What is Contrast Ratio

-
Contrast ratio is a figure used to measure the luminance difference between the brightest white and the darkest black. The contrast ratio will be listed as y:z where 'y' is the brightest white and 'z' is the darkest black.A recent example of the ratio is 10,000:1 meaning there are 9,998 shades of gray between the darkest black and the brightest white that the TV will produce.

Dynamic vs. native Contrast ratio

Native contrast ratio is a narrower measurement generated also by manufacturers to denote that the ratio is confined at least to white and black measurement from the same screen at the same time from the same source. This would compare to ANSI checkerboard pattern.Native contrast ratio is what the panel alone can do, whether OLED or LCD (or plasma, may it RIP).

Dynamic refers to the practice of varying the LED backlights behind the LCD screen to achieve better contrast. The intensity of the LEDs behind the LCD screen are dimmed in dark scenes and brighten when showing bright scenes. With local dimming, the dark parts of the screen can get darker, while the bright parts stay bright. Good local dimming can make LCD TVs perform much better.

Comments

Post a Comment

Popular posts from this blog

What Is Global Positioning System - Introduction To GPS - How It Works

-
Image
The Global Positioning System (GPS) is a satellite-based navigation system made up of at least 24 satellites. GPS works in any weather conditions, anywhere in the world, 24 hours a day, with no subscription fees or setup charges. The U.S. Department of Defense (USDOD) originally put the satellites into orbit for military use, but they were made available for civilian use in the 1980s. GPS or Global Positioning System is a network of orbiting satellites that send precise details of their position in space back to earth. The signals are obtained by GPS receivers, such as navigation devices and are used to calculate the exact position, speed and time at the vehicles location. GPS is well-known for its military uses and was first developed by the US to aid in its global intelligence efforts at the height of the Cold War. Ever since the early 1980s, however, the GPS has been freely available to anyone with a GPS receiver. Airlines, shipping companies, trucking firms, and drivers...
Read more

List of Hijacking of Indian Aeroplanes - 1971, 1981, 1982, 1984, 1993, 1999

-
Image
1971 January 30 : An Indian Airlines plane on its way from Srinagar to Jammu was hijacked by Hashim Quereshi and Ashraf Quereshi of the JKLF, who took it to Lahore. Zulfikar Ali Bhutto, then Foreign Minister of Pakistan rushed to Lahore and met the hijackers and helped them get maximum international publicity. On February 1, he persuaded them to release the crew and passengers who were then sent by road to Amritsar. The Government of India sought permission of Pakistan to send a replacement crew to fly the aircraft back to India. Pakistan authorities denied the permission. Instead it is alleged they supplied petrol to the hijackers with which they burnt the aircraft on February 2. From Lahore Airport the hijackers were taken into a procession as heroes. 1981 September 29 : An Indian airlines plane on flight from Srinagar to Delhi is hijacked by Sikh Terrorists and taken to Lahore. Pakistan took commando action and got all passengers released. 1982 August 22 : A lone mili...
Read more

Zombies (Bot and Botnets)

-
Bot  : A ‘bot’ is a type of malicious code that allows an attacker to take complete control over the affected computer – turning the computer into a “robot” that the criminal can remotely control. Once infected, these machines may also be referred to as ‘zombies’. While taking over one computer is useful, the real value comes from collecting huge numbers of computers and networking these so they can all be controlled at once (a botnet). There are between 100-150 million computers worldwide (out of 600 million PCs on the Internet) infected with bots and under the control of hackers. Botnet : A botnet is a group of computers connected in a coordinated fashion for malicious purposes. Each computer in a botnet is called a bot. These bots form a network of compromised computers, which is controlled by a third party and used to transmit malware or spam, or to launch attacks. A botnet may also be known as a zombie army . Originally, botnets were created as a t...
Read more