Patent ID: 6028441
Filing Date: 2000-02-22
Classification: G09G

Abstract:
A test routine for an LED display device operative with a test fixture, wherein the display device is comprised of a power source, a plurality of LED elements, a control processor disposed for controlling power signals to the LED elements, a switch assembly for selectively controlling the control processor and a signaling element for signaling a state of the display device, and wherein the test fixture is comprised of a microcontroller, a signal sensor, and a switch overlay operative to actuate the switch assembly of the display device, the routine comprising steps of:disposing the switch assembly in a predetermined pattern for controlling the processor to communicate a test pattern of power signals suitable for testing operability of the LED elements;setting a first predetermined time within the test fixture for test completion;communicating the test pattern to the LED elements;monitoring a parameter representative of operability of the LED elements;communicating the parameter to the control processor for comparing the parameter with a predetermined parameter indicative of successful operability of the LED elements;communicating a result signal from the processor to the signaling element representative of a result of the comparing;operating the signaling element in accordance with the result signal;monitoring operation of the signaling element by the test fixture during the first predetermined time; andindicating a test status of the display device.