Raydium Semiconductor Corporation

Raydlum Semiconductor Corporation

Ko-Yang Tso

Hui-Wen Miao

Chin-Chieh Chao

Yann-Hsiung Liang

Ren-Feng Huang

Chih-Chuan Huang

Chien-Ming Chen

Shang-Ping Tang

Chien-Yu Chan

Chien-Kuo Wang

Hui Wen Miao

Yong-Nien Rao

Hung Li

Chih-Yu Lee

Keh-La Lin

A driving circuit includes at least one reference voltage source, at least one offset unit, and at least one buffer module. The at least one reference voltage source generates a reference voltage. The at least one offset unit generates an offset voltage, wherein the offset voltage and the reference voltage form a judging voltage range. The at least one buffer module has a first input end, a second input end, and an output end, wherein the first input end receives an analog voltage; the at least one reference voltage source is connected with the second input end; the at least one buffer module, according as whether the analog voltage is within the judging voltage range, outputs a pass logic signal or a fail logic signal at the output end. Particularly, the buffer module has Built-In-Self-Test (BIST) function and can increase test efficiency and voltage accuracy.

Driving circuit having built-in-self-test function

The present invention provides a touch sensing apparatus including a plurality of pins, a logic control module, and at least one driving/sensing control module. The logic control module generates a plurality of control signals having different control timings. Each driving/sensing control module is coupled with the logic control module and the pins, wherein the driving/sensing control module receives a first control signal of the control signals from the logic control module and controls the pins to execute a plurality of pin functions according to a first control timing of the first control signal, so that the pins simultaneously sense a plurality of analog data from a conductive thin film sensor.

Touch sensing apparatus

A digital-to-analog (D/A) converter comprises a decoder apparatus and an operational amplifier. The decoder apparatus comprises first and second decoder unit. The first decoder unit selects a voltage of first voltage set as first and second voltage in response to a value of first gray level set. The second decoder unit selects first border voltage of second voltage set as the first and the second voltages and second border voltage of that as the first and the second voltages in response to the maximum and the minimum value of second gray level set respectively. The second decoder unit further selects the first and the second boarder voltage as the first and the second voltage respectively in response to an intermediate value of the second gray level set. The operational amplifier generates a pixel voltage having level between the first and the second voltage accordingly.

Digital-to-analog converter and method thereof

A sampling phase selection method for a data stream is provided, wherein the data stream has a variable data rate in a fixed time period. The method comprises generating a calibration signal, wherein the time interval of the calibration signal is longer than the fixed time period of the data stream, generating a first clock sequence and a subsequent second clock sequence, wherein the first and the second clock sequence are composed of a plurality of continuous clock phases and the number of the clock phases of the first clock sequence are the same as that of the clock phases of the second clock sequence, selecting one of the phases of the first and the second clock sequence, in turn, to provide a sampling phase, performing a plurality of samplings on the data stream to generate a flag signal, and selecting a final sampling phase according to the flag signals with different sampling phases.

Sampling phase selection method for a stream of data bits

A touch sensing apparatus is disclosed. The touch sensing apparatus includes a logic control module, at least one storage control module, and at least one decoding control module. The logic control module is used to generate a plurality of control signals having different control timings. The plurality of control signals includes a storage control signal and a decoding control signal. Each storage control module includes a plurality of storage capacitors, and respectively stores each of sensed voltages in different storage capacitors at different times according to a storage control timing of the storage control signal. The sensed voltages are analog data sensed from scan lines of an ITO sensor. The decoding control module is used to decode the sensed voltages stored in the storage capacitors according to a decoding control timing of the decoding control signal to output the decoded analog data.

Signal-to-noise ratio enhancing touch sensing apparatus using charge sharing method

The current disclosure discloses a sampling phase selection method for a data stream, wherein the data stream has a variable data rate in a fixed time period. The method comprises the following steps: generating M section signals with the same time interval during the fixed time period of the data stream, generating N continuous clock phases according to a rising edge of each of the section signals, selecting one of the continuous clock phases corresponding to the different section signals in turn to provide a sampling phase, performing a plurality of samplings on the data stream to generate a flag signal, repeating the selecting and the sampling steps to generate N flag signals corresponding to the different section signals, and selecting a final sampling phase according to the N flag signals corresponding to the different section signals.

An analog to digital converter generating a number of corresponding voltages in response to a number of values of a grey level is provided. The analog to digital converter includes a decoder and an operational amplifier. The decoder provides first to third output voltages having the same level when w most significant bits (MSBs) of the grey level correspond to the same value, provides first and second intermediate voltages in response to the x MSBs next to the w MSBs when the w MSBs correspond to different values, and selectively has the first to the third output voltages equal to one of the first and the second intermediate voltages. The operational amplifier obtains a pixel voltage by interpolating the first to the third output voltages, wherein the sum of w and x is smaller than or equal to the bit number of the gray level.

Analog to digital converter

A touch sensing apparatus is disclosed. The touch sensing apparatus includes a logic control module, at least one storage control module, and at least one decoding control module. The logic control module is used to generate a plurality of control signals having different control timings. The plurality of control signals includes a storage control signal and a decoding control signal. Each storage control module includes a plurality of storage capacitors, and respectively stores each of sensed voltages in different storage capacitors at different times according to a storage control timing of the storage control signal. The sensed voltages are analog data sensed from scan lines of an ITO sensor. The decoding control module performs analog adding process to the sensed voltages stored in the storage capacitors according to a decoding control timing of the decoding control signal to output decoded analog data with high signal-to-noise ratio (SNR).

Signal-to-noise ratio enhancing touch sensing apparatus using charge pump method

An output buffer of a source driver is disclosed. The output buffer includes a buffer input, a buffer output, a differential input stage, a bias current source, an output stage, a compensation capacitor, and a comparator. The output stage and the comparator are both operated between an analog supply voltage (AVDD) and a half analog supply voltage (HAVDD), or both operated between the half analog supply voltage (HAVDD) and a ground voltage. The comparator compares an input signal with an output signal and outputs a control signal to the bias current source according to the compared result.

Output buffer of source driver

An output buffer of a source driver is disclosed. The output buffer includes a buffer input, a buffer output, a differential input stage, a bias current source, an output stage, a compensation capacitor, and a comparator. The output stage and the comparator are both operated between an analog supply voltage (AVDD) and a ground voltage (AGND). The comparator compares an input voltage and an output voltage and outputs a control signal to the bias current source according to the compared result to control a bias current outputted by the bias current source to enhance the slew rate of the output buffer.

A signal circuit includes a clock terminal for transmitting a reference clock and a data terminal for transmitting an input/output data. In an embodiment, the frequency of the reference clock is one-eighth of the bit rate of the input/output data.

Signal circuit

A sampling clock selection module for a serial data stream is disclosed. The sampling clock selection module includes a multi-phase generation circuit, a sampling circuit, a comparison unit and a logic operation unit. The multi-phase generation circuit generates a plurality of non-overlapping clock phases derived from a reference clock signal. The phase selection circuit selects a sampling clock phase under a calibration mode. The sampling circuit performs sampling on the serial data stream a plurality of times to generate a plurality of sampled values in response to the sampling clock phase. The comparison unit compares the sampled values with the serial data stream so as to update a plurality of flag signals. The logic operation unit performs a logic operation on the flag signals so as to select a sampling clock phase under a normal operation mode from the clock phases.

Sampling clock selection module of serial data stream

The invention discloses a controlling apparatus for a signal outputting circuit in an electronic system. The controlling apparatus includes a detecting circuit, a switch, and a controlling circuit. The detecting circuit is used for detecting whether the electronic system has an abnormal condition. The switch is electrically connected between a signal receiving terminal and the signal outputting circuit. The controlling circuit is electrically connected between the detecting circuit and the switch. Once the detecting circuit detects that the electronic system has the abnormal condition, the controlling circuit sets the switch into a high-impedance state.

Controlling apparatus and controlling method for signal outputing circuit and video system

A source driver and a receiver thereof are disclosed. A two-stage amplifier of the receiver includes a first-stage circuit and a second-stage circuit. The second-stage circuit includes a first switch, a second switch, a third switch, a first node, and a second node. The first switch is coupled between the first node and a ground end; the second switch is coupled between the second node and the ground end; the third switch is coupled between the first node and the second node. When the receiver wants to wake up from a power-saving mode to a normal operation mode, the first switch and the second switch are switched to the off-state according to a control signal at first; after a period of delay time, the third switch is also switched to the off-state according to a delayed control signal.

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Taipei, Taiwan

Ko-Yang Tso