Abstract: An analog-to-digital converter, a touch sensing chip and an electronic device are disclosed.

Abstract: A touch detection circuit, a touch sensing chip and an electronic device are disclosed. The touch detection circuit includes: a charge/discharge circuit, a 1st-order N-bit ??ADC comprising an adder, an integrator, an N-bit ADC and an N-bit DAC, the adder comprising two input terminals coupled respectively to an output terminal of the charge/discharge circuit and an output terminal of the N-bit DAC, the N-bit DAC comprising an input terminal coupled to an output terminal of the N-bit ADC, wherein the integrator is configured to integrate net incoming charge that the integrator receives; the N-bit ADC is configured to quantize an output of the integrator into an N-bit digital signal; the N-bit DAC is configured to provide subtractive reference charge according to the instruction of the N-bit digital signal; and the adder is configured to derive the net incoming charge by subtracting the subtractive reference charge from the sense charge.

Abstract: A data register unit, a SAR ADC and an electronic device are disclosed. The data register unit comprises: a first high-speed flip-flop; a second high-speed flip-flop; and a first logic gate, wherein the first high-speed flip-flop and the second high-speed flip-flop comprise a high-speed flip-flop circuit respectively, which comprises: a first PMOS transistor, a first NMOS transistor, an inverter and a logic gate. The data register unit of the present disclosure is composed of a high-speed flip-flop circuit with a very simple structure and suitable for fast operation. In a further embodiment, the high-speed flip-flop circuit can combine the bit pulse to realize the capacitor switching based on the comparison result. This increases the operation speed of the SAR ADC while significantly reducing the number of transistors required to implement the EMCS logic.

Abstract: A SAR ADC and an electronic device are disclosed. The SAR ADC includes a read clock generation circuit, configured to connect to a first output terminal and a second output terminal of a dynamic comparator, and generate a read clock signal for reading a first or a second comparison result based on the first and the second comparison result received from the dynamic comparator. The invention reads the comparison result using the read clock signal generated by grabbing the output of the comparator, and can improve the overall analog-to-digital conversion speed of the SAR ADC. Further, the present invention can detect the occurrence of metastable state of the comparator by judging that the output of the comparator has no pulse, and read the comparison result based on the backup clock generated by the operating clock of the comparator.

Abstract: A charge source circuit, an analog-to-digital converter (ADC) and an organic light-emitting diode (OLED) touch panel are disclosed. The charge source circuit includes a reference current generation block, a current mirror block and a charge output block. The charge output block is configured to provide an amount of charge as current times time, rather than voltage times capacitance as conventionally done. This dispenses with the use of a voltage division technique, a drive operational amplifier or a great number of capacitors, resulting in circuit simplicity, reduced cost and circuit layout area savings. Moreover, current and time interval sequences can be designed to enable, with a very small area and voltage, continuous adjustability of the amount of charge within a desired range at a higher resolution. An equivalent capacitance corresponding to the amount of charge can be adjusted within a range from tens to hundreds of pF.

Abstract: A charge source circuit, an analog-to-digital converter (ADC) and an organic light-emitting diode (OLED) touch panel are disclosed. The charge source circuit includes a reference current generation block, a current mirror block and a charge output block. The charge output block is configured to provide an amount of charge as current times time, rather than voltage times capacitance as conventionally done. This dispenses with the use of a voltage division technique, a drive operational amplifier or a great number of capacitors, resulting in circuit simplicity, reduced cost and circuit layout area savings. Moreover, current and time interval sequences can be designed to enable, with a very small area and voltage, continuous adjustability of the amount of charge within a desired range at a higher resolution. An equivalent capacitance corresponding to the amount of charge can be adjusted within a range from tens to hundreds of pF.

Abstract: The embodiments of the present disclosure provide a fingerprint detection method and a fingerprint module. The fingerprint detection method includes: dividing a detection area of the fingerprint module into a plurality of detection blocks, wherein each of the detection blocks comprises a plurality of detection units, and each of the detection units is corresponding to a grayscale value; scanning at least part of the detection blocks to obtain the grayscale values; determining whether each of the detection blocks is in a covered state based on the grayscale values; and counting the number of the detection blocks in the covered state, and sending a collection request to a host to inform the host to obtain a fingerprint image if the number thereof is not less than a coverage block threshold. The method avoids meaningless detection caused by a false touch, and ensures integrity of the fingerprint image collected later.

Abstract: The present disclosure provides an under-screen optical fingerprint identification apparatus and a fingerprint identification method.

Abstract: The present invention relates to a touch detection device, an electronic apparatus and a touch detection method. Each frame of touch related data corresponding to n*m capacitive nodes is obtained by producing n*m coupled signals from encoding operations and subjecting the n*m coupled signals to multiple access accumulation process, common mode suppression process, ADC process and decoding processes. Additionally, touch location information of the n*m capacitive nodes is obtained by acquiring two consecutive frames of touch related data and performing a subtraction operation between the two consecutive frames of touch related data. Therefore, relatively high touch sensing sensitivity is achievable. Before the subtraction operation, common-mode analog voltage amounts subtracted in the common mode suppression process may be not added back for each single frame of touch related data obtained from decoding process.

Abstract: The present disclosure relates to an optical sensing system and an analog-to-digital converter. The optical sensing system includes a ramp signal generator, a digital logic circuit and a plurality of column circuits. The ramp signal generator is configured to generate a ramp signal and transmit the ramp signal to the column circuits. The ramp signal includes a signal of which a signal intensity varies with time, and a signal intensity variation rate of the ramp signal corresponds to an amplification factor of a photosensitive electric signal. Each column circuit is configured to receive photosensitive electric signal, and output a photosensitive gain signal to the digital logic circuit according to ramp signal and photosensitive electric signal. Photosensitive gain signal includes a digital signal corresponding to photosensitive electric signal of which signal intensity is amplified. The digital logic circuit is configured to calculate a digital sampling signal according to photosensitive gain signals.

Abstract: An image sensor includes an image sensor pixel array having pixels. Each pixel includes a continuous active region having a first portion and a second portion extending from the first portion. A photodiode, a reset transistor, a drive transistor, and a select transistor are formed in and over the first portion. The photodiode and the reset transistor define a floating diffusion region therebetween. A switch transistor is formed in and over the second portion and includes a first source/drain region and a second source/drain region. The first source/drain region is included in the floating diffusion region. The second source/drain region interfaces a doped region formed in the second region. The pixel also includes a gate structure disposed directly over the doped region. By controlling the switch transistor, the pixel may operate in a high conversion gain mode or a low conversion gain mode to accommodate different illumination or exposure conditions.

Abstract: The present invention relates to a touch detection device, an electronic apparatus and a touch detection method. Each frame of touch related data corresponding to n*m capacitive nodes is obtained by producing n*m coupled signals from encoding operations and subjecting the n*m coupled signals to multiple access accumulation process, common mode suppression process, ADC process and decoding processes. Additionally, touch location information of the n*m capacitive nodes is obtained by acquiring two consecutive frames of touch related data and performing a subtraction operation between the two consecutive frames of touch related data. Therefore, relatively high touch sensing sensitivity is achievable. Before the subtraction operation, common-mode analog voltage amounts subtracted in the common mode suppression process may be not added back for each single frame of touch related data obtained from decoding process.

Abstract: A touch detection method, a touch control chip and a touch control display device are disclosed. In the touch detection method, coded data is loaded in drive channels and collected from sense channels. The collected data is decoded and subjected to differential processes. This results in a reduced common-mode signal, interference and noise. A touch response detection is carried out to choose at least one sense channel without touch response from sense channels as reference channel. This dynamically chosen reference channel reduces the risk of inaccurate touch location inference caused by abnormalities of static dummy reference channel and helps improve touch location detection accuracy, sense channels close to ends of capacitive touch control device are allowed to participate in touch response detection as other sense channels do, resulting in an expanded touch control range. The touch control chip and touch control display device all have similar advantages.

Abstract: Methods and systems are provided for Remote Application Programming Interface (RAPI) communications between server and client devices. In an embodiment, server and client devices comprise memories and hardware processors coupled to the memories. The hardware processors execute instructions to perform operations that instantiate access point instances on both server side and client side. The instructions are generated from compiling API interface classes with remote communication classes, wherein the compiling includes a procedure of creating new classes through double inheritance. By receiving an API connection message from a client device, the server device clones a default relayer access point instance and assigns the cloned relayer access point instance to process API requests received thereafter from the client device.

Abstract: Disclosed is a system and method for a capacitive sensing device. The method includes transmitting a stimulation signal to a driving channel of the capacitive sensing device. The stimulation signal includes a plurality of sub-stimulation signals. Each of the sub-stimulation signals is characterized by an amplitude and a frequency. The frequencies of the sub-stimulation signals are orthogonal. The method further includes receiving a charge signal from a sensing channel of the capacitive sensing device. The charge signal is generated from the stimulation signal through a capacitance between the driving channel and the sensing channel. The method further includes detecting, from the charge signal, a plurality of sub-charge signal amplitudes at the frequencies of the sub-stimulation signals, and reporting a value about the capacitance from the sub-charge signal amplitudes. The method benefits the capacitive sensing device for increased noise immunity, reduced dynamic range, and reduced power consumption.

Abstract: Systems and methods for testing mobile device s are disclosed. In an embodiment, a mobile device testing system comprises a non-transitory memory and one or more hardware processors coupled to the non-transitory memory. The one or more hardware processors execute instructions to perform operations that include receiving a command XML sheet and rendering the command XML sheet into a user interface application, wherein the command XML sheet comprises elements corresponding to one or more commands for testing a mobile device.

Abstract: Disclosed are a capacitive touch screen and a single layer wiring electrode array. The single layer wiring electrode array includes capacitive regions and wiring regions located on one plane. Wires in the wiring regions are zigzag-shaped or wave-shaped. The capacitive touch screen includes a substrate; a single layer wiring electrode array disposed over the substrate, wherein the single layer wiring electrode array includes capacitive regions and wiring regions located on one plane and wires in the wiring region are zigzag-shaped or wave-shaped; and control ports for connecting to one or more integrated circuits, wherein the wires in the wiring regions are connected to the control ports respectively. The single layer wiring electrode array and the capacitive touch screen lower the fabrication cost and improve the display effects.

Abstract: A fingerprint sensing device comprises a substrate and an array of sensor cells formed over the substrate. The sensor cells are divided into multiple groups. Each group is associated with a group-identifiable signal. The sensor cells in each group are configured to transmit the group-identifiable signal of the respective group and are further configured to simultaneously receive the group-identifiable signals transmitted by the sensor cells in other groups. The group-identifiable signals are orthogonal with respect to each other.

Abstract: Methods and systems are provided for Remote Application Programming Interface (RAPI) communications between server and client devices. In an embodiment, server and client devices comprise memories and hardware processors coupled to the memories. The hardware processors execute instructions to perform operations that instantiate access point instances on both server side and client side. The instructions are generated from compiling API interface classes with remote communication classes, wherein the compiling includes a procedure of creating new classes through double inheritance. By receiving an API connection message from a client device, the server device clones a default relayer access point instance and assigns the cloned relayer access point instance to process API requests received thereafter from the client device.

Abstract: A fingerprint information detection circuit comprises an amplification unit, a source follower unit, a reset unit, and a feedback unit. The amplification unit is coupled to the source follower unit. The reset unit is coupled to both the feedback unit and the amplification unit. The feedback unit and the amplification unit are coupled. The reset unit includes a first transistor and a reset transistor, wherein source and drain electrodes of the first transistor are coupled, wherein one of source and drain electrodes of the reset transistor is coupled to the source and drain electrodes of the first transistor.