1934 Optoelectronics

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The first LCD (Liquid Crystal Display) was developed in the 1930s by the RCA Corporation. Originally called the "Back Porch Projector", it was not until 1934 that the technology was applied to the commercial application. While its development was groundbreaking, the modern LCD can trace its roots all the way back to the first use of polarized light, which dates back centuries.

First, a thin layer of liquid crystal material is sandwiched between two pieces of polarized glass. When an electrical current is applied to the liquid crystal, it twists and refracts the light that passes through it. By changing the electrical current, the orientation of the molecules can be changed, thereby changing the amount of light that passes through the liquid crystal. By manipulating the electrical current, images can be displayed on the LCD.

When the electricity passes through the LCD, a thin layer of liquid crystal material is located between two pieces of polarized glass. When an electrical current is applied, the material twists and refracts the light that passes through it. By manipulating the current, images can be displayed and the user is able to see an image. By changing the orientation of the molecules, different colors can also be formed.

LCDs are widely used in laptop screens, computer monitors, TVs, and mobile phone displays, among other devices. They are popular because they are thin and flexible, consume relatively little power, and are easier to read than older display technologies such as cathode ray tubes (CRTs).

OLEDs (Organic Light Emitting Diodes) are becoming increasingly popular and are a direct descendant of LCDs. OLEDs are made up of thin films of organic materials that, when electric current passes through, emit colored light. This means that OLED displays do not need a backlight like LCDs, making them thinner and more efficient.

Graphic displays are an important type of display module used in many applications. They are used in control systems, numeric computers, applications with complex graphics, navigation systems, and more. Graphic displays are most often used to display information in an easy-to-understand format, such as graphs, bar or pie charts, or even animations.

In summary, LCDs, OLEDs, and graphic displays are all display modules used in a variety of applications, each with its own advantages and disadvantages. Since LCDs were first introduced in 1934, they have become a trusted and widely used technology, while OLEDs and graphic displays offer newer, more advanced display technologies.

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