US-12626657-B2 - Display device comprising signal transmission circuits arranged in a staged manner

US12626657B2US 12626657 B2US12626657 B2US 12626657B2US-12626657-B2

Abstract

A display device that limits visibility of a streak is disclosed. In one example, a display device includes a pixel array, signal lines, and a driver. In the pixel array, a pixels with a light emitting element are arranged in a two-dimensional array along a first direction and a second direction. The signal lines extend along the first direction. The driver includes n (n>2) staged signal transmission units that supply signals to the signal lines and that are arranged along the first direction. A first signal transmission unit arranged at an m-th stage (m1<=m<n) is electrically connectable to a first signal line. A second signal line adjacent to the first signal line is electrically connected to the first signal transmission unit or a second signal transmission unit arranged at an (m−1)th stage (m−1>=1) or an (m+1)th stage (m+1<=n).

Inventors

Takayuki Sakaguchi

Assignees

SONY SEMICONDUCTOR SOLUTIONS CORPORATION

Dates

Publication Date: 20260512
Application Date: 20230202
Priority Date: 20220323

Claims (18)

1 . A display device comprising: a pixel array including a plurality of pixels arranged in a two-dimensional array along a first direction and a second direction that is a direction intersecting the first direction, each of the pixels respectively including a light emitting element; a plurality of signal lines extending in the first direction, the plurality of signal lines including a first signal line and a second signal line; and a driver in which a plurality of signal transmission circuits configured to supply signals to the plurality of signal lines is arranged, the plurality of signal transmission circuits including a first signal transmission circuit and a second signal transmission circuit, wherein n pieces (n is any integer satisfying n>2) of the plurality of signal transmission circuits are arranged in a staged manner along the first direction, the first signal transmission circuit is arranged at an m-th stage (m is any integer satisfying 1<=m<n) and is configured to be electrically connectable to the first signal line, the second signal line is adjacent to the first signal line and is electrically connected to the first signal transmission circuit, or the second signal transmission circuit, the second signal transmission circuit being arranged at an (m−1)th stage (m−1>=1) or an (m+1)th stage (m+1<=n), and a resistance difference between a connection between the first signal transmission circuit and the pixel array and a connection between an n-th signal transmission circuit and the pixel array is larger than a resistance difference in a combination of connections between any two of the plurality of signal transmission circuits other than the first signal transmission circuit and the pixel array.
2 . The display device according to claim 1 , wherein the signal lines are configured to propagate signals for driving the light emitting elements.
3 . The display device according to claim 2 , wherein each of the pixels respectively includes: a capacitor; a write transistor configured to sample a data voltage supplied to a data line as a respective signal line of the plurality of signal lines, and to supply the data voltage to the capacitor; and a drive transistor configured to supply a current corresponding to a voltage accumulated in the capacitor to the light emitting element.
4 . The display device according to claim 2 , wherein each of the pixels respectively includes: a capacitor; a write transistor configured to sample a data voltage supplied to a data line according to a control signal supplied to a first control line as a respective signal line of the plurality of signal lines, and to supply the data voltage to the capacitor; and a drive transistor configured to supply a current corresponding to a voltage accumulated in the capacitor to the light emitting element.
5 . The display device according to claim 2 , wherein each of the pixels respectively includes: a capacitor; a write transistor configured to sample a data voltage supplied to a data line and supply the data voltage to the capacitor; a drive transistor configured to supply a current corresponding to a voltage accumulated in the capacitor to the light emitting element; and a first reset transistor configured to supply a predetermined voltage to an anode of the light emitting element according to a control signal supplied to a second control line as the signal line.
6 . The display device according to claim 2 , wherein each of the pixels respectively includes: a capacitor; a write transistor configured to sample a data voltage supplied to a data line and supply the data voltage to the capacitor; a drive transistor configured to supply a current corresponding to a voltage accumulated in the capacitor to the light emitting element; and a light emission control transistor that is connected in series with the light emitting element and the drive transistor, and is configured to be turned on and off according to a control signal supplied to a third control line as the signal line.
7 . The display device according to claim 2 , wherein each of the pixels respectively includes: a capacitor; a write transistor configured to sample a data voltage supplied to a data line and supply the data voltage to the capacitor; a drive transistor configured to supply a current corresponding to a voltage accumulated in the capacitor to the light emitting element; and a second reset transistor that is connected between a gate and a drain of the drive transistor, and is configured to be turned on and off according to a control signal supplied to a fourth control line as the signal line.
8 . The display device according to claim 2 , wherein the plurality of signal lines is electrically connected directly to one of the plurality of signal transmission circuits.
9 . The display device according to claim 2 , wherein the driver includes a selector, and the plurality of signal lines is provided to be electrically connectable to the plurality of signal transmission circuits via the selector.
10 . The display device according to claim 1 , wherein the plurality of signal transmission circuits includes a first stage, a second stage, an m-th stage, and an n-th stage in descending order of distance from the pixel array.
11 . A display device comprising: a pixel array including a plurality of pixels arranged in a two-dimensional array along a first direction and a second direction that is a direction intersecting the first direction, each of the pixels respectively including a light emitting element; a plurality of signal lines extending in the first direction, the plurality of signal lines including a first signal line and a second signal line; and a driver in which a plurality of signal transmission circuits configured to supply signals to the plurality of signal lines is arranged, the plurality of signal transmission circuits including a first signal transmission circuit and a second signal transmission circuit, wherein n pieces (n is any integer satisfying n>2) of the plurality of signal transmission circuits are arranged in a staged manner along the first direction, the first signal transmission circuit is arranged at a first stage and is configured to be electrically connectable to the first signal line, the second signal line is adjacent to the first signal line and is electrically connected to the first signal transmission circuit or the second signal transmission circuit, the second signal transmission circuit being arranged at an m-th stage (m is any integer satisfying 1<m<n), and a resistance difference between a connection between the first signal transmission circuit and the pixel array and a connection between an n-th signal transmission circuit and the pixel array is larger than a resistance difference in a combination of connections between any two of the plurality of signal transmission circuits other than the first signal transmission circuit and the pixel array.
12 . The display device according to claim 11 , wherein the plurality of signal transmission circuits includes a first stage, a second stage, an m-th stage, and an n-th stage in descending order of distance from the pixel array.
13 . A display device comprising: a pixel array including a plurality of pixels arranged in a two-dimensional array along a first direction and a second direction that is a direction intersecting the first direction, each of the pixels respectively including a light emitting element; a plurality of signal lines extending in the first direction, the plurality of signal lines including a first signal line and a second signal line; and a driver in which a plurality of signal transmission circuits configured to supply signals to the plurality of signal lines is arranged, the plurality of signal transmission circuits including a first signal transmission circuit and a second signal transmission circuit, wherein n pieces (n is any integer satisfying n>2) of the plurality of signal transmission circuits are arranged in a staged manner along the first direction, the first signal transmission circuit is arranged at an m-th stage (m is any integer satisfying 1≤m<n) and is configured to be electrically connectable to the first signal line, the second signal line is adjacent to the first signal line and is electrically connected to the first signal transmission circuit or the second signal transmission circuit, the second signal transmission circuit being arranged at an (m−1)th stage (m−1≥1) or an (m+1)th stage (m+1≤n), and a parasitic capacitance difference between a connection between the first signal transmission circuit and the pixel array and a connection between an n-th signal transmission circuit and the pixel array is larger than a parasitic capacitance difference in a combination of connections between any two of the plurality of signal transmission circuits other than the first signal transmission circuit and the pixel array.
14 . A display device comprising: a pixel array including a plurality of pixels arranged in a two-dimensional array along a first direction and a second direction that is a direction intersecting the first direction, each of the pixels respectively including a light emitting element; a plurality of signal lines extending in the first direction, the plurality of signal lines including a first signal line and a second signal line; and a driver in which a plurality of signal transmission circuits configured to supply signals to the plurality of signal lines is arranged, the plurality of signal transmission circuits including a first signal transmission circuit and a second signal transmission circuit, wherein n pieces (n is any integer satisfying n>2) of the plurality of signal transmission circuits are arranged in a staged manner along the first direction, the first signal transmission circuit is arranged at a first stage and is configured to be electrically connectable to the first signal line, the second signal line is adjacent to the first signal line and is electrically connected to the first signal transmission circuit or the second signal transmission circuit, the second signal transmission circuit being arranged at an m-th stage (m is any integer satisfying 1<m<n), and a parasitic capacitance difference between a connection between the first signal transmission circuit and the pixel array and a connection between an n-th signal transmission circuit and the pixel array is larger than a parasitic capacitance difference in a combination of connections between any two of the plurality of signal transmission circuits other than the first signal transmission circuit and the pixel array.
15 . The display device according to claim 1 , wherein the pixel array comprises a first region with pixels arranged along the first direction, and a second region with pixels arranged along the first direction, the second region being adjacent to the first region along the second direction.
16 . The display device according to claim 15 , wherein the plurality of signal lines comprise a plurality of first signal lines extending in the first direction in the first region, and a plurality of second signal lines extending in the first direction in the second region.
17 . The display device according to claim 16 , wherein the plurality of first signal lines are connected, from a first side to a second side in the second direction, in order from the first signal transmission circuit to the n-th signal transmission circuit.
18 . The display device according to claim 16 , wherein the plurality of second signal lines are connected, from a first side to a second side in the second direction, in order from the n-th signal transmission circuit to the first signal transmission circuit.

Description

TECHNICAL FIELD The present disclosure relates to a display device. BACKGROUND ART In a display device, a method of applying, as a signal for causing pixels to emit light, an image signal by designating a position in a horizontal direction and a position in a vertical direction is widely used. The designation of the position in the horizontal direction and the position in the vertical direction are realized using a driver that designates the position in the horizontal direction and a driver that designates the position in the vertical direction. As an example, a line for transmitting a signal is designated, and a signal corresponding to a pixel value is input for each column in this line, thereby displaying desired images, shadow images, and the like. The signal lines for transmitting signals are mounted in a semiconductor chip, for example. In this implementation, for example, a plurality of drivers for designation in the horizontal direction may be provided due to a problem of layout and the like. In this case, furthermore, the columns may be individually connected to the drivers arranged at different distances from the pixel array in order of increasing distance. For example, in a case where the drivers are arranged in a four-stage configuration, the first column is connected to the driver at the first stage, the second column is connected to the driver at the second stage, the third column is connected to the driver at the third stage, the fourth column is connected to the driver at the fourth stage, and the fifth and subsequent columns are connected in turn from the first stage. However, such implementation has a problem where the longer the distance from the signal line to the driver, the more the signal is degraded. When the drivers connected to the respective columns are sequentially arranged, in the above example, a difference arises between a signal transmitted over a long distance to the fourth column and a signal transmitted over a short distance to the fifth column, and there is a problem that a vertical streak appears on the display due to the difference in characteristics, such as the degrees of strength of the signals. CITATION LIST Patent Document Patent Document 1: Japanese Patent Application Laid-Open No. 2010-237358 SUMMARY OF THE INVENTION Problems to be Solved by the Invention Therefore, the present disclosure provides a display device that reduces the visibility of a streak in a driver having a laminated structure. Solutions to Problems According to an embodiment, a display device includes a pixel array, a plurality of signal lines, and a driver. In the pixel array, a plurality of pixels each having a light emitting element is arranged in a two-dimensional array along a first direction and a second direction that is a direction intersecting the first direction. The plurality of signal lines extends along the first direction. The driver includes a plurality of signal transmission units configured to supply signals to the plurality of signal lines. N pieces (n is any integer satisfying n>2) of the plurality of signal transmission units are arranged in a staged manner along the first direction. A first signal transmission unit arranged at an m-th stage (m is any integer satisfying 1<=m<n) among the plurality of signal transmission units is provided to be electrically connectable to a first signal line among the plurality of signal lines. A second signal line adjacent to the first signal line among the plurality of signal lines is electrically connected to, among the plurality of signal transmission units, the first signal transmission unit or a second signal transmission unit arranged at an (m−1)th stage (m−1>=1) or an (m+1)th stage (m+1<=n). According to an embodiment, a display device includes a pixel array, a plurality of signal lines, and a driver. In the pixel array, a plurality of pixels each having a light emitting element is arranged in a two-dimensional array along a first direction and a second direction that is a direction intersecting the first direction. The plurality of signal lines extends along the first direction. The driver includes a plurality of signal transmission units configured to supply signals to the plurality of signal lines. N pieces (n is any integer satisfying n>2) of the plurality of signal transmission units are arranged in a staged manner along the first direction. A first signal transmission unit arranged at a first stage among the plurality of signal transmission units is provided to be electrically connectable to a first signal line among the plurality of signal lines. A second signal line adjacent to the first signal line among the plurality of signal lines is electrically connected to, among the plurality of signal transmission units, the first signal transmission unit or a second signal transmission unit arranged at an m-th stage (m is any integer satisfying 1<m<n) The signal lines may be configured to propagate signals for driving the light emittin