Shenzhen Lianchengfa Technology Co., Ltd.

In recent years, the application of colorful indoor full-color LED displays in stadiums, road traffic, advertising, leasing, etc. has shown a rapid growth trend. From the current market demand analysis, the necessity of on-site proofreading is becoming more and more prominent.

Uniformity proofreading is summarized as: factory proofreading, repair proofreading, service area proofreading and on-site proofreading.

Generally speaking, when the LED display runs to a certain time, all the LED light-emitting tubes will have brightness attenuation, and the attenuation curves of the three primary color tubes are not the same. As a result, their brightness will also be reduced from the factory brightness. However, the difference in the photoelectric characteristics of each LED light-emitting tube causes errors in the degree of decline in their brightness. Therefore, when the display screen is used for a period of time, the light-emitting tube will have different degrees of brightness attenuation, making the display uneven between pixels, and then compared with the screen at the beginning of the factory, the entire picture will appear a granular display state, or the overall brightness decline. The attenuation curve of the three primary color tubes does not change the white balance, color temperature, etc. at the same time.

In fact, due to the attenuation of the LED light-emitting tube and the change of other factors such as ambient temperature, it is almost inevitable that the function of the very excellent display screen will deteriorate when it leaves the factory. It is impossible to complete the project by disassembling and transporting the installed LED display back to the factory for proofreading. In view of these characteristics, it is necessary for LED display manufacturers such as Lianchengfa to carry out on-site proofreading to ensure that the display function at the factory is always maintained throughout the life cycle of the display. Several on-site proofreading methods:

1. According to the calibration method of LED running time:

This is an early on-site calibration method, which is based on tracking and recording the operating time of each LED module to perform on-site calibration of the display. By roughly calculating the working time of each LED, measuring their respective uniform brightness attenuation, estimating different calibration levels, and then sending them to each LED module for corresponding adjustment. This approach does not require any manual input. However, this method overlooks a very important problem, the LED attenuation frequency estimated by the running time is not suitable for each LED. With the increase of operating time, the fluctuation scale of LED attenuation frequency is also larger and larger, and the calibration on a uniform basis makes some LEDs close to the calibration level, but makes other LEDs more and more contrary.

Because the brightness levels of each module are different, and there is no effective way to adjust these modules with mismatched brightness, a series of problems will occur when the uniformity is adjusted between different modules during operation. And the point is, this method cannot complete the calibration between pixels. Therefore, after this proofreading, the overall feeling of the display screen will appear mosaic phenomenon, which cannot improve the uniformity of the display screen in the later stage.

2. According to the common proofreading method on site:

In order to completely improve the uniformity of the display screen, it is necessary to use special collection equipment to quickly collect the light color information of each pixel of the LED display screen on the spot, and use the relevant algorithm to compensate for the actual attenuation of each LED light-emitting tube. , and then complete the unified proofreading in the real sense, even for LED modules that run at different times, the pixel-level calibration can be completed. Through proofreading, the display screen can be restored to the uniform display function just before leaving the factory.

The above is the analysis of the necessity of calibration of the LED high-definition full-color display screen organized by Liancheng. LCF is a world-leading provider of LED display applications and solutions, as well as a national-level specialized, special, and new little giant enterprise. The main business covers "smart city", "cultural tourism business performance", "commercial display project", "content technology" four major sections, with the world's leading automated production equipment and modern post-doctoral research laboratory and perfect sales and services team. Friends who want to buy LED display can also contact us, LCF LED display manufacturer, a big country brand, trustworthy!