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LCD Controller for 3G Phones

2nd September, 2004

Europe : Sharp announced the development of a LCD controller using the high-speed serial interface MDDI , the LCD LR38869 for CDMA2000 and WCDMA (UMTS) 3G cellular phones.

Sample shipment will begin in late September 2004. With integrated MDDI technology, the number of signals across the device’s hinge is significantly reduced, and the development of sophisticated designs, such as a rotation type display, is promoted.

The integration of MDDI allows reduced power consumption, enabling the adoption of advanced features, such as high definition (QVGA) LCDs and high pixel cameras (1M-3M pixel) for wireless devices. Furthermore, global adoption of multimedia functions, such as video streaming, is increasing and technology that can transmit mass data with high speed and low power consumption is required for further advancement.

MDDI, developed by QUALCOMM, is integrated into select QUALCOMM's Mobile Station Modem™ (MSM™) baseband chipsets for CDMA2000 and WCDMA (UMTS), starting with the MSM6150™ and MSM6550™ chipsets for CDMA2000 and the MSM6275™ and MSM6280™ chipsets for WCDMA (UMTS). The LR38869 LCD controller supports the MDDI standard, and ensures high speed and mass data transfer between the LCD panel and the MSM chipset. Moreover, the number of signals of a hinge part is exceedingly reduced from conventional 21 to four. Advanced handset models, including rotation-type displays, which have excellent functionality and design, can also be developed. Furthermore, MDDI provides reduced power consumption and decreased EMI noise (unnecessary radiation) by differential serial-data transmission of low amplitude.

Model name
LR38869
Sample price 1,890 yen (1,800 yen before tax)
Sample availability End of September 2004
Monthly production 1 million units

Main Features of the Sharp LCD Controller LR38869

1. A LCD controller corresponding to a high-speed serial interface MDDI standard (TYPE I)
1) Realize the high speed and mass data transfer of a maximum 400 Mbps(es) between the LCD panel and either the MSM6150 chipset, the MSM6550 chipset, the MSM6275 chipset or the MSM6280 chipset.
2) The number of signals through a hinge part can be significantly reduced, and the development of sophisticated designs, such as rotation type display, is promoted
3) Contribute to reduction in power consumption, and decreasing EMI noise by differential serial-data transmission of low amplitude.

2. Mitigate load of Baseband IC by built-in of graphic processing function.

*1 MDDI (Mobile Display Digital Interface): The serial interface standard developed by QUALCOMM. With MDDI the high-speed data transfer between a host and a client is realized by the small number (4) of signals, with low power consumption. VESA (Video Electronics Standards Association) supports this standard.

Features

1. A LCD Controller corresponding to High-speed Serial Interface MDDI Standard (TYPE I)
This device supports the MDDI (Mobile Display Digital Interface) standard developed by QUALCOMM and can inter-communicate with QUALCOMM’s chipset solutions, including the MSM6150, the MSM6550, the MSM6275 and the MSM6280 chipsets. In addition, finishing the verification on the MSM6550 surfboard and development of a driver software, it contributes to shortening of a handset manufacturer's design period, and reduction of a development resource.
Moreover, it is possible to control two screens; QVGA size main display and sub display to maximum QVGA size by this device. 1) Realize the high speed and mass data transfer of a maximum 400 Mbps between Baseband IC and a LCD panel.
By the high speed and mass data transfer of a maximum of 400 Mbps, you can enjoy play back movies and mass contents with a cellular phone.
2) The number of signals of a hinge part can be reduced sharply, and promote the model development which is excellent in functionality / design nature.
In a cellular phone, the number of signal wiring between Baseband IC and each module is increasing with progress of advanced features, such as high definition (QVGA) LCDs, and high pixel (1M-3MP) cameras.
On the other hand, the structure of mechanical body, such as a spread of a clamshell type phone and an appearance of a cellular phone which carried the camera in the hinge part, had been complicated, and restrictions of wiring in a hinge part had become the neck of advanced features especially.
This time, the number of signals of a hinge part is exceedingly reduced from conventional 21 to 4, and model development which is excellent in functionality / design nature, such as a rotation type display, can be realized.
3) Contribute to reduction in power consumption, and decreasing EMI noise by differential serial-data transmission of low amplitude.
In order to perform differential serial-data transmission with low amplitude, it contributes to reduction in power consumption, and decreasing EMI noise (unnecessary radiation).

2. Mitigate load of Baseband IC by built-in of graphic processing function
The graphic processing function in which camera image data / LCD data conversion, expansion/rotation, etc. were carried in the conventional LCD controller for cellular phones is built in, and the load of Baseband IC is mitigated. This realizes smooth display and low power consumption.

System Configuration

Specifications Part number
LR38869
Power supply voltage Internal Core: 1.65 to 1.95V
Host (I/O): 1.65 to 3.6V
LCD (I/O): 2.6 to 3.3V
Bandwidth 400 Mbps (max.)
Number of signal lines*1 Four (two data lines, two sync signal lines)
Command specification VESA*2 compliant
Power consumption 7mW (typ.)
Package 9mm X 9mm 176-pin FBGA (CSP)

*1 Total of seven lines when including two power supply lines and one reset line.
*2 Video Electronics Standards Association

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