Distinct Functions of Probe Modules and Shrapnel Microneedle Modules in Cell Phone Screen Testing

Cell phone screens serve the primary purpose of displaying color images and hues, with the display and touch screen as integral components. Touch screens, categorized into resistive, capacitive, infrared, and surface acoustic wave types, find prevalent use in smartphones, with capacitive touch screens being the dominant choice. The operational principle of capacitive touch screens involves leveraging our body's current sensing to facilitate screen interaction. Despite the prevalent use of capacitive touch screens, instances of non-responsiveness do occur, prompting the need for troubleshooting.

In cases of malfunctioning cell phone screens, preliminary checks involve inspecting for water mist, oil, or other conductive substances on the screen, as well as assessing the use of non-original chargers or charging cables. If these factors are ruled out and the screen issues persist, considerations extend to potential water-induced wiring loosening, hardware damage, or problems arising from prior phone drops.

To ensure the quality and performance of cell phone screens before official shipment, rigorous performance tests are imperative. These tests encompass screen brightness, contrast, color gamut, reliability, longevity, and smoothness. An essential component in these tests is a module that facilitates connection and conduction. In cell phone screen testing, KDDI's high-current pogo pin module emerges as an excellent solution. However, distinctions exist between the pogo pin probe module and the Bladpin shrapnel microneedle module.

The high-current Bladpin microneedle module, characterized by a one-piece molded shrapnel structure, offers a thin and lightweight design with various head types for customization. In contrast, the probe module features a multi-component system structure composed of needle, needle tube, and needle tail, leading to a more complex production technology and process. The surface gold-plating thickness on the probe module is challenging to control.

The high-current elastic microneedle module exhibits robust capability in withstanding high-current transmission, with a rated current reaching up to 50A. Within the 1-50A range, current transmission remains stable. In comparison, the probe module has a rated current of only 1A, limiting its capacity for high-current tests, resulting in poor stability and susceptibility to needle breakage and insertion issues.

The high-current elastic microneedle module provides an effective solution for small pitch tests, accommodating pitches as small as 0.15mm with stable performance. Conversely, the probe module's competence is limited to pitch values between 0.3mm and 0.4mm, exhibiting poor life and stability in smaller pitch field tests.

The high-current shrapnel microneedle module boasts an impressive service life exceeding 20 million cycles, making it well-suited for high-frequency testing without the need for frequent replacements. On the other hand, the probe module's service life is around 5 million cycles, necessitating frequent replacements, thereby impacting testing efficiency and progress.

Considering structural aspects, current transmission, small pitch field testing, and service life, the pogo needle probe module is no longer the optimal choice for enterprises and suppliers. The high-current shrapnel microneedle module stands out by not only meeting cell phone screen testing requirements but also offering more stable performance and cost-effectiveness.

shrapnel structure microneedle module prober

66