Lcd - liquid crystal display, Computer Graphics

Assignment Help:

LCD - Liquid Crystal Display

  • A liquid crystal display consists of two glass plates each containing a light polarizer. One glass plate contains vertical polarizer and the other plate having horizontal polarizer.
  • Horizontal polarizer acts as a filter, allowing only the horizontal component of light to pass through and vertical polarizer allows only the vertical component of light to pass through.
  • Rows of horizontal conductors on one glass plate and columns of vertical conductors on the other glass plate are built in to address individual pixels. The intersection of these rows and columns define the pixel grid. The conductors are transparent.
  • A liquid crystal layer exists between the two glass plates. The liquid crystal means a compound which has crystalline structure of its molecules, yet it flows like a liquid.
  • Ambient light is captured at one glass plate, vertically polarized and then is rotated (phase of the light wave changed) to horizontal polarity during the period it passes through the liquid crystal layer. Then it passes through the horizontal filter. Light is then reflected back through all the layers to the viewer, giving an appearance of lightness.
  • However, if the liquid crystal molecules are charged, they become aligned and no longer allow the light to change its polarity when the light passes through them. If this occurs, no light can pass through the horizontal filter, so the screen appears dark. To do this we simply apply voltage between two intersecting conductors residing in two glass plates.
  • Crystals can be dyed to provide color.
  • Screen is refreshed at a rate of 60 frames per seconds using a refresh buffer. An LCD may be backlit, so as not to be dependent on ambient light. This is known as passive matrix LCD. However, ambient light is rarely used now a days.
  • Most of the LCD are manufactured using active matrix LCD. In active matrix LCD, transistors are placed at every pixel location to control voltage and to prevent charge from gradually leaking out from the liquid crystal cells.
  • TFT (thin film transistor) is most popular LCD technology today.

Related Discussions:- Lcd - liquid crystal display

Education training process, Education training process falls into three gen...

Education training process falls into three general categories: 1) Instructor Support Products: These are used through teachers additionally to text books, lectures and other

Matlab, need help in coding

need help in coding

Fill in the blanks, a__________of a scene is apart of a scene by which rela...

a__________of a scene is apart of a scene by which relate one part of the scene with the other parts of the scene

Distinguish between uniform scaling and differential scaling, Distinguish b...

Distinguish between uniform scaling and differential scaling?  When the scaling factors sx and sy are assigned to the similar value, a uniform scaling is produced that maintain

Production of animation , Historical and traditional methods for productio...

Historical and traditional methods for production of animation                                              Definition: Computer animation is a time depends phenome

Explain about unified memory architecture, Q. Explain about Unified Memory ...

Q. Explain about Unified Memory Architecture? UMA signifies Unified Memory Architecture. It is an architecture that reduces the cost of PC construction.  In this a part of main

Data set, In this project, the image data set consists of 320 training imag...

In this project, the image data set consists of 320 training images and 285 test images. Table 1 shows the image data set in details. In addition to the original images, th

Types of touch panels - input and output devices, Types of Touch panels ...

Types of Touch panels 1) Electrical TSS: Wire grid or the other conductive coating is utilized to specify a voltage drop at the point touched point from that the position ma

Transformation for isometric projection - transformation, Transformation fo...

Transformation for Isometric projection - Transformation Suppose that P(x,y,z) be any point in a space.  Assume as a given point P(x,y,z) is projected to the P'(x'y',z') on t

Role of computer graphics in education and training, Question: Explain how ...

Question: Explain how computer graphics would play a useful role in education and training. Answer: Computer graphics has occupied an important role in education and training.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd