Question

Which is cheaper, the static driver or the scanning driver for LED display?

Answer 1

Static drive is cheaper than scan drive.

Answer Analysis:

Cost Difference

Scan drive achieves display by time-sharing multiplexing row control circuits. This results in a more complex hardware structure and requires additional row control circuitry. Static drive, on the other hand, drives each pixel independently, eliminating the need for control circuitry and resulting in lower hardware costs.

Other Influencing Factors

Although static drive is less expensive, it requires higher power consumption and a more complex heat dissipation design to maintain continuous power. In practical applications, cost, power consumption, and brightness requirements must be balanced based on the specific scenario.

Static drive for LED displays is a driving method that provides independent power and control signals to each LED pixel. In static drive, each pixel has its own driver circuit, allowing for independent brightness and color control. This method achieves high brightness and precise color control, making it suitable for applications requiring high-quality display quality.

LED scan drive is another driving method that drives LED pixels by grouping them in rows or columns. In scan drive, LED pixels are divided into multiple groups and refreshed row or column by row using a rapid scanning process. The on/off state of each pixel is controlled by the driver circuit within a specific time period. Scan drivers require fewer driver circuits and fewer pins, making them suitable for applications requiring higher refresh rates and larger display areas.

The difference between the two lies in their driving and refresh methods. Static drivers provide independent power and control signals to each pixel, enabling independent brightness and color control. Scan drivers, on the other hand, use time-division multiplexing to drive pixels in groups, either rows or columns, and rapidly refresh to achieve image display. Static drivers are suitable for applications requiring high brightness and color control, while scan drivers are more suitable for applications requiring higher refresh rates and pin counts.

Answer 2

The scanning drive method for LED displays is cheaper than the static drive method. A detailed analysis is as follows:

1. Cost Comparison:

Static drive uses "point-to-point" control, with each pixel equipped with an independent driver circuit, eliminating the need for row control circuits. This design results in higher hardware costs. For example, when using the MBI5026 chip, static virtual drive requires 32 chips, while dynamic half-scan virtual drive only requires 16 chips.

Scan drive achieves time-sharing multiplexing through "point-to-column" control, significantly reducing the number of driver ICs. For example, a quarter-scan method requires only eight MBI5026 chips, reducing hardware costs by approximately 75%.

2. Factors Influencing Price:

The high cost of static drive is directly reflected in the end-user price. Taking a P2.5 indoor full-color screen as an example, static drive products generally range from 3,000 to 10,000 yuan per square meter, while dynamic scanning products can be as low as 2,000 to 5,000 yuan per square meter.

Scan drive technology uses row control circuits to achieve time-sharing lighting. While this requires additional control chip costs, the overall hardware cost is still 30%-50% lower than static drive technology.

3. Market Pricing Patterns:

Industry data shows that the average price of scan drive displays is approximately 40% lower than that of static drive displays of comparable specifications. For example, an outdoor P10 monochrome display using a scan drive can be priced in the low 1,000 RMB range, while a static drive version costs double that.

High-end fine-pitch products (e.g., P1.5 and below) utilize static drive technology at a high rate, but the unit price of these products generally exceeds 10,000 RMB per square meter, further demonstrating the cost disadvantage of static drive technology.

4. Technical and Economic Analysis:

Scan drive technology sacrifices some display quality (such as brightness loss) in exchange for cost advantages, making it significantly more cost-effective in indoor environments where brightness requirements are low.

Although static drive technology offers superior display quality, the cost increase (often exceeding 50%) is disproportionate to the improvement in display quality, resulting in a reduced price-performance ratio.

Answer 3

Scanning LED displays are generally more economical than static driving. This is because scanning activates pixels on the screen through a "row-by-row" or "column-by-column" approach, rather than configuring a separate driver circuit for each pixel.

This reduces the number of driver circuits required while maintaining a certain display quality, thereby lowering cost and power consumption.

In contrast, static driving requires a separate driver circuit for each pixel, which significantly increases cost and power consumption when the number of pixels is large.

Therefore, scanning driving is often a more suitable option for applications that require cost and energy efficiency.

However, the choice of driver method should also be considered in light of other factors, such as display quality, required brightness, and refresh rate. For demanding display quality, a trade-off between cost and performance may be necessary.

Answer 4

Static drive is a driving method for LED displays in which each LED or pixel continuously receives a drive signal.

As long as the displayed content remains unchanged, the LED remains on or off, eliminating the need for time-sharing refreshes required by dynamic scanning. In this method, all rows or the entire display area are driven simultaneously, and the LEDs are in a continuously emitting state, achieving high brightness, high refresh rates, high grayscale levels, and excellent display stability.

It effectively avoids the flicker, streaking, and uneven brightness problems caused by scanning, making it particularly suitable for fine-pitch and micro-pitch displays or indoor high-definition displays with extremely high image quality requirements.

However, because each LED requires an independent or continuous drive current, static drive consumes relatively high power, placing higher demands on the driver IC's load capacity and heat dissipation design, and the cost is generally higher than dynamic scanning drive methods with 1/4 or 1/8 the cost. Despite this, with technological advances and increased IC integration, static drive is becoming increasingly widely used in high-end LED displays, becoming a key technology for ensuring smooth images, accurate color reproduction, and long-term viewing comfort.

Its core advantage lies in constant current and constant brightness output, ensuring consistent and reliable display effects.

Answer 5

LED display scanning technology displays images by controlling pixel selection and brightness. It can be categorized into static scanning and dynamic scanning. Static scanning uses a dedicated driver IC for each LED pixel, achieving point-to-point control.

This offers high brightness, good stability, and flicker-free display, but is more expensive and suitable for high-quality displays such as large outdoor advertising screens. Dynamic scanning uses time slicing to activate pixels row or column by row, using driver ICs for time-sharing multiplexing.

This technology offers advantages such as low cost, low power consumption, and support for large displays, but its display quality and brightness are slightly inferior to static scanning.

It is therefore suitable for close-up viewing scenarios such as indoor shopping guides and home theaters. Both methods utilize high-speed refresh rates (typically ≥60Hz) to avoid visible flicker.

The choice should be based on a comprehensive consideration of display requirements, cost budget, and viewing distance.