Data Driver Amplifier Sharing for RGBG Display Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices with an RGBG arrangement face challenges in power consumption due to alternately connected red and blue light emitting elements to a single data line, leading to increased power usage for charging and discharging.
Innovation Solution
A data driver is designed with a first amplifier that outputs data voltages to multiple data lines, reducing the number of amplifiers needed and minimizing the area occupied by the data driver, while also ensuring that each data line is connected to pixel driving circuits that control light emitting elements of the same color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light emitting elements of different colors are alternately connected to one data line, then the data driver structure is simplified, but power consumption increases due to repeated charging and discharging
Solution Approach 1:
The patent divides the data lines into multiple separate data lines based on the color of light emitting elements. Instead of using a single data line that alternately connects to different colored elements, the invention creates dedicated data lines for red, green, and blue light emitting elements, thereby eliminating the need to repeatedly charge and discharge a single data line and reducing power consumption.
2Use of energy by moving object
If multiple amplifiers are used to output data voltages to multiple data lines, then power consumption is reduced, but the area occupied by the data driver increases
Solution Approach 1:
The patent combines multiple amplifiers into a single amplifier that can output data voltages to multiple data lines simultaneously. This single amplifier is configured to drive multiple data lines (DL1, DL2, DL3) that are connected to different colored light emitting elements, thereby reducing the number of amplifiers needed and minimizing the data driver area while still avoiding the power consumption issue of alternating connections.
3Device complexity
If data lines are connected to pixel driving circuits of different colors, then the data driver can be more compact, but unnecessary power usage occurs due to alternating voltage charging
Solution Approach 1:
The patent applies local quality by assigning specific data lines to specific colors of light emitting elements. Each data line is dedicated to a particular color (red, green, or blue), ensuring that the data lines are charged only when needed for that specific color. This localized assignment eliminates the waste of charging and discharging data lines alternately for different colors, thereby reducing unnecessary power usage while maintaining a compact data driver structure.
Data Source
AI summary
A display device includes a display panel including pixel driving circuits and light emitting elements, a data driver that outputs data voltages to the pixel driving circuits, and a timing controller that controls the data driver. The data driver includes a first amplifier and second amplifiers. The first amplifier outputs first data voltages to a first data line connected to first pixel driving circuits arranged in a first column and output second data voltages to a second data line connected to second pixel driving circuits arranged in a second column. The second amplifiers output third data voltages to third data lines connected to third pixel driving circuits arranged in third columns which are disposed between the first column and the second column. Thus, the display device reduces the number of amplifiers included in the data driver.