Area
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Solution Overview
Problem
Existing display devices face increased power consumption and area requirements due to the one-to-one connection of pixels to data lines and the need for channels to output data voltages for multiple colors, leading to higher power consumption and larger data driver size.
Innovation Solution
A display panel design that connects two pixel circuits to a single data line, utilizing PMOS and NMOS transistors for selective data voltage writing, and includes storage capacitors and additional transistors to manage current and voltage, reducing the number of channels and dead space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If each pixel is connected one-to-one to data lines with channels outputting data voltages for multiple colors, then the display can show multiple colors, but the data driver area and power consumption increase
Solution Approach 1:
The patent merges the functions of multiple data lines into a single shared data line. Multiple pixel circuits (first pixel circuit and second pixel circuit) share the same data line, which transmits data voltages for multiple colors sequentially. This reduces the number of data lines and channels required, thereby reducing the data driver area and power consumption while maintaining the capability to display multiple colors.
2Area of stationary object
If pixels arranged in one row are connected one-to-one to data lines, then each pixel receives its data voltage, but the data driver area increases
Solution Approach 1:
The patent combines multiple data transmission paths into a single shared data line. The first pixel circuit and second pixel circuit both connect to the same data line, allowing the data driver to transmit data voltages for multiple colors through one channel. This reduces the data driver area significantly compared to having separate data lines for each pixel.
Solution Approach 2:
The patent employs periodic action by sequentially transmitting data voltages for different colors through the shared data line at different time periods. The first pixel circuit receives data voltages during one period while the second pixel circuit receives data voltages during another period, ensuring each pixel gets its required data without interference.
3Use of energy by moving object
If channels output data voltages for multiple colors, then color display is enabled, but power consumption increases
Solution Approach 1:
The patent merges the color output functions into a single shared data line that sequentially transmits data voltages for multiple colors. The first pixel circuit and second pixel circuit share this data line, and the system alternates between transmitting red, green, and blue data voltages, thereby enabling color display while reducing the power consumption associated with maintaining multiple active channels.
Data Source
AI summary
A display panel includes a data line configured to transmit a data voltage for a color, first and second pixel circuits connected to the data line and positioned at a side of the data line, and one or more light-emitting elements connected to the first and second pixel circuits, wherein the first and second pixel circuits include a first transistor configured to control a driving current flowing to a corresponding light-emitting element of the one or more light-emitting elements, a second transistor configured to transmit the data voltage to a first terminal of the first transistor based on a scan signal, a third transistor configured to connect a second terminal and a gate of the first transistor based on the scan signal, and a selection transistor configured to connect the first terminal of the first transistor and a terminal of the second transistor based on a selection signal.