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Instrument Clusters and Head-up Displays (HUDs)

The evolution of automobiles is spurring the need for an instrument cluster capable of displaying various information such as the amount of regenerative energy in hybrid electric vehicles (HEVs) or presenting driving information on a head-up display (HUD).
Using a graphic display provides greater design flexibility since it can dynamically change the displayed information according to situations.

Full-TFT Instrument Cluster

Shown below is a fully digital instrument cluster that uses computer graphics to present all information such as a speedometer on a TFT LCD panel as large as UWVGA (1024×480) or DVGA (1280×480). In order to present various vehicle information, the instrument cluster is connected to an in-vehicle LAN via a CAN bus. Use of computer graphics helps realize a flexible instrument cluster that displays information only when necessary or uses different colors during daytime and nighttime.
The Capricorn™-F TX4966XBG and Capricorn™-Bt/C TMPR46 Series can provide one or two graphic display controllers (GDCs), thereby making it possible to connect up to two TFT LCD panels. The TMPR46 Series incorporates a 2D graphics engine, and the TX4966XBG contains a 3D graphics engine. These graphics engines provide high image rendering performance necessary to smoothly display the rotating pointers. Both the TMPR46 Series and the TX4966XBG have video inputs to display images from external video sources such as cameras and a car navigation system.

This is the block diagram of a Full-TFT instrument cluster.

*1: CPU core
   Capricorn™-F : TX49/L4
   Capricorn™-Bt : ARM® Cortex®-R4
*2: Quad SPI is available only with the TMPR46 Series.
*3: The display resolution is limited when both a full-TFT instrument cluster and an HUD are used simultaneously. For detailed product specifications, contact your local Toshiba sales representative.

Full-TFT instrument cluster system block diagram

Products Recommended for Full-TFT Instrument Cluster Applications

Automotive Display Controllers Capricorn™
Part Number Camera / Video Inputs Display Outputs CPU Core Main Features Package
TX4966XBG-280 2 ch 2 ch TX49/L4 3D/2D graphics, CAN, MediaLB®, On-chip memory

PBGA456

TMPR461XBG-300 1 ch 2 ch ARM Cortex-R4 2D graphics, AD converters, CAN, MediaLB®, On-chip memory, Stepper motor controllers PBGA328
TMPR460XBG-300 1 ch 2D graphics, AD converters, CAN, On-chip memory, Stepper motor controllers PBGA244
Video Decoder ICs (Automotive Display Processors)
Part Number Features & Functions Operating Temperature Supply Voltage Package
TC90105FG 2 ch video decoders, 2.5 V voltage regulator, newly developed HVD enhancer, color management function, dynamic YC gamma correction, horizontal aberration correction, ITUR-656 output –40 to+85°C 1.4 to 1.6 V
2.3 to 2.7 V
3.0 to 3.6 V
LQFP80
TC90107FG 1 ch video decoder, 2.5 V voltage regulator, newly developed HVD enhancer, dynamic YC gamma correction, horizontal aberration correction, ITUR-656 output LQFP64

Hybrid Instrument Cluster

Illustrated below is an instrument cluster that consists of a WQVGA (400×240) to WVGA (800×480) TFT LCD panel and mechanical meters. In order to present various information, it is necessary to connect the instrument cluster to an in-vehicle LAN via a CAN bus. In addition, video inputs are required to display images from external video sources such as cameras and a car navigation system. In recent years, the head-up displays (HUD) has been receiving a lot of attention as a driver assistance system since it allows drivers to view necessary information without looking aside. The Capricorn-Bt/C TMPR46 Series incorporates a stepping motor controller and thus can directly drive mechanical meters. The Capricorn-Bt/C TMPR46 Series also provides a two-channel graphics display controller (GDC)*, which makes it possible to display different content on the instrument cluster and the HUD simultaneously. Moreover, the integrated graphics engine is capable of correcting images projected onto the curved combiner in the event of distortion (warping).

* Single-channel GDC for the TMPR460XBG-300

This is the system block diagram of Analog/Hybrid Instrument Cluster.

Hybrid instrument cluster system block diagram

Products Recommended for Analog/Hybrid Instrument Cluster Applications

Automotive Display Controllers Capricorn
Part Number Camera / Video Inputs Display Outputs CPU Core Main Features Package
TMPR461XBG-300 1 ch 2 ch ARM Cortex-R4 2D graphics, AD converters, CAN, MediaLB®, On-chip memory, Stepper motor controllers PBGA328
TMPR460XBG-300 1 ch 2D graphics, AD converters, CAN, On-chip memory, Stepper motor controllers PBGA244
Video Decoder ICs / Video Processors (Automotive Display Processors)
Part Number Features & Functions Operating Temperature Supply Voltage Package
TC90105FG 2 ch video decoders, 2.5 V voltage regulator, newly developed HVD enhancer, color management function, dynamic YC gamma correction, horizontal aberration correction, ITUR-656 output –40 to+85°C 1.4 to 1.6 V
2.3 to 2.7 V
3.0 to 3.6 V
LQFP80
TC90107FG 1 ch video decoder, 2.5 V voltage regulator, newly developed HVD enhancer, dynamic YC gamma correction, horizontal aberration correction, ITUR-656 output LQFP64
TC90193ASBG Quick display function for rear camera video signal, newly developed HVD enhancer, color management, dynamic YC gamma correction, horizontal trapezoidal correction, T-CON, muteless input switch, 1 ch video decoder FBGA228

* Capricorn is a registered trademark of Toshiba Corporation.

* ARM and Cortex are registered trademarks of ARM Limited (or its subsidiaries) in the EU and/or elsewhere.

* MediaLB is a registered trademark of Microchip Technology Inc. in the United States and other countries.

* System and product names mentioned herein may be trademarks or registered trademarks of respective companies or organizations.

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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.