Product Description
-The 15.6 inch usb capacitive touch panel is a 10-point capacitive touch screen equipped with HD 1928*1080 lcd display which is available to show the picture or video clearly with the comfortable and wonderful using experience.
-The 15.6 inch usb capacitive touch panel is a capacitive multi-touch screen that can handle 10 touch points simultaneously. This provides extremely accurate operation supporting many different gestures, including swiping, zooming and more. -The 15.6 inch usb capacitive touch panel can works well with all kinds of operating systems including Linux, Windows, Android, Ubuntu, and IOS. -Manufactured with strict requirements, the 15.6 inch usb capacitive touch panel has superior quality and fine workmanship.
| Model Number | HX1561803 |
| Brand | Grahowlet |
| Size | 15.6 inch |
| Interface Type | IIC/USB |
| Structure | G+G |
| Controller IC | ILITEK |
| Touch Points | 10 points |
| Transparency | ≥85% |
| Surface Hardness | ≥6H |
| Operating Environment | -20℃ ～ 70℃,≤85% RH |
| Storage Environment | -30℃ ～ 80℃,≤85% RH |
| Power Supply Voltage | 5.0 V |
| Outline Dimension | 389.00(W)x237.00(H)x1.60(D) mm |
| Viewing Area | 345.16(W)x194.00(H) mm |
| Support Systems | Windows/Android/Linux etc. |
| Warranty | 1 year |
Technical Q&A
Q: What is the principle of capacitive touch screen to achieve multi-touch?
A: When the finger touches the capacitive screen, it affects the coupling between the two electrodes near the touch point, thus changing the capacitance between the two electrodes. When detecting the mutual capacitance, the lateral electrodes sequentially emit excitation pulse signals, and all the longitudinal electrodes receive signals at the same time, so that the capacitance values of all the intersections of the lateral and longitudinal electrodes can be obtained, that is, the capacitance of the two-dimensional plane of the entire touch screen. According to the two-dimensional capacitance change data of the touch screen, the coordinates of each touch point can be calculated. That is, the real multi-point coordinates can be calculated to realize multi-touch;
Q: About the capacitive screen we are using now, the power supply interference problem is very serious. What should we do to eliminate the interference of the power supply? Apart from scanning frequency to avoid the noise frequency of the power supply, improve the signal-to-noise ratio of the screen? Is there any other way?
A: Seeing from all current cases, power supply interference is mainly concentrated in large-size TP (7inch or above), and we have the following solutions: (1) Choose a quality power supply. This is very important and the most effective and fundamental way to solve power disturbances; (2) Frequency hopping. Use the spectrum analyzer to find the area where the common mode interference strength of the adapter is small, and then set the TX scan frequency to this area through software setting, which can effectively control the interference. If there is interference in the full frequency band, it is recommended to abandon the adapter; (3) Improve the signal to noise ratio. In the initial design of TP (7.0inch or above), consider using the low-impedance surface-rent material for the RX signal channel and using the design of the double-sided trace. Try to control all the channel resistances within 10K, which can effectively control the power supply interference. ; (4) It is also possible to change the charger, increase the algorithm filtering, and adopt Cypress, EETI, ILI schemes with strong anti-interference performance.
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