LED display drivers are the core technology of LED displays, and as driver technology continues to advance and develop, it allows viewers to bring a more realistic picture when viewing display content. Below, I will explain all the information about LED display drivers in full.
What is the LED display driver
LED display driver is one of the core technology of the LED module, LED driver’s volume is very small, but it has a powerful chip control system, which controls the operation of the whole LED module and the management of the data, to ensure that each LED light emits light uniformity, so that the whole LED display can play a great visual effect.
History
In the 1990s, the various applications of LED display screen are still in monochrome and bicolor as the main color. However, in 1997, China’s research team developed the first LED display dedicated driver 9701, this successful invention will be the original 16 levels of gray scale up to 8192 levels, so that the display screen in the picture can be consistent with the colors of the real world; this research and development also makes the LED display color vividness more realistic.
In later years, constant current driver in the study of full-color light-emitting LED display on the way to become the optimal choice, the original 8-channel driver was later replaced by a higher degree of integration of 16-channel driver.
In the late 1990s, Toshiba, Allegro, Ti and other companies to implement the 16-channel constant current LED display driver chip; nowadays, some driver IC manufacturers have research and integration of higher 48-channel constant current LED display driver chip.
Principle of operation
LED display driver to simultaneously manipulate all the LED lights in the LED module, LED driver system is a current-driven device, and other electronic devices are not the same, because other electronic devices are non-voltage-driven devices. Because the LED driver is a current driver, so the LED display is particularly sensitive to the current and voltage, even if the smallest voltage passes through, will make the LED display current changes dramatically.
LED display driver controls the LED module current and voltage switch, the LED input voltage is converted into a suitable LED module constant current, so as to maintain the brightness of the LED module uniformity, you can avoid the phenomenon of flickering display; but also to maximize the extension and maintenance of the battery life of the LED display.
Performance indicators
For the LED display driver IC performance indicators, the most important than the entire LED display refresh rate and gray level and image color consistency. When the LED display driver IC play the better, constant current consistency will be higher, and then the rate of the communication interface can also meet, and constant current corresponding speed will be more rapid;
However, in the 20th century before the driver IC is still very difficult to do to make these three advantages compatible with each other.
Now, with the LED display driver technology in the continuous progress and improvement, the three of them do not belong to the diminishing relationship. In the use of camera shots no longer appear black lines, grayscale also reached a higher level, to achieve the LED display color brightness to achieve a more uniform degree.
LED display driver type
General-purpose chip
The general-purpose chip of the LED display driver IC was originally realized for a part of the logic function needed for the internal display. Its main feature is to be able to support a smaller scale LED display system drive current and applicable to monochrome or lower-cost generation of LED display.
Dedicated chip
for the realization of the special nature of the LED light-emitting special development of a dedicated driver chip, can also be said to be specifically designed for the LED display. Light-emitting diode is a current type of device, when the current in the saturated conduction under the premise of the brightness of the LED display will change with the current changes, and not because of the different voltage on both sides of the change.
Specialized chips are mainly characterized by the ability to provide a consistent constant current, constant current can ensure that the LED display in the output of high-quality images or video, LED display brightness will be uniform and stable, and to reduce the phenomenon of LED display flicker.
Dual-locking chip
General-purpose chips have only one cache space, while dual-locking chips add a higher quality cache space on the basis of general-purpose chips, so that the LED display does not need to wait for the completion of the output to display the picture when transmitting data, dual-locking chips increase the cache space can also be effective in increasing the brightness of the LED display and a higher refresh rate.
Constant Current Driver IC
Constant current driver is one of the main core of today’s high-quality LED display, constant current driver ensures that the whole LED module receives the same current and is not limited by voltage fluctuation, even after other components have been replaced, the whole LED module can be left unaffected, which shows that the constant current driver has a super high compatibility.
Constant-current driver can freely control the brightness and refresh rate of the display, so that the LED display in the possession of ultra-high brightness can also continue to reduce the rate of flicker; overall, the constant-current driver in the field of LED display is in the field of high-quality drive system, which supports the high refresh rate, reduce the risk of lamp failure and flicker, but also for the display to provide sufficient brightness and ultra-high gray level.
What is the importance of driver for LED display
Brightness management and energy saving
Driver can handle the complex tasks of LED display, just like being able to control the constant current of the whole display, so as to keep the brightness of LED display consistent, thus realizing more energy saving of LED display. Making LED displays more energy efficient is a never-changing pursuit, LED display driver can reduce the traditional 5V switching power supply to 3.8V or less.
Enhance the reliability of the display
driver in the LED display to obtain a more stable output of constant current, which can effectively extend the service life of the LED display, especially the high refresh rate supported by the constant current driver, but also reduces the risk of flickering, dimming, and so on, to achieve the reliability of the entire display.
Have a constant high refresh rate
LED display has a high refresh rate can effectively relieve eye fatigue, and LED display driver can increase the refresh rate of the display, so as to remove flickering, artifacts and video blurring and other phenomena; if the refresh rate is too low will affect the audience’s viewing experience, and high quality driver can support a high refresh rate, to achieve smoother transitions, reduce the screen to enhance the viewing experience of the ghosting.
Color depth and grayscale accuracy
LED display driver chip with internal PWM function, this function can be based on specific data input to generate grayscale, can more easily generate deep grayscale, so as to display a higher quality image, at the same time, this function can also increase the depth of the color, LED display color can be more accurate, so as to enhance the real sense of the LED display screen and watch the clarity of the display content. The clarity of the display content.
Driver IC and LED display refresh rate relationship
LED display conventional refresh rate of 960Hz, 1920Hz, 3840Hz. LED display driver is the basis of the control of the refresh rate, we use advanced PWM modulation of the driver IC, can be easily realized up to 3840Hz or even above the high refresh rate, and the performance of lower LED display driver will suffer a certain degree of refresh rate.
After having a good driver, the refresh rate will also be improved, thus realizing a clearer image and smoother visual effect, bringing an unforgettable immersive viewing experience for the audience; in addition, the smoothness brought by the high refresh rate can effectively reduce visual fatigue.
Common Brands and Models of LED Display Drivers
The driver chip for LED display is hot in the market, so it is more maturely developed compared with other drivers. I will give you a list of a few more common brands and models of LED driver IC in the market:
National star common driver IC model NH-Z3535RGBA-SG, the product lead frame internal bending, can do multiple waterproofing, reliability is relatively strong;
Another RS-727MWAS model with a matte surface and has an ultra-high contrast ratio, can be done 100% flatness, so that the LED display driver IC can be used in a wide range of applications. The other model RS-727MWAS has a matte surface and ultra-high contrast ratio, which can achieve 100% flatness, making the light from the LED display more even and flat, and so on.
Kinglinght company focuses on LED display technology research and development has been more than 16 years, the company’s commonly used product model MC1515PM1, this product is characterized by an increase in the white light to improve the brightness and clarity, so that the color is more reproducible, etc.;
In addition, the company’s KS series of 2727-KS4 surface using imported glue package, sealing performance is very high can also improve the heat dissipation effect and extend the service life. Improve the heat dissipation effect and prolong the service life.
Ray shin is a focus on research and development of LED display device manufacturers, fully for customers to create a whole industry chain, to provide quality services, recommended products are RRS-E212RGB-CCNC, the product design energy-saving, but also can make the display screen heat uniformity, the display effect can be greater to meet the phenomenon of fading will not occur even if the long-term use of the phenomenon will not appear fading;
RS-E1010RGB-CCNC, the company’s KS series 2727-KS4 surface using imported adhesive packaging can also improve heat dissipation and extend the service life. E1010RGB-CCN, the surface display matte, the shell is packaged in black, the use of a new type of adhesive, can effectively prevent the refraction of light and so on.
In short, there will be more and better LED display driver products on the market, but also hope that the list of these models can help you choose a satisfactory LED display driver IC.
