Reasons for unclear display of LCD segment code screen

Date:2022-04-24

The segment code LCD screen cannot be seen clearly and is blurry. This term can be used in the terminology of segment code LCD screens to explain the issue of ghost shadow or character light. For friends who want to know about this issue, they can take a look. Simply put, ghost shadow refers to the display of content that should not be displayed on the screen, which is caused by the driving voltage of the circuit to the segment code LCD screen being greater than the working voltage.

And the word light, as the name suggests, when the font in the segment code screen is displayed, the color is very light, which can cause great trouble for users. If this phenomenon occurs, it is likely that the driving voltage supplied by the circuit to the LCD screen is lower than the operating voltage of the LCD screen itself.

To solve this problem, just balance the voltage between the two. On the contrary, what happens if the driving voltage supplied by the circuit to the LCD screen is greater than the operating voltage of the LCD screen itself? It will be blurry and unclear to see. The solution to these two situations needs to be set according to the working voltage, and the direct resistance between the VDD and VLCD of the LCD screen needs to be adjusted. When the working voltage is not enough, the display text is light, and the color of the font or display pen segment is relatively light. This is the opposite of the reason for ghosting. The circuit causes the driving voltage of the segment code LCD screen to be lower than the working voltage, which is caused.

However, there is another special situation that causes unclear or blurry viewing of segment code LCD screens, which is related to their viewing angle. It should be noted that segment code LCD screens have different viewing angles, such as the commonly used 6 o'clock and 12 o'clock viewing angles. Without considering the display type of the screen, for example, a screen with a perspective of 6 o'clock can clearly see the displayed content when viewed vertically from 6 o'clock to the screen. Therefore, if we look at this screen from the 12 o'clock direction, it will be unclear or blurry, and we need to re mold and adjust it to the correct perspective direction.

Except for some full view VA segment code screens and STN segment code screen series segment code screens, many other materials of LCD screens do not use full view. So usually many segment code screens are made into: 9 o'clock perspective (such as a car's central control electronic clock) 6 o'clock perspective (electric meter), 3 o'clock perspective, 12 o'clock perspective, etc. For example, if the visual angle of a segment code screen is in the 9 o'clock direction, then you need to look at the segment code screen from your own position towards the 9 o'clock direction. If you look at the 3 o'clock angle, it is very likely that you will not be able to see clearly.

In this case, it is highly likely that the manufacturer of the segment code screen made a mistake in their perspective during production. Or there was an error in communication. The consequences are also quite serious, that is, to overturn and start over, and to customize the segment code screen again.

So when customers choose a segment code LCD screen for mold opening, they need to consider various aspects such as the viewing angle, working voltage, and temperature. If the desired display effect is not achieved, they need to re mold and adjust the desired display effect. This will result in loss of mold opening fees and time. When customers choose, the parameters are particularly crucial, and they must confirm the specifications.

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