How To Choose The Right High Brightness LCD Panel?
Due to the increasing use of electronic products, there are many electronic

products used outdoors. How to choose a high-brightness LCD panel, the article

content will give you a few points on how to choose a high brightness LCD panel.

What are the special requirements for high brightness LCD panel?

1. The brightness should be high, visible in the case of direct sunlight, the

brightness of the high brightness LCD should be 1000-3000nit.

2. High temperature and low temperature resistance; high brightness LCD panel

operating temperature should be -30℃ to +70℃

3. The anti-drop performance should be reliable; the high-brightness LCD panel

should be able to meet the drop test.

4. The product perspective should be large, the display should reach 89 above

the full viewing angle

Does high brightness of LCD panel lead to high power consumption?


The brightness of the high brightness LCD panel is determined by the brightness

of the backlight. There are many ways to increase the brightness of the backlight,

Classified by whether increasing power consumption:


1. Directly increase the power consumption to increase the brightness of the

highlighted LCD screen.


increase the number of LED lights，


increase the current of the LED lamp.


The advantage is to increase the brightness directly.


The disadvantage is that the power consumption is increased and the heat

generation is increased.


2. A conventional design that does not increase power consumption but can

increase brightness.


Use a film with higher optical effects, such as high brightness, high

transparency, high reflectivity


LED light with large chip can increase brightness under the same power

consumption


The advantage is that the brightness can be further improved, and the cost

performance is higher, and the power consumption is increased by zero.


The downside is that costs are rising significantly.


The Importance of High Brightness LCD Displays For A Range of Industries



Liquid-crystal display, or better known as LCD, is a flat-panel display

technology that primarily uses liquid crystals. Although liquid crystals do not

directly emit light, experts use reflectors or backlights to produce colorful or

monochromatic images.


Think of these liquid crystals and their light-modulating properties being

sandwiched between thin glasses. A diversely wide range of applications benefits

from LCD technology. Commonly known applications are televisions, smartphones,

computer monitors, cockpit displays, digital signage, and touch screen displays. It

is also applied to other electronic products

such as DVD players, clocks, and video game devices.


Advancements in industrial touch screen flat-panel liquid-crystal displays


In nearly all fields and applications, LCD has replaced the older, bulkier

display technology that is known as cathode ray tube or CRT. LCD offers more screen

size options, which makes its flexibility more appealing to both consumer and

provider. An LCD screen is thin and light and requires lower power consumption than

a CRT display.


A industrial high brightness LCD display can consume

much lesser than a heavy CRT display screen. Due to its low power consumption,

there is little heat emitted while it is used. LCD screens also display sharper

images that cannot be smeared using a native resolution. It also has a masking

effect – an LCD grid can create an illusion of higher image qualities. Compared

again to a CRT display, the LCD is preferable as it emits almost no electromagnetic

radiation.


The Industries That Benefit from LCD High Brightness Displays


Many people may think that tech industries utilize LCD technology more than

any other public or private field/sector. That is true to an extent. However, it is

also a fact that people nowadays depend on the efficient and affordable

technologies constantly developed in the modern age; thus, any institution or

organization also depending on commercial investments or services would normally

need the advantages offered by LCD.


LCD high brightness monitors are inexpensive, making them a viable option

for companies that manufacture smartphones and other electric or handheld gadgets.

In the world of advertising, commercial services may make use of LED screens since

they are better for large-scale outdoor displays. On the other hand, some companies

may use LCDs if they want to provide displays for enclosed spaces.


LCD touchscreen technology versus LED


Although LCD and LED are significantly different, LCD is more commonly used

in touchscreen technology. LEDs emit more light naturally, but a high brightness

LCD display can still attract

the attention of the viewer. Video display-developing businesses utilize LCDs more

than commercial businesses in a way that they utilize the technology to develop

laptops, desktops, and all-in-one touchscreen computers. Laptops have a growing

demand because of its own capabilities and advantages, and several laptop brands

have already started to conduct other technological integration into LCD.



What is the impact of high working temperature on the LCD strip screen?


1. Too high temperature will cause devastating damage to the LCD strip screen


（1）LCD displays are usually packaged with silicone. If the working

temperature exceeds the solid phase transition temperature (typically 125 °C), the

packaging material will become a rubber state and rapidly heat and expand,

resulting in an open circuit and failure of the LCD bar screen.


（2）If the operating temperature of the

strip LCD display

exceeds the maximum load-bearing temperature of the chip, its luminous rate

will drop rapidly, resulting in light attenuation. The life of an LCD screen is

reflected by the attenuation of light, that is to say, the brightness of the LCD

screen will decrease over time.


2. The reason why temperature affects the luminous rate of the LCD bar screen:


（1）As the temperature increases, the concentration of electrons and holes

increases, the band gap decreases, and the electron mobility decreases.


（2）High temperature will shift the blue peak of the chip to the long-wave

direction, causing the chip's wavelength to not match the phosphor's

wavelength, thereby reducing the light extraction efficiency outside the liquid

crystal display.


（3）As the temperature increases, the quantum efficiency of the phosphor

decreases, the luminescence decreases, and the light extraction of the liquid

crystal display decreases, resulting in a decrease in the brightness of the liquid

crystal display.


Since both LED and LCD TVs are based around LCD technology, the question

remains: what is the difference? Actually, it’s about what the difference was.

Older LCD TVs used

cold cathode fluorescent lamps (CCFLs) to provide lighting, whereas LED LCD

TVs used an array of smaller, more efficient light-emitting diodes (LEDs) to

illuminate the screen.


Since the technology is better, all LCD TVs now use LED lights and are

colloquially considered LED TVs. For those interested, we’ll go deeper into

backlighting below, or you can move onto the Local Dimming section.


Backlighting


Three basic illumination forms have been used in LCD TVs: CCFL backlighting,

full-array LED backlighting, and LED edge lighting. Each of these illumination

technologies is different from one another in important ways. Let’s dig into each.


CCFL Backlighting


CCFL backlighting is an older, now-abandoned form of display technology in

which a series of cold cathode lamps sit across the inside of the TV behind the

LCD. The lights illuminate the crystals fairly evenly, which means all regions of

the picture will have similar brightness levels. This affects some aspects of

picture quality, which we discuss in more detail below. Since CCFLs are larger than

LED arrays, CCFL-based LCD TVs are thicker than LED-backlit LCD TVs.


Full-array backlighting


Full-array backlighting swaps the outdated CCFLs for an array of LEDs spanning

the back of the screen, comprising zones of LEDs that can be lit or dimmed in a

process called local dimming. TVs using full-array LED backlighting to make up a

healthy chunk of the high-end LED TV market, and with good reason — with more

precise and even illumination, they can create better picture quality than CCFL LCD

TVs were ever able to achieve, with better energy efficiency to boot.


Edge lighting


Another form of LCD screen illumination is LED edge lighting. As the name

implies, edge-lit TVs have LEDs along the edges of a screen. There are a few

different configurations, including LEDs along just the bottom, LEDs on the top and

bottom, LEDs left and right, and LEDs along all four edges. These different

configurations result in picture quality differences, but the overall brightness

capabilities still exceed what CCFL LCD TVs could achieve. While there are some

drawbacks to edge lighting compared to full-array or direct backlight displays, the

upshot is edge lighting that allows manufacturers to make thinner TVs that cost

less to manufacture.


To better close the local-dimming quality gap between edge-lit TVs and full-

array back-lit TVs, manufacturers like Sony and Samsung developed their own

advanced edge lighting forms. Sony’s technology is known as “Slim Backlight

Master Drive,” while Samsung has “Infinite Array” employed in its line of QLED

TVs. These keep the slim form factor achievable through edge-lit design and local

dimming quality more on par with full-array backlighting.


What is local dimming?


Local dimming is a feature of LED LCD TVs wherein the LED light source behind the

LCD is dimmed and illuminated to match what the picture demands. LCDs can’t

completely prevent light from passing through, even during dark scenes, so dimming

the light source itself aids in creating deeper blacks and more impressive contrast

in the picture. This is accomplished by selectively dimming the LEDs when that

particular part of the picture — or region — is intended to be dark.