15 Common Sense Problems of the LED Display Screen
1:What are the table stickers? What are the advantages and disadvantages?
➤ The table also called SMT, put the light of SMT assembly by welding technology welding on the surface of PCB board, it’s not through the PCB board, light foot made from this process module called table stick module;
➤ the advantage is: perspective, downy, a display image pixel density is big, suitable for indoor.
➤ the defect is high enough brightness, the lamp itself heat dissipation is not good enough.
2:What is 3 in 1? What are the advantages and disadvantages?
➤ refers to the R, G, B three different colors of LED chips encapsulation within the same gel;
➤ the advantage is: the production of simple, display effect is good.
➤ shortcomings are spectral color separation difficult, high cost.
3:What is a double base color, fake color, full-color display?
➤ by different colors of LEDs to form a different screen, double colors are red, green or yellow, green two-color composition, pseudo color is red, yellow, green, blue three different color composition, full color is red, pure green, pure blue of three different colors;
4:What is luminosity?
➤ LED display intensity of light emitted per unit area, the unit is CD / ㎡, simply be a square meter display light intensity.
5:What is the brightness level?
➤ the whole screen brightness between the lowest to the highest brightness series of manual or automatic adjustment.
6:What is greyscale?
➤ under the same brightness grade, display from the darkest to the brightest technology processing series.
7:What is the maximum brightness?
➤ under certain environmental illumination, LED display primary colors when the maximum brightness and gray level.
8:What is the PCB?
➤ is PCB (Printed Circuit Board) Printed Circuit boards?
9:What is white balance? What is white balance adjustment?
➤ what we call the white balance, is refers to the white balance, namely the brightness of the R, G, B three colors 3:6:1 ratio balance.
➤ the brightness of the R, G, B three colors and white coordinate adjustment, known as the white balance adjustment.
10:What is the contrast?
➤ under certain environmental illumination, LED displays the ratio of maximum brightness and background brightness.
11:What is the color temperature?
➤ the color of the light source emits light radiation at a certain temperature light color at the same time, the temperature of the blackbody is referred to as the light source color temperature, usually, 2000 k to 5000 k with yellow in color with white gradually to is white.
12:What is the change in frame frequency?
➤ per unit time the number of display screen information update.
13:What is the refresh rate?
➤ the refresh rate is the speed of screen refresh. The lower the refresh frequency, the more powerful the image and jitter, the faster the eye fatigue, sometimes causing sore eyes. The larger the refresh rate, the smaller the damage to the eye, the average LEDx display refresh rate of 120HZ.
14:What is the best perspective?
➤ perspective is the brightness of the observation direction down to half of the LED display normal brightness, the same plane two observation direction and normal direction Angle. Divided into horizontal and vertical angles;
➤ can perspective is just to see the direction of the image content on the screen, and display the normal into Angle;
➤ the best Angle of view is to see the content of the display screen, just complete and unbiased color, image content is the clearest direction with the normal Angle.