Rælclear

Changing the norms of communication

The transparent interface Rælclear is a device that connects all forms of human-to-human communication.

01 Enjoy communicating while observing facial expressions

The transparent interface Rælclear is placed between you and the person you are facing, and a transcription system is used. When you speak to the person facing you, the voice input from the microphone to the PC, tablet, or smartphone is converted into text, which is displayed on Rælclear, the second monitor. Because Rælclear has high transparency and can be viewed from both sides, one can read the text-converted conversation content while looking at the expression and gestures of the person speaking, which improves the listener's understanding. This is highly valued as a communication aid not only for the deaf, hard of hearing, and those with APD/LiD, but also for the elderly.

02 Facilitating communication between different languages

By using the translation function of the transcription system, it can also be useful for communication between people with different native languages. As global communication expands, it can be a great help in cross-language communication.

03 Supporting more understandable information presentation and space design

The high transparency of Rælclear is also expected to be applied to AR-like uses. By placing Rælclear between not only people but also objects and landscapes and displaying information and effect images associated with them, it will possible to create a production aimed at increasing value.

Rælclear’s name was born from its unique two-way transparency: starting from the letter “c”, Rælclear reads as “clear” in both directions. With the world’s highest transparency and two-way viewability, Rælclear enables brand-new display applications.

Rælclear Principles and Techniques

Rælclear Specifications

	RælclearⅠ (12.3”)	Rælclear II (20.8”)
Resolution	1,440 x 540	1,280 x 720
Diagonal size	12.3”	20.8”
Display area size	Horizontal：291.6 mm Vertical：109.35 mm	Horizontal：460.8mm Vertical：259.2mm
Pixel density	125ppi	71ppi
Color representation method	Field-sequential color drive	Field-sequential color drive
Transparency（when display off）	84%	80%
Center brightness	150cd/m2	300cd/m2
Contrast ratio	25:1	30:1
Color depth	Approx. 16.77 million colors (by error diffusion)	Approx. 16.77 million colors (by error diffusion)
Display frequency (LCD refresh rate)	60Hz (180Hz)	120Hz (360Hz)
Video input	HDMI	HDMI，（USB-C(DP Alt Mode)）
Power supply	USB-PD/45W（or more）	USB-PD/100W
Other function	Brightness adjustment（2 steps） Horizontal image inversion	Brightness adjustment（５steps）， Color inversion Horizontal image inversion， Vertical image inversion

Transcription system software, PC, tablet, etc., must be prepared separately by the customer.Please use it after fully understanding the terms of use.

Devices to be connected (Please use the latest OS version of the device.)
OS：Windows、Mac
Smart Phone、Tablet： iPhone、 iPad （Not compatible with Android）

Please click here to download the user's manual.

Please click here to download the product brochure.

*1Rælclear’s “a” uses a phonetic symbol instead of “a” and “e”. Ralclear is a trademark of Japan Display Inc.

*2To solve the issues, the research group led by Associate Professor Yoichi Ochiai, Digital Nature Laboratory at the University of Tsukuba, and JDI jointly developed “See-Through Captions”.
See-Through Captions Project page
Kenta Yamamoto, Ippei Suzuki, Akihisa Shitara, and Yoichi Ochiai. 2021. See-Through Captions: Real-Time Captioning on Transparent Display for Deaf and Hard-of-Hearing People.
In The 23rd International ACM SIGACCESS Conference on Computers and Accessibility(ASSETS ’21).
https://assets21.sigaccess.org/accepted_posters.html

*3Transcription system software, PC, tablet, etc., must be prepared separately by the customer.Please use it after fully understanding the terms of use.

*4Devices to be connected (Please use the latest OS version of the device.)
PC: Windows, Mac
Smart Phone, Tablet : iPhone, iPad (Not compatible with Android)

Activities

Dec 22, 2025

Rælclear Featured as a Universal Communication Solution at TOKYO 2025 DEAFLYMPICS and Showcased at MiruTech.

In alignment with the 25th Summer Deaflympics Tokyo 2025, held from November 15 to 26, MiruTech took place at the National Olympics Memorial Youth Center. The event showcased innovative digital technologies aimed at fostering connections among people, regardless of nationality or ability. JDI presented its transparent interface, Rælclear, at the event.

When paired with software, Rælclear is designed to be placed between two people, displaying real-time transcriptions or translated text from speech. This creates a new communication experience, allowing users to follow conversations while still seeing facial expressions and gestures through the transparent interface. The event attracted not only deaf athletes but also numerous members of the press and visitors, generating strong interest and positive feedback. Through this innovative solution, JDI proudly supports the DEAFLYMPICS’ vision of fostering an inclusive society.

1．Rælclear installed across Competition Venues at TOKYO 2025 DEAFLYMPICS

During the tournament, approximately 100 Rælclear units were installed across competition venues and Deaflympics Square, helping realize universal communication.

2．Showcased at MiruTech and Interlocution to Universal Communication Technology

Rælclear was showcased at MiruTech, where numerous visitors had the opportunity to experience its cutting-edge capabilities firsthand. Furthermore, it was featured as part of Tokyo’s pioneering initiatives in universal communication technologies.

Jul 1, 2022

Donation to the Embassy of Ukraine in Support of Ukrainian Refugees

As part of support for Ukrainian refugees, we have donated a transparent display called Rælclear, which can be used as a bidirectional translation monitor, to the Embassy of Ukraine in Japan (Minato-ku, Tokyo), in collaboration with Ichigo Asset Management, Ltd.