Skip to main content

Synaptics Under-Display Fingerprint Scanner Reverse Engineering

SystemPlus Consulting publishes a reverse engineering report of Synaptics’ under-display fingerprint scanner found inside the VIVO X21 UD Smartphone:

"This scanner uses optical fingerprint technology that allows integration under the display. With a stainless steel support and two flexible printed circuit layers, the Synaptics fingerprint sensor’s dimensions are 6.46 mm x 9.09 mm, with an application specific integrated circuit (ASIC) driver in the flex module. This image sensor is also assembled with a glass substrate where filters are deposited.

The sensor has a resolution of 30,625 pixels, with a pixel density of 777ppi. The module’s light source is providing by the OLED display glasses. The fingerprint module uses a collimator layer corresponding to the layers directly deposited on the die sensor and composed of organic, metallic and silicon layers. This only allows light rays reflected at normal incidence to the collimator filter layer to pass through and reach the optical sensing elements. The sensor is connected by wire bonding to the flexible printed circuit and uses a CMOS process."

Sensor die
ASIC die
Optical filter deposition on glass substrate

Comments

Post a Comment

Popular posts from this blog

SMAMDA Festival Videographer

SMAMDA Fest Videographer 2016 #increiblesf2016 - Smamda Fest Videographer 2016. Mungkin banyak dari kalian sudah sering mendengar mengenai Smamda Fest. Apa sih Smamda Fest itu? kok banyak yang promosi tentang Smamda Fest? Pertanyaan-pertanyaan berikut akan saya bahas pada artikel ini. SMAMDA Festival adalah sebuah acara yang diadakan oleh SMA Muhammadiyah 2 Sidoarjo. Pada acara tersebut
Post a Comment
Read more

Assorted News

Science Magazine publishes a paper on wideband light sensing device " Ultrabroadband photosensitivity from visible to terahertz at room temperature " by Dong Wu, Yongchang Ma, Yingying Niu, Qiaomei Liu, Tao Dong, Sijie Zhang, Jiasen Niu, Huibin Zhou, Jian Wei, Yingxin Wang, Ziran Zhao, and Nanlin Wang from Peking University, Tianjin University of Technology, and Tsinghua University, China. " Charge density wave (CDW) is one of the most fundamental quantum phenomena in solids. Different from ordinary metals in which only single-particle excitations exist, CDW also has collective excitations and can carry electric current in a collective fashion. Manipulating this collective condensation for applications has long been a goal in the condensed matter and materials community. We show that the CDW system of 1T-TaS2 is highly sensitive to light directly from visible down to terahertz, with current responsivities on the order of ~1 AW−1 at room temperature. Our findings open a n...
Post a Comment
Read more

Samsung Expects 10% of Smartphones to Have Triple Camera Next Year

SeekingAlpha : Samsung reports an increase in image sensor sales in Q2 2018 and a strong forecast for both its own image sensor and also the image sensors manufactured at Samsung foundry. Regarding the triple camera trends, Samsung says: " First of all, regarding the triple camera, the triple camera offers various advantages, such as optical zoom or ultra-wide angle, also extreme low-light imaging. And that's why we're expecting more and more handsets to adopt triple cameras not only in 2018 but next year as well. But by next year, about 10% of handsets are expected to have triple cameras. And triple camera adoption will continue to grow even after that point. Given this market outlook, actually, we've already completed quite a wide range of sensor line-up that can support the key features, such as optical zoom, ultra-wide viewing angle, bokeh and video support so that we're able to supply image sensors upon demand by customers. At the same time, we will continue t...
Post a Comment
Read more