The use of liquid crystal filters in photography Abstract.

This article introduces knowledge about liquid crystal filters, including their role, characteristics, methods of use and common problems.

Usage and common problems

Overview

In photography, we often use some auxiliary equipment, such as flash, tripod, etc., and today we want to introduce is used to take photos of the "tools", it is - liquid crystal display (lcd). lcd is a flat panel display that can control the light-emitting principle and characteristics of the display through the current, consisting of a certain number of color or black and white pixels. There are three main types of lcd currently on the market.

tft type (thin film transistor), stn type (low temperature polycrystalline silicon) and cft type. The first two types of lcd belong to the active matrix liquid crystal display device, the latter is a passive matrix display device.

tool introduction.

tft type LCD tft that triniti film transistor abbreviated form, "tft" refers to the thin film transistor type liquid crystal display technology. The core of this technology is integrated by the integrated circuit to drive the screen of each individual backlight tube emitted by the light changes to achieve the color display. As each backlight tube can choose the timing of the switch and the size of the voltage independent control of their respective light output strength thus greatly improving the uniformity of the screen brightness and improve the image color reproduction ability to make the image more realistic and natural more rich in layers.

stn type LCD stn is the abbreviation of s per twisted nematic, "stn" is the technical name of super twisted column LCD panel. It uses indium tin oxide semiconductor chip perpendicular to the glass substrate as the electrode of electroluminescence to form the electric field distribution to achieve light.

The full name of cfd is short for color field display, which means color field display. Its working principle is the use of backlight emitting red, green and blue light through the polarizer into rgb three primary colors and then three diodes discrete red, yellow and green phosphor for mixing and finally after the phosphor screen of the picture tube to show the corresponding color effect.

The application areas.

1. Digital camera camcorder digital SLR camera cell phone camera video recorder dv camera, etc.

2. digital TV digital HD set-top box digital projector, etc.

The use of methods.

1. installation method first need to use the lens installed into the camera body and then the prepared lcd into the lens slot can begin to use.  

2. operation steps

(2.1) turn on the power open the camera battery cover will be loaded into the battery.

(2.2) adjust the brightness open the menu settings to adjust the screen brightness.

(2.3) adjust the contrast open the menu settings to adjust the contrast of the screen.

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