Drive circuit array substrate including well taps provided in subset thereof, display device, and electronic apparatus
地域：
Tokyo
摘要
A display device according to the present disclosure includes: a drive circuit array substrate including drive circuits arranged in an array pattern on a semiconductor substrate; and light emitting elements arranged in an array pattern over the drive circuits and driven by the drive circuits, in which in a drive circuit group including a plurality of the drive circuits that are adjacent to each other, a well tap is provided in a part of the drive circuits of the plurality of the drive circuits included in the drive circuit group.
說明書
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The present disclosure relates to a drive circuit array substrate, a display device, and an electronic apparatus.
A display device, including a drive circuit array substrate in which drive circuits including transistors are arranged in a matrix pattern and light emitting elements arranged in an array pattern over the drive circuit array substrate, is known. For example, a compact, high-definition self-luminous display, in which drive circuits are formed on a silicon substrate and light emitting elements each including an organic light emitting layer are arranged over the drive circuits, is called a micro organic light emitting diode (M-OLED) display.
The M-OLED display has features such as high brightness, high definition, and small volume. Therefore, applications to electronic viewfinders for digital cameras, optical engines for head mounted displays, and the like are progressing. As a circuit for driving a light emitting element, a drive circuit including transistors and capacitors is well known (see, e.g., Patent Literature 1).
- Patent Literature 1: JP 2015-187672 A
權(quán)利要求
The invention claimed is:1. A drive circuit array substrate comprising drive circuits arranged in an array pattern on a semiconductor substrate, whereinin a drive circuit group including a plurality of the drive circuits that are adjacent to each other, a well tap is provided in only a subset of the plurality of the drive circuits included in the drive circuit group. 2. The drive circuit array substrate according to claim 1 , whereinin the plurality of the drive circuits included in the drive circuit group, a transistor constituting a predetermined drive circuit is configured to have a larger size than transistors of the other drive circuits. 3. The drive circuit array substrate according to claim 2 , whereina transistor for supplying a current, of the transistors constituting the predetermined drive circuit, is configured to have a larger size. 4. The drive circuit array substrate according to claim 2 , whereinin the subset of the plurality of the drive circuits, the well tap is provided in the predetermined drive circuit. 5. The drive circuit array substrate according to claim 2 , whereinthe drive circuit group includes a first drive circuit, a second drive circuit, and a third drive circuit, the second drive circuit is arranged to be sandwiched by the first drive circuit and the third drive circuit, in the subset of the plurality of the drive circuits, the well tap is provided in the second drive circuit, and a transistor constituting the second drive circuit is configured to have a larger size than transistors of the first drive circuit and the third drive circuit. 6. The drive circuit array substrate according to claim 5 , whereinin the drive circuit group, the third drive circuit has a circuit arrangement in which the first drive circuit is vertically and horizontally inverted. 7. The drive circuit array substrate according to claim 5 , whereina pair of the drive circuit groups, adjacent to each other and side by side in a longitudinal direction of the drive circuit, are arranged to form a repeating unit. 8. The drive circuit array substrate according to claim 7 , whereinthe first drive circuit and the third drive circuit belonging to one drive circuit group of the pair of the drive circuit groups have circuit arrangements in which the first drive circuit and the third drive circuit belonging to an other drive circuit group are vertically inverted, respectively. 9. The drive circuit array substrate according to claim 8 , whereinthe second drive circuit belonging to the one drive circuit group of the pair of the drive circuit groups has a circuit arrangement in which the second drive circuit belonging to the other drive circuit group is horizontally inverted, or a circuit arrangement in which the second drive circuit belonging to the other drive circuit group is vertically and horizontally inverted. 10. The drive circuit array substrate according to claim 5 , whereinthe drive circuit group further includes a fourth drive circuit. 11. The drive circuit array substrate according to claim 2 , whereinthe respective drive circuits are arranged in a stripe pattern. 12. A display device comprising:a drive circuit array substrate including drive circuits arranged in an array pattern on a semiconductor substrate; and light emitting elements arranged in an array pattern over the drive circuits and driven by the drive circuits, wherein in a drive circuit group including a plurality of the drive circuits that are adjacent to each other, a well tap is provided in only a subset of the plurality of the drive circuits included in the drive circuit group. 13. The display device according to claim 12 , whereinin the plurality of the drive circuits included in the drive circuit group, a transistor constituting a predetermined drive circuit is configured to have a larger size than transistors of the other drive circuits. 14. The display device according to claim 13 , whereinin the plurality of the drive circuits included in the drive circuit group, a transistor for supplying a current, of the transistors constituting the predetermined drive circuit, is configured to have a larger size. 15. The display device according to claim 13 , whereinin the subset of the plurality of the drive circuits, the well tap is provided in a predetermined drive circuit. 16. The display device according to claim 13 , whereinthe drive circuit group includes a first drive circuit, a second drive circuit, and a third drive circuit, the second drive circuit is arranged to be sandwiched by the first drive circuit and the third drive circuit, in the subset of the plurality of the drive circuits, the well tap is provided in the second drive circuit, a transistor constituting the second drive circuit is configured to have a larger size than transistors of the first drive circuit and the third drive circuit, the first drive circuit and the third drive circuit are connected to a light emitting element corresponding to a red pixel and a light emitting element corresponding to a blue pixel, respectively, and the second drive circuit is connected to a light emitting element corresponding to a green pixel. 17. The display device according to claim 16 , whereinthe drive circuit group further includes a fourth drive circuit connected to a light emitting element corresponding to a white pixel. 18. The display device according to claim 12 , whereinthe respective light emitting elements are arranged in a stripe array, a mosaic array, a square array, or a delta array. 19. The display device according to claim 12 , whereinthe light emitting element includes an organic electroluminescence element. 20. An electronic apparatus comprising a display device including:a drive circuit array substrate including drive circuits arranged in an array pattern on a semiconductor substrate; and light emitting elements arranged in an array pattern over the drive circuits and driven by the drive circuits, wherein in a drive circuit group including a plurality of the drive circuits that are adjacent to each other, a well tap is provided in only a subset of the plurality of the drive circuits included in the drive circuit group.
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