LG 38UC99 review: 4K UltraWide

LG brings 21:9 UltraWide to another level


Specifications and test results

On this page you can find the complete specifications and test results of the LG 38UC99.

Product name38UC99-W
Product code38UC99-W
DetailsProduct info
Panel characteristics
Screen size37.5 inch
Pixel density111 ppi
TFT panel typeIPS
Curved screen
Curvature3800 R
Aspect ratio21:9
Pixel size0.229 mm
3D support
Overdrive function available
120 Hz
144 Hz
AMD FreeSync
AMD FreeSync min. freq.52 Hz
AMD FreeSync max. freq.75 Hz
Nvidia G-Sync
Maximum refresh rate75 Hz
Anti motion blurLG 1ms Motion Blur Reduction
D-Sub input
HDCP compatible
DVI input
HDMI input
Number of HDMI inputs2
Highest compatible at HDMI version2.0
DisplayPort input
Mini-DisplayPort input
Number of Display Port inputs1
DisplayPort output
USB Type-C input
Picture in Picture
Picture by Picture
HDMI audio output
3,5mm jack audio in
Integrated USB HUB
USB version3.0
Integrated speakers
Built-in webcam
Memory card reader
Built-in TV tuner
Physical specifications
Size - Width89.8 cm
Size - Height46.5 cm
Size - Depth32 cm
Height adjustable
Minimum height top bezel46.5 cm
Maximum height top bezel57.7 cm
Maximum height adjustment11.2 cm
Portrait mode
Mounting SizeVesa 100mm
Weight9.83 kg
Manufacturer specifications
Colours1070 mln
Total response time5 ms
Brightness300 cd/m²
Contrast ratio1000 : 1
Maximum horizontal view angle178 °
Maximum vertical view angle178 °
Flicker reduction
Power consumption (active)70 W
Power consumption (standby)0.3 W
Pixel policy / Warranty
Warranty period2 year(s)
Included accessories
Remote control
Digital video cable included
Response times and input lag
Overdrive on by default
Response time (0%-100%)10.58 ms
Response time (100%-0%)8.4 ms
Response time (100%-0%-100%)19 ms
Response time (20%-80%)17.02 ms
Response time (80%-20%)10.13 ms
Response time (20%-80%-20%)27.2 ms
Response time OD (0%-100%)10.16 ms
Response time OD (100%-0%)8.11 ms
Response time OD (100%-0%-100%)18.3 ms
Response time OD (20%-80%)6.8 ms
Response time OD (80%-20%)7.41 ms
Response time OD (20%-80%-20%)14.2 ms
Overshoot OD max18 %
Undershoot OD max3 %
Response time OD opt. (0%-100%)10.16 ms
Response time OD opt. (100%-0%)8.11 ms
Response time OD opt. (0%-100%-0%)18.3 ms
Response time OD opt. (20%-80%)6.8 ms
Response time OD opt. (80%-20%)7.41 ms
Response time OD opt. (20%-80%-20%)14.2 ms
Overshoot OD opt.18 %
Undershoot OD opt.3 %
Name OD opt.Fast
Input lag comp. to CRT0 ms
Input lag low (top)2.1 ms
Input lag average (center)9.7 ms
Input lag high (bottom)17.3 ms
Image display time15.2 ms
Power consumption
Energieverbruik 150 cd/m² (white)44.2 W
Energieverbruik 150 cd/m² (black)33.1 W
Energie consumption (white)66.7 W
Energie consumption (black)53.1 W
Energie consumption (standby)0.6 W
Energie consumption (off)0.2 W
Standard display brightness and contrast
Standard display profile settingCustom
Minimum brightness white51.86 cd/m²
Maximum brightness white302.8 cd/m²
Maximum brightness black0.38 cd/m²
Contrast maximum brightness796.8 : 1
Contrast 150 cd/m²799 : 1
Checkerboard contrast 150 cd/m²830 : 1
Fullscreen brightness white 150 cd/m²151.54 cd/m²
Fullscreen brightness black 150 cd/m²0.19 cd/m²
Fullscreen contrast 150 cd/m²797.6 : 1
Lowest vs highest white75 %
Average vs brightest white85 %
Lowest brightness white130.28 cd/m²
Highest brightness white174.23 cd/m²
Lowest vs highest black67 %
Average vs highest black82 %
Lowest brightness black0.15 cd/m²
Highest brightness black0.22 cd/m²
Viewing angles
45° left remaining brightness51 %
45° left avg. colour deviation ΔE 200013.4
45° left SD colour deviation ΔE 20003.3
45° right remaining brightness51 %
45° right avg. colour deviation ΔE 200013.2
45° right SD colour deviation ΔE 20003.4
45° above remaining brightness28 %
45° above avg. colour deviation ΔE 200022.9
45° above SD colour deviation ΔE 20006.8
45° below remaining brightness29 %
45° below avg. colour deviation ΔE 200021.7
45° below SD colour deviation ΔE 20006.4
Standard mode color fidelity
Brightness white 150 cd/m²151.77 cd/m²
Brightness black 150 cd/m²0.19 cd/m²
Color temperature white6651 K
Deviation from ideal color temperature151 K
Contrast 150 cd/m²799 : 1
Standard gamut coverage105.3 %
Color deviation white ΔE 20003.97
Color deviation grey 80 ΔE 20006.39
Color deviation grey 65 ΔE 20007.03
Color deviation grey 50 ΔE 20007.1
Color deviation grey 35 ΔE 20006.81
Color deviation black ΔE 20001.02
Color deviation skin dark ΔE 20004.72
Color deviation skin light ΔE 20005.06
Color deviation sky blue ΔE 20005.06
Color deviation leaf green ΔE 20002.07
Color deviation flower blue ΔE 20004.35
Color deviation blue-green ΔE 20003.25
Color deviation orange ΔE 20004.38
Color deviation purple-blue ΔE 20003.79
Color deviation medium red ΔE 20002.12
Color deviation purple ΔE 20001.38
Color deviation yellow-green ΔE 20001.67
Color deviation orange-yellow ΔE 20002.65
Color deviation blue ΔE 20002.65
Color deviation green ΔE 20001.35
Color deviation red ΔE 20002.33
Color deviation yellow ΔE 20002.76
Color deviation magenta ΔE 20001.59
Color deviation cyan ΔE 20003.5
Color deviation 100% Red ΔE 20005.58
Color deviation 100% Green ΔE 20001.42
Color deviation 100% Blue ΔE 20002.75
Color deviation 100% Cyan ΔE 20001.01
Color deviation 100% Magenta ΔE 20001.1
Color deviation 100% Yellow ΔE 20001.62
SD color checker deviation ΔE 20001.88
Avg. color checker deviation ΔE 20003.35
SD color deviation ΔE 20001.38
Avg. color deviation ΔE 20002.84
Gamma 0%2.2
Gamma 10%2.46
Gamma 20%2.30
Gamma 30%2.21
Gamma 40%2.17
Gamma 50%2.18
Gamma 60%2.17
Gamma 70%2.13
Gamma 80%2.22
Gamma 90%2.39
Gamma 100%2.2
SD gamma0.12
Average gamma2.25
Gamma (deviation from 2.2)0.05
Grayscale deviation 0% ΔE 20001.02
Grayscale deviation 10% ΔE 20001.59
Grayscale deviation 20% ΔE 20003.20
Grayscale deviation 30% ΔE 20004.44
Grayscale deviation 40% ΔE 20005.32
Grayscale deviation 50% ΔE 20006.00
Grayscale deviation 60% ΔE 20006.59
Grayscale deviation 70% ΔE 20007.03
Grayscale deviation 80% ΔE 20006.99
Grayscale deviation 90% ΔE 20006.29
Grayscale deviation 100% ΔE 20003.80
SD grayscale deviation ΔE 20001.97
Avg. grayscale deviation ΔE 20004.88

Product discussed in this review

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LG 38UC99-W

37.5 inch, 3840x1600, 111 ppi, IPS, AMD FreeSync, 75 Hz, HDMI input, DisplayPort input, 5 ms, 300 cd/m², 1000 : 1

Specifications Test results Reviews Prices


Avg. $1,144.00
2 shops, 2x stock

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