Segmented Display Drive Circuits for Vehicle Power Reduction
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Solution Overview
Problem
As the number of display devices mounted on a vehicle increases, so does their power consumption, which is a concern for vehicles like hybrids and electric vehicles where reducing power consumption is essential to extend cruising distance.
Innovation Solution
A display device with multiple display regions, where each region has its own scanning line drive circuits and data line drive circuits, allowing for independent control of frame frequencies in adjacent regions to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frame frequency is increased for smooth display, then display quality is improved, but power consumption increases
Solution Approach 1:
The display device is divided into multiple independent display regions, each with its own scanning line drive circuit and data line drive circuit. This segmentation allows each region to operate independently with different frame frequencies, enabling smooth display in critical regions while reducing power consumption in less critical regions.
Solution Approach 2:
Different display regions are assigned different frame frequencies based on their specific display requirements. Critical regions maintaining high frame frequencies for smooth display, while non-critical regions use lower frame frequencies to reduce power consumption, achieving local optimization of display quality and energy efficiency.
2Adaptability or versatility
If multiple display devices are mounted in a vehicle, then information display capability is improved, but power consumption increases
Solution Approach 1:
Multiple display regions are integrated into a single display device with shared control structures (control device, timing controller) and shared physical infrastructure (substrate, pixel structures). This merging reduces the total power consumption compared to using separate display devices while maintaining the ability to display diverse information.
Solution Approach 2:
The display device is designed to serve multiple functions by dividing the display region into multiple independent areas that can display different types of information (vehicle information, navigation, entertainment) simultaneously. Each region can be independently controlled to meet different display requirements, making the single device universal enough to replace multiple specialized devices.
Data Source
AI summary
A display device includes a substrate including a display region including a plurality of divided regions divided into three or more and disposed in a first direction on a main surface, a scanning line extending in a first direction, a data line extending in a second direction, a plurality of pixels, and a scanning line connection wiring line extending in the second direction, which are disposed in each of the plurality of divided regions, a plurality of data line drive circuits respectively connected to the data lines in each of the plurality of divided regions, and a plurality of scanning line drive circuits corresponding to each of the plurality of divided regions. The scanning line drive circuits and the data line drive circuits are arrayed in the first direction outside the display region, each of the plurality of scanning line connection wiring lines electrically connects the scanning line drive circuit to the scanning line, and the plurality of scanning line drive circuits and the plurality of data line drive circuits display an image at a frame frequency different from each other in at least a pair of divided regions adjacent to each other among the plurality of divided regions.