lcd screen power consumption brands

Before we get into the details of power consumption, let"s explain how we test for power consumption. We plug the TV into a Kill-A-Watt meter which measures the wattage. We display our checkerboard test pattern in SDR after calibration with local dimming disabled, and we record the power consumption. This is supposed to give an idea of everyday usage, but since everyone"s consumption is different, it"s simply an estimate. As for the max consumption, we set the TV in HDR with the checkerboard pattern, which sets the brightness to the max and enables local dimming, and we record the wattage in this situation.

Now that we have that out of the way, let"s talk about power consumption. Most modern TVs don"t take up much power as technologies such as LED and OLED have brought television power usages down a fair margin. Gone are the days of inefficient CRTs and plasma sets that could run up electricity costs by a good amount or even overheat.

Along with developments in technology that have allowed for more energy-efficient TVs, other new advances need more power, like HDR, which requires TVs to get brighter. Larger TV sizes are also becoming more popular, so they need more power than smaller TVs, even if they use the same technology. However, even then, TVs still don"t require a whole lot of power to function, and they won"t be burning a hole into your wallet when you get your utility bill.

TVs that require more power also get hotter. For most 4k TVs, this isn"t too much of a problem, but we"ve noticed 8k TVs get hot. If you have a TV that gets hot, it"s best to avoid placing it in a hot room and allow for good air ventilation around it. This shouldn"t be much of a problem in the winter because it may actually help heat your room, but you can end up spending more on air conditioning to cool it down in the summer. Then again, most 4k TVs won"t get hot enough to make a big difference in the winter or summer.

As you can see in this chart plotting TVs from 2016 and 2017, there"s a definite link between size and power consumption. Some features, such as full-array local dimming, are more costly, both to build and use. They require more LEDs than standard direct-lit and edge-lit type LCD TVs, but this isn"t represented in the chart. OLEDs have been consistently more power-hungry than the average LED models. In both cases, it"s not a ton of power, especially compared to older plasma TVs that often consumed twice as much as even the hungriest LEDs and OLEDs.

This chart above is a bit old now, so don"t look at the data points, but the trends still apply under our latest Test Bench 1.6 with 2020 and 2021 TVs. Out of our 4k TVs that we"ve tested, the TVs that require the most power in SDR are generally OLEDs. Seven of the ten most power-hungry TVs are OLEDs, and the three LEDs in the top 10 are 65, 75, and 85 inches. Larger TVs still require more power than smaller ones, which is expected. We noticed another trend with the Max Power Consumption: the 4k TVs that require the most power are also some of brightest, which are all LEDs. Even if you get an LED TV, it doesn"t mean it will need less power than OLED if you constantly watch HDR content at its max brightness.

Another trend we notice is that 8k TVs require a lot more power than 4k TVs. This makes sense because 8k TVs have four times the pixels as 4k TVs, so they need more energy to power. When testing 8k TVs at their max consumption power, they often get too hot to touch, which we rarely notice with 4k TVs.

Not only does consumption scale with size, but it also almost perfectly scales with brightness. As you can see above, raising your brightness from minimum progressively leads to higher consumption and inevitably higher costs. Reducing the brightness to the 50% setting instead of max doesn"t exactly halve the energy use, but that"s mostly because other parts of the TV also consume some energy.

Lower the backlight setting. The backlight is by far the biggest drain on your power, and the lower you can get your backlight, the less power your TV will consume. Placing your TV in a dark or dimly lit environment will help you avoid needing a bright backlight.

A lot of TVs have a “Quick Start” feature. This usually means that they stay in standby mode when you press the power button instead of shutting off completely. Turning these features off can help, but some models also allow you to hold the power button on the remote to shut down completely.

Most TVs today feature a light sensor that can adjust the TV"s brightness to the room. Instead of having the TV constantly run at a static brightness, this feature can help reduce consumption by lowering the brightness when it isn"t needed. However, some people may not enjoy this because it constantly changes the brightness.

If you often fall asleep in front of the TV at night, make use of its sleep timer feature. This greatly reduces consumption since you"re not leaving the TV on when you"re not watching it.

Power consumption varies from TV to TV and with the type of content you watch. However, there"s a trend that larger, brighter, and 8k TVs require the most power to function. OLEDs also tend to have slightly higher energy consumption than LEDs, but not if you"re using a bright LED TV and watching HDR content. You can use our power consumption calculator above to give you an estimate of how much you"ll be spending on electricity annually, but it all depends on the type of content you watch.

In terms of overall energy use, the typical home computer setup is a moderate power drain. It might average about 400 kilowatt-hours (kWh) per year, which translates to about $35 in electricity costs and 530 pounds (240 kilograms) of carbon-dioxide emissions [sources: Energy Savers, PlanetGreen]. This is roughly how much a clothes washer uses, 20 times what a DVD player uses and less than a tenth of what a water heater consumes [source: Energy Savers]. It"s a middle-of-the road consumer.

So why all the fuss about energy efficiency in computer monitors? It"s mostly because the monitor accounts for more than 50 percent of a computer"s energy consumption [source: ACEEE]. When it"s in use, it tops the CPU by about 25 percent [source: Energy Savers]. Which brings us to the second reason for monitor-efficiency focus: Even when it"s not in use, which is more often than not, it keeps on drawing power. As long as the monitor is turned on, it"s sucking up a significant number of watts.

That"s perhaps the biggest difference between an energy-sucking monitor and Energy Star-certified, higher-efficiency monitor. An Energy Star monitor draws a lot less power during "sleep" and "off" modes, and the energy-saving sleep mode kicks in automatically after a certain period of inactivity.

One of the easiest ways to cut your monitor"s electricity consumption is to upgrade to an Energy Star monitor. But there are thousands of models to choose from, and they"ve all got energy-saving features. So, how do you pick the best one?

In this article, we"ll look at the five top-rated energy-saving monitors. (Unless otherwise noted, all energy-consumption values in this article have been determined by Energy Star. Manufacturer energy statistics may vary depending on whether they use typical, average or maximum number of watts.)

A home without a TV set is more the exception than the rule in the U.S. Many households even have a couple or more. Well, watching TV is one way to relieve stress and boredom, so we can’t blame you if you have a TV in every room. But if you aim to lower your energy consumption, it will be a good idea to find out how many watts a TV use. In that way, you can limit your TV viewing to see a reduction in your electric bill.

How much electricity a TV set uses depends on several factors, such as your TV’s size, age, and the like. In general, a television’s power consumption falls between 80 and 400 watts. So if electricity costs $0.13 per kWh in your area and you leave your set on 5 hours a day, expect your viewing to add around $7.13 a month to your energy expenses.

However, as we said, how much electricity a TV consumes varies. A 24-inch 2080p model will use far less power than a 75-inch 4K QLED one. So if you want to save electricity, knowing the factors that affect your TV’s energy consumption will help with your goal.

Cathode-ray tube (CRT) models: These types were the only models you could find for the longest time. Their energy consumption is around 60 to 100 watts per hour. ACRT TVconsumes about 2-3 watts an hour in standby mode.

LCD models: The size of the panel determines how much power an LCD TV consumes. The median model has a 32-inch panel size, with an electricity consumption ranging between 40 and 55 watts. In sleep mode, this type uses up a minuscule 1W per hour.

LED TVs: Being more energy-efficient, the power consumption of LED TVs is 40% lower on average than other models. Compared to LCD TVs of the same size, one with an LED panel uses up around 50 watts per hour powered up and only 0.3 watts in sleep mode.

Plasma TVs: These models aren’t as energy-efficient as LCD or LED types. The average electricity consumption of a 30-inch TV is around 150 watts per hour. In sleep mode, the plasma TV consumes about 0.5 watts.

You’ll need three essential pieces of information if you want to calculate your TV’s power consumption. These include your unit’s wattage, hours of TV use, and the electricity rate in your area. Use the following formulas to find out how much you pay for your TV viewing.

TV models in the market have wattages between 80 to 400 watts. So let’s say you have a 50-inch LED TV with a rated power of 100 watts, and you use it for 12 hours a day.

Before the invention of the different models, only the size of a cathode-ray tube TV determined how much energy the unit consumed. Advances in technology created various models, some of which are more power-efficient than others. Nowadays, how many watts a TV consumes depends on several factors aside from its size. So if you want to know how many watts a TV use, you’ll need to look at the model.

The older your TV set, the higher its electricity consumption. For example, the energy usage of a 32-inch CRT model stands at 150 watts, on average. Compare that with a newer LED TV of the same size, which is between 40-55 watts and a maximum of 70 watts per hour.

Aside from the reduced power consumption of newer models, upgrades in technology also led to better picture quality. So it’s not just a matter of how many watts your unit consumes but also the viewing pleasure it brings.

The second most significant factor determining how many watts a TV consumes is its size. For example, a LED model 15-inch TV needs only around 15 watts to operate. In contrast, one with a 50-inch panel uses 50 watts an hour. This proves that the size of your TV affects how much power your home draws from the grid. In fact, each upgrade in size will increase the watts your set uses due to the resolution enhancement of the unit.

The display technology used in your TV will affect its power usage and hence, your electricity bill. An LCD and LED TV are comparable when it comes to energy efficiency. Older CRT and plasma screens are substantial energy drains compared to newer screen types. CRT and plasma TVs use around three times more electricity than their LCD and LED counterparts. If you have a TV set using the older technologies, switching to an LCD or LED set can help lower your electricity bill.

Knowing some important terms will allow you to calculate your appliance’s power usage correctly. This will significantly aid your efforts to lower your home’s total energy consumption. These essential terms are the following:

All TV sets have corresponding wattages, which vary depending on the factors we’ve mentioned. If you want to know the wattage of your flat-screen TV, for example, look at the back of your appliance. You’ll usually find a small silver sticker detailing the technical specifications of your unit. These specifications include the wattage, input voltage, and the like.

Undoubtedly, a CRT TV drains more electricity than its LED counterpart. Screen size notwithstanding, the older technology is less energy-efficient, making the old tube a power hog.

A CRT set can use up a whopping 400 watts depending on the screen size and other factors. Plasma screens come second in terms of energy usage at about 150 watts, followed by LCDs which suck up 165 watts of power. LED TVs are the most energy-efficient, as they use up only 155 watts.

Although TV sets aren’t the top energy users in a home, they still consume electricity, and this power consumption can significantly add to your total electricity usage. Thus, they can potentially increase your monthly electric bill. However, you won’t have to give up one of your sources of entertainment to see some savings on your utility expenses. Reducing the amount of power your set draws is the key to your goal.

The backlight drains the most power among your television’s components. Lowering the backlight level will also reduce your set’s energy consumption. Installing your device in a dimly lit environment will lessen your need for a bright backlight. Modern units usually come with a built-in light sensor. Turn it on to automatically optimize your set’s brightness setting.

Turning off your TV set is the best way to reduce its power consumption. Better yet, pull the plug off the socket. The energy consumed by even a 100-inch TV falls to zero if it’s disconnected from a power source. This may seem like a no-brainer, but many people leave their sets on all the time. They may use it for some background noise or don’t even notice it running. Make a conscious effort to power down your set to see some savings on your electricity bill.

You likely have several components connected to your TV. Examples of these are your home entertainment system and gaming consoles. These devices may remain on standby mode without your knowledge, making them continually use electricity. Like with your television, make sure you completely turn off all the accessories attached to it. Using a smart power stripmakes it easier to cut off the power for these devices.

Just because an appliance isn’t powered on doesn’t mean it’s not drawing energy from the grid. Electronics usually have a standby mode setting. In such a state, they continue to consume electricity. Standby power will use about 2.5% to 5% of electricity. The amount may be small but it can add up, especially if you leave all your appliances in this mode. So turn off your set completely when it’s not in use. For greater convenience, you can plug your TV into a smart power strip which turns off devices that are not in use.

The “always-on” feature on your set lets you enjoy viewing ease older generations never dreamed of. Imagine being able to turn on your TV by voice command to a smart speaker. The downside? This feature adds to the set’s electricity usage. You can lower your appliance’s energy consumption by almost 50% by turning off this feature, especially if it’s an Energy Star model.

The best location for your TV depends on your viewing habits. In general, install it in a lighted room to save on the screen brightness. However, if you prefer a theater-like ambiance, place the set in a dimly lit room and adjust the contrast, setting the brightness control to low.

Electronics that remain plugged in continue using electricity even when they’re not running. There’s even a term for the power consumed by electronics that draw electricity. It’s called vampire energy. To prevent wasting electricity, pull the plug off the socket. Alternatively, you can use a smart power strip. You can save around 5 watts by using this technique.

A smart TV is an excellent investment when it comes to reducing your power bills. It has many features that can help lower its power use. Better yet, get an Energy Star-certified model. Appliances with this seal indicate that they consume less electricity (by about 30%) than conventional models. They may cost more upfront, but you can get back your investment through the savings on your utility expenses.

Next to the old CRT models, plasma TVs consume the most electricity among the newer screen types. Their picture quality may be terrific, but eco-friendly, they’re not as they need more power to operate. The higher energy usage may not be enough to show a dramatic spike in your electricity bill, but the small amount adds up. OLED and LED TVs are better alternatives.

Many TV brands and models now come with the energy-saving mode. The feature may be called by different names, such as eco-mode, or it may be part of an Ambient Light Detection selection. But it serves the same purpose, which is to save electricity consumption. Find out if your set is equipped with this feature and use it as much as possible. Not only will yousave money on your bill, but you’ll also reduce your home’s carbon footprint.

Although other factors come into play that can affect the TV’s power consumption, size is a major consideration. That’s because it takes more electricity to power a large screen than a small one. For example, a 30-inch LED TV uses between 50 and 60 watts, while a 42-inch one consumes between 80 and 100 watts.

Appliances that have a standby mode consume electricity even when turned off. This energy use is called vampire power. Computers and equipment related to computer use (i.e., modems, routers, etc.) rank first in the list of appliances that use vampire energy. Instant-on TVs come next.

The answer to how many watts a TV consumes depends on a few factors, such as screen size, type, model, and set’s age. Even your TV use affects your unit’s energy usage. Plenty of screen time significantly drives up your monthly electricity bill. If you aim to shrink your monthly electricity bill, there are some measures you can employ. These include buying a smart TV, lessening your TV use, and following our tips for reducing your appliance’s power usage. Some homeowners even opt to power their sets using solar panels.

In the end, it’s not just about saving money on your energy costs but also about helping the environment. By lowering your home’s electricity consumption, you join the efforts to lessen the greenhouse gas emissions that warm the planet and accelerate global warming.

For small/medium size televisions, LCD is clearly the choice for those of you with limited power. The other great news is that they are getting cheaper as time goes on. Coles and a number of supermarkets are now selling 38 cm LCD televisions for under AUS$200.

I say "if" because they are designed to run off a 230V-12V regulated power supply. This is not the same as running it direct from a 12V solar system where the battery voltage can easily range from 11 to 15 volts. An even wider variance is possible with flat or failing batteries; a battery system being equalised to 15.5-16 volts etc.

There appears to be a few brands that can definitely be run off a battery and these are marketed to the caravan and yachting market. Majestic LCD televisions will operate between 10.9 and 15.5 volts. Xien sell a range for the marine industry. Sharp televisions are also sold as "12 volts" but come with a $140 special 12 V lead. I suggest this has a power conditioner on it. Dick Smith once sold (and may still do so) an AC/DC 15 inch model.

The power "saving" of being able to run it direct is significant. From my observations, the 230 to 12V adapter supplied with the television is only about 50% efficient. By the time you then use an inverter to change your 12V to 230V, I estimate that you could be tripling your power consumption.

For the "big end of town", a consumer magazine tested 4 popular brands of large LCD and Plasma televisions for power consumption. Interestingly, the 45/ 46 inch Plasma televisions used 260 –286 watts while the 42/43 inch Plasma televisions used significantly less (183- 186 watts). All four used between 0.67 and 1.4 watts on stand by.

Today, people use TVs to stream the latest shows and movies in excellent picture quality. But televisions are doing more than providing entertainment value. Your television draws power every second it"s on, which means you should consider your TV power consumption every time you pay your electric bill. How much power does a TV use? Continue reading to learn how much electricity a TV uses across the different types of television sets available.

With these variables in mind, you can better determine how much energy a TV uses over a set period. First, you should learn more about the different types of televisions and how much power they draw. Please remember that the following wattages listed are generalized since every TV is different. Use the following information to get closer to understanding your TV"s power consumption.

LED stands for "light-emitting diode." LED TVs use this technology to provide excellent picture quality with low power consumption. Today, most consumers use LED TVs to watch movies, tune in to their favorite shows and play the latest video games. Most LED screens range from around 30 to 60 inches, but recently, people have started buying larger LED TVs reaching upward of 85 inches. LED technology allows for these massive screen sizes, thanks to their inexpensive design and efficient energy performance.

A 32-inch LED TV will consume around 50 watts of electricity. On the other end of the size spectrum, you can expect a 50-inch or larger LED TV to consume 100 watts at the most, with many modern LED TVs using much less energy. Compared to plasma, LCD and OLED TVs of similar sizes, you"ll find LED TVs are significantly more efficient, which makes them a popular product.

LCD screens use tiny lights called pixels that manipulate the colors of green, blue and red to create moving images. These pixels get the electrical power needed to emit light using liquid crystals, which is where the term LCD comes from. LCD TVs grew in popularity during the late "90s and early 2000s because the technology allowed the TVs to be slimmer, letting people mount their televisions on walls for the first time.

Besides these advantages, LCD TVs also provided consumers with a more energy-efficient television option over the outdated cathode-ray tube variety. However, they are slightly less energy-efficient than LED TVs of similar sizes. A 30-inch LCD TV uses about 60 watts of electricity. Larger LCDs like a 50-inch model will use around 150 watts.

Plasma TVs use a different type of technology than LEDs and LCDs. Plasma is an electricity-conductive gas. As the plasma receives energy, the particles begin moving and colliding which causes the release of light photons. This technology allows plasma TVs to have a slim form factor like LEDs, but plasmas differ considerably from LED TVs in their wattage used.

Plasma TVs produce incredible images with deep blacks and crisp color contrast, but they use a lot of energy in the process. In 2009, the California Energy Commission banned the sale of TVs that do not meet efficiency standards when powered on and displaying a picture. To put this information into perspective, a 42-inch plasma TV can consume nearly 500 watts of electricity. This level of energy use puts plasma TVs in a similar realm of power consumption as that of many household refrigerators.

OLED stands for "organic light-emitting diode" and is one of the latest progressions in television technology. Many viewers agree that OLED TVs provide the best picture quality available, but they do this at the expense of slightly increased power consumption over their LED predecessors.

For perspective, a 65-inch OLED TV will consume nearly 120 watts of electricity compared to a 65-inch LED, which will use close to 90 watts. It may seem like a minuscule difference at first, but this increase in energy consumption will add up over your TV"s lifetime.

Using an energy-efficient TV can help lower your monthly energy bills and reduce your carbon footprint. Often, modern TV packaging will display how much energy the TV uses in a year under a specific set of parameters. If you want to be even more energy-conscious, you can buy Energy Star-certified TVs that can help keep your TV power consumption low while still giving you excellent picture quality.

The Sceptre E185BV-S LED TV is the option for you when you want to save as much as possible on your energy bill. With its low weight and portable design, you can easily move it around your house for use in the living room, bedroom or guest room. Plus, its size makes it a viable option as a desktop computer monitor, so you can use it for work and leisure. Here are some of the specs.Screen size: 18 inches

For a TV that doesn"t sacrifice image quality for excellent energy efficiency, choose the VIZIO D40-D1. It has a refresh rate of 60 Hz with 1080p resolution, so you know you"re getting outstanding picture quality without cranking up the energy usage. Here are some things to note about the VIZIO D40-D1.Screen size: Ranges from 24 to 50 inches

If you"re an informed consumer who cares about your energy consumption and monthly bills, you may be searching for ways to reduce your carbon footprint. At EnergyBot, we can help lower your energy bill by pairing you with the lowest-cost energy provider in your area. Getting started with our process is easy, and the results could keep more in your pocket every month.

For those interested in knowing about what electric device costs in your electric bill, this surely will be of useThere are a few negatives in the user document is not written well and could use more content on how to use and better lying out the images to content.The big flaw to me is there is no backlight and in most cases you"re plugging a device into an electric outlet that is only 1 foot from the ground. Because of this depending on lighting you cannot see what is on the small screen and pushing the buttons is not easy bending over almost to the groundFor some reason even though I tested this monitor with 5 different devices that unit would always report the day cost at zero but the other costs even for up to a year showed money valuesThis monitor of course would not be able to compute in total what your home is really using in electricity, but its real use is to see what anything plugged into 1 electric is using and showing important information such as amperage, wattage and costs of electric useExample is I have a small and a larger dehumidifier.As I collected data from the monitor I plugged that data into an Excel spreadsheet and as shown in my screen prints that the larger unit used over double what the smaller unit did but in fact the larger unit did not do any better in reducing humidityThis allowed me to also then see what the total cost to me in electric bills and clear by using this monitor to no longer use the larger unitYou really need to test a device in this electric monitor for some hours to get the unit to do a better overall averages of all values it reports.Also, one other issue is after using the unit and then move it to another electric outlet to test another device is before plugging in the device after the unit is plugged into an outlet is you have to push and hold a very small rest button, like with end of a ballpoint pen and be sure proper clearing of past monitor tests have been cleared, or the newest device plugged in the values will not be correctThey need to better the design by adding a backlight and making the screen larger and maybe tilt the screen angle upward so easier to see when you"re standing up

New LCD flat panel displays are constantly reaching record lows in power consumption: 50 W, 40 W, and even 30 W are sometimes achieved in displays as large as 24” these days. The most important variable in display power savings is the backlight technology. Today, we have fluorescent lighting transitioning to light-emitting diodes (LEDs). We grabbed all of our test lab"s LCD monitors and two old CRTs, pitting them against each other in a power consumption shootout.

As of late, we"ve written a lot about power consumption on the system side, where usage is most noticeable. Processors and graphics cards were particularly blatant consumers a few years ago. Nowadays, the trend (especially in Europe) is mostly toward more environmentally-friendly components.

Green computing has forced even the largest corporations to rethink and refocus. We have low-power processors, motherboards, memory modules, hard drives, and even high-efficiency power supplies. Many things have changed, but you still need to look at every product individually to decide whether or not it’s truly efficient.

Interestingly, displays were largely neglected in this "green refresh." Part of the reason was that, ever since LCDs displaced CRT displays, the typical PC utilizes more power than its attached monitor. However, this is changing rapidly. Enthusiast PCs, gaming systems, and workstations still often consume more than 100 W at idle and much more under load. But the majority of PCs sold are business and mainstream systems, and the average power consumption in this group is dropping fast thanks to aggressive optimization.

As a result, mainstream PCs that don’t sport discrete graphics and multi-core processors consume reasonable amounts of power. In the article Build a 25 W Performance PC Using Core i5, we proved that a system with above-average performance does not have to draw more than 25 W at idle. Since most 20" or higher flat panels consume 30 or 40 W, it"s likely that your display will chew up more power than your nettop or mainstream system.

1. * With electricity expense calculating, you can monitor which appliance cost the highest energy and how much your standby appliances cost. In this way, you can determine how to low your power consumption.

With the increasing usage of digital screens, energy consumption has become a pressing issue for electronic display users worldwide. Thus, the energy efficiency of display screens becomes a crucial subject of making the lower power consumption energy-saving display design.

The term liquid crystal describes a substance that lies in a state between liquid and solid but exhibits the properties of both. Since their first observation in the 19th century, LCD technology has been enjoying various advancements, and currently, it accounts for an enormous share in the entire display market area.

LCD belongs to a non-emissive display category, and further, you can classify them as Passive matrix (PMLCD) and active matrix (AMLCD). The fundamental difference that exists between these two categories is in the way of addressing pixels for producing different luminance components of an image.

The power consumption of LCD is directly proportional to the drive frequency (as the frame rate lowers, the power consumption reduces) and the displayed image.

Electronic paper is a vigorous display technology that can rip off the traditional paper. Just as in the case of LCD, e-paper also belongs to the non-emissive display category, and here we do not need any backlight. It is because the ambient light from nature is enough.

Significant characteristics of e-paper include flexibility, reliability, multi-functionality, and ultra-low power consumption. They even lead to zero consumption in the non-updating period. You can find several technologies in small sizes, although there are approaches with A5 size.

Several OLEDs share specific characteristics like high brightness and contrast, captivating color definition, and quick response time. Because of the self-luminous effect, they offer an enormous view angle of 160 degrees. However, a significant benefit is their low power consumption (proportional to the number of pixels that are turned on, the black dots will not require power), which depends on the present content only because they don’t need a backlight.

It makes them thinner and efficient. As they are manufactured on a small scale, they are available at a high price. Several studies conclude that while using this technology, the consumption of displays rises strongly as per the size.

Electroluminescent display technology is well-known for taking advantage of the light-emission phenomenon because of the strong electric field. You can find a solid-state thin phosphor film and insulator stack deposited on a glass substrate in the ELD driven by high voltage electronics generating a positive and negative pulse. Plus, they are known for being a cost-efficient light source method leading to low power consumption.

Electroluminescent technology is well-known for having lower consumption and contrast ratios. It is best to pay attention to the viewing angle values of 180 degrees.

When looking at several options within the reflective display, you can find two significant candidates: E-ink display and  LCD. As they all carry different characteristics, you should look at the specific application to understand the power-efficient one.

Reflective LCD displays, such as 7 segment displays, have been around for a long time. We recognize them from all kinds of household appliances including thermometers, ovens, watches, toys and medical devices. Until recently, LCD has been the only option for low power but now two alternative technologies exist on the market; the E-Paper display based on electrophoresis and the Ynvisible Display based on electrochromism, both offering features that LCD is lacking.

In this article, we investigate Electrophoretic displays (E-Paper), Reflective LCDs and the Ynvisible Segment Display from a power perspective. All these technologies are categorized as reflective displays. Reflective displays are essentially required for ultra low power applications since emitting light is very power consuming. We want to clarify that displays from different manufacturers have slightly different energy consumption, and the data presented here is an average from the suppliers with the most energy efficient displays.

Before we go too deep it is important to understand the driving requirements of each display technology. Reflective LCD displays need an active driver that varies the polarity of the voltage across the pixel in a frequency of about 60Hz. E Paper, on the other hand, doesn"t need any active control once the display has been updated, this feature is often referred to as bistability. Ynvisible Displays is somewhere in between LCD and E-Paper; once the display has been switched the controller can go idle for about 15 minutes (there exist versions that can be idle for up to 24 hours as well). We usually call this phenomenon "semi-bistability". After this time a small refresh pulse is required to maintain the state. For E-Paper and Ynvisible Displays, energy is only required during switching and updating while no energy is consumed during idle state. Typically, the energy required for a full switch on an E-Paper display is about 7 to 8mJ/cm2. The corresponding number for the Ynvisible Segment Display is about 1mJ/cm2 with the addition of 0,25mJ/cm2 every 15-60 minutes. LCD continuously consumes about 6µW/cm2.The energy consumption depends on how often the content is changed.

Followed by the different driving characteristics of the displays, we need to look into how often the display is updated to truly understand which display is the most energy efficient for your specific application. This is done by calculating the average power as a function of the number of switches per day. As seen in the diagram the E-Paper display is the most power effective choice if the application is switching less than four times a day. Between 4 and 600 switches, the Ynvisible Display is the most energy efficient choice. If the display switches more than 600 times a day reflective LCD would be the best option from a power perspective.

To summarize the findings we can conclude that the Ynvisible Segment Display is the most power efficient choice if you need a display that is supposed to switch 4-600 times a day. However, we need to remember that there might be other features to take into consideration as well. For example, the Ynvisible Segment Display is flexible in its standard format and can be offered in multiple different colors without additional cost.