The term remote control, which can also be called "remote" or "controller", is omitted. It is understood that many other people's names, such as "clicker's", "change", "splash" and "magic hand", are common. Remote control is used to send commands to TV or other consumer electronic products (such as audio system and DVD player) from a distance. Usually, small-sized remote control devices hold the buttons of the same series of objects wirelessly and adjust various settings, such as TV channels and numbers. And quantity. In fact, for most modern devices, this control includes all functions, and the control device itself has only a few basic main controls. Most of these remote controllers communicate with each other, and their respective devices emit infrared (ir) signals, and several of them emit radio signals. They are usually made of small AAA or AA batteries.
history
Nikola tesla gave one of the earliest examples of remote control in 1893, and his U.S. patent 6 13809 named a method for moving a vehicle or an instrument control mechanism of a vehicle.
1903, Leonardo Torres quevedo introduced telekino, an academician of the Paris Academy of Sciences, with a briefing and experimental demonstration. In the same year, he obtained patents in France, Spain, Britain and the United States. Telekino, a robot, said that the executed command would transmit electromagnetic waves. It is the first radio control instrument in the world and a pioneer in the field of remote control. 1906, in front of the king and a large group of people, Torres successfully demonstrated this invention in the port of Bilbao, guiding the ship from the shore. Later, he tried to use telekino to shell and torpedo, but he had to give up the project because of lack of funds.
The first remote control model plane flew to 1932, and the remote control technology was used for military purposes, which was one of the achievements during the Second World War and was defeated by the German Wasserfar missile.
By the end of 1930s, some radio manufacturers had provided remote control for some of their high-end models. Most of these measures are connected to a set of controlled wires, but Phil Koenigma Control (1939) is a battery-powered low-frequency radio transmitter [1], so it became the first consumer electronic device with wireless remote control.
Television remote controller
The first remote controller for controlling TV was invented by Zenith Broadcasting Company in the early 1950s. Remote-by default, the so-called "laziness" is to connect to cable TV. Improve the cumbersome settings of a wireless remote controller. The so-called "flashmatic" is in 1955, from a brilliant light beam to a photoelectric battery. Unfortunately, cells can't distinguish light from other sources, and flashmatic also requires the remote controller to point at the receiver very accurately [1].
From 65438 to 0956, robert adler developed Zenith Space Command, which is a wireless remote control. This is mechanical, using ultrasound to change the channel and volume. When the user places a button and presses the control on the remote control, it will click on a column, so it is called "Clicker's". Each bar emits different frequencies and circuits to find this noise on TV. The transistor of the invention makes the electronic remote controller loaded with piezoelectric crystal as cheap as possible. The piezoelectric crystal is fed by an oscillating current with a frequency close to or exceeding the lower limit of human hearing, but it is still sound to dogs. The receiver contains a microphone connected to the circuit, which is tuned to the same frequency. In this way, it is considered that some problems of the receiver will lead to unexpected noise that naturally occurs. Some people, especially young women, can hear harsh ultrasonic signals. There is even a famous event in which a toy xylophone changed the channels of these types of TVs because some colors of the xylophone matched the ultrasonic frequency of the remote control.
With the development of the BBC's ceefax teletext service, the power of more complex TV remote controllers appeared in the late 1970s. Most commercial remote controllers had limited functions at that time, sometimes only four: the next stop, before the station, to turn up or down the volume. This type of control can't meet the needs of scientists. There is a three-digit number on the map. The remote controller selects a teletext page, which will require buttons for each number from 0 to 9, as well as other control functions, such as switching from text to image, and controlling the amount, station, brightness, color, intensity, etc. Ordinary TV. Early teletext used wired remote control to select pages, but continuous use of remote control requires teletext to quickly show that this is necessary for wireless devices. So BBC engineers began to talk with one or two TV manufacturers, resulting in an early prototype, which can control more functions from 1977 to 1978. ITT Industry is one of them, and later it was renamed ITT Industrial Protocol Infrared Communication. [ 2 ]
Other remote controls
In 1980s, Steve Wozniak of Apple founded this company and appointed cl9. The purpose of this campaign is to create a remote controller that can operate multiple electronic devices. The core unit, named after the remote control device of the controller, was introduced in the autumn of 1987. The advantage of this remote control is that it can "learn" the remote control signals of other different devices. It can also perform specific or multiple functions at different times and run 24 hours a day. This is also the first remote controller, which can be connected to a computer and load the latest software code for distribution as needed. The core unit has never had a huge impact on the market. It is too complicated for the general user program, but it is well received by those who know how to plan. These obstacles eventually led to the death of cl9, but one of its employees continued to operate under the name of celadon. This is the first computer-controlled learning remote control on the market. [ 3 ]
Since the beginning of 2 1 century, the number of consumer electronic products in most families has greatly increased. According to the data of the Consumer Electronics Association of America, the average American family has four remote controls. Up to 5 or 6 remote controllers may be needed to run home theaters, including cable or satellite TV receivers, video recorders or digital video recorders, DVD players, televisions and sound amplifiers. Several of these remote controls may need to be used in sequence, but this process is becoming more and more complicated because there is no guide to accepting interfaces. Many experts, including Jacob Nelson, a famous usability expert, and robert adler, the inventor of modern remote control, explained how confusing, clumsy and frustrating remote control has become.