JP4201041B2 - Active matrix circuit board and display device - Google Patents

Description

  The present invention relates to an active matrix circuit substrate including a drive electrode and a wiring pattern, and a display device including the active matrix circuit substrate.

In recent years, with the widespread use of various display panels (displays) composed of electro-optical devices, it has been studied to use the display panels for display units such as watches and various instruments.
Thus, as a display panel (display device) used as a display unit of a clock or various instruments, for example, a pointer for indicating time on a clock or indicating a scale (numerical value) on a gauge is attached. Some need to form holes. As a display panel in which a through hole is formed, a liquid crystal display panel based on STN liquid crystal that is driven by a passive matrix has been proposed (see, for example, Patent Document 1).
JP 2001-75112 A

  By the way, even in a display panel (display device) used for a clock or the like, not only displays a number indicating a time, but also calendar information such as “date” and “day of the week”, and also a device such as a clock. Since various types of attached functions (timer function, stopwatch function, radio wave reception function, etc.) are also displayed, there is a demand for display using active matrix driving instead of passive matrix driving.

  However, in order to perform active matrix driving, it is necessary to arrange wiring such as data lines and scan lines vertically and horizontally. As described above, when a through-hole is formed in an active matrix circuit board that is a component of a display panel by a drill or the like, a data line and a scan line at the opening position are damaged. For example, when a display panel using this active matrix circuit board is a rectangular screen, display is performed in a cross-shaped part including a through hole, that is, a display part by a pixel electrode connected to a wiring passing through the through hole by design. It will not be done. For this reason, in a matrix display body having a through hole, it is necessary to detour a wiring portion passing through the through hole in order to avoid the through hole with respect to the wiring passing through the through hole by design.

  In addition, in the above-mentioned patent document 1, in order to use together with an analog indicator instrument, in the liquid crystal display panel having a through hole in the display unit, the axis of the through hole is formed in the X electrode and the Y electrode that are wired around the through hole. By forming each arc-shaped electrode part with a predetermined curvature centering on the center, high-density wiring is possible by effectively using the space around the through hole, and a unique display is provided around the through hole It is described that a liquid crystal display panel that can perform the above is provided. However, this Patent Document 1 does not consider the active matrix driving by the TFT panel at all, and therefore cannot satisfy the above-mentioned demand for display by the active matrix driving.

  As described above, in an active matrix high-definition display device, data lines (signal lines), scan lines (scan lines), etc. need to be bypassed in order to avoid through holes. In order to arrange the wiring by bypassing the hole, it becomes impossible to provide a pixel driving circuit for driving the pixel electrode at the position where the wiring is formed. In particular, when the resolution is high, the number of wirings to be detoured becomes very large, and the area for forming the pixel driving circuit is further limited accordingly. As a result, display cannot be performed around the through-hole, and therefore the entire display area is reduced.

In order to avoid such an inconvenience, it is conceivable to provide a margin for the arrangement of the pixel driving circuits by reducing the definition and to secure a space between the pixel driving circuits so that wiring is passed through the space. .
In addition, by increasing the number of layers for forming the wiring and forming the wiring in different layers so as not to buffer each other, an area for forming the pixel driving circuit is also secured in the vicinity of the through hole, thereby enabling the display. It is also conceivable to provide the pixel electrode in the vicinity of the through hole.

However, lowering the definition will lower the display quality, and even if the display area expands to the periphery of the through-hole and a large display area is secured, it will not be possible to obtain a high-quality feeling as a product. End up.
Further, when the number of layers for forming the wiring is increased, the number of processes is increased correspondingly, and the manufacturing cost is significantly increased.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an active matrix drive display that ensures a large display area without degrading display quality and without causing a significant increase in manufacturing cost. It is an object of the present invention to provide an apparatus and an active matrix circuit board as a component of the apparatus.

In order to achieve the above object, an active matrix circuit substrate of the present invention includes a pixel electrode, a pixel driving circuit for driving the pixel electrode, and a wiring connected to the pixel electrode circuit. A matrix circuit board,
An avoidance unit that avoids the wiring in a region corresponding to a display region of the display device, and a wiring having a bypass wiring unit that avoids the avoidance unit,
Surrounding pixel electrodes positioned around the avoiding portion are formed larger than other pixel electrodes, and the surrounding pixel electrodes are formed in a shape extending to the avoiding portion side,
The detour wiring portion is arranged directly below the surrounding pixel electrode.
In addition, a hole is specifically mentioned as an avoidance part.

  According to this active matrix circuit board, since the wiring having the bypass wiring portion that avoids the avoidance portion is provided, it is possible to avoid the inconvenience that the display by the pixel electrode connected to the wiring is not performed. In addition, the surrounding pixel electrode positioned around the avoiding portion is formed larger than the other pixel electrodes, and the surrounding pixel electrode is formed in a shape extending to the avoiding portion side. The display area in the vicinity of the avoidance portion can be expanded by extending the pixel electrode toward the avoidance portion. Furthermore, since the bypass wiring portion is disposed immediately below the surrounding pixel electrodes, it is possible to avoid the inconvenience that the pixel drive circuit cannot be disposed by the bypass wiring portion. Therefore, it is possible to easily cope with a particularly high resolution (high definition) circuit having a very large number of lines to be bypassed without any trouble.

In the active matrix circuit substrate, a plurality of surrounding pixel electrodes may be provided, and one pixel driving circuit may be provided for each of the surrounding pixel electrodes.
Since a plurality of surrounding pixel electrodes are provided, display in the vicinity of the avoidance portion by these surrounding pixel electrodes can be performed with high definition.

In the active matrix circuit substrate, a plurality of the surrounding pixel electrodes may be provided, and a plurality of pixel driving circuits may be provided for each of the surrounding pixel electrodes.
Since a plurality of surrounding pixel electrodes are provided, display in the vicinity of the avoidance portion by these surrounding pixel electrodes can be performed with high definition.
In addition, since one peripheral pixel electrode can be driven by a plurality of pixel driving circuits, the same operation is performed in the plurality of pixel driving circuits, and the plurality of pixel driving circuits are driven in cooperation, for example, An electric field equivalent to that of the other pixel electrodes can be generated with respect to the surrounding pixel electrodes formed larger than the other pixel electrodes.

In the active matrix circuit substrate, only one peripheral pixel electrode may be provided, and a plurality of pixel drive circuits may be provided corresponding to the peripheral pixel electrode.
Since one peripheral pixel electrode can be driven by a plurality of pixel driving circuits, the same operation is performed in the plurality of pixel driving circuits, and the plurality of pixel driving circuits are cooperatively driven, for example, other pixels. An electric field equivalent to that of the other pixel electrodes can be generated for the surrounding pixel electrodes formed larger than the electrodes.

In the active matrix circuit board, the avoidance portion may be entirely formed in a region corresponding to the display region of the display device.
In this way, since the area of the avoidance portion occupying the display area is increased, the effect of expanding the display area in the vicinity of the avoidance portion is enhanced.

In the active matrix circuit board, only a part of the avoidance portion may be formed in a region corresponding to the display region of the display device.
In this way, it is possible to deal with a display device having a relatively small display area. Therefore, application to a display device that extends the battery life by narrowing the display area and suppressing power consumption is facilitated.

The display device of the present invention includes a first substrate in which a pixel electrode is provided on the inner surface side, a second substrate in which a counter electrode is provided on the inner surface side, and between the first substrate and the second substrate. And an electro-optical material sandwiched between the first substrate and the first substrate, wherein the first substrate is the active matrix circuit substrate.
According to this display device, the display area in the vicinity of the avoidance portion can be expanded by avoiding the inconvenience that the display by a part of the pixel electrodes is not made as described above, and the pixel drive is performed by the bypass wiring. Since the first substrate made of an active matrix circuit board that avoids the inconvenience that the circuit cannot be disposed is provided, the display cost is not lowered and the number of wiring layers is not increased, so that the manufacturing cost is significantly increased. Therefore, a large display area is secured.

In the display device, the electro-optical material is preferably an electrophoretic dispersion liquid including electrophoretic particles and a liquid phase dispersion medium in which the electrophoretic particles are dispersed.
In this way, since the electrophoretic elements constituting the display device have display retention (memory property), for example, when the display is fixed, the electric field applied to the electrophoretic particles is eliminated. However, the display is maintained in a state due to the electric field previously applied. Therefore, power consumption can be reduced.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view of a wristwatch 1 having a display panel 5 which is an embodiment of the display device of the present invention, and FIG. 2 is a side sectional view of the wristwatch 1.
As shown in FIG. 1, the wristwatch 1 includes a watch case 2 and a pair of bands 3 connected to the watch case 2. The watch case 2 is formed of a metal material such as stainless steel or a resin material such as plastic resin. As shown in FIG. 2, the movement 4 and the display panel 5 are accommodated in the accommodating portion 2A. Yes.

  A transparent cover 7 made of glass or resin is press-fitted and fixed to one end side (the front side of the timepiece) of the accommodating portion 2 </ b> A of the watch case 2 through a press-fit ring 6 made of resin or metal. Further, a back cover 9 is screwed to the other end side (watch back side) of the accommodating portion 2 </ b> A via a packing 8. Based on such a configuration, the inside of the watch case 2 is secured by the back cover 9 and the transparent cover 7.

Further, as shown in FIG. 1, the watch case 2 is provided with a crown 10 as an operation element and an operation button 11. The crown 10 is connected to a winding stem (not shown) of the movement 4, and is provided so as to be integrated with the winding stem so that it can be pushed and pulled in multiple stages (for example, two stages) and is rotatable.
The movement 4 is provided with a hand movement mechanism (not shown) to which an analog pointer consisting of a second hand 21, a minute hand 22 and an hour hand 23 is connected, and this hand movement mechanism rotationally drives the analog hands 21 to 23, It functions as a time display unit that displays the set time.

  As shown in FIG. 2, the display panel 5 is disposed on the front side of the timepiece of the movement 4 and forms a display portion of the wristwatch 1. This display panel 5 is an electrophoretic display panel driven by an active matrix in this embodiment, and has, for example, a circular, regular octagonal, or hexagonal display surface. The display panel 5 is formed with a through hole 5A at the center thereof, from which the second wheel 24, the second wheel 25 and the hour wheel of the hand movement mechanism (not shown) of the movement 4 are provided. Each shaft of 26 protrudes, and a second hand 21, a minute hand 22 and an hour hand 23 are attached to the tip of this shaft.

As shown in FIG. 3, the display panel 5 includes a first substrate 30, a second substrate 31, and an electrophoretic layer 32 provided between the substrates 30 and 31.
As will be described later, the first substrate 30 is an embodiment of an active matrix circuit substrate according to the present invention. As shown in FIG. 4, a large number of pixel drive circuits 34 are arranged on the inner surface side of the glass substrate 33. Further, the pixel electrode 35 is disposed on the pixel driving circuit 34.
The second substrate 31 is on the display surface side of the display panel 5 and has a transparent common electrode (counter electrode) made of ITO or the like on the inner surface of the transparent substrate 36 made of glass or plastic as shown in FIG. 37 is formed.

  As shown in FIGS. 5A and 5B, the electrophoretic layer 32 includes a large number of microcapsules 24, and the electrophoretic dispersion liquid 25 is sealed in each of the microcapsules 24. The electrophoretic dispersion liquid 25 is an electro-optical material in the present invention, and is positively charged black electrophoretic particles (hereinafter referred to as black particles) 26 and negatively charged white electrophoretic particles (hereinafter referred to as black electrophoretic particles). A large number of white particles 27) are dispersed in a liquid phase dispersion medium (not shown).

  Here, the operation of the electrophoretic element 28 including the pixel electrode 35, the common electrode 37, and the electrophoretic layer 32 (microcapsule 24) sandwiched between these electrodes will be described. FIG. As shown, when the potential of the common electrode 37 is relatively higher than the potential of the pixel electrode 35, the negatively charged white particles 27 move (migrate) to the common electrode 37 side, and the positively charged black particles 26 Move (migrate) to the pixel electrode 35 side. As a result, when the common electrode 37 side which is the display surface side is viewed in this state, white is recognized in the pixel portion corresponding to the electrophoretic element 28.

  Further, as shown in FIG. 5B, when the potential of the pixel electrode 35 is relatively higher than the potential of the common electrode 37, the positively charged black particles 26 move (migrate) to the common electrode 37 side, The negatively charged white particles 27 move (migrate) to the pixel electrode 35 side. As a result, when the common electrode 37 side is viewed in this state, black is recognized in the pixel portion corresponding to the electrophoretic element 28. Therefore, by displaying white or black for each pixel portion, the display panel 5 in which these pixel portions are basically arranged in a matrix can display a pattern consisting of white or black. .

  The electrophoretic dispersion liquid 25 is not limited to the above two-particle type, and one-particle type can also be used. In this case, a colored liquid dispersion medium is used. You can also. In both the two-particle system and the one-particle system, various colors other than white and black can be adopted as the particle color.

  Here, in the display region other than the peripheral portion of the through hole 5A, as shown in FIG. 6, the pixel portions 40 are arranged in a matrix. Each of the pixel units 40 includes the electrophoretic element 28 and further includes the pixel driving circuit 34 connected to the pixel electrode 35. That is, as shown in the circuit diagram of FIG. 7, each of the pixel units 40 includes a transistor 41 as a switching element, a latch circuit 46 configured by combining four transistors 42, 43, 44, and 45, and the electric circuit. The electrophoretic element 28 is provided. In particular, the pixel drive circuit 34 includes a transistor 41 and a latch circuit 46 in the present embodiment.

  The transistor 41 is, for example, a field effect type n-channel transistor, and has a gate connected to a scanning line (scanning line) 47, one source drain (input end) connected to a data line (signal line) 48, The other source / drain (output terminal) is connected to the input terminal of the latch circuit 46.

  The latch circuit (flip-flop circuit) 46 is configured by combining, for example, two field effect type n-channel transistors 42 and 44 and two field effect type p channel transistors 43 and 45. Specifically, the transistors 42 and 43 have one source / drain connected to each other, the other source / drain of the transistor 42 is connected to the low voltage power line 49, and the other source / drain of the transistor 43 is connected to the high voltage power source. Connected to line 50. Similarly, the transistors 44 and 45 have one source / drain connected to each other, the other source / drain of the transistor 44 is connected to the low voltage power line 49, and the other source / drain of the transistor 45 is connected to the high voltage power line 50. Connected to.

The gates of the transistors 42 and 43 are connected to a connection point N1 between the sources and drains of the transistors 44 and 45. The connection point N1 functions as an input terminal of the latch circuit 46. The input terminal N1 is connected to the other source / drain (output terminal) of the transistor 41. The gates of the transistors 44 and 45 are connected to a connection point N2 between the sources and drains of the transistors 42 and 43. The connection point N2 functions as an output terminal of the latch circuit 46. The output terminal N2 of the latch circuit 46 is connected to the pixel electrode 35, that is, the electrode on one side of the electrophoretic element 28. Latch circuit 46 on the basis of this configuration, the low voltage V _SS appears at the output terminal N2 when the potential supplied to the input terminal N1 is at a high potential, potential applied to the input terminal N1 is low potential At this time, the high potential _VEP appears at the output terminal N2.

Note that a wiring connected to the pixel driving circuit 34, that is, a scanning line (scanning line) 47 and a data line (signal line) 48 connected to the transistor 41, a low voltage power supply line 49 connected to the latch circuit 46, and a high voltage power supply. As described above, the lines 50 and the like are linearly arranged vertically and horizontally as shown in FIG. 6 in the display region other than the peripheral portion of the through hole 5A.
On the other hand, in the peripheral portion of the through-hole 5A, as shown in FIG. 8, among the wirings such as the scanning lines 47 and the data lines 48 (hereinafter, these wirings are collectively referred to as wirings 60), especially the design In the wiring 60 arranged at the position passing through the upper through hole 5A, that is, if there is no through hole 5A, the wiring 60 arranged so as to pass through the site where the through hole 5A is formed is avoided. A bypass wiring portion 60a that bypasses the periphery is provided.

  Here, a seal portion 51 that seals the periphery of the through-hole 5A is formed around the through-hole 5A, and this seal portion 51 is also a portion through which the wiring 60 cannot pass. Therefore, in this embodiment, not only the through hole 5A but also the seal portion 51 is an avoidance portion in the present invention. That is, among the wiring 60, not only the wiring 60 arranged at a position passing through the through-hole 5 </ b> A by design, but also the wiring 60 arranged at a position passing through the sealing section 51 by design. Thus, a bypass wiring portion 60a that bypasses the surroundings is provided.

  Further, as shown in FIG. 8, it is necessary to form the bypass wiring portion 60a in the wiring 60 located in the vicinity of the wiring 60 in which the bypass wiring portion 60a is formed, in order to avoid the bypass wiring portion 60a. There is something. With respect to such wiring 60 as well, a bypass wiring portion 60a is similarly formed in the present embodiment. That is, in this embodiment, in addition to the through hole 5A and the seal portion 51, the bypass wiring 60a located in the vicinity thereof is also the avoidance portion 52 in the present invention.

  In the pixel portion (not shown) located around the through-hole 5A, each pixel electrode 35, that is, the surrounding pixel electrode 35a in the present invention is formed larger than the other pixel electrodes 35. In the present embodiment, the peripheral pixel electrodes 35a extend in the horizontal direction (or vertical direction) with respect to the through-hole 5A along the alignment direction of the pixel electrodes 35 including the peripheral pixel electrode 35a. Is formed. That is, the surrounding pixel electrode 35a is formed in a state extending to the through hole 5A side.

A bypass wiring portion 60a of the wiring 60 is disposed immediately below the portion of the peripheral pixel electrode 35a that extends toward the through hole 5A. As shown in FIG. 4, the pixel driving circuit 34 connected to the surrounding pixel electrode 35a is disposed at the farthest position from the through hole 5A. Therefore, the bypass wiring portion 60a interferes with the pixel driving circuit 34. Instead, it is formed and arranged on the side of this.
In the present embodiment, one pixel driving circuit 34 is provided for each of the plurality of surrounding pixel electrodes 35a. Therefore, each of the plurality of surrounding pixel electrodes 35a is independently controlled. It has become so.

  Further, as shown in FIGS. 4 and 9, in this embodiment, the peripheral pixel electrode 35a is formed to have an area four times that of the other pixel electrodes 35, and there is 4 directly under the extended portion. Two bypass wiring portions 60a are provided. In the pixel drive circuit unit 34 connected to the surrounding pixel electrodes 35a, although not shown, the gate width W2 of the transistor 41 serving as the switching element is equal to the transistor of the pixel drive circuit unit 34 connected to the other pixel electrode 35. The gate width W1 is larger than 41. Specifically, the ratio of the gate width W2 to the gate width W1 may be 4: 1 which is the area ratio of the pixel electrode 35, or may be more or less. Further, in order to stabilize the operation of the latch circuit 46, the ratio of the gate widths of the transistors 42, 43, 44, 45 may be 4: 1 which is the area ratio of the pixel electrode 35, or more. It is good also as follows.

As the pixel driving circuit 34, a capacitive element may be used instead of the latch circuit 46. In that case, in the pixel drive circuit unit 34 connected to the surrounding pixel electrode 35 a and the pixel drive circuit unit 34 connected to the other pixel electrode 35, the capacitance of this capacitor element is also set to the size of the pixel electrode 35. It is preferable to change according to the area ratio.
As described above, the gate electrode W 35 and the size of the capacitive element are changed corresponding to the area ratio of the pixel electrode 35, so that the pixel electrode 35 can be applied to the surrounding pixel electrode 35 a having a larger area than the pixel electrode 35. It is possible to apply a potential equivalent to the potential applied to. Therefore, even in the electrophoretic element 28 provided with the surrounding pixel electrode 35a, a display equivalent to that of the electrophoretic element 28 provided with the other pixel electrode 35 can be achieved.

  In the display panel 5 in the wristwatch 1 having such a configuration, the wiring 60 in the first substrate 30 is arranged at a position that passes through the design avoidance portion 52 (including the through hole 5A and the seal portion 51). Since the bypass wiring portion 60a is provided in the wiring 60, the problem that the display by the pixel electrode 35 connected to the wiring 60 is not made can be avoided. In addition, the peripheral pixel electrode 35a positioned around the through hole 5A is formed larger than the other pixel electrodes 35, and the peripheral pixel electrode 35a is formed in a state extending to the through hole 5A side. Thus, the display area in the vicinity of the through hole 5A can be expanded by the extent that the surrounding pixel electrode 35a extends to the through hole 5A side. Furthermore, since the bypass wiring portion 60a is disposed immediately below the portion of the surrounding pixel electrode 35a that extends toward the through hole 5A, the bypass wiring portion 60 prevents the pixel drive circuit 34 from being disposed. Inconvenience can be avoided. Therefore, it is possible to easily cope with a high-resolution (high-definition) one with a large number of wirings to be bypassed without any trouble. Therefore, according to the display panel 5, a large display area can be secured without lowering the display quality and without increasing the number of wiring layers without causing a significant increase in manufacturing cost.

In addition, since a plurality of surrounding pixel electrodes 35a are provided and one pixel driving circuit 34 is provided for each of the plurality of surrounding pixel electrodes 35a, the plurality of surrounding pixel electrodes 35a can be controlled independently. Therefore, display in the vicinity of the through-hole 5A by these peripheral pixel electrodes 35a can be performed with high definition.
The display panel 5 employs an electrophoretic element having display retention (memory property) as an electro-optical element constituting the display panel 5, so that the display is fixed like a dial, for example. In this case, even if the electric field applied to the electrophoretic particles is eliminated, the display maintains the state due to the electric field previously applied. Therefore, power consumption can be reduced.

  In the embodiment, one pixel driving circuit 34 is provided for each of the plurality of surrounding pixel electrodes 35a. However, the present invention is not limited to this, and the plurality of surrounding pixel electrodes 35a are provided for the plurality of surrounding pixel electrodes 35a. A plurality of pixel driving circuits 34 may be provided for each. For example, two neighboring pixel electrodes 35a and 35a adjacent to each other in FIG. 8 may be a single surrounding pixel electrode 35b as indicated by a two-dot chain line in FIG. In that case, two pixel drive circuits 34 are connected to the surrounding pixel electrode 35b.

In this way, one peripheral pixel electrode 35b can be driven by the plurality of pixel drive circuits 34. Therefore, the plurality of pixel drive circuits 34 perform the same operation, and the plurality of pixel drive circuits 34 cooperate. By operatively driving, for example, an electric field equivalent to that of the other pixel electrode 35 can be generated with respect to the surrounding pixel electrode 35 b formed larger than the other pixel electrode 35. Therefore, even in the electrophoretic element 28 provided with the surrounding pixel electrode 35a, display equivalent to that of the electrophoretic element 28 provided with the other pixel electrode 35 can be performed.
Also in this example, since a plurality of surrounding pixel electrodes 35a are provided, display in the vicinity of the through hole 5A by these surrounding pixel electrodes 35a can be performed with high definition.

  Furthermore, in the present invention, as shown in FIG. 10, only one peripheral pixel electrode 35c is provided, and the peripheral pixel electrode 35c is positioned around the through hole 5A and is located on the innermost side with respect to the through hole 5A. All the pixel driving circuits 34 located may be connected in correspondence. In this way, the surrounding pixel electrode 35c has an annular shape extending from directly above the pixel drive circuit 34 to be connected toward the through hole 5A. In FIG. 10, only a part of the wiring 60 is shown (in a hidden line) for easy viewing.

  In this way, as in the above example, one peripheral pixel electrode 35c can be driven by the plurality of pixel drive circuits 34. Therefore, the plurality of pixel drive circuits 34 can perform the same operation, and the plurality of these pixel drive circuits 34 can be driven. For example, an electric field equivalent to that of the other pixel electrode 35 is generated with respect to the surrounding pixel electrode 35c, and the electrophoretic element 28 including the surrounding pixel electrode 35c is caused to generate other electric fields. Display equivalent to that of the electrophoretic element 28 including the pixel electrode 35 can be made.

  In the above embodiment, the display area of the display panel 5 is described as having a circular shape as shown in FIG. 1, but the present invention is not limited to this. For example, as shown in FIG. It may be of a shape. In this way, particularly in the case of an octagonal shape, for example, one of the scanning lines 47 and the data lines 48 may be arranged obliquely (for example, at 45 °) without being orthogonal to each other. Even in such a case, among these wirings (scanning line 47, data line 48) 60, especially the wiring 60 arranged at a position passing through the avoidance part by design avoids the avoidance part and bypasses the periphery thereof. A bypass wiring portion 60a is formed.

  Although not shown in FIG. 11, a plurality of surrounding pixel electrodes 35a (35b) are formed directly on the bypass wiring portion 60a as shown in FIG. 8, or as shown in FIG. Thus, one peripheral pixel electrode 35c is formed. That is, as shown in FIG. 8, it extends to the through-hole 5A side as a peripheral pixel electrode connected to the pixel drive circuit 34 located around the through-hole 5A and located on the innermost side with respect to the through-hole 5A. Thus, a plurality of surrounding pixel electrodes 35a (35b) are formed, or one surrounding pixel electrode 35c is formed as shown in FIG.

According to such a configuration, the shape of the display area of the display panel 5 is a square shape other than a circle, for example, an octagonal shape, and the wiring 60 passing through the avoidance part such as the through hole 5A in the design is oblique as described above. Even in the case of crossing, the display area in the vicinity of the avoidance portion such as the through-hole 5A can be expanded in the same manner as in the case of the circular shape.
In addition to the octagonal shape as described above, even if the display panel 5 has a rectangular shape as shown in FIG. 12A, as an example of a special shape, a heart shape as shown in FIG. Even so, the display area in the vicinity of the avoidance portion such as the through hole 5A can be expanded in the same manner. In FIGS. 12A and 12B, reference numeral 61 denotes a gate driver, and reference numeral 62 denotes a source driver.

  Moreover, although the said avoidance part including all the through-holes 5A was demonstrated as what was formed in the display area of the display panel 5 in the said embodiment, this invention is not limited to this, Only a part may be formed in the display area of the display panel 5. Specifically, as shown in FIG. 13A, when the panel shape is a regular octagon and the through hole 5A is formed at the center, half of the through hole 5A is provided with the wiring 60. The display area may be formed so that the other half is located on the non-display area side. Further, as shown in FIG. 13B, the display area is arranged such that 1/4 of the through hole 5A is located on the display area side where the wiring 60 is provided and the rest is located on the non-display area side. May be formed. In FIGS. 13A and 13B, reference numeral 63 denotes a gate driver, and reference numeral 64 denotes a data driver.

  According to such a configuration, the active matrix circuit substrate of the present invention can be made to correspond to the display panel 5 having a relatively small display area. Therefore, application to a display panel that extends the battery life by narrowing the display area and suppressing power consumption is facilitated.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, in the above-described embodiment, an electrophoretic dispersion liquid is used as an electro-optical material, and display is performed by configuring an electrophoretic element. However, for example, by using a liquid crystal material as an electro-optical material, liquid crystal can be used. The display element may be configured, or the organic EL element may be configured by using an organic EL material.

In the above embodiment, an example in which the display device of the present invention is applied to a wristwatch has been described. However, it is needless to say that the present invention can also be applied to a table clock, a wall clock, a wall clock, a pocket watch, and the like.
In addition to the timepiece, the present invention can be applied to various instruments having hands, and can also be applied to various display devices having an avoiding portion other than the through hole.

It is a front view of the wristwatch concerning the display of the present invention. It is side sectional drawing of a wristwatch. It is a sectional side view of a display panel. It is principal part side sectional drawing of one Embodiment of an active matrix circuit board. (A), (b) is operation | movement explanatory drawing of an electrophoretic element. It is a figure which shows display areas other than the peripheral part of a through-hole. It is an equivalent circuit diagram of a pixel part. It is the top view which showed typically the principal part of the peripheral part of a through-hole. It is an enlarged plan view of surrounding pixel electrodes. It is the top view which showed the peripheral part of the through-hole typically. It is the top view which showed the peripheral part of the through-hole typically. (A), (b) is a top view which shows the example of a shape of the display area of a display panel. (A), (b) is a top view which shows the relationship between a display area and a through-hole.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Wristwatch, 5 ... Display panel (display apparatus), 5A ... Through-hole, 25 ... Electrophoretic dispersion liquid, 28 ... Electrophoretic element, 30 ... 1st board | substrate (active matrix circuit board), 31 ... 2nd board | substrate, 32 ... Electrophoresis layer, 34 ... Pixel drive circuit, 35 ... Pixel electrode, 35a, 35b, 35c ... Peripheral pixel electrode, 37 ... Common electrode (counter electrode), 41 ... Transistor, 46 ... Latch circuit, 47 ... Scanning line, 48 ... Data line 51 ... Seal part 52 ... Avoidance part 60 ... Wiring 60a ... Detour wiring part

Claims (9)

An active matrix circuit substrate for a display device, comprising: a pixel electrode; a pixel drive circuit for driving the pixel electrode; and a wiring connected to the pixel electrode circuit,
An avoidance unit that avoids the wiring in a region corresponding to a display region of the display device, and a wiring having a bypass wiring unit that avoids the avoidance unit,
Surrounding pixel electrodes positioned around the avoiding portion are formed larger than other pixel electrodes, and the surrounding pixel electrodes are formed in a shape extending to the avoiding portion side,
2. The active matrix circuit board according to claim 1, wherein the bypass wiring portion is disposed immediately below the surrounding pixel electrode.   The active matrix circuit board according to claim 1, wherein the avoiding portion is a hole.   3. The active matrix circuit substrate according to claim 1, wherein a plurality of the surrounding pixel electrodes are provided, and each of the surrounding pixel electrodes is provided with a corresponding pixel driving circuit.   3. The active matrix circuit substrate according to claim 1, wherein a plurality of the surrounding pixel electrodes are provided, and a plurality of pixel driving circuits are provided corresponding to each of the surrounding pixel electrodes.   3. The active matrix circuit board according to claim 1, wherein only one peripheral pixel electrode is provided, and a plurality of pixel drive circuits are provided corresponding to the peripheral pixel electrode.   The active matrix circuit board according to claim 1, wherein the avoidance unit is entirely formed in a region corresponding to a display region of the display device.   The active matrix circuit board according to claim 1, wherein only a part of the avoidance unit is formed in a region corresponding to a display region of the display device. A first substrate having a pixel electrode provided on the inner surface side, a second substrate having a counter electrode provided on the inner surface side, and an electro-optic material sandwiched between the first substrate and the second substrate A display device comprising:
The display device, wherein the first substrate is the active matrix circuit substrate according to claim 1.   9. The display device according to claim 8, wherein the electro-optical material is an electrophoretic dispersion liquid including electrophoretic particles and a liquid phase dispersion medium in which the electrophoretic particles are dispersed.

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