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2M-Pixel CMOS Camera Module with Autofocus Function for Mobile Equipment
MCB770
Based on Sony's experience introducing 1.3M-pixel CCD camera modules to the marketplace, Sony has embarked on efforts to respond to customer desires for increased pixel counts, improved functionality, reduced power consumption, and further miniaturization and lower mounting heights in CCD camera modules. The MCB770 introduced here is a new product that responds to these desires with newly-developed technologies such as a 2M-pixel CMOS sensor and an AF function that can handle a wide range of camera to subject distances. This product adopts many ideas from the dedicated digital still camera, which has acquired wide support in the image creation areas, to achieve a balanced and rich set of image expression capabilities.
I I I 3-element, 3-group glass lens with AF function CMOS sensor with 2.01M camera block effective pixels Supports both uncompressed moving picture and JPEG compressed still image data formats Image expression capabilities based on the AE and AWB technologies used in dedicated digital still cameras
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High-Performance Lens with Wide Distance Range AF Function
The MCB770 includes an AF system for the first time in a Sony camera module product. This AF system focuses over a wide range of distances from 10 cm, a distance selected specifically for imaging QR codes, to infinity. It also includes a focus point prediction function to improve focusing performance. In addition to an AF control system that takes advantage of Sony's experience in dedicated digital still cameras, it also adopts a linear method.
This made it possible to create a miniature low-power AF system optimal for a camera module. The MCB770 also supports manual focus. Sony achieved low TV distortion and high resolution performance by combining a lens design optimized in conjunction with the sensor structure with a 3-element, 3-group glass lens.
Newly-Developed DSP for Natural Image Rendition and High-Generality Interface
The MCB770 provides three formats: draft mode, which is intended for preview moving picture, uncompressed capture mode for moving picture recording, and JPEG capture mode for still images. The MCB770 supports flexible end product design by providing a variety of image sizes in each of these modes. The MCB770 provides rich image expression that will not betray our customers' hopes for image creation. The AE and AWB algorithms implemented in the newly-developed DSP are based on concepts from dedicated digital still cameras and take into account the functional balance required in a camera module. The MCB770 thus provides imaging performance in difficult conditions that is equivalent to that of dedicated digital still cameras. Furthermore, the MCB770 provides a scene selection function that can set optimal condition for the camera module simply by selecting a scene mode that matches the scene being imaged.
High Picture Quality CMOS Sensor for Mobile Equipment
The MCB770 includes the IMX011CQ* diagonal 5.97 mm (Type 1/3.0) 2.13M total pixels primary color progressive scan CMOS sensor that was designed at the same time as the MCB770. This device was designed for use in mobile equipment and achieves the high-speed progressive scan of all pixels at 15 frames/s and the same high picture quality as CCD sensors. While it goes without saying that this device uses Sony's know-how developed over many years of CCD development as a foundation, this device also features further optimization of the pixel layout and on-chip microlenses.
* IMX011CQ: See CX-NEWS Vol. 40.
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This newly-developed camera module was made possible by the persistence of each of the persons in charge of the various components; the lens, sensor, DSP, mechanism, mounting, image quality, and plant. Our idea was to provide more freedom and more fun to users, we wanted our users to experience the pleasure of being able to photograph the things around them freely and easily. We are committed to continuing to develop products to the best of our ability.
MCB770
AF
CMOS sensor
Pixel array AFE
VDD_AF VDD_SA VDD_IO VDD_SD VDD_L GND
Lens
AF driver
TIMING
XCLR
SERIALCOMM.
Camera DSP
Shading correction Defect correction Lens controller Control White balance gamma synchronization sharpening Scaler Sync generation JPEG stream Luminance generation Chrominance generation Effect Effect
R656 decoder Stream clock transfer PLL
D7 to D0 DCK VSYNC HSYNC MCK XRST
Controller
AF_GND VDD_AF NC NC GND GND DCK D [0] D [1] D [2] D [3] D [4] D [5] D [6] D [7] GND VSYNC HSYNC XRST SDA SCL VDD_SD VDD_SA GND VDD_IO VDD_L GND MCK GND
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
0.1 F
10 F
Video I/F
R2
R1
VSYNC HSYNC Reset IC
2
2.7 V
1.8 V
0.1 F 10 F
0.1 F 10 F
Clock
0.1 F 10 F 0.1 F
EEPROM
SCL SDA
10 F
1.2 V
I Figure 1 Block Diagram
I Figure 2 Application Circuit Example
I Table 1 Specification Overview
Functions Image sensor 2M-pixel CMOS camera module with AF function for mobile equipment Progressive scan readout diagonal 5.97 mm (Type 1/3.0) color CMOS sensor Total number of pixels 2.13M pixels Camera block number of 2.01M pixels effective pixels
Far
Near
Number of pixels
Recording block number 1632 (H) x 1224 (V) (2M pixels) of effective pixels Horizontal angle of view About 52 2.8 F value Lens 4.8 mm Focal length 100 mm to , AF function provided Subject distance Exposure control Auto (normal and long time exposure modes), hold White balance control Auto tracking, all pull-in, user setting Scene selection A total of six types Uncompressed moving picture, JPEG compressed still images Draft mode: 30 or 15 fps (up to CIF) Data formats Frame rates Uncompressed capture mode: 15 fps (up to VGA) Capture mode: 15 fps (128 x 96 to 2M) Uncompressed moving picture YCbCr 8 bits Video signals JPEG compressed still images Stream data, no headers I2C bus Control signals Input clock frequency 12.0/13.0/14.4/18.0/19.2/24.0/26.0 MHz * 2.7 0.1 V (VDD_AF : AF system) * 2.6 to 2.9 V (VDD_SA : Sensor analog system) * 2.3 to 3.0 V (VDD_IO : DSP I/O) Supply voltage * 1.8 0.1 V (VDD_SD : Sensor digital system) * 1.2 0.1 V (VDD_L : DSP core) Power consumption 170 mW, AF system not operating Operating Absolute maximum rating: -10 to +60C Temperature temperature Recommend operating range: - 5 to +45C conditions Storage temperature -30 to +80C Package dimensions 17.4 mm x 14.5 mm x 10.5 mm (H x W x D) 5g Mass
Sensor
Focus lens Photographic object
Ideal focus point
Contrast Focused picture example (High contrast) High
Low Defocused picture example (Low contrast) Far Near Focus distance
I Figure 3 AF System Operation

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