A few mention a flicker sensitivity to 60 hz displays vs 120hz. Sounds weird doesn’t it as content on 4K tvs is usually only 60 hz
The screen refresh technology used in TVs is markedly different than in computer monitors. It's designed to minimize flicker to the point of imperceptibility even at 60 Hz. Why more computer monitors don't incorporate more of these approaches, I don't know. The details are better explained than I can remember, by ChatGPT:
1. Different Pixel Refresh Methods (Sample-and-Hold vs. Pulse-Based)
• Most modern TVs use “sample-and-hold” displays, meaning each frame stays on screen until the next one replaces it.
• Some monitors, especially older ones, use pulse-based (strobed) backlighting or other techniques that can make flicker more noticeable.
• Monitors often have lower display persistence, making flickering more perceptible during rapid eye movements.
2. Motion Processing & Frame Interpolation in TVs
• Many TVs process motion differently than monitors.
• Some 60Hz TVs use motion interpolation (“soap opera effect”), adding artificial frames to smooth out motion.
• Even if interpolation is off, TVs often use a form of black-frame insertion (BFI) or backlight scanning to reduce motion blur, which can hide flicker effects.
3. Backlight Differences (PWM vs. Constant Backlight)
• Monitors often use PWM (Pulse-Width Modulation) dimming, which rapidly turns the backlight on and off to control brightness.
• Lower PWM frequencies can create noticeable flicker, especially at lower brightness levels.
• TVs typically use constant backlighting or high-frequency PWM, making flicker much less noticeable.
4. Viewing Distance & Perception
• TVs are viewed from a farther distance, which naturally reduces the perception of flicker.
• Computer monitors are viewed up close, meaning subtle flicker effects are more noticeable to our eyes.
• Peripheral vision is more sensitive to flicker—since monitors fill more of our close-up vision, they can appear to flicker more than TVs.
5. Scrolling vs. Panning Differences
• On a computer monitor, rapid scrolling through text or UI elements can create a noticeable strobing effect due to frame persistence and refresh rate limitations.
• TVs don’t typically display fast-moving UI elements like a computer screen does (text is usually static, and most content is smooth-motion video).
6. OLED & Other Panel Technologies
• OLED TVs refresh differently than traditional LCD monitors, as each pixel emits its own light and doesn’t require a backlight.
• Some gaming monitors and high-end TVs use variable refresh rates (VRR), helping reduce perceived flicker.