Instrument Cluster and Head-up Display (HUD)
The evolution of automobiles is spurring the need for an instrument panel capable of displaying new kinds of information such as the amount of regenerative energy generated by 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.
High-End Instrument Panel
Shown below is a fully digital instrument panel that uses computer graphics to present all information such as a speedometer on a TFT LCD panel as large as DVGA. Use of computer graphics helps realize a flexible instrument panel that displays information only when necessary or uses different colors during daytime and nighttime.
High image rendering performance is required to display the rotating meter needles smoothly.
In addition, it is necessary to make provisions for using an HUD and a standard instrument panel simultaneously.
The TMPA970C20 and TX4966XBG-280 provide two graphic display controllers (GDCs), thereby making it possible to connect two TFT LCD panels. In addition to a 2D graphics accelerator, they contain a 3D graphics accelerator ideal for high-resolution digital instrument panel applications.
Fully-digital Instrument Panel System Demo Video
This video clip introduces you fully-digital instrument panel system uses computer graphics replacing mechanical pointers and bulbs.
Block Diagram of a High-End Instrument Panel
Products Recommended for High-End Instrument Panel Applications
| Part Number | Operating Frequency [MHz] | Embedded DRAM (eDRAM) | External DRAM | Graphics Accelerator | GDC | Frame Grabber | Package |
|---|---|---|---|---|---|---|---|
| TX4961XBG-240 | 240 | - | DDR-I | 2D | 1 ch | 1 ch | PBGA456 |
| TX4966XBG-280 | 280 | 8 MBytes | SDRAM | 2D/3D | 2 ch | 2 ch | PBGA456 |
| TMPA970C20XBG | 336 | 2 MBytes | DDR2 | 2D/3D | 2 ch | 2 ch | PBGA516 |
| Part Number | Package | Features & Functions | Operating Temperature | Supply Voltage |
|---|---|---|---|---|
| TC90105FG | LQFP80-P-1212-0.5F | 2-channel video decoder; 2-channel AD converter; Newly developed HV & diagonal enhancer; Dynamic YC gamma correction; Color management; Horizontal aberration correction; 2.5-V regulator | -40℃ to +85℃ | 1.4 V to 1.6 V 3.0 V to 3.6 V |
| TC90107FG | LQFP64-P-1010-0.5E | 1-channel video decoder; 4-channel video input selector; Newly developed HV & diagonal enhancer; Dynamic YC gamma correction; Color management; Horizontal aberration correction; 2.5-V regulator |
| Part Number | Function |
|---|---|
| TC74LCX574FT, TC74LCX16374FT | Address Latch |
| TC74LCX244FT, TC74LCX16245FT | Data Buffer |
Low-End to Mid-Range Instrument Panels
Illustrated below is an instrument panel that consists of a WQVGA to WVGA TFT LCD panel and mechanical meters. In order to present various information, it is necessary to connect the instrument panel 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. The TX4961XBG-240 and TX4964FG-120 provide not only a 2D graphics accelerator and a display controller but also all the functions needed to realize such an instrument panel, including a CAN controller, an I2C interface and timers.
Block Diagram of Low-End to Mid-Range Instrument Panels
Products Recommended for Low-End to Mid-Range Instrument Panels Applications
| Part Number | Operating Frequency [MHz] | Embedded DRAM (eDRAM) | External DRAM | Graphics Accelerator | GDC | Frame Grabber | Package |
|---|---|---|---|---|---|---|---|
| TX4961XBG-240 | 240 | - | DDR-I | 2D | 1 ch | 1 ch | PBGA456 |
| TX4964FG-120 | 120 | 4 MByte | - | 2D | 1 ch | 1 ch | LQFP176 |
| Part Number | Package | Features & Functions | Operating Temperature | Supply Voltage |
|---|---|---|---|---|
| TC90105FG | LQFP80-P-1212-0.5F | 2-channel video decoder; 2-channel AD converter; Newly developed HV & diagonal enhancer; Dynamic YC gamma correction; Color management; Horizontal aberration correction; 2.5-V regulator | -40℃ to +85℃ | 1.4 V to 1.6 V 3.0 V to 3.6 V |
| TC90107FG | LQFP64-P-1010-0.5E | 1-channel video decoder; 4-channel video input selector; Newly developed HV & diagonal enhancer; Dynamic YC gamma correction; Color management; Horizontal aberration correction; 2.5-V regulator |
| Part Number | Function |
|---|---|
| TC74LCX574FT | Address Latch |
| TC74LCX16245FT | Data Buffer |
Product Introduction
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* System and product names mentioned herein may be trademarks or registered trademarks of respective companies or organizations.