Topic: LED CHIP; Led chips; Led package; LED LAMP; LED LAMPS; Light Emitting Diode; LED Display; Full color led display; Led displays.
LED CHIP-Full color LED display
First, the overall series form: the LED CHIP in the simple serial connection mode is connected end to end, and the current flowing through the LED display is equal. The other is an improved way of bypassing the series connection of 1.1.
Second, the overall parallel form: one is a simple parallel form, and the other is an independent matching parallel form. The Led chip in the simple parallel mode is connected in parallel at the beginning and the end, and the voltages on each LED are equal when operating. This kind of reliability is not high, but it also strives to adopt an independent matching parallel form for this problem. It has a good driving effect, complete protection of a single LED display, no other work during the fault, and can be matched with large differences.
Third, the mixed form: the advantages of the parallel and series proposed by the appeal are comprehensive, including two. One is a hybrid mode in which the strings are first combined, and the other is a hybrid mode in which the strings are combined first and last.
Fourth, the cross-array form: cross-array shape is mainly to improve the reliability of LED display work, reduce the failure rate proposed.
There are many ways to connect LED display screens. Each step does not allow connection errors. Therefore, it is necessary for engineers and technicians to understand. The above several connection forms have their own advantages and disadvantages. The specific problems are analyzed and finally found. It is suitable for connecting to the LED display form.
Many engineering and technical people often ignore this point, leading to a variety of problems in the LED display, and ultimately let customers lose confidence in the company. Often a small detail determines success or failure, so in Tianqi Yunchuang in the LED display technology requires fine and fine.
With the development of LED display time, the application field is more and more wide, and the understanding and awareness of LED display is deeper. The problem that has not been understood before is gradually revealed. China's LED display technology mainly has the following problems.
First, the problem of insufficient brightness
The main advantage of LED display is the super adaptability to the complex and complex outdoor environment. The characteristics of the outdoor environment require that the LED display should be sufficient in sunny, cloudy, rainy and snowy weather, long distance and multiple viewing angles. Brightness is used to transmit information, so brightness is especially important. Due to insufficient LED brightness, LEDs can only act as supporting roles in the lighting industry, mainly for decoration. This is a huge challenge for the comprehensive application of tens of thousands of LED chips.
Second, the LED color difference problem
There is basically no chromatic aberration problem in the application of a single LED, but if a large number of LEDs are used in combination, the chromatic aberration problem will be highlighted. Although there are techniques to improve this problem, due to the limitations of domestic technology and production level, there are still differences in the same batch of LEDs in the same color zone, and this difference is difficult to escape the eye-catching, so it is difficult to ensure the color of the LED display. Reducive and realistic.
Third, LED display control chip
True color high-resolution led electronic display as a new display media, with its clear image and high-performance playback capabilities, has been increasingly valued by people. For the LED display unit, the three-primary LED dies are the core components, so high-quality dies with small wavelength differences and good luminous intensity should be used, and this technology is mainly in the hands of world-renowned companies, such as Japan's Nichia company, etc.
