TFT LCD display readable in sunlight

TFT mobile phone LCD display is readable in sunlight. As an electrical appliance widely used in public places, high-brightness mobile phone LCD displays are increasingly being chosen by people. So why more and more people want to choose high-brightness TFT LCD screen? Sunlight readability The display allows us to see clear and sharp images or videos even in direct sunlight. Most LCD screens can only provide 150 to 300 lumens of brightness. But outside or in bright conditions, it's important to crank up the display's brightness to ensure a clear image. Most tft displays use transmissive polarizers, which don't perform well in direct sunlight. Generally, we use two common methods to make displays readable in direct sunlight. One: Blocking the sun In this way, we increase the brightness of the TFT LCD screen to between 700 nits and 1000 nits, overwhelming the brightness of the sun, so as to achieve visibility under the sun. However, ultra-bright backlights also have some drawbacks. 1. The brighter the backlight, the shorter the battery life of the screen. 2. It will shorten the half-life of LED. Half-life is the time, measured in hours, before the brightness of an LED reaches half of its brightness when it was first turned on. Many LEDs maintain a half-life of 70K hours if driven with normal current. Overdriven LEDs can reduce the half-life to 20K hours or less. 3. Brighter backlights generate more heat, which may shorten the display. Two: The relationship between the semi-reflective polarizer and the sun The semi-reflective polarizer can reflect a large proportion of sunlight and greatly reduce the erosion caused by sunlight. Reflective LCD displays have grown in popularity in recent years. As costs decrease, more and more people are choosing this type of display for applications that require sunlight readability. Even though it still costs more than transmission displays, the gap is closing. Transmissive displays are mostly high-end screens, and there are many applications, such as industrial, medical, marine electronics, etc., which need to be readable in sunlight. This makes the market grow day by day.

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