Abstract: Provided is an identification method for an identification system, which includes a sensing area and an image sensor. First, a test object is close to the sensing area, so that the image sensor generates a dynamic image. Next, the test object gradually pressurizes the sensing area. Then, the test object completely covers the sensing area, and the image sensor further produces a perspective image. Finally, an identification module is used to determine whether the dynamic image is a biological image according to the perspective image, and to perform a subtraction operation on the dynamic image as a basis to determine whether to unlock the identification system. Therefore, the identification system and the identification method can achieve a real-time determination on whether the dynamic image is a biological image. Also, the identification method greatly improves the false acceptance rate (FAR) and the false rejection rate (FRR) of the identification system.

Abstract: A multimedia system applying ToF ranging and its operating method are provided. The multimedia system includes a plurality of electronic devices. Each of the electronic devices includes a processing module, a ToF module, and a communication module. The ToF module is configured to perform a ToF operation. The communication module is configured to perform wireless communication. The electronic devices communicate via respective communication modules to formulate an operation protocol and respective UIDs and to perform a time slot synchronization between different electronic devices. The electronic devices sequentially perform the ToF ranging operation according to the operation protocol and the respective UIDs.

Abstract: Provided is an identification method for an identification system, which includes a sensing area and an image sensor. First, a test object is close to the sensing area, so that the image sensor generates a dynamic image. Next, the test object gradually pressurizes the sensing area. Then, the test object completely covers the sensing area, and the image sensor further produces a perspective image. Finally, an identification module is used to determine whether the dynamic image is a biological image according to the perspective image, and to perform a subtraction operation on the dynamic image as a basis to determine whether to unlock the identification system. Therefore, the identification system and the identification method can achieve a real-time determination on whether the dynamic image is a biological image. Also, the identification method greatly improves the false acceptance rate (FAR) and the false rejection rate (FRR) of the identification system.

Abstract: A ranging device and a ranging method are provided. The ranging device includes a light source, an image sensor, and a processor. The light source projects a plurality of projection patterns onto a surface of an object to be measured at different times. The image sensor senses the surface of the object to be measured in synchronization with projection times of the projection patterns to obtain a plurality of sensing images respectively corresponding to the projection patterns. The processor analyzes the sensing images to determine depth information of the object to be measured. The processor performs trigonometric calculations to obtain the depth information.

Abstract: An image sensor and an image sensing method are provided. The image sensor includes a photodiode, a first storage circuit, a first readout circuit, a second storage circuit, and a second readout circuit. When the image sensor is operated in a dynamic vision sensing mode, the first storage circuit stores a first dynamic vision sensing signal provided by the photodiode during a first exposure period of a first frame period, and the second storage circuit stores a second dynamic vision sensing signal provided by the photodiode during a second exposure period of the first frame period. The first readout circuit and the second readout circuit output a first readout signal and a second readout signal to a first input terminal and a second input terminal of a differential amplifier at the same time according to the first dynamic vision sensing signal and the second dynamic vision sensing signal.

Abstract: A dynamic vision sensor, including a first sensing pixel, another first sensing pixel, a storage capacitor, and another storage capacitor, is provided. The first sensing pixel includes a plurality of color light sensing sub-pixels, a first pixel circuit, an infrared light sensing sub-pixel, a second pixel circuit, and a ramp capacitor. The ramp capacitor is coupled to a ramp up signal. The second pixel circuit outputs a sensing result of the infrared light sensing sub-pixel to the storage capacitor. The another first sensing pixel includes another plurality of color light sensing sub-pixels, another first pixel circuit, another infrared light sensing sub-pixel, another second pixel circuit, and another ramp capacitor. The another ramp capacitor is coupled to a ramp down signal. The another second pixel circuit outputs a sensing result of the another infrared light sensing sub-pixel to the another storage capacitor.

Abstract: An image sensor and an image sensing method are provided. The image sensor includes a photodiode, a first storage circuit, a first readout circuit, a second storage circuit, and a second readout circuit. When the image sensor is operated in a dynamic vision sensing mode, the first storage circuit stores a first dynamic vision sensing signal provided by the photodiode during a first exposure period of a first frame period, and the second storage circuit stores a second dynamic vision sensing signal provided by the photodiode during a second exposure period of the first frame period. The first readout circuit and the second readout circuit output a first readout signal and a second readout signal to a first input terminal and a second input terminal of a differential amplifier at the same time according to the first dynamic vision sensing signal and the second dynamic vision sensing signal.

Abstract: An output stage circuit including a current source circuit, a bias circuit, and an output circuit is provided. The bias circuit is coupled between the current source circuit and a ground terminal voltage. The output circuit includes a first transistor, a second transistor, a third transistor, and a load circuit. A control terminal of the first transistor is coupled to the bias circuit. The load circuit is coupled to a second terminal of the first transistor. A second terminal of the second transistor is coupled to a first terminal of the first transistor. A first terminal of the third transistor is coupled to the second terminal of the first transistor.

Abstract: A light sensor and a sensing method thereof are provided. The light sensor includes a plurality of sensing sub-pixels and a control circuit. The sensing sub-pixels are arranged in an array to form a sensing array. The control circuit is coupled to the sensing sub-pixels. The control circuit operates a plurality of diodes of the sensing sub-pixels in a photodiode mode to sense intensity of ambient light. The control circuit operates the diodes in a Geiger mode or in an avalanche linear mode according to the intensity of the ambient light.

Abstract: The invention relates to a drive sensing structure, applicable to an environment of an organic light-emitting display device. The driving sensing structure includes: an organic diode, a driving circuit, a sensing circuit, and a voltage maintaining circuit; wherein, the driving circuit is used to receive a control signal and generate a corresponding voltage signal to drive the organic diode to emit light stably. The sensing circuit is used to convert a sensing voltage generated by the organic diode after receiving the light source into an image electrical signal. The voltage maintaining circuit is used to adjust the voltage signal of the driving circuit to prevent the voltage signal of the driving circuit from drifting. Thereby, the bidirectional organic light-emitting display device can be used not only as a light-emitting element, but also as a sensor for fingerprint image recognition, palmprint recognition, and touch function, thereby achieving the purposes of cost reduction and wide applicability.

Abstract: The invention relates to an image sensor, including a substrate, a unit pixel, a first polarizer, a second polarizer, and readout circuit. First, incident light is emitted to the image sensor, and the first and second polarizers convert incident light into first and second incident lights respectively. Then, the photoelectric conversion element of the unit pixel covered by the first and second polarizers respectively generates first and second electrons after receiving the first and second incident lights respectively. Afterwards, the readout circuit performs subtraction and integral of the first electron and the second electron to generate a voltage signal corresponding to the number of electrons in the actual signal. Finally, repeat the above steps. Thereby, the image sensor of the invention effectively increases the full well capacity of the equivalent unit pixel, so as to improve the signal-to-noise ratio of the image sensor of the invention.

Abstract: An image sensing device and an image sensing method are provided. The image sensing device includes a pixel array and a readout circuit. The pixel array includes multiple sensing sub-pixels arranged in an array. During a first exposure period of a frame period, the sensing sub-pixels are simultaneously exposed to respectively store multiple first sensing signals in multiple storage units of the sensing sub-pixels. During multiple first readout periods of the frame period, the readout circuit sequentially reads out the first sensing signals stored in the storage units during different periods. During each of multiple dynamic sensing periods of the frame period, all or part of the sensing sub-pixels are reset and then simultaneously exposed again, and the readout circuit then simultaneously reads out multiple second sensing signals of the sensing sub-pixels.

Abstract: An image sensing device and an image sensing method are provided. The image sensing device is adapted to sense a target object in a situation without ambient light. The image sensing device includes a modulated light source, an image sensor, and a processing circuit. The modulated light source includes light sources. The image sensor includes sensing pixels. The image sensor is a color filter-free sensor. In one frame period, the light sources emit sensing light beams at different timings, and the sensing pixels at different timings sense reflected light beams generated by the sensing light beams reflected by the target object. The processing circuit synthesizes first images corresponding to a part of the reflected light beams to generate a complete sensing image. The processing circuit obtains depth information of the target object according to another part of the reflected light beams.

Abstract: Provided is a data transmission system including analog image frame buffer, line analog-to-digital converter, line buffer memory, and an interface. First, the analog image frame buffer stores the image data lines generated from the image sensor as analog signals, and then the line analog digital converter which is electrically connected to the analog image frame buffer converts the image data lines from analog signals to digital signals. Then, the image data lines converted into digital signals are stored in one of the line buffer memories. Then, according to the user's needs, the image data line of the digital signal is temporarily stored in another line buffer memory. Finally, according to the instructions of the master device, the interface outputs the image data lines of digital signals according to the conversion order of the line analog to digital converter.

Abstract: An image sensing method, applicable to the anti-spoofing recognition of under screen optical fingerprint sensing, is provided, including: dividing the image sensor into sensing blocks, dividing the display area of the display device correspondingly according to the sensing area, and the display area including the light-emitting area; defining the luminous color of each display area and the color coordinate value of each luminous color; each sensing block sensing the light intensity of the image reflected to the sensing block from the display block emitting the light onto the reference object and the test object to be measured; calculating the anti-spoofing reference color information of the reference object and registering in the system; when sensing the fingerprint image, first obtaining the light intensity of each block, then calculating the color information of the test object; and finally, comparing the color information with the registered anti-spoofing reference color information.

Abstract: The invention relates to a biometric sensing system, comprising: a light emitter, a polarization sensor, and a signal processing module, wherein the polarization sensor includes a first polarizer and a second polarizer. First, the light emitter emits a plurality of emitted light from the object under sensing, and reflected by the object. Then, a first reflected light in a first polarization direction and a second reflected light in a second polarization direction in the reflected light are sensed by the polarization sensor. Finally, the signal processing module calculates a first reflectance and a second reflectance according to the first reflected light and the second reflected light, and generate a reflectance ratio based on the first reflectance and the second reflectance. As such, the user determines whether the surface of the object under sensing is 3D by the reflectance ratio, so as to achieve improving safety and saving costs.

Abstract: A light sensor and a ranging method are provided. The light sensor includes a light source, a sensing sub-pixel, and a control circuit. The sensing sub-pixel includes a diode. The control circuit operates the diode in a Geiger mode or an avalanche linear mode. The control circuit includes a time-to-digital converter, and the time-to-digital converter includes a counting circuit. The counting circuit includes a plurality of counting units. When the time-to-digital converter receives a sensing signal provided by the sensing sub-pixel, the control circuit generates a plurality of count values according to the sensing signal through the counting units of the counting circuit, where the count values are histogram data corresponding to a distance sensing result.

Abstract: A light sensor and a sensing method thereof are provided. The light sensor includes a plurality of sensing sub-pixels and a control circuit. The sensing sub-pixels are arranged in an array to form a sensing array. The control circuit is coupled to the sensing sub-pixels. The control circuit operates a plurality of diodes of the sensing sub-pixels in a photodiode mode to sense intensity of ambient light. The control circuit operates the diodes in a Geiger mode or in an avalanche linear mode according to the intensity of the ambient light.

Abstract: A light sensor and its calibration method are provided. The light sensor includes a light source, a sensing sub-pixel, and a control circuit. The light source emits a sensing light beam. The sensing sub-pixel includes a diode, a quenching resistor, and a time-to-digital converter. The diode has a first terminal coupled to an operation voltage. The quenching resistor is coupled between a second terminal of the diode and a ground voltage. The time-to-digital converter is coupled to the second terminal of the diode. The control circuit is coupled to the sensing sub-pixel and calibrates a sensing sensitivity of the sensing sub-pixel according to at least one of a photon detection probability, an internal gain value, and a resistance value of the quenching resistor corresponding to the diode of the sensing sub-pixel, so that the sensing sub-pixel generates a single-photon avalanche diode sensing signal only when receiving the sensing light beam.

Abstract: A dynamic vision sensor, including a first sensing pixel, another first sensing pixel, a storage capacitor, and another storage capacitor, is provided. The first sensing pixel includes a plurality of color light sensing sub-pixels, a first pixel circuit, an infrared light sensing sub-pixel, a second pixel circuit, and a ramp capacitor. The ramp capacitor is coupled to a ramp up signal. The second pixel circuit outputs a sensing result of the infrared light sensing sub-pixel to the storage capacitor. The another first sensing pixel includes another plurality of color light sensing sub-pixels, another first pixel circuit, another infrared light sensing sub-pixel, another second pixel circuit, and another ramp capacitor. The another ramp capacitor is coupled to a ramp down signal. The another second pixel circuit outputs a sensing result of the another infrared light sensing sub-pixel to the another storage capacitor.