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| General Info | ||
|---|---|---|
| Model Number | Lenovo E28u-20 | ViewSonic VP2458 |
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| Price | ||
| Type | Monitor | Monitor |
| Year | 2022 | 2018 |
| Brand | Lenovo | ViewSonic |
| Model Number | E28u-20 | VP2458 |
| Alias | 62F9GAR4 | |
| Display | ||
| Screen Size Class | 28" (inches) | 24" (inches) |
| Diagonal Size | 28 in 71.1 cm 711.2 mm 2.33 ft |
23.78 in 60.4 cm 604 mm 1.98 ft |
| Screen Width | 24.45 in 62.1 cm 620.928 mm 2.04 ft |
20.75 in 52.7 cm 527.04 mm 1.73 ft |
| Screen Height | 13.44 in 34.1 cm 341.28 mm 1.12 ft |
11.67 in 29.6 cm 296.46 mm 0.97 ft |
| Display Manufacturer | Innolux | |
| Display Type | AAS IPS | IPS |
| Display Bit Depth | 10 bits (8 bits + FRC) | 8 bits (6 bits + FRC) |
| Frame Rate Control | Yes | Yes |
| Max Number of Colors | 1073741824 | 16777216 |
| Bits | 30 | 24 |
| Screen Aspect Ratio | 16:9 | 16:9 |
| Screen Resolution | 3840 x 2160 | 1920 x 1080 |
| Screen Pixel Pitch | 0.16 mm | 0.275 mm |
| Screen Pixel Density | 157 ppi | 92 ppi |
| Screen-to-Body Ratio | 89.03 % | 93.21 % |
| Backlight Source | W-LED | W-LED |
| DCI P3 | 90% | 70% |
| sRGB | 99 % | 97 % |
| Adobe RGB 1998 | 70 % | |
| NTSC 1953 | 72 % | |
| Screen Brightness | 300 cd/m² | 250 cd/m² |
| Static Screen Contrast | 1000 : 1 | 1000 : 1 |
| Dynamic Screen Contrast | 3000000 : 1 | 20000000 : 1 |
| Screen Horizontal Viewing Angle | 178 ° | 178 ° |
| Screen Vertical Viewing Angle | 178 ° | 178 ° |
| Screen Input Lag | 35 ms | |
| Display Minimum Response Time | 4 ms | 7 ms |
| Display Average Response Time | 6 ms | 14 ms |
| Display Maximum Response Time | 14 ms | |
| Display Coating | Anti-glare/Matte | Anti-glare/Matte (3H) |
| HDR | HDR10 | |
| 3D | No | No |
| Size, weight, color | ||
| Case Depth | 1.93 in 4.9 cm 48.9 mm 0.16 ft |
1.89 in 4.8 cm 48 mm 0.16 ft |
| Case Weight | 4.6 kg 10 lbs |
3.1 kg 7 lbs |
| Case Width with Stand | 25.07 in 63.7 cm 636.9 mm 2.09 ft |
21.22 in 53.9 cm 539 mm 1.77 ft |
| Case Height with Stand | 14.98 in 38.1 cm 380.6 mm 1.25 ft |
16.68 in 42.4 cm 423.7 mm 1.39 ft |
| Case Depth with Stand | 8.66 in 22 cm 220 mm 0.72 ft |
8.46 in 21.5 cm 215 mm 0.71 ft |
| Case Weight with Stand | 6.8 kg 15 lbs |
5.5 kg 12 lbs |
| Case Color | Raven Black | Black |
| Hardware | ||
| Built-in Camera | No | No |
| Connectivity | 2 x 3.5 mm Audio Out 2 x HDMI 2.0 1 x DisplayPort 1.4 |
1 x HDMI 1.4 1 x DisplayPort 1.2 1 x D-sub 2 x USB 3.1 (downstream) 1 x USB 3.1 (upstream) |
| Audio | ||
| Audio Speakers | 2 x 2W | |
| Features | ||
| Cool Features | Flicker-free technology Natural Low Blue Light 3-side NearEdgeless design AMD FreeSync technology |
HDCP (High-bandwidth Digital Content Protection) Blue Light Filter Flicker-free technology |
| Extra Features | Anti-theft stand lock slot - Kensington | Anti-theft stand lock slot - Kensington |
| Ergonomics | ||
| Case Width | 25.07 in 63.7 cm 636.9 mm 2.09 ft |
21.22 in 53.9 cm 539 mm 1.77 ft |
| Case Height | 14.71 in 37.4 cm 373.7 mm 1.23 ft |
12.24 in 31.1 cm 311 mm 1.02 ft |
| Vesa Mount Support | Yes | Yes |
| VESA Interface Standard Size | 100 x 100 | 100 x 100 |
| Removable VESA Stand | Yes | Yes |
| Height Adjustment | Yes | Yes |
| Height Adjustment Range | 200 mm 20 cm 7.874 in 0.6562 ft |
130 mm 13 cm 5.1181 in 0.4265 ft |
| Landscape or Portrait Pivot Support | Yes | Yes |
| Left Pivot | 90 ° | 90 ° |
| Right Pivot | 90 ° | 90 ° |
| Left or Right Swivel Support | Yes | Yes |
| Left Swivel | 360 ° | 60 ° |
| Right Swivel | 360 ° | 60 ° |
| Forward and Backward Tilt Support | Yes | Yes |
| Forward Tilt | 5 ° | 5 ° |
| Backward Tilt | 22 ° | 21 ° |
| Frequency and Interpolation | ||
| Vertical Digital Frequency | 60 Hz | 48 Hz - 75 Hz |
| Horizontal Digital Frequency | 55 kHz - 90 kHz | |
| Screen Interpolation Measurement Unit | NULL | |
| Accessories | ||
| Extras | HDMI cable | DisplayPort cable USB 3.1 upstream cable |
| Certificates and Standards | ||
| Licenses | CCC China Energy Efficiency Standard Tier 2 ENERGY STAR Eyesafe Display Certification RoHS (EU 2002/95/EC) TCO 9.0 TCO Edge 2.0 TÜV Low Blue Light (Hardware Solution) TÜV Rheinland Eye Comfort Volatile Organic Compound Certification Windows Certification |
CB CCC CE CEL Level 1 CU ENERGY STAR 7.0 ErP eStandby FCC Class B REACH SVHC List & DoC RoHS VCCI WEEE |
| Usage and Storage Requirements | ||
| Safe Operating Temperature Level | 0 °C - 45 °C 32 °F - 113 °F |
0 °C - 40 °C 32 °F - 104 °F |
| Safe Operating Humidity Level | 10 % - 80 % | 10 % - 85 % |
| Internal Storage Temperature | -20 °C - 60 °C -4 °F - 140 °F |
-25 °C - 55 °C -13 °F - 131 °F |
| Internal Storage Humidity | 5 % - 95 % | 20 % - 90 % |
| Max Operating Altitude | 5000 | 5000 |
| Max Storage Altitude | 12192 | 12192 |
| Lenovo E28u-20 | ViewSonic VP2458 |
