ALPD Introduction

“Advanced Laser Phosphor Display” is condensed to ALPD . It uses blue laser based on GaN to stimulate the moving fluorescent materials to produce one or more primary colors, applied to image display.It is the core technology forhigh brightness image display.

Traditional image display devices adopt HID bulb light source to display colorful images. But these bulbs have shortcomings, e.g. short lifetime, inefficiency, containing hazardous substances, etc. As LED was invented, it was applied to image display devices quickly, such as TV, because of its high efficiency and long lifetime. LED has a continuous progress, and provides a bigger luminous flux but is limited by the bigger etendue.It could not meet the need of high luminance display, what’s more, it is lower than some traditional bulbs, such as high pressure mercury lamps used in the traditional projector. Laser has good directivity, and laser spot can focus on a mini spot (the smallest is up to several microns). Its luminance increases not only 100~1000 times than that of LED but has a greater promotion than the high pressure mercury lamps. However, its high cost, lower photoelectric conversion rate and lower reliability limits the laser’s application in the display field.

ALPD  technique retains the high luminance advantage of traditional laser, while adopting the basic technology that integrate fluorescent materialsinto blue light like LED,with the creatively addition ofthe remote rotating fluorescent device It, resolves the problem of extinction,and with the stimulation of high density laser, still keeps a high conversion rate.

It uses the fluorescent materials of GaN blue laser, YAG and nitrides, maintaining the advantages of LED with high reliability and long lifetime.

ALPD laser source keeps the advantages of both traditional laser and LED, and resolves their problems. It is an overthrow to the new light source, and it is a breakthrough in lighting technology history.


Just as 100 inch laser TV shown in CES in2013, brings a great impact on the industry, ALPD  with its unique superior technology produces an entirely new user visual experience.Its main features are listed as below:

ALPD laser source is the new generation of laser source. Compared with devices with an LED source, its luminance is a great improvement.

At present, the luminance of a single projector could be up to 50000 lm, much higher than 2000 lm of the LED projector.

Different from the traditional laser, ALPD laser sourceuses GaN blue laser and high reliability fluorescent glowing materials, it has the same high reliability and long lifetime (up to 60000 hours) asLED. What’s more, aiming at the air quality of different environments in different regions of the world, ALPD  laser source adopts a full dust-proof design to protect optical lighting and imaging. Even in a bad conditions it will be low maintenance, and will save operating and maintenance cost.

ALPD laser source uses GaN blue laser and fluorescent glowing materials with high reliability, it has the same cost structure as LED and its cost is sharply reduced compared to the traditional laser. In the design of the remote rotating fluorescent structure, ALPD® uses the least components to realize the fluorescent conversion and obtains the patent based on the technique itself. ALPD  has lower costs compared with the imitating ALPD® laser products in the market.

ALPD laser source module design, decreases the components quantity as far as it possible, so the size of the whole display device is largely reduced. For instance, comparing mini projectors using the same display IC (DLP of TI), the size of an ALPD  laser product is 50% of that of similar products with LED source, and the luminance is promoted to 200%.

     ALPD laser source uses GaN blue laser and fluorescent glowing materialshigh reliability, has the same cost structure as LED, and its cost   is sharply reduced than the traditional laser. In the design of        the remoterotating fluorescent structure, ALPD  uses the least components   to realize the fluorescent conversion and obtains the patent based on the technique itself. ALPD has lower cost comparing  with the  imitating ALPD  laser products in the market.

The color of ALPD  laser source meet the DCI-P3 criterion established by Hollywood for the playing of digital movies and the ITU REC709 criterion of HDTV. It can display true images exactly and in full. In its entire lifetime, the attenuating range in image quality of the ALPD  source is very small, enabling its output to keep a high brightness, high color saturation and contrast for a long time. The screen color is as brilliant as it was at purchase.

      ALPD  has the features of high luminance, long life, excellent image quality and it provides an efficient, low cost and green solution, so driving the development of thehigh luminance image display.

Comparison of common light source in DLP rear projection system



ALPDlaser source


900(1600Double lamps)★★★★

1000 ★★★


Color gamut (NTSC)

70%~80% ★★★

120% ★★★★★

90%~150% ★★★★★

Average life(h)


60000 ★★★★★

40000-60000 ★★★★

Color wheel average no-failure time(h)

20000 ★★★

None ★★★★★

20000 ★★★

Color drift time(h)

5000 ★★★★★

3000 ★★★

5000 ★★★★★


Low ★★★★★

high ★★★

higher ★★★★

ALPD  technique has been applied to various display products with high luminance:

  • Projector: ALPD  has been applied to projectors. CASIO produced the XJ-A130 projector in June 2010 which adopted the ALPD  technique of Appotronics.This technology was quickly adopted in the projection industry.
  • TV: ALPD  is alsowidely used in large screen TV’s. In June 2013, Korea LG cooperated with Appotronics to develop Hecto TV,  which adopted the ALPD technique. The products has attracted much attention.
  • Digital cinema: ALPD has been applied to high luminance projectors in digital cinemas. More ALPD projectors with high luminance are being developed.ALPD  technique and its derivatives are becoming more and more important to the technology of the industry. Moreover they are being extended and applied to new fields.