A display panel and a display device are provided. The display panel includes a display unit; a visual test component including test signal input terminals; a driving chip including display signal input terminals; and a plurality of signal lines configured to generate driving signals for the display unit. In a visual test phase, the visual test component is configured to provide signals to signal lines through test signal input terminals. In a display phase, the driving chip is configured to provide signals to the signal lines through the display signal input terminals. The visual test component includes at least one first switch connected to at least one signal line. A control terminal of the at least one first switch is connected to the driving chip. In the visual test phase, the at least one first switch is turned on for connection under a control of the visual test component.

A display panel and a display device are provided. The display panel includes a display unit; a visual test component including test signal input terminals; a driving chip including display signal input terminals; and a plurality of signal lines configured to generate driving signals for the display unit. In a visual test phase, the visual test component is configured to provide signals to signal lines through test signal input terminals. In a display phase, the driving chip is configured to provide signals to the signal lines through the display signal input terminals. The visual test component includes at least one first switch connected to at least one signal line. A control terminal of the at least one first switch is connected to the driving chip. In the visual test phase, the at least one first switch is turned on for connection under a control of the visual test component.

An apparatus and method for diagnosing a failure in a blower of a vehicle improve performance of various systems using state information of the blower. The apparatus and method include a controller that converts an operating current value supplied to the blower of the vehicle into a voltage value and diagnoses whether the blower fails based on the voltage value. The apparatus and method also include a display that displays whether the blower fails.

An apparatus and method for diagnosing a failure in a blower of a vehicle improve performance of various systems using state information of the blower. The apparatus and method include a controller that converts an operating current value supplied to the blower of the vehicle into a voltage value and diagnoses whether the blower fails based on the voltage value. The apparatus and method also include a display that displays whether the blower fails.

A test voltage sample and hold circuitry is disclosed in a readout circuitry of an image sensor. This circuitry samples a voltage at demand value based on a ramp voltage shared by the ADC comparators of the readout circuitry. The value of the sampled voltage is controlled by a control circuitry which is able to predict and calculate at what time a ramp generator may carry the demand voltage value. The sampled voltage is held by a hold capacitor during readout of one row and is accessed during the next row by the control circuitry as test data to drive a device under test (DUT) which may be any portion of the image sensor to be tested. Measured data out of the DUT is compared with expected data. Based on the result of the comparison, a signal indicates the pass or fail of the self-test concludes a self-test of the DUT.

A test voltage sample and hold circuitry is disclosed in a readout circuitry of an image sensor. This circuitry samples a voltage at demand value based on a ramp voltage shared by the ADC comparators of the readout circuitry. The value of the sampled voltage is controlled by a control circuitry which is able to predict and calculate at what time a ramp generator may carry the demand voltage value. The sampled voltage is held by a hold capacitor during readout of one row and is accessed during the next row by the control circuitry as test data to drive a device under test (DUT) which may be any portion of the image sensor to be tested. Measured data out of the DUT is compared with expected data. Based on the result of the comparison, a signal indicates the pass or fail of the self-test concludes a self-test of the DUT.

A monitoring apparatus may include a charge plate, a detection sensor, a voltage generator and a controller. The detection sensor may be arranged adjacent to the charge plate to detect a voltage of the charge plate. The voltage generator may be configured to selectively apply a voltage to the charge plate. The controller may be configured to receive and store voltage values and their transmission time transmitted from the detection sensor in generating ions from the ionizer during a monitoring time. The controller may be configured to check a discharge performance of the ionizer based on the voltage values and their respective transmission times.

A monitoring apparatus may include a charge plate, a detection sensor, a voltage generator and a controller. The detection sensor may be arranged adjacent to the charge plate to detect a voltage of the charge plate. The voltage generator may be configured to selectively apply a voltage to the charge plate. The controller may be configured to receive and store voltage values and their transmission time transmitted from the detection sensor in generating ions from the ionizer during a monitoring time. The controller may be configured to check a discharge performance of the ionizer based on the voltage values and their respective transmission times.

The method determining one or more components of a number of components which can be driven in parallel according to power requirements. A wear value of a respective component is ascertained in dependence on ambient conditions, operating states, the supply voltage, and/or the supply current. An optimal number of components to be operated in parallel is ascertained for a current power requirement and is compared with the currently operated number of components. If the number of currently operated components is greater than the optimal number, the component with the greatest wear value is deactivated. If the number of currently operated components is less than the optimal number, the component or components which can be activated in principle are ascertained and then the activatable component with the lowest wear value is activated.

The method determining one or more components of a number of components which can be driven in parallel according to power requirements. A wear value of a respective component is ascertained in dependence on ambient conditions, operating states, the supply voltage, and/or the supply current. An optimal number of components to be operated in parallel is ascertained for a current power requirement and is compared with the currently operated number of components. If the number of currently operated components is greater than the optimal number, the component with the greatest wear value is deactivated. If the number of currently operated components is less than the optimal number, the component or components which can be activated in principle are ascertained and then the activatable component with the lowest wear value is activated.