With the continuous breakthrough of technology, the production cost gap between Mini LED and traditional LCD is gradually narrowing, and consumer electronics backlight display will be transformed from LCD to Mini LED. According to LEDinside, the market size of Mini LED backlight products will exceed US$1 billion by 2023.

At present, Mini LED and OLED are on par in the mid-to-high-end market. Who will be the ultimate winner? After several years of development, OLED technology has the characteristics of high contrast and rich colors in imaging, but there are still problems such as short lifespan and burn-in after-image after long-term use. Mini LED is similar to OLED in image quality, but it has more advantages in resolution and solution implementation. Mini LED can achieve 8K resolution and be applied to large-size displays. At present, 65-inch applications are still the one that OLED cannot break through. Hom.

Mini LED has gradually become the mainstream of the display industry. Giants such as Huawei, Samsung, and Apple have entered the Mini LED market and adopted Mini LED as their display solution. Program. In the past two years, the size of the Mini LED market has risen sharply, and the competition in the Mini LED chip market has been fierce. Upstream chip manufacturers have accelerated their industrial layout and expanded their industrial scale to meet market demand.

What achievements have domestic manufacturers achieved in the field of Mini LED chips?

Sanan Optoelectronics is the largest Mini LED driver chip manufacturer in China, with a market share of about 30%. As early as 2018, Sanan Optoelectronics has entered the Samsung supply chain and supplied Mini LED driver chips for Samsung in batches. According to the financial report of Sanan Optoelectronics in the first half of the year, revenue in the first half of the year reached 6.114 billion yuan, a year-on-year increase of 71.38%.

HC Semitek’s LED chip production capacity ranks second in the world, and HC Semitek’s business covers LED chips, LED epitaxial wafers, sapphire substrates and other fields. As early as 2019, it has established the focus of adjusting the industry, focusing on the deployment of the Mini/Micro LED industry, and impacting the high-end display market. At present, Huacan Optoelectronics has reached a cooperative relationship with Huawei in the Mini LED chip business with its high mass production capacity and advanced process technology. The smart screen V75 Super released by Huawei previously uses Sanan Optoelectronics Mini LED chips. According to HC Semitek's first-half financial report, revenue in the first half of the year was 1.594 billion yuan, a year-on-year increase of 49.20%, of which Mini LED product revenue increased by 140% year-on-year.

Eagle Eye Series 48-Channel S-PWM Constant Current Mini LED Driver Chip

Macroblock's LED driver chips are quite influential in the entire LED market, and have researched in the field of LED backlighting and LED lighting. Macroblock has actively deployed the Mini LED driver chip market. At present, the LED driver chip has achieved mass production. According to the official annual report, revenue in August was NT$344 million, a year-on-year increase of 141.0% compared to August last year.

MBI5759 is an S-PWM LED driver chip with integrated 32 scan switches and 48 constant current source outputs. The overall size of the BAG package is small, which is convenient for design and layout. MBI5759 can realize multi-pulse adjustment function for gray-scale control, and can also divide the on-time into multiple shorter on-times to increase the output imaging refresh rate. In order to nearly double the refresh rate, a global clock frequency multiplier has been added. technology. The chip also integrates a 48-bit shift register, each unique register can convert the input serial data into grayscale pixel output. The 48 constant current output values ​​of MBI5759 are not affected by the load voltage, and the output current can be changed by an external resistor. In terms of imaging, S-PWM can solve the problem of screen stroboscopic, and the MBI5759 chip can adjust the corresponding output brightness by processing video data. The advantage of this chip is that it has a new generation of data transmission interface to reduce the wiring between the control chip and the driver chip to reduce EMI interference, and a built-in intelligent power saving mode to reduce system power consumption.

Low power consumption, high refresh rate Mini LED driver chip

With the increasing pixel density of narrow pixel pitch LED displays and Mini & Micro-LED products, higher performance LED driver chips are urgently needed to face this challenge. TI has developed a Mini LED driver chip TLC6983 for this purpose. This chip has ultra-high integration to meet the small space constraints inside the chip, ultra-low power to minimize power consumption, and higher video imaging. high refresh rate, low EMI impact, and excellent display performance to meet the ever-increasing demand for display quality.

TLC6983 is a highly integrated MINI LED display driver chip with 48 constant current sources and 16 scan FETs. A single TLC6983 can drive 16 × 16 RGB LED pixels, while stacking two TLC6983s can drive 32 × 32 RGB LED pixels. To achieve low power consumption, the device supports separate power supplies for red, green, and blue LEDs through its common cathode structure. In addition, the TLC6983 operates at such low power that it can operate normally at a low voltage, low current with an operating voltage of 2.5V and an operating current of 3.9mA.

The TLC6983 has a built-in dual-edge high-speed transmission interface that supports higher serial interfaces and high refresh rates while minimizing electromagnetic interference (EMI). The frequency of the external serial clock circuit of the chip is 25 MHz, and the internal serial clock circuit is 160 MHz. At the same time, the TLC6983 MINI LED driver chip has added an intelligent algorithm to optimize the image quality problem of MINI LED display and imaging. Using this driver chip can perfectly solve the problems of insufficient picture brightness, ghosting, low grayscale unevenness and other problems that occur when using traditional chips. . The chip is mainly used in narrow pixel pitch (NPP) LED displays and Mini/Micro LED displays.


Mini LED makes up for many performance deficiencies of OLED. Big companies such as Apple and Huawei have now adopted Mini LED as the display solution for their new generation products. The Mini LED market is unprecedentedly prosperous. Only the domestic upstream market is showing a situation where a hundred schools of thought contend. Sanan Optoelectronics , Huacan Optoelectronics, etc. have already laid out the market, and have achieved mass production of Mini LED driver chips. With the maturity of technology and the reduction of production cost, Mini LED may replace OLED and become the mainstream in the future.

Responsible editor: haq

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