Patent ID: 7830084
Filing Date: 2010-11-09
Classification: G09G,H01L

Abstract:
1. A display panel including a plurality of pixels, each of the pixels comprising: a light emitting element which emits light in accordance with a driving current; a pixel circuit having a driving transistor connected to the light emitting element in series; a data line to which a data current is supplied through the pixel circuit; a scanning line for selecting the pixel circuit; a first insulation film to cover the data line; and a second insulation film made of a material different from the first insulation film, to cover the data line and the first insulation film, wherein the following expression is satisfied so that a writing ratio, which is a ratio of the driving current to the data current, is larger than 20% at a second luminance gradient and is larger than 90% at a maximum luminance gradient: wherein a first luminance gradient is a gradient such that the light emitting element emits the light at a first brightness luminosity, which is a darkest luminosity other than a no light emitting state, the second luminance gradient is a gradient such that the light emitting element emits the light at a second brightness luminosity, which is a second-darkest luminosity, and the maximum luminance gradient is a gradient such that the light emitting element emits the light at a brightest luminosity, wherein C wherein the driving transistor includes a gate electrode and a semiconductor film, and wherein the first insulation film includes a gate insulation film which is provided between the gate electrode and the semiconductor film and covers the data line.