电阻式触摸屏的定制化方案
Advantages of resistive touchscreens.
- Resistive touchscreens are highly accurate down to the pixel dot level and are suitable for resolutions up to 4096x4096.
- The screen is unaffected by dust, moisture and oil and can be used in low or high temperature environments.
- Resistive touch screens use pressure sensing, can be touched with any object, can be used with gloves and can be used for handwriting recognition.
- Resistive touchscreens are also less expensive due to the more mature technology.
Resistance touch Panel (RTP)
Disadvantages of resistive touchscreens.
- Resistive touch screens can usually only achieve single point touch. If designed for multi-touch, when two points are pressed at the same time, the pressure on the screen becomes unbalanced, resulting in touch errors and making it harder to achieve multi-touch.
- Resistive touch screens are more susceptible to damage from scratches and other causes that affect the touch function and appearance of the screen.
4-wire resistive touch modules
4-wire RTP: It has a relative cost advantage. It has an Indium Tin Oxide (ITO) resistive coating on the inside of the touch layer to form the X and Y axes. As soon as pressure is applied, the voltage changes and the coordinates of the X and Y axes are calculated using a voltage divider.
A disadvantage of the 4-wire RTP is that certain factors can degrade the linearity and accuracy of this axis, including external environmental conditions and high frequency operation. Occasional recalibration may be required to maintain the accuracy of the touch points. Also, as the top layer material is a thin film, scratches and nail marks on the exterior will become more visible after extended use.
4-wire / 5wire RTP schematic difference
5-wire resistive touch modules
The structure and design philosophy of a 5-wire RTP is similar to that of a 4-wire RTP. In a 5-wire resistive touch screen, only the bottom layer is used to generate the X and Y axis coordinates, which we call the resistive layer. The top layer is used as a purely conductive layer, usually made from a nickel-gold plated material for better durability. As the top layer is not used for one of the axes, this results in excellent stability, durability, sensitivity and reliability.
Some advantages of the 5-wire RTP are that a constant level of accuracy is maintained even if the top layer is damaged, and that the tactile response and accuracy are not affected by harsh environmental conditions. However, it is obviously more expensive and more difficult to manufacture.
4-wire / 5wire RTP schematic difference
G+G Resistive Touch Modules
G+G resistive touch modules are the perfect solution to the problem of using RTP in harsh environments where corrosive solvents and liquids can damage the ITO film itself. Of course, it is a more complex process and we have experience with small quantities.
RTP with G+G structure
A G+G RTP from Disea
Customized RTP:
- Not all resistive screens are the same size as LCM, you can customize the resistive screen which is bigger than LCM, you can stick it on your housing;
- You can also customize logo and silkscreen on the surface of RTP;
- You can even use reinforced glass to enhance the IK grade;
Lager than LCM Resistive Touch Screen
Resistive Touch Screen with screen silk
RTP with reinforced glass
About Bonding:
RTP is Air bonding in most cases, use double sided tape to go for bonding, there are some L shaped or one whole frame.
L-shape tape: it costs less, we will make Z-shape at the seam of two tapes, it can be better dustproof, but can't prevent water vapor, not recommended for special applications.
Frame-type tape: it costs more, the entire adhesive tape is sealed, it can prevent dust and water vapor.
Of course, we also have OCR optical bonding, which have more higher transmittance rate, better reliability, better dustproof and waterproof , of course, it is very expensive.
L-sharp type D.S.T.
Frame-type D.S.T.
OCR optical bonding
*The above pictures are real cases of our customized products for customers, in order to protect the product and customer safety, we only intercept the partial display, please understand.
Disea can customize a 4wire/5wire resistive touch screen for you, as well as a special G+G structure RTP，and silk printing , reinforced tempered glass, and has a variety of bonding methods. If you have better ideas, please contact us.