Display Panel Waveguide Optical Signal Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As display panel resolution and size increase, parasitic capacitors and resistors cause signal attenuation and delay, leading to incorrect output signals, and the increased need for cables results in limited peripheral fan-out pin space and wider bezels.
Innovation Solution
The display panel incorporates waveguides for light control signals and wires for electric signals, with each pixel unit featuring a photo transistor and light filtering unit, allowing for reduced wire quantity and conversion of multiple electric signals into optical signals transmitted on a common optical channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution and panel size are increased, then the display quality is improved, but parasitic capacitors and resistors increase causing signal attenuation and delay
Solution Approach 1:
The patent replaces electrical signal transmission with optical signal transmission using waveguides. Light signals are used to transmit control signals to pixel units, eliminating the parasitic capacitors and resistors that plague electrical transmission in high-resolution displays. This substitution of electrical fields with optical fields resolves the signal attenuation and delay problems while maintaining high resolution.
Solution Approach 2:
The patent introduces waveguides as intermediary structures that carry optical signals from control circuits to pixel units. These waveguides act as mediators that transport light-based control signals without the interference of parasitic electrical elements, thereby maintaining signal integrity in high-resolution displays with increased panel sizes.
2Quantity of substance
If the number of cables is increased to support higher resolution, then the signal transmission capacity is improved, but the peripheral fan-out pin space becomes limited and bezel width increases
Solution Approach 1:
The patent merges multiple electrical control signals into a single optical communication channel. By converting multiple electrical signals into optical signals that can be transmitted through waveguide structures, the system consolidates what would require multiple separate cables into a unified optical transmission medium, thereby reducing peripheral pin space requirements and bezel width while maintaining high signal transmission capacity.
Solution Approach 2:
The waveguide structure serves multiple functions simultaneously: it acts as both the transmission medium for control signals and the structural element that replaces traditional cable routing. This multi-functionality eliminates the need for separate cable management structures, reducing the overall space required for signal transmission infrastructure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces non-ideal coupling among electric elements, alleviates signal transmission impedance, and minimizes the number of signal lines and bezel width, improving update rates and aperture opening ratios.
Implementation Method 1
The waveguides are respectively configured to transmit a light control signal
Implementation Method 2
The light filtering unit is configured to receive a sub control signal from the waveguide to which the light filtering unit is coupled and filter out a specific optical signal according to the received sub control signal as an input signal of the photo transistor
Implementation Method 3
The photo transistor comprises a first end, a second end, and a third end. The first end is electrically connected to the pixel electrode; the second end is electrically connected to one of the wires; and the third end is coupled to the light filtering unit
Data Source
AI summary
A display panel includes waveguides, wires and a pixel array. The pixel array includes a plurality of pixel units. The pixel units are arranged in a plurality of columns and a plurality of rows. Each pixel unit includes a pixel electrode, a light filtering unit, and a photo transistor. The light filtering unit is coupled to one of the waveguides. The photo transistor is electrically connected to the pixel electrode and one of the wires, and is coupled to the light filtering unit. The waveguide transmits a light control signal. Each wire transmits an electric control signal. The light filtering unit is configured to receive a sub control signal from the waveguides to which the light filtering unit is coupled and filter out a specific optical signal according to the received sub control signal as an input signal of the photo transistor.