Parts of The LCD TV (1)

The following is part of the LCD TV with a brief explanation for each function:

1. Front Panel Display

When compared with CRT TV then the Front Panel LCD Display is a Flat panel of his generally currently used mammal TFT LCD. Although many were using Plasma technology.

On the front panel display block is the Backlight to produce white light across the surface of the LCD. Diffuser that serve as filters, Polariser, backlight Back arrangement of TFT LCD, RGB Filters and Polariser Front.

The workings of the Front panel LCD display, more or less at the time of the LCD gets voltage then the molecule is a molecule crystals will be composed into horizontal so that the light from the translucent layers of the backlight can be front LCD. This could happen because the LCD is very crystal molecules between solid and liquid.

2. Backlight and Inverter

Backlight is part which also includes Front Panel Display. Inverter here is not part of the main power supply. We often see on the edge of the LCD if we overhaul will look like a small transformer transformer, that is the inverter. Its function is to change the voltage DC 12V into 1000 – 4000 VAC.

Because the display requires a voltage that is large enough so that it can produce a bright light. The Backlight itself is currently commonly used with type LED lamps.

3. TCON Board/FRC Matrix

The TCON is also a unity with The LCD Panel display, backlight and inverter. We know on CRT TV image is generated when electrons are controlled by Yoke def. CRT tubes fired at the luminous colours of so. The difference with this light the LCD is generated from every pixel on the LCD.

There are thousands of pixels/pixel LCD and every element has one transistor to be able to turn on/off the pixel.

The lighting of this pixel is controlled by a module or TCON Board FRC module is determined, the transistor which is active or inactive.

On the modules provided a TCON connector that has a pin that much to be connected to the main board. This module is usually closed aluminium to avoid interference.

4. Main PCB/Main Board

The function of the module in the main board is to process all signals that either an audio or video that is captured by a tuner. Still remember how to work the TV not CRT, where images are processed by the main IC got fed into a series of RGB Video amplifier for later given directly into the tube CRT.

In contrast to the workings of TV CRT, LCD there is a process to convert analog signal video signal into digital form – due to the presence of thousands of pixel transistor controlled by modules TCON.

On the main module includes tuner, analog to digital converter, mikrokontrol, determine which input is used and a variety of other TV functions.

Because there are still many parts of the LCD TV that has not been described, then this article will continue to section 2, ... may be useful

Motion Sensor Components In Electronics

Perhaps we never got into a huge mall with automatic door open as we approach the door? that is one of the application components of the motion sensor in the electronics. Components that can detect movement commonly referred to as PIR or Passive Infrared Sensors.

PIR sensors can detect small movements of this and also feel if there is any man who moved out of range sensor.

For those of you who do not know this motion sensor PIR, its small, low power consumption and not easily worn away with quite a hefty hargayang. Also called PIR is also called Pyroelectric IR or motion. Not to be confused with the light sensor that yesterday I had a chance to discuss also, both are often used in a series of sensors. This is a form of censorship of PEARS:

How does it work? PIR motion Sensor works by measuring infrared energy that is detected by sensors that exist therein. They do not emit infrared itself so it is referred to as passive. Whereas in ordinary IR sensor, usually needed an infrared beam/laser as an indicator of the existence of light detected. Think about it like this way of working motion sensors:

Infrared energy is produced by heat, humans and animals including can produce heat even though small, an average rate of 9-10 micrometer infrared energy.

Usually range motion sensor this can reach 5 meters. Quite effective as a motion sensor is not it? Also note how the image above, this sensor PIR can't detect how much the number of people who were in the area range of the sensors, can only feel a change in heat energy/infrared only.

How much is a motion sensor PIR? If you are interested in based on the info I get the price could range anywhere between 200 thousands. Quite expensive, but in the hands of people who are creative, can be useful tools/missing .

Knowing The Value Of The Resistors Burned

Various kinds of damage to the TV is very likely to happen and not even frequent there are components that are on fire, to find out the value of the resistors burned I have little tips.

Surely we as techs often confusion how when finding a resistor that his condition had been burned in a series of PCB TV so it's not possible to know/to read the value of the resistor.

To be able to apply the techniques that I will need to first outlines we know how the heck the structure/offal from these resistor component itself?

According to the definition, his special kind of carbon Resistor is a very commonly used consisting of a resistive element that has hindered nature/forms such as tubes and has a metal lid has a wire at both ends.

This carbon wrapped wire on both ends and then soldered and printed color code. About like this structure the appropriate definition of offal resistor above:

Can be inferred from the value of the resistor is the value of the carbon that is wrapped by the upholstery of the resistor itself isn't it?

So if we find a resistor burning and trouble finding its value then we can split the 2 resistors with pliers cutters and then we measure from the carbon pieces to the legs of the resistor that is still intact. Likewise with carbon the other. And then both of them combined.

No doubt the result is not accurate because after all the resistors are burned, but at least we have a reference value. Value added this myself would not show the actual values benar2. Therefore after summing the value of both pieces of burning resistor resistor value should assume the most approaching, list the value of the resistor that is commonly seen in the value of the resistor that exist in the market.

And of course the most important see also where the resistor is mounted in series. For example, if we find the value of the resistor with the above trick discovered the value of 100 k. But in the series resistor is used as a Fuse Resistor that is usually worth 0.1 – 1 Ohm, so we should really observant .

Hopefully the article about knowing the value of the resistors burned this is helpful to fellow technician

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The Transistor as an amplifier

The Transistor as an amplifier is one function of the amount of the transistor, apart from functions use the transistor as a switch too of course.  The current existence of a transistor in an electronic device is a must, for example, Tone Control, Amplifier (Amplifier end), the pre-amp and a series of others.

Signal input Transistor can make a great on the output current can be corroborated, could brupa DC and AC current prinsispnya to use in a transistor amplifier is as "a small current in the base used to control a larger current is given to the collector of the transistor is passing."

This means that when the base current is changed then the reinforcement of the case and the larger currents will flow from collector to emitter, this condition can be described as reinforcement using transistors.

Not only can strengthen signals, can also be used as a transistor amplifier current, voltage amplifier or amplifier power. The following is an illustration of the transistor amplifier circuit as used in the amplifier is simple:

Still remember the principle on the transistor as a switch? , where the condition of the transistor in saturation/arus base that flowed quite large so that the collector and the emitter relate gratitude as a cable connected, whereas at the moment conditions are cut off, the collector and the emitter could relate gratitude as a switch between the collector and the emitter has a very big obstacle, now in use as a transistor amplifier "not" be on the conditions of the two. Or it could be said that the base of the transistor is in the condition between the cut-off and saturation.

In addition to the transistor is able to work with optimum working point of the amplifier with transistor must also be determined, there are several types of amplifier, which is determined by the load line AC/DC:
Amplifier class A amplifier, at this point it works around type landscaped load line.
Class B amplifier has a point of work in areas cut off.
Amplifier class C under the areas cut off.
Amplifier class AB amplifier is a type which is a combination of class A and class B that work interchangeably with NPN and PNP transistor type.

For this type of amplifier types I will explain in more detail at a later time , but the earlier we must understand in advance with work I described transistor as an amplifier of, may be useful

Related Words:

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Light Sensor Components

Light Sensor is a sensor that allows you to detect light and then convert it into signals to electrical signals are then used in a missing that use light as a triggernya.

There are several commonly used light sensors for example LDR (Light Dependent resistor), photo Transistor or a diode and a PhotoTransistor, Photodiode, photo/component this component is widely used in electronic circuits. The following is a more detailed explanation of each light sensor:

LDR

Photo resistor/photoresistor/ LDR is basically a resistor whose resistance value (in ohms) depending upon how much of the light that falls onto the surface of the sensors are.

The workings of this LDR is resistance will increase when it is not exposed to light (night) and will turn into a small resistance when exposed to light (daylight), LDR is typically combined with some transistor for membentul series automatic headlights. Fortunately there is no special code to read the value of the resistor is this light

Photodioda

Photo diodes or commonly referred to as Photodioda is a type of diode component which is capable to detect light. As well as ordinary diodes, this component has a P-N, it's just made sensitive to light.

This type of light can affect the diode of this photo which is infrared light, sunlight, ultra violet and x-rays. The use of the photo diode is very varied, as the countdown the number of vehicles on the highway automatically, as the light meter in digital cameras as well as the sensor on the equipment in the medical field.

Phototransistor

Next is a photo Transistor or Phototransistor. Phototransistor is simple is a bipolar transistor using contact (junction) base-collector who became a surface so that it can receive the light so it could be functioned as light sensor.

Phototransistor has better sensitivity when compared to diodafoto, this is because Electrons are generated by photons of light at the foot of the injeksikan junction in at the Base of the transistor to later reinforced at the foot of C/Kolektornya.

The disadvantage is, the response of the light Sensor Phototransistor will slower compared to a diode-photos.