T-PWM

Ltech introduced a new technology standard with the introduction of its 0.1% depth flicker free LED drivers—achieving a level of visual comfort and performance that remains unsurpassed in the industry.

Now, after further development and R&D, LTECH is once again pushing the boundaries with T-PWM Super Depth Dimming Technology—a breakthrough innovation set to shape the future of LED dimming for the next decade.

Before looking at what makes T-PWM so revolutionary, let’s review some existing dimming technologies and explain why they fall short—especially at low brightness levels.

T-PWM-image

Dimming Inputs vs Dimming Quality

In commercial LED lighting, we often hear terms like:

  • DMX, DALI, 0/1–10V, Triac, Wi-Fi, Bluetooth, RF, Zigbee

While these are essential components in any lighting setup, they refer to the input signal protocols—not the dimming method itself. These protocols are chosen based on installation conditions, wiring constraints, functionality, and cost—not dimming performance.

The true quality of LED dimming is determined by the driver’s output dimming method, not the input signal.

Understanding Existing Output Dimming Model

1. CCR (Analog Dimming / Constant Current Reduction)

CCR works by linearly adjusting the current that passes through the LED. In theory, LED brightness is proportional to the current. This method:

  • Provides stable, flicker-free dimming at high brightness

  • Struggles with narrow dimming range and poor multi-driver consistency at low levels

2. PWM (Pulse Width Modulation)

PWM adjusts brightness by turning the LED on and off at high frequency—changing the ratio of “on time” to “off time” to simulate dimming. This approach:

  • Enables precise control

  • Suffers from visible flicker at low brightness

  • Is problematic in video shooting, where flicker can become clearly visible

3. CCR + PWM Hybrid

Some manufacturers combine CCR and PWM:

  • CCR handles high brightness

  • PWM takes over at low levels to extend the dimming range

However, this hybrid still inherits limitations from both systems and doesn’t fully solve the flicker and consistency challenges—especially when perceived brightness is more important than measured output.

Bar chart comparing four LED dimming technologies on dimming depth, flicker free LED dimming performance, and camera compatibility. LTECH T-PWM scores highest in all categories, while PWM scores lowest in camera compatibility.

Here’s a visual explainer comparing different LED dimming technologies across three key performance metrics:

  • Dimming Depth (%): How low the system can dim effectively

  • Flicker-Free Performance (%): Stability across the dimming range

  • Camera Compatibility (%): Suitability for video and photography

As shown, LTECH’s T-PWM Super Depth flicker free LED drivers lead in all categories, particularly in ultra-deep dimming and flicker-free operation—making it the top choice for professional lighting and content creation environments.

What is a good dimmable driver

Dimming does not affect the LED colour temperature

Wide dimming range, dimming depth <1%, can integrate with control technology

The image is completely blank with a plain white background and no visible objects, text, or graphics.

No apparent visible flicker. Uniform and smooth flicker free LED driver performance

No ripple or flicker when shooting with with cameras and other photographic equipment

The image is completely blank with a white background and no visible objects, text, or features.

Exceeds established industry standards

Why Low Brightness Is So Difficult

 

The human eye is most sensitive to light fluctuations at low brightness levels. In environments where mood, atmosphere, or darkness are key – such as theatres, hotels, or homes – the lighting must feel smooth and stable, even below 1%.

While many PWM-based drivers have attempted to optimise this with better hardware and software, very few can deliver a wide, deep, and truly flicker free dimming curve all the way down to near-darkness.

A graph comparing brightness measurement and brightness perceived, with shaded areas showing 1% architectural dimming, 5% high performance dimming, and 10% light management dimming categories.

Enter LTECH T-PWM Super Depth Dimming

LTECH’s T-PWM (Transformative PWM) flicker free LED drivers use a next-generation dimming technology designed specifically to overcome the limitations of traditional dimming methods. They provide:

  • 0.01% ultra-deep dimming with high precision

  • Flicker free dimming performance across the entire range, including ultra-low brightness

  • Comfortable, smooth visual transitions, free of banding or strobing during filming

  • Compliance with professional-grade stroboscopic standards—ensuring safety, comfort, and suitability for camera work

Perfect for Content Creation

T-PWM is especially valuable in any application where lighting appears on camera:

  • Retail displays and showrooms

  • Advertising, events, and exhibitions

  • Architecture and interior design photography

  • Broadcast studios and livestream setups

By eliminating flicker even under high-speed or slow-motion shooting conditions, LTECH’s flicker free LED drivers preserve true colour, reduce editing complexity, and ensure flawless visual consistency.

More Than Just Technology—A Better Experience

Thanks to custom algorithms and precisely matched hardware, T-PWM flicker free LED drivers deliver:

  • Stable, flicker free light output

  • Seamless transitions at every brightness level

  • A lighting experience optimised for human vision, not just test equipment

LTECH has also benchmarked its solution against leading global brands to demonstrate its superior output at both ends of the dimming curve.

A rectangular white SE-W1D Series 10-12W LED driver labeled "LTECH," with certification marks, technical specs printed on its surface, and mounting holes at both ends.

Looking Ahead

T-PWM Super Depth Dimming isn’t just a technical upgrade—it’s a shift in how flicker free LED dimming is experienced. LTECH remains committed to pushing technical boundaries and delivering high-quality drivers and intelligent controls that meet the real-world demands of designers, installers, and end-users alike.

As lighting continues to merge with architecture, content, and digital environments, technologies like T-PWM ensure that every lumen works harder, looks better, and feels smoother.

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