Viewing angles directly depends on the size of the LED display how many of the audience, and the bigger the better, the size of the viewing Angle is mainly composed of tube core encapsulated way to decide.

2. The flatness: LED display surface roughness to within + / - 1 mm, to ensure that the display image is not distorted, local convex or concave can lead to the visual Angle of the LED display blind Angle.The stand or fall of flatness is mainly decided by the production process.
3. The colour authenticity: the reducibility of color reducibility is refers to the LED display of color reducibility, the color of the LED display shows both to maintain highly consistent with the colour of the source, so as to ensure the image sense of reality.
4. The white balance: white balance effect white balance effect is one of the most important indicator LED display.Chromatology on the proportion of red, green, blue three primary colors of 3:6:1 will only show the pure white, if the actual rate is a little deviation will appear white balance deviation, generally pay attention to whether there is a slant blue, white slant yellow phenomenon.The stand or fall of the white balance is mainly composed of LED display control system to determine, tube core of color reducibility may also be affected.
5. Color: any color piece and color piece is refers to the adjacent LED module between relatively clear off color, color transition in module, color piece phenomenon caused mainly by the control system is poorer, grey level is not high, caused by lower scanning frequency.
6. Presence of Mosaic, dead center phenomenon: Mosaic refers to appear on the LED display normally on or often black small four squares, both module necrosis phenomenon, the main reason for the LED display of connector quality closes nevertheless.Dead point refers to appear on the LED display normally on or black often a single point, how many of the dead point mainly determined by the stand or fall of pipe core.
7. Gray level: grey level is between the led display from the darkest to the brightest division series, the higher the grayscale, color is rich, colour is gorgeous;Images are more delicate, more abundant details.At present domestic LED display mainly adopts eight processing system, which is 256 (28) level grey degree.Simple understanding is a total of 256 from black to white brightness changes.Use RGB trichromatic can constitute a 256 x 256 x 256 = 16777216 colors.Known as the 16 million colors.
8. Refresh rate: refresh rate refers to the LED display screen by screen to repeat the number of times, theoretically refresh rate is higher, the display effect is better, in general civil or commercial level LED display series products of indoor LED display refresh rate is more than 180 hz, outdoor LED display refresh rate is greater than 300 hz.

This paper keywords: LED display, LCD monitors, industrial monitors, LCD, LED electronic display screen, LED display application, display, medical instruments, monitoring instruments, automotive displays, LED display, which is good?Hong Kong prosperous electronic forever.
This paper is derived from the network.