![]() The structure of an OLED display is shown below. It is also possible to create inorganic light emitting diode displays using inorganic compounds, but as they would not operate stably for prolonged periods when using a direct current, the practical application of OLED displays that include materials that are able to operate with low-voltage direct currents has begun. Organic compound refers to compounds (other than CO, CO 2, etc.) containing carbon (C), and a typical example of a familiar organic compound is plastic. In STN LCDs, the angle of twist is 120 degrees or more. This is the basic principle of a twisted nematics (TN) LCD. The light that passes through the first polarizing filter will be blocked by the second polarizing filter and will not go through. Since the alignment direction of liquid crystal molecules depends on voltage, applying voltage causes them to line up along the electric field and untwist, also allowing light to be untwisted. The axis of the light vibration that has passed through the polarizing filter is also twisted 90 degrees as it travels through these liquid crystals. The liquid crystals are sandwiched by arranging these two panels with their grooves crossed at right angles, causing each layer of liquid crystals molecules to gradually twist until the top layer is at a 90-degree angle to the bottom one. They are formed so that the liquid crystal molecules line up along the grooves. The two panels sandwiching the liquid crystals are grooved. Let's take a closer look at the structure of an actual LCD. Using voltage to control the way these rods are arranged is the basic principle behind LCDs. The angle at which the rods are arranged defines the level of brightness in between. When they are arranged vertically, however, light can pass through. Explained simply, when these rods are arranged horizontally, light from the bottom cannot pass through. Liquid crystal molecules have a rod-like shape. Liquid crystals used in displays must have their molecules arrange in an orderly fashion at room temperature and also react sensitively to voltage, changing their orientation. LCDs produce images by using liquid crystals to either transmit or block light. LCDs employ this liquid crystal property. In liquid crystal state, molecules are arranged with moderate but not complete regularity. When a liquid becomes a solid, the molecules lose their fluidity and fall into an orderly arrangement. A liquid consists of molecules that flow and are in a disorganized state. It was later learned that such state changes were due to the change in the arrangement of molecules within substances. ![]() At 14 degrees Celsius, it went from a solid to a cloudy fluid (liquid crystal), and at 179 degrees Celsius it became a clear liquid. ![]() While he was observing cholesteryl benzoate, Reinitzer noticed that it went through two stages. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |