LG B4 55" vs TCL QM7K 65"
Side-by-side comparison of viewing distance, PPI, and specifications
| Specification | LG B4 55" 2024 | TCL QM7K 65" 2025 |
|---|---|---|
| Screen Size | 55" | 65" (Better) |
| Resolution | 3840×2160 | 3840×2160 |
| Pixel Density (PPI) | 80 (Better) | 68 |
| Optimal Viewing Distance | 1.1m (Better) | 1.3m |
| Panel Type | OLED | Mini-LED |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 16:9 |
| Refresh Rate | 120 Hz | 144 Hz (Better) |
| Variable Refresh Rate (VRR) | FreeSync Premium | FreeSync Premium Pro |
| Response Time | 0.1 ms GTG (Better) | 6 ms GTG |
| HDR Certification | None | None |
| SDR Brightness | 374 nits | 550 nits (Better) |
| HDR Peak Brightness | 677 nits | 1700 nits (Better) |
| Contrast Ratio | 1:1,000,000 (Better) | 1:5,000 |
| Ports | 4x HDMI · 0x DP | 4x HDMI · 0x DP |
| Color Gamut | sRGB 100% · DCI-P3 99% · Adobe RGB 97% (Better) | sRGB 100% · DCI-P3 97% · Adobe RGB 90% |
| Year | 2024 | 2025 (Better) |
Summary
The LG B4 55" has higher pixel density (80 PPI), making it sharper at close range.
The LG B4 55" allows sitting closer (1.1m) while maintaining retina quality.
The TCL QM7K 65" offers a larger 65" display for more immersive viewing.
Frequently Asked Questions
Which has better PPI: LG B4 55" or TCL QM7K 65"?
The LG B4 55" has 80 PPI compared to 68 PPI for the TCL QM7K 65".
Which has a closer optimal viewing distance?
The LG B4 55" requires 1.1m vs 1.3m for the TCL QM7K 65" to reach retina quality.
Methodology & Sources
Formula: Retina distance (cm) = 3438 / PPI. Displayed values are rounded for readability.
Sources: Official manufacturer spec sheets and product pages. Specs are normalized before comparisons.
Comparison winners are calculated metric by metric (higher is better for most specs; lower is better for distance/response time).
Last updated:
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