The Chromaticity Uniformity of the LED Display Screen Affects the Display Effect of the Display Screen

Publisher: Supplier of LED Display Time: 2018-10-23 Views: 1740

Color occupies a very important position in the visual effect of LED display screen, and it is also one of the criteria for us to judge the quality of products when purchasing. In production, the uniformity of LED display chromaticity has always been the focus of manufacturers' breakthroughs.  


It is generally believed that the uneven brightness of the LED can be improved by single-point correction, while the uneven chromaticity cannot be corrected, and can only be improved by subdividing and screening the color coordinates of the LED. How to make the color display of the LED display more vivid?


To produce an LED display, first select the optional light-emitting or display module according to the brightness index, and then determine the color based on the selected product red, green, and blue color intensity, usually the low brightness ratio is used as a brightness reference, when the baseline maximum brightness Adjust, the other (two-color) or (full-color). Two-color display, large In most cases, green is used as the reference to adjust the operating current of the red transistor. Generally, reduce the working current to balance the yellow color, and adjust the standard, such as reducing the brightness of the entire display screen. The LED display color is adjusted to the balance of the state, which will reduce the screen brightness. If the screen is displayed to meet the brightness requirements, bring each color to maximum brightness and then lose balance. For example: dual color screen yellow or red, green.



We found that even first-tier international brands have wavelength deviations and color saturation deviations, so chromaticity uniformity correction is extremely important. The three primary colors of red, green and blue are widely used in terms of luminous color and luminous efficiency, as well as luminescent materials and production processes. Because light emitting diodes display low operating voltage, can be active light and have a certain brightness, brightness and voltage (or current) adjustment, shock resistance, vibration resistance itself, long life, so in large display devices.


The LED luminescent materials used in LED display screens have the following forms:


1. Diverse wafers composed of LED dot matrix modules form an array of light-emitting moments, which are sealed in a plastic shell with epoxy resin. Fitted with line scan driver, it is easy to form high-density display for indoor display.


2. The SMD light-emitting diode lamp (or light-emitting diode) is a package in the form of welding of the light-emitting lamp, which can be used indoor LED display screen, which can realize single-point maintenance and effectively overcome the mosaic phenomenon.


3. The light-emitting lamp consists of a light-emitting diode chip, a reflecting bowl metal anode, cathode, metal structure, and an epoxy resin shell with light-gathering ability. Provided one or more (different colors) form a single light basic pixel, due to high brightness, for outdoor LED display.