In recent years, the space boom of the LED electronic large screen rental market has driven the entire industry into a stage of rapid growth. In addition to advertising screens, performing arts screens, traffic guidance screens, etc., which are widely used outdoors, LED electronic screens used indoors are also a market with great potential, including large indoor monitoring screens and indoor electronic curtain walls. According to the survey and statistics of relevant institutions, the output value of China's LED display industry has reached 21.9 billion yuan in 2011, an increase of 18% year-on-year. It is estimated that China's LED display industry will still maintain a growth rate of 15-20% in 2012-2015 .
But from a technical point of view, in fact, in the past 10 years or so, the LED display screens launched by most manufacturers have not changed much in the basic system architecture, but have only made certain technical indicators to a certain extent. Improvements and fixes. At the same time, the popularity and promotion of high-performance products is relatively lagging behind, although display driver IC products with PWM (pulse width modulation) functions have been launched on the market as early as a few years ago, and market participants have also recognized the PWM function. It has the advantages of high refresh rate and constant current, but due to factors such as price, the market share of this type of high-performance display driver IC is still not high so far, and the basic models are mostly used in the market (such as Accumulation 5024/ 26, etc.), high-end products are mainly used in some LED screen rental markets that pay more attention to quality. High-end driver IC products with PWM function will become the main force to promote market development, and make the color of LED screen richer, and the image more delicate and smooth.
However, with the rapid development of the current LED electronic screen market, more and more users have begun to put forward a series of complex requirements for LED display screens from visual effects, transmission methods, display methods, and playback methods, which also makes LED planar displays Electronic screen products are facing a new opportunity for technological innovation, and as the "brain" of the overall display system - LED driver IC will play an important role.
Strengthen industry cooperation to break through technical bottlenecks
The data transmission between the LED electronic screen and the main board generally adopts the serial data transmission method (SPI), and then transmits the display data and control data synchronously through the signal packet multiplexing technology, but when the refresh rate and resolution increase Under the circumstances, it is easy to cause the bottleneck of data transmission and lead to the instability of the system. In addition, when the screen area of the LED display is large, the control line is often very long, which is susceptible to electromagnetic interference and affects the quality of the transmitted signal. Although some manufacturers have introduced new transmission media in recent years, how to provide users with truly excellent performance and cost-effective product solutions is a key issue that plagues the industry. For this reason, some manufacturers have proposed that the data transmission method of LED display screens urgently needs to start from the lowest technical level to find an innovative solution.
For example, currently some driver IC manufacturers try to use standard CMOS process technology to install high-speed LVDS circuits, so that complex digital functions can be easily integrated into LVDS analog circuits, and the serializer and deserializer are integrated in the same chip. LVDS transmission technology has 330mV low-voltage differential signal (250mVMINand450mVMAX) and fast transition time, allowing products to achieve high data rates from 100Mbps to over 1Gbps; at the same time, this low voltage swing and output mode of the differential circuit can effectively reduce Electromagnetic interference (EMI) is eliminated, and the reliability of signal transmission is ensured.
It is worth noting that the technological innovation of LED electronic screens has involved all links of the industrial chain, including the improvement of the driver IC manufacturing process, the hardware of the control system, the intelligent development of the control software, etc. These technological innovations require IC design manufacturers , control system developers, panel manufacturers, and even end users are more closely integrated together to break the "deadlock" in industry applications. Especially in the development of the control system, how to better cooperate with the IC design company to improve the system performance of the LED screen and the intelligent level of the control software is a top priority.
In order to further promote the combination of IC design and control system development, it is understood that there are currently leading manufacturers of LED electronic screen driver ICs that have launched more in-depth research in the field of control system development through mergers and acquisitions, alliances and other forms. explore. For example, Taiwan Polymer invested in Jinxin Optoelectronics in the past few years to establish an integrated thinking of terminal applications and IC design; in addition, they recently launched a plan called "Platinum Certification", which aims to unite a group of excellent companies in the industry Controller manufacturers, better match their controllers with accumulated chips, and present high-definition display effects for users as a whole.
However, with the rapid development of the current LED electronic screen market, more and more users have begun to put forward a series of complex requirements for LED display screens from visual effects, transmission methods, display methods, and playback methods, which also makes LED planar displays Electronic screen products are facing a new opportunity for technological innovation, and as the "brain" of the overall display system - LED driver IC will play an important role.
Strengthen industry cooperation to break through technical bottlenecks
The data transmission between the LED electronic screen and the main board generally adopts the serial data transmission method (SPI), and then transmits the display data and control data synchronously through the signal packet multiplexing technology, but when the refresh rate and resolution increase Under the circumstances, it is easy to cause the bottleneck of data transmission and lead to the instability of the system. In addition, when the screen area of the LED display is large, the control line is often very long, which is susceptible to electromagnetic interference and affects the quality of the transmitted signal. Although some manufacturers have introduced new transmission media in recent years, how to provide users with truly excellent performance and cost-effective product solutions is a key issue that plagues the industry. For this reason, some manufacturers have proposed that the data transmission method of LED display screens urgently needs to start from the lowest technical level to find an innovative solution.
For example, currently some driver IC manufacturers try to use standard CMOS process technology to install high-speed LVDS circuits, so that complex digital functions can be easily integrated into LVDS analog circuits, and the serializer and deserializer are integrated in the same chip. LVDS transmission technology has 330mV low-voltage differential signal (250mVMINand450mVMAX) and fast transition time, allowing products to achieve high data rates from 100Mbps to over 1Gbps; at the same time, this low voltage swing and output mode of the differential circuit can effectively reduce Electromagnetic interference (EMI) is eliminated, and the reliability of signal transmission is ensured.
It is worth noting that the technological innovation of LED electronic screens has involved all links of the industrial chain, including the improvement of the driver IC manufacturing process, the hardware of the control system, the intelligent development of the control software, etc. These technological innovations require IC design manufacturers , control system developers, panel manufacturers, and even end users are more closely integrated together to break the "deadlock" in industry applications. Especially in the development of the control system, how to better cooperate with the IC design company to improve the system performance of the LED screen and the intelligent level of the control software is a top priority.
In order to further promote the combination of IC design and control system development, it is understood that there are currently leading manufacturers of LED electronic screen driver ICs that have launched more in-depth research in the field of control system development through mergers and acquisitions, alliances and other forms. explore. For example, Taiwan Polymer invested in Jinxin Optoelectronics in the past few years to establish an integrated thinking of terminal applications and IC design; in addition, they recently launched a plan called "Platinum Certification", which aims to unite a group of excellent companies in the industry Controller manufacturers, better match their controllers with accumulated chips, and present high-definition display effects for users as a whole.
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