Understanding OLED, QLED, OLET, IMOD, LPD Future Display Technology

OLED display technology is widely used in mobile phone, digital video camera, DVD player, personal digital assistant(PDA), notebook computer, car audio and television.

Organic Light Emitting Diode(OLED)

Organic light emitting diode(OLED) is a display technology which developed and patented by Kodak. This technology uses organic polymer material as semiconductor material in light emitting diodes. Polymeric materials can be natural or synthetic, can be in large size or small size. Proteins and DNA are both examples of organic polymers.

OLED display technology is widely used in mobile phone, digital video camera, DVD player, personal digital assistant(PDA), notebook computer, car audio and television. The OLED display is thin and light because it does not use the backlight. It has a wide screen view of up to 160 degrees as well, and its operating voltage is two to ten volts.

The emitting layer of OLED is relatively light, so its base layer can use flexible material instead of rigid material. The OLED does not require the backlight system in LCD. When the LCD is working, it will selectively block some of the backlight areas so that the image will appear, while the OLED will emit light by itself. Because OLED does not require backlight system, they consume less power than LCD (most of the power consumed by LCD is used in backlight system).

Based on the new technology of OLED, Flexible Organic Light Emitting Display(FOLED) technology, it may make the highly portable and collapsible display technology become possible in the future.

However, recently, “Printed OLED” becomes popular. The most common OLED printing technologies are Inkjet printing and Screen Printing. If OLED printing technology matures, it will be more conducive to mass production and promotion of OLED.




Quantum Dot Light Emitting Diodes(QLED)

QLED is the abbreviation of “Quantum Dot Light Emitting Diodes”.It’s core imaging materials are different from OLED’s (OLED is formed using small molecule organic light-emitting materials), and their quantum dots are composed of zinc, cadmium, selenium and sulfur atoms. These quantum dots are very small in size which only less than 10 nanometers, and even smaller than some bacteria. When quantum dots are stimulated by light or electricity, they will emit different colored light. This is the principle of QLED.

There are many advantages of QLED, including better contrast and wider color gamut. In addition, manufacturers can freely control each pixel through software and can control the display more flexibly.

The manufacturing process of the QLED does not require the use of the shadow mask, so there will be no reduction in accuracy. Quantum dots can also be hovered in liquids and deposited using a variety of techniques, including inkjet printing on very thin, flexible, or transparent substrates.

Organic Light Emitting Transistor (OLET)

The organic light emitting transistor is composed of three layers of materials. The bottom layer is a material that conducts electricity, the middle layer emits light when the electricity passes through, and the top layer controls the amount of light that passes through. The entire group of materials has a total thickness of only 62nm. There are still some voltage problems to overcome in the current technology, but OLET can be 2 to 100 times more efficient than OLED. In the future, OLET can be used on any display screen, and can even be used on chips instead of cooper to transmit signals.

Interferometer Modulator Display Technology (IMOD)

Interferometer Modulator display technology (IMOD): It is reflective display technology, a new display technology that enables the display of a mobile phone to be clear enough even when exposed to sunlight. The process of displaying colors is in the same way as the glitter of butterflies’ wings. A display device based on the IMOD technology does not require a backlight source. This display technology has significant low power consumption performance relative to other display technologies and can significantly extend the battery life of devices.

Laser Phosphor Display (LPD)

Laser Phosphor Display (LPD): It is Prysm’s unique display technology and large-size display platform. It is the core of all Prysm display solutions and represents the next generation of large-scale digital displays. LPD consists of the following major components: a laser engine, a laser processor and a fluorescent panel. LPD uses patented laser engines and phosphorescent phosphor panels to create breathtaking, life-size images with low-power solid-state lasers. LPD solution is fundamentally different from LED-based and LCD-based display solutions—the package configurations which includes LPD technology and other components—provide vivid, life-size image quality, incomparable viewing angles and the industry’s smallest environmental impact. Comparing with other digital technologies, LPD technology has the lowest operating cost and provides the most advanced functionality, superiority and use possibilities.