Electrooptical apparatus and electronic apparatus
By optimizing the arrangement and overlap of light-emitting regions and colored layers in electro-optical devices, the issue of color change variation with viewing angles is addressed, resulting in consistent color perception across different directions.
Patent Information
- Application Number
- JP2023109799
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-07-04
- Publication Date
- 2025-01-20
AI Technical Summary
Existing electro-optical devices using OLEDs with color filters experience significant color change variations based on viewing angles, particularly when viewed diagonally, due to differences in color layer arrangements and distances.
The device incorporates specific arrangements of light-emitting regions and colored layers, including overlapping and adjacent configurations of red, green, and blue regions, with optimized optical distances and colored layer placements to minimize color changes across different viewing angles.
This configuration reduces color variation across various viewing angles, ensuring consistent color perception regardless of the viewing direction, thereby enhancing display quality.
Smart Images

Figure 2025007997000001_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to an electro-optical device and an electronic device. [Background technology]
[0002] In electro-optical devices using, for example, OLEDs as light-emitting elements, a technology is known in which a colored layer that transmits light in a predetermined wavelength range, i.e., a color filter, is provided on a sealing layer that covers the light-emitting elements to realize color display. Note that OLED is an abbreviation for Organic Light Emitting Diode. In such electro-optical devices, one dot of color is expressed by a pixel section corresponding to multiple colors, typically a red pixel section, a green pixel section, and a blue pixel section.
[0003] The areas of the light-emitting regions in the red, green and blue pixel portions are often determined taking into consideration the light-emitting efficiency, visibility, life of the light-emitting layers and the like. For example, the technology described in Patent Document 1 describes a configuration in which, of four octagonal regions arranged in two rows and two columns to express the color of one dot, a red light emitting region is assigned to one, a green light emitting region to one, and blue light emitting regions to the remaining two. Specifically, in the two rows and two columns arrangement, two blue light emitting regions are assigned to diagonal positions, and a red light emitting region and a green light emitting region are assigned to the remaining two.
[0004] In such an arrangement, if the distance between adjacent colored layers differs, color change will increase depending on the viewing angle, so in the technology described in Patent Document 1, contact regions are provided at positions that overlap with the intersections of the boundaries that separate the light-emitting regions in a plan view. This makes the distances between the light-emitting regions more uniform, suppressing color change due to viewing angle. [Prior art documents] [Patent documents]
[0005] [Patent Document 1] JP 2019-117941 A Summary of the Invention [Problem to be solved by the invention]
[0006] However, in the technology described in Patent Document 1, color change due to viewing angle is suppressed when viewed in the row or column direction, but in an oblique direction, light-emitting regions and colored layers of the same color are continuous. Therefore, the technology described in Patent Document 1 has a problem in that the degree of color change differs when viewed in the row (horizontal) or column (vertical) direction and when viewed in an oblique direction. [Means for solving the problem]
[0007] An electro-optical device according to one aspect of the present disclosure includes a first light-emitting region that emits light in a first wavelength range in a plan view, a first colored layer that transmits light in the first wavelength range, a second light-emitting region that is disposed adjacent to the first light-emitting region in a first direction and emits light in a second wavelength range, a second colored layer that is provided so as to overlap with the second light-emitting region and transmits light in the second wavelength range, a third light-emitting region that is disposed adjacent to the second light-emitting region in a second direction and emits light in a third wavelength range, a third colored layer that is provided so as to overlap with the third light-emitting region and transmits light in the third wavelength range, and a second colored layer that intersects the second light-emitting region in the first direction and the second direction. the fourth light-emitting region is arranged adjacent to the fourth direction and emits light in the second wavelength range; and a fourth colored layer is arranged to overlap the fourth light-emitting region and transmits light in the second wavelength range, the first colored layer includes a first region that overlaps with the first light-emitting region in a planar view and a second region that is located between the second light-emitting region and the fourth light-emitting region in a planar view, and the third colored layer includes a third region that overlaps with the third light-emitting region in a planar view and a fourth region that is located between the second light-emitting region and the fourth light-emitting region in a planar view, and the second region and the fourth region at least partially overlap in a planar view. [Brief description of the drawings]
[0008] [Figure 1]1 is a diagram illustrating a configuration of an electro-optical device according to an embodiment. [Diagram 2] FIG. 2 is a block diagram showing an electrical configuration of the electro-optical device. [Diagram 3] 1 is a circuit diagram illustrating a pixel portion in an electro-optical device. [Figure 4] 4 is a timing chart showing the operation of the electro-optical device. [Diagram 5] FIG. 2 is a plan view showing an arrangement of pixel units in an electro-optical device. [Figure 6] FIG. 2 is a plan view showing a pixel electrode in the electro-optical device. [Figure 7] FIG. 2 is a plan view showing the arrangement of colored layers in an electro-optical device. [Figure 8] FIG. 2 is a plan view showing the shape of a colored layer. [Figure 9] FIG. 4 is a diagram for explaining overlapping of colored layers. [Figure 10] FIG. 2 is a cross-sectional view of a main part of a pixel portion. [Figure 11] FIG. 2 is a cross-sectional view of a main part of a pixel portion. [Figure 12] FIG. 2 is a cross-sectional view of a main part of a pixel portion. [Figure 13] FIG. 2 is a cross-sectional view of a main part of a pixel portion. [Figure 14] FIG. 11 is a diagram for explaining the effect of the embodiment. [Figure 15] FIG. 11 is an explanatory diagram of viewing angle characteristics. [Figure 16] FIG. 11 is a diagram showing a comparison of color changes between the embodiment and the first reference example. [Figure 17] FIG. 11 is a plan view showing an arrangement of pixel electrodes according to a first modified example. [Figure 18] FIG. 11 is a plan view showing an arrangement of pixel electrodes according to a second modified example. [Figure 19] FIG. 13 is a plan view showing an arrangement of pixel electrodes according to a third modified example. [Figure 20] 13 is a diagram for explaining the shape and overlap of colored layers according to a fourth modified example. FIG. [Figure 21] FIG. 13 is a plan view showing a light-emitting region of a pixel portion in a fifth modified example. [Figure 22] FIG. 1 is a perspective view showing a head mounted display using an electro-optical device. [Figure 23] FIG. 2 is a diagram showing an optical configuration of a head mounted display. [Figure 24] FIG. 11 is a plan view showing the arrangement of colored layers in an electro-optical device according to a first reference example. [Diagram 25] FIG. 11 is an explanatory diagram of the viewing angle characteristics of the first reference example. [Figure 26] FIG. 11 is a plan view showing the arrangement of colored layers in an electro-optical device according to a second reference example. [Figure 27] FIG. 13 is a diagram for explaining a problem in the second reference example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0009] Hereinafter, electro-optical devices according to embodiments of the present invention will be described with reference to the drawings. In each drawing, the dimensions and scale of each part are appropriately different from the actual ones. In addition, the embodiments described below are preferred specific examples, and therefore various technically preferable limitations are attached, but the scope of the present invention is not limited to these embodiments unless otherwise specified in the following description to the effect that the present invention is limited.
[0010] <Electro-optical device according to an embodiment> FIG. 1 is a perspective view showing an electro-optical device 10 according to an embodiment, and FIG. 2 is a block diagram showing the electrical configuration of the electro-optical device 10. As shown in FIG. The electro-optical device 10 is a micro display panel that displays color images in, for example, a head mounted display. The electro-optical device 10 includes a plurality of pixel units and a driving circuit that drives the pixel units. The pixel units and the driving circuit are integrated on a semiconductor substrate. The semiconductor substrate is typically a silicon substrate, but may be another type of semiconductor substrate.
[0011] The electro-optical device 10 is housed in a frame-shaped case 192 that opens in the display region 100. One end of an FPC board 194 is connected to the electro-optical device 10. FPC is an abbreviation for Flexible Printed Circuits. The other end of the FPC board 194 is provided with a plurality of terminals 196 for connecting to a host device (not shown). When the plurality of terminals 196 are connected to the host device, video data, synchronization signals, and the like are supplied to the electro-optical device 10 from the host device via the FPC board 194.
[0012] In the figure, the X direction is the extension direction of the scanning lines in the electro-optical device 10, which corresponds to the horizontal direction in terms of the display screen, and the Y direction is the extension direction of the data lines, which corresponds to the vertical direction in terms of the display screen. The two-dimensional plane defined by the X and Y directions is the substrate surface of the semiconductor substrate. The Z direction is perpendicular to the X and Y directions and corresponds to the emission direction of light emitted from the light-emitting element. In this description, a plan view refers to a view of the semiconductor substrate from the opposite direction to the Z direction, and a cross-sectional view refers to a view of the semiconductor substrate cut in a direction perpendicular to the substrate surface.
[0013] As shown in FIG. 2, the electro-optical device 10 is roughly divided into a control circuit 30, a data signal output circuit 50, a display area 100, and a scanning line driving circuit 120. In the display region 100, m rows of scanning lines 12 are provided along the X direction, and (3n) columns of data lines 14 are provided along the Y direction so as to be electrically insulated from each other of the scanning lines 12. Here, m and n are integers of 2 or more.
[0014] In the display region 100, pixel sections 110 are provided corresponding to the intersections of m rows of scanning lines 12 and (3n) columns of data lines 14. Therefore, the pixel sections 110 are arranged in a matrix of m rows by (3n) columns. To distinguish the rows of the matrix arrangement, they may be referred to as 1, 2, 3, ..., (m-1), mth row from the top in the figure. Similarly, to distinguish the columns of the matrix, they may be referred to as 1, 2, 3, ..., (3n-2), (3n-1), (3n)th column from the left in the figure. In addition, an integer i of 1 or more and m or less is used to generalize the scanning lines 12. Similarly, an integer j of 1 or more and (3n) or less is used to generalize the data lines 14.
[0015] The control circuit 30 controls each part based on video data Vid and a synchronous signal Sync supplied from a host device (not shown). Specifically, the control circuit 30 generates various control signals for controlling each part. The video data Vid specifies the gradation level of a pixel in an image to be displayed, for example, in 8 bits. The synchronization signal Sync includes a vertical synchronization signal that instructs the start of vertical scanning of the video data Vid, a horizontal synchronization signal that instructs the start of horizontal scanning, and a dot clock signal that indicates the timing of one pixel of the video data.
[0016] In this embodiment, the pixels of an image to be displayed and the pixel units 110 in the display area 100 correspond one-to-one. The luminance characteristics at the gradation level indicated by the video data Vid supplied from the host device do not necessarily match the luminance characteristics of the OLED included in the pixel unit 110. Therefore, in order to make the OLED emit light at a luminance corresponding to the gradation level indicated by the video data Vid, the control circuit 30 up-converts the 8 bits of the video data Vid to, for example, 10 bits and outputs it as video data Vdata. Therefore, the 10-bit video data Vdata becomes data corresponding to the gradation level specified by the video data Vid. For the up-conversion, a look-up table is used that stores in advance the correspondence between 8 bits of input video data Vid and 10 bits of output video data Vdata.
[0017] The scanning line driving circuit 120 is a circuit for driving the pixel units 110 arranged in m rows (3n) columns, row by row, under the control of the control circuit 30. For example, the scanning line driving circuit 120 supplies scanning signals / Gwr(1), / Gwr(2), ..., / Gwr(m-1), / Gwr(m) to the 1st, 2nd, 3rd, ..., (m-1), and mth scanning lines 12 in that order. In general, the scanning signal supplied to the i-th scanning line 12 is represented as / Gwr(i).
[0018] The data signal output circuit 50 is a circuit that outputs a data signal via the data lines 14 to the pixel units 110 located in a row selected by the scanning line driving circuit 120 under the control of the control circuit 30. The data signal is a voltage signal obtained by converting 10-bit video data Vdata into analog. That is, the data signal output circuit 50 converts one row of video data Vdata corresponding to the pixel units 110 in columns 1 to (3n) in the selected row into analog, and outputs it to the data lines 14 in columns 1 to (3n) in this order.
[0019] In the figure, the data signals output to the data lines 14 in the 1st, 2nd, 3rd, ..., (3n-2), (3n-1), and (3n)th columns are represented as Vd(1), Vd(2), Vd(3), ..., Vd(3n-2), Vd(3n-1), and Vd(3n), respectively. In general, the potential of the data line 14 in the jth column is represented as Vd(j).
[0020] 2, in the display region 100, the pixel units 110 are electrically arranged such that the R pixel units 110, the B pixel units 110, and the G pixel units 110 are arranged along the X direction, and the pixel units 110 of the same color are arranged along the Y direction. Therefore, when focusing on any one column of data lines 14, the pixel units 110 of the same color correspond to it. Note that one color is expressed by additive color mixing of the RBG pixel units 110 adjacent in the X direction. For this reason, strictly speaking, the pixel units 110 should be called sub-pixel units, but for convenience of explanation, they are referred to as pixel units.
[0021] Moreover, the arrangement of pixel section 110 shown in FIG. 2 is only from an electrical perspective, and in reality, light-emitting regions are arranged in the pixel section of each color as shown in FIG. 5, which will be described later.
[0022] 3 is a diagram showing the electrical configuration of the pixel section 110 in the electro-optical device 10. The pixel sections 110 arranged in 1080 rows (3n) columns are electrically identical to one another. For this reason, the pixel sections 110 will be described by taking as a representative one the pixel section 110 corresponding to the i-th row and j-th column.
[0023] As shown in the figure, the pixel section 110 includes, from an electrical perspective, P-channel MOS type transistors 121 and 122, an OLED 130, and a capacitance element 140. In the description of the pixel unit 110, the term "electrically" is used to refer to the multiple elements that make up the pixel unit 110 and the connections between these multiple elements. This expression is used because the pixel unit 110 includes elements that do not contribute to the electrical connections from a mechanical or physical perspective.
[0024] The OLED 130 is an example of a light-emitting element, and has a light-emitting layer 132 sandwiched between a pixel electrode 131 and a common electrode 133. The pixel electrode 131 functions as an anode, and the common electrode 133 functions as a cathode. Details of the OLED 130 will be described later, but when a current flows from the anode to the cathode, holes injected from the anode and electrons injected from the cathode recombine in the light-emitting layer 132 to generate excitons, thereby generating white light. The generated white light resonates in an optical resonator composed of a reflective electrode and a common electrode 133 of a semi-reflective and semi-transmissive layer, both of which are omitted in Fig. 3, and is emitted at a resonant wavelength set corresponding to one of the colors red, green, and blue. A color filter corresponding to the color is provided on the light emission side from the optical resonator. Therefore, the light emitted from the OLED 130 is colored by the optical resonator and the color filter, and is then visually recognized by the observer.
[0025] In the transistor 121 of the pixel portion 110 in the i-th row and j-th column, the gate node g is connected to the drain node of the transistor 122, the source node is connected to the power supply line 116 of the voltage Vel, and the drain node is connected to the pixel electrode 131 which is the anode of the OLED 130. In the transistor 122 of the pixel unit 110 in the i-th row and j-th column, the gate node is connected to the i-th row scan line 12 and the source node is connected to the j-th column data line 14. The common electrode 133 functioning as the cathode of the OLED 130 is connected to the power supply line 118 of the voltage Vct. In addition, since the electro-optical device 10 is formed on a silicon substrate, the substrate potential of the transistors 121 and 122 is set to a potential equivalent to the voltage Vel, for example.
[0026] The pixel unit 110 shown in Fig. 3 is common to each of the colors red, green, and blue from an electrical standpoint, and has been generally described without specifying the color, but structurally, each color is different. Therefore, when describing the pixel units by color, they are referred to as pixel units 110R, 110G, and 110B. Similarly, when describing the OLED 130 and pixel electrode 131 by color, they are referred to as OLED 130R, 130G, and 130B, and pixel electrodes 131R, 131G, and 131B.
[0027] FIG. 4 is a timing chart illustrating the operation of the electro-optical device 10. As shown in FIG. In the electro-optical device 10, m scanning lines 12 are scanned one by one during a frame (V) period in the order of 1st, 2nd, 3rd, ..., mth rows. In detail, as shown in the figure, the scanning signals / Gwr(1), / Gwr(2), ..., / Gwr(m-1), / Gwr(m) are sequentially and exclusively set to L level by the scanning line driving circuit 120 for each horizontal scanning period (H). In this embodiment, the periods during which adjacent scanning signals / Gwr(1) to / Gwr(m) are at L level are separated in time. Specifically, after scanning signal / Gwr(i-1) changes from L level to H level, the next scanning signal / Gwr(i) becomes L level after a period. This period corresponds to the horizontal blanking period.
[0028] In this description, the period of one frame (V) refers to the period required to display one frame of an image specified by the video data Vid. If the length of the period of one frame (V) is the same as the vertical synchronization period, for example, if the frequency of the vertical synchronization signal included in the synchronization signal Sync is 60 Hz, it is 16.7 milliseconds, which corresponds to one cycle of the vertical synchronization signal. Also, the horizontal scanning period (H) is the time interval during which the scanning signals / Gwr(1) to / Gwr(m) sequentially become L level, but for convenience in the figure, the start timing of the horizontal scanning period (H) is set to approximately the center of the horizontal blanking period.
[0029] When a scanning signal among the scanning signals / Gwr(1) to / Gwr(m), for example a scanning signal / Gwr(i) supplied to the scanning line 12 in the i-th row, goes to the L level, the transistor 122 in the pixel unit 110 in the i-th row and j-th column, for example, goes to the ON state. As a result, the gate node g of the transistor 121 in the pixel unit 110 is electrically connected to the j-th column data line 14.
[0030] In this description, the "on state" of a transistor means that the source node and drain node of the transistor are electrically closed and in a low impedance state, and the "off state" of a transistor means that the source node and drain node are electrically open and in a high impedance state. In this description, "electrically connected" or simply "connected" means a state in which two or more elements are directly or indirectly connected or coupled. "Electrically not connected" or simply "not connected" means a state in which two or more elements are not directly or indirectly connected or coupled.
[0031] In a horizontal scanning period (H) when the scanning signal / Gwr(i) is at L level, the data signal output circuit 50 converts the grayscale levels of the pixels in the i-th row, 1st column to the i-th row, n-th column indicated by the video data Vdata into analog potentials Vd(1) to Vd(n) and outputs them as data signals to the 1st to nth column data lines 14. In terms of the j-th column, the data signal output circuit 50 converts the grayscale level d(i,j) of the pixel in the i-th row, j-th column to an analog signal potential Vd(j) and outputs it as a data signal to the j-th column data line 14. In addition, during the horizontal scanning period (H) when the scanning signal / Gwr(i-1) one row before the scanning signal / Gwr(i) is at the L level, the data signal output circuit 50 converts the gradation level d(i-1, j) of the pixel in the (i-1)th row and jth column into an analog signal potential Vd(j) and outputs it as a data signal to the data line 14 in the jth column.
[0032] The data signal of the potential Vd(j) is applied to the gate node g of the transistor 121 in the pixel unit 110 in the i-th row and j-th column via the j-th data line 14, and the potential Vd(j) is held by the capacitance element 140. Therefore, the transistor 121 passes a current to the OLED 130 according to the voltage between the gate node and the source node. Even when the scanning signal Gwr(i) becomes H level and the transistor 122 is turned off, the potential Vd(j) is held by the capacitance element 140, so that a current continues to flow through the OLED 130. Therefore, in the pixel unit 110 in the i-th row and j-th column, the OLED 130 continues to emit light with a brightness according to the voltage held by the capacitance element 140, i.e., the gradation level, until the period of one frame (V) has elapsed and the transistor 122 is turned on again and the voltage of the data signal is applied again.
[0033] Although the pixel unit 110 in the i-th row and j-th column has been described here, the OLEDs 130 of the pixel units 110 in the i-th row and other columns than the j-th column also emit light at the luminance indicated by the video data Vdata. Also, the OLEDs 130 of the pixel units 110 in rows other than the i-th row emit light with the luminance indicated by the video data Vdata as the scanning signals / Gwr(1) to / Gwr(m) sequentially go to the L level. Therefore, in the electro-optical device 10, in a period of one frame (V), the OLEDs 130 in all the pixel sections 110 from row 1, column 1 to row m, column n emit light at the luminance indicated by the video data Vdata, thereby displaying one frame of an image.
[0034] Fig. 5 is a plan view showing the arrangement of pixel units 110 in a display region 100 in an electro-optical device, and Fig. 6 is a plan view showing the shape of pixel electrodes. Fig. 7 is a plan view showing the arrangement of colored layers. In Figs. 5, 6, and 7, the E direction is the direction obtained by rotating the X direction by 45 degrees counterclockwise, and the F direction is the direction obtained by rotating the E direction by 90 degrees counterclockwise.
[0035] In display region 100, the color of one dot is expressed by additive color mixing of emitted light from four light-emitting regions surrounded by frame Dp in Fig. 5. Specifically, in frame Dp, light-emitting regions R, G1, G2, and B are arranged in two rows and two columns, of which light-emitting regions R and B are arranged on one diagonal of the two rows and two columns, and light-emitting regions G1 and G2 are arranged on the other diagonal. 6, the light-emitting region R is a region of the pixel electrode 131R that contacts the light-emitting layer 132. The light-emitting regions G1 and G2 are regions of the pixel electrode 131G that contacts the light-emitting layer 132. The light-emitting region B is a region of the pixel electrode 131B that contacts the light-emitting layer 132.
[0036] The light emitting regions R, G1, G2, and B are defined by openings Ap_R, Ap_G1, Ap_G2, and Ap_B, respectively. The openings Ap_R, Ap_G1, Ap_G2, and Ap_B are formed by patterning a pixel isolation layer provided to cover the pixel electrodes 131R, 131G, and 131B, as described later. The green light-emitting region consists of two regions, G1 and G2, which are wider than the light-emitting region R or the light-emitting region B. This is because green is the most visible of red, green, and blue, and this is to ensure the lifespan of green.
[0037] In FIG. 6, the pixel electrode 131R has an integrated shape that combines an octagon and a rectangle in a plan view. Specifically, one side of the rectangular region of the pixel electrode 131R and one side of the octagonal region are approximately the same length, and the rectangle is located in the opposite direction to the E direction with respect to the octagon. In the octagonal region of the pixel electrode 131R, an octagonal opening Ap_R that is smaller than the octagon is provided, and a contact region Ct_Px_R is provided in the rectangular region. The contact region Ct_Px_R is a connection region with the lower wiring in the pixel electrode 131R, and the lower wiring is further electrically connected to the drain node of the transistor 121 in the pixel unit 110R via multiple elements.
[0038] The pixel electrode 131G has an integral shape in which two pixel electrodes 131R are connected in the E direction in a plan view. In such a pixel electrode 131G, of the two octagons, an octagonal region in the opposite direction to the E direction is provided with an octagonal opening Ap_G1 smaller than the octagon. In the pixel electrode 131G, of the two octagons, an octagonal region in the E direction is provided with an octagonal opening Ap_G2 smaller than the octagon. In the pixel electrode 131G, a contact region Ct_Px_G is provided in a rectangular region on the opposite side to the E direction from the opening Ap_G1, and a dummy contact region Ct_Dm is provided in a rectangular region between the openings Ap_G1 and Ap_Px_G2. The contact region Ct_Px_G is a connection region with the lower wiring in the pixel electrode 131G, and the lower wiring is further electrically connected to the drain node of the transistor 121 in the pixel unit 110G via multiple elements. The dummy contact region Ct_Dm is a region in the pixel electrode 131G that is not connected to the lower wiring.
[0039] The pixel electrode 131B has substantially the same shape as the pixel electrode 131R in a plan view. In the octagonal region of the pixel electrode 131B, an opening Ap_B having an octagonal shape smaller than the octagon is provided, and a contact region Ct_Px_B is provided in the rectangular region. The contact region Ct_Px_B is a connection region with the lower wiring in the pixel electrode 131B, and the lower wiring is further electrically connected to the drain node of the transistor 121 in the pixel unit 110B via multiple elements.
[0040] Fig. 7 is a plan view showing the arrangement of the colored layers, Fig. 8 is a plan view showing the shape of the colored layers, and Fig. 9 is a diagram for explaining the overlapping of the colored layers. 7 and 8, the green colored layer Cf_G is octagonal in plan view and is provided to cover the light-emitting regions G1 and G2 individually. The blue colored layer Cf_B is provided to cover the light-emitting region B and to correspond to the region between the light-emitting regions G1 and G2 adjacent to each other along the E and F directions. Similarly, the red colored layer Cf_R is provided to cover the light-emitting region R and to correspond to the region between the light-emitting regions G1 and G2 adjacent to each other along the E and F directions.
[0041] As shown in FIG. 8, the colored layer Cf_B includes, in a plan view, an octagonal area Ba covering the light-emitting area B, and rectangular areas Bb1, Bb2, Bb3, and Bb4 in the area between the light-emitting areas G1 and G2.
[0042] Of the four regions Bb1, Bb2, Bb3, and Bb4, region Bb1 is a rectangle in plan view that contacts the octagonal region Ba in the opposite direction to the F direction, and is provided between a colored layer Cf_G (corresponding to light-emitting region G2) that is adjacent to region Ba in the X direction, and a colored layer Cf_G (corresponding to light-emitting region G1) that is adjacent to region Ba in the Y direction. In a planar view, region Bb2 is a rectangle that contacts region Ba in the opposite direction to the E direction, and is provided between a colored layer Cf_G (corresponding to light-emitting region G1) that is adjacent to region Ba in the Y direction, and a colored layer Cf_G (corresponding to light-emitting region G2) that is adjacent to region Ba in the opposite direction to the X direction.
[0043] In a planar view, region Bb3 is a rectangle that is tangent to region Ba in the F direction, and is provided between a colored layer Cf_G (corresponding to light-emitting region G2) that is adjacent to region Ba in the opposite X direction, and a colored layer Cf_G (corresponding to light-emitting region G1) that is adjacent to region Ba in the opposite Y direction. In a planar view, region Bb4 is a rectangle that contacts region Ba in the E direction, and is provided between a colored layer Cf_G (corresponding to light-emitting region G1) that is adjacent to region Ba in the opposite Y direction, and a colored layer Cf_G (corresponding to light-emitting region G2) that is adjacent to region Ba in the X direction.
[0044] The colored layer Cf_R includes, in a plan view, an octagonal region Ra covering the light-emitting region R, and rectangular regions Rb1, Rb2, Rb3, and Rb4 in the region between the light-emitting regions G1 and G2.
[0045] Of the four regions Rb1, Rb2, Rb3, and Rb4, region Rb1 is a rectangle in plan view that contacts the octagonal region Ra in the opposite direction to the F direction, and is provided between a colored layer Cf_G (corresponding to light-emitting region G1) that is adjacent to region Ra in the X direction, and a colored layer Cf_G (corresponding to light-emitting region G2) that is adjacent to region Ra in the Y direction. In a planar view, region Rb2 is a rectangle that contacts region Ra in the opposite direction to the E direction, and is provided between a colored layer Cf_G (corresponding to light-emitting region G2) that is adjacent to region Ra in the Y direction, and a colored layer Cf_G (corresponding to light-emitting region G1) that is adjacent to region Ra in the opposite direction to the X direction.
[0046] Region Rb3, in a planar view, is a rectangle tangent to region Ra in the F direction, and is provided between a colored layer Cf_G (corresponding to light-emitting region G1) adjacent to region Ra in the opposite X direction, and a colored layer Cf_G (corresponding to light-emitting region G2) adjacent to region Ra in the opposite Y direction. Region Rb4, in a planar view, is a rectangle tangent to region Ra in the E direction, and is provided between a colored layer Cf_G (corresponding to light-emitting region G2) adjacent to region Ra in the opposite Y direction, and a colored layer Cf_G (corresponding to light-emitting region G1) adjacent to region Ra in the X direction.
[0047] The region Rb3 of the colored layer Cf_R is overlapped with the region Bb1 of the colored layer Cf_B which constitutes the same dot. The region Rb4 of the colored layer Cf_R is overlapped with the region Bb2 of the colored layer Cf_B that constitutes another dot. The other dot is a dot adjacent in the X direction in FIG. 3 to the dot corresponding to the region Ra of the colored layer Cf_R in FIG. 5. The region Rb1 of the colored layer Cf_R is overlapped with the region Bb3 of the colored layer Cf_B that constitutes another dot. The other dot is adjacent to the dot corresponding to the region Ra of the colored layer Cf_R in the opposite direction to the F direction in FIG. 3, that is, the dot located diagonally above and to the left in FIG. The region Rb2 of the colored layer Cf_R is overlapped with the region Bb4 of the colored layer Cf_B that constitutes another dot. The other dot is a dot adjacent in the Y direction in FIG. 3 to the dot corresponding to the region Ra of the colored layer Cf_R in FIG. 5.
[0048] Next, the cross-sectional structure of the main part of the electro-optical device 10 will be described.
[0049] FIG. 10 is a cross-sectional view of a main part of the pixel unit 110R in the electro-optical device 10, taken along the E direction in a region including the light-emitting region R and the contact region Ct_Px_R in FIG.
[0050] The contact electrode 61R is formed on the substrate 60 and is electrically connected to a circuit layer (not shown) through a contact hole (not shown). The circuit layer includes the scanning line 12, the data line 14, and the transistors 121 and 122. The reflective electrode 62R is laminated on the contact electrode 61R, and reflects light incident from the opposite direction to the Z direction in the Z direction. The reflective electrode 62R is, for example, a conductive layer in which an aluminum and copper alloy (AlCu) film is laminated on a titanium (Ti) film. The contact electrode 61R and the reflective electrode 62R are provided corresponding to the pixel unit 110R among the above-mentioned conductive layers patterned into islands in a planar view individually for each of the pixel units 110R, 110G, and 110B. It should be noted that the island-like patterning results in gaps 62Ct.
[0051] The enhanced reflection layer 63 is a layer for enhancing the reflective characteristics of the reflective electrode 62R. The enhanced reflection layer 63 has insulating properties and optical transparency, and is provided so as to cover the reflective electrode 62R. The enhanced reflection layer 63 is made of, for example, silicon oxide.
[0052] The first insulating layer 64 covers the reflection-enhancing layer 63 and is provided along the gap 62Ct. Therefore, the first insulating layer 64 has a recess 64a in the vicinity of the gap 62Ct. The buried insulating layer 66 is provided so as to fill the recess 64a. The second insulating layer 65 is laminated on the first insulating layer 64 and the buried insulating layer 66. The first insulating layer 64 and the second insulating layer 65 are made of, for example, silicon nitride (SiN), and the buried insulating layer 66 is made of, for example, silicon oxide. The protective layer 72 is an insulating film laminated on the second insulating layer 65, and is made of, for example, silicon oxide.
[0053] The reflective layer 63, the first insulating layer 64, the second insulating layer 65 and the protective layer 72 are each provided with an opening in the contact region Ct_Px_R. The relay electrode 71R is formed by patterning a conductive layer that is laminated along the opening and on the reflective electrode 62R and the protective layer 72. The relay electrode 71R has a recess that is aligned with the opening. The conductive layer that constitutes the relay electrode 71R is made of, for example, titanium nitride (TiN).
[0054] The first optical adjustment layer 67 and the second optical adjustment layer 68 are insulating layers for adjusting the optical distance in the optical resonator, and have optical transparency. For example, silicon oxide is used as the first optical adjustment layer 67 and the second optical adjustment layer 68. The first optical adjustment layer 67 and the second optical adjustment layer 68 are perforated in the region CtR of the contact region Ct_Px_R.
[0055] The pixel electrode 131R is formed by patterning a conductive layer having optical transparency. The pixel electrode 131R is laminated on the second optical adjustment layer 68 or the relay electrode 71R, and is laminated on the second insulating layer 65 in the region CtR where the first optical adjustment layer 67 and the second optical adjustment layer 68 are opened. The pixel electrode 131R is patterned in a shape shown in FIG. 6 when viewed from above. The pixel electrode 131R is laminated along the opening of the region CtR, so that it has a recess corresponding to the region CtR. The conductive layer constituting the pixel electrode 131R is, for example, ITO (Indium Tin Oxide).
[0056] The pixel separation layer 134 is an insulating film laminated on the second optical adjustment layer 68, the second insulating layer 65, or the pixel electrode 131R, and provided so as to cover the peripheral portion of the pixel electrode 131R. The pixel separation layer 134 has an opening Ap_R having a shape shown in Fig. 5 in a plan view in terms of the pixel portion 110R. The pixel separation layer 134 is made of, for example, silicon oxide.
[0057] The light-emitting layer 132 is laminated on the pixel electrode 131R or the pixel separation layer 134. Although not specifically shown, the light-emitting layer 132 includes a hole injection layer, an organic light-emitting layer, and an electron transport layer, and is common to all of the pixel units 110R, 110G, and 110B.
[0058] The common electrode 133 is a conductive layer having optical transparency and reflectivity. The common electrode 133 is provided so as to cover the light-emitting layer 132, and is common to all the pixel units in the pixel units 110R, 110G, and 110B. The common electrode 133 is made of, for example, an alloy of Mg and Ag.
[0059] The light-emitting layer 132 is a region of the pixel electrode 131R that is not covered by the pixel separation layer 134, that is, a region in contact with the pixel electrode 131R, and emits white light when holes are supplied from a region defined by the opening Ap_R. In the portion corresponding to the light-emitting region R in a planar view, an optical resonator is formed by the reflective electrode 62R and the common electrode 133 in a cross-sectional view, and the optical distance LR between the reflective electrode 62R and the common electrode 133 is adjusted by the film thicknesses of the first optical adjustment layer 67 and the second optical adjustment layer 68. Strictly speaking, the optical distance is the distance between the reflective electrode 62R and the common electrode 133 multiplied by the refractive index of the medium between the reflective electrode 62R and the common electrode 133, but here it is simply illustrated as the physical distance.
[0060] In the portion corresponding to the light-emitting region R, the white light emitted from the light-emitting layer 132 is repeatedly reflected between the reflective electrode 62R and the common electrode 133, and the intensity of the light with the wavelength corresponding to the optical distance LR is strengthened. In the present embodiment, as an example, the intensity of the light with a wavelength of 610 nm is strengthened in the pixel unit 110R. The strengthened light passes through the common electrode 133 and is emitted as red light in the Z direction or the like via the colored layer Cf_R. In this way, light including a red wavelength range is emitted from the light emitting region R in the Z direction or the like.
[0061] The first sealing layer 81 is an insulating layer having optical transparency, and is provided so as to cover the common electrode 133 . The planarization layer 82 is an insulating layer having optical transparency, and is provided to cover the first sealing layer 81 so as to eliminate steps and provide a flat observation surface. The planarization layer 82 is made of an organic material such as epoxy resin. The second sealing layer 83 is an insulating layer having optical transparency, and is provided so as to cover the planarization layer 82. The first sealing layer 81 and the second sealing layer 83 are provided to prevent moisture, oxygen, and the like from entering the light emitting layer 132. The first sealing layer 81 and the second sealing layer 83 are made of, for example, silicon oxynitride (SiON).
[0062] In the light-emitting region R of the pixel unit 110R, the colored layer Cf_R is provided in a shape shown in FIG. 7 and FIG. 8 in a plan view so as to cover the second sealing layer 83, and at a position as shown in FIG. 9. The colored layer Cf_R is provided by patterning a photosensitive resin containing a pigment that selectively transmits red light using a photolithography technique. As a result, the colored layer Cf_R has a function of transmitting red light. The red light refers to light that includes a red wavelength range. In this embodiment, the red wavelength range is 580 nm or more and 700 nm or less.
[0063] In the pixel unit 110R, the contact region Ct_Px_R is included in the regions Bb4 and Rb2 in plan view. Therefore, in the region including the contact region Ct_Px_R, the red colored layer Cf_R is provided overlapping the blue colored layer Cf_B. In addition, a protective glass or the like is provided via an adhesive to cover the colored layers Cf_R and Cf_B, but is not shown in the present example.
[0064] 11 is a cross-sectional view of a main part of the pixel unit 110G of the electro-optical device 10, taken along the E direction in FIG. 6, the region including the light-emitting region G2, the dummy contact region Ct_Dm, the light-emitting region G1, and the contact region Ct_Px_G.
[0065] First, the light-emitting regions G1 and G2 of the pixel unit 110G will be described. The light-emitting regions G1 and G2 differ from the light-emitting region R shown in FIG. 10 in that the first optical adjustment layer 67 is not provided in the light-emitting regions G1 and G2. In detail, in the portion corresponding to the light-emitting region R, a first optical adjustment layer 67 and a second optical adjustment layer 68 are provided between the reflective electrode 62R and the pixel electrode 131R, whereas in the portion corresponding to the light-emitting regions G1 and G2, a second optical adjustment layer 68 is provided between the reflective electrode 62G and the pixel electrode 131G, but the first optical adjustment layer 67 is not provided. Therefore, the optical distance LG between the reflective electrode 62G and the common electrode 133 in the portion corresponding to the light-emitting regions G1 and G2 is shorter than the optical distance LR in the portion corresponding to the light-emitting region R by the absence of the first optical adjustment layer 67.
[0066] Furthermore, the light-emitting regions G1 and G2 differ from the light-emitting region R in that the pixel electrode 131G is patterned in a shape shown in Fig. 6 when seen in a plan view. Note that the light-emitting regions G1 and G2 share with the light-emitting region R the fact that the pixel electrode 131G is laminated on the second optical adjustment layer 68.
[0067] The contact electrode 61R, the reflective electrode 62R, and the relay electrode 71R in the pixel section 110R are provided in this order as a contact electrode 61G, a reflective electrode 62G, and a relay electrode 71G in the pixel section 110G.
[0068] In the portions corresponding to the light-emitting regions G1 and G2, the white light emitted from the light-emitting layer 132 is repeatedly reflected between the reflective electrode 62G and the common electrode 133, and the intensity of the light with the wavelength corresponding to the optical distance LG is strengthened. In the present embodiment, as an example, the intensity of the light with a wavelength of 540 nm is strengthened in the pixel unit 110G. The strengthened light passes through the common electrode 133 and is emitted as green light in the Z direction or the like via the colored layer Cf_G. In this way, light including a green wavelength range is emitted in the Z direction or the like from the light emitting regions G1 and G2 in a plan view.
[0069] Next, the contact region Ct_Px_G of the pixel unit 110G will be described. In the contact region Ct_Px_G, the reflection-enhancing layer 63, the first insulating layer 64, the second insulating layer 65 and the protective layer 72 are opened, and the relay electrode 71G is provided along this opening and is laminated on the reflection electrode 62G and the protective layer 72. In the pixel unit 110G, the first optical adjustment layer 67 is not provided, so in the region CtG, only the second optical adjustment layer 68 is opened. By such a contact region Ct_Px_G, the pixel electrode 131G is electrically connected to a circuit layer (not shown) via the relay electrode 71G, the reflective electrode 62G, and the contact electrode 61G in this order.
[0070] In the dummy contact region Ct_Dm, a protective layer 72 and a dummy relay electrode 71D are provided in this order on the Z-direction surface of the second insulating layer 65. The dummy relay electrode 71D is formed by patterning the same layer as the relay electrodes 71R, 71G, and 71B. In the dummy contact region Ct_Dm, the first optical adjustment layer 67 is provided so as to cover the protective layer 72 and the dummy relay electrode 71D.
[0071] In addition, in the dummy contact region Ct_Dm, a first optical adjustment layer 67 and a second optical adjustment layer 68 are present between the pixel electrode 131G and the dummy relay electrode 71D, and a protective layer 72 and a second insulating layer 65, etc. are present between the dummy relay electrode 71D and the reflective electrode 62G. Therefore, the pixel electrode 131G and the dummy relay electrode 71D are not electrically connected, and the dummy relay electrode 71D and the reflective electrode 62G are also not electrically connected. In this embodiment, in the dummy contact region Ct_Dm, the pixel electrode 131G is not electrically connected to the reflective electrode 62G (the drain node of the transistor 121). Therefore, in the dummy contact region Ct_Dm, the pixel electrode 131G does not contribute to the electrical connection with the reflective electrode 62G. In that sense, it is called a dummy contact region.
[0072] In the light-emitting regions G1 and G2 of the pixel unit 110G, the colored layer Cf_G is provided in a shape shown in FIG. 7 and FIG. 8 in a plan view so as to cover the second sealing layer 83, and at a position as shown in FIG. 9. The colored layer Cf_G is provided by patterning a photosensitive resin containing a pigment that selectively transmits green light using a photolithography technique. As a result, the colored layer Cf_G has a function of transmitting green light. The green light refers to light that includes a green wavelength range. In this embodiment, the green wavelength range is 500 nm or more and 580 nm or less.
[0073] In the pixel unit 110G, the contact region Ct_Px_G is included in the regions Bb3 and Rb1 in plan view. Therefore, in the region including the contact region Ct_Px_G, a red colored layer Cf_R is provided overlapping the blue colored layer Cf_B. In the pixel section 110G, the dummy contact region Ct_Dm is included in the regions Bb1 and Rb3 in plan view. Therefore, in the dummy contact region Ct_Dm, the red colored layer Cf_R is provided overlapping the blue colored layer Cf_B.
[0074] FIG. 12 is a cross-sectional view of a main part of the pixel unit 110B of the electro-optical device 10, taken along the E direction in a region including the light-emitting region B and the contact region Ct_Px_B in FIG.
[0075] First, the light-emitting region B of the pixel unit 110G will be described. The light-emitting region B differs from the light-emitting region G1 or G2 shown in FIG. 11 in that the second optical adjustment layer 68 is not provided in the light-emitting region B. Therefore, the optical distance LB between the reflective electrode 62B and the common electrode 133 in the portion corresponding to the light-emitting region B is shorter than the optical distance LG in the portion corresponding to the light-emitting region G1 or G2 by the absence of the second optical adjustment layer 68. Therefore, the optical lengths LR, LG, and LB in the optical resonator are LR>LG>LB This becomes a relationship.
[0076] In the pixel unit 110B, the pixel electrode 131B is patterned in a shape shown in Fig. 6 when seen in a plan view. Note that the pixel electrode 131B is laminated on the second optical adjustment layer 68 in the light-emitting region B, which is common to the light-emitting regions R, G1, and G2.
[0077] The contact electrode 61R, the reflective electrode 62R, and the relay electrode 71R in the pixel section 110R are provided as a contact electrode 61B, a reflective electrode 62B, and a relay electrode 71B, in that order, in the pixel section 110B.
[0078] In the contact region Ct_Px_B, the reflective layer 63, the first insulating layer 64, the second insulating layer 65 and the protective layer 72 are opened, and the relay electrode 71B is provided along this opening and laminated on the reflective electrode 62B and the protective layer 72. In the pixel section 110B, the first optical adjustment layer 67 and the second optical adjustment layer 68 are not provided, and therefore no recesses like those in the regions CtR and Ct_G are provided. By such a contact region Ct_Px_B, the pixel electrode 131B is electrically connected to a circuit layer (not shown) via the relay electrode 71B, the reflective electrode 62B, and the contact electrode 61B in this order.
[0079] In the light-emitting region B of the pixel unit 110B, a colored layer Cf_B is provided so as to cover the second sealing layer 83. The colored layer Cf_B is provided by patterning a photosensitive resin containing a pigment that transmits blue light using a photolithography technique. As a result, the colored layer Cf_B has a function of transmitting blue light. The blue light refers to light that includes a blue wavelength range. In this embodiment, the blue wavelength range is 400 nm or more and 500 nm or less.
[0080] In the pixel section 110B, the contact region Ct_Px_B is included in regions Bb2 and Rb4 in plan view. Therefore, in the region including the contact region Ct_Px_B, a red colored layer Cf_R is provided overlapping the blue colored layer Cf_B.
[0081] In the portion corresponding to the light-emitting region B, the white light emitted from the light-emitting layer 132 is repeatedly reflected between the reflective electrode 62B and the common electrode 133, and the intensity of the light with the wavelength corresponding to the optical distance LB is strengthened. In the present embodiment, as an example, the intensity of the light with a wavelength of 470 nm is strengthened in the pixel unit 110B. The strengthened light passes through the common electrode 133 and is emitted as blue light in the Z direction or the like via the colored layer Cf_B. In this way, light including a blue wavelength range is emitted in the Z direction or the like from light emitting region B in a plan view.
[0082] FIG. 13 is a cross-sectional view of a main part of the electro-optical device 10, taken along the F direction in a region including the light-emitting region R, the dummy contact region Ct_Dm, the light-emitting region B, and the contact region Ct_Px_G in FIG.
[0083] The light emitting region R, the dummy contact region Ct_Dm, the light emitting region B, and the contact region Ct_Px_G have been described above. In addition, in the regions Bb3 and Rb1 in which the contact region Ct_Px_G is provided, and in the regions Bb1 and Rb3 in which the dummy contact region Ct_Dm is provided, the red colored layer Cf_R is provided overlapping the colored layer Cf_B, as has been described above.
[0084] In the contact regions Ct_Px_R, Ct_Px_G1, and Ct_Px_B, a reflection-enhancing layer 63, a first insulating layer 64, a second insulating layer 65, a protective layer 72, and a relay electrode 71 (71R, 71G) are provided in this order from the reflective electrode 62 (62R, 62G, 62B) to the pixel electrode 131. Therefore, in the contact regions Ct_Px_R, Ct_Px_G1, and Ct_Px_B, the distance Lpx from the reflective electrode 62 to the pixel electrode 131 is uniform in the pixel units 110R, 110G, and 110B.
[0085] In contrast, in the dummy contact region Ct_Dm, a reflection-enhancing layer 63, a first insulating layer 64, a second insulating layer 65, a protective layer 72, a dummy relay electrode 71D, a first optical adjustment layer 67 and a second optical adjustment layer 68 are provided, in that order, from the reflective electrode 62G to the pixel electrode 131G. In other words, the first optical adjustment layer 67 and the second optical adjustment layer 68 are not provided in the contact regions Ct_Px_R, Ct_Px_G, and Ct_Px_B, as compared with the dummy contact region Ct_Dm. Therefore, in the dummy contact region Ct_Dm, the distance LDm from the reflective electrode 62G to the pixel electrode 131G is longer than the distance Lpx in the contact regions Ct_Px_R, Ct_Px_G1, and Ct_Px_B. That is, in the pixel units 110R, 110G, and 110B, when the reflective electrode 62 is used as a reference, the dummy contact region Ct_Dm is the longest (thickest) distance in the Z direction to the pixel electrode 131.
[0086] The first sealing layer 81 is provided so as to cover the common electrode 133. The planarization layer 82 provided so as to cover the first sealing layer 81 is formed, for example, by screen printing. Screen printing is printing using a "screen mesh" made by folding synthetic fibers or metal fibers, and an organic material such as epoxy resin is passed through the mesh of the screen mesh by moving a squeegee, and printed so as to cover the first sealing layer 81. In screen printing, the intersections of the mesh press the first sealing layer 81 as the squeegee moves. When pressing, the force is not evenly applied in the display area 100, and some areas may be compressed more than other areas. In addition, the manufacturing process of the electro-optical device 10 is not limited to screen printing, and there are quite a few cases in which some areas are compressed by applying some force to the display area 100.
[0087] In the compressed area, the light-emitting layer 132 becomes locally thin. In the locally thinned portion of the light-emitting layer 132, the resistance value is low, and a small current flows easily. When a small current flows, the light tends to be emitted in red, which is highly efficient. This red light is in a wavelength range that resonates with the optical resonator at the optical length LR, which has the highest light-emitting efficiency. This phenomenon can be prevented by making the planarization layer 82 thicker; however, this increases the distance from the light-emitting layer 132 to the colored layers Cf_R, Cf_G, and Cf_B, which results in a narrower viewing angle.
[0088] In this embodiment, when a part of the display region 100 is pressed, the pressure is suppressed by the dummy contact region Ct_Dm acting as a stopper, so that the light-emitting layer 132 in the light-emitting regions R, G1, G2, and B is prevented from becoming locally thin. Moreover, the light-emitting layer 132 becomes thinner due to pressure around the dummy contact region Ct_Dm. The light-emitting layer 132 tends to emit red light in the locally thinned portion. The dummy contact region Ct_Dm is included in the colored layer Cf_B in plan view. Therefore, even if the light-emitting layer 132 emits red light due to the thinning near the dummy contact region Ct_Dm, the red light is not visible to the observer because it is blocked by the colored layer Cf_B. Therefore, according to this embodiment, it is possible to suppress degradation of display quality caused by localized pressure on the display area 100.
[0089] In this embodiment, the light-emitting regions R and B are repeatedly arranged in both the E direction and the F direction, and similarly, the light-emitting regions G1 and G2 are repeatedly arranged in both the E direction and the F direction. In such an arrangement of the light-emitting regions R, G1, G2, and B, the following problem occurs in the configuration of the first reference example in which the colored layers Cf_R, Cf_G, and Cf_B are provided corresponding to the regions partitioned by the boundary line as shown in FIG.
[0090] In the configuration of the first reference example, the colored layers Cf_G are arranged continuously along the E direction. Therefore, for example, of the light emitted from the light-emitting region G1 in the OLED 130G, not only the component in the Z direction but also a significant portion of the component along the E direction (oblique light) passes through the colored layers Cf_G. Since the colored layer Cf_G is continuous not only in the E direction but also in the F direction, a significant amount of oblique light along the F direction out of the light emitted from the light emitting region G1 passes through the colored layer Cf_G. Regarding the light emitted from the light emitting region G2, a considerable amount of oblique light along the E direction and the F direction is transmitted through the colored layer Cf_G.
[0091] In the first reference example, the colored layers Cf_R and Cf_B are arranged alternately along the E, F directions, i.e., are not continuously arranged along the E, F directions, so that oblique light emitted from either OLED 130R or 130G is blocked by the colored layer corresponding to the other. For this reason, in the first reference example, the oblique light is easily visible in the light emitted from the OLED 130G, whereas the oblique light is difficult to see in the light emitted from the OLEDs 130R and 130B. Therefore, in the first reference example, when viewed with oblique light along the E and F directions, the degree of color change due to the viewing angle with respect to the oblique direction differs between green, red, and blue.
[0092] In the technology described in Patent Document 1, of the four octagonal regions arranged in two rows and two columns to express the color of one dot, a red light emitting region is assigned to one, a green light emitting region to one, and blue light emitting regions to the remaining two, which is different from the present embodiment in which the two green light emitting regions G1 and G2 are assigned diagonally. Therefore, in the technology described in Patent Document 1, a configuration in which the two green light emitting regions G1 and G2 are assigned diagonally is assumed as the first reference example shown in FIG.
[0093] Next, a second reference example will be described, which solves the problem in the first reference example that the degree of color change due to the viewing angle in the oblique direction is different between green, red, and blue. In the second reference example, a colored layer of a color different from that of the light-emitting regions G1 and G2 in a plan view is provided in the regions Bb1, Bb2, Bb3, and Bb4 between the light-emitting regions G1 and G2 in a plan view, for example, a colored layer Cf_B as shown in FIG. 25. Therefore, in the region Bb1 in a cross-sectional view, as shown in FIG. 26, oblique light along the E direction among the light emitted from the OLED 130G is blocked by the colored layer Cf_B. Here, the region Bb1 has been described, but the same is true for the regions Bb2, Bb3, and Bb4. That is, the regions Bb1, Bb2, Bb3, and Bb4 of the colored layer Cf_B block the green light emitted from the light-emitting region G1 or G2. The colored layer Cf_G transmits the green light emitted in the Z direction from the light-emitting region G1 or G2. Therefore, in this embodiment, similar to red and blue oblique light, green oblique light is also difficult to see, so the degree of color change due to the viewing angle in the oblique direction becomes similar for red, green and blue.
[0094] 26, reference numeral 80 denotes a layer collectively representing the first sealing layer 81, the planarizing layer 82, and the second sealing layer 83. Reference numeral 90 denotes an adhesive layer for adhering a protective glass (not shown).
[0095] However, in the second reference example, a problem occurred in that in the light-emitting region R and light-emitting region B adjacent to each other in the E or F direction, depending on the conditions of the colored layer, the red and blue components appeared differently in oblique light along the E or F direction.
[0096] 27 is a cross-sectional view for explaining the problem of the second reference example. In the example shown in the figure, the red colored layer Cf_R is provided so as to cover the light-emitting region R in a planar view, and therefore the end of the colored layer Cf_R exceeds the opening Ap_R which is the outer edge of the pixel separation layer 134 in a planar view. In the colored layer Cf_R thus provided, the corners are blunted due to heat treatment or the like after patterning, resulting in a convex shape in a cross-sectional view.
[0097] A protective glass is provided on the colored layers Cf_R and Cf_B via an adhesive 80, but due to the difference in refractive index between the colored layer Cf_R and the adhesive 80, an unintended lens light-collecting effect occurs in the convex-shaped colored layer Cf_R. For this reason, as shown by the dashed line, the oblique red light passing near the opening end of the opening Ap_R is refracted by the light-condensing effect of the convex lens in the colored layer Cf_R. This refraction makes the straight light shown by the dashed line invisible, deteriorating the viewing angle characteristics of red.
[0098] The end of the colored layer Cf_B also has a convex shape in cross section, but since the end of the blue colored layer Cf_B is far from the opening end of the opening Ap_B, the blue oblique light does not pass through the convex part and travels almost straight. Therefore, the viewing angle characteristics of blue light are not deteriorated compared to the viewing angle characteristics of red light. Therefore, in the second reference example, there was a problem that the viewing angle characteristics of red light may be deteriorated more than the viewing angle characteristics of blue light. In general, the refractive index tends to increase as the wavelength of light passing through a medium increases. Therefore, the refractive indices of the colored layers Cf_R, Cf_G, and Cf_B are highest in this order. The refractive index of the colored layer Cf_R for light in the third wavelength range may be higher than the refractive index of the colored layer Cf_R for light in the first wavelength range.
[0099] In contrast, in this embodiment, a red colored layer Cf_R is provided overlapping a blue colored layer Cf_B between light-emitting regions R and B adjacent to each other in the E or F direction. In detail, in a cross-sectional view, as shown in Fig. 14, the red colored layer Cf_R covers the blue colored layer Cf_B, so that an end of the red colored layer Cf_R reaches the vicinity of the blue opening Ap_B, and the end of the colored layer Cf_R is unlikely to have a convex shape. Therefore, in this embodiment, oblique red light that passes near the opening end of the opening Ap_R travels almost straight without being refracted due to the lens focusing effect of the colored layer Cf_R, thereby reducing the deterioration of the viewing angle characteristics of red.
[0100] 15 is an explanatory diagram showing measurement of color change in the electro-optical device 10 according to this embodiment. The color change is measured by using a colorimeter 200 to measure the chromaticity when the diagonal center Cen of the display area 100 is viewed from the front and when the chromaticity is shifted, for example, by 20 degrees from the diagonal center, and the chromaticity of both are plotted in a u'v' coordinate system, and is expressed as the distance (Δu'v') in the plotted color space. The distance (Δu'v') in the color space is also called the color difference, and it is said that if the color difference is greater than 0.02, it can be perceived by humans.
[0101] In this description, when the diagonal center Cen is viewed from the front, this refers to the case where the diagonal center Cen of the display area 100 is viewed from a point on a vertical line P that passes through the diagonal center Cen of the display area 100 and is a distance Q away from the diagonal center Cen. Furthermore, when the diagonal center Cen is shifted by 20 degrees, there are the following three cases. That is, first, in a plane defined by the Y direction and the Z direction, when the diagonal center Cen of the display area 100 is viewed from a point a distance Q away from the diagonal center Cen on a line inclined 20 degrees from the vertical line P to the diagonal center Cen (YZ: vertical direction), Secondly, in a plane defined by the X and Z directions, when the diagonal center Cen of the display area 100 is viewed from a point a distance Q away from the diagonal center Cen on a line inclined 20 degrees from the vertical line P to the diagonal center Cen (XZ: horizontal direction), Thirdly, in a plane defined by the E and Z directions, when the diagonal center Cen of the display area 100 is viewed from a point a distance Q away from the diagonal center Cen on a line inclined 20 degrees from the vertical line P to the diagonal center Cen (EZ: diagonal direction), There is.
[0102] 16 is a chart showing the results of measuring the color difference between the first reference example and the present embodiment and the second reference example in the vertical, horizontal and diagonal directions. Note that the second reference example in this case is an example in which the light collecting effect of the lens does not occur. As shown in the chart, in the first reference example, the color difference is smaller than 0.02 in the vertical and horizontal directions, but larger than 0.02 in the diagonal directions. In contrast, in the present embodiment and the second reference example, the color difference is smaller than 0.02 in all the vertical, horizontal and diagonal directions. For this reason, in this embodiment and the second reference example, even if the angle at which the display region 100 is observed changes, there is less color change compared to the first reference example.
[0103] As described above, the optical lengths LR, LG, and LB in the optical resonator are LR>LG>LB This is in a relationship.
[0104] In this embodiment, the first reference example, and the second reference example, the thickness of the reflective electrodes 62R, 62G, and 62B is 150 nm, and the thickness of the pixel electrode 131 is 20 nm. In the pixel section 110R, the design value of the total thickness of the reflection-enhancing layer 63, the first insulating layer 64, the second insulating layer 65, the first optical adjustment layer 67, and the second optical adjustment layer 68 is about 175 nm. In the pixel section 110G, the design value of the total thickness of the reflection-enhancing layer 63, the first insulating layer 64, the second insulating layer 65, and the second optical adjustment layer 68 is about 120 nm. In the pixel section 110B, the design value of the total thickness of the reflection-enhancing layer 63, the first insulating layer 64, and the second insulating layer 65 is about 70 nm.
[0105] Furthermore, when viewed in the X and Y directions, if light-emitting region B with the smallest optical distance and light-emitting region R with the largest optical distance are adjacent to each other, a large step will occur at the boundary between light-emitting regions B and R. If there is a large step at the boundary of the light-emitting region, the step will locally thin the light-emitting layer 132, lowering its resistance and making it more susceptible to current leakage. If a leakage current flows through the light-emitting layer 132, unintended light emission will occur and the color gamut of the displayed image will be narrowed. In particular, in a microdisplay panel such as that of this embodiment, the light-emitting area (opening) is small, so the effect of the step is significant. Note that light emission due to leakage current tends to occur in red, which is highly efficient, that is, light that is emitted even with a small current.
[0106] In contrast, according to this embodiment, in the Y direction, the light emitting regions G1 and B are adjacent to each other, and the light emitting regions R and G2 are adjacent to each other. In the X direction, the light emitting regions R and G1 are adjacent to each other, and the light emitting regions G2 and B are adjacent to each other. That is, in this embodiment, when viewed in the X and Y directions, the light emitting region B with the smallest optical distance and the light emitting region R with the largest optical distance are not adjacent to each other. Also, in this embodiment, when viewed in the E and F directions, the light emitting regions B and R are adjacent to each other via the contact region Ct_Px_G or the dummy contact region Ct_Dm. Therefore, according to this embodiment, the light-emitting layer 132 is prevented from becoming locally thin due to steps in the light-emitting region, so that abnormal light emission caused by leakage current is suppressed, and the color gamut of the displayed image is prevented from becoming narrow.
[0107] <Modification> The above-described embodiment may be modified in various ways. Specific modified aspects that may be applied to the embodiment are illustrated below. Two or more aspects selected from the following examples may be combined to the extent that they are not mutually contradictory.
[0108] The positional relationship between the light emitting regions and the contact regions in the pixel units 110R, 110G, and 110B is not limited to the positional relationship shown in FIG. 6, and may be the positional relationship of the following first, second, and third modified examples.
[0109] FIG. 17 is a plan view showing the arrangement of pixel electrodes 131R, 131G, 131B, etc. according to the first modified example. The first modified example is an example in which the contact regions are located in the direction F with respect to the light emitting region. In detail, the first modified example is an example in which the contact region Ct_Px_R is located in the direction F with respect to the light emitting region R, the contact region Ct_Px_B is located in the direction F with respect to the light emitting region G1, the dummy contact region Ct_Dm is located in the direction F with respect to the light emitting region G2, and the contact region Ct_Px_B is located in the direction F with respect to the light emitting region B. In the first modified example, the arrangement of the colored layers Cf_R, Cf_G, and Cf_B is the same as in the embodiment shown in Fig. 7. Therefore, in the first modified example, the region Bb1 overlaps with the contact region Ct_Px_R in a planar view, and the region Bb2 overlaps with the contact region Ct_Px_G in a planar view.
[0110] FIG. 18 is a plan view showing the arrangement of pixel electrodes 131R, 131G, 131B, etc. according to the second modified example. The second modified example is an example in which the contact regions are located in the opposite direction to the light emitting region in the direction F. In detail, the second modified example is an example in which the contact region Ct_Px_R is located in the opposite direction to the direction F to the light emitting region R, the contact region Ct_Px_B is located in the opposite direction to the direction F to the light emitting region G1 in the direction E, the dummy contact region Ct_Dm is located in the opposite direction to the direction F to the light emitting region G2, and the contact region Ct_Px_B is located in the opposite direction to the direction F to the light emitting region B. In the second modified example, the arrangement of the colored layers Cf_R, Cf_G, and Cf_B is the same as that in the embodiment shown in Fig. 7. Therefore, in the second modified example, the region Bb1 overlaps with the contact region Ct_Px_B in a planar view, and the region Bb2 overlaps with the dummy contact region Ct_Dm in a planar view.
[0111] Although not particularly shown, an example in which the contact region is located in the E direction with respect to the light emitting region may be used. However, when the contact region is located in the E direction with respect to the light emitting region, the region Bb1 overlaps with the dummy contact region Ct_Dm in plan view as in the embodiment, and the region Bb2 overlaps with the contact region Ct_Px_R in plan view.
[0112] 19 is a plan view showing an arrangement of pixel electrodes 131R, 131G, 131B, etc. according to a third modified example. In the third modified example, the contact region Ct_Px_G and the dummy contact region Ct_Dm in the pixel unit 110G are interchanged with those in the embodiment. In the third modified example, the arrangement of the colored layers Cf_R, Cf_G, and Cf_B is the same as in the embodiment shown in Fig. 7. Therefore, in the third modified example, the region Bb1 overlaps with the contact region Ct_Px_G in a planar view, and the region Bb2 overlaps with the contact region Ct_Px_B in a planar view.
[0113] In the embodiment, the colored layers Cf_R, Cf_G, and Cf_B have the shape shown in Fig. 8 in plan view, but are not limited to this shape. For example, a fourth modified example is an example in which the colored layers Cf_R, Cf_G, and Cf_B have the shape shown in Fig. 20 in plan view. As shown in this figure, in the fourth modified example, the colored layer Cf_G is not an octagon in plan view, but a rectangle with rounded corners. In detail, the colored layer Cf_G is smaller than the rectangle defined by the boundary line Edg of the pixel units 110R, 110G, and 110B by the amount of the rounded corners. Conversely, parts of the four corners of the colored layer Cf_R may extend beyond the quadrangle defined by the boundary lines Edg. Similarly, parts of the four corners of the colored layer Cf_B may extend beyond the quadrangle defined by the boundary lines Edg.
[0114] In other words, in the embodiment shown in Figure 8, all of the four corners of the colored layers Cf_R and Cf_B extend beyond the rectangle defined by the boundary line Edg, whereas in the fourth modified example shown in Figure 20, only some of the four corners of the colored layers Cf_R and Cf_B extend beyond the rectangle defined by the boundary line Edg.
[0115] The areas of the light-emitting regions R, G1, G2, and B in plan view do not need to be equal to each other. As described above, the area of each light-emitting region has properties that are determined in consideration of the light-emitting efficiency, visibility, life of the light-emitting layer, and the like.
[0116] FIG. 21 is a plan view showing a fifth modified example in which the areas of the light emitting regions R, G1, G2 and B are made different from one another. In the fifth modified example, Area of light-emitting area R < Area of light-emitting area B < Sum of the areas of light-emitting areas G1 and G2 It is. The reason for setting the areas of each light-emitting region in this manner is that red has the highest light-emitting efficiency among red, green, and blue, so the area can be the smallest, while green has high visibility and is given the largest area to ensure a long lifespan that can withstand heavy use.
[0117] In the fifth modified example, although not shown, a red colored layer Cf_R is provided overlapping a blue colored layer Cf_B between the light emitting regions G1 and G2 arranged along the E direction and the F direction.
[0118] In the embodiment, an OLED is given as an example of a light-emitting element, but the light-emitting element is not limited to this, and may be an inorganic EL element using an inorganic material, or a μLED element.
[0119] <Electronic equipment> Next, an electronic device to which the electro-optical device 10 according to any one of the embodiments or the first to fifth modified examples is applied will be described. The electro-optical device 10 is suitable for applications requiring small-sized pixels and high-definition display. Therefore, a head-mounted display will be taken as an example of the electronic device.
[0120] FIG. 22 is a diagram showing the appearance of a head mounted display, and FIG. 23 is a diagram showing its optical configuration. First, as shown in Fig. 22, the head mounted display 300 has temples 310, a bridge 320, and lenses 301L and 301R in appearance similar to general eyeglasses. Also, as shown in Fig. 23, the head mounted display 300 has an electro-optical device 10L for the left eye and an electro-optical device 10R for the right eye provided near the bridge 320 and on the rear side of the lenses 301L and 301R (the lower side in the figure). The image display surface of the electro-optical device 10L is disposed to the left in FIG. 23. As a result, the image displayed by the electro-optical device 10L is output in the 9 o'clock direction in the figure via the optical lens 302L. The half mirror 303L reflects the image displayed by the electro-optical device 10L in the 6 o'clock direction, while transmitting light incident from the 12 o'clock direction. The image display surface of the electro-optical device 10R is disposed to the right, opposite the electro-optical device 10L. As a result, the image displayed by the electro-optical device 10R is output in the 3 o'clock direction in the figure via the optical lens 302R. The half mirror 303R reflects the image displayed by the electro-optical device 10R in the 6 o'clock direction, while transmitting light incident from the 12 o'clock direction.
[0121] In this configuration, a person wearing the head mounted display 300 can observe images displayed by the electro-optical devices 10L and 10R in a see-through state in which the images are superimposed on the outside world. Furthermore, in this head mounted display 300, when the electro-optical device 10L displays an image for the left eye and the electro-optical device 10R displays an image for the right eye among the binocular images with parallax, the wearer can perceive the displayed image as if it had depth and a three-dimensional effect.
[0122] In addition, electronic devices including the electro-optical device 10 can be applied to electronic viewfinders in video cameras and interchangeable lens digital cameras, portable information terminals, display units of wristwatches, light bulbs of projection projectors, and the like, in addition to the head mounted display 300.
[0123] From the above description, for example, preferred aspects of the present disclosure can be understood as follows. In addition, in order to facilitate understanding of each aspect, reference numerals in the drawings are written in parentheses for convenience, but the present invention is not limited to the illustrated aspects.
[0124] An electro-optical device (10) according to one embodiment (embodiment 1) includes a first light-emitting region (B) that emits light in a first wavelength range in a planar view, a first colored layer (Cf_B) that transmits light in the first wavelength range, a second light-emitting region (G1) arranged adjacent to the first light-emitting region (B) in a first direction and that emits light in a second wavelength range, a second colored layer (Cf_G) arranged so as to overlap with the second light-emitting region and that transmits light in the second wavelength range, a third light-emitting region (R) arranged adjacent to the second light-emitting region (G1) in the second direction and that emits light in a third wavelength range, a third colored layer (Cf_R) arranged so as to overlap with the third light-emitting region and that transmits light in the third wavelength range, and a third colored layer (Cf_R) arranged adjacent to the second light-emitting region (G1) in a third direction intersecting the first direction and the second direction. the fourth light-emitting region (G2) is disposed on the first light-emitting region (B) and emits light in the second wavelength range, and a fourth colored layer (Cf_G) is disposed to overlap the fourth light-emitting region (G2) and transmits light in the second wavelength range, the first colored layer (Cf_B) includes a first region (Ba) overlapping with the first light-emitting region (B) in a planar view, and a second region (Bb1) located between the second light-emitting region (G1) and the fourth light-emitting region (G2) in a planar view, and the third colored layer (Cf_R) includes a third region (Ra) overlapping with the third light-emitting region (R) in a planar view, and a fourth region (Rb3) located between the second light-emitting region (G1) and the fourth light-emitting region (G2) in a planar view, and the second region (Bb1) and the fourth region (Rb3) at least partially overlap with each other in a planar view.
[0125] In the first aspect, between the second light-emitting region (G1) or the fourth light-emitting region (G2) adjacent to each other in the third direction, the third colored layer (Cf_R) is overlaid on the first colored layer (Cf_B) that transmits light in a wavelength range different from that of the second light-emitting region (G1) or the fourth light-emitting region (G2). The end of the third colored layer (Cf_R) is separated from the end of the third light-emitting region (R), so that the occurrence of a lens-like light-collecting effect caused by the end of the third colored layer (Cf_R) being blunted is suppressed. This makes it possible to improve the viewing angle characteristics of light in the third wavelength range.
[0126] The Y direction is an example of the first direction, the X direction is an example of the second direction, and the E direction is an example of the third direction. Light-emitting region B is an example of the first light-emitting region, light-emitting region G1 is an example of the second light-emitting region, light-emitting region R is an example of the third light-emitting region, and light-emitting region G2 is an example of the fourth light-emitting region. The colored layer Cf_B is an example of a first colored layer, the colored layer Cf_G is an example of a second colored layer and a fourth colored layer, and the colored layer Cf_R is an example of a third colored layer. Region Ba is an example of a first region, region Bb1 is an example of a second region, region Ra is an example of a third region, and region Rb3 is an example of a fourth region.
[0127] In the electro-optical device (10) according to a specific embodiment (embodiment 2) of embodiment 1, the refractive index of the third colored layer (Cf_R) is higher than the refractive index of the first colored layer (Cf_B). If the refractive index is high, the lens has a large focusing effect, which tends to deteriorate the viewing angle characteristics. However, according to aspect 2, the lens has a reduced focusing effect, and therefore the viewing angle characteristics of light in the third wavelength range can be effectively improved. In addition, in an electro-optical device (10) relating to a specific aspect (aspect 3) of aspect 1, the refractive index of the third colored layer (Cf_R) for light in the third wavelength range is higher than the refractive index of the first colored layer (Cf_B) for light in the first wavelength range. If the refractive index is high, the lens has a large focusing effect, which tends to deteriorate the viewing angle characteristics. However, according to aspect 2, the lens has a reduced focusing effect, and therefore the viewing angle characteristics of light in the third wavelength range can be effectively improved.
[0128] In the electro-optical device (10) according to a specific embodiment (embodiment 4) of embodiment 1, the first wavelength range is shorter than the second wavelength range and the third wavelength range. According to the fourth embodiment, the light in the second wavelength range emitted from the second light-emitting region (G1) or the fourth light-emitting region (G2) along the third direction can be blocked by the first colored layer (Cf_B) having a shorter wavelength.
[0129] In the electro-optical device (10) according to a specific embodiment (embodiment 5) of embodiment 1, the third colored layer (Cf_R) is provided on the front surface side of the first colored layer (Cf_B). Since the oblique light from the third light-emitting region (R) passes through the third colored layer (Cf_R) provided on the front surface side of the first colored layer (Cf_B), the viewing angle characteristics of the light in the third wavelength range can be improved. Note that the front side means the side from which the light from the light-emitting region is emitted.
[0130] The electro-optical device (10) according to a specific aspect (aspect 6) of aspect 1 includes a first light-emitting element (130B) including a common electrode (133), a first pixel electrode (131B), and a light-emitting layer (132), a first relay electrode (71B) electrically connected to the first pixel electrode (131B), a second light-emitting element (130G) including a common electrode (132), a second pixel electrode (131G), and a light-emitting layer (132), a second relay electrode (71G) electrically connected to the second pixel electrode (131G), a third light-emitting element (130R) including a common electrode (133), a third pixel electrode (131R), and a light-emitting layer (132), and a third relay electrode (71B) electrically connected to the third pixel electrode (131R). The first light-emitting element (130B) emits light in a first wavelength range from the first light-emitting region (B), the second light-emitting element (130G) emits light in a second wavelength range from the second light-emitting region (G1) and the fourth light-emitting region (G2), the third light-emitting element (130R) emits light in a third wavelength range from the third light-emitting region (R), the first light-emitting region (B) is a region where the first pixel electrode (131B) and the light-emitting layer (132) are in contact, the second light-emitting region (G1) and the fourth light-emitting region (G2) are respectively regions where the second pixel electrode (131G) and the light-emitting layer (132) are in contact, and the third light-emitting region (R) is a region where the third pixel electrode (131R) and the light-emitting layer (132) are in contact. The pixel electrode 131B is an example of a first pixel electrode, the pixel electrode 131G is an example of a second pixel electrode, and the pixel electrode 131R is an example of a third pixel electrode. The relay electrode 71B is an example of a first relay electrode, the relay electrode 71G is an example of a second relay electrode, and the relay electrode 71R is an example of a third relay electrode.
[0131] In an electro-optical device (10) relating to a specific aspect (aspect 7) of aspect 6, the second region (Bb1) overlaps, in a planar view, either the first contact region (Ct_Px_B) where the first pixel electrode (131B) and the first relay electrode (71B) are connected, the second contact region (Ct_Px_G) where the second pixel electrode (131G) and the second relay electrode (71G) are connected, or the third contact region (Ct_Px_R) where the third pixel electrode (131R) and the third relay electrode (71R) are connected. The contact region Ct_Px_B is an example of a first contact region, the contact region Ct_Px_G is an example of a second contact region, and the contact region Ct_Px_R is an example of a third contact region.
[0132] In an electro-optical device (10) according to a specific aspect (aspect 8) of aspect 6, the first relay electrode (71B) is electrically connected to the first reflective electrode (62B) and is provided between the first reflective electrode (62B) and the first pixel electrode (131B) in a cross-sectional view, the second relay electrode (71G) is electrically connected to the second reflective electrode (62G) and is provided between the second reflective electrode (62G) and the second pixel electrode (131G) in a cross-sectional view, and the third relay electrode (71R) is electrically connected to the third reflective electrode (62R) and is provided between the third reflective electrode (62R) and the third pixel electrode (131B) in a cross-sectional view. a first distance (LB) from the first reflective electrode (62B) to the common electrode (133) in a cross-sectional view in the first light-emitting region (B) is a distance corresponding to the first wavelength range, a second distance (LG) from the second reflective electrode (62G) to the common electrode (133) in a cross-sectional view in the second light-emitting region (G) is a distance corresponding to the first wavelength range, and a third distance (LR) from the third reflective electrode (62R) to the common electrode (133) in a cross-sectional view in the third light-emitting region is a distance corresponding to the third wavelength range, where the first distance < the second distance < the third distance. According to the seventh aspect, the optical resonator emits light according to a wavelength range. The reflective electrode 62B is an example of a first reflective electrode, the reflective electrode 62G is an example of a second reflective electrode, and the reflective electrode 62R is an example of a third reflective electrode. The optical distance LB is an example of a first distance, the optical distance LG is an example of a second distance, and the optical distance LR is an example of a third distance.
[0133] In an electro-optical device (10) according to a specific embodiment (embodiment 9) of embodiment 8, the first light-emitting region (B) and the third light-emitting region (R) are not adjacent to each other in the first and second directions in a plan view. According to the ninth aspect, the difference between the first distance (LB) and the third distance (LR), which are the optical path lengths, is the largest in the optical resonator. The first light-emitting region (B) and the third light-emitting region (R), which have such a large optical path length difference, are not adjacent to each other in the first direction and the second direction in a plan view, so that the step generated in the optical resonator can be kept small.
[0134] An electro-optical device (10) according to a specific embodiment (embodiment 10) of embodiment 1 includes a fifth light-emitting region (G2) that is arranged adjacent to the second light-emitting region (G1) in a fourth direction intersecting the third direction in a planar view and emits light in a second wavelength range, and a fifth colored layer (Cf_G) that is arranged to overlap the fifth light-emitting region (G2) and transmits light in the second wavelength range, and the first colored layer (Cf_B) includes a third region (Bb2) that is located between the second light-emitting region (G1) and the fifth light-emitting region (G2) in a planar view. According to the tenth aspect, the degree of color change can be made uniform when viewed in the row or column direction (second or first direction), when viewed in the third direction, and when viewed in the fourth direction. The F direction is an example of the fourth direction. The light-emitting region G2 marked with the symbol Fi is an example of a fifth light-emitting region, and the region Bb2 is an example of a third region.
[0135] In an electro-optical device (10) relating to a specific embodiment (embodiment 11) of embodiment 1, in a planar view, the second region (Bb1) is arranged to be in contact with the second colored layer (Cf_G), the third colored layer (Cf_R), and the fourth colored layer (Cf_G), and the second colored layer (Cf_G) and the fourth colored layer (Cf_G) are not in contact with each other.
[0136] An electronic device (300) according to a twelfth aspect includes the electro-optical device (10) according to any one of the first to eleventh aspects. [Explanation of symbols]
[0137] 10...electro-optical device, 12...scanning line, 14...data line, 100...display area, 60...substrate, 62B...reflective electrode (first reflective electrode), 62G...reflective electrode (second reflective electrode), 62R...reflective electrode (third reflective electrode), 71B...relay electrode (first relay electrode), 71G...relay electrode (second relay electrode), 71R...relay electrode (third relay electrode), 71D...dummy relay electrode, 110...pixel portion, 121, 122...transistor, 130B...OLED (first light-emitting element), 130G...OLED (second light-emitting element), 130R...OLED (third light-emitting element) , 131B...pixel electrode (first pixel electrode), 131G...pixel electrode (second pixel electrode), 131R...pixel electrode (third pixel electrode), 132...emissive layer, 133...common electrode, B...emissive region (first light-emitting region), G1...emissive region (second light-emitting region), R...emissive region (third light-emitting region), G2...emissive region (fourth light-emitting region), Ct_Px_B...contact region (first contact region), Ct_Px_G...contact region (second contact region), Ct_Px_R...contact region (third contact region), Ct_Dm...dummy contact region.
Claims
1. In plan view A first light-emitting region that emits light in a first wavelength range; A first colored layer that transmits light in the first wavelength range; a second light-emitting region disposed adjacent to the first light-emitting region in the first direction and emitting light in a second wavelength range; a second colored layer provided so as to overlap the second light-emitting region and transmitting light in the second wavelength range; a third light-emitting region disposed adjacent to the second light-emitting region in the second direction and emitting light in a third wavelength range; a third colored layer provided so as to overlap the third light-emitting region and transmitting light in the third wavelength range; a fourth light-emitting region that is disposed adjacent to the second light-emitting region in a third direction that intersects the first direction and the second direction and that emits light in the second wavelength range; a fourth colored layer provided so as to overlap the fourth light-emitting region and transmitting light in the second wavelength range; having The first colored layer is a first region overlapping the first light-emitting region in a plan view, and a second region located between the second light-emitting region and the fourth light-emitting region in a plan view, The third colored layer is a third region overlapping with the third light-emitting region in a plan view, and a fourth region located between the second light-emitting region and the fourth light-emitting region in a plan view, The second region and the fourth region at least partially overlap each other in a plan view. Electro-optical device.
2. The refractive index of the third colored layer is higher than the refractive index of the first colored layer.
2. The electro-optical device according to claim 1.
3. The refractive index of the third colored layer for light in the third wavelength range is higher than the refractive index of the first colored layer for light in the first wavelength range.
2. The electro-optical device according to claim 1.
4. The first wavelength range is shorter than the second wavelength range and the third wavelength range.
2. The electro-optical device according to claim 1.
5. The third colored layer is provided on the surface side of the first colored layer.
2. The electro-optical device according to claim 1.
6. a first light emitting element including a common electrode, a first pixel electrode, and a light emitting layer; a first relay electrode electrically connected to the first pixel electrode; a second light emitting element including the common electrode, a second pixel electrode, and the light emitting layer; a second relay electrode electrically connected to the second pixel electrode; a third light emitting element including the common electrode, a third pixel electrode, and the light emitting layer; a third relay electrode electrically connected to the third pixel electrode; having the first light emitting element emits light in the first wavelength range from the first light emitting region, the second light emitting element emits light in the second wavelength range from the second light emitting region and the fourth light emitting region, the third light emitting element emits light in the third wavelength range from the third light emitting region, the first light-emitting region is a region where the first pixel electrode and the light-emitting layer are in contact with each other, the second light-emitting region and the fourth light-emitting region are regions where the second pixel electrode and the light-emitting layer are in contact with each other, The third light-emitting region is a region where the third pixel electrode and the light-emitting layer are in contact with each other.
2. The electro-optical device according to claim 1.
7. The second region, in a plan view, a first contact region in which the first pixel electrode and the first relay electrode are connected; a second contact region in which the second pixel electrode and the second relay electrode are connected; or a third contact region in which the third pixel electrode and the third relay electrode are connected; 7. The electro-optical device according to claim 6, wherein the electro-optical device overlaps with any one of the above.
8. The first relay electrode is electrically connected to the first reflective electrode; provided between the first reflective electrode and the first pixel electrode in a cross-sectional view; The second relay electrode is electrically connected to the second reflective electrode; provided between the second reflective electrode and the second pixel electrode in a cross-sectional view; The third relay electrode is electrically connected to the third reflective electrode; provided between the third reflective electrode and the third pixel electrode in a cross-sectional view; a first distance from the first reflective electrode to the common electrode in a cross-sectional view in the first light-emitting region is a distance corresponding to the first wavelength range, a second distance from the second reflective electrode to the common electrode in a cross-sectional view in the second light-emitting region is a distance corresponding to the first wavelength range, a third distance from the third reflective electrode to the common electrode in a cross-sectional view in the third light-emitting region is a distance corresponding to the third wavelength range, 1st distance < 2nd distance < 3rd distance That is, 7. The electro-optical device according to claim 6.
9. The first light-emitting region and the third light-emitting region are not adjacent to each other in the first direction and the second direction in a plan view.
9. The electro-optical device according to claim 8.
10. In plan view a fifth light-emitting region that is disposed adjacent to the second light-emitting region in a fourth direction that intersects with the third direction and that emits light in the second wavelength range; a fifth colored layer provided so as to overlap the fifth light-emitting region and transmitting light in the second wavelength range; having The first colored layer is a third region located between the second light-emitting region and the fifth light-emitting region in a plan view; 2. The electro-optical device according to claim 1.
11. In plan view the second region is provided so as to be in contact with the second colored layer, the third colored layer, and the fourth colored layer; the second color layer and the fourth color layer are not in contact with each other; 2. The electro-optical device according to claim 1.
12. 12. An electronic apparatus comprising the electro-optical device according to claim 1.
Citation Information
Patent Citations
Electro-optical device
JP2019117941A