Smart Windows

Smart Window is  a window whose light transmission properties are altered when voltage is applied.

It can replace the blinds or curtains indoor and the tinting film in vehicle.


It tracks the sun's altitude & location and shields sunlight. There are two main benefits. 

  • Good visibility and efficient sunlight shading
     It almost completely blocks the sunlight but the ambient light is very slightly shaded. So, it does not disturb customer’s sight.

  • Extremely low power consumption (<0.1W/㎡)
     It is because the driving voltage is as low as 5V or less and the specific transmittance preferred in the primary use environment is given in voltage off-state.


   Good visibility and efficient sunlight shading

It almost completely blocks the direct sunlight but the ambient light is very slightly shaded. So, it does not disturb customer’s sight. Also desired shading can be provided to any passengers of the vehicle while driving. For example, in case tinting on a off-state is 15% blocking of the sun light, you can change the tinting range of each window from 0.1% to 35% by applying power according to the outside light conditions, that means each window, i.e. windshields, side windows and back windshields can be individually controllable with intermediate degree of darkening. Therefore everyone in the vehicle could be free from glaring during the day.

    Low power consumption and Eco friendly

 It is because the driving voltage is as low as 5V or less. Furthermore the specific transmittance preferred in the primary use environment is given in voltage off-state. Blocking or filtering of the Sun's rays reduces the amount of solar energy being transmitted through the vehicle windows significantly minimizes the need to cool the vehicle, thus reducing A/C cooling that means increasing fuel efficiency or saving gas prices, especially in summer. A reduction in overall solar heat gain means reducing your carbon footprint. Across many climate zones, blocking the Sun's rays has been shown to be one of the most cost-effective energy saving solutions.

    Selection of off-state transmittance and desired shading while driving

 Off-state(power off) transmittance to be a specific value between the highest and lowest, used for most of the time spent at wheel could be selected by users. Users can increase or decrease transmittance as they want while driving depending on the brightness of the circumstances by applying voltage which consumes little power. For example, if you apply voltage ranging from 0V to 5V, transmittance can be lowered to 0.1% or less or highered to 35%. Applying different voltages to smart window devices makes maximum shade or minimum shade possible for every window of a vehicle, including sunroof according to their surroundings.


Car Window

  Drivers are sometimes blinded by the Sun. Tracing Sun's location and its altitude combined with NDIS's variable tinted window technology makes it possible to reduce significantly direct sunlight reaching to driver's or passengers' eyes through the windows. Especially when the Sun is low on the horizon such as after dawn or before dusk, direct sunlight can shine through the windshield at a location below the reach of the sun visors and shine in the driver's and front passenger's eyes, making their eyes blind momentarily and so creates dangerous driving conditions.

Car Sunroof

  NDIS's SOLTRACER makes the car with lower mileage more than conventional panoramic sunroof. Because smart window is  made with films, so it is lighter than conventional panoramic sunroof made with glass. Panoramic sunroofs are widely used nowadays because of nice looking black roof, open feel, leisurely driving and allowing heat to escape quicker in summer. It also causes a problem like hot interior’s temperature. Typically a glass roof lets more sun into the vehicle causing the internal temperature of the vehicle higher. This could mean that the air conditioning may have to work harder to bring the internal temperature down. But there's no worry with NDIS's SOLTRACER.  It can protect 99.9% of direct visible sunlight passing through the sunroof in broad daylight thus reducing A/C cooling that means saving gas prices.

Indoor Window

  It can replace the blinds, curtains and window dressings indoor, which require upkeep and can collect dust and germs.

Transparent display combined with smart window

 Smart windows displaying drawings or text messages can be a transparent display. NDIS will soon release some smart window samples that show drawings and messages using smart window film.


Future Company Focus "NDIS Corp."

Oct. 22, 2018/ etnews

  NDIS (CEO Kwon Soon-bum) commercializes smart windows, which have more sunlight blocking effect than existing smart windows for automobiles. NDIS will be in charge of technology development of the product, and a domestic listed company will handles production and sales.

 Established in 2004, NDIS was founded by a team of professors from Hoseo University. It is a subsidiary of DMS, a display equipment company. After its establishment, it developed such special displays modules like glasses-free 3D displays and flexible displays.

Smart window with the brand name "Soltracer" developed by NDIS features the ability to sense SUN's location automatically and then to shield direct sunlight as much as possible while maintaining ambient light, which means improving visibility. Smart windows usually do not properly block the glare caused by sunlight, or the whole view darkens. "Soltracer" solves these shortcomings and manufacturing cost is as low as one third compared to competing technologies such as Polarized Particle Dispersion (SPD).

The "Soltracer" is a plastic liquid crystal display(LCD) using a roll-to-roll (R2R) process. In contrast to driving a display based on a thin film transistor(TFT), this device controls the brightness by adjusting the voltage without a TFT. 

 NDIS will focus on developing technologies and related products to mass produce displays using roll-to-roll process technology. Starting with the mass production of "Soltracer", NDIS plans to develop products for various niche markets such as color electronic paper.

 Kwon Soon-bum, CEO of NDIS said, "Although TFT-based displays have been able to produced by only large companies, small and medium-sized companies can also target new display niche markets if they have a roll-to-roll based technology. The domestic display industry is expected to create new markets and small and medium-sized companies are also expected to be a new starting point for producing displays".

Evolved LCD ... VR · From hologram to smart window

August 30, 2018 / Digital Daily

  LCD (liquid crystal display) is evolving. Beyond the liquid crystal display (LCD) used in smart phones and TVs, application areas are expanding to include virtual reality (VR), holograms, and smart windows for sunlight blocking. NDIS, founded by  Hoseo University professor Kwon, Sun-Bum, exhibited a Smart Window brand named "Soltracer" at the 18th International Information Display Conference (IMID 2018), which opened in BEXCO, Busan on August 29, 2018. 

  Liquid Crystal is a material that plays a key role in LCD. In the intermediate state between solid and liquid, the arrangement is changed according to the voltage to block or pass the light. The most basic principle of LCD TVs is the 130th anniversary of its founding this year, and it was the 50th anniversary that was made with LCD panels. This is a long and proven technology. 

  The NDIS SolTracer is a kind of intelligent tinting. It protects the eyes of the driver by blocking light coming in from outside (mainly sunlight). If you lower the voltage, the window becomes less darker, and if the voltage is higher, the window will be darker. Compared to suspended particle devices (SPD), which are dependent on imports, the price of SolTracer is one-third of SPD and the response time of LC is much faster than that of SPD. Kwon said, "If the price of SPD is 300-400USD per square meter, SOLTRACER price is 100USD only. For electricity usage, the SPD requires 3.5 watts(W), while SOLTRACER only uses 0.5W. " Currently, the mass production equipment design has been completed by the roll-to-roll (R2R) method.

Challenges to the global display market ... IMID strikes a small business

August 30, 2018 / etnews

  This year, the 2nd International Exhibition on Information Display (IMID), which provided the exhibition booth, attracted a lot of domestic SMEs who challenged to enter the market. As a combination of professional academic conferences and exhibitions, a variety of products have emerged, ranging from R & D equipment to commercial products. It is a desire to find business opportunities in the domestic and overseas markets, starting with IMID exhibition. At the IMID 2018 exhibition held in BEXCO, Busan from 29th to 31st of 2018, a number of high-tech products of domestic SMEs appeared. Founded by Hoseo University professor Kwon Soon-bum and a team of researchers, NDIS has developed a smart window 'Sol Tracer' that is more effective in blocking sunlight than conventional smart windows for automobiles. This product automatically detects the solar altitude and location by adjusting the voltage to intensively block the sunlight.
  The existing Smart Windows have a disadvantage. For example to shade the sunlight, the whole field of view darkens and the glare caused by the sunlight can not be blocked properly. The NDIS Smart Window keeps the ambient light intact, sensing the location of sunlight with high visibility, and is highly effective in shielding. Kwon, Soon-bum, CEO, said, "The cost is lower by one-third than the competing technology, Suspended Particle Devices(SPD), and the power consumption is as low as one-fiftieth."

NDIS succeeds in developing film type LCD

July 23, 2012 / etnews

  A Korean venture company has developed the world's first film-type LCD that can overcome the flexible LCD limit in which the image is distorted when pressed or bended . It is noteworthy to be able to realize a glasses free 3D display (3D display) which is reduced in thickness by half using plastic substrates. NDIS announced today that it has developed the film type LCD 'F-LC' which has the same electro-optic characteristics as the conventional glass substrate type LCD. Polymer walls located between the liquid crystals stabilize the LCD cell in the column, so there is no image distortion even if bent. The polymer wall was installed in the black matrix part between the LCD pixels to eliminate the aperture ratio damage. This allows the electro-optical properties to remain the same as for conventional LCDs. The polymer wall was made by mixing the liquid crystal and the monomer, coating them, and then irradiating ultraviolet rays to transform the monomer into a polymer. In this way, the TN, IPS and VA mode LCDs can also be realized on plastic substrates. F-LC developed by NDIS can reproduce the LCD on a flexible display without any impact stability problem. In addition, due to its lightweight, unbreakable nature, it will be used in a variety of applications. NDIS has also developed a parallax barrier-type autostereoscopic 3D display module that uses F-LC to cut the thickness by half compared to glass substrate LCD (0.7mm). Futhermore the weight of the plastic substrate can be reduced to one tenth. Parallax barrier is a technology that displays images of left and right eyes only in each eye using a barrier, and is mainly used in a glasses-free 3D display. By using the display module of NDIS, the thickness and weight of the glasses-free 3D display module of a mobile device such as a smart phone and a game machine can be greatly reduced. NDIS is a research-oriented venture company that was founded in 2004 by Professor Kwon Soon-beom of Hoseo University and develops the next generation display. Kwon said, "F-LC is a film-type application field is unlimited," he said. "We will secure the cost competitiveness by early establishment of roll-to-roll production line and will pioneer the next generation market including film LCD for glasses-free 3D display."

NDIS Corporation's Display Global New Technology

October 8, 2010 / Herald economic nespaper

  NDIS (CEO: Soon Beom) is a company established in Hoseo Incubator Center in 2004 by CEO Soon Beom Kwon, a professor of Hoseo University's Department of Display Engineering, and has been focusing on 3D display and flexible display, leading the next generation display market by developing differentiated new technology. Recently, the company acquired a new technology (NET) certification of flexible display manufacturing method, which is a liquid crystal encapsulated flexible display technology capable of separating RGB color by pixel by using one liquid crystal on one flexible substrate without color filter. It has excellent shock resistance without deformation against bending and pressing because it encapsulates liquid crystal molecules and roll-to-roll method can be produced by forming liquid crystal layer by coating method process. In addition, it is evaluated that it can expect large-scale import substitution and export effect because it has excellent color characteristics and easy coloring in comparison with foreign competitors prevailing in the current market. Flexible display technology is a technology that even large companies can not easily challenge. As a small and medium venture company, we have been attracting much attention because of its success in technology development. CEO Soon-Bum Kwon said, "We challenged ourselves to try to win the world by technology, In the case of 3D stereoscopic images, we have developed the 3D technology of wide viewing angle without glasses, Ghost Free Parallax Barrier LCD design technology and the technology of precise adhesion of TFT and barrier to develop the core Technology and has been leading the market with the production of 3D LCD module production equipments for the first time in Korea at the end of 2008. Kwon Soon-bum, CEO, said, "We will prioritize the market through the commercialization of next-generation display (3D, flexible) technology as our top priority, and in the long term we will leap forward as a top-tier company through upgrading and globalization of our core businesses."


  According to market research on Smart Glass Market by Technology, Application and Geography - Global Forecast to 2023, dated Sep.1, 2017, Smart glass market is expected to grow at a CAGR of 16.61% between 2017 and 2023 and Transportation and architecture applications are expected to hold significant share of the smart glass market by 2023”

  The smart glass market is expected to reach USD 8.35 billion by 2023 from USD 3.32 billion by 2017, at a CAGR of 16.61% between 2017 and 2023. The growth of this market is mainly driven by factors such as growing demand for smart glass in automobile applications, strong government support through mandates and legislations for energy-efficient construction, and optimal energy saving through smart glass applications.

  Smart glass is ideal for automobile, aviation, and other transportation applications requiring heat and glare control. In the automotive sector, smart glass is used in applications such as rearview mirrors, windows, sunroofs, and windshields. Smart glass provides protection from harmful ultraviolet (UV) rays, reduces glare, helps control heat inside the vehicle, and minimizes the energy consumed over temperature maintenance.

  The transportation and architecture are the leading applications, together accounting for more than 90% share in the smart glass market. Various benefits provided by the smart glass has led to the increased adoption of the units of this glass in the applications such as architecture, transportation, power generation plants (solar), and consumer electronics and others. Smart glass is also used in museum artwork expositions and sunglasses.