JP7432350B2 - display device - Google Patents

Description

The present disclosure relates to a display device.

Patent Document 1 describes a first light-transmitting substrate, a second light-transmitting substrate disposed opposite to the first light-transmitting substrate, and a first light-transmitting substrate and a second light-transmitting substrate. A display comprising a liquid crystal layer having a polymer dispersed liquid crystal sealed therebetween, and at least one light emitting section disposed opposite to at least one side surface of a first light-transmitting substrate and a second light-transmitting substrate. The equipment is described.

Japanese Patent Application Publication No. 2018-021974

In the display device described in Patent Document 1, from one surface of the display panel, the background on the other surface on the opposite side can be visually recognized. Since the light source is disposed facing at least one side surface of the first light-transmitting substrate and the second light-transmitting substrate, it is necessary to reduce light leakage of the switching element due to the light source.

An object of the present invention is to provide a display device in which an image displayed using a light source is visible from one side of a display panel together with the background on the other side of the display panel, and light leakage from switching elements can be reduced. It's about doing.

The display device according to one embodiment includes an array substrate, a counter substrate, a liquid crystal layer between the array substrate and the counter substrate, and a display device arranged such that light enters a side surface of the array substrate or a side surface of the counter substrate. a light source, the array substrate includes a plurality of signal lines arranged at intervals in a first direction, a plurality of scanning lines arranged at intervals in a second direction, and the scanning lines and the signal lines arranged at intervals. a switching element connected to the pixel electrode, the switching element having a drain electrode connected to the pixel electrode via a contact hole, a source electrode, and a gate electrode electrically connected to the scanning line; The source electrode has a first linear portion extending in the second direction, a second linear portion arranged at intervals in the first direction and extending in the second direction, and a first linear portion extending in the second direction. It has a connection part that connects one end and one end of the second straight part, and has a detour part that connects the other end of the first straight part and the signal line.

FIG. 1 is a perspective view showing an example of a display device according to this embodiment. FIG. 2 is a block diagram showing the display device of the first embodiment. FIG. 3 is a timing chart illustrating the timing at which the light source emits light in the field sequential method of the first embodiment. FIG. 4 is an explanatory diagram showing the relationship between the voltage applied to the pixel electrode and the scattering state of the pixel. FIG. 5 is a cross-sectional view showing an example of the cross section of the display device of FIG. 6 is a plan view showing the plane of the display device of FIG. 1. FIG. FIG. 7 is an enlarged cross-sectional view of the liquid crystal layer portion of FIG. 5. FIG. FIG. 8 is a cross-sectional view for explaining the non-scattering state in the liquid crystal layer. FIG. 9 is a cross-sectional view for explaining the scattering state in the liquid crystal layer. FIG. 10 is a plan view showing scanning lines, signal lines, and switching elements in a pixel. FIG. 11 is a plan view showing a storage capacitor layer in a pixel. FIG. 12 is a plan view showing an auxiliary metal layer and an opening area in a pixel. FIG. 13 is a plan view showing a pixel electrode in a pixel. FIG. 14 is a plan view showing a light shielding layer in a pixel. FIG. 15 is a sectional view taken along line XV-XV' in FIG. 14. FIG. 16 is a cross-sectional view taken along line XVI-XVI' in FIG. FIG. 17 is a cross-sectional view taken along line XVII-XVII' in FIG. FIG. 18 is a cross-sectional view of the peripheral area. FIG. 19 is an enlarged plan view showing the switching element of the first embodiment. FIG. 20 is an enlarged plan view of a switching element of a comparative example. FIG. 21 is an enlarged plan view showing the switching element of the second embodiment. FIG. 22 is an enlarged plan view showing the switching element of the third embodiment.

Modes (embodiments) for carrying out the present disclosure will be described in detail with reference to the drawings. The present disclosure is not limited to the content described in the embodiments below. Further, the constituent elements described below include those that can be easily assumed by those skilled in the art and those that are substantially the same. Furthermore, the components described below can be combined as appropriate. Note that the disclosure is merely an example, and any modifications that can be easily thought of by those skilled in the art while maintaining the gist of the disclosure are naturally included within the scope of the present disclosure. In addition, in order to make the explanation more clear, the drawings may schematically represent the width, thickness, shape, etc. of each part compared to the actual aspect, but these are only examples, and the interpretation of this disclosure will be limited. It is not limited. In addition, in this specification and each figure, the same elements as those described above with respect to the previously shown figures are denoted by the same reference numerals, and detailed explanations may be omitted as appropriate.

(Embodiment 1)
FIG. 1 is a perspective view showing an example of a display device according to this embodiment. FIG. 2 is a block diagram representing the display device of FIG. 1. FIG. 3 is a timing chart illustrating the timing at which the light source emits light in the field sequential method.

As shown in FIG. 1, the display device 1 includes a display panel 2, a light source 3, and a drive circuit 4. Here, one direction of the plane of the display panel 2 is defined as a PX direction, a direction perpendicular to the PX direction is defined as a second direction PY, and a direction perpendicular to the PX-PY plane is defined as a third direction PZ.

The display panel 2 includes an array substrate 10, a counter substrate 20, and a liquid crystal layer 50 (see FIG. 5). The counter substrate 20 faces the surface of the array substrate 10 in a direction perpendicular to the surface (PZ direction shown in FIG. 1). In the liquid crystal layer 50 (see FIG. 5), a polymer dispersed liquid crystal LC, which will be described later, is sealed with the array substrate 10, the counter substrate 20, and the sealing part 18.

As shown in FIG. 1, the display panel 2 includes a display area AA in which an image can be displayed and a peripheral area FR outside the display area AA. In the display area AA, a plurality of pixels Pix are arranged in a matrix. Note that in this disclosure, a row refers to a pixel row having m pixels Pix arranged in one direction. Further, a column refers to a pixel column having n pixels Pix arranged in a direction perpendicular to the direction in which rows are arranged. The values of m and n are determined depending on the display resolution in the vertical direction and the display resolution in the horizontal direction. Further, a plurality of scanning lines GL are wired for each row, and a plurality of signal lines SL are wired for each column.

The light source 3 includes a plurality of light emitting sections 31. As shown in FIG. 2, the light source control section 32 is included in the drive circuit 4. Note that the light source control section 32 may be a circuit separate from the drive circuit 4. The light emitting section 31 and the light source control section 32 are electrically connected by wiring within the array substrate 10.

As shown in FIG. 1, the drive circuit 4 is fixed to the surface of the array substrate 10. As shown in FIG. 2, the drive circuit 4 includes a signal processing circuit 41, a pixel control circuit 42, a gate drive circuit 43, a source drive circuit 44, and a common potential drive circuit 45. The array substrate 10 has a larger area in the XY plane than the counter substrate 20, and the drive circuit 4 is provided in the overhanging portion of the array substrate 10 exposed from the counter substrate 20.

An input signal (such as an RGB signal) VS is input to the signal processing circuit 41 from an image output section 91 of an external higher-level control section 9 via a flexible substrate 92 .

The signal processing circuit 41 includes an input signal analysis section 411, a storage section 412, and a signal adjustment section 413. The input signal analysis unit 411 generates a second input signal VCS based on a first input signal VS input from the outside.

The second input signal VCS is a signal that determines what gradation value is given to each pixel Pix of the display panel 2 based on the first input signal VS. In other words, the second input signal VCS is a signal containing gradation information regarding the gradation value of each pixel Pix.

The signal adjustment unit 413 generates a third input signal VCSA from the second input signal VCS. The signal adjustment section 413 sends out the third input signal VCSA to the pixel control circuit 42 and sends out the light source control signal LCSA to the light source control section 32. The light source control signal LCSA is, for example, a signal that includes information on the amount of light from the light emitting section 31, which is set according to the gradation value input to the pixel Pix. For example, when a dark image is displayed, the amount of light from the light emitting section 31 is set to be small. When a bright image is displayed, the amount of light from the light emitting section 31 is set to be large.

Then, the pixel control circuit 42 generates a horizontal drive signal HDS and a vertical drive signal VDS based on the third input signal VCSA. In this embodiment, since driving is performed using a field sequential method, a horizontal drive signal HDS and a vertical drive signal VDS are generated for each color in which the light emitting section 31 can emit light.

The gate drive circuit 43 sequentially selects the scanning lines GL of the display panel 2 within one vertical scanning period based on the horizontal drive signal HDS. The order of selection of the scanning lines GL is arbitrary.

The source drive circuit 44 supplies a gradation signal corresponding to the output gradation value of each pixel Pix to each signal line SL of the display panel 2 within one horizontal scanning period based on the vertical drive signal VDS.

In this embodiment, the display panel 2 is an active matrix panel. For this reason, there is a signal (source) line SL extending in the second direction PY and a scanning (gate) line GL extending in the first direction PX in plan view, and at the intersection of the signal line SL and the scanning line GL. has a switching element Tr.

A thin film transistor is used as the switching element Tr. As an example of the thin film transistor, a bottom gate transistor or a top gate transistor may be used. Although a single gate thin film transistor is illustrated as the switching element Tr, a double gate transistor may also be used. One of the source and drain electrodes of the switching element Tr is connected to the signal line SL, the gate electrode is connected to the scanning line GL, and the other of the source and drain electrodes is connected to the capacitance of a polymer dispersed liquid crystal LC, which will be described later. connected to one end of the One end of the capacitor of the polymer dispersed liquid crystal LC is connected to the switching element Tr via the pixel electrode PE, and the other end is connected to the common potential line COML via the common electrode CE. Further, a storage capacitor HC is generated between the pixel electrode PE and the storage capacitor electrode IO electrically connected to the common potential wiring COML. Note that the common potential wiring COML is supplied from the common potential drive circuit 45.

The light emitting section 31 includes a first color (for example, red) light emitter 33R, a second color (for example, green) light emitter 33G, and a third color (for example, blue) light emitter 33B. The light source control unit 32 controls each of the first color light emitter 33R, the second color light emitter 33G, and the third color light emitter 33B to emit light in a time-sharing manner based on the light source control signal LCSA. In this way, the first color light emitter 33R, the second color light emitter 33G, and the third color light emitter 33B are driven in a field sequential manner.

As shown in FIG. 3, in the first subframe (first predetermined time) RF, the first color light emitting body 33R emits light during the first color light emission period RON, and the light emitting body 33R of the first color emits light during the first color light emission period RON, and the light emitting body 33R that is selected within one vertical scanning period GateScan Pixel Pix scatters light for display. In the display panel 2 as a whole, if a grayscale signal corresponding to the output grayscale value of each pixel Pix is supplied to each signal line SL described above to the pixel Pix selected within one vertical scanning period GateScan, the first During the color light emission period RON, only the first color is lit.

Next, in the second subframe (second predetermined time) GF, the second color light emitter 33G emits light during the second color light emission period GON, and the pixel Pix selected within one vertical scanning period GateScan emits light. are displayed in a scattered manner. In the entire display panel 2, if a gradation signal corresponding to the output gradation value of each pixel Pix is supplied to each signal line SL described above to the pixel Pix selected within one vertical scanning period GateScan, the second Only the second color is lit during the color light emission period GON.

Furthermore, in the third subframe (third predetermined time) BF, the third color light emitter 33B emits light during the third color light emission period BON, and the pixel Pix selected within one vertical scanning period GateScan emits light. Display in a scattered manner. In the display panel 2 as a whole, if a grayscale signal corresponding to the output grayscale value of each pixel Pix is supplied to each signal line SL described above to the pixel Pix selected within one vertical scanning period GateScan, the third During the color light emission period BON, only the third color is lit.

Since the human eye has a limited temporal resolution and an afterimage occurs, a composite image of three colors is recognized in one frame (1F). In the field sequential method, color filters are not required and absorption loss in the color filters is reduced, so high transmittance can be achieved. In the color filter method, one pixel is created by subpixels obtained by dividing the pixel Pix into each of the first, second, and third colors, whereas in the field sequential method, the pixel Pix is divided into subpixels for each of the first, second, and third colors. good. Note that it is also possible to further include a fourth subframe and emit light in a fourth color different from the first color, the second color, and the third color.

FIG. 4 is an explanatory diagram showing the relationship between the voltage applied to the pixel electrode and the scattering state of the pixel. FIG. 5 is a cross-sectional view showing an example of the cross section of the display device of FIG. 6 is a plan view showing the plane of the display device of FIG. 1. FIG. FIG. 5 is a cross section taken along the line VV' in FIG. FIG. 7 is an enlarged cross-sectional view of the liquid crystal layer portion of FIG. 5. FIG. FIG. 8 is a cross-sectional view for explaining the non-scattering state in the liquid crystal layer. FIG. 9 is a cross-sectional view for explaining the scattering state in the liquid crystal layer.

If a gradation signal corresponding to the output gradation value of each pixel Pix is supplied to each signal line SL described above to the pixel Pix selected within one vertical scanning period GateScan, the pixel electrode is changed according to the gradation signal. The voltage applied to PE changes. When the voltage applied to the pixel electrode PE changes, the voltage between the pixel electrode PE and the common electrode CE changes. Then, as shown in FIG. 4, the scattering state of the liquid crystal layer 50 for each pixel Pix is controlled according to the voltage applied to the pixel electrode PE, and the scattering ratio within the pixel Pix changes.

As shown in FIG. 4, when the voltage applied to the pixel electrode PE becomes equal to or higher than the saturation voltage Vsat, the change in the scattering ratio within the pixel Pix becomes small. Therefore, the drive circuit 4 changes the voltage applied to the pixel electrode PE according to the vertical drive signal VDS in a voltage range Vdr lower than the saturation voltage Vsat.

As shown in FIGS. 5 and 6, the array substrate 10 includes a first main surface 10A, a second main surface 10B, a first side surface 10C, a second side surface 10D, a third side surface 10E, and a fourth side surface 10F. The first main surface 10A and the second main surface 10B are parallel planes. Further, the first side surface 10C and the second side surface 10D are parallel planes. The third side surface 10E and the fourth side surface 10F are parallel planes.

As shown in FIGS. 5 and 6, the counter substrate 20 includes a first main surface 20A, a second main surface 20B, a first side surface 20C, a second side surface 20D, a third side surface 20E, and a fourth side surface 20F. The first main surface 20A and the second main surface 20B are parallel planes. The first side surface 20C and the second side surface 20D are parallel planes. The third side surface 20E and the fourth side surface 20F are parallel planes.

As shown in FIGS. 5 and 6, the light source 3 faces the second side surface 20D of the counter substrate 20. The light source 3 is sometimes called a side light source. As shown in FIG. 5, the light source 3 irradiates the second side surface 20D of the counter substrate 20 with the light source light L. The second side surface 20D of the counter substrate 20 facing the light source 3 becomes a light incident surface.

As shown in FIG. 5, the light source light L emitted from the light source 3 is reflected by the first main surface 10A of the array substrate 10 and the first main surface 20A of the counter substrate 20, while moving away from the second side surface 20D ( propagates in the second direction PY). When the light source light L goes to the outside from the first main surface 10A of the array substrate 10 or the first main surface 20A of the counter substrate 20, the light source light L goes from a medium with a high refractive index to a medium with a low refractive index. If the incident angle at which the light L enters the first main surface 10A of the array substrate 10 or the first main surface 20A of the counter substrate 20 is larger than the critical angle, the light source light L enters the first main surface 10A of the array substrate 10 or the first main surface 20A of the counter substrate 20. It is totally reflected at the first main surface 20A of the.

As shown in FIG. 5, the light source light L propagated inside the array substrate 10 and the counter substrate 20 is scattered by a pixel Pix where the liquid crystal is in a scattered state, and the incident angle of the scattered light is smaller than the critical angle. The radiated lights 68 and 68A are radiated to the outside from the first main surface 20A of the counter substrate 20 and the first main surface 10A of the array substrate 10, respectively, at an angle. The radiation lights 68 and 68A emitted to the outside from the first main surface 20A of the counter substrate 20 and the first main surface 10A of the array substrate 10, respectively, are observed by an observer. The polymer-dispersed liquid crystal in a scattering state and the polymer-dispersed liquid crystal in a non-scattering state will be described below with reference to FIGS. 7 to 9.

As shown in FIG. 7, the array substrate 10 is provided with a first alignment film AL1. A second alignment film AL2 is provided on the counter substrate 20. The first alignment film AL1 and the second alignment film AL2 are, for example, vertical alignment films.

A solution containing liquid crystal and monomer is sealed between the array substrate 10 and the counter substrate 20. Next, with the monomers and liquid crystals aligned by the first alignment film AL1 and the second alignment film AL2, the monomers are polymerized by ultraviolet rays or heat to form the bulk 51. As a result, a liquid crystal layer 50 having a reverse mode polymer-dispersed liquid crystal LC in which liquid crystal is dispersed in the gaps of a polymer network formed in a mesh shape is formed.

In this way, the polymer-dispersed liquid crystal LC includes a bulk 51 made of polymer and a plurality of fine particles 52 dispersed within the bulk 51. The fine particles 52 are made of liquid crystal. The bulk 51 and the fine particles 52 each have optical anisotropy.

The orientation of the liquid crystal contained in the fine particles 52 is controlled by the voltage difference between the pixel electrode PE and the common electrode CE. The orientation of the liquid crystal changes depending on the voltage applied to the pixel electrode PE. By changing the orientation of the liquid crystal, the degree of scattering of light passing through the pixel Pix changes.

For example, as shown in FIG. 8, when no voltage is applied between the pixel electrode PE and the common electrode CE, the directions of the optical axis Ax1 of the bulk 51 and the optical axis Ax2 of the fine particles 52 are equal to each other. The optical axis Ax2 of the fine particles 52 is parallel to the PZ direction of the liquid crystal layer 50. The optical axis Ax1 of the bulk 51 is parallel to the PZ direction of the liquid crystal layer 50 regardless of the presence or absence of voltage.

The ordinary refractive index of the bulk 51 and the fine particles 52 are equal to each other. When no voltage is applied between the pixel electrode PE and the common electrode CE, the refractive index difference between the bulk 51 and the fine particles 52 becomes zero in all directions. The liquid crystal layer 50 is in a non-scattering state in which it does not scatter the light source light L. The light source light L propagates in a direction away from the light source 3 (light emitting section 31) while being reflected by the first main surface 10A of the array substrate 10 and the first main surface 20A of the counter substrate 20. When the liquid crystal layer 50 is in a non-scattering state in which it does not scatter the light source light L, the background on the first main surface 20A side of the counter substrate 20 is visible from the first main surface 10A of the array substrate 10, and the background on the first main surface 20A side of the counter substrate 20 is visible. The background on the first main surface 10A side of the array substrate 10 is visible from the surface 20A.

As shown in FIG. 9, between the pixel electrode PE and the common electrode CE to which a voltage is applied, the optical axis Ax2 of the fine particles 52 is tilted by the electric field generated between the pixel electrode PE and the common electrode CE. Become. Since the optical axis Ax1 of the bulk 51 does not change due to the electric field, the directions of the optical axis Ax1 of the bulk 51 and the optical axis Ax2 of the fine particles 52 are different from each other. The light source light L is scattered in a pixel Pix that has a pixel electrode PE to which a voltage is applied. The light in which a portion of the light source light L scattered as described above is emitted to the outside from the first main surface 10A of the array substrate 10 or the first main surface 20A of the counter substrate 20 is observed by an observer.

In a pixel Pix where there is a pixel electrode PE to which no voltage is applied, the background from the first main surface 10A of the array substrate 10 to the first main surface 20A side of the counter substrate 20 is visible, and the background from the first main surface 20A of the counter substrate 20 is visible. The background on the first principal surface 10A side of the array substrate 10 can be visually recognized. In the display device 1 of this embodiment, when the first input signal VS is input from the image output unit 91, a voltage is applied to the pixel electrode PE of the pixel Pix where an image is displayed, and the third input signal VCSA is The based image is visible with the background. In this way, when the polymer dispersed liquid crystal is in the scattering state, an image is displayed in the display area.

In a pixel Pix where a pixel electrode PE to which a voltage is applied is located, the light source light L is scattered and emitted to the outside, and an image displayed is overlapped with the background. In other words, the display device 1 of this embodiment displays an image superimposed on the background by combining the radiation light 68 or radiation light 68A with the background.

In one vertical scanning period GateScan shown in FIG. 3, the written potential of each pixel electrode PE (see FIG. 7) is the first color light emission period RON and the second color light emission period after each one vertical scanning period GateScan. It is necessary to hold at least one of GON and the third color light emission period BON. The written potential of each pixel electrode PE (see FIG. 7) is set to at least one of the first color light emission period RON, second color light emission period GON, and third color light emission period BON after each vertical scanning period GateScan. If it cannot be held in one piece, so-called flicker is likely to occur. In other words, in order to shorten one vertical scanning period GateScan, which is the selection time of the scanning line, and to improve the visibility during driving in the so-called field sequential method, the first color light emission period RON, the second color light emission period GON and There is a desire to easily maintain the written potential of each pixel electrode PE (see FIG. 7) in each of the third color light emission periods BON.

FIG. 10 is a plan view showing scanning lines, signal lines, and switching elements in a pixel. FIG. 11 is a plan view showing a storage capacitor layer in a pixel. FIG. 12 is a plan view showing an auxiliary metal layer and an opening area in a pixel. FIG. 13 is a plan view showing a pixel electrode in a pixel. FIG. 14 is a plan view showing a light shielding layer in a pixel. FIG. 15 is a sectional view taken along line XV-XV' in FIG. 14. FIG. 16 is a sectional view taken along line XVI-XVI' in FIG. 14. FIG. 17 is a cross-sectional view taken along line XVII-XVII' in FIG. FIG. 18 is a cross-sectional view of the peripheral area. As shown in FIGS. 1, 2, and 10, the array substrate 10 is provided with a plurality of signal lines SL and a plurality of scanning lines GL in a lattice shape when viewed from above. In other words, one surface of the array substrate 10 includes a plurality of signal lines arranged at intervals in the first direction PX and a plurality of scanning lines arranged at intervals in the second direction PY.

As shown in FIG. 10, a region surrounded by adjacent scanning lines GL and adjacent signal lines SL is a pixel Pix. The pixel Pix is provided with a pixel electrode PE and a switching element Tr. In this embodiment, the switching element Tr is a bottom gate thin film transistor. The switching element Tr has a semiconductor layer SC that overlaps a gate electrode GE electrically connected to the scanning line GL in a plan view.

As shown in FIG. 10, the scanning line GL is a wiring made of metal such as molybdenum (Mo) or aluminum (Al), a laminate thereof, or an alloy thereof. The signal line SL is a wiring made of metal such as aluminum or an alloy.

As shown in FIG. 10, the semiconductor layer SC is provided so as not to protrude from the gate electrode GE in plan view. Thereby, the light source light L directed toward the semiconductor layer SC from the gate electrode GE side is reflected, making it difficult for light leakage to occur in the semiconductor layer SC.

As shown in FIGS. 5 and 10, the light source light L emitted from the light source 3 enters with the second direction PY as the incident direction. When the incident direction of the light source light L is the second direction PY, the length of the semiconductor layer SC in the first direction is smaller than the length of the semiconductor layer SC in the first direction PX. This reduces the length in the direction intersecting the incident direction of the light source light L, reducing the influence of light leakage.

As shown in FIG. 10, in the source electrode SE, the same two conductors as the signal line SL are in the same layer as the signal line SL and extend from the signal line SL in a direction intersecting the signal line. Thereby, the source electrode SE electrically connected to the signal line SL overlaps with one end portion of the semiconductor layer SC in plan view.

As shown in FIG. 10, the drain electrode DE is provided at a position between the conductors of adjacent source electrodes SE in plan view. The drain electrode DE overlaps the semiconductor layer SC in a plan view. A portion that does not overlap with the source electrode SE and drain electrode DE functions as a channel of the switching element Tr. As shown in FIG. 13, the contact electrode DEA, which is electrically connected to the drain electrode DE, is electrically connected to the pixel electrode PE through the contact hole CH.

As shown in FIG. 15, the array substrate 10 has a first transparent base material 19 made of glass, for example. The first translucent base material 19 may be a resin such as polyethylene terephthalate as long as it has translucency.

As shown in FIG. 15, a scanning line GL (see FIG. 10) and a gate electrode GE are provided on the first transparent base material 19.

As shown in FIG. 15, a first insulating layer 11 is also provided covering the scanning line GL and the gate electrode GE. The first insulating layer 11 is made of, for example, a transparent inorganic insulating material such as silicon nitride.

A semiconductor layer SC is stacked on the first insulating layer 11. The semiconductor layer SC is formed of, for example, amorphous silicon, but may be formed of polysilicon or an oxide semiconductor. When viewed in the same cross section, the length Lsc of the semiconductor layer SC is smaller than the length Lge of the gate electrode GE superimposed on the semiconductor layer SC. Thereby, the gate electrode GE can block the light Ld1 propagating through the first light-transmitting base material 19. As a result, in the switching element Tr of the first embodiment, light leakage is reduced.

A source electrode SE and a signal line SL covering a portion of the semiconductor layer SC, and a drain electrode DE covering a portion of the semiconductor layer SC are provided on the first insulating layer 11. The drain electrode DE is made of the same material as the signal line SL. A second insulating layer 12 is provided on the semiconductor layer SC, the signal line SL, and the drain electrode DE. The second insulating layer 12 is made of, for example, a transparent inorganic insulating material such as silicon nitride, similarly to the first insulating layer.

A third insulating layer covering a portion of the second insulating layer 12 is formed on the second insulating layer 12 . The third insulating layer 13 is made of a translucent organic insulating material such as acrylic resin. The third insulating layer 13 has a thicker thickness than other insulating films made of inorganic materials.

As shown in FIGS. 15, 16, and 17, there are regions where the third insulating layer 13 is present and regions where the third insulating layer 13 is not present. As shown in FIGS. 16 and 17, the region where the third insulating layer 13 is located is above the scanning line GL and above the signal line SL. The third insulating layer 13 has a lattice shape along the scanning line GL and the signal line SL and covering above the scanning line GL and the signal line SL. Further, as shown in FIG. 15, the region where the third insulating layer 13 is located is also above the semiconductor layer SC, that is, above the switching element Tr. Therefore, the switching element Tr, the scanning line GL, and the signal line SL are separated from the storage capacitor electrode ITO by a relatively long distance, so that they are less susceptible to the influence of the common potential from the storage capacitor electrode ITO. Further, in the array substrate 10, since there is a region where the third insulating layer 13 is not present in the region surrounded by the scanning line GL and the signal line SL, the thickness of the insulating layer overlapping the signal line SL and the scanning line GL in plan view is This creates a region where the thickness of the insulating layer is smaller than the thickness of the insulating layer. In the area surrounded by the scanning line GL and the signal line SL, the light transmittance is relatively improved compared to the area above the scanning line GL and above the signal line SL, and the light transmittance is improved.

As shown in FIG. 15, a metal layer TM is provided on the third insulating layer 13. The conductive metal layer TM is a wiring made of a metal such as molybdenum (Mo) or aluminum (Al), a laminate thereof, or an alloy thereof. As shown in FIG. 12, the metal layer TM is provided in a region overlapping the signal line SL, scanning line GL, and switching element Tr in plan view. As a result, the metal layer TM has a lattice shape, and an opening AP surrounded by the metal layer TM is formed.

As shown in FIG. 15, a storage capacitor electrode IO is provided on the third insulating layer 13 and the metal layer TM. The storage capacitor electrode IO is formed of a transparent conductive material such as ITO (Indium Tin Oxide). The storage capacitor electrode IO is also referred to as a third transparent electrode. As shown in FIG. 11, the storage capacitor electrode IO has a region IOX in which there is no transparent conductive material in a region surrounded by the scanning line GL and the signal line SL. The storage capacitor electrode IO is provided across a plurality of pixels Pix, spanning adjacent pixels Pix. In the storage capacitor electrode IO, a region where the transparent conductive material is located overlaps the scanning line GL or the signal line SL, and extends to the adjacent pixel Pix.

The storage capacitor electrode IO has a lattice shape along the scanning line GL and the signal line SL and covering above the scanning line GL and the signal line SL. This reduces the storage capacitance HC between the region IOX where there is no transparent conductive material and the pixel electrode PE, so the storage capacitance HC is adjusted by the size of the region IOX where there is no transparent conductive material.

As shown in FIG. 12, a switching element Tr connected to the scanning line GL and the signal line SL is provided, and at least the switching element Tr is covered with a third insulating layer 13 which is an organic insulating layer. Above the insulating layer 13, there is a metal layer TM having a larger area than the switching element Tr. Thereby, light leakage from the switching element Tr can be suppressed.

The metal layer TM may be on the storage capacitor electrode IO, and only needs to be laminated with the storage capacitor electrode IO. The metal layer TM has a lower electrical resistance than the storage capacitor electrode IO. Therefore, variations in the potential of the storage capacitor electrode IO depending on the position of the pixel Pix in the display area AA are suppressed.

As shown in FIG. 12, the width of the metal layer TM overlapping the signal line SL is larger than the width of the signal line SL in plan view. This suppresses reflected light reflected at the edge of the signal line SL from being emitted from the display panel 2. Here, the width of the metal layer TM and the width of the signal line SL are lengths in a direction intersecting the direction in which the signal line SL extends. Further, the width of the metal layer TM overlapping the scanning line GL is larger than the width of the scanning line GL. Here, the width of the metal layer TM and the width of the scanning line GL are lengths in a direction intersecting the direction in which the scanning line GL extends.

As shown in FIG. 15, a fourth insulating layer 14 is provided on the storage capacitor electrode IO and the metal layer TM. The fourth insulating layer 14 is, for example, an inorganic insulating layer formed of a transparent inorganic insulating material such as silicon nitride.

As shown in FIG. 15, a pixel electrode PE is provided on the fourth insulating layer 14. The pixel electrode PE is made of a transparent conductive material such as ITO. The pixel electrode PE is electrically connected to the contact electrode DEA through a contact hole CH provided in the fourth insulating layer 14, the third insulating layer 13, and the second insulating layer 12. As shown in FIG. 13, the pixel electrode PE is divided for each pixel Pix. A first alignment film AL1 is provided on the pixel electrode PE.

As shown in FIG. 15, the counter substrate 20 has a second light-transmitting base material 29 made of glass, for example. The second translucent base material 29 may be a resin such as polyethylene terephthalate as long as it has translucency. The second transparent base material 29 is provided with a common electrode CE. The common electrode CE is made of a transparent conductive material such as ITO. A second alignment film AL2 is provided on the surface of the common electrode CE. Further, the counter substrate 20 has a light shielding layer LS between the second transparent base material 29 and the common electrode CE. The light shielding layer LS is made of black resin or metal material. Further, a spacer PS is formed between the array substrate 10 and the counter substrate 20, and the spacer PS is between the common electrode CE and the second alignment film AL2.

As shown in FIGS. 12 and 16, in the display device of Embodiment 1, the light shielding layer GS, which is the same layer as the scanning line GL, extends along the signal line SL and overlaps a part of the signal line SL. It is set in. The light shielding layer GS is made of the same material as the scanning line GL. The light shielding layer GS is not provided at the portion where the scanning line GL and the signal line SL intersect in plan view.

As shown in FIG. 12, the light shielding layer GS and the signal line SL are electrically connected through a contact hole CHG. As a result, the wiring resistance composed of the light shielding layer GS and the signal line SL is lower than the wiring resistance of only the signal line SL. As a result, the delay of the gradation signal supplied to the signal line SL is suppressed. Note that there may be no contact hole CHG, and the light shielding layer GS and signal line SL may not be connected.

As shown in FIG. 16, the light shielding layer GS is provided on the opposite side of the metal layer TM with respect to the signal line SL. The width of the light shielding layer GS is larger than the width of the signal line SL and smaller than the width of the metal layer TM. The width of the light shielding layer GS, the width of the metal layer TM, and the width of the signal line SL are lengths in a direction intersecting the direction in which the signal line SL extends. In this way, since the light shielding layer GS is wider than the signal line SL, it suppresses reflected light reflected at the edge of the signal line SL from being emitted from the display panel 2. As a result, the visibility of images in the display device 1 is improved.

As shown in FIGS. 14 and 15, the counter substrate 20 is provided with a light shielding layer LS. The light shielding layer LS is provided in a grid pattern in a region overlapping the signal line SL, scanning line GL, and switching element Tr in plan view.

As shown in FIGS. 14, 15, 16, and 17, the light shielding layer LS has a width larger than that of the metal layer TM. This suppresses emission of reflected light reflected from the edges of the signal line SL, scanning line GL, and metal layer TM from the display panel 2. As a result, the visibility of images in the display device 1 is improved.

When the light source light L hits the contact hole CH and the contact hole CHG, diffuse reflection is likely to occur. Therefore, the light shielding layer LS is provided in a region overlapping the contact hole CH and the contact hole CHG in plan view.

Furthermore, by forming the light-shielding layer LS on the counter substrate, the transparency of the display device 1 will decrease to some extent, but the contrast and image visibility will improve. However, the light shielding layer LS may be omitted from the counter substrate 20 since high transparency of the display device 1 is important.

As shown in FIG. 15, spacers SP are arranged between the array substrate 10 and the counter substrate 20 to improve the uniformity of the distance between the array substrate 10 and the counter substrate 20.

As shown in FIG. 18, a common potential wiring COML is routed in the peripheral region FR. The common potential wiring COML includes, for example, a first common potential wiring COML1 and a second common potential wiring COML2. The first common potential wiring COML1 is electrically connected to the common electrode CE of the counter substrate 20 via a conductive member CP. The conductive member CP may be a conductive pillar or a sealing material containing conductive particles such as Au particles.

As shown in FIG. 18, in the peripheral region FR, the storage capacitor electrode IO is electrically connected to the second common potential wiring COML2. The metal layer TM is arranged in the display area AA.

FIG. 19 is an enlarged plan view showing the switching element of the first embodiment. FIG. 20 is an enlarged plan view of a switching element of a comparative example. As shown in FIGS. 19 and 20, the source electrode SE has a first straight portion SEa, a second straight portion SEb, and a connection portion SEc. The first straight portion SEa extends in the second direction. The second straight part SEb is arranged at a different position in the first direction from the first straight part SEa, and extends in the second direction. One end of the first straight portion SEa and one end of the second straight portion SEb are electrically connected through a connecting portion SEc. Thereby, the source electrode SE has a U-shape. The source electrode SE is also called a horseshoe shape.

As shown in FIG. 20, in the switching element Tr of the comparative example, there is no difference in distance in the second direction PY from the other end of the first straight portion SEa to the other end of the second straight portion SEb. When the contact hole CH of the drain electrode DE electrically connected to the pixel electrode PE is arranged at a position aligned in the second direction PY of the semiconductor layer SC, the aperture ratio of the pixel Pix increases. However, as described above, when the incident direction of the light source light L is the second direction PY, the length of the semiconductor layer SC in the first direction PX is smaller than the length of the semiconductor layer SC in the second direction PY. Therefore, the distance between the other end of the first straight portion SEa and the contact hole CH of the drain electrode DE becomes short. As a result, a hot spot HP where the leakage current increases during switching off is likely to occur near the other end of the first straight portion SEa to which the signal line SL is connected. The hot spot HP is a region where the electric field strength is the strongest because the gate electrode GE is located below the location where the signal line SL (source line) and the semiconductor layer SC (amorphous silicon) intersect at right angles. leakage current tends to flow into the pixel electrode PE.

On the other hand, as shown in FIG. 19, also in the switching element Tr of the first embodiment, the contact hole CH of the drain electrode DE electrically connected to the pixel electrode PE is located in the second direction PY of the semiconductor layer SC. are placed in line with. The other end of the first straight portion SEa and the signal line SL are connected via a detour portion SLd. In plan view, the detour portion SLd of the first embodiment extends in a first direction away from the semiconductor layer SC so as to once move away from the signal line SL, and then approaches the other end of the first straight portion SEa. As a result, there is a difference of distance D1 in the second direction from the other end of the first straight part SEa to the other end of the second straight part SEb, and the second straight part SEb is longer than the first straight part SEa. . As a result, even if a hot spot HP where the leakage current becomes large occurs near the other end of the first straight portion SEa to which the detour portion SLd is connected, the leakage current at the time of switching off becomes small. The switching element Tr of the first embodiment shown in FIG. 19 has a smaller leakage current during switching off than the switching element Tr of the comparative example shown in FIG. 20.

As described above, the display device 1 includes the array substrate 10, the counter substrate 20, the liquid crystal layer 50, and the light source 3. The array substrate 10 has a plurality of pixel electrodes PE, which are first transparent electrodes, arranged for each pixel Pix. The array substrate 10 is provided with a plurality of signal lines SL arranged at intervals in the first direction PX and a plurality of scanning lines GL arranged at intervals in the second direction PY. The counter substrate 20 has a common electrode CE, which is a second light-transmitting electrode, at a position overlapping the pixel electrode PE in plan view. The liquid crystal layer 50 includes a polymer dispersed liquid crystal LC sealed between the array substrate 10 and the counter substrate 20. The light emitting section 31 of the light source 3 emits light in the second direction PY toward the side surface of the counter substrate 20. The incident direction of light propagating through the array substrate 10 and the counter substrate 20 is the second direction. Note that the light emitting section 31 may emit light that propagates through the array substrate 10 and the counter substrate 20 toward the side surface of the array substrate 10.

The switching element has a drain electrode DE connected to the pixel electrode PE via a contact hole CH, a source electrode SE, and a gate electrode GE electrically connected to the scanning line GL. The source electrode SE includes a first straight portion SEa extending in the second direction PY, a second straight portion SEb arranged at intervals in the first direction PX and extending in the second direction PY, and one end of the first straight portion SEa. It has a connecting portion SEc that connects to one end of the second straight portion SEb. The source electrode SE has a detour portion SLd that connects the other end of the first straight portion SEa and the signal line SL. Since there is a distance D1 difference in the second direction PY from the other end of the first straight part SEa to the other end of the second straight part SEb, the first straight part SEa is shorter than the second straight part SEb. As a result, even if a hot spot HP where the leakage current becomes large occurs near the other end of the first straight portion SEa to which the detour portion SLd is connected, the leakage current at the time of switching off becomes small.

The array substrate 10 includes a third insulating layer 13 that is an organic insulating layer that covers at least the switching element Tr, a metal layer TM that is provided in an overlapping manner above the third insulating layer 13, and has a larger area than the switching element Tr. There is. In the region surrounded by the scanning line GL and the signal line SL, there is a region whose thickness is smaller than the thickness of the third insulating layer 13 that overlaps the scanning line GL and the signal line SL in a plan view. Therefore, a slope is formed in which the thickness of the third insulating layer 13 on the side closer to the light source 3 than the switching element Tr changes in plan view. As shown in FIGS. 5 and 20, the light source light L emitted from the light source 3 enters with the second direction PY as the incident direction. As shown in FIG. 15, the above-mentioned slopes include the first slope 13F of the third insulating layer 13 on the side where the light Lu of the light source light L is incident, and the third insulating layer 13F on the side opposite to the side where the light Lu is incident. and a second slope 13R of the layer 13. As shown in FIG. 15, the first slope 13F of the third insulating layer 13 on the side where the light Lu enters is covered with a metal layer TMt. Here, the metal layer TMt is formed of the same material as the metal layer TM, and is a tapered portion formed by extending the metal layer TM.

As shown in FIG. 15, the light Lu arrives in the incident direction. The light Lu is part of the light source light L that reaches from the side closer to the light source 3 than the switching element Tr. Here, since the metal layer TMt blocks the light Lu, light leakage is reduced.

When the second slope 13R is covered with a metal layer TM and the background of the counter substrate 20 is visible from the array substrate 10, the light Ld2 seen by the observer is reflected on the metal layer TM covering the second slope 13R, and the reflected light is It may be visible to the observer. In the first embodiment, there is no metal layer TM covering the second slope 13R. Therefore, in the display device of Embodiment 1, reflected light that hinders visual recognition by an observer is reduced.

(Embodiment 2)
FIG. 21 is an enlarged plan view showing the switching element of the second embodiment. Components that are the same as those described in the present embodiment described above are given the same reference numerals and redundant explanations will be omitted.

As shown in FIG. 21, also in the switching element Tr of Embodiment 2, the contact holes CH of the drain electrode DE electrically connected to the pixel electrode PE are arranged at positions lined up in the second direction PY of the semiconductor layer SC. be done. The other end of the first straight portion SEa and the signal line SL are connected via a detour portion SLd.

In the detour portion SLd of the second embodiment, the first conductive wiring SLd1, the second conductive wiring SLd2, and the third conductive wiring SLd3 are electrically connected. The third conductive wiring SLd3 is electrically connected to the signal line SL in plan view and extends in the first direction away from the semiconductor layer SC. More specifically, the third conductive wiring SLd3 extends in an oblique direction away from the semiconductor SC from the first direction PX or the second direction PY. The second conductive wiring SLd2 is electrically connected to the third conductive wiring SLd3 and extends from the third conductive wiring SLd3 in the second direction PY. The first conductive wiring SLd1 is electrically connected to the second conductive wiring SLd2, and extends from the second conductive wiring SLd2 toward the other end of the first straight portion SEa. More specifically, the first conductive wiring SLd1 extends in an oblique direction from the first direction PX and the second direction PY so as to approach the other end of the first straight portion SEa. Note that the second conductive wiring SLd2 may not be provided, and the first conductive wiring SLd1 is electrically connected to the third conductive wiring SLd3 so that it approaches the other end of the first straight portion SEa from the third conductive wiring SLd3. It may be made to extend. In this case, the first conductive wiring SLd1 and the third conductive wiring SLd3 form a V-shape in plan view. There is a distance D1 difference in the second direction PY from the other end of the first straight portion SEa to the other end of the second straight portion SEb, and the second straight portion SEb is longer than the first straight portion SEa. As a result, even if a hot spot HP where the leakage current becomes large occurs near the other end of the first straight portion SEa to which the detour portion SLd is connected, the leakage current at the time of switching off becomes small. The switching element Tr of the second embodiment shown in FIG. 21 has a smaller leakage current during switching off than the switching element Tr of the comparative example shown in FIG. 20.

The first conductive wiring SLd1 extends so as to have a first angle α1 with the second direction PY. The first angle α1 is, for example, 45°. The light source light L is not blocked by the metal layer TMt and the metal layer TM shown in FIG. 15, and hits the first conductive wiring SLd1, so that reflected light is likely to occur. When the first conductive wiring SLd1 extends diagonally with respect to the second direction PY, the light source light L is reflected at the edge of the first conductive wiring SLd1 in a direction different from the second direction PY, making it less noticeable. The first angle α1 is an acute angle, and is preferably 30° or more and 85° or less, so that the reflected light from the light source light L reflected at the detour portion SLd is less noticeable. When the first angle α1 is greater than or equal to 45° and less than or equal to 60°, reflected light from the light source light L reflected at the detour portion SLd becomes less noticeable. Further, the detour portion SLd is not limited to the above-mentioned shape, but may be an arcuate shape.

(Embodiment 3)
FIG. 22 is an enlarged plan view showing the switching element of the third embodiment. Components that are the same as those described in the present embodiment described above are given the same reference numerals and redundant explanations will be omitted.

As shown in FIG. 22, the first side of the first conductive wiring SLd1 forms a first angle α1 with the second direction PY, and the second side of the first conductive wiring SLd1 forms a second angle α2 with the second direction PY. ing. The first side of the first conductive wiring SLd1 is on the side closer to the light source 3. The second side of the first conductive wiring SLd1 is on the far side from the light source 3. The direction in which the first side of the first conductive wiring SLd1 extends is oblique to the second direction PY. The light source light L is not blocked by the metal layer TMt and the metal layer TM shown in FIG. 15, and hits the first side of the first conductive wiring SLd1, so that reflected light is likely to occur. When the first side of the first conductive wiring SLd1 forms a first angle α1 with the second direction PY, the light source light L is reflected at the first side of the first conductive wiring SLd1 in a direction different from the second direction PY. Hard to stand out. The first angle α1 is an acute angle, and is preferably 30° or more and 85° or less, so that the reflected light from the light source light L reflected at the detour portion SLd is less noticeable. When the first angle α1 is greater than or equal to 45° and less than or equal to 60°, reflected light from the light source light L reflected at the detour portion SLd becomes less noticeable.

The second angle α2 is larger than the first angle α1. Thereby, the width of the first conductive wiring SLd1 increases as it approaches the first straight portion SEa, and the wiring resistance of the detour portion SLd is reduced.

In the third embodiment as well, there is a difference of distance D1 in the second direction PY from the other end of the first straight part SEa to the other end of the second straight part SEb, and the second straight part SEb is longer than the first straight part SEa. is also longer. Thereby, even if a hot spot HP where the leakage current becomes large occurs near the other end of the first straight portion SEa to which the detour portion SLd is connected, the leakage current at the time of switching off becomes small.

(Modified example)
Embodiments 1 to 3 have been described assuming that the switching element Tr is of the bottom gate type, but as described above, the switching element Tr is not limited to the bottom gate structure but may be of the top gate type. If the switching element Tr is a top gate type, the semiconductor layer SC is arranged between the first light-transmitting base material 19 and the first insulating layer, and the gate electrode GE is The source electrode SE and the contact electrode DEA are arranged between the first insulating layer 11 and the second insulating layer 12, and the source electrode SE and the contact electrode DEA are formed between the second insulating layer 12 and the third insulating layer 13.

Furthermore, regarding the common potential, it may be a common potential that is supplied with a DC voltage, that is, a constant common potential, or a common potential that is shared with an AC voltage, that is, a common potential that has two upper and lower limits. good. Regardless of whether the common potential is direct current or alternating current, a common potential is supplied to the storage capacitor electrode IO and the common electrode CE.

Furthermore, regarding the third insulating layer 13 which is a lattice-shaped organic insulating film, the structure is such that the third insulating layer 13 inside the lattice-like structure is completely removed and the underlying second insulating layer 12 and the storage capacitor electrode IO are exposed. Although disclosed, it is not limited to this. For example, a structure may be employed in which a part of the thickness of the third insulating layer 13 is left thin by halftone exposure on the inside of the lattice-shaped region surrounded by the plurality of signal lines SL and the plurality of scanning lines GL. As a result, the third insulating layer 13 has a thinner film thickness inside the lattice area than the lattice area surrounded by the plurality of signal lines SL and the plurality of scanning lines GL.

Although preferred embodiments have been described above, the present disclosure is not limited to such embodiments. The contents disclosed in the embodiments are merely examples, and various changes can be made without departing from the spirit of the present disclosure. Appropriate changes made without departing from the spirit of the present disclosure also naturally fall within the technical scope of the present disclosure.

1 Display device 2 Display panel 3 Light source 4 Drive circuit 9 Upper control unit 10 Array substrate 13F First slope 13R Second slope 18 Sealing part 20 Counter substrate AA Display area AP Opening CE Common electrode CH Contact hole CP Conductive member D1 Distance DE Drain electrode DEA Contact electrode FR Peripheral region GE Gate electrode GL Scanning line GS Light shielding layer HC Holding capacitor HP Hot spot IO Holding capacitor electrode ITO Holding capacitor electrode L Light source light LC Polymer dispersed liquid crystal LS Light blocking layer Ld1, Ld2, Lu Light PE Pixel electrode PX First direction PY Second direction PZ Third direction SC Semiconductor layer SE Source electrode SEa First straight section SEb Second straight section SEc Connection section SL Signal line SLd Detour section SLd1 First conductive wiring SLd2 Second conductive wiring SLd3 Third conductive wiring TM, TMt Metal layer Tr Switching element α1 First angle α2 Second angle

Claims (9)

an array board;
a counter substrate;
a liquid crystal layer between the array substrate and the counter substrate;
a light source arranged so that light enters a side surface of the array substrate or a side surface of the counter substrate,
The array substrate is
a plurality of signal lines lined up at intervals in a first direction;
a plurality of scanning lines lined up at intervals in a second direction;
a switching element connected to the scanning line and the signal line,
The switching element is
a drain electrode connected to the pixel electrode via a contact hole;
a source electrode;
a gate electrode electrically connected to the scanning line;
a semiconductor layer that overlaps the gate electrode in plan view;
The source electrode is
a first straight portion extending in the second direction;
a second linear part arranged at intervals in the first direction with respect to the first linear part and extending in the second direction;
a connecting part connecting one end of the first straight part and one end of the second straight part,
a detour portion connecting the other end of the first straight portion and the signal line;
The drain electrode is arranged between the first linear part and the second linear part in a plan view,
The detour section is
a first conductive wire that extends toward the other end of the first straight portion and is connected to the vicinity of the other end of the first straight portion; and a second conductive wire that extends in the second direction and connects to the first conductive wire. having a conductive wiring;
Among the directions in which the first conductive wiring extends from a position where it connects to the second conductive wiring to approach the other end of the first straight portion, a component in the first direction is a direction that approaches the semiconductor,
An edge of the semiconductor layer crosses the first conductive wiring in a plan view,
A first side of the first conductive wiring closer to the light source extends obliquely to the second direction,
The first angle formed by the first side and the second direction is an acute angle,
A second angle formed by a second side of the first conductive wiring on a side farther from the light source and the second direction is larger than the first angle.
Display device. an array board;
a counter substrate;
a liquid crystal layer between the array substrate and the counter substrate;
between the array substrate and the counter substrate, a light source that emits light so that the light propagates from one side of the counter substrate toward the other side;
The array substrate is
a plurality of signal lines lined up at intervals in a first direction;
a plurality of scanning lines lined up at intervals in a second direction;
a switching element connected to the scanning line and the signal line,
The switching element is
a drain electrode connected to the pixel electrode via a contact hole;
a source electrode;
a gate electrode electrically connected to the scanning line;
a semiconductor layer that overlaps the gate electrode in plan view;
The source electrode is
a first straight portion extending in the second direction;
a second linear part arranged at intervals in the first direction with respect to the first linear part and extending in the second direction;
a connecting part connecting one end of the first straight part and one end of the second straight part,
a detour portion connecting the other end of the first straight portion and the signal line;
The drain electrode is arranged between the first linear part and the second linear part in a plan view,
The detour section is
a first conductive wire that extends toward the other end of the first straight portion and is connected to the vicinity of the other end of the first straight portion; and a second conductive wire that extends in the second direction and connects to the first conductive wire. having a conductive wiring;
Among the directions in which the first conductive wiring extends from a position where it connects to the second conductive wiring toward the other end of the first straight portion, a component in the first direction is a direction that approaches the semiconductor;
An edge of the semiconductor layer crosses the first conductive wiring in a plan view,
A first side of the first conductive wiring closer to the light source extends obliquely to the second direction,
The first angle formed by the first side and the second direction is an acute angle,
A second angle formed by a second side of the first conductive wiring on a side farther from the light source and the second direction is larger than the first angle.
Display device. an array board;
a counter substrate;
a liquid crystal layer between the array substrate and the counter substrate;
a light source arranged so that light enters a side surface of the array substrate or a side surface of the counter substrate,
The array substrate is
a plurality of signal lines lined up at intervals in a first direction;
a plurality of scanning lines lined up at intervals in a second direction;
a switching element connected to the scanning line and the signal line;
an organic insulating layer covering at least the switching element;
a metal layer provided in an overlapping manner above the organic insulating layer,
The switching element is
a drain electrode connected to the pixel electrode via a contact hole;
a source electrode;
a gate electrode electrically connected to the scanning line;
a semiconductor layer that overlaps the gate electrode in plan view;
The source electrode is
a first straight portion extending in the second direction;
a second linear part arranged at intervals in the first direction with respect to the first linear part and extending in the second direction;
a connecting part connecting one end of the first straight part and one end of the second straight part,
a detour portion connecting the other end of the first straight portion and the signal line;
The drain electrode is arranged between the first linear part and the second linear part in a plan view,
The detour section is
a first conductive wire that extends toward the other end of the first straight portion and is connected to the vicinity of the other end of the first straight portion; and a second conductive wire that extends in the second direction and connects to the first conductive wire. having a conductive wiring;
Among the directions in which the first conductive wiring extends from a position where it connects to the second conductive wiring toward the other end of the first straight portion, a component in the first direction is a direction that approaches the semiconductor;
An edge of the semiconductor layer crosses the first conductive wiring in a plan view,
In a region surrounded by the scanning line and the signal line, there is a region where the thickness of the organic insulating layer is smaller than the thickness of the organic insulating layer overlapping the scanning line and the signal line in plan view;
A display device, wherein a first slope of the organic insulating layer that is closer to the light source than the switching element is covered with the metal layer. an array board;
a counter substrate;
a liquid crystal layer between the array substrate and the counter substrate;
between the array substrate and the counter substrate, a light source that emits light so that the light propagates from one side of the counter substrate toward the other side;
The array substrate is
a plurality of signal lines lined up at intervals in a first direction;
a plurality of scanning lines lined up at intervals in a second direction;
a switching element connected to the scanning line and the signal line;
an organic insulating layer covering at least the switching element;
a metal layer provided in an overlapping manner above the organic insulating layer,
The switching element is
a drain electrode connected to the pixel electrode via a contact hole;
a source electrode;
a gate electrode electrically connected to the scanning line;
a semiconductor layer that overlaps the gate electrode in plan view;
The source electrode is
a first straight portion extending in the second direction;
a second linear part arranged at intervals in the first direction with respect to the first linear part and extending in the second direction;
a connecting part connecting one end of the first straight part and one end of the second straight part,
a detour portion connecting the other end of the first straight portion and the signal line;
The drain electrode is arranged between the first linear part and the second linear part in a plan view,
The detour section is
a first conductive wire that extends toward the other end of the first straight portion and is connected to the vicinity of the other end of the first straight portion; and a second conductive wire that extends in the second direction and connects to the first conductive wire. having a conductive wiring;
Among the directions in which the first conductive wiring extends from a position where it connects to the second conductive wiring toward the other end of the first straight portion, a component in the first direction is a direction that approaches the semiconductor;
An edge of the semiconductor layer crosses the first conductive wiring in a plan view,
In a region surrounded by the scanning line and the signal line, there is a region where the thickness of the organic insulating layer is smaller than the thickness of the organic insulating layer overlapping the scanning line and the signal line in plan view;
A display device, wherein a first slope of the organic insulating layer that is closer to the light source than the switching element is covered with the metal layer. 5. The display device according to claim 3, wherein a second slope of the organic insulating layer located on a side farther from the light source than the switching element is not covered with the metal layer. 6. The display device according to claim 3, wherein the first conductive wiring extends obliquely with respect to the second direction. 7. The display device according to claim 6, wherein the angle between the extending direction of the first conductive wiring and the second direction is an acute angle. The display device according to claim 1 , wherein the first linear portion is shorter than the second linear portion. The liquid crystal layer is a polymer dispersed liquid crystal,
The display device according to any one of claims 1 to 8, wherein a background of the opposing substrate is visible from the array substrate, and a background of the array substrate is visible from the opposing substrate.

Images