Views: 235 Author: Reshine Display Publish Time: 2024-02-20 Origin: Site
How can you choose an appropriate touchscreen for your project? The number of steps required to adjust or change a touchscreen varies depending on the individual task.
Assessment: Determine what precise requirements or adjustments you want for the touchscreen. This could include modifying its sensitivity, adjusting its calibration, or personalizing its interface.
Research and Tools: Based on your assessment, look into the tools or software required for the work. This may include calibration software, diagnostic tools, or specialist equipment.
Preparation: Turn off the touchscreen device and detach it from any power source to avoid any electrical catastrophes.
Software Calibration: If you need to alter the sensitivity or calibration of the touchscreen, go to the instructions supplied by the device maker or the software you're using. This could include accessing settings or diagnostic menus and following on-screen instructions.
Physical Modifications: If you're going to physically alter the touchscreen (for example, cutting it to a specific shape), make sure you have the right tools, such as precise cutters, gloves, and safety equipment. Always follow the manufacturer's instructions to avoid harming the screen.
Testing: After making any tweaks or modifications, test the touchscreen to check it works properly. Check for responsiveness, accuracy, and potential problems.
Finalization: Once you're satisfied with the changes, complete the setup by securing any loose components, ensuring all connections are secure, and reassembling the device as needed.
Any touchscreen adjustments must be approached with prudence and following the device manufacturer's specific rules or suggestions. Additionally, some jobs may necessitate professional assistance or specific knowledge, so consult professionals as needed. Click here for 21.5 Capacitive Touch Screen.
LCD does not emit light; rather, it is a passive display technology that displays by irradiating liquid crystal material with external light. The figure shows the basic structure of the LCD.
The basic structure of an LCD is depicted in Figure 10-1. The liquid crystal material is sandwiched between two conductive glass electrodes: upper (front) and lower (back). The liquid crystal molecules are stacked vertically and twisted 90 degrees at the top and bottom. External incident light travels through the upper polarizer to produce polarized light, which is rotated by 90° through the parallel-arranged liquid crystal material before being reflected by the reflector through the bottom polarizer, which is perpendicular to the upper polarizer and transparent. If the upper and lower electrodes, plus a certain voltage, under the action of the electric field forced to add the electrode part of the liquid crystal molecules into a vertical arrangement, the role of its spinning disappears, resulting in the polarized light incident from the upper polarizer is not rotated, the light cannot be returned to the lower polarizer, and it is black. When the voltage is removed, the liquid crystal molecules return to their twisted configuration. As a result, the electrodes can be shaped in a variety of ways to display different words, numbers, and images.
1) Classification using electro-optical effects The electro-optical effect refers to the role of electricity in causing the original arrangement of liquid crystal molecules to alter, resulting in changes in the optical properties of the liquid crystal box, i.e., electricity modulating light through the liquid crystal molecules.
LCD liquid crystal displays are classified into three types based on electro-optical effects: electric field, current, and electro-thermal. The electric field effect can be classified as twisted nematic (TN), GH, or super-twisted (STN), among others. TN-type and STN-type LCDs are now often employed in microcontroller applications.
2) Classification based on display content LCDs can be classified into three types based on their display content: field type (also known as stroke type), dot-matrix character type, and dot-matrix diagram.
Field-type LCDs are liquid crystal displays made up of lengthy, brushstroke-like display pixels.
The dot matrix character set has 192 built-in characters, including numbers, letters, and common punctuation marks. Users can also customize 5x7 and other dot matrix characters. Depending on the LCD model, there can be one, two, or four lines per screen, with each line displaying eight, sixteen, twenty, twenty-four, thirty, or forty characters.
In addition to displaying characters, the dot-matrix form of LCD liquid crystal display can also display a range of graphic information, such as Chinese characters.
3) Classification based on lighting method LCD liquid crystal displays can be split into two categories: backlit and non-backlit.
LCDs without backlights rely on the reflective coating on the back of the panel to reflect incoming natural light from below. Most LCD-equipped devices use natural light as a light source and do not require backlighting. If the product is used in low-light or dark situations, select an LCD monitor with a backlight.
Touchscreen lamination is the process of applying a thin coating or layer to the surface of a touchscreen. This entails adding a protective coating of plastic or glass to the touchscreen. This layer protects the touchscreen against scratches, fingerprints, dust, dirt, and other environmental contaminants. It also improves the optical clarity of the touchscreen, making it easier to see images and text on the screen. Lamination can also be utilized to provide a decorative touch to the device by applying a logo or other graphic to the touchscreen.
This layer is commonly comprised of polyester or polycarbonate, and it is placed with heat and pressure. The layer is applied using a lamination machine, which provides heat and pressure to the touchscreen, allowing the protective layer to adhere to it. The heat softens the substance, and the pressure bonds it to the touchscreen. The lamination process usually takes a few minutes, depending on the size and complexity of the touchscreen. After the lamination process is completed, the touchscreen is cooled and the protective layer is kept in place to safeguard it from environmental toxins and damage.
Touchscreen lamination protects the touchscreen from damage and scratches while also improving its optical clarity and appearance. As it reduces glare and reflections from the touchscreen. Finally, lamination can be used to decorate the device by applying a logo or other graphic to the touchscreen.
Additionally, touchscreen lamination can be used to apply coatings such as anti-glare, anti-reflection, and anti-fingerprint coatings, which serve to reduce glare and reflections while also making the touchscreen simpler to clean. There are numerous tips for waterproofing throughout the laminating process.
