240
11 Applications of LEDs
Fig. 11.6 A LED display sample with pixel size of P0.5 based on COB packaged devices
light processing-based projection technology) mosaic screen, its application platform is more flexible and reliable, easy to maintain, and flexible application environment. Manufacturers from both China and foreign countries usually use surface
mount packaging technology to complete high-density LED dot matrix screen which
involves PCB board, SMD and driver IC content. With the gradual reduction of the
pitch size of LED full-color display screens, SMD LEDs are gradually replaced
by ultra-small RGB integrated devices. In 2014, Everlight launched their ultra-small
RGB LED products. Based on such product, pixel size of the LED screen was close to
the 1.0 mm. In the field of small-size RGB full-color packaging, we have proposed
LED matrix based on COB packaging for decreasing pixel size as illustrated in
Fig. 11.6.
As an emerging technology, LED display technology also has certain shortcomings such as the need to improve display uniformity, especially at the edge of each
module to ensure the flatness of large-area screen.
11.3.4 Wide Color Gamut LED Back Light Technology
With the progress of compound semiconductors, especially the rapid development of
wide-bandgap compound semiconductors in recent years, the development of materials, device processes and their application technologies have ensured the semiconductor light-emitting diodes to cover the entire visible spectra range. As we know,
LED has the advantages of rich color, high efficiency, small size and long lifetime.
11 Applications of LEDs
Fig. 11.6 A LED display sample with pixel size of P0.5 based on COB packaged devices
light processing-based projection technology) mosaic screen, its application platform is more flexible and reliable, easy to maintain, and flexible application environment. Manufacturers from both China and foreign countries usually use surface
mount packaging technology to complete high-density LED dot matrix screen which
involves PCB board, SMD and driver IC content. With the gradual reduction of the
pitch size of LED full-color display screens, SMD LEDs are gradually replaced
by ultra-small RGB integrated devices. In 2014, Everlight launched their ultra-small
RGB LED products. Based on such product, pixel size of the LED screen was close to
the 1.0 mm. In the field of small-size RGB full-color packaging, we have proposed
LED matrix based on COB packaging for decreasing pixel size as illustrated in
Fig. 11.6.
As an emerging technology, LED display technology also has certain shortcomings such as the need to improve display uniformity, especially at the edge of each
module to ensure the flatness of large-area screen.
11.3.4 Wide Color Gamut LED Back Light Technology
With the progress of compound semiconductors, especially the rapid development of
wide-bandgap compound semiconductors in recent years, the development of materials, device processes and their application technologies have ensured the semiconductor light-emitting diodes to cover the entire visible spectra range. As we know,
LED has the advantages of rich color, high efficiency, small size and long lifetime.