What is LVDS Interface?
LVDS (Low Voltage Differential Signaling) interface, also known as RS-644 bus interface, is a data transmission and interface technology proposed in the 1990s. It was developed by National Semiconductor Corporation to address the limitations of traditional TTL-level signal transmission, such as high power consumption and electromagnetic interference.
The LVDS interface is a digital video signal transmission method developed by NS National Semiconductor Corporation of the United States to overcome the shortcomings of large power consumption and large electromagnetic interference when transmitting broadband high-bit-rate data in TTL level mode. Due to its low-voltage and low-current drive method, low noise and low power consumption are achieved.
LVDS technology has the characteristics of low power consumption, low bit error rate, low crosstalk, and low radiation. Its transmission medium can be a copper PCB connection or balanced cable. These features make it ideal for applications demanding high signal integrity and minimal jitter. LVDS has been more and more widely used in systems that require high signal integrity, low jitter, and common mode characteristics, and is commonly used in LCD TVs, and touch computer monitor.
Interface Circuit Type
LVDS interfaces come in various configurations depending on the bit depth of the LCD panel and the number of channels used to transmit RGB data. Like the TTL interface, the LVDS interface circuit is also divided into two modes: single-channel RGB data transmission and odd/even pixel dual-channel RGB data transmission (also known as single-port LVDS, dual-port LVDS, 1-pixel LVDS, and 2-pixel LVDS).
Here are the main types:
- (1) Single 6-bit LVDS bit interface: Used for 6-bit panels with single-channel RGB transmission. Also referred to as an 18-bit interface.
- (2) Dual 6-bit LVDS interface: Drives 6-bit panels using dual-channel (odd/even pixel) RGB transmission. Known as a 36-bit interface.
- (3) Single 8-bit LVDS bit interface: Supports 8-bit panels with single-channel RGB output. Also called a 24-bit interface.
- (4) Dual 8-bit LVDS interface: Uses dual channels for 8-bit panel RGB output. Referred to as a 48-bit interface.
- (5) Single 10-bit LVDS interface: Transmits full-range RGB (R0R9, G0G9, B0~B9) over one channel for high-fidelity color displays.
- (6) Dual 10-bit LVDS interface: Employs two channels (odd/even pixels) for complete RGB output on premium-grade displays.
These variations provide flexibility in matching display resolution requirements while optimizing performance.
Benefit of LLVDS Interface
High-speed transmission capability
The benefits of using an LLVDS (Low-Level Voltage Differential Signaling) interface are numerous. One of its most significant advantages lies in its exceptional speed capabilities. The LVDS standard in the definition of ANS/EIA/EIA-64 has a theoretical limit rate of 1.923 Gbps. This makes it suitable for high-resolution displays that require rapid frame refresh rates.
Low power consumption characteristics
Another key advantage is energy efficiency. LVDS devices are implemented using CMOS technology, and CMOS can provide lower static power consumption; when the drive current of the constant current source is 3.5mA, the power consumption of the load (100Ω terminal matching) is only 1.225mW; the power consumption of LVDS is It is constant and does not rise with respect to a frequency like the dynamic power consumption of CMOS transceivers.
The power supply voltage is low.
Additionally, it supports modern integration needs thanks to its voltage compatibility. The driver and receiver of LVDS do not depend on specific supply voltage characteristics, which determines its peak in this regard.
Strong anti-noise ability.
Noise immunity is another major strength. The inherent advantage of differential signals is that noise is coupled in a common mode on a pair of differential lines and subtracted in the receiver to eliminate noise, so LVDS has a strong ability to resist common mode noise.
Effectively suppress electromagnetic interference
Electromagnetic interference (EMI) suppression is also noteworthy. Because the polarities of the differential signals are reversed, the electromagnetic fields radiated by them can cancel each other out. This makes it ideal for environments where EMI could compromise system performance.
The timing positioning is accurate.
Accuracy in timing positioning ensures reliable operation at higher speeds. Because the switching change of the differential signal is at the intersection of the two signals. This reduces timing errors compared to single-ended signaling systems.
Adapt to the wide range of ground plane voltage variation
Lastly, it adapts well across varying ground voltages between driver and receiver units. The LVDS receiver can withstand a voltage change of at least ±1V between the driver and the receiver. This tolerance enhances robustness across different hardware setups.
In Conclusion
To recap, LVDS is a specification used to send and receive data with LCDs. It differs from other specifications by leveraging the power of voltage differences. With its combination of high-speed performance, low-power operation, strong noise resistance, EMI suppression capabilities, accurate timing control, and broad voltage adaptability range—LVDS stands out as one of today’s most efficient display signaling technologies.
FAQ
Q: What does an LVDS interface do?
A: It transmits digital video signals using differential signaling that minimizes noise while enabling high-speed communication between display controllers and LCD panels.
Q: Is LVDS better than HDMI or VGA?
A: Each serves different purposes—HDMI offers audio-video integration for consumer electronics while VGA uses analog signals; however, for embedded systems needing fast refresh rates with minimal EMI or power usage—LVDS excels.
Q: Can I convert TTL to LVDS?
A: Yes; converters exist that allow you to adapt TTL-level outputs into compatible LVDS inputs for display integration.
Q: Does screen resolution affect which type of LVDS I need?
A: Absolutely; higher resolution screens often require dual-channel or higher bit-depth interfaces such as dual 10-bit configurations.
looking for LVDS LCD displays manufacturer? contact Miqidisplay today
If you’re sourcing reliable suppliers for your next project involving advanced display modules with integrated lvds interfaces—look no further than Miqidisplay.
Miqidisplay is a trusted provider of advanced display technologies and solutions, offering a comprehensive portfolio including LCD, TFT, IPS, OLED displays, and specialized accessories.
With over two decades of rich professional experience in this field, Miqidisplay delivers both standard products like AUO LCD screens or Raspberry Pi TFT Displays—and fully customized solutions tailored through their expert engineering team.
Over 90% of orders ship within the same day, ensuring fast delivery times globally across more than 200 countries. Their facilities are certified under TS-16949, ISO-9001 & ISO-14001 standards—giving you peace-of-mind regarding quality assurance.
Whether you’re developing industrial control systems or medical imaging equipment—contact Miqidisplay today or explore their extensive product catalog online to get started on your next innovation-driven display solution.