Patent ID: 7317400

Claim:
A self light emitting type display module comprising a light emitting display panel in which a plurality of pixels containing a self light emission element having diode characteristic is arranged at each intersection between a scanning line and a data line in matrix configuration, a self light emitting display unit comprising drive means for driving each self light emitting element on the light emitting display panel selectively and fault detecting means for detecting a fault in the self light emitting display unit, wherein the fault detecting means includes: reverse bias voltage applying means for applying reverse bias voltage to a cathode side of the element when the self light emitting element is in non light emitting state; current amplifying means for amplifying current flowing to the self light emitting element when the reverse bias voltage is applied to the cathode side of the self light emitting element; and current value detecting means for detecting a fault in the self light emitting display unit by determining whether or not current value amplified by the current amplifying means is equal to or more than a predetermined value, and the current amplifying means is constituted of a current mirror circuit set to a predetermined current ratio (1:n, where n≧1) between a control side current source transistor and a controlled side current source transistor and current generated when reverse bias voltage is applied to the cathode side of the self light emitting element is supplied to the control side current source transistor while current flowing to the controlled side current source transistor is supplied to the current value detecting means.