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Display equipment backlight module technology gradually mature

2020.12.11

In 2020, China's backlight module industry demand status and development trend analysis products tend to ultra-thin development. At present, the input device backlight module is mainly used in the luminescent keyboard of notebook computer. In the future, with the clear differentiation of notebook PC positioning and the stability of the commercial notebook market, notebook PC market shipments will gradually remain stable. As a key component of LIQUID crystal display equipment, the development of backlight module industry of display equipment is closely related to the development of liquid crystal display equipment industry. In recent years, the LCD industry chain in mainland China has become more and more complete, and the production technology of backlight modules for display equipment has become more and more mature with the development of the LCD panel industry.


Input backlight module permeability is expected to increase


 

The light guide structure and components mainly include light guide film, backlight module and other products. Their main function is to convert point light source into surface light source by refracting and reflecting parallel light from LED light source, so as to make the input equipment of consumer electronics products, LIQUID crystal display equipment, lighting equipment and other designated areas glow. The backlight module is a component product with the light guide film as the core basic component. According to its downstream application fields, it can be divided into input equipment backlight module, display equipment backlight module, lighting equipment backlight module, etc.

 

Figure 1: Backlight module industry chain


The input device backlight module is mainly used in the light-emitting keyboard of notebook computer. When the computer receives the keystroke instruction, the computer switches on the light-emitting signal of LED through the instruction control. At present, the luminescence principle of the notebook computer on the market mainly includes two ways: using LED as the light source directly and emitting light through "LED+ light guide film (board)". In addition, the input device backlight module is also applied in the fields of desktop luminous keyboard, tablet computer external leather keyboard, function phone keyboard, smart phone backlight button and so on.


At present, the input device backlight module is mainly used in the luminescent keyboard of notebook computer. As a necessity of daily life and work, notebook computer is featured with significant "rigid" demand in both the business application market and the home application market, and the consumption demand is very stable. 



After a period of rapid growth in the global notebook market from 2003 to 2011, the incremental demand of the market began to decline, and the shipments from 2012 to 2018 kept fluctuating between 160 million and 190 million units. Global notebook PC shipments rebounded in 2017, benefiting from orders from the North American notebook market and a recovery in the regional economy, according to IDC. In the future, with the clear differentiation of notebook PC positioning and the stability of the commercial notebook market, notebook PC market shipments will gradually remain stable.


 

 Table 2: Global notebook PC shipments (in million units) 2005-2019


Keyboard backlight module, as an important component of notebook computer luminous keyboard, is mainly used in middle and high-end notebook computers due to its relatively high production cost. According to the development trend of the industry and the demand for the use of notebook computers, notebook computers use feeling increasingly become consumer attention indicators, the keyboard as the main input device of notebook computers, is becoming a terminal brands create differentiation, creating sense of science and technology, enhance the user experience of the important points of market penetration of the glow laptop keyboard in the future will gradually improve, gradually become the standard laptop keyboard. The development trend of input device backlight modules is as follows:

 

Market penetration is gradually expanding. The input device backlight module, as an important component of the laptop luminescent keyboard, is mainly used in middle and high-end notebook computers due to its relatively high production cost. According to the development trend of the industry and the demand for the use of notebook computers, notebook computers use feeling increasingly become consumer attention indicators, the keyboard as the main input device of notebook computers, is becoming a terminal brands create differentiation, creating sense of science and technology, enhance the user experience of the important points of market penetration of the glow laptop keyboard in the future will gradually improve, gradually become the standard laptop keyboard.

 

Micro - nano - hot - imprint lithography production process gradually popularized. Micro-nano hot pressing technology is a new light-emitting point pressing technology that has developed rapidly in recent years. Different from the traditional ink printing technology (whose principle is to reflect light on the ink to achieve the purpose of light conduction), micro-nano hot pressing technology has lower production cost and avoids the environmental pollution caused by ink printing technology. The light-conducting film produced by micro-nano hot stamping technology has the advantages of high dot precision, high luminance, uniform luminance, good visual effect, stable performance, stable quality, high yield rate, environmental protection and so on. Only a few LED beads are needed to make the whole keyboard shine evenly. In the future, there will be more and more input equipment backlight modules produced by micro and nano hot stamping technology on the market.

 

The product is ultrathin. In the early days, most of the backlight sources of consumer electronics and household appliances came from different types of lights. For example, nokia initially backlit the keypad of its mobile phones by placing LED beads at the bottom of the keypad. The disadvantage of this method is that the luminescence is not uniform and the energy consumption is high, which is solved by the appearance of light conducting film. Manufacturers can use a small number of lights to make the phone's keypad glow evenly, reducing size and weight and power consumption. The light guide film can be placed in a narrow space due to its thin volume and uniform luminescence. Compared with the traditional point light source backlight, it is lighter, environmentally friendly and energy saving. With the development of consumer electronics, especially mobile phones, towards lightness and quality, the light-conducting film itself will also develop towards high brightness and ultra-lightness.



 

 

Figure 3: Trends in input device backlight modules 


Display equipment backlight module technology gradually mature 


The backlight module of display equipment can be divided into LED backlight module, CCFL(cold cathode tube fluorescent lamp) backlight module and EL(electroluminescence) backlight module according to the type of light source. As a key component of LIQUID crystal display equipment, the development of backlight module industry of display equipment is closely related to the development of liquid crystal display equipment industry. In recent years, the LCD industry chain in mainland China has become more and more complete, and the production technology of backlight modules for display equipment has become more and more mature with the development of the LCD panel industry. In recent years, the LCD industry chain in mainland China has become more and more complete, and the production technology of backlight modules for display equipment has become more and more mature with the development of the LCD panel industry.

 

Large LCD panels are mainly used in information products, such as laptop computers and computer monitors. Consumer products such as LCD TELEVISIONS, smart phones, tablets; Other applications include airport information billboards, outdoor advertising billboards, industrial computers, aviation dashboards, medical panels, and so on. In 2016, global SHIPMENTS of LIQUID crystal panels reached 12.11 million; As Korea controls LCD panel production capacity, global LCD panel shipments declined, with about 11.43 million units shipped in 2019, down 5.30% year on year. 

Chart 4:2016-2019 Global SHIPMENTS of LIQUID Crystal Panels (UNIT: 10,000)

 

LCD panel industry belongs to capital-intensive, technology-intensive, labor-intensive three high industries, its "three high barriers" will be the majority of new producers at the door. Currently, LCD panels are dominated by South Korea, China and Taiwan. The main manufacturers of LCD panels are Samsung, LG, Innolux, AU, ZHonghua, BOE and Shenzhen Tianma. In 2019, BOE ranked first in global LCD panel shipments, with 345,000 white pieces; Followed by LG Display, with 315,000; Au, Innolux, Samsung and CLP Panda made the top six.  

Table 5: TOP6 global LCD panel shipments in 2015 (in million units)

 

As the boe, tianma micro, huaxing photoelectric, CLP giant pandas, such as domestic liquid crystal display panel LCD display equipment production line layout, increase the high generation capacity will gradually release the liquid crystal display (LCD) devices, scale of industry as a whole will also continue to expand, this will help our country local cell (liquid crystal display (LCD) devices, especially the display device to the long-term development of the backlight module suppliers. With the increasing demand of consumers for the appearance design and product performance of display equipment, the backlight display module industry will develop towards the direction of large size, ultra-thin, narrow frame and high brightness in the future.