Dell ST2421LB, ST2420LB appendix Flat Panel Specifications, Model ST2420L/ST2421L

HDMI Connector

Pin Number

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

19-pin Side of the Connected Signal Cable

TMDS DATA 2+

TMDS DATA 2 SHIELD

TMDS DATA 2-

TMDS DATA 1+

TMDS DATA 1 SHIELD

TMDS DATA 1-

TMDS DATA 0+

TMDS DATA 0 SHIELD

TMDS DATA 0-

TMDS CLOCK

TMDS CLOCK SHIELD

TMDS CLOCK-

CEC

Reserved (N.C. on device)

DDC CLOCK (SCL)

DDC DATA (SDA)

DDC/CEC Ground

+5V POWER

HOT PLUG DETECT

Flat Panel Specifications

Model	ST2420L/ST2421L
Screen type	Active matrix - TFT LCD
Panel type	TN
Screen dimensions	60.97cm (24 inches) (24-inch viewable image size)
Preset display area:
Horizontal	531.36 mm (20.92 inches)
Vertical	298.89 mm (11.77 inches)
Pixel pitch	0.277 mm
Viewing angle	160° (vertical) typical, 170° (horizontal) typical
Luminance output	250 CD/m² (typical)
Contrast Ratio	1,000:1 (typical)
	ST2420L: 8,000,000 to 1*
Dynamic Contrast Ratio
	ST2421L: 7,000,000 to 1*
Faceplate coating	Antiglare with hard-coating 3H
Backlight	LED light bar system
Response Time	5 ms typical
Color Depth	16.7 mil colors
Color Gamut	81 %**
* Based on estimation

** ST2420L/ST2421L Color Gamut (Typical) is based on CIE1976 (81 %) and CIE1931 (68 %).