Device substrate
An element-side substrate includes an element array area, an RGB switch circuit, and a source driver IC. The center of a terminal group coupled to video signal lines of the source driver IC is shifted (displaced) by a distance “g” leftward from the center of the RGB switch circuit, thereby making it possible to lengthen portions of bent left video signal lines that extend in the top-bottom direction while shortening portions of bent right video signal lines that extend in the top-bottom direction. As a result, it is possible to shorten a distance “h” between the source driver IC and the RGB switch circuit while fully avoiding interference with a large area occupied by left control lines and also avoiding interference with a small area occupied by right control lines.
1. A device substrate including a plurality of elements located thereon, comprising:
an element array section including a plurality of elements arranged in a matrix so as to define pluralities of rows and columns, and a first control circuit configured to control driving of the plurality of elements;
a second control circuit contained entirely within an integrated circuit chip and configured to control driving of the plurality of elements, the integrated circuit chip having a long side shorter than a circumferential side of the element array section and being arranged with the long side approximately parallel to the circumferential side at a predetermined distance;
a plurality of element lines, each comprising a first segment and a second segment, positioned between the first control circuit and the second control circuit and arranged to connect the first control circuit to a plurality of first terminals configured to transmit signals from the second control circuit to the first control circuit to be provided to the elements, the plurality of first terminals are located within the integrated circuit chip at a center of the long side; and
a plurality of control lines including a first group of control lines arranged between the first control circuit and the second control circuit to connect connecting the first control circuit to a plurality of second terminals configured to transmit signals from the second control circuit to the first control circuit to control driving of the plurality of elements, the plurality of second terminals are located within the integrated circuit chip at a lateral end of the long side, wherein,
the element lines are bent at a point where the first and second segments connect so as not to interfere with areas occupied by the plurality of control lines, and
the second control circuit is arranged such that the center of the long side is displaced a predetermined distance from a position corresponding to a center of the circumferential side toward one of two lateral ends of the long side that includes more of the plurality of second terminals.
2. The device substrate according to claim 1 , wherein,
the bent lines include:
first segments extending from the first terminals and configured to bend so as to have a first angle with respect to the long side; and
second segments extending from the bends to the element array section so as to have a second angle with respect to the long side, and
the first segments arranged on a displacement direction side with respect to the center of the corresponding portion of the long side have a greater average or maximum length than the first segments arranged on a side opposite to the displacement direction side with respect to the center of the corresponding portion of the long side.
3. The device substrate according to claim 1 , wherein the element lines arranged farthest in a direction opposite to a displacement direction with respect to the center of the corresponding portion of the long side are not bent to avoid interference with their surroundings.
4. The device substrate according to claim 1 , wherein the second control circuit includes more of the plurality of second terminals connected to the control lines on a displacement direction side with respect to the center of the corresponding portion of the long side than on a side opposite to the displacement direction side.
5. The device substrate according to claim 1 , wherein sections of the control lines that are vertical to the long side of the second control circuit are longer in the occupied area on a displacement direction side with respect to the center of the corresponding portion of the long side than in the occupied area on a side opposite to the displacement direction side.
6. The device substrate according to claim 1 , wherein,
the element array section further includes a third control circuit configured to control rows or columns of elements to be driven on a predetermined basis of one by one or more in a direction vertical to an array direction of the elements controlled by the first or second control circuit, and
the third control circuit is provided close to a circumferential side of the element array section on a displacement direction side, and is connected at least one of the control lines.
7. The device substrate according to claim 1 , wherein,
the element array section includes a plurality of display elements provided as the plurality of elements and including pixel circuits configured to display pixels included in an image,
the first control circuit includes a column control circuit configured to control driving of the display elements by dividing the columns into groups of two or more and outputting signals to be provided to the groups such that the groups are sequentially switched by time division within a predetermined period of time,
the second control circuit is a source driver circuit configured to provide video signals received from outside the substrate to the column control circuit such that the video signals are supplied to display elements to provide display corresponding to the signals, and
the element lines connect the column control circuit to the source driver circuit.
8. The device substrate according to claim 6 , wherein
the plurality of control lines further include a second group of control lines arranged between the third control circuit and the second control circuit to connect the third control circuit to third terminals configured to transmit signals from the second control circuit to the third control circuit to control driving of the elements, the third terminals are located within the integrated circuit chip at only one lateral end of the long side, and
a direction in which the second control circuit is displaced the predetermined distance from the position corresponding to the center of the circumferential side is towards the only one lateral end of the long side where the third terminals are located.
9. The device substrate according to claim 2 , wherein the first angles of all of the bent lines are the same and the second angles of all of the bent lines are the same.
10. The device substrate according to claim 2 , wherein the first angle is 90 degrees.