OLED display?? The new favorite of the future car display system
Opportunities and Challenges:
* In the future, with the car navigation system becoming the standard for automobiles, the proportion of the new car equipped with the display, that is, the proportion of the original market will gradually increase.
*Liquid crystal display technology is limited by the influence of ambient temperature, which limits the application field of vehicle display products.
*Make LCD screen|The liquid crystal material of the display device will become liquid when the ambient temperature is too high, and will become crystal when the temperature is too low.
related data:
*The rear matching market is currently the largest market, about 20 times the original market
*In various applications of OLED panels, the automotive audio application market in 2005 accounted for 3% of total shipments, with an output value of 11%.
The complexity and information density of automotive information systems is increasing, which makes the internal display of the car no longer just a basic centralized instrument | meter display, but to meet the needs of more and more detailed and diverse information display in the car. The on-board display market is divided into car navigation devices, car TVs, and in-vehicle information systems according to the application; it is divided into original and post-installed two market-based original markets according to the assembly time, which requires strict certification, and it is difficult to enter; Certification is currently the largest market, about 20 times the original market. In the future, as car navigation systems become the standard for automobiles, the proportion of new cars equipped with displays, that is, the proportion of the original market will gradually increase.
The display products required by automotive electronics have high requirements for environmental adaptability. The performance indicators of the commonly used vehicle display screens are: brightness 20-60 nit, normal temperature working life 50,000 hours, and temperature tolerance range -40 to 85 °C. In the North American automotive display market, VFDs (Vacuum Fluorescent Displays) have long been popular because of their excellent brightness to ensure good visibility. However, with the rise of OLED and LCD liquid crystal display technology, VFD is gradually losing its advantage. Because VFD power consumption, full color and resolution are greatly limited.
Lcd liquid crystal display technology is gradually applied in the field of vehicle display. However, due to the influence of ambient temperature, liquid crystal display technology limits the application field of vehicle display products. The liquid crystal material used to make the liquid crystal display will become a liquid when the ambient temperature is too high, and will become a crystal when the temperature is too low. No matter which state is changed, the liquid crystal material no longer has a photoelectric effect that can be controlled by the electric field. As a result, the liquid crystal display does not work properly. In addition, the contrast, viewing angle, and response speed of the liquid crystal display also change with temperature. Therefore, the liquid crystal is not a good display mode for a vehicle display with a large environmental change.
Compared with mature TFT-LCDs, OLED (Organic Electroluminescence Display Technology) is an active light-emitting display with high contrast, wide viewing angle (up to 170?), fast response (~1μs), high luminous efficiency, low operating voltage (3 ~ 10V), ultra-thin (thickness less than 2mm) and other advantages. The on-board display made by OLED technology can have a lighter and thinner appearance, better color display quality, wider viewing range and greater design flexibility. What is more important is that the OLED environment adaptability is far superior to The liquid crystal display can withstand a temperature range of -40 to 85 °C. And OLED does not contain lead and will not pollute the environment. Therefore, the Oled display application has great advantages in the automotive field.
DisplaySearch's research report shows that in various applications of OLED panels, the automotive audio application market in 2005 accounted for 3% of total shipments, with an output value of 11%, occupying a major share of the high-end application market. In fact, Ford's Aston ??? Martin K9, Grand Cherokee Jeep and Chevrolet Corvette have adopted a monochrome OLED small-molecule passive matrix display that can work 30,000 hours before the brightness drops to 80% of the original brightness. .
Market research firm ABIResearch believes that the Oled display brings great advantages to automakers. They don't need to perforate wiring in the car as they used to, they can quickly install the car dashboard lighting system, and OLED technology can give high-end luxury cars. Bringing the perfect feeling, for luxury car manufacturers and dealers, this means significant savings while making consumers more satisfied.
At present, the lifetime of OLED has been greatly improved, and the lifetime of 40,000 to 50,000 hours in the conventional environment has been comparable to the lifetime of TFT-LCD. Japan's Pioneer was the first manufacturer to have Oled products on the market. As early as 1997, monochrome OLEDs were applied to car audio. In 2004, the full-color series of OLED audio was first introduced. The in-vehicle display OLED products introduced by other companies have a working temperature range of -40 to 85 °C, and the life of monochrome products has reached 55,000 hours (70 nit) and 50,000 hours (80 nit). The operating temperature of the on-board chip is still further improved. in.
Visionox and Tsinghua University have long been engaged in the development of high-resistance, high-reliability, long-life OLED devices. In 2008, the company successfully developed the "Shenqi" extra-space aerospace OLED display, which is the world's first OLED application in the aerospace field. . Recently, Visionox has developed the in-vehicle display OLED for the special requirements of the automotive and other fields, and has conducted in-depth research on the wide temperature adaptability of OLEDs, and has developed a new OLED that can adapt to extremely high and extremely low temperature changes. product.
This product has a life expectancy of more than 50,000 hours under normal temperature environment of 100 nit. It can adapt to temperature changes of -40 to 85 °C, and can work normally for a long time even at low temperature of -50 °C and high temperature of 90 °C, exceeding the performance indexes of similar products in the vehicle market. The new in-vehicle display products using this technology will soon be fully launched to meet the product needs of the majority of car manufacturers and car enthusiasts.
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Figure 1: Global car display panel market size statistics.
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Figure 2: Japan Pioneer car audio products DEH-P7800MP (65K color, 256 × 64).
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Figure 3: Example: Car OLED display product developed by Visionox (monochrome, 128×64).
* In the future, with the car navigation system becoming the standard for automobiles, the proportion of the new car equipped with the display, that is, the proportion of the original market will gradually increase.
*Liquid crystal display technology is limited by the influence of ambient temperature, which limits the application field of vehicle display products.
*Make LCD screen|The liquid crystal material of the display device will become liquid when the ambient temperature is too high, and will become crystal when the temperature is too low.
related data:
*The rear matching market is currently the largest market, about 20 times the original market
*In various applications of OLED panels, the automotive audio application market in 2005 accounted for 3% of total shipments, with an output value of 11%.
The complexity and information density of automotive information systems is increasing, which makes the internal display of the car no longer just a basic centralized instrument | meter display, but to meet the needs of more and more detailed and diverse information display in the car. The on-board display market is divided into car navigation devices, car TVs, and in-vehicle information systems according to the application; it is divided into original and post-installed two market-based original markets according to the assembly time, which requires strict certification, and it is difficult to enter; Certification is currently the largest market, about 20 times the original market. In the future, as car navigation systems become the standard for automobiles, the proportion of new cars equipped with displays, that is, the proportion of the original market will gradually increase.
The display products required by automotive electronics have high requirements for environmental adaptability. The performance indicators of the commonly used vehicle display screens are: brightness 20-60 nit, normal temperature working life 50,000 hours, and temperature tolerance range -40 to 85 °C. In the North American automotive display market, VFDs (Vacuum Fluorescent Displays) have long been popular because of their excellent brightness to ensure good visibility. However, with the rise of OLED and LCD liquid crystal display technology, VFD is gradually losing its advantage. Because VFD power consumption, full color and resolution are greatly limited.
Lcd liquid crystal display technology is gradually applied in the field of vehicle display. However, due to the influence of ambient temperature, liquid crystal display technology limits the application field of vehicle display products. The liquid crystal material used to make the liquid crystal display will become a liquid when the ambient temperature is too high, and will become a crystal when the temperature is too low. No matter which state is changed, the liquid crystal material no longer has a photoelectric effect that can be controlled by the electric field. As a result, the liquid crystal display does not work properly. In addition, the contrast, viewing angle, and response speed of the liquid crystal display also change with temperature. Therefore, the liquid crystal is not a good display mode for a vehicle display with a large environmental change.
Compared with mature TFT-LCDs, OLED (Organic Electroluminescence Display Technology) is an active light-emitting display with high contrast, wide viewing angle (up to 170?), fast response (~1μs), high luminous efficiency, low operating voltage (3 ~ 10V), ultra-thin (thickness less than 2mm) and other advantages. The on-board display made by OLED technology can have a lighter and thinner appearance, better color display quality, wider viewing range and greater design flexibility. What is more important is that the OLED environment adaptability is far superior to The liquid crystal display can withstand a temperature range of -40 to 85 °C. And OLED does not contain lead and will not pollute the environment. Therefore, the Oled display application has great advantages in the automotive field.
DisplaySearch's research report shows that in various applications of OLED panels, the automotive audio application market in 2005 accounted for 3% of total shipments, with an output value of 11%, occupying a major share of the high-end application market. In fact, Ford's Aston ??? Martin K9, Grand Cherokee Jeep and Chevrolet Corvette have adopted a monochrome OLED small-molecule passive matrix display that can work 30,000 hours before the brightness drops to 80% of the original brightness. .
Market research firm ABIResearch believes that the Oled display brings great advantages to automakers. They don't need to perforate wiring in the car as they used to, they can quickly install the car dashboard lighting system, and OLED technology can give high-end luxury cars. Bringing the perfect feeling, for luxury car manufacturers and dealers, this means significant savings while making consumers more satisfied.
At present, the lifetime of OLED has been greatly improved, and the lifetime of 40,000 to 50,000 hours in the conventional environment has been comparable to the lifetime of TFT-LCD. Japan's Pioneer was the first manufacturer to have Oled products on the market. As early as 1997, monochrome OLEDs were applied to car audio. In 2004, the full-color series of OLED audio was first introduced. The in-vehicle display OLED products introduced by other companies have a working temperature range of -40 to 85 °C, and the life of monochrome products has reached 55,000 hours (70 nit) and 50,000 hours (80 nit). The operating temperature of the on-board chip is still further improved. in.
Visionox and Tsinghua University have long been engaged in the development of high-resistance, high-reliability, long-life OLED devices. In 2008, the company successfully developed the "Shenqi" extra-space aerospace OLED display, which is the world's first OLED application in the aerospace field. . Recently, Visionox has developed the in-vehicle display OLED for the special requirements of the automotive and other fields, and has conducted in-depth research on the wide temperature adaptability of OLEDs, and has developed a new OLED that can adapt to extremely high and extremely low temperature changes. product.
This product has a life expectancy of more than 50,000 hours under normal temperature environment of 100 nit. It can adapt to temperature changes of -40 to 85 °C, and can work normally for a long time even at low temperature of -50 °C and high temperature of 90 °C, exceeding the performance indexes of similar products in the vehicle market. The new in-vehicle display products using this technology will soon be fully launched to meet the product needs of the majority of car manufacturers and car enthusiasts.
Figure 1: Global car display panel market size statistics.
Figure 2: Japan Pioneer car audio products DEH-P7800MP (65K color, 256 × 64).
Figure 3: Example: Car OLED display product developed by Visionox (monochrome, 128×64).
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