Screen Refresh Rate
Overview
The screen refresh rate refers to how many times per second the display updates its image, measured in hertz (Hz). For example, a refresh rate of 60 Hz means the screen refreshes 60 times per second. In body cameras, although the screen is not the primary display for media consumption, the refresh rate still plays a key role in ensuring smooth visuals, clear previews, and a stable user interface—especially during live monitoring and playback.
1. Common Refresh Rate Specifications
| Refresh Rate | Description | Application Context |
|---|---|---|
| 30 Hz | Basic level; minimal smoothness | Simple UI screens, low-power or monochrome displays |
| 50 Hz | Region-specific compatibility (PAL systems) | May reduce flickering under certain lighting |
| 60 Hz | Standard for most embedded LCDs/OLEDs | Provides smooth enough operation for preview/playback |
| 90+ Hz | High refresh rate; not common in body cameras | Used in advanced UIs or high-end consumer electronics |
2. Impact on Display Performance
- Smoothness of Motion
A higher refresh rate results in smoother transitions during menu navigation, video preview, and playback, reducing perceived stutter or lag. - Flicker Visibility
A refresh rate too low may increase the likelihood of visible flicker, especially when viewed under fluorescent or LED lighting or captured on another camera. - Power Consumption
Higher refresh rates can increase power draw, which is a consideration in battery-powered devices like body cameras. - PWM Backlight Control
Some screens use PWM dimming tied to the refresh rate. If both frequencies are low, flickering may be visible at low brightness levels.
While often overlooked, the screen refresh rate significantly influences the usability and perceived quality of a body camera display. Choosing the right refresh rate ensures smooth visuals, minimal flicker, and an overall better user experience—without sacrificing battery life or thermal performance.