LG C4 77" vs Samsung S90D 65"
Side-by-side comparison of viewing distance, PPI, and specifications
Category Ranking
Pixel Density (PPI)28in category
LG C4 77"57 PPI #27
Samsung S90D 65"68 PPI #8
57 PPI118 PPI
HDR Peak Brightness28in category
LG C4 77"1049 nits #24
Samsung S90D 65"1500 nits #17
677 nits5000 nits
DCI-P3 Color Gamut28in category
LG C4 77"98.7% #10
Samsung S90D 65"98% #13
94%100%
Refresh Rate
LG C4 77"144 Hz
Samsung S90D 65"144 Hz
StandardHighUltra
Summary
- Sharpness: no visible difference — Both screens exceed the retina threshold at 250cm. The Samsung S90D 65" has 16% higher pixel density (68 vs 57 PPI), but this only becomes visible below 129cm.
- Brightness: advantage LG C4 77" — The LG C4 77" is 18% brighter in SDR (296 vs 250 nits), a noticeable difference for outdoor readability. HDR peak: 1049 vs 1500 nits.
Key Differences
| Specification | LG C4 77" | Samsung S90D 65" |
|---|---|---|
| Screen Size | 77" | 65" |
| SDR Brightness | 296 nits | 250 nits |
| Pixel Density (PPI) | 57 | 68 |
| Optimal Viewing Distance | 1.5m | 1.3m |
| HDR Peak Brightness | 1049 nits | 1500 nits |
| Color Gamut | sRGB 100% · DCI-P3 98.7% · Adobe RGB 96% | sRGB 100% · DCI-P3 98% · Adobe RGB 97% |
All specifications
| Specification | LG C4 77" 2024 | Samsung S90D 65" 2024 |
|---|---|---|
| Screen Size | 77" (Better) | 65" |
| Resolution | 3840×2160 | 3840×2160 |
| Pixel Density (PPI) | 57 | 68 (Better) |
| Optimal Viewing Distance | 1.5m | 1.3m (Better) |
| Panel Type | OLED | QD-OLED |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 16:9 |
| Refresh Rate | 144 Hz | 144 Hz |
| Variable Refresh Rate (VRR) | FreeSync Premium | FreeSync Premium Pro |
| Response Time | 0.1 ms GTG | 0.1 ms GTG |
| HDR Certification | None | None |
| SDR Brightness | 296 nits (Better) | 250 nits |
| HDR Peak Brightness | 1049 nits | 1500 nits (Better) |
| Contrast Ratio | 1:1,000,000 | 1:1,000,000 |
| Ports | 4x HDMI | 4x HDMI |
| Color Gamut | sRGB 100% · DCI-P3 98.7% · Adobe RGB 96% | sRGB 100% · DCI-P3 98% · Adobe RGB 97% (Better) |
| Year | 2024 | 2024 |
Frequently Asked Questions
Which has better PPI: LG C4 77" or Samsung S90D 65"?
The Samsung S90D 65" has 68 PPI compared to 57 PPI for the LG C4 77".
Which has a closer optimal viewing distance?
The Samsung S90D 65" requires 1.3m vs 1.5m for the LG C4 77" to reach retina quality.
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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).
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