Ultra-thin mouse and trackball application design using optical sensors

A1: Ultra-thin mouse Sensor Can adapt to different shell designs, ultra-thin mouse is easy to carry and suitable for some people who use laptops.

Q2: What type of DSP chips are generally used for image processing?

A2: The sensor has a built-in DSP, which is a dedicated DSP system, different from the general-purpose DSP chips on the market.

Q3: Can optical mouse sensors be used in industrial environments?

A3: It cannot work at -40~85°C.

Q4: What is the central idea of ​​the ultra-thin mouse application design?

A4: It provides customers with more flexibility in product design without any restrictions on their ideas.

Q5: What is the sensitivity of the optical sensor?

A5: It depends on the resolution and report rate, which will be determined by the customer's design.

Q6: What is optical guidance technology?

A6: Optical guidance technology refers to the use of sensors to control constant current.

Q7: What are the pros and cons of optical sensors and capacitive touch sensors? What problems will occur when there is water on the trackball?

A7: Capacitive touch sensors are limited to only detecting fingers and are susceptible to static electricity. Optical sensors do not have this limitation. As for when there is water on the trackball, it depends on the degree of its impact on the spherical surface and it may not necessarily affect the function.

Q8: What are the advantages and limitations of trackball applications on mobile phones? What is the future development trend?

A8: The advantage is that it provides 2D input for mobile phones, but the limitation is that it still has a certain thickness (including the trackball). The development trend will be to replace the trackball with fingerprint detection or alternative surfaces.

Q9: Could you please introduce the product’s solution for acceleration measurement?

A9: The sensor detects the relative distance of movement and cannot detect acceleration.

Q10: What is the response speed of this sensor?

A10: It depends on the report rate of the MCU used, usually around 8ms.

Q11: What are the requirements of the optical sensor for the color of the desktop?

A11: For optical sensors, it is better for non-smooth surfaces, non-repeating patterns and non-directional patterns.

Q12: I think the design of a mouse should be based on ease of use and comfort. Although the ultra-thin mouse can reduce power consumption, are there any considerations for ease of use?

A12: You need to confirm that the Z-height is the optimal value and the LED brightness is appropriate.

Q13: Why did the serial interface use 2 wires (SCLK, SDIO) in the past, but now use 4 wires (SCLK, MISO, MOSI, NCS)?

A13: It is to increase the communication capability of SPI.

Q14: At addresses 03 and 04, the displacement values ​​in the X and Y directions can be read. What is the repeatability after the same distance is displaced?

A14: The sensor obtains relative displacement, not absolute displacement, so there is no specification for repeatability.