The December 2022 issue of IEEE Spectrum is here!

Close bar

Taser Cam Puts Policing in the Spotlight

Taser's new head-mounted camera for police officers offers both promise and peril

2 min read
Taser Cam Puts Policing in the Spotlight

Taser has gone beyond stun guns by betting its future on a head-mounted camera worn by police officers. The 3.2-inch camera aims to help police departments reduce the use of force and defend against lawsuits regarding police brutality—as long as they can figure out camera-use guidelines that maximize oversight of police behavior while minimizing police surveillance.

The new Axon Flex camera can clip onto a police officer's baseball cap or sunglasses and operate continuously for up to 12 hours, according to a feature article by The Verge that coincided with the camera's official debut on 5 April. But the camera only begins active audio-and-video recording when the officer presses a small button on the control unit. The captured footage includes 30 seconds of video (without audio) from before the button is pressed. 

Any recordings get uploaded to a website called when the officer plugs his Axon Flex control unit into a docking base. That allows officers and administrators (high-ranking officers) to label and edit video files, even as the system records the user's login information and tracks the time he or she worked on the file. Video recordings stay in the system for only 180 days before being erased, unless they are used as evidence.

Such cameras could pay off for police departments by providing huge cost savings when defending against lawsuits, said Scott Greenwood, a national civil rights lawyer based in Cincinnati, Ohio, in an interview with The Verge. On the other hand, Greenwood envisioned a new world where judges would only consider police officer testimony when the officers could provide video to back up charges against defendants.

The new Axon Flex camera helped the Rialto Police Department in California dramatically reduce the number of "use-of-force incidents" and complaints during a yearlong trial that began on 13 Feb. 2012, according to a new study touted by Taser International. Chief Tony Farrar of the Rialto Police Department conducted the study as part of his graduate degree thesis at Cambridge University in the UK.

But turning every police officer into a walking version of the show "Cops" also comes with privacy risks and possible abuses of power. Greenwood emphasized that police departments must set up guidelines that let officers know when they should or should not use the cameras. For instance, police officers might be instructed to always turn the camera on when responding to certain scenarios, but would otherwise leave the cameras off to avoid extending police surveillance to ordinary citizens in normal circumstances.

Taser's venture into the new world of policing comes at a time when its fortunes have continued to rise and fall based on the controversy surrounding its flagship stun gun product. The stun gun's huge success in lowering the number of lethal confrontations between police officers and suspects has been marred by safety concerns surrounding a string of deaths and alleged cases of police brutality over the past years. If Taser's Axon Flex camera can encourage better policing and discourage abuse of both non-lethal and lethal force, everyone might end up feeling safer in the end.

Images: Taser International

The Conversation (0)

Digging Into the New QD-OLED TVs

Formerly rival technologies have come together in Samsung displays

5 min read
Television screen displaying closeup of crystals

Sony's A95K televisions incorporate Samsung's new QD-OLED display technology.

Televisions and computer monitors with QD-OLED displays are now on store shelves. The image quality is—as expected—impressive, with amazing black levels, wide viewing angles, a broad color gamut, and high brightness. The products include:

All these products use display panels manufactured by Samsung but have their own unique display assembly, operating system, and electronics.

I took apart a 55-inch Samsung S95B to learn just how these new displays are put together (destroying it in the process). I found an extremely thin OLED backplane that generates blue light with an equally thin QD color-converting structure that completes the optical stack. I used a UV light source, a microscope, and a spectrometer to learn a lot about how these displays work.

Keep Reading ↓Show less