ROHM, a Japanese semiconductor supplier, foray into the Indian "e-Cluster for Two-wheeler Bikes" market, with the TFT Panel-Chipset Solutions, that introduces an industry's first functional safety support.

package

New Delhi, March 22th, 23rd 2018: ROHM, brings safety function to Next-generation Automotive in India with "Panel-Chipset solution", widely used in electronic-Cluster/meters that are implemented at a faster pace.

ROHM is providing energy efficient power and safety solutions for automobile and has recently developed a chipset designed to drive and control automotive LCDs, including larger high-resolution monitors used for navigation and the instrument cluster. ROHM's revenues from this Panel-chipset solution is projected to hit US$100 million by 2021, with a CAGR of 13% with present US$60 million.

"The automotive industry in India is one of the prime drivers of the Indian economy. This industry's R&D is an integral part of enabling manufacturing and innovations in India. ROHM introduces the latest technology in Panel-Safety which had huge market success in Europe and Japan. ROHM is convinced that this new automotive Panel-Chipset is necessary for the Indian market as it will enhance both safety and comfort." said Daisuke Nakamura, Managing Director, ROHM Semiconductor India.

"ROHM Semiconductor India is working towards enabling innovations in the Indian two-wheeler market. We are now working with key Indian two-wheeler OEM and Tier1, to customize this solution for the Indian market. A fully functional digital LCD panel can display much more useful information than the mechanical and semi-digital panels. We are working very closely with both conventional OEM's and for e-bikes to define the application in India." said Britto Edward Victor, Head, Design Center, ROHM Semiconductor India.

package

With the advent of the Smartphone, LCD panels are now the de facto user-interface. This fundamental innovation has brought some major advantages and the users are accustomed to using this interface.

And, in recent years the adoption of LCDs in vehicles for the instrument cluster/meter, navigation, electronic-mirrors, and other systems have risen significantly, while the growing number of applications has increased the demand for larger and higher resolution displays.

Unlike consumer-displays which may sometimes freeze, automotive-panel displays vital information to the driver relating to vehicle parameters (Speed, Engine-conditions, Turn-indicators, etc.,), and images from cameras (rear-camera, side-mirror cameras, etc.,) whose malfunction leads directly to human-safety on the roads.

To achieve these high-safety needs, it is necessary to increase the number of LCD-driver and controller channels. However, this makes system configuration and verification complex, strengthening the demand for an integrated Panel chipset solution. In addition to this, applications like electronic-mirrors where malfunctions can lead to serious accidents functional safety are required.

package

ROHM's new Panel chipset integrate a gamma correction IC, timing controller (T-CON), source driver, and gate driver for driving HD/FHD class displays (the highest resolution currently on the market), along with a power management IC (PMIC) to ensure optimum operation. Each IC is designed to share information as needed, for the supporting functional safety in devices of displays. This chipset ensures high reliability for LCD monitors used for side mirrors and speedometers.

In addition, chipset optimization allowed ROHM to cover a wide range of specifications while at the same time integrate a key Fail detection function in the timing controller to verify operation, making it possible to configure high-resolution LCD panels.

<Key Features of automotive Panel-Chipset>

1. The world's first automotive chipsets that support functional safety in LCDs

Each IC configured in the chipset integrates a function for detecting the expected failure mode. As a result, it is possible to detect panel failure and confirm and provide feedback on information such as input signals to the LCD as well as peeling/destruction of the LCD driver. Supporting functional safety contributes to the prevention of serious accidents caused by the malfunction of monitors for the speedometer, side mirrors, and other systems.

For example, the driver may not notice that the screen for the side mirrors has frozen in the case no object is detected at the time, presenting a danger that can lead to serious injury if someone suddenly were to go behind the car while the car is moving. To prevent this ROHM delivers functional safety that can detect if the screen is frozen.

Examples of LCD Failure Detection by Chipset Functional Safety
LCD Failure Modes Black Screen Freeze/Burn-In Display Delay
Abnormality Occurrence Location package package package
Expected IC Error Based on Abnormality Occurrence PMIC 1) Shutdown - -
T-CON 2) LVDS signal error
3) Internal register fault
7) LVDS signal error -
Source Driver 4) Input voltage error
←PMIC detected
5) No input signal
←T-CON detected
6) Fixed output Low
8) Indeterminate input signal -
Gate Driver - 9) Input signal error
←T-CON detected
10) Input voltage error
←PMIC detected

2. Easily configure HD/FHD class high-resolution LCDs

ROHM chipsets are designed to cover a wide range of specifications, making it possible to easily configure high-resolution HD/FHD class LCDs.

In addition, the timing controller is equipped with a Fail detection circuit for verifying chipset operation. And the setting of each output in the power management IC can be changed by simply rewriting the internal register value. This reduces development resources while contributing to common board designs.

Expanded Chipset Lineup Supports a Wide Range of Resolutions
Part No. Functions HD 720
(1280 x 720)
FHD Class
(1920 x 720)
FHD 1080
(1920 x 1080)
3K Class
(2880 x 1080)
Part No. Qty Part No. Qty Part No. Qty Part No. Qty
Timing Controller LCD driver control BU90AL211 1 BU90AL211 1 BU90AL210 1 BU90AL210 1
Source Driver LCD drive ML9882 (1440ch) 3 ML9882 (1440ch) 4 ML9882 (1440ch) 4 ML9882 (1440ch) 6
Gate Driver LCD drive ML9873 (960ch) 1 ML9873 (960ch) 1 ML9872 (540ch) 2 ML9872 (540ch) 2
PMIC Multifunction power supply IC BM81810MUV 1 BM81810MUV 1 BM81810MUV 1 BM81810MUV 1
Gamma Correction IC Image correction BD81849MUV 1 BD81849MUV 1 BD81849MUV 1 BD81849MUV 1

<Terminology>

HD / FHD (High Definition / Full High Definition):
Both HD and FHD refer to video resolution. HD is 1280 × 720 pixels, while FHD is equivalent to 1920 × 1080 pixels.

Resolution Equivalent Panel Size
WVGA 800 x 480 7-8 in and smaller
HD 1280 x 720 (800) 7-8 in and smaller
FHD 1920 x 1080 (1200) 7-8 to 10 in and larger
WQXGA 2880 x 1280
2560 x 1600
10 in and larger

Functional Safety:
Functional safety includes safety measures (concepts for ensuring safety) that minimize risk by adding functionality such as monitoring and protective equipment. In the automotive market, functional safety minimizes risk to an acceptable level in order to prevent bodily injury in the event of malfunction due electronic system failure. There is even an international standard for automotive functional safety (ISO26262). Meanwhile, protection functions frequently referred to in ICs are functions that ensure the safety of the IC itself by monitoring for internal malfunctions and damage.