Display Device Visible Light Communication Frequency Control
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Solution Overview
Problem
Visible light communication (VLC) technology has a limited application range and information transmission capacity due to its reliance on a single LED, restricting the amount of data that can be transmitted effectively.
Innovation Solution
A display device with a plurality of light-emitting elements controlled by a control IC, where the elements are turned on at a first frequency for display data and turned on and off at a second, higher frequency for VLC, integrating VLC functionality into the display while maintaining normal display functions, and utilizing a divided display region and optical signal detectors for independent data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If VLC technology uses a single LED, then the device structure is simple, but the application range and information transmission capacity are limited
Solution Approach 1:
The patent combines VLC communication function with display function into a single display device. The display panel includes both light-emitting elements for display and optical signal detectors for receiving VLC signals, merging two separate functions (display and communication) into one integrated device, thereby expanding VLC application range without proportionally increasing complexity
Solution Approach 2:
The display device is designed to perform multiple functions: it can display images through light-emitting elements and simultaneously receive and transmit VLC data through optical signal detectors and light-emitting elements. This multi-functional design allows the same hardware to serve both display and communication purposes, enhancing versatility
2Loss of information
If a single LED is used for VLC, then the device is simple, but the data transmission capacity is restricted
Solution Approach 1:
The display panel is divided into multiple display sub-regions, each capable of independent VLC data transmission. By segmenting the display area into multiple independent zones, the system can transmit multiple data streams simultaneously through different sub-regions, significantly increasing overall information transmission capacity
Solution Approach 2:
The patent transitions from single-LED point-to-point communication to a two-dimensional array of light-emitting elements and sub-regions. This spatial dimensionality expansion allows parallel data transmission across multiple elements and regions, dramatically increasing bandwidth and information capacity
3Speed
If light-emitting elements are controlled at high frequency for VLC, then data transmission speed increases, but normal display function may be affected
Solution Approach 1:
The control IC applies different control signals to different groups of light-emitting elements with different frequencies. Display-related elements operate at standard display refresh frequencies while VLC elements operate at higher frequencies for data transmission. This periodic differentiation allows both functions to coexist without interference
Solution Approach 2:
The system dynamically adjusts the operating frequency of light-emitting elements based on their intended function. The control IC can switch between display mode and VLC mode, and within VLC mode, different sub-regions can operate at different frequencies simultaneously. This dynamic adaptability ensures both display quality and communication speed
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
Enlarges the application range of VLC technology and increases data transmission capacity by allowing simultaneous image display and high-speed data transmission without affecting the normal display function, enabling communication with other visible light processing devices.
Implementation Method 1
the control IC is configured to control the plurality of light-emitting elements to be turned on at a first frequency so as to display display-related data, and control at least two light-emitting elements of the plurality of light-emitting elements to be turned on and off at a second frequency greater than the first frequency so as to transmit visible light data
Implementation Method 2
an optical signal detector for detecting a visible light signal is arranged in the non-pixel region. The control IC is connected to the optical signal detector, and further configured to receive a detection signal generated by the optical signal detector in accordance with the detected visible light signal
Data Source
AI summary
A display device and a driving method are provided. The display device includes a display panel and a control IC. The display panel includes a plurality of light-emitting elements. The control IC is configured to control the plurality of light-emitting elements to be turned on at a first frequency so as to display display-related data, and control at least two light-emitting elements of the plurality of light-emitting elements to be turned on and off at a second frequency greater than the first frequency so as to transmit visible light data.