Patent ID: 8325109
Filing Date: 2012-12-04
Classification: G09G,H01L

Abstract:
1. A display device comprising: a pixel array portion; and a driving portion configured to drive the pixel array portion, the pixel array portion including row scanning lines, column signal lines, and pixels arranged in a matrix form at intersections of the row scanning lines and the column signal lines, the driving portion including at least a write scanner configured to supply a control signal to each of the row scanning lines by sequentially scanning the row scanning lines in each field and a signal selector configured to supply a video signal to each of the column signal lines in synchronization with the sequential row scanning, the pixels each including a storage capacitor, a light-emitting element, a sampling transistor that has a control terminal and a pair of current terminals and is configured to be turned on in response to the control signal, sample the video signal, and store the sampled video signal in the storage capacitor, and a drive transistor that has a control terminal and a pair of current terminals and is configured to supply a driving current to the light-emitting element in accordance with the video signal stored in the storage capacitor, the control terminal of the sampling transistor being connected to one of the row scanning lines, one of the current terminals of the sampling transistor being connected to one of the column signal lines, the other one of the current terminals of the sampling transistor being connected to the control terminal of the drive transistor, one of the current terminals of the drive transistor being connected to a power supply, the other one of the current terminals of the drive transistor being connected to the light-emitting element, the storage capacitor being connected to the control terminal of the drive transistor, and wherein each of the pixels operates in a light-emission period and a non-light-emission period in each field and performs in the non-light-emission period processing for correcting a threshold voltage of the drive transistor, processing for storing the video signal in the storage capacitor, and processing for correcting mobility of the drive transistor, wherein the signal selector supplies not only the video signal but also a predetermined potential to each of the column signal lines so as to turn off the light-emitting element, wherein the write scanner supplies the control signal to each of the row scanning lines such that not only the video signal but also the predetermined potential is supplied from the column signal lines to the pixels, and wherein the sampling transistor obtains the predetermined potential from one of the column signal lines in response to the control signal supplied from the write scanner and applies the obtained predetermined potential to the control terminal of the drive transistor so as to turn off the light-emitting element and switch from the light-emission period to the non-light emission period.