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Address: No. 301-305, Building N3, T5, Tianan Cyber City, Fenggang Town, Dongguan City, Guangdong Province, China
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Lastest company news about Interface and Selection of LCD Module
Interface and Selection of LCD Module
Hotdisplay has prepared a wealth of LCD module interface options for different users and different application scenarios: RS232/RS485/UART; MCU; LVDS/EDP; VGA/HI & RGB;SPI/MIPI RS232/RS485/UART HOTLCD intelligent TFT module is specially designed for industrial display applications and supports RS232/RS485/UART interface. Customers can pre-store a variety of display patterns in the module, and realize the rapid change and refresh of the screen, so as to achieve a wonderful display interface. The intelligent display module can greatly reduce the load of the host on the display interface and reduce the requirements on the host, thereby reducing system hardware cost and design difficulty, while improving stability and reliability.   The UART interface is simple and reliable, and is widely used in embedded systems, communication equipment, industrial control equipment and other fields. Its advantages include faster transmission speed, simple and easy to implement interface, and low cost. At the same time, the UART interface also has some disadvantages, such as inability to perform multiplexing, limited transmission distance, and limited transmission speed. Therefore, in some high-speed and long-distance data transmission scenarios, the UART interface may not be applicable, and other more complex interfaces need to be used. MCU In compact products, it is usually only necessary to provide bus interfaces to peripherals, and it is recommended to use MCU interface products. Designers can choose 8-bit or 16-bit interface products according to their needs. LVDS In industrial control equipment, due to system and structural limitations, the distance between the display and the main board is relatively long. HOTLCD's LVDS products are the ideal choice for TFT display solutions, which can place the main board in a protected position, meet the design requirements for the display to be far away from the main board, and provide reliable display effects. VGA/HI PC-level industrial control motherboards usually have a VGA or HI display interface, and with HOTLCD’s various sizes of industrial-grade VGA/HI products, it can not only meet the display function, but also improve product stability and structural compatibility, allowing customers The design of the whole machine is more flexible. RGB A new generation of higher-performance MCUs all have TFT controllers inside. In the case that the motherboard and the display are close, the RGB interface (also known as TTL interface) products of HOTLCD can bring better cost advantages to the overall design and meet the application of industrial control environment. SPI The advantages of the SPI interface include reliable data transmission, simple use, etc., so it is widely used in many fields, such as industrial control, communication, automotive electronics, embedded systems, etc. The SPI interface is only 3L/4L and does not need to occupy multiple pins, so it is very suitable for use in application scenarios with limited pins of the main control chip. The disadvantage of SPI is that the communication speed is slow, and it is only suitable for displays below 3.5 inches and low resolution (320x480). MIPI The MIPI interface also features low power consumption, enabling longer battery life for mobile devices. In addition, the MIPI interface is flexible in design and can be customized according to specific application scenarios, such as defining different protocols, rates, and data bandwidths. Therefore, the MIPI interface has been widely used in mobile devices, automotive electronics, smart home and other fields.
Lastest company news about How to distinguish industrial LCD display from consumer display?
How to distinguish industrial LCD display from consumer display?
If the display is divided according to the industry, it can be divided into two categories: industrial LCD display and consumer display. Although both are used for display, the requirements for industrial LCD displays are higher than those for consumer products, which we can understand from the following aspects. Stability Compared with the use environment of consumer displays such as our mobile phones, computers, and televisions, industrial LCD displays are much harsher. An exaggeration is: the industrial LCD display is like a grass living in the desert, while the consumer display is a flower growing in the fertile soil with abundant rain and sunshine. First of all, industrial LCD display screens are powered on almost 365 days a year. Secondly, according to different uses and environments, industrial LCD displays are required to have different characteristics. Such as high stability, anti-interference, vibration, shock, and temperature changes, etc. Applied in the LCD display screen of the 5G base station computer room, it needs to monitor the operation of the system 24 hours a day. If the LCD display we use is unstable and cannot work normally in a harsh environment, it will affect the operation of the entire network system. So, that's something consumer displays can't match.   Sunlight readability Good visibility is a major feature of industrial LCD screens. Most of the LCD screens used in industry are surrounded by strong light, such as strong sunlight on a sunny day. The LCD display for outdoor work needs to work under direct sunlight for a long time, which requires our display to have readability under strong light. Many of Hotdisplay's products have this feature, such as our 7-inch TFT LCD charging pile display. Applied outdoors, it is also clearly readable under strong direct sunlight. Widely favored by new energy charging pile customers.   Customizable Consumer LCD displays are all standard. For example, when you go to buy a product's latest mobile phone, you think the screen is too big and you want a smaller one. At this time, you can't ask the manufacturer to customize a model with exactly the same configuration and a small display screen for you, but choose to buy a model that is closest to what you want. Industrial LCD displays are different, and manufacturers can customize them according to customer needs if conditions permit. For example, if you want to develop a full-view, wide-temperature, and touch-screen product based on the standard product, we can help you realize it. Of course, the mold opening fee may be higher. This is one of the reasons why industrial LCD displays are more expensive than consumer LCD displays. HOTLCD has many customized products, here, you can always find an LCD display solution that suits you. Strict selection of materials (high-quality raw materials) Another advantage of industrial LCD display is that in the whole product, we use industrial-grade high-quality raw materials, because only LCD display products designed and produced with high-quality components can pass various strict standards. Test: anti-static (ESD) and electromagnetic (EMI) interference, aging test, high and low temperature test, etc., so that the whole machine has high and low temperature resistance, anti-interference, and withstands extreme impact. Generally, the raw materials used in consumer display products are all mid-range materials. All LCD display products of HOTLCD are delivered to customers after passing strict tests. The quality of our products is widely recognized, and everyone can rest assured of HOTLCD's products. Delivery cycle There is also a big difference in the supply cycle between industrial LCD displays and consumer displays. For industrial LCD displays, under the condition of normal supply of IC, glass and other materials, the supply cycle of industrial LCD displays is relatively long, usually about 10 years. Unless it is a complete discontinuation of the specified material, but we also have an upgrade plan. It can be applied with only a slight modification to the client's equipment, or even no modification at all. Therefore, customers do not need to worry about the scrapping of equipment caused by the suspension of production and supply of industrial LCD displays. Consumer displays are different, such as mobile phones, which are updated very quickly. I don’t know if you have this feeling: you just changed to the latest mobile phone of a certain brand, but it hasn’t been used for half a year, and the overwhelming new product launch conference has started again. In two or three years, the model you use may not be has been discontinued. Therefore, the life cycle of consumer displays is much shorter than that of industrial LCD displays. Price Price is a matter of great concern to everyone. Based on the above points, it is not difficult to see that the price of industrial LCD displays is higher than that of consumer displays. You get what you pay for, industrial LCD displays not only have good configuration, but also have good after-sales service. For example, if you buy a computer, the warranty period is usually 6 to 12 months, and you need to purchase an insurance period. If there is a problem beyond this time, you will need to pay a higher maintenance fee. However, for industrial displays, the warranty period is usually at least 1 year, long even 3 years. If it is a supplier problem, it can also be replaced with a new display. Therefore, although the price of industrial LCD displays is high, the after-sales service is very good and cost-effective.   Epilogue As an industrial liquid crystal display expert with nearly 20 years of design and production experience, HOTLCD is constantly developing new display solutions while ensuring high-quality products, just to meet customer needs. If you have any questions about LCD displays, please feel free to leave us a message.  
Lastest company news about What's COG Display?
What's COG Display?
Abstract For industrial, automotive, and portable equipment designers,Chip-on-Glass (COG) liquidcrystal display (LCD) modules offer many advantages compared to traditional LCD modules with a packaged LCD driver. This white paper compares COG modules to conventional LCD modules,showing the key differences between the two, and explaining why COG modules are thinner,have greater reliability, offer flexible design, and are more cost effective. Introduction • LCDs are often supplied as LCD modules which have built-in driver circuitry that simplifies installation and improves reliability. However, the addition of packaged driver circuitry in LCD modules also results in a number of disadvantages because it: ◇ Increases the thickness of the display ◇ Raises the costs ◇ Creates greater vulnerability for failures of the modules • All of these drawbacks are important considerations when it comes to displays for industrial, automotive and portable equipment. That’s whydesigners in these areas should strongly consider using Chip-on-Glass (COG) LCD modules. Chip-on-Glass (COG) LCD modules offer a very thin profile, enhanced reliability, and a reasonable price. The Chip-on-Glass Concept • In a conventional LCD module, the LCD driver is mounted on a PCB at the rear of the module. This more than doubles the overall thickness of the display. The drive connection is made using either fixed pins or elastomer connectors. For the connectors, several bonds are required for every drive input to the LCD.And because LCDs generally require many drive inputs (even when multiplex drive techniques are used),the quality of these bonds is a critical factor in determining reliability. • In comparison, COG modules have the LCD driver mounted directly on an overlapping edge of one of the glass plates that make up the LCD. The resulting module is an integrated display, less than 3 mm thick,with all connections from the LCD driver to the LCD completely isolated from the environment. With COG modules, each connection requires only one bond, which ensures optimal reliability of the module. An Inside Look at Chip-on-Glass Manufacturing • LCD Cell Production ◇ In a COG module, one of the two glass plates that make up the LCD is extended to make room for an LCD driver to be mounted and connected. As with conventional LCDs, ITO (Indium Tin Oxide) electrode patterns are created on the surface of the glass plates. In COG LCDs, these patterns are extended to include a connector track for the LCD driver. In addition, an external connector is also used at the edge. ◇ For reliable operation, the resistivity of the connector tracks to the LCD driver must be lower than the resistivity of the ITO connections used within a conventional LCD cell. To enable ACF bonding technology,the LCD drivers are produced with gold bumps on the connecting pads. The connections between the LCD driver and the interface connector are also formed by ITO, with wide tracks recommended for low impedance. The tracks to the display can be of higher impedance, but for ideal balance, they should beroughly the same impedance (all rows, all columns). Chip Bonding with Anisotropic Conductive Film (ACF) • For Chip-on-Glass manufacturing, three components are required: LCD cell, LCD driver and the ACF(connecting media), as shown in Figure 3. ◇ The ACF consists of an epoxy (similar to UV curable glue) containing electric conductor beads. ◇ The conductor beads assure contact between the gold bumps of the LCD driver and the ITO conductors on the glass. Curing of the ACF glue establishes the necessary pressure between the chip and the glass to ensure a good electrical connection between the bumps and the tracks on the glass.Roughly 30 beads per bump guarantee reliable contact. ◇ Due to the surface tensions of the glue on the conductor beads, there will be no horizontal contactbetween the beads, thereby avoiding short circuits between neighboring gold bumps of the LCD driver. COG Supports Many Design Options Another benefit of COG technology is that it supportsa broad range of display designs, with few limitations: • The placement of the LCD driver can be on any side of the active display area. This allows optimal use of available space around the display (for example, to attach switches). • Any type of liquid crystal technology can be used:   ◇ TN: LCDs using Twisted Nematic (TN) technology produce black pixels and characters against a clear background. Ideal for multiplex rates up to 1:8. ◇ STN: Super Twisted Nematic (STN) technology is used for displays requiring a high multiplex rate.This technology provides a high-contrast display with a wide viewing angle. ◇ ABN: Displays with Advanced Black Nematic(ABN) technology provide very high contrast ratios with true black pixels and characters, wide viewing angles and only a slight temperature-dependent performance and color shift.   • COG technology allows the cascading of LCD drivers to enlarge the number of display elements (pixels). • One of the few limitations of COG technology is that only LCD drivers with gold-bump contacts can be used. Illumination The rear-side display polarizer has a reflective coating to match the required illumination mode:   • Reflective mode: A continuous reflective coating allows viewing in ambient light • Transmissive mode: The back polarizer is left clear and the display must be illuminated from behind • Transflective mode: A thin reflective coating offers sufficient reflection for viewing by ambient light and allows backlighting to shine through, so the display can be used in dim conditions. For transmissive and transflective mode displays, the following backlighting systems can be used:   • LED: Several LEDs are mounted in a flat (3 mm to 4 mm deep) box that includes a light guide which distributes the light evenly over the display. LED backlights are available in many colors and produce a bright display when supplied with a low DC current. They have a very long lifetime of up to 1,000,000 hours. • EL panel: A phosphor-impregnated sheet that provides very even illumination when supplied with AC voltage (typically 100 V (RMS) at 600 Hz). EL panels have a very thin profile but are not as bright as LED backlights and draw more current. They have a typical lifetime of 2,000 hours. • Incandescent lamp: A low cost, but rather bulky,illumination system can be created using conventional light bulbs. The display must be carefully designed to avoid uneven illumination. Connectors The tracks leading to the edge of the glass allow the COG module to be connected to a microcontroller. Several methods can be used to enable this connection: • Flexfoil: Fixed directly on the glass with a hermetically sealed bond. Flexfoil offers a highly reliable and flexible connection system. • Fixed pins: Clipped to the edge of the glass, fixed with conductive glue and sealed with epoxy, fixed pins offer a very stable and low-cost connection method that is recommended for most applications. The pins can be soldered directly to a PCB or fitted to a suitable interface connector. • Glued-on connector: Glued directly to the edge of the glass and protected by a plastic housing, this type of connector offers an alternative, low-cost solution. Side-by-Side Comparison of LCD Module Manufacturing Methods Compared to LCD modules with a packaged LCD driver, COG modules offer major benefits with onlyvery few disadvantages for equipment designs as shown in the table below: Side-by-Side Comparison of LCD Module Manufacturing Methods Industrial, automotive, and portable equipment designers should strongly consider utilizing COG LCD modules for their LCD needs. COG modules are considerably thinner, more reliable, flexible, and more cost effective than traditional LCD modules with a packaged LCD driver. For COG modules, go to www.hothmi.com
Lastest company news about 4.3 Inch 480x272 Sunlight Readable Capacitive TFT Display GT911/TFT-H043A22WQIST8C40
4.3 Inch 480x272 Sunlight Readable Capacitive TFT Display GT911/TFT-H043A22WQIST8C40
TFT-H043A22 – 4.3 inches 480x272 IPS TFT SPI interface with RTP resistive/CTP capacitive touch panel display two solutions TFT-H043A22 is a 4.3-inch wide viewing angle IPS TFT-LCD with resistive touch panel (RTP) display module with a resolution of 480x272 pixels. The module has a built-in T.B.D integrated driver IC, which supports SPI and MCU interfaces. In addition, T.B.D controller IC with embedded MCU interface technology simplifies the system structure, it uses object-oriented method to establish a convenient way to intervene MCU8080. Enables engineers to quickly and efficiently design UIs and deliver robust solutions with high-resolution displays and reduced bill-of-materials costs. TFT-H043A22 adopts IPS panel technology with wide viewing angle Left: 80 / Right: 80 / Up: 80 / Down: 80 degrees (typical value); high contrast ratio 800:1 (typical value), brightness 850 nits (typical value), The modules are made of bright glass. High resolution: 480x272, self-contained driver, no need for external driver, directly used by MCU Ultra-fast speed, theoretically up to 86 frames per second Adopt resistance/capacitance touch screen, support single point or 5 points touch at the same time, good control effect The onboard backlight circuit only needs 3.3V&5V power supply, no need to apply high voltage Support MCU 8/9/12/16-bit 8080 parallel port connection, easy to connect Support 16/18/24 bit color depth, rich colors Support backlight brightness control, convenient brightness adjustment Gold-plated pure copper pin row, immersion gold processing Humanized design, each interface is marked with silk screen, easy to use and easy to install, the working temperature of the TFT-H043A22 module is -20°C to +70°C, and the storage temperature is -30°C to +80°C. TFT-H043A22 Specifications Diagonal size 4.3 inch Resolution 480 x RGBx272(TFT) mm Module size 105.46x67.11x4.30mm Active area 95.04 x 53.856 mm Pixel pitch 0.198(H) x 0.198(V) mm LCD type TFT transparent Viewing angle 80/80/80/80 Aspect ratio 16:9 Backlight type LED, WHITE TFT driver IC T.B.D (CTP GT911) TFT interface SPI/MCU 8080 Touch Panel Resistive/Resistive Touch Panel (RTP/CTP) Surface Anti-glare