Do you distinguish between LCD, OLED, QLED
- Apr 21, 2018 -

                 

At this year's CES, smart TVs are still a subject of great concern. All public companies from all over the world are making new products and pushing new technologies, indicating to the global industry that this year's color TV market will develop in the future. In general, this CES TV display battle can be divided into OLED pie and QLED pie.


OLED camp


LG: 2017's OLED TVs mainly include the W7, G7, E7, C7 and B7 five series, of which B7 and C7 series has a stunning ultra-thin design, E7 and G7 series with glass design, W7 series belonging to LG SIGNATURE high-end appliances The camp is the newest OLED TV of this year's LG. The thickness of the TV is only 2.57mm, and it can be directly attached to the wall. “


Do you distinguish between LCD, OLED, QLED?


Skyworth: Skyworth used AR OLED TV S9D and 4-color 4K OLED TV S9-I as its core, and G6, G7 and S9300 as the main line to form a super OLED team. At the exhibition, it brought a double-sided OLED TV for the first time. Black technology is full and there are no dead ends.


Do you distinguish between LCD, OLED, QLED?


Sony: Sony released the first XBR-A1E Bravia 4K OLED TV at CES2017 and became the flagship television series for 2017. Sony officials stated that using OLED panels will enable TVs to present “unprecedented black levels, rich and vivid colors, high dynamic contrast, clearer images and wider viewing angles”.


Do you distinguish between LCD, OLED, QLED?


Panasonic: Panasonic introduced the second-generation OLED TV EZ1000 at CES 2017. Its strength lies in that it can output about two times the peak brightness of conventional OLED TVs, improving the shortness of brightness of OLED TVs, and it can provide even more. For the full DCI-P3 color space, rich details can be obtained in dark scenes through the HCX2 image processor.


Do you distinguish between LCD, OLED, QLED?


Samsung: Samsung released the new QLED series Q8C, Q9F and Q7 at CES 2017. QLED TV uses a new type of metal quantum dot material that not only accurately represents the DCI-P3 color space, but also is the world’s first TV with 100% color reproduction, and still exhibits sufficient performance at a peak brightness of 1,500 to 2,000 nits. detail.


Do you distinguish between LCD, OLED, QLED?


TCL: TCL has released high-end quantum dot products X2 and X3 TVs, as well as 3.9mm extremely thin quantum dot curved TVs and the world's first two concept products with LED packaged quantum dot technology products. X2 and X3 are made from the top quantum dot material, and the quantum dot pigment covers 110%, allowing people to see the true color of nature on television.


Do you distinguish between LCD, OLED, QLED?


LG: At the same time as ambition LG do OLED TV, but also miss QLED this piece of fat. At the CES show, LG introduced a new Super UHD series TV equipped with Nano Cell technology, which originated from quantum dot technology, including the SJ9500, SJ8500 and SJ8000 series models.


Do you distinguish between LCD, OLED, QLED?


Hisense: Hisense Group released a new 4K dual-color laser television before the CES 2017 exhibition, and officially announced the technical and product lines, announced QLED. Although this time did not bring the latest QLED products, but has said that a new generation of quantum dot display products will be officially listed in 2019.


The difference between LCD, OLED and QLED


The traditional TV display screens are mostly LCD screens. In recent years, with the development of new technologies, OLED screens have gradually entered the field of vision, but OLEDs have not been able to gain a firm footing, and QLEDs have shouted out. So what's the difference between the screens of these three technologies? Today we'll take a closer look.


LCD


Principle:


LCD is an abbreviation of Liquid Crystal Display, namely a liquid crystal display. Its structure is that a liquid crystal cell is placed in two parallel glass substrates, a TFT (thin film transistor) is disposed on the lower substrate glass, a color filter is disposed on the upper substrate glass, and a TFT is passed through. The signal and voltage on the control to control the direction of rotation of the liquid crystal molecules, so as to achieve control of each pixel of polarized light exit or not to achieve the purpose of display. According to the backlight, LCD can be divided into two kinds of CCFL and LED.


The display principle of the LCD determines that its viewing angle is not ideal. When the backlight passes through the polarizer, the liquid crystal, and the alignment layer, the output light has directionality. Since most of the light is emitted vertically from the screen, when viewing a liquid crystal display from a certain large angle, the original color cannot be seen, and only white or black can be seen. In order to solve this problem, manufacturers have developed IPS technology, which claims to allow the viewing angle of up and down and left and right to reach a greater 170 degrees.


Do you distinguish between LCD, OLED, QLED?


Advanced:


IPS is the abbreviation of In-Plane Switching, translated into plane conversion. This technology is the liquid crystal panel technology introduced by Hitachi in 2001, commonly known as "Super TFT".


The biggest feature of the IPS panel is that its two poles are on the same plane, unlike other liquid crystal mode electrodes, which are arranged on both sides of the upper and lower sides, and thus have a more solid and stable liquid crystal structure. When encountering external pressure, the molecular structure sinks slightly downward, but the overall molecule is also horizontal. The hard-screen liquid crystal molecular structure is far more robust and stable than the soft screen, so it will not produce picture distortion and affect the picture color. , can protect the screen to the greatest extent without damage.


Do you distinguish between LCD, OLED, QLED?


OLED


Principle:


OLEDs are organic light-emitting diodes (Organic Light-Emitting Instruments), also known as organic electro-laser displays, organic light-emitting semiconductors, which use a very thin organic material coating and a glass substrate, do not require a backlight, when the current through, these organic The material will glow. OLED display screens can be made lighter and thinner, have a greater viewing angle, and significantly save power.


Advanced:


AMOLED is an abbreviation of AcTIve Matrix/Organic Light EmitTIng Diode and can be translated as "Active Matrix Organic Light Emitting Diode Panel". Compared with the traditional LCD panel, AMOLED has the characteristics of faster response, higher contrast and wider viewing angle.


Super AMOLED is a technology that Samsung Electronics Co., Ltd. is currently promoting. It is also called “Super Active Matrix Organic Light Emitting Diode” or “Advanced AMOLED Display Technology”. It is mainly used in the use of mobile devices such as smart phones and tablet computers. The main difference with other display technologies is that the touch is actually operated on the panel without passing through the air layer. Compared with AMOLED, Super AMOLED has the advantage of having a brighter screen, reducing solar reflection and reducing power consumption.


Do you distinguish between LCD, OLED, QLED?


QLED


Principle:


QLED is the abbreviation of "Quantum Dots Light EmitTIng Diode Display", which is a quantum dot light emitting diode. Quantum Dots are extremely small semiconductor nanocrystals that are invisible to the naked eye and are particles less than 10 nanometers in size, even smaller than some bacteria. Generally speaking, quantum dots are composed of zinc, cadmium, selenium and sulfur atoms, which are stable and reliable inorganic semiconductor materials.


Do you distinguish between LCD, OLED, QLED?


Quantum dots have a distinctive characteristic: Whenever they are stimulated by light or electricity, the quantum dots emit colored light. The color of the light is determined by the material and size of the quantum dots. This characteristic makes the quantum dots can change the light source. The color of the light emitted.


Moreover, quantum dots can completely convert the blue light emitted by the LED light source into white light, instead of absorbing only a portion like the YAG phosphor. This means that with the same bulb brightness, the quantum dot LED lamp requires less blue light, and naturally less electricity is needed in the electro-optical conversion, and the more efficient performance makes it superior in energy saving and emission reduction.


- Comparison of the advantages and disadvantages of several technologies LCD advantages:


- The technology is mature, the price is low, and it is fully popularized.


- Extremely long life, but LCD backlight life is limited, but the backlight can be replaced.


- The IPS has a rugged, stable screen with no-touch lines, shadows, and flash. It is extremely stable and suitable for touch-enabled TVs and public display devices.


- The ISP can reach a viewing angle of 178 degrees from top to bottom and from side to side, and the color performance at any angle is not compromised.


- IPS manufacturers are common, high-end Sharp, Sony, LG, etc., low-end Tianma, 2k L-screen are basically Sharp's products.


Disadvantages of LCD:


- Requires backlight source, no self-illumination.


- The viewing angle is limited.


Do you distinguish between LCD, OLED, QLED?


OLED advantages:


- The screen is thin, and it is more advantageous to make the ultra-thin machine, and it can be made into a flexible screen, which is not easy to damage relative to the hard screen.


-OLED technology started earlier than QLED technology and has gradually matured under the promotion of LG.


- The color gamut of AMOLED and SUPER AMOLED is very wide, reaching 110% NTSC.


The disadvantages of OLED:


- The production process is complicated. OLED display panels require a deposition process during fabrication, and deposition requires a "shadow mask" device. When the screen size becomes larger, the shadow mask is prone to thermal expansion and contraction, which may make the colors inaccurate. Its solid color also needs to be created with a color filter.


LCD、OLED、QLED你分得清它们吗?


- OLEDs have a relatively short life span and high production costs. The price of OLED TVs in the market is high.


- There are few AMOLED manufacturers. 95% of global AMOLED production is made by Samsung. The remaining share is more than half of LG production.


- The AMOLED has different colors due to the penTIle arrangement.


Do you distinguish between LCD, OLED, QLED?


QLED advantages:


- Under the same picture quality, QLED energy-saving performance is expected to reach twice the OLED screen, and the luminous rate will increase by 30% to 40%. At the same time, OLEDs can achieve the same stability and reliability as inorganic semiconductor materials.


- Have different color rendering in different volumes. By adding a quantum dot material to the backlight, the spectral characteristics of the backlight can be changed and the R/G/B spectrum can be made more pure, so that the three primary colors of the R/G/B screen display can be more pure and more accurate. More colorful colors.


- 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.


- The efficiency of converting electrons into photons is higher. With equal screen brightness, QLEDs consume less natural energy.


Disadvantages of QLED:


- The technology is immature, the products are few, and the price is high. It has not been widely popularized and actually accepted by the public.


Do you distinguish between LCD, OLED, QLED?


LCD、OLED、QLED你分得清它们吗?

Application of several technologies


The application of LCD has been relatively mature, and it has been widely used in televisions, mobile phones, VR head displays, on-board displays, and public display devices. The penetration rate is very high.


OLED is developing rapidly in the field of smart phones. Samsung insists on using AMOLED in the high-end smartphones of the Galaxy series to demonstrate Samsung's features. In the application of virtual reality (VR) devices, AMOLED technology is extremely useful. VR virtual helmets HTCvive and Oculus Rift PlayStation VR uses OLED screens. Since last year, Skyworth, LG, Changhong, Konka, Coolo, and other manufacturers have focused on OLED TVs and lead the high-end TV market. Finally, OLEDs have gradually infiltrated PCs and smart cars. ,


QLED has not yet been applied in large quantities, mainly because high-end TVs will have QLED products.


Do you distinguish between LCD, OLED, QLED?


In general, several technologies have their own advantages and inevitability. QLED is currently the most powerful competitor of OLEDs. In the next few years, we may expect to see even more outstanding QD TVs and mobile products. However, LCDs will obviously not disappear from the market until the cost of OLEDs finally falls to consumers. The future screen display will be more diverse.