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1. WO2013070932 - CONDITIONAL-RESET, TEMPORALLY OVERSAMPLED IMAGE SENSOR

Publication Number WO/2013/070932
Publication Date 16.05.2013
International Application No. PCT/US2012/064177
International Filing Date 08.11.2012
IPC
H04N 5/335 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors
CPC
H04N 1/00769
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
00681Detecting the presence, position or size of a sheet or correcting its position before scanning
00763Action taken as a result of detection
00769Comparing, e.g. with threshold
H04N 5/235
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
222Studio circuitry; Studio devices; Studio equipment ; ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
225Television cameras ; ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, camcorders, webcams, camera modules specially adapted for being embedded in other devices, e.g. mobile phones, computers or vehicles
235Circuitry ; or methods; for compensating for variation in the brightness of the object ; , e.g. based on electric image signals provided by an electronic image sensor
H04N 5/2355
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
222Studio circuitry; Studio devices; Studio equipment ; ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
225Television cameras ; ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, camcorders, webcams, camera modules specially adapted for being embedded in other devices, e.g. mobile phones, computers or vehicles
235Circuitry ; or methods; for compensating for variation in the brightness of the object ; , e.g. based on electric image signals provided by an electronic image sensor
2355by increasing the dynamic range of the final image compared to the dynamic range of the electronic image sensor, e.g. by adding correct exposed portions of short and long exposed images
H04N 5/3355
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors [SSIS]
3355with digital output of the sensor cell, e.g. dynamic RAM image sensors
H04N 5/3535
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors [SSIS]
351Control of the SSIS depending on the scene, e.g. brightness or motion in the scene
353Control of the integration time
3535with different integration times within the sensor
H04N 5/355
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors [SSIS]
351Control of the SSIS depending on the scene, e.g. brightness or motion in the scene
355Control of the dynamic range
Applicants
  • RAMBUS INC. [US]/[US]
Inventors
  • VOGELSANG, Thomas
  • STORK, David, Geoffrey
  • LINSTADT, John, Eric
  • HARRIS, James, E.
Agents
  • SHEMWELL, Charles, E.
Priority Data
61/557,36408.11.2011US
61/557,36808.11.2011US
61/580,18923.12.2011US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CONDITIONAL-RESET, TEMPORALLY OVERSAMPLED IMAGE SENSOR
(FR) CAPTEUR D'IMAGE TEMPORELLEMENT SURÉCHANTILLONNÉ À RÉINITIALISATION CONDITIONNELLE
Abstract
(EN)
Pixel circuits in an image sensor are sampled repetitively during an image frame period. At each sampling, a signal indicative of the photocharge integrated by a pixel circuit since last reset is compared to a threshold. If the integrated photocharge signal has not reached the threshold, the pixel circuit is permitted to continue integrating photocharge. If the integrated photocharge signal has reached the threshold, the pixel circuit is reset to remove integrated photocharge and photocharge integration for that pixel circuit is restarted. A corresponding pixel circuit value is recorded for the reset pixel circuit.
(FR)
Selon l'invention, des circuits de pixel dans un capteur d'image sont échantillonnés d'une manière répétée durant une période d'image. A chaque échantillonnage, un signal indicatif de la photocharge intégrée par un circuit de pixel depuis la dernière réinitialisation est comparé à un seuil. Si le signal de photocharge intégrée n'a pas atteint le seuil, le circuit de pixel est autorisé à continuer à intégrer la photocharge. Si le signal de photocharge intégrée a atteint le seuil, le circuit de pixel est réinitialisé afin de supprimer la photocharge intégrée et l'intégration de photocharge pour ce circuit de pixel est redémarrée. Une valeur de circuit de pixel correspondante est enregistrée pour le circuit de pixel réinitialisé.
Also published as
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