Patent ID: 11957017
Assignee: SHARP KABUSHIKI KAISHA
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 6:
7. A display device comprising, in a display area, a matrix of subpixels and light-emitting elements, one for each of the subpixels, wherein
the subpixels each including a subpixel circuit provided at an intersection of scan control lines and data signal lines intersecting with the scan control lines,
the subpixel circuit includes a drive transistor, a write transistor, and a capacitor that retains a data signal,
the write transistor includes a conduction terminal connected to an associated one of the data signal lines, another conduction terminal connected to a first as to terminal of the drive transistor, and a control terminal connected to an associated one of the scan control lines,
each of the light-emitting elements includes a first elements electrode, a light-emitting layer, and a second element electrode, the first element electrode being connected to a conduction terminal of the drive transistor,
the drive transistor includes a second gate terminal connected to the second element electrode via a contact hole provided in the display area,
a cathode and a back-gate electrode are electrically connected via the contact hole which is adjacent to an associated one of the light-emitting elements,
the back-gate electrode is configured as the second gate terminal of the drive transistor of each of a plurality of pixel circuits,
the contact hole is provided at one of the subpixels,
the contact hole is provided commonly to an associated plurality of the subpixels,
the plurality of subpixels comprises at least three or more subpixels that emit light of different colors,
the plurality of subpixels comprises a first subpixel that emits light of a first color and a second subpixel that emits light of a second color that differs from the first color, and
gld1>gld2 and k1>k2, where gld1 is a conductance of one of the light-emitting elements in the first subpixel, k1 is a capacitance ratio of the first subpixel, gld2 is a conductance of one of the light-emitting elements in the second subpixel, and k2 is a capacitance ratio of the second subpixel.