1. Categories of the Different Screens (Introduction of monochrome, TFT, and OLED)
2. Monochrome LCD screen(From graphic and segment to describe and conclude)
3. TFT screens(Deep introduction and description of TFT, usage, and technical details)
4. OLED screens(explanation of difference between it and LCD, and its uses and high cost)
5. How to Choose the best screen module? (Budget, uses, customer’s requirements)
6. Final Words about how to make the decision.
Now that the demand for display screens is increasing day by day. How to choose a suitable display is particularly important for making a competitive product. Because it not only involves the display effect, the actual needs of customers, but also the company’s budget and market acceptance.
So in this article, we will introduce in detail several different display screens and how to choose the right display screen for the end product.
To sum it up in a simple sentence: monochrome screens are suitable for industrial products and low-end consumer products, but high-end products in black and white screens are also expensive, and they are generally used in medical equipment and automotive products.
TFT display is the most common type of display. It can be said that TFT can replace it as long as it can be used in black and white screens. Because both TFT and monochrome screens are LCDs.
At present, OLED display screens will only be used in high-end consumer electronics due to its high production process requirements and high material costs. Similar to smart phones, smart watches, smart color TVs, etc.
Mini-led is a new display product, and only a few products will use it, such as the new MacBook. So we won’t discuss it for now
1. Categories of the Different Displays:
There are 3 kinds of display screens. They are:
- Monochrome screens
- TFT screens
- OLED screens
2. Monochrome LCD:
The reason the monochrome screen is called this way is that it only displays characters in one color. Later in the article, we will introduce multi-color monochrome screens, in fact, they can not be called multi-color. Because in the strict sense, they are still texts that only display one color. Thanks to the addition of polarizers and color films, it can display a variety of colors.
Monochrome screens are divided into two types: segment LCD and graphic LCD(It can also be called dot matrix LCD). The difference between them will be introduced in detail below.
Although segment display has a long history, it still occupies a certain weight in industrial control and consumer electronics products.
Needless to say, its benefits are low cost, easy to produce, and can support customized designs. So it is still the choice of many products.
In addition, its power consumption is relatively the lowest, because it only needs to display fixed text and symbols, and if it is made into a reflective display mode, its power consumption is even lower.
It is the smallest unit that an individual can control. It can be in the form of a bar, dot, or icon. The main purpose of this display is simplicity.
In the segment displays, there is no 3-D effect and no range of brilliant colors. They do not contain a touch screen or any other type of human interface.
The LCDs displays work on a simple formula of 1 pin controlling several segments. It is determined by the duty it chooses. For example, ¼ duty means 1 pin controls 4 segments. Besides, there will be extra pins for COM connection. One side PIN assignment LCD will add 2 pins, double side PIN assignment LCD will add 4 pins for COM.
The concept of segment is the representative of characters and patterns. Let’s take the figure of 8 as an example. It has seven segments. The letter A is a segment. Any pattern is also called a segment.
If it’s so difficult to understand, let’s say another way. It will be displayed when you want this segment to be displayed, and it does not need to be displayed when you do not need it to be displayed. This is called a segment. Oh, let’s explain again why there are seven segments in the figure 8 because the figure 8 area needs to display from 0 to 9, so it needs to have 7 segments. In addition, there are 14 paragraphs of 8 characters and 16 paragraphs of 8 characters. Because the customer needs to display different content, there are several options.
Graphic LCD Display:
The dot-matrix screen is better understood than the segment screen. Because it can display arbitrary characters and patterns.
The most common resolution is 128*64. The larger the size, the larger the pixel. This is what we call graininess.
Generally speaking, the resolution of the dot matrix screen can be from 1*1 to 360*360. It is difficult to achieve higher resolutions with the current technology in the industry. For mass production, the defect rate will increase greatly. . Therefore, we recommend using a TFT display for a resolution greater than 360*360.
Color Monochrome LCD Displays:
Color monochrome screens are the same as we discussed before, they are ordinary monochrome screens plus color film or silk screen.
Due to the difficulty in the production process, its price cannot be calculated by simply using a monochrome screen plus the cost of materials. There are also wastage costs, labor costs, and operating costs. Because ordinary workers are not skilled in producing such displays, we need to specifically analyze customer needs and production feasibility when it comes to multi-color screen printing and color film.
Custom LCD Display:
The custom LCD is important for maximizing the efficiency of the display area. The efficiency of the display area is increased by adding custom characters and symbols.
Custom LCD displays help to improve energy efficiency at a very low cost.
The display looks better, readable, and informative due to the specified placement of numeric and alphanumeric characters and more custom symbols.
This display can specify the viewing angles, contrast, and other specifications that give you more good results.
CreateXplay is a professional custom LCD manufacturer company. This company provides designs for Segment LCD and custom designs for monochrome LCD Screens. The great advantage of a custom LCD display is that you can get the type of display and product according to your choice.
3. TFT LCD Displays:
A thin-film transistor liquid crystal display (TFT LCD) is a liquid crystal display (LCD). It uses thin-film transistor technology to improve qualities such as addressability and contrast. TFT technology allows a faster response time because, in this technology, an individual transistor drives each individual pixel.
Explanation of Thin-Film Transistor Liquid Crystal Display (TFT LCD):
TFT liquid crystal display technology uses “field-effect” transistors built by layering thin films on a glass substrate. This technique is usually used for creating microprocessors.
In TFT LCD, each individual controls each pixel and sets an electric field level across the three liquid capacitors. In TFT, one capacitor is used for each subpixel of red, green, and blue in the pixel to control the polarization in the crystal material. The amount of polarization determines the amount of light the color filter from the backlight. Due to this ability of TFT technology, the TFT displays control each pixel directly and quickly. It is also called active-matrix LCD technology.
Uses of TFT:
TFT LCDs offer several uses over other types of displays (CRT, Plasma). It is light, thin, and energy-efficient. That’s why it makes mobile phones, laptops, hang-on wall LCD TVs, flat computer monitors, and other handheld devices screens.
TFT LCDs are also inexpensive, which is an enormous advantage in the display world.
Before the invention of the TFT display, the world used a passive matrix LCD for many years. Passive matrix LCD is used for monochrome displays like calculators, watches (not iWatch), thermostats (not Nest), utility meters, etc. So, the world of TFT LCD is more colorful.
An organic light-emitting diode is also called an organic electroluminescent diode. It is a light-emitting diode in which the electroluminescent layer is a film of organic compound between 2 electrodes that emits light in response to an electric current. One of these electrodes is transparent. OLED is used in digital displays, such as television screens, computer monitors, and portable systems such as smartphones.
There are two types of OLED. These types are based on small molecules and employ polymers. OLED creates a light-emitting electrochemical cell (LEC) by adding mobile ions. It has a different mode of operation due to the addition of cells.
This display drives two matrices: a passive-matrix (PMOLED) or active-matrix (AMOLED) control scheme. In a passive matrix (PMOLED), each row in the display is controlled one by one sequentially. Active-matrix AMOLED uses a thin-film transistor backplane to access directly. They switch each pixel on or off and allow higher resolution and larger display sizes.
Uses of OLED:
OLEDs are used for digital devices. Due to their reliability and durability, they are in high demand in the market. They are used in television screens, computer monitors, pocket mobiles, android mobile screens, mini media players.
5. How to Choose the Best LCD Display?
Nowadays, many monochromatic and color displays have evolved. These displays improved day by day to improve their functions and services to give a better user experience. These displays are more reliable, and they work more efficiently. These displays are used in different fields of life.
The careful and correct selection of displays is very important. The choice of a display depends upon many factors such as BOM cost, software complexity, power, environment, and user experience. So it is a difficult task to choose the right and efficient display for your daily use.
6. Final Words
Monochrome displays are lower cost. They consume lower energy. These displays are simple software designs that are easy to use for the customer.
On the other hand, color displays are more expensive than monochromatic displays. But these displays give you more features than monochrome displays. These displays give you sharp, colorful images and high-performance graphics.
OLED screens are high cost but they are widely used in high-end consumer electronics products.
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