Ever wondered what makes LED displays so bright and energy-efficient? The secret lies in the LED driver IC—a small but powerful component that controls brightness, color, and performance.
In this guide, we’ll break down how an LED driver IC works, its types, and where it’s used. Additionally, we’ll explore the future trends in LED display driver ICs to give you a glimpse into the advancements shaping this technology.
Table of Contents
1. Current Status of the LED Display Industry
2. Understanding LED Driver IC
3. Types of LED Display Driver ICs
4. Applications of LED Display Driver ICs
5. NovaStar PWM & PAM LED Driver IC
6. TBS Driver Chip Introduction
7. NovaStar End-to-End Driver IC Solutions
1. Current Status of the LED Display Industry
LED displays are everywhere, but they’re not without their flaws. Many struggle with dim visuals, poor visibility in sunlight, and lost details, leaving viewers underwhelmed.
High power consumption, overheating, and insufficient peak brightness make matters worse. The result? Displays that fail to capture the true brilliance of natural scenes, turning sunny days into dull, overcast impressions.
1.1 Challenges in the LED Driver IC Market
Why do LED displays often fall short? The core issue lies in the LED driver IC. Overheating, high energy use, and inconsistent brightness are major roadblocks to achieving stunning visuals.
But the industry is fighting back. Advanced LED driver ICs are stepping up, offering solutions like better thermal management, higher efficiency, and precise brightness control. These innovations are key to overcoming today’s display challenges.
1.2 Changes in Leading LED Display Manufacturers
How are top manufacturers tackling these challenges? They’re turning to next-gen LED driver ICs to revolutionize display performance.
By integrating smarter, more efficient technologies, they’re creating displays that shine brighter, run cooler, and use less power. The goal? To deliver visuals so vivid and true-to-life, they leave audiences in awe—rain or shine.
a. Measured Data
Brand: Samsung The Wall
Resolution: 3840*2160
Number of light panels: 16*12
Light panel resolution: 240*180
Pixel pitch: P0.63mm
Packaging: COB packaging
b. Measuring Tools
(1) Brightness test
Test method: 10% white block 255 grayscale
Full white screen brightness: 295.62nit
Peak brightness: 1314.77nit
With dynamic peak brightness function
(2) Refresh rate test
Test method: Select 4 typical grayscale tests. The measurement area is a 1024*1024 pixel white block with a black background.
Test date
Grayscale | Brightness | Refresh Rate |
255 Grayscale | 499.7411nit | 1920Hz |
128 Grayscale | 184.3012nit | 1080Hz |
32 Grayscale | 3.3015nit | 120Hz |
10 Grayscale | 0.0025nit | 1380Hz |
Note: The brightness at 10 grayscale levels is too low, causing abnormal waveform separation on the testing instrument.
The refresh rate is the same as regular displays on the market, but the visual refresh rate decreases significantly at low grayscale levels.
(3) Power consumption test
Test method: Use PA310 255 full screen, test at 295.62nit brightness for 5 minutes
Full screen power consumption: 76.64Wh
ABL function makes white screen power consumption extremely low
(4) Uniformity test
Test method: 9-point test method
Uniformity data | Ordinary screen | |||
| Brightness | Chroma | Brightness | Chroma |
W | 98.57% | 0.0017 | 98.57% | 0.0009 |
R | 97.81% | 0.0002 | 98.46% | 0.0001 |
G | 98.70% | 0.0032 | 98.99% | 0.0018 |
B | 98.80% | 0.0007 | 99.25% | 0.0004 |
Calculation formula: △U’V’
The uniformity is lower than that of ordinary displays on the market, and the R brightness and G chromaticity deviation are larger.
(5) Color temperature test
Test method: 1~255 grayscale, using CA410 to test the color temperature of each grayscale
Average color temperature after stabilization: 12197K
Average white balance coordinates: Cx, Cy (0.2702, 0.2719)
The temperature deviation of low gray is large, and it tends to be stable after 20 gray levels.
(6) Color gamut test
Test method: Use CA410 to test R, G, B coordinate values
| Color Gamut | Gamut Matching Rate | Gamut Utilization Rate |
| Rec.709 | 100% | 64.63% |
| DCI-P3 | 97.20% | 85.22% |
| Rec.2020 | 81.74% | 99.89% |
Conventional display screen DCI-P3 color gamut matching rate is about 90%. Compared with conventional displays on the market, the DCI-P3 color gamut matching rate is high.
(7) Subjective perception of the human eye
The picture is bright, with obvious layers, and the color saturation is high when playing natural pictures;
Pure color observation, uniformity is general, and there are large differences between modules;
Change the video source content to full-screen pure color, the brightness is automatically reduced, which is comfortable for the human eye and will not cause stimulation due to high brightness.
Summary
The dynamic peak brightness function makes The Wall more stunning when playing natural images;
With the ABL function, The Wall automatically limits the brightness to 300nit when switching to a full white image, which consumes less power and is more comfortable for the human eye to watch;
Narrow wavelength light makes The Wall more compatible with standard colors in color performance, and the color reproduction is more realistic;
The refresh rate, uniformity, and low gray temperature stability are similar to or even lower than those of conventional monitors on the market.
2. Understanding LED Driver IC
The LED driver IC is the unsung hero behind every vibrant display, controlling brightness, color, and efficiency. Without it, even the best screens would fall flat.
Let’s break down how it works and why it’s so crucial for stunning visuals.
2.1 What is an LED Display Driver IC
An LED display driver IC is a specialized chip designed to control and power LED displays. It regulates the current and voltage supplied to each LED, ensuring consistent brightness, accurate colors, and efficient energy use.
Think of it as the brain behind the display—without it, even the best LEDs couldn’t shine as brightly or last as long. It’s what makes modern displays so stunning and energy-efficient.
2.2 Importance of LED Display Driver ICs
LED display driver ICs are essential for modern displays, ensuring they perform at their best. Here’s why they’re so important:
(1) Brightness Control
They maintain consistent brightness, making displays clear in any lighting.
(2) Color Accuracy
They ensure colors look vibrant and true to life.
(3) Energy Efficiency
They reduce power usage, saving energy and costs.
(4) Thermal Management
They prevent overheating, extending the display lifespan.
(5) Reliability
They ensure stable performance, even in demanding conditions.
(6) Flexibility
They enable features like dimming and dynamic effects for creative designs
In short, LED display driver ICs are the key to brighter, smarter, and more efficient displays. Without them, today’s visual experiences wouldn’t be possible.
2.3 How Does an LED Driver IC Work?
An LED driver IC is the core component that powers and controls LEDs, ensuring they operate efficiently and consistently. It manages the flow of electricity to deliver optimal performance.
Here’s how it works:
The LED display driver chip provides stable current and voltage to the LEDs, ensuring they light up properly. By adjusting parameters like output current and refresh rate, the display’s brightness, uniformity, and refresh performance can be improved during testing.
The control chip handles data processing and transmission, enabling various display effects. Tuning the chip helps achieve better screen performance during debugging.
The decoder chip converts input address signals into specific row or column control signals. This helps the controller accurately manage each pixel on the LED screen.
During testing, checking the decoder chip’s output helps verify if it’s working properly and can help fix display issues caused by decoding errors.
Decoding Process:
Input signals are usually digital signals in serial or parallel form. These signals carry the display data, such as characters or pixel values for images.
Signal decoding is done inside the chip, converting digital codes into physical signals. This tells each LED when to turn on, how bright, or what color to show.
Gray level control is used for displays with brightness levels. The decoder turns digital signals into PWM (pulse-width modulation) signals to control brightness by changing the duty cycle.
Output signals go to the LED driver circuit, which controls the LEDs. This is how images and text appear on the screen.
3. Types of LED Display Driver ICs
LED display driver ICs come in various types, each designed for specific applications and performance needs. Here’s a quick overview:
(1) Constant Current LED Driver ICs
Maintain a steady current flow to LEDs, ensuring consistent brightness and color.
Ideal for high-brightness applications like outdoor LED billboards and automotive lighting.
(2) Constant Voltage LED Driver ICs
Provide a fixed voltage to LEDs, often used in low-power applications.
Commonly found in indoor LED displays and decorative lighting.
(3) PWM (Pulse Width Modulation) LED Driver ICs
Control brightness by rapidly switching LEDs on and off, offering precise dimming.
Perfect for dynamic lighting effects in stage lighting and architectural displays.
(4) Digital LED Driver ICs
Use digital signals for advanced control, enabling features like programmable patterns and IoT integration.
Best suited for smart lighting systems and high-end commercial LED displays.
Each type has its strengths, making it essential to choose the right LED Driver IC for your specific application.
4. Applications of LED Display Driver ICs
Behind every vibrant display and efficient lighting system lies a critical component: the LED driver IC.
These small but mighty chips are the driving force behind a wide range of technologies, enhancing how we interact with light and visuals. Here’s where they play a key role:
(1) Consumer Electronics
Smartphones, Tablets, and Laptops: They ensure screens are bright, energy-efficient, and color-accurate.
TVs and Monitors: They deliver stunning visuals with smooth brightness adjustments.
(2) Automotive Lighting
Headlights and Taillights: They provide reliable, high-performance illumination for safety and style.
Interior Lighting: They create customizable ambient lighting, enhancing the driving experience.
(3) Commercial and Advertising Displays
LED Billboards and Signage: They power bright, durable displays that stand out in any environment.
Retail Displays: They help create captivating visuals to attract and engage customers.
(4) Industrial Lighting
Factory and Warehouse Lighting: They ensure robust performance in demanding conditions.
High-Bay Lighting: They deliver efficient, long-lasting illumination for large spaces.
(5) Smart Lighting and IoT
Smart Home Lighting: They enable personalized lighting scenes and energy-saving features.
Commercial Smart Lighting: They integrate with building systems to optimize energy use and comfort.
(6) Entertainment and Events
Stage Lighting: They support dynamic effects and precise control for unforgettable performances.
Architectural Lighting: They highlight buildings and landscapes with breathtaking visuals.
From the screens we use daily to the lights that shape our cities, LED Driver ICs are quietly revolutionizing the way we see the world. Their impact is everywhere—brightening lives, one LED at a time.
5. NovaStar PWM & PAM LED Driver IC
When it comes to precision and efficiency in LED displays, Novastar’s PWM (Pulse Width Modulation) and PAM (Pulse Amplitude Modulation) technologies stand out.
Let’s dive into how these technologies work and why they’re a game-changer for modern LED applications.
5.1 Basic Principles of PWM+PAM Regulation
It’s a seamless flow: Signal → Sending Card → Receiving Card → Driver IC → Display, turning data into stunning visuals.
Summary:
Taking full advantage of the high brightness of LED, the COB display screen easily exceeds 1000nit;
The graying is lower, the highlight is brighter, and the contrast is improved by an order of magnitude;
Combined with the system MG algorithm, it is dark when it should be dark and bright when it should be bright, which is more energy-saving and more eye-friendly;
Lower driving current prolongs the service life of LED lamp beads.
5.2 Full-Link Algorithm Collaborative Processing to Improve Display Quality
By combining MG algorithm, peak brightness optimization, and dynamic energy saving, the full-link system ensures displays are brighter, more efficient, and visually stunning—all while reducing power consumption.
The peak brightness feature intelligently analyzes video source data in real-time, enabling frame-by-frame, pixel-by-pixel brightness adjustments. This enhances the display’s dynamic range, delivering higher contrast and smoother grayscale performance.
Meanwhile, dynamic energy saving reduces power consumption by up to 50% in black screen states and over 20% in lit screen states, making displays not only stunning but also energy-efficient.
5.3 Comparison of Common COB Display Test Data
Bigger screens need more pixels to stay sharp. If the screen gets larger without adding more pixels, the image can look stretched or blurry.
| Test cabinet | P0.93 real pixel 54S COB cabinet | ||
| Effect performance | 5267 | 2XX9 | Effect comparison |
| Maximum brightness/nit | 600 | 600 | – |
| Peak brightness/nit | 1200 | 600 | Brightness increased by 600nit |
| Graying brightness/nit | 0.0071 | 0.0091 | Lower graying |
| 1200nit peak brightness contrast ratio | 169049：1 | 65934:1 | 2.5 times |
| White screen cabinet power consumption W/m2 | 310 | 340 | 8.5% lower |
| Black screen cabinet power consumption W/m2 | 47 | 98 | 51% lower |
| Grayscale | 32768（15bit） | 8192（13bit） | 4 times |
| Video cumulative/KWh (6H) | 0.204（1200nit） | 0.252（600nit） | 19% lower |
| Temperature | 36.7℃ | 39.8℃ | 3.1℃ lower |
Conclusion
(1) With a white screen brightness of 600 nits, the peak brightness can reach 1200 nits, increasing the contrast ratio by 2.5 times；
(2) At 600 nits white screen brightness, black screen power savings reach 51%；
(3) At a peak brightness of 1200 nits, the cumulative video power consumption is over 19% lower than similar products；
(4) Gray scale levels have increased from 13-bit to 15-bit, improving by four times；
(5) The average module temperature is 3.1℃ lower than competing products.
5.4 High Refresh Rate Combination
TBS5367, paired with A10s Pro and MX40 Pro, supports a 1-bit grayscale at 240Hz refresh rate and a refresh rate of ≥15,000Hz.
(1) System configuration:
Controller: MX40 Pro
Receiver card: A10s Pro
Frame rate output: 240Hz
(2) Specifications of the tested display:
Type: SMD
Dot pitch: P1.95
Number of scans: 8s
Visual refresh rate: 15360Hz
Driver IC model: TBS5367
Grayscale bit level: 18bit
(3) Test environment:
Test instrument model: LM-AST-10MM
(4) Test method:
Using the LM-AST-10MM device with LLide software for testing.
The LM-AST-10MM is placed directly against the screen (module center), and LLide is used to read and record the number of peak brightness occurrences (open instances).
The recorded number is then multiplied by 60 to calculate the refresh rate.
| Driver IC model | Supported PAM bit number | 16 scans or less | 20 scans or less | 20-45 scans | 45 scans or more |
| TBS5367 | 8bit | ≥18bit @7680~15000Hz | ≥18bit @7680~15000Hz | ≥16bit @7680Hz | ≥16bit @3840Hz |
| TBS5266A | 4bit | ≥16bit @7680~15000Hz | ≥16bit@ 7680Hz | ≥14bit @3840Hz | |
Test Conclusion:
(1) The display’s maximum brightness reaches 1308 nits. At 1 nit brightness, the visual refresh rate is 1740Hz;
(2) At 10 nits brightness (39 grayscale levels), the refresh rate reaches 3840Hz;
(3) At 20 nits brightness (52 grayscale levels), the refresh rate reaches 7680Hz;
(4) At 40 nits brightness (67 grayscale levels), the refresh rate reaches 15,360Hz.
5.5 Comparison of the Temperature of the General COB Screen
P0.93 Real Pixel COB, 54-Scan Module:
Under the same power supply and testing conditions, with the same maximum brightness of 600nit (and a peak brightness of 1200nit), after playing the same video for 6 hours, the screen temperature is 3.1°C lower than that of competing products, meeting the cool screen standard (≤37°C).
Through full-link image processing via the sending card, receiving card, and hybrid PWM+PAM driver, the LED display achieves the “Four Highs and Two Lows”:
6. TBS Driver Chip Introduction
TBS IC Chip Features
| Feature | TBS3266A | TBS5266A | TBS5266B (TBS3266) | TBS5267A | TBS5367A |
| Channels | 16 | 16 | 16 | 16 | 48 |
| Driving Method | PWM + PAM | PWM + PAM | PWM + PAM | PWM + PAM | PWM + PAM |
| PWM Resolution | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Pixel PAM | 4-bit | 4-bit | 4-bit | 4-bit | 8-bit |
| SRAM | Embedded | Embedded | Embedded | Embedded | Embedded |
| Scan Mode | 1-64 | 1-64 | 1-64 | 1-64 | 1-60 |
| Current Accuracy | ±1.5% between chips/channels | ±1.5% between chips/channels | ±1.5% between chips/channels | ±1.5% between chips/channels | ±1.5% between chips/channels |
| Low Turn-On Voltage | 0.36V @ 3.2mA, 0.37V @ 6.4mA | 0.36V @ 3.2mA, 0.37V @ 6.4mA | 0.36V @ 3.2mA, 0.37V @ 6.4mA | 0.27V @ 3.2mA, 0.33V @ 6.4mA | 0.27V @ 3.2mA, 0.33V @ 6.4mA |
| Dynamic Energy Saving | No | Yes | No | Yes | Yes |
| Open/Short Circuit Detection | Yes | Yes | Yes | Yes | Yes |
| Pixel-Level Low-Gray Control | No | No | No | Yes | Yes |
| Data Transmission | Dual-Edge, Max 25 MHz | Dual-Edge, Max 25 MHz | Dual-Edge, Max 25 MHz | Dual-Edge, Max 25 MHz | Dual-Edge, Max 25 MHz |
| Package | SSOP 24 | SSOP 24, QFN 24 | SSOP 24 | SSOP 24, QFN 24 | QFN 88 |
| Design Type | Common Anode | Common Anode | Common Anode | Common Cathode | Common Cathode |
6.1 TBS3266A
Features
- Improved low-gray uniformity;
- Corrected low-gray red tint issue;
- Eliminated first-row dimming;
- Removed ghosting;
- Eliminated open-circuit cross pattern.
6.2 TBS5266A
(1) Energy-saving
Approximately 20% dynamic energy-saving at the pixel level, and around 40% power saving in black screen mode;
(2) High refresh rate
Achieves up to 7680Hz with a 45-scan design;
(3) High grayscale:
2-3 bits higher grayscale than similar products on the market;
(4) High contrast
Pixel-level peak brightness adjustment to enhance dynamic contrast;
Benchmark products: MBI5264
6.3 TBS5266B (New Name TBS3266)
(1) High Refresh Rate
Achieves up to 7680Hz under a 45-scan design;
(2) High Contrast Ratio
Pixel-level peak brightness adjustment enhances dynamic contrast;
(3) High Grayscale
Offers 2~3 bits higher grayscale compared to products of the same specification on the market;
Benchmark products: ICND2065; ICND2153
6.4 TBS5267A
(1) Common Cathode Design & Hybrid Driving – 16-channel architecture with PWM + PAM for improved grayscale.
(2) High-Resolution Control – Supports up to 16-bit PWM and 4-bit Pixel PAM for enhanced performance.
(3) Built-in SRAM – Adaptable to 1–64 scan configurations for flexible applications.
(4) High-Precision Current Control – ±1.5% variation between chips and channels for consistent output.
(5) Dynamic Energy-Saving – Minimizes unnecessary power consumption for efficiency.
(6) Open/Short Circuit Detection – Prevents cross artifacts, bottom ghosting, and first-row dimming.
6.5 TBS5367A
(1) PWM+PAM Driving Method – 16-bit PWM + 8-bit PAM for precise brightness control.
(2) Pixel-Level Calibration – Ensures accurate low-gray performance and eliminates color distortion.
(3) Dynamic Energy-Saving – Reduces unnecessary power loss while maintaining display quality.
(4) Open/Short Circuit Detection – Prevents cross patterns, ghosting, and first-row dimming issues.
(5) Dual-Edge Data Transmission – Supports up to 25MHz for high-speed performance.
7. NovaStar End-to-End Driver IC Solutions
7.1 Conventional Receiver Card + TBS3266A
Application scenarios: outdoor and semi-outdoor
a. Higher Brightness
Higher brightness allows the display content to remain clear even in complex ambient lighting conditions, while also further enhancing the static contrast of the display.
b. Lower Power Consumption in Black Screen Mode
With the control system analyzing the input source in real time, when a continuous black screen is detected, the driver IC automatically shuts down internal modules and enters a silent state.
Once the signal reappears, it wakes up instantly. Compared to conventional displays on the market, the black screen power-saving effect can reduce energy consumption by approximately 50%.
7.2 Conventional Receiver Card + (TBS5266A+TBS5267A)
a. Higher Dynamic Contrast Ratio
Based on the PWM + PAM control method, the display achieves lower gray-onset brightness and higher peak brightness, enabling a contrast ratio of up to 169,014:1.
b. Higher Grayscale Bit Depth
With a higher grayscale bit depth, the display can render content with greater detail. When the panel is designed for 54 scans or fewer, the grayscale bit depth remains above 15 bits.
c. Lower Than Human Body Temperature
During normal video playback, the display operates in low-power mode, ensuring the surface temperature remains lower than human body temperature.
d. Higher Refresh Rate
Using the PAM modulation method, the display achieves a higher refresh rate at high brightness levels, reaching 7680Hz under a 32-scan design.
e. Multiple Low-Power Modes
Through specialized driver IC internal processing, the display achieves pixel-level and driver-level power savings, working in conjunction with the control system to enable low-power operation during black screen states.
7.3 Conventional Receiver Card + TBS5367A
a. Higher Dynamic Contrast Ratio
Utilizing the PWM + PAM control method, the display achieves lower gray-onset brightness and higher peak brightness, delivering a contrast ratio of up to 169,014:1.
b. Higher Grayscale Bit Depth
With an increased grayscale bit depth, the display can render content with exceptional detail. When the panel is designed for 54 scans or fewer, the grayscale bit depth remains above 15 bits.
c. Higher Refresh Rate
By employing PAM modulation, the display achieves a higher refresh rate at high brightness levels, reaching 7680Hz under a 32-scan design.
d. Higher Refresh Rate at Low Brightness
Using PAM modulation, the display maintains a flicker-free refresh rate even at low brightness levels of 1 nit, ensuring a comfortable viewing experience for the human eye.
PWM+PAM Hybrid Driver Chip and Line Management Product List
| Product Series | Model Number | Product Type | Polarity | Channels | Scan Count |
| High Integration Performance | 5367 | Row + Column | Common Cathode | 48 | 20×3 |
| Package-Compatible High Performance | 3266 | Column Driver | Common Anode | 16 | 64 |
| 5266A | Column Driver | Common Anode | 16 | 64 | |
| 5266B | Column Driver | Common Anode | 16 | 64 | |
| 5267 | Column Driver | Common Cathode | 16 | 64 | |
| Row Driver | 2008 | Row Driver | Common Anode | 8 | |
| 2009 | Row Driver | Common Cathode | 8 | ||
| 3008 | Row Driver | Common Anode | 16 | ||
| 3009 | Row Driver | Common Cathode | 16 |
8. Future Trends in LED Display Driver ICs
As LED display technologies continue to evolve, the demand for more advanced and efficient driver ICs is growing rapidly. Here are some key future trends shaping the development of LED display driver ICs:
(1) Higher Integration
Development of compact, multifunctional driver ICs to support advanced and complex LED display designs.
(2) Enhanced Power Efficiency
Adoption of dynamic power-saving technologies and low-power modes to minimize energy consumption.
(3) Improved Grayscale and Color Accuracy
Use of higher bit-depth PWM (e.g., 16-bit+) and advanced modulation techniques for superior image quality.
(4) Higher Refresh Rates
Increasing refresh rates (e.g., 7680Hz+) to enable smoother video playback and eliminate flickering.
(5) Advanced Thermal Management
Innovations in thermal control to reduce operating temperatures and improve reliability.
(6) Smart and Adaptive Features
Integration of intelligent systems for real-time adjustments, defect detection, and adaptive performance.
(7) Miniaturization and Flexible Designs
Continued reduction in package size (e.g., QFN, SSOP) to support compact and flexible display solutions.
(8) Sustainability and Eco-Friendly Practices
Focus on eco-friendly materials, manufacturing processes, and energy-efficient designs.
9. Conclusion
Whether it’s a massive outdoor sign or a sleek smart device, the LED driver IC is what keeps displays vibrant and efficient. Choosing the right LED display driver IC can make all the difference in your project’s success.
Ready to upgrade your display game? Dive into the world of LED driver ICs and see the impact for yourself!
