Sony developed back-illuminated structure CMOS image sensor, "IMX178LQJ", supporting three formats of 4:3, 5:4, and 16:9 ratio with type 1/2 in 5M-effective pixel. Adopting back-illuminated structure with 2.4 µm unit pixel and 14 bit ADC, it provides all three advantages of high resolution, high sensitivity, and high dynamic range, which are necessary for security cameras.
*1: For details on the IMX185LQJ, see the New Products section of this volume.
* "Exmor R" is a trademark of Sony Corporation. The "Exmor R" is a Sony's CMOS image sensor with significantly enhanced imaging characteristics including sensitivity and low noise by changing fundamental structure of "Exmor" pixel adopted column-parallel A/D converter to back-illuminated type.
* STARVIS is a trademark of Sony Corporation. The STARVIS is back-illuminated pixel technology used in CMOS image sensors for surveillance camera applications. It features a sensitivity of 2000 mV or more per 1 µm2 (color product, when imaging with a 706 cd/m2 light source, F5.6 in 1 s accumulation equivalent), and realizes high picture quality in the visible-light and near infrared light regions.
To achieve high sensitivity, which is one of the most important characteristics for security cameras, this time Sony developed back-illuminated structure 2.4 µm unit pixel and accomplished the equivalent sensitivity as the existing back-illuminated structure 2.8 µm unit pixel, "IMX136LQJ". Also near infrared sensitivity was improved from the IMX136LQJ, which is equivalent to the IMX236LQJ*2, and it is suitable for Day/Night cameras and near infrared light LED used as auxiliary light.
*2: For details on the IMX236LQJ, see the New Products section of this volume.
Dynamic range is determined by the ratio of saturation signal and dark random noise. The IMX178LQJ featuring 14 bit ADC reduced quantization noise and also suppressed dark random noise. At the result, high dynamic range was achieved, which is equivalent to the existing 3.75 µm unit pixel, the IMX104LQJ. It enables clear image quality in light and dark areas even for the objects with high contrast.
The format for image size of security camera is typically 4:3, 5:4 for fisheye lens, or 16:9 for full HD. The IMX178LQJ supports all these three formats in 5M pixels high resolution. Also it secures high resolution as well as high sensitivity and high dynamic range at the same time, therefore the specification works best for high performance security cameras with type 1/2 lenses.
The IMX178LQJ is pin compatible with the 3.75 µm unit pixel full HD image sensor, the ICX185LQJ, supporting type 1/2 lenses. If you are using the IMX185LQJ, please do not miss the chance to try the performance of the IMX178LQJ.
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Number of recommended recording pixels: All-pixel scan approx. 6.29M pixels (3:2), approx.
5.04M pixels (4:3), approx. 5.24M pixels (5:4), and approx. 5.31M pixels (16:9).
A/D conversion 12 bit mode
A/D conversion 14 bit mode
|Image size||Diagonal 8.92 mm (Type 1/1.8) Approx. 6.38M pixels all-pixel scan
Diagonal 7.83 mm (Type 1/2.0) Approx. 5.11M pixels 4:3
Diagonal 7.92 mm (Type 1/2.0) Approx. 5.32M pixels 5:4
Diagonal 8.51 mm (Type 1/1.9) Approx. 5.39M pixels 16:9
|Transfer method||All-pixel scan|
|Number of effective pixels||3096 (H) × 2080 (V) Approx. 6.44M pixels|
|Unit cell size||2.4 µm (H) × 2.4 µm (V)|
|Optical blacks||Horizontal||Front:0 pixels, rear: 0 pixels|
|Vertical||Front:14 pixels, rear: 0 pixels|
|Input drive frequency||54 MHz/27 MHz/74.25 MHz/37.125 MHz|
|Supply voltage VDD (Typ.)||2.9 V/1.8 V/1.2 V|
|Sensitivity (F5.6)||Typ.||425 mV||1/30s accumulation|
|Saturation signal||Min.||945 mV||Tj = 60°C|
|Drive mode||Number of recommended recording pixels||ADC||Frame rate (Max.)|
|All-pixel scan||3072 (H) × 2048 (V) approx. 6.29M pixels||12 bit||29.97 frame/s|
|14 bit||29.97 frame/s|
|5M 4:3||2592 (H) × 1944 (V) approx. 5.04M pixels||12 bit||59.94 frame/s|
|14 bit||29.97 frame/s|
|5M 5:4||2560 (H) × 2048 (V) approx. 5.24M pixels||12 bit||59.94 frame/s|
|14 bit||29.97 frame/s|
|5M 16:9||3072 (H) ×1728 (V) approx. 5.31M pixels||12 bit||60 frame/s|
|14 bit||30 frame/s|
*Sony reserves the right to change products and specifications without prior notice.
Development of the IMX178LQJ started to consider qualifications for ideal security cameras. The cameras have enough resolution in zoomed images, and have clear images in high contrast day-time shooting and dark night-time shooting. To realize the ideal qualifications, the project members continued the development and reached to the result of this image sensor. From the IMX178LQJ, we will develop type 1/2 CMOS image sensors for high performance security cameras.