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Select The Viewing Angle of The 4.3-inch LCD And Maintenance Methods

Views: 233     Author: Reshine Display     Publish Time: 2024-01-30      Origin: Site


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Select The Viewing Angle of The 4.3-inch LCD And Maintenance Methods

1. How to Change the Viewing Angle of a 4.3-inch LCD?

The 4.3-inch LCD has always been a popular size. We are all aware that each LCD screen of various sizes has a unique set of specifications and parameters, and there are numerous factors to consider when making a decision. Reshine Display will then discuss the issue with you.

1.1 Overview of the Viewing Angle of the 4.3-inch LCD

The visual angle of the screen is the maximum angle required for the user's acceptable image quality. LCD screens reflect differently in every direction. In the horizontal direction, the lower the angle between the line of sight and the screen, the lower the brightness; when the brightness falls to 50%, the viewing angle is defined. The wider the viewing angle of the screen, the greater the viewing range. The brightness is adequate when viewed within the viewing angle; however, it is insufficient when viewed outside of the viewing angle. The concept is closely related to grayscale inversion. When the user exceeds a certain angle (viewing angle), the color of the display changes abruptly, which is most noticeable when gray dominates the display image.

The 4.3-inch LCD's viewing angle is measured in four directions, starting from the display's normal axis. In theory, the maximum angle is 90 degrees, but the angle in each measuring direction may vary. The three-dimensional angular range is known as the observation cone. Click here for 4.3 Capacitive Touch Screen.

1.2 Types of viewing angles for 4.3-inch LCD displays

The most common matrix types for 4.3-inch LCD screens on the market are TN, VA, MVA, and IPS.

TN LCD is the most economical technology. The angle is typically narrower than other types, but the low cost and short matrix reaction time compensate for the smaller visual taper. To increase the visual angle, an O-shaped film can be applied to the display screen. When purchasing a TN 4.3-inch LCD screen, always consider the viewing direction as indicated by a small perspective. It indicates which direction the user should look at the display screen.

VA and MVA 4.3-inch LCD screens have short reaction times, wide viewing angles, and high contrast. We classify them as TN or IPS.

IPS matrix technology not only has the majority of the benefits of VA, but it also has excellent color restoration and the highest visual angle on both axes. The most common disadvantage of IPS is that it has a lower black color depth than the VA type.

1.3 What perspective does my 4.3-inch screen module require?

If the project requires a high visual angle, select an LCD screen with a full viewing angle (178.5°~180° per axis). In this case, you should look for MVA and IPS LCD displays. When price is the most important factor, purchasing a TN display allows you to save money.

Remember to select the appropriate direction for your application. The simplest rule is that when looking from above, select the 4.3-inch screen at noon, and when looking from below, select the display at 6:00.

Reshine Display is a pioneer in the embedded device industry, specializing in multi-functional thin film transistor liquid crystal displays, general asynchronous transceivers, and Android solutions. If you're interested in our products, please contact our official customer service online, and we'll provide you with excellent service!

2. What are the LCD Maintenance Methods?

A liquid crystal is a substance that exists somewhere between solid and liquid states. It is an organic compound that is normally liquid, but its molecules are arranged in the same pattern as solid crystals, hence the name liquid crystal. LCD is a type of display used in digital clocks and many portable computers, with many advantages such as "low power consumption, no radiation, no vertigo" and so on. LCDs are now ubiquitous in everyday life, appearing in notebook computers, LCD TVs, mobile phones, SLR cameras, and other devices. Nowadays, liquid crystal display screens have become an essential electronic product for many people. So, what are the LCD maintenance methods?

2.1 Check the LCD

The method of observation is to check for obvious display problems by seeing, hearing, touching, sniffing, and so on. Observation should be not only careful but also thorough. The contents are typically observed to include abnormal phenomena such as deformation, discoloration, and odor in the surrounding environment and the display, such as whether the safety tube is blackened, the filter capacitance is abnormal, and there are significant virtual solder joints. We can roughly estimate the size and scope of the problem by looking for clearly damaged components, and we can even locate the problem immediately.

2.2 Visual inspection method of LCD

The LCD module's intuitive inspection method means that when the display is abnormal, the majority of the problems can be seen on monitors like the display screen. During maintenance, the possible location of the problem is determined based on the observed problems, as well as the cause and process of the problems provided by the user, after preliminary analysis. As the display's circuit structure becomes more complex, problems in different parts may exhibit the same behavior, implying that a problem could be caused by a variety of factors. This necessitates careful observation, inspection, and analysis before determining the true cause of the problem and resolving it.

2.3 Static resistance measurement of LCD

The static resistance measurement method primarily determines whether there are significant short-circuits and short-circuit components. Short-circuit components must be excluded before power-on maintenance; otherwise, the problem will enlarge and increase the difficulty and cost of maintenance.

2.4 LCD Module Current Measurement

Measuring the load and working current of transistors and IC chips is a fundamental aspect of circuit maintenance. It is used to determine whether the load on integrated circuits, transistors, and power sources is normal or abnormal. If the transistor or IC chip is in normal operation, the measured load current should also be normal. If the measured current deviates significantly from the normal value, there may be a problem with the circuit, which should be investigated thoroughly.

2.5 Voltage measurement for LCD

Another method commonly used to maintain the display circuit is voltage measurement, which primarily measures the working voltage of the circuit and components to determine the location and components that are malfunctioning. For example, measuring whether the + 300V DC voltage in the power supply circuit is normal, whether the starting voltage is normal, whether the protection circuit is active, whether the output voltage is normal, and so on.

All of the information mentioned above pertains to the introduction of LCD maintenance mode. LCD has now completely replaced CRT as the mainstream display technology. If water has entered the LCD, place it in a warm place to gradually evaporate the moisture. If you want to extend the life of an LCD and slow its aging, you must use it with care.

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