quality TFT LCD Display & TFT LCD Module factory

   Low Blue Light mode, a new feature that became popular around 2016, has now become a standard feature on monitors. According to media reports, blue light has already made people pale at the sound, as its harm to the eyes has been verified through medical examples. The low blue light mode usually uses a slider or a series of preset forms to gradually reduce the blue light in the image. After enabling this function, it has a certain impact on the overall color presentation of the screen, but it is indeed necessary for protecting the eyes.                           response time Response time, also known as standard response time, refers to the time required to turn off a pixel, then turn it on and off again (or from black to white and back to black). The response time of a monitor is divided into standard response time and grayscale response time. If the response time is too long, there may be "blurriness" and "ghosting" when playing games or watching movies. The general experience for consumers when making purchases is that the shorter the response time, the better. Additionally, it should be noted that the response time is divided into two parts: Tr (rise time) and Tf (fall time). The transition from black to white is called rise, and from white to black is called fall. The response time is the sum of these two values. However, some manufacturers only label one of these two values to mislead consumers, so it is important to understand them clearly when making a purchase.   Curved display Monitors are divided into regular flat displays and curved displays. In theory, curved screens provide a wider viewing angle and an immersive experience, with smaller curvature radii resulting in greater curvature. To reap the benefits of curved surfaces, you need a large 100 inch screen and sit very close, which may give you a more immersive "movie" experience. But you may not want such a big TV or computer monitor, and you may not want to sit so close. If your monitor is not that big, a curved monitor is actually not very useful.                         Brightness/contrast Liquid crystal is a substance between liquid and crystal, and cannot emit light on its own, so the brightness of the backlight determines its brightness. Generally speaking, the higher the brightness of a LCD display, the more vivid the displayed colors and the better the display effect; If the brightness is too low, the displayed color will be darker, and you will feel tired after watching for a long time. Contrast is the ratio of brightness, which refers to the brightness of a white image divided by the brightness of a black image in a dark room. Therefore, the brighter the white and the darker the black, the higher the contrast, the clearer and brighter the displayed image, and the stronger the sense of color hierarchy. For consumers who frequently use computers to play games or do graphic processing, they should choose LCD displays with higher contrast. For users who have a special preference for DVD blockbusters, high brightness/high contrast LCD displays are the most suitable choice. Of course, higher brightness and contrast are not necessarily better. Watching a high brightness LCD screen for a long time can also easily cause eye fatigue. Bad pixels "are irreparable physical pixels on a LCD panel, divided into bright and dark spots. Bright spots refer to pixels that still emit light when the screen displays black, while dark spots refer to pixels that do not display color. As their presence can affect the display effect of the image, the fewer bad pixels, the better. Consumers should not choose products with more than three bad pixels when selecting LCD displays. How to test for bad pixels on a monitor? Users can use the Nokia Monitor Test software for testing. In addition to "dark spots" and "bright spots", there are also "color dots" that always display a single color. The light of a LCD monitor is emitted forward through the liquid crystal at a nearly vertical angle, so when we observe the screen from other angles, we will not see it as clearly as we do with a CRT monitor, but will see obvious color distortion. This is caused by the size of the viewing angle. The viewing angle is divided into horizontal viewing angle and vertical viewing angle. When choosing a LCD display, it is advisable to choose products with larger viewing angles. At present, the viewing angle of LCD displays is generally above 140 degrees, which can meet the needs of ordinary users. Regardless of the visual angle value, whether it is convenient for one's own use is fundamental, and it is best to choose according to one's daily usage habits. The warranty period of the monitor is determined by the manufacturer themselves, usually with a full free warranty service of 1-3 years. Therefore, consumers need to understand the detailed warranty period to avoid any problems that may affect their use of the product. Therefore, consumers should try to choose products with longer warranty periods.

1. Outdoor advertising machine runs black screen Check if the air conditioning of the outdoor LCD advertising machine is working and if the internal temperature is too high. If the air conditioning is not cooling, it needs to be replaced. 2. The remote control cannot be operated Check if the remote control of the outdoor high brightness advertising machine is equipped with a dry battery, if the remote control head is aligned with the remote sensing sensor, and if the wire from the remote sensing sensor to the drive board is loose. If there are no issues mentioned above, it may be due to a damaged remote control or driver board. 3. The outdoor advertising machine displays a signal on the screen, but the screen is not full Use the remote control to press "menu" - "setting" - "adjust" to semi automatically adjust the portrait 4. Display screen with image but no sound Check if the video signal cable of the advertising machine is connected correctly, if there is image display during remote control operation, and if the signal source selection is correct. If none of the above issues are found, it may be due to a broken driver board.                            5. Outdoor LCD advertising machine is not powered on (black screen) It may be due to poor internal power supply or faulty internal driver board of the device. Troubleshooting method: Check if the power output is normal. If there is no output from the power supply, it can be confirmed that there is a fault with the power supply; If the power output is normal, it may be a defect in the driver board. 6. Flower screen The situation where a certain area on the surface of the display screen cannot be displayed or the display screen is abnormal is called a splash screen. Troubleshooting method: Check if the signal transmission line inserted into the LCD screen is loose, causing poor contact. If so, insert and secure the signal line, and check if the problem is resolved. If it is not caused by this situation, it may be due to a faulty LCD screen. 7. Dark screen (no display, flashing screen) When playing advertisements, if the LCD screen remains black, dark, or flashing, it is referred to as a dark screen. Troubleshooting method: Check if the power output is normal. If the power output voltage is unstable and does not reach 11V-12V, it can be confirmed that the power supply has a fault. If the power output is abnormal, it is necessary to replace the driver board and inverter one by one until the fault is resolved. 8. No signal When powered on, the words' no signal 'appearing on the screen are called' no signal '. Troubleshooting method: Check if the internal video cable and the 5V power cord input to the decoding board are loose. If they are not loose, replace the decoding board or driver board and check if the fault disappears.

一丶Composition of TFT-LCD panel Disassemble the LCD panel, which can be divided into three main parts: 1. LCD panel 2. TFT panel 3. Backlight module As for other driver ICs or iron frame structures used to fix these three parts, they will not be described separately; The specific decomposition diagram is as follows;                                                二丶The role of each part 1. Backlight source (or backlight module) The backlight layer is actually the structure of the backlight source and the light guide plate, which is a light tube or light-emitting diode that can emit white light. The backlight source is mostly LED light source now. So when TV vendors refer to LED, they actually mean LCD with LED backlight, not real LED. Due to the fact that liquid crystal molecules themselves cannot emit light, in order to display images, liquid crystal displays require specialized light sources to provide light, which is then deflected by the liquid crystal molecules to produce different colors. The backlight serves to provide light energy. After the light tube (or LED) emits light, it is distributed to various places through a light guide plate, and the direction of all the light is concentrated towards the liquid crystal molecules through a reflective plate on the back. Finally, the light is evenly distributed through the prism sheet and diffuser plate to avoid situations where the central brightness is too high and the surrounding brightness is too low.                              The above picture shows a light guide plate, which has a simple function of making the backlight uniform. Upon careful observation, it can be seen that the surface of the backlight panel is densely packed with dots that serve as light guides. Professional optical analysis and production are required to control the density of the dots at each position, thereby regulating the amount of light emitted by the light guide panel at that location. The precision designed light guide plate dots can evenly spread the incident light on both sides on the entire plane; If there are problems with the placement of the light tubes or the light guide plate in the backlight layer, it can easily lead to the appearance of a cathode ray screen; There is also a layer of shiny reflective paper underneath the light guide plate, which has a simple function of reflecting the light from above back. Previously, mobile phones were relatively thick, and the entire backlight module was surrounded and protected by an iron frame. Nowadays, many projects omit the iron frame in order to make it thinner, which can lead to a problem. Once the bottom reflective paper is deformed by force, the reflected light is locally concentrated, resulting in water ripples on the surface of the screen; 2. Diffusion sheet In the backlight structure, it mainly plays a role in correcting the diffusion angle, which increases the radiation area but reduces the light intensity per unit area, that is, lowers the brightness After being diffused by a diffusion material, the luminescent light source can become larger in area and have better uniformity; 3. Brightening film Also known as prism film, it usually has two layers, mainly used to enhance brightness. The prism film is placed between the diffuser of the backlight and the liquid crystal panel. It can converge the light emitted from the diffuser uniformly at various angles to the axial angle, that is, the positive viewing angle, and improve the axial brightness without increasing the total emitted light flux; If the diffusion sheet or prism film is locally damaged, the exported light will have problems, resulting in white spots and other issues appearing on the screen; 4. Two polarizing films on the upper and lower layers The function of polarizing film is to allow light to pass through in one direction. The polarizing layer is made by dyeing and stretching PVA film, which is the main part of polarizing film, also known as polarizing film. It determines the polarization performance and transmittance of the polarizer, while also affecting the color tone and optical durability of the polarizer. 5. Two glass substrates on the upper and lower layers A glass substrate is not just two pieces of glass, it has a groove structure on the inside and is attached with an alignment film, which allows liquid crystal molecules to be arranged neatly along the grooves. TFT thin film transistors and color filters will be affixed on both sides of the upper and lower glass layers. The liquid crystal layer is sandwiched between two layers of glass; 6. Thin film transistor (also known as TFT) We often refer to TFT-LCD, which actually refers to this thin film transistor. Its function is similar to a switch. TFT can control the signal voltage on the IC control circuit and deliver it to the liquid crystal molecules, determining the angle of liquid crystal molecule deflection. Therefore, it is a very important component. 7. Liquid crystal molecular layer The liquid crystal molecular layer is the most important element that changes the polarization state of light, and its arrangement and polarization state are determined by both electric and elastic forces. 8. Color filter The light deflected by liquid crystal molecules can only display different gray levels, but cannot provide the three primary colors of red, green, and blue (RGB). Color filters are composed of RGB filters, which are mixed to adjust the colors and brightness of each color. Each pixel in the LCD panel is composed of three dots: red, green, and blue, with each color dot having a different grayscale variation. A filter is made of plastic or glass with special dyes added. A red filter can only allow red light to pass through, and so on. The transmittance of glass sheets was originally similar to that of air, allowing all colored light to pass through, making them transparent. However, after dyeing, the molecular structure changes and the refractive index also changes, resulting in changes in the passage of certain colored light. For example, a beam of white light passing through a blue filter emits a beam of blue light, while green and red light are very rare and mostly absorbed by the filter

    In this era of rapid technological development, LCD screens are ubiquitous. But how do you get started when you need to purchase a high brightness LCD display screen? Don't worry, I'll give you some tips! Clearly define the usage scenario Firstly, you need to determine whether this screen is intended for indoor or outdoor use. Do you need to work in high or low temperature environments? These will directly affect your purchasing decision. For example, in outdoor environments, you definitely need a screen with higher brightness so that it can be clearly visible in sunlight. Size and Resolution Next, consider the size and resolution of the screen. A large-sized screen can provide you with a better visual experience, while high resolution allows you to see clearer and more delicate images and text. For example, if you need a 4K resolution screen to watch high-definition videos, choosing a 1080p screen may not be suitable. Display effect The display effect is also crucial. You need to consider the brightness and contrast of the screen. High brightness and good contrast ensure that the screen is clearly visible in various environments. For example, a high brightness screen can maintain clarity even in low indoor lighting conditions. Durability and reliability If you need to use the screen outdoors or in harsh environments, durability and reliability become particularly important. Choosing screens with high temperature protection can ensure their stability even after prolonged operation. For example, a heat-resistant screen can work normally even in high temperature environments in summer. Brand and after-sales service Finally, choosing a reliable brand is also very important. Brand products usually have better quality and performance. At the same time, pay attention to after-sales service and understand whether the brand provides timely maintenance and technical support. If you purchase a branded screen, you can receive professional after-sales service support when encountering problems. Related professional knowledge The display principle of LCD liquid crystal display: LCD liquid crystal display uses the polarization properties of liquid crystal molecules to adjust the degree of light transmission, thereby achieving image display. The basic principle is to use electrical signals to control the arrangement of liquid crystal molecules, thereby changing the degree of light transmission. Backlight technology: Backlight is a crucial part of LCD screens, providing light for the screen. Common backlight technologies include cold cathode tube (CCFL) and LED backlight. LED backlight has become the mainstream backlight technology due to its higher brightness and lower energy consumption.   FAQ Can high brightness display screens be used outdoors? Yes, high brightness displays are suitable for indoor and outdoor use. But in outdoor environments, it is necessary to choose a higher brightness display screen to ensure clear visibility even under direct sunlight. What is the impact of the resolution of LCD screens on image quality? The higher the resolution, the clearer the image. Choosing a high-resolution display screen can present finer images and text, enhancing the viewing experience. I hope this information can help you avoid confusion when choosing a high brightness LCD display screen. By understanding this knowledge, I believe you can make wise choices and make your work and life more convenient and efficient!

This article mainly analyzes the core elements of LCD display screen selection, and provides differentiated selection strategies by analyzing key parameters such as resolution, brightness, and contrast, combined with the needs of industrial control, smart home, and car applications. Simultaneously revealing market price patterns and future technological trends to assist consumers in accurately matching products with demand. The selection techniques for LCD display screens mainly include the following aspects: Clear requirements: Firstly, it is very important to clarify one's own usage needs. Different application scenarios have different requirements for LCD displays. For example, industrial control panels require high-resolution and environmentally adaptable displays, while smart home control centers place more emphasis on touch functionality and user interface design experience. Resolution: Resolution is one of the key factors affecting display performance. High resolution pixels have a higher density and can present finer image details. For example, when an industrial control panel needs to display complex data charts, high resolution can avoid text blurring and improve operational efficiency. Brightness and contrast: It is very important to adapt brightness to different usage environments. The brightness of a regular TFT screen is between 300-500 cd/m ², while outdoor high brightness screens can reach over 1000 cd/m ². In terms of contrast, dynamic contrast (such as 1000:1) and static contrast (such as 800:1) need to be selected according to specific application scenarios. Viewing angle: The viewing angle determines the clarity of the screen when viewed from different directions. A larger viewing angle ensures clear images when multiple people share the screen. Generally speaking, the viewing angle of LCD displays above 140 degrees can meet the needs of ordinary users. The screen ratio: which refers to the ratio of the vertical and horizontal dimensions of the screen image, is a crucial consideration factor. When the aspect ratio of the input image does not match the aspect ratio supported by the monitor, the image may appear distorted or missing. In order to meet the needs of home entertainment, current home laptops and desktop LCD displays generally adopt aspect ratio designs of 16:9 or 16:10. Therefore, when choosing, these two ratios of displays often provide more user-friendly display effects. Touch technology: Touch technology affects user experience. Resistive touch is suitable for environments that require gloves or stylus operation, while capacitive touch is more suitable for smart homes and consumer electronics devices. Interface and compatibility: Interface type and compatibility are also factors to consider when choosing. Industrial grade products are usually equipped with LVDS interfaces and RS485/RS232 serial ports, while consumer grade products focus on HDMI, MIPI, RGB and other interfaces, supporting multi platform remote control. Working temperature: Choosing the appropriate working temperature range is crucial for ensuring the normal operation and extending the service life of LCD screens. If the ambient temperature is close to the maximum temperature, it is recommended to choose an LCD screen with a wider operating temperature range, or to maintain the screen within a suitable temperature range through external heating or cooling measures. Brand and Price: Choosing a brand with a physical factory can ensure product quality and after-sales service. High resolution, high brightness, and high contrast display screens are relatively expensive, but their performance is also better. For consumers who pursue high cost-effectiveness, they can choose mid to low end products from well-known brands. Special Features: Choose a display screen with special features based on specific needs, such as anti glare, anti reflection, narrow border design, etc., all of which can enhance the user experience. After sales service: The warranty period for the monitor is determined by the manufacturer themselves, usually with a one-year free warranty service. Choosing a brand and model with good after-sales service can ensure timely resolution of any problems encountered during use. In general, when choosing a LCD monitor, it is necessary to consider the above factors comprehensively based on one's budget, usage scenario, and project requirements. If you can tell me your specific needs for LCD screens, I can provide you with more suitable product recommendations.