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 LED or OLED,How to Choose?

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 LED or OLED,How to Choose?

2024-07-01

When it comes to buying a TV or monitor, many people are confused by the different technologies available: LED and OLED. This article will delve into the differences between LED and OLED, helping you make an informed decision.

Understanding LED Technology

 

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1. Basic Principle

LED (Light Emitting Diode) is a device that emits light through the recombination of electrons and holes. LEDs themselves do not emit light directly; they emit light by releasing energy through recombination when a voltage is applied. The earliest LED products appeared in 1962, emitting low-brightness red light. With technological advancements, LED lighting now covers the entire visible spectrum.

2. Applications

LEDs are widely used in various fields, including but not limited to:

Lighting devices: Household bulbs, street lights, car signal lights, etc.
Displays: Large advertising billboards, traffic signals, TV screens, etc.
Special lighting: Stage lighting, medical lighting equipment, etc.

3. Brightness

The brightness of LEDs usually depends on voltage, current, and power. Indoor LED screens typically have a brightness of around 1000 nits, while outdoor LED screens can reach up to 5000 nits.

 

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Understanding OLED Technology

 

1. Basic Principle

OLED (Organic Light Emitting Diode) is a technology that emits light by applying voltage to organic materials. An OLED screen consists of multiple layers of organic films that emit light when current passes through them. Unlike LEDs, each pixel in an OLED can emit light independently, eliminating the need for a backlight.

2. Applications

Due to its excellent display performance and flexible application scenarios, OLED is widely used in high-end electronic devices, such as:

Smartphones: High-end brands like Samsung and Apple.
Televisions: High-end OLED TVs are known for their excellent color performance and ultra-thin design.
Wearable devices: Smartwatches, fitness trackers, etc.
Other electronic devices: Tablets, laptops, digital cameras, etc.

3. Display Performance

OLED screens offer superior color performance, reaching 100% of the NTSC color gamut and meeting the high requirements of the BT 2020 color gamut. Additionally, OLED screens have higher contrast because each pixel can independently emit light and turn off, achieving true blacks.

Eye Health: OLED vs LCD

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1. Blue Light Impact

Both LCD and OLED emit blue light, which can potentially harm the eyes. Blue light is a high-energy visible light that can cause eye fatigue and even retinal damage with prolonged exposure.

2. Brightness Adjustment

OLED adjusts brightness by controlling the emission frequency. Higher frequencies mean higher brightness, but this can be more damaging to the eyes at lower brightness levels. LCD performs better in low light conditions, causing less eye strain.

3. Screen Flicker

OLED flickers at lower frequencies, usually around 240Hz, while most LCDs flicker at frequencies above 1000Hz. According to IEEE reports, flicker frequencies below 1250Hz have less impact on eye health. Thus, long-term viewing of LCD screens is more comfortable than OLED screens.

Brightness: OLED vs LED

1. OLED Brightness

The brightness of OLED is generally around 600 nits. To increase the brightness, current needs to be increased, but this can affect the lifespan of the OLED.

2. LED Brightness

The brightness of LEDs depends on voltage, current, and power. Indoor LED screens typically have a brightness of around 1000 nits, while outdoor LED screens can reach up to 5000 nits. In terms of brightness, LEDs have a significant advantage over OLEDs.

Display Performance: OLED vs LED

1. Color Performance

OLED screens offer superior color performance, reaching 100% of the NTSC color gamut and meeting the high requirements of the BT 2020 color gamut. LED screens typically reach about 72% of the NTSC color gamut.

2. Contrast

OLED screens have higher contrast because each pixel can independently emit light and turn off, achieving true blacks. LED screens, requiring a backlight, cannot achieve such high contrast.

3. Screen Thickness

Without the need for a backlight, OLED screens are very thin, about one-third the thickness of LED screens, or even thinner. Additionally, OLED panels can be flexible, which is impossible for LED panels.

Lifespan: OLED vs LED

1. Screen Burn-in

OLED screens are prone to burn-in after prolonged use, where some pixels are permanently damaged, leaving a permanent image ghost. LED screens do not suffer from burn-in.

2. Overall Lifespan

Due to the tendency of OLED screens to burn in, their lifespan is generally shorter than that of LED screens. In this aspect, LED screens have an advantage.

Conclusion

Both LED and OLED have their unique advantages and disadvantages. LEDs excel in brightness and lifespan, while OLEDs offer superior color performance and screen flexibility. The ultimate choice depends on individual needs and budget. If you need a high-brightness, long-life display, LED might be the better choice; if you prioritize color performance and screen flexibility, OLED is the way to go.

I hope this article helps you make a more informed decision when purchasing. If you have any questions, feel free to leave a comment, and we will be happy to assist you.