Что такое режим сканирования светодиодного дисплея? Практическое руководство по сканированию 1/4, 1/8, 1/16 и статическому сканированию

Автор: Техническая команда Meitec
Рецензент: Специалист по светодиодным дисплеям
Категория: Основы продукта
Дата последнего обновления: Сентябрь 2026 года

Режим сканирования является распространённой характеристикой в техническом описании модуля светодиодного дисплея, однако это также один из параметров, который покупатели часто понимают неправильно.

Такие термины, как сканирование 1/4, сканирование 1/8, сканирование 1/16, сканирование 1/32 и статическое сканирование, описывают электрический способ управления светодиодами на модуле. Они не описывают напрямую разрешение изображения, частоту обновления или яркость, хотя режим сканирования влияет на эти три аспекта фактических характеристик отображения.

Покупателям, монтажникам и системным интеграторам полезно понимать режим сканирования, поскольку два светодиодных дисплея с одинаковым шагом пикселя и разрешением могут иметь различную архитектуру управления, что приводит к различиям в яркости, энергопотреблении, характеристиках обновления и применении с камерами.

В данном руководстве объясняется, что означает режим сканирования светодиодного дисплея, как работают различные коэффициенты сканирования, как сканирование связано с частотой обновления и градациями серого, а также что следует учитывать при сравнении технических характеристик светодиодных дисплеев.

Что означает режим сканирования на светодиодном дисплее?

Модуль светодиодного дисплея содержит тысячи красных, зелёных и синих светодиодов, управляемых драйверными микросхемами.

Постоянное управление каждым светодиодом через выделенный электрический канал потребовало бы большого количества выходов драйверов и значительно усложнило бы конструкцию модуля.

По этой причине во многих светодиодных дисплеях используется метод, известный как мультиплексное сканирование..

Вместо одновременного постоянного питания всех строк светодиодов система управления разделяет модуль на группы. Эти группы активируются последовательно с очень высокой скоростью.

Человеческий глаз обычно не воспринимает это переключение, поскольку полный цикл сканирования происходит чрезвычайно быстро. Поэтому экран выглядит непрерывно освещённым.

Коэффициент сканирования показывает, какая доля строк светодиодов активно управляется в течение одного шага сканирования.

Типичные примеры включают:

• Статическое сканирование
• Сканирование 1/2
• Сканирование 1/4
• Сканирование 1/8
• Сканирование 1/16
• Сканирование 1/32
• Сканирование 1/64

Подходящая конфигурация сканирования зависит от конструкции модуля, шага пикселя, архитектуры драйверных микросхем, требований к яркости и области применения.

Как работает сканирование светодиодного дисплея?

Упрощённый пример облегчает понимание принципа.

Представьте модуль светодиодного дисплея, пиксели которого разделены на 16 групп строк.

В конфигурации сканирования 1/16, только одна из этих 16 групп активно управляется в течение конкретного периода сканирования.

Драйверная микросхема активирует первую группу, затем вторую, затем третью, продолжая до тех пор, пока не будут адресованы все 16 групп.

После этого процесс начинается заново.

Весь этот цикл повторяется много раз в секунду.

Таким образом, светодиоды не обязательно светятся непрерывно. Вместо этого они получают короткие электрические импульсы, которые возникают достаточно часто, чтобы создать восприятие стабильного изображения.

Такая мультиплексная архитектура сокращает количество требуемых каналов драйверов и позволяет производителям создавать компактные светодиодные модули с высокой плотностью пикселей.

Что означает сканирование 1/4?

Модуль светодиодного дисплея со сканированием 1/4 разделяет свои светодиоды на четыре группы сканирования.

На любом данном шаге сканирования активно управляется примерно одна четверть соответствующих строк светодиодов.

Затем драйвер переключается между четырьмя группами.

По сравнению с более высоким коэффициентом мультиплексирования, таким как сканирование 1/16 или 1/32, сканирование 1/4 обычно позволяет каждой группе светодиодов иметь больше активного времени в течение одного полного цикла сканирования.

Это может способствовать поддержанию более высокой яркости, и это одна из причин, по которой относительно низкие коэффициенты сканирования часто встречаются в наружных светодиодных дисплеях.

Однако фактические характеристики по-прежнему зависят от эффективности светодиодов, драйверных микросхем, настроек тока и конструкции модуля.

Что означает сканирование 1/8?

В конфигурации сканирования 1/8 модуль разделяется на восемь групп сканирования.

Каждая группа получает часть общего времени управления.

Сканирование 1/8 часто встречается в различных модулях светодиодных дисплеев, поскольку оно обеспечивает практичный компромисс между сложностью схемы, яркостью и загрузкой драйверов.

Например, в некоторых конфигурациях наружных светодиодных дисплеев используются коэффициенты сканирования около 1/8 или ниже в зависимости от шага пикселя и конструкции корпуса светодиода.

The scan ratio should therefore be evaluated as part of the module architecture rather than treated as an independent image-quality rating.

What Does 1/16 Scan Mean?

A 1/16 scan module has 16 sequential driving groups.

Compared with 1/4 or 1/8 scanning, each individual group receives a smaller portion of the total scanning period.

Higher multiplexing ratios can reduce the number of driver outputs required for a given number of LEDs, which becomes particularly useful as pixel density increases.

This is why scan ratios such as 1/16, 1/32 or higher are often associated with indoor and finer-pitch LED module designs.

However, a higher scan denominator also places greater demands on the driver system.

The LED driving architecture must maintain sufficient brightness, refresh performance and grayscale precision even though each scanning group has a relatively short active period.

What Is Static Scan?

Static scan is fundamentally different from multiplexed scanning.

In a static-drive configuration, each LED or pixel channel can remain continuously driven rather than sharing driving time among multiple scanning groups.

In simplified terms:

Static scan = 1/1 scan.

This provides a very high duty cycle and can support excellent brightness performance.

Static driving is therefore commonly associated with certain outdoor LED displays where high luminance is particularly important.

The trade-off is that static driving requires more driver channels and additional circuitry compared with multiplexed designs.

For this reason, static scan is not automatically the most appropriate architecture for every LED display.

Module size, pixel pitch, power design, heat dissipation, LED type and total system cost must also be considered.

Scan Ratio and Duty Cycle

Scan mode is closely related to duty cycle.

A simplified way to think about the relationship is:

Lower multiplexing denominator = more available active time per scanning group.

Например:

These percentages help explain the basic concept, but they should not be used to calculate real LED brightness directly.

Modern LED driver ICs use complex current control, PWM timing and blanking behavior. The optical output of a finished display therefore depends on much more than the nominal scan ratio.

Does a Lower Scan Ratio Mean a Brighter LED Display?

It can contribute to higher brightness, but the relationship is not absolute.

For example, a 1/4 scan module gives each scanning group more available driving time than a 1/16 scan module.

Under otherwise similar conditions, this can make it easier to achieve high luminance.

This is one reason outdoor LED displays frequently use relatively low scan ratios.

However, brightness also depends on:

• LED chip efficiency
• LED package type
• Driving current
• Driver IC design
• PCB electrical characteristics
• Power supply configuration
• Heat dissipation
• Calibration settings

A professionally engineered 1/16 scan module can therefore outperform a poorly designed 1/8 scan module.

Scan mode should never be used as the only predictor of display brightness.

Scan Mode vs. Refresh Rate

Scan rate and refresh rate are frequently confused because both describe timing inside the LED driving system.

They are not the same specification.

Scan mode describes how LED rows or groups are multiplexed.

Refresh rate describes how frequently the LED display completes its electronic refresh behavior within one second.

Refresh rate is normally expressed in Hertz, such as:

• 1920Hz
• 3840Hz
• 7680Hz

Scan mode is expressed as a ratio, such as:

• Сканирование 1/8
• Сканирование 1/16
• Сканирование 1/32

Two LED modules can both operate at 3840Hz while using different scanning ratios.

Similarly, two 1/16 scan modules may support different refresh rates depending on their driver ICs and control configuration.

For a more detailed explanation of this distinction, see Meitec’s What Is LED Display Refresh Rate? guide.

How Scan Mode Affects Refresh Performance

Although scan mode and refresh rate are separate parameters, they interact.

During every scanning cycle, the driver IC must complete multiple tasks within a limited amount of time:

• Select the correct scanning row
• Transfer pixel data
• Control LED current
• Generate PWM grayscale
• Manage blanking periods
• Complete enough cycles to maintain the specified refresh rate

As the multiplexing ratio increases, the available timing window for each scanning group becomes shorter.

Achieving high refresh rate together with high grayscale and stable low-brightness performance therefore becomes more demanding.

This is why the quality of the driver IC and module design is particularly important on high-density LED displays.

Simply specifying “3840Hz” does not reveal how successfully the complete driving system performs under real operating conditions.

Scan Mode and Grayscale

Grayscale describes how many brightness levels an LED display can reproduce between black and full brightness.

Typical professional LED displays may specify grayscale depths such as 13-bit, 14-bit, 16-bit or higher processing levels.

Scan mode does not directly determine grayscale depth, but scanning consumes part of the timing available to the driver IC.

At the same time, the driver must generate precise PWM pulses to reproduce different brightness levels.

When timing becomes increasingly constrained, maintaining very fine grayscale performance—especially at low screen brightness—requires better driver architecture.

This matters in applications such as:

• Broadcast studios
• Control rooms
• Corporate presentation spaces
• Virtual production
• High-end rental events
• Fine-pitch indoor displays

These applications should therefore be evaluated using actual image tests rather than scan ratio alone.

Why Are Outdoor LED Displays Often Lower Scan?

Outdoor displays normally require substantially more brightness than indoor displays.

A screen installed on a building façade or roadside billboard must remain visible under strong ambient light and sometimes direct sunlight.

For this reason, outdoor modules often use architectures that provide relatively high LED duty cycles.

Typical configurations may include:

• Static
• Сканирование 1/2
• Сканирование 1/4
• 1/6 scan
• Сканирование 1/8

The exact value depends strongly on pixel pitch and LED technology.

For example, the Meitec MTO Pro outdoor series uses different scan modes across its pixel-pitch range. Current configurations include 1/8, 1/7, 1/6, 1/4, 1/2 and static scanning, illustrating why scan mode should be matched to the module rather than standardized across an entire product family.

Why Do Fine-Pitch LED Displays Often Use Higher Scan Ratios?

Fine-pitch LED displays contain a very large number of pixels in a relatively small physical area.

As pixel pitch becomes smaller, driver density increases dramatically.

Using dedicated static-driving channels for every LED would make module circuitry increasingly complex.

Higher multiplexing ratios allow designers to share driver resources across more LED rows.

As a result, indoor fine-pitch displays may use configurations such as:

• 1/16
• 1/20
• 1/32
• 1/40
• 1/64

The exact architecture varies according to the LED package, PCB, driver IC and manufacturer.

A higher scan denominator should not automatically be interpreted as lower product quality. In fine-pitch LED engineering, it is often a practical consequence of much higher pixel density.

Does Scan Mode Affect Power Consumption?

Scan architecture can influence power-system design, but there is no simple rule saying that one scan ratio always consumes more electricity than another.

Actual power consumption depends on several variables:

• Total number of LEDs
• LED efficiency
• Average picture level
• Display brightness setting
• Driving current
• Common-anode or common-cathode architecture
• Power supply efficiency
• Driver IC losses
• Scan configuration

A lower scan ratio may allow longer LED conduction periods, while higher multiplexing may use different peak-current behavior.

The final measurement should therefore come from the complete module or cabinet rather than being estimated solely from scan ratio.

Does Scan Mode Affect Camera Performance?

Yes, indirectly.

Cameras use short exposure periods that can reveal the internal timing behavior of an LED display.

If a camera captures the screen while different row groups are at different points in their scanning sequence, the recorded image may contain:

• Dark horizontal lines
• Bright bands
• Moving scan lines
• Uneven exposure
• Partial flicker

However, scan mode is only one part of the problem.

Camera performance is also influenced by:

• LED refresh rate
• PWM frequency
• Driver IC
• Camera shutter speed
• Camera frame rate
• Brightness setting
• Synchronization
• Control-system configuration

This is particularly important for rental LED walls used at concerts, exhibitions and live productions, where screens frequently appear on professional cameras and smartphones. Meitec’s Rental LED Display category covers products designed for these temporary event environments.

For camera-critical projects, testing the actual LED module with the intended camera equipment remains more reliable than selecting a display based only on the stated scan ratio.

Is Static Scan Always Better Than 1/16 or 1/32 Scan?

No.

Static scan provides technical advantages in applications where high LED duty cycle is required, but “lower scan ratio” should not be treated as a universal quality ranking.

Consider two hypothetical displays:

Display A:

• P10 outdoor
• Статическое сканирование
• 8,000 nits

Display B:

• P1.25 indoor
• Сканирование 1/32
• 800 nits

The static-scan display is much brighter, but that does not make it a better LED display.

The two products are designed for completely different environments.

The P1.25 screen prioritizes very high pixel density and close viewing distance. The P10 screen prioritizes outdoor visibility.

Both scan architectures can therefore be technically appropriate.

What Scan Mode Should You Choose?

In most cases, buyers should not choose an LED display by specifying the scan ratio first.

Instead, start with the application.

Outdoor Advertising

Prioritize:

• Required brightness
• Environmental protection
• Viewing distance
• Power efficiency
• Thermal performance
• Long-term reliability

Lower scan ratios or static driving are common, but the final configuration should follow the module design.

Indoor Commercial Displays

Prioritize:

• Pixel pitch
• Viewing distance
• Image uniformity
• Grayscale
• Appropriate brightness
• Refresh performance

Moderate or higher multiplexing ratios are normal.

Rental and Stage LED Screens

Prioritize:

• Camera compatibility
• High refresh rate
• Low-brightness grayscale
• Fast installation
• Mechanical reliability

Scan configuration should be evaluated together with the driver IC and camera performance.

Broadcast and Virtual Production

Prioritize the entire imaging workflow.

A datasheet scan ratio is not enough.

Professional evaluation may require:

• Camera tests
• Shutter testing
• High-speed recording
• Genlock verification
• Low-brightness tests
• Grayscale evaluation

What Should Buyers Ask the Supplier?

When reviewing an LED display specification, useful technical questions include:

1. What scan mode does the actual module use?
2. What driver IC is installed?
3. What refresh rate is maintained in the production configuration?
4. What grayscale performance is available at low brightness?
5. Is the stated brightness measured using the same scan configuration?
6. Can the supplier provide camera-test footage?
7. Is the specification based on the standard product or an optional configuration?
8. Will changing refresh or grayscale settings affect brightness?

These questions provide a much more accurate picture of display performance than comparing scan ratios alone.

Common Misunderstandings About LED Scan Mode

“1/8 Scan Is Twice as Good as 1/16 Scan.”

No.

The two ratios describe different multiplexing architectures. They are not quality scores.

“Static Scan Always Produces the Best Image.”

Not necessarily.

Static scan is useful for certain module designs, particularly high-brightness outdoor applications, but fine-pitch indoor displays typically require different driving architectures.

“Scan Rate and Refresh Rate Are the Same.”

No.

Scan rate describes row multiplexing. Refresh rate describes electronic refresh frequency.

“A Higher Scan Ratio Means the Screen Will Flicker.”

Not automatically.

Flicker behavior depends on the complete driver system, including refresh rate, PWM characteristics and control timing.

“You Can Compare Two LED Displays by Scan Ratio Alone.”

No.

Pixel pitch, LED type, brightness, refresh rate, grayscale, driver IC, thermal design, calibration and intended application all need to be evaluated together.

Final Selection Principle

LED display scan mode is best understood as part of the module’s electrical driving architecture.

A lower scan ratio generally gives each LED group a larger portion of the driving period, which can support high-brightness applications.

A higher multiplexing ratio allows more LEDs to share driver resources and is particularly useful as pixel density increases.

Neither approach is automatically better.

The correct scan architecture depends on the balance between:

• Pixel pitch
• Pixel density
• Brightness
• Refresh rate
• Grayscale
• Driver IC capability
• Power consumption
• Camera requirements
• Module complexity
• Application environment

For this reason, professional LED display selection should focus on the performance of the complete module and cabinet rather than one isolated specification.

At Meitec, scan mode is treated as one part of the complete LED driving system. The practical objective is not to achieve the lowest or highest possible scan ratio, but to combine the appropriate module architecture, driver electronics and optical performance for the intended application.

Quick FAQ

What is scan mode in an LED display?

Scan mode describes how groups of LED rows are electrically activated in sequence. Common configurations include static, 1/4, 1/8, 1/16 and 1/32 scan.

What does 1/16 scan mean?

A 1/16 scan module divides the relevant LEDs into 16 scanning groups. Each group is driven sequentially during one complete scanning cycle.

Is 1/8 scan better than 1/16 scan?

Not necessarily. 1/8 scan provides a higher duty cycle, while 1/16 scanning can support higher-density module designs. The appropriate configuration depends on the product and application.

What is static scan?

Static scan, also called 1/1 scan, drives LED channels continuously rather than multiplexing them across multiple scanning groups.

Does scan mode affect LED display brightness?

It can influence brightness because scan ratio affects available LED driving time. However, LED efficiency, current, driver ICs and module design are also important.

Is scan mode the same as refresh rate?

No. Scan mode describes LED row multiplexing, while refresh rate describes how frequently the display’s electronic driving system refreshes each second.

Which scan mode is best for an LED display?

There is no universal best scan mode. Outdoor high-brightness displays often use lower scan ratios, while high-density indoor displays may use higher multiplexing ratios. The complete system performance matters more than the ratio itself.