OLED Display Visible Ray Communication Speed Control
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Solution Overview
Problem
Conventional image display devices, such as LCDs, are inadequate for visible ray communication due to limitations in controlling visible ray signals, particularly in speed and area control, as they rely on fluorescent lamps or LEDs as backlight units, which restrict efficient data transmission and reception.
Innovation Solution
An OLED display device with OLED pixels and light receiving units on a substrate, allowing for simultaneous image display and high-speed visible ray signal transmission and reception, utilizing a control unit to manage and convert visible ray signals without affecting the image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If LCD uses fluorescent lamp as backlight unit, then image display function is provided, but visible ray signal transmission is not suitable due to slow response speed and continuous light emission
Solution Approach 1:
The patent replaces the fluorescent lamp backlight system with OLED pixels that can be individually controlled. Each OLED pixel acts as an independent light source that can be rapidly switched on and off, substituting the mechanical liquid crystal switching mechanism with direct electrical control of light emission, thereby achieving microsecond-level response times suitable for visible ray communication
Solution Approach 2:
The patent changes the operational parameters of the light source from continuous emission (fluorescent lamp) to controllable pulsed emission (OLED pixels). By controlling the on/off state and duty cycle of individual OLED pixels, the system achieves both high-speed response for communication and appropriate illumination levels for display
2Adaptability or versatility
If LCD uses LED as backlight unit, then visible ray communication can be performed, but control area is difficult to manage due to limited number of LED devices
Solution Approach 1:
The patent divides the backlight system into individual controllable OLED pixels arranged in a grid pattern. Each pixel can be independently controlled to transmit visible ray signals, allowing precise control of communication areas. This segmentation enables flexible control of large display areas while maintaining communication capability, as each pixel acts as an independent communication unit
Solution Approach 2:
The patent makes each OLED pixel serve multiple functions: it acts as both a display element and a visible ray transmission unit. This multi-functionality eliminates the need for separate communication devices and allows the entire display area to participate in visible ray communication simultaneously, simplifying the overall system architecture
3Productivity
If OLED pixels are turned on and off quickly for visible ray communication, then communication speed is improved, but image display quality may be affected
Solution Approach 1:
The patent employs periodic modulation of OLED pixel states for visible ray communication, where pixels are switched on and off at high frequencies. By using pulse-width modulation and controlling the duty cycle, the system achieves high-speed communication while maintaining average luminance levels that ensure good image display quality. The periodic action allows separation of communication signals from display content
Solution Approach 2:
The patent introduces a control unit that acts as an intermediary between the communication signals and the OLED pixels. This control unit modulates the pixel states to encode communication information while maintaining display quality, and simultaneously processes received visible ray signals. The intermediary function allows independent optimization of communication speed and display quality
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
Enables effective two-way wireless communication by quickly turning on and off OLED pixels to transmit visible ray signals, overcoming the limitations of LCDs and allowing for data transmission and reception without additional devices, enhancing communication speed and control.
Implementation Method 1
a plurality of OLED pixels that are formed on the substrate and generate a red (R), green (G), or blue (B) visible ray
Implementation Method 2
a plurality of light receiving units that are formed on the substrate to sense a visible ray signal and convert the visible ray signal to an electrical signal
Data Source
AI summary
Provided is an organic light emitting diode (OLED) display device for visible ray communication, including: a substrate; a plurality of OLED pixels that are formed on the substrate and generate a red (R), green (G), or blue (B) visible ray; and a plurality of light receiving units that are formed on the substrate to sense a visible ray signal and convert the visible ray signal to an electrical signal.