The adjusting method of color and brightness

At present, there is many quantity of manufacturing of dual-color light emitting diode (LED) display,its technology is relatively ripe too. The structure, principle of display screen which each enterprise makes are basically similar, some specialize in and reveal the multimedia card, so, it is the key point of competition of each enterprise to improve the technical feature on the display screen, reduction of cost. Now, the price of LED display sold on the market is basically the same, however, the quality on display which different enterprises produce is different, reason its in many aspects, mainly as follows,

①LED display module of quality, brightness, brightness uniformity, encapsulation technology. ②Data communication transfer mode, anti-interference ability. ③Reveal, scan circuit current many to adjust a bit, control every bit of current. Through a bit adjustment more display t not only the uniformity is better, but also l the luminance of the picture, color effect are better, revealing and scanning the circuit special-purposely has better display results, but the price is relatively expensive.

Now, LED display sold on the market is that a lot of enterprises utilize the same designing technique, method, display module produced, but its difference of performance is greater. The difference of color matching,image effect difference is very big. Scanning frequency of the module, working current influences the luminance, also involve questions such as lifespan,etc.. So, confirm correctly every technical parameter is the key point of making LED display, can be said to be the embodiment of technological experience too.

1 reveals the principle of scanning

LED control structure on display screen that each enterprise makes is different to some extent, but basically the same scanning circuit. Reveal that scanning the circuit adopts the serial way to convey the data, so can save the position of the circuit board, and suitable for the data transmission between display screen and the computer.

2 working state analysis

The principle to scan circuit is dynamic scanning mode, can't static behavior measure its working current, so, to calculate the working current, one should analyze the dynamic parameters.

3 Adjustment of luminance and color

While making large screen, should choose LED or display module according to the luminance index. The color on the display screen is adjusted to the best equilibrium state, will make the luminance rejected reduce. If LED display in order to meet requirements for luminance, reach the largest luminance of every kind of color, then lose equilibrium of colors,

4 Scan frequency adjustment

The way that scan the circuit is dynamic scanning, static driving. If reduce the scanning frequency rejected, the luminance is reduced.