LCD TV looks like it doesn t work as well as the previous TV

The problem of the signal source,What we are looking at now is the analog signal,That is, the cable TV signal,In the past, we watched the picture tube TV,That is analog TV,Why is it clear to watch TV before,It is because the analog signal corresponds to the analog TV in the past,One by one,But now we are still in the analog signal,Can the TV has been replaced by digital TV (that is, LCD TV)Resulting in our current software and hardware do not correspond,If it is replaced with a set-top box access LCD TV, That is the digital signal to the digital TV,One by one,Then the effect will be so good that I don't know if I say this, the landlord doesn't understand,I bought an LCD TV to see clearly,Comfortable to see,It is necessary to improve the software,For example, connect the set-top box,Change high-quality cable TV cable,The signal source is too clean。。。 Wait, I believe it will be much better

That's right,The supervisor of ordinary LCD TV feels the viewing effect(contrast、Color saturation, etc.) is not as good as the original picture tube TV,,It's just brightness、The resolution is higher,But the subjective effect of these two indicators on human eyes,Not obvious。

It is conceivable that you have high requirements for visual effects, then you have bought the wrong TV. In flat-screen TV,The picture effect of plasma TV is relatively closerCRT TV,LCD is worse than plasma,Compared with CRT, it is even worse。 As for why plasma is better than liquid crystal, you will know at a glance.

It's okay to watch blockbusters with LCD TVs,But it's hard to deal with documents,It's difficult to browse the web perfectly,The text is blurred,The corners are not sharp,Although the screen is big enough,It looks the same effort,This phenomenon appears,There are two main reasons。

1) The gray scale gap has a huge impact.

256 gray scale output map, if the PC is connected to the TV, there will inevitably be a 13% gray scale loss And the LCD TV is different, its gray scale range is 16-235, when the signal is received 16, the LCD TV will restore it to white; When signal 235 is received, a full white screen is displayed. The input equipment of TV, such as cable TV signals, DVD players, etc., also output 16-235 grayscale signals. If the LCD TV receives a signal lower than 16, it will be considered dry and will not be displayed; If a signal higher than 235 is received, most LCD TVs can only be clipped, that is, they are still treated as 235 signals.

To put it simply, 0-15 all show pure black, 236-255 all show pure white, and the transition in the middle is all lost.

2) The resolution point spacing is different.

This means that if you connect the above two products to a PC at the same time, the single-screen display content of the monitor can be up to four times that of a TV, and the display font size is smaller, and the image display is more detailed.

The core display device of TV and display is LCD panel,In terms of display technology and principle,There is no difference,But the panel of LCD TV is different from liquid crystal at the beginning of production。 We all know that the fineness of the LCD panel display screen can be measured by the pixels of the picture,TV because the user is not close**,So the pixel interval is large,So the picture is relatively rough,Therefore, the text display is not clear。

TV is mainly used for dynamic pictures,So for the direction of its optimization,Naturally, it tends to be displayed dynamically,And the display is different,Its main thing is**static picture,So the direction of optimization is static display such as text,Although the low-end display is not how carefully optimized,But the process scheme has already been formed,This is incomparable to LCD TV。

1. The image of the TV is blurry when it is turned on, but it gradually improves after a few minutes of start-up, which may be because the moisture in the air around the TV enters the tube socket of the TV, which makes the TV tube socket ignited, resulting in the poor focusing performance of the TV.

2. A magnetic field will form around the TV after being used for a long time, which will affect the imaging effect of the TV and cause the image of the TV to be blurred.

3. When the TV is turned on, the image is blurred and waits until one or twenty minutes later, which is gradually clear, because the tail seat of the picture tube is caused by moisture, and the tail base of the picture tube will affect the focusing pole of the phenomenon tube after being wet, the focusing pole voltage is high and the current is small, when the focusing pole leaks, it will cause the voltage to drop and make the picture tube unable to focus normally.

4. After some TVs are turned on, the remote control is normal, the contrast of the TV screen is also normal, and the screen can also display characters, but the image of the TV is very blurry. This could be a problem with the focusing voltage of the TV.

Is the new TV bigger than the old one?

Summary. Dear,I'm glad to answer for you that the old TV has no display screen after turning on the TV,There are only some noises without images,This situation is likely to be a high-frequency head、There is a problem with the middle release。 According to the working principle of the TV, this reason leads to sound but no image, and the second situation is that there is the sound of a normal TV program, but there is no picture.

This shows that the high-frequency, mid-frequency and accompanying sound circuits are in normal working condition, and there is no line output circuit without short-circuit faults. <>

What to do if the old TV doesn't have a display.

Dear,Wu Zhi is very happy to answer for you that the old TV does not have a display screenAfter turning on the TV,There are only some noises and no images,This situation is likely to be a high-frequency head、There is a problem with the middle release。 According to the working principle of the TV, this reason leads to sound but no image, and the second situation is that there is the sound of a normal TV program, but there is no picture. This shows that the high-frequency, mid-frequency and accompaniment circuits are in normal working condition, and there is no line output circuit without short-circuit.

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Monitors are also commonly referred to as monitors. A monitor is an IO device that belongs to a computer, i.e., an input and output device. It is a display tool that displays a certain electronic file on the screen through a specific transmission device and then reflects it to the human eye.

According to the different manufacturing materials, it can be divided into: cathode ray tube display (CRT), plasma flood display PDP, liquid crystal display LCD and so on. Monitors are also commonly referred to as monitors.

A monitor is an IO device that belongs to a computer, i.e., an input and output device. It can be divided into CRT, LCD, beam roll PDP, OLED and so on. It is a display tool that displays a certain electronic file on the screen through a specific transmission device and then reflects it to the human eye. <>