LVDS Interface Circuit for Frame Ratio Signal Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing Low Voltage Differential Signaling (LVDS) interface circuit in image display devices faces complexity and cost increases when trying to transmit additional control signals, such as frame ratio setting signals, without increasing the number of TTL signal transmission lines and buffers.
Innovation Solution
A device and method that include an LVDS transmission unit for converting external image data and control signals into LVDS signals, and an LVDS reception unit for converting these signals back into TTL signals, using a TTL-TO-LVDS converter, Phase Locked Loop (PLL), and buffers to align and supply the signals to drivers for displaying images on an image display panel without increasing signal transmission lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional control signals are transmitted through the LVDS interface circuit, then user convenience and display functionality are improved, but the circuit complexity and cost increase
Solution Approach 1:
The patent applies multi-functionality by enabling the existing LVDS interface circuit to transmit both traditional control signals (Hsync, Vsync, DE, CLK) and additional control signals (frame ratio setting signals) through the same transmission lines. The LVDS transmission unit encodes multiple types of signals into the LVDS format, and the reception unit decodes them back, allowing the circuit to serve multiple functions without adding physical transmission lines or buffers.
2Adaptability or versatility
If additional control signals are transmitted through the LVDS interface circuit, then user convenience and display functionality are improved, but the cost increases
Solution Approach 1:
The patent reduces cost by making the existing LVDS interface circuit multi-functional. Instead of adding separate transmission lines and buffers for frame ratio setting signals (which would increase manufacturing cost), the invention encodes these additional signals into the existing LVDS transmission format, allowing the same hardware infrastructure to support enhanced functionality without additional component costs.
3Adaptability or versatility
If the number of TTL signal transmission lines and buffers is increased to support additional control signals, then signal transmission capability is improved, but the LVDS interface circuit becomes complicated
Solution Approach 1:
The patent merges the transmission of traditional control signals and frame ratio setting signals into a single LVDS transmission channel. The LVDS transmission unit combines multiple TTL signals (image data, Hsync, Vsync, DE, CLK, and frame ratio setting signals) into unified LVDS signals that share the same transmission lines (D0, D1, D2) and buffers, thereby maintaining signal transmission capability while avoiding circuit complexity.
Data Source
AI summary
A device for driving an image display device that includes an image display panel, a plurality of drivers for driving the image display panel, a Low Voltage Differential Signaling (LVDS) transmission unit for converting external image data and a plurality of control signals including frame ratio setting signals into LVDS signals and transmitting the same, an LVDS reception unit for converting the image data and the plurality of control signals including frame ratio setting signals OP1, OP1 converted into the LVDS signals and transmitted thus into TTL signals and forwarding the same, and a timing controller for aligning the image data to fit to the display frame ratio according to the frame ratio setting signal and the plurality of control signals from the LVDS reception unit and supplying the same to the plurality of drivers, for displaying the image on the image display panel.