Patent ID: 8154566

Claim:
An electronic instrument comprising: main unit means; and display means for displaying information supplied to said main unit means and information output by said main unit means, wherein said display means is provided with scan lines, signal lines, and pixel circuits, said scan lines, said signal lines, and said pixel circuits are laid out to form a two-dimensional matrix of a pixel array section, said scan lines each forming a row of said two-dimensional matrix are each used for supplying a control signal to said pixel circuits, said signal lines each forming a column of said two-dimensional matrix are each used for supplying a video signal to said pixel circuits, each of said pixel circuits is located at the intersection of one of said scan lines and one of said signal lines, said scan lines, said signal lines and said pixel circuits are formed on a substrate, each of said pixel circuits has a signal sampling transistor for sampling said video signal with a timing determined by said control signal, a device driving transistor for generating a driving current with a magnitude according to said video signal sampled by said signal sampling transistor, a signal holding capacitor for storing said video signal sampled by said signal sampling transistor, a light emitting device for receiving said driving current from said device driving transistor and emitting light at a luminance level according to said driving current which is determined by said video signal sampled by said signal sampling transistor, said light emitting device is a thin-film device having two terminals serving as a pair of electrodes which are referred to as an anode and a cathode, said light emitting device also includes a light emitting layer which is sandwiched by said anode and said cathode, at least one of said two electrodes are divided into N portions so that said light emitting device is virtually divided into N light emitting sub-devices, said N light emitting sub-devices receive said driving current from said device driving transistor and, as a whole, emit light at a luminance level according to said driving current which is determined by said video signal sampled by said signal sampling transistor, and if any particular one of said N light emitting sub-devices pertaining to any specific one of said pixel circuits is defective, said particular light emitting sub-device is electrically disconnected from said specific pixel circuit and the magnitude of said driving current supplied to said (N−1) remaining light emitting sub-devices pertaining to said specific pixel circuit is adjusted so that said (N−1) remaining light emitting sub-devices receive a driving current from said device driving transistor with a magnitude suppressed to a value equal to ((N−1)/N) times the magnitude of a driving current which is supplied to a normal pixel circuit not including a defective light emitting sub-device.