Smartphones have displays and this is where all the action takes place. If you want to call someone, tap the screen. You want to order food, tap on the screen to open the app and complete it. The same thing works for driving a cab. You also use it to watch videos or movies on the go. The screen is the hub where most of your computing work takes place, but how much do we know about its various aspects, its nature and quality. We have decided to jot down these features, technology for our readers, giving them an in-depth look at basics like PPI, refresh rate, and AMOLED panels.
What is PPI?
We start our interpreter with pixels per inch or as most of us call it, ppi. You may have heard various definitions for PPI, but in simple words, it is used to measure the proximity of pixels on a mobile screen. It’s also worth noting that if you sometimes get a microscopic view of the screen each pixel is seen as a square. So, for example, if a smart FoneThe display offers 300 ppi, which means there are 300 dots per inch, making images and content appear crisp and sharp to viewers.
what is touch sampling rate
Next we are going to talk about the touch sampling rate which is available on most of the smartphones sold in the market these days. As the name suggests, touch sampling rate refers to the number of times the screen can register your touch input in a second. It is measured in hertz (Hz) on the specification sheet.
Therefore, each time you touch the screen, and the time taken by the display to render the next frame, you call the touch sampling rate. And like most cases, the higher the touch sampling rate, the better the display provides for a better user experience. These days you have phones with 180 Hz or 240 Hz touch sampling rates, which means the display will seek touch input every 180 or 240 seconds, resulting in faster processing on the hardware front.
what is screen refresh rate
Another widely popular term these days is screen refresh rate. And no, it is not the same as touch sampling rate as many believe. The word itself explains the technology behind it. Screen refresh rate refers to the number of times the screen is refreshed every second. This can happen either when you scroll through apps or open an image/view on the display. Again, the higher the refresh rate, the better the screen will respond to any task. The high refresh rate of the screen is beneficial in many ways. Mostly because they skip a frame, which is ideal for gamers, and even regular navigation on the phone becomes smooth, or fluid as some brands say.
What are the types of display panels?
There are four types of display panels that are recognized and used by smartphone manufacturers right now. these:
TFT Panel
Thin film transistor panels are how we started using smartphones. This technology delivers good image quality and supports high screen resolutions. But the biggest problem with TFT panels is the low visibility in direct sunlight, which has prompted brands to look at other options.
ips display
The next one is called In-Place Switching Panel, which is basically an upgraded version of TFT and focuses on low power consumption which automatically improves the battery life of the phone. These are expensive as compared to TFT panels, which is why you get them on phones priced above Rs 10,000 in the market. With IPS panel you get good wide viewing angles.
AMOLED screen
Everyone is familiar with the Active-Matrix Organic Light-Emitting Diode or AMOLED panels that are available on mid-range and high-end smartphones these days. This panel is renowned for its top-notch color reproduction, and allows phone makers to design lightweight devices. The high brightness level doesn’t compromise on battery life, which is important.
Super AMOLED Screen
This version of AMOLED comes from samsung, The most interesting thing about Super AMOLED is that the touch sensors are integrated into the main display, giving you a slim display profile. Samsung now offers this panel to other manufacturers in the market.
OLED screen
And finally you have the OLED or Organic Light Emitting Diode panel. OLED displays operate on their own and do not require a backlight to emit visible light. This technology allows OLED to offer deep blacks and support ultra-thin form factors, be it a TV or a smartphone. Like AMOLED, these also offer efficiency resulting in better battery life.
Different screen resolutions for smartphones
Few screen resolutions have been introduced in the industry over the years. But for smartphones, we are paying special attention to the core quality available in the market these days.
High Definition (HD)
The most standard resolution offered on a smartphone is HD or High Definition. The screen with this resolution produces 1280×720 pixel quality.
full hd
Full HD resolution is the most popular screen resolution that you find on smartphones. Manufacturers have managed to pack display quality on a phone priced between Rs 10,000 and Rs 80,000. Full HD resolution translates to 1920×1080 pixel quality.
2K or Quad HD
Next, you have 2K or Quad HD resolutions that haven’t become mainstream in the market yet. Most of the devices with this screen resolution are in the high-end segment. Other companies like Samsung, OnePlus and Xiaomi have adopted this technology. The screen with this resolution comes with 2560×1440 pixels quality.
4K or Ultra HD
And the last known screen resolution available for smartphones is 4K or Ultra HD. The 4K screen offers 3840×2160 pixels of quality, which is the highest you can get right now, but options are limited to a few brands.
what is aspect ratio
You must have heard people writing about the aspect ratio with respect to the display; Smartphone or television. what does this mean? Aspect ratio is basically the width and height of the smartphone’s screen. The traditional aspect ratio of smartphones has been 18:9, but with the changing trends in the market, adopting the notch and then the punch hole layout, you now have the 19:9 and 20:9 aspect ratios used for smartphone displays. Huh.
What is HDR?
HDR stands for High Dynamic Range. And any smartphone display that supports HDR offers higher contrast levels than a regular display panel. You get more colors out of the display when watching movies or any HDR-compatible content. Platforms like YouTube, Netflix and Amazon Prime Video have started offering some of their content in HDR, which can be viewed on smartphones that come with HDR-supported displays. And you’ll definitely notice a difference in quality between regular and HDR content.
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