JP2005317438A - Display element and manufacturing method of display element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display element or the like capable of reducing degradation of image quality in efficiently emitting light from a light emitting part. <P>SOLUTION: This display device includes: the light emitting parts 120 formed on a reference flat surface SS; and an angle conversion part 110 equipped with reflecting surfaces 205 for reflecting the light from the light emitting parts 120, an emission surface 207 and flat surfaces 203, and used for reflecting the light incident on the reflecting surfaces 205 from the light emitting parts 120 in the direction of the emission surface 107 to convert its angle. The light emitting parts 120 are formed in a matrix-like form in two directions nearly perpendicular to each other on the reference flat surface SS. When it is assumed that a distance between a position M on the reflecting surface 205 and the emission surface 207, a pitch for forming the light emitting parts with respect to a predetermined direction being one of the two directions, the length of the light emitting part 120 in the predetermined direction, the length of the flat surface 203 in the predetermined direction, and the angle formed by the reflecting surface 205 and the reference flat surface SS are t, p, d, f and θ, respectively, the following conditional expression is satisfied. The conditional expression is 0≤t<p(p-d-f)(tanθ)/(p+d-f). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display element and a method for manufacturing the display element, and more particularly to a technique for an organic EL element.

  Conventionally, an organic EL display using an organic EL element is known. The organic EL display has a substrate made of a transparent member on the surface on the emission side and the surface opposite to the emission side. Since each layer constituting the organic EL element is extremely thin, the substrate is provided for fixing and reinforcing each layer constituting the organic EL element. The light from the light emitting part of the organic EL element is emitted to the outside by passing through the substrate on the emission side of the organic EL display. At this time, a part of the light from the light emitting unit may be taken into the organic EL display by being totally reflected at the interface of the substrate on the emission side. In view of this, a technique has been proposed for converting the angle of light from the light emitting section so that the organic EL display is incident at an angle less than the critical angle with respect to the emission surface of the substrate. In the organic EL display, as a technique for converting the angle of light from the light emitting unit, there are those proposed in Patent Documents 1 to 3, for example.

JP-A-10-189251 JP 2001-332388 A JP 2000-323272 A

  The techniques proposed in Patent Documents 1 and 2 provide a reflective surface that reflects light from the light emitting unit and converts the angle. Here, it is extremely difficult to provide a structure having only a reflective surface without providing a substrate or the like on the emission side of the light emitting unit. For this reason, it is conceivable that the reflecting surface is provided at a position corresponding to the periphery of the light emitting portion on the emission side substrate. In the configuration in which the reflective surface is provided at a position corresponding to the periphery of the light emitting unit in the substrate, a part of the light from the light emitting unit is totally reflected on the emission surface of the substrate, and the periphery of the light emitting unit of another pixel The light is incident on the reflection surface provided on the surface. It is considered that light incident on the reflection surface provided around the light emitting portion of another pixel can be reflected from the reflection surface or an electrode inside the light emitting portion and emitted from the emission surface of the substrate.

  However, when light supplied from a light emitting unit of a certain pixel enters a reflecting surface provided corresponding to another pixel, so-called crosstalk that emits light of a different pixel may occur. Crosstalk can cause image degradation such as blurring of the outline of an image and recognition of a ghost image that should not be displayed. The technique proposed in Patent Document 3 is to provide a diffusion plate on the exit surface of the substrate. Even when a diffusion plate is provided, it is considered that crosstalk may occur in the same manner as in Patent Documents 1 and 2.

  As described above, in a display device such as an organic EL display, there is a problem that it is necessary to prevent deterioration in image quality in order to efficiently emit light from the light emitting unit. The present invention has been made in view of the above problems, and provides a display element capable of reducing deterioration in image quality while efficiently emitting light from a light emitting unit, and a method for manufacturing the display element. Objective.

In order to solve the above-described problems and achieve the object, according to the present invention, a light emitting unit that is provided on a reference plane and that supplies light and is provided around the light emitting unit and reflects light from the light emitting unit. Light incident on the reflecting surface from the light emitting unit, and a light emitting unit and an emitting surface for emitting light from the reflecting surface and a flat surface provided between the reflecting surfaces and facing the emitting surface. And an angle conversion unit that converts the angle by reflecting the light in the direction of the exit surface, and the light emitting units are provided in a matrix in two directions substantially orthogonal to each other on the reference plane. The distance between the position and the exit surface is t, the pitch at which the light emitting portions are provided in a predetermined direction which is one of the two directions is p, the length of the light emitting portions in the predetermined direction is d, and the flat surface in the predetermined direction is If the length is f and the angle between the reflecting surface and the reference plane is θ, the following equation (1) is satisfied. It is possible to provide a display device which is characterized in that.
0 ≦ t <p (p−df) (tan θ) / (p + df) (1)

  The angle conversion unit of the display element has a reflection surface that converts the angle by reflecting light from the light emitting unit. The light reflected by the reflecting surface is converted to an angle smaller than the critical angle at the exit surface. Light that is reflected by the reflecting surface and travels in the direction of the exit surface exits outside without being totally reflected by the exit surface. The light generated in the light emitting unit and not incident on the reflecting surface proceeds as it is in the direction of the exit surface of the angle converting unit. At this time, when the distance between the reflecting surface and the emitting surface is large, the light that travels obliquely out of the light from the light emitting portion, and the light that does not enter the reflecting surface and proceeds directly to the emitting surface is critical. It may enter the exit surface at an angle greater than the angle. Light incident on the exit surface at an angle greater than the critical angle is totally reflected at the exit surface. The light totally reflected on the exit surface does not return to the direction of the original light emitting layer, but proceeds to the direction of other pixels. In order to reduce the occurrence of image blurring and ghost images, it is necessary to reduce the light traveling in the direction of other pixels.

  The display element that satisfies the formula (1) is an area for two pixels adjacent to each other in a predetermined direction, even when light from the light emitting portion of a certain pixel is totally reflected on the emission surface. Can be injected inside. For example, it is considered that there are very few cases where the crosstalk is recognized as an outline blur or a ghost image of an image as long as the emission position of light from the light emitting unit is moved by two pixels. By limiting the crosstalk in the display element to a range of up to two adjacent pixels, the display device can reduce deterioration in image quality. As a result, a display element capable of reducing deterioration in image quality while efficiently emitting light from the light emitting unit can be obtained.

Moreover, according to the preferable aspect of this invention, it is further desirable to satisfy the following formula | equation (2).
0 ≦ t <p (p−df) (tan θ) / 2 (p + df) (2)

  In the display element that satisfies the expression (2), even when light from a light emitting part is totally reflected on the exit surface, the light from the light emitting part is within a region for one pixel adjacent in a predetermined direction. Can be configured to inject. By limiting the crosstalk in the display element to a range of up to one pixel, a display element that can further reduce deterioration in image quality can be obtained.

  Moreover, according to a preferable aspect of the present invention, it is desirable that the reflecting surface is provided so as to have a longitudinal direction in at least one of two directions substantially orthogonal to each other. If the display element has a configuration in which a reflective surface is provided in at least one of the two directions, the crosstalk can be kept within a predetermined range, and deterioration in image quality can be reduced.

  Further, according to the present invention, a light emitting unit that is provided on the substrate and supplies light, a reflective surface that is provided around the light emitting unit and reflects light from the light emitting unit, and light from the light emitting unit and the reflective surface is provided. And an angle conversion unit that converts the angle of light incident on the reflection surface from the light emitting unit in the direction of the emission surface, and includes a parallel plate. Temporary adhesion process for temporarily adhering the holding substrate, and surface where the holding substrate is temporarily adhered by pressing a mold of a predetermined shape against the surface of the parallel plate opposite to the side where the holding substrate is temporarily adhered in the temporary adhesion step A mold transfer process for forming a reflective surface at a predetermined distance from the substrate, and a bonding process for bonding a parallel plate surface on which the reflective surface is formed in the mold transfer process and a substrate provided with a light emitting portion in advance. And a peeling step of peeling the holding substrate temporarily bonded to the parallel plate in the temporary bonding step, Method of manufacturing a display device characterized in that it comprises can be provided.

  The display element prevents the light from the light emitting unit from being emitted at a position farther than the area corresponding to two pixels by adjusting the distance between the position on the emission surface side of the reflection surface and the emission surface. . In the display element, it is considered that crosstalk occurs as the distance between the reflection surface and the emission surface increases. Therefore, in order to obtain a display element that can reduce the occurrence of crosstalk, it is necessary to manufacture a display element having a relatively short distance between the reflecting surface and the exit surface. In the manufacturing method of the present invention, mold transfer is performed on a parallel plate to which a holding substrate is temporarily bonded. By using the holding substrate, damage to the parallel plate can be prevented even when the mold is transferred to a thin parallel plate. By performing mold transfer on a thin parallel plate, a display element having a short distance between the reflecting surface and the emitting surface can be easily manufactured. For example, the holding substrate can be temporarily bonded using an adhesive that can be peeled off by ultraviolet rays, heat, or water, so that damage in the peeling step can be reduced. Thereby, it is possible to manufacture a display element that can reduce the damage to the parallel plates in the manufacturing process and can reduce the occurrence of crosstalk.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

  FIG. 1 shows a perspective configuration of a main part of a display device 100 using a display element according to the first embodiment. The display device 100 is an organic EL display including organic EL elements that are display elements according to the present invention. The display device 100 is configured by stacking an angle conversion unit 110 on a substrate 112. The substrate 112 is an organic EL panel having a plurality of light emitting units 120. The light emitting units 120 are provided in a matrix in the XY directions, which are two directions substantially orthogonal to each other on a reference plane substantially parallel to the substrate 112.

  The angle conversion unit 110 is a parallel flat plate made of a transparent resin member. The angle conversion unit 110 includes prism structures 102 and 104 on the surface of the substrate 112 side. The prism structures 102 and 104 are configured by a reflection surface provided around each light emitting unit 120 and a flat surface provided between the reflection surfaces. The prism structures 102 and 104 have longitudinal directions in the X direction and the Y direction, respectively, and are provided in a lattice shape between the light emitting units 120. The angle conversion unit 110 has an exit surface on the entire surface opposite to the substrate 112. The exit surface is a plane substantially parallel to the reference plane. Here, one unit of the organic EL element is one light emitting unit 120 and a part of the angle conversion unit 110 corresponding to the light emitting unit 120. The display device 100 is composed of a plurality of organic EL elements arranged in correspondence with pixels. FIG. 1 shows a perspective configuration of a portion in which four organic EL elements in the X direction and three organic EL elements in the Y direction are arranged in a matrix as a main part of the display device 100.

  Specifically, the light emitting unit 120 includes two electrode layers facing each other and a functional layer provided between the electrode layers. The functional layer of the light emitting unit 120 supplies light by applying a voltage between the two electrode layers using an external power source. One electrode of each light emitting unit 120 is connected to a TFT circuit (not shown) provided for each organic EL element. The display device 100 displays an image by a so-called active matrix method in which each organic EL element is driven by electrically accessing each TFT circuit through various wirings.

  The light emitting unit 120 supplies light to the side where the angle conversion unit 110 is provided. The light supplied from the light emitting unit 120 in a direction nearly perpendicular to the reference plane is directly emitted from the emission surface of the angle conversion unit 110. Further, the light supplied obliquely from the light emitting unit 120 is reflected by the reflecting surfaces of the prism structures 102 and 104 and then exits from the exit surface of the angle conversion unit 110. The angle conversion unit 110 reflects light incident on the reflection surface from the light emitting unit 120 in the direction of the exit surface and converts the angle. The light traveling obliquely from the light emitting unit 120 is angle-converted so that the incident angle of the light with respect to the exit surface is equal to or less than the critical angle. The angle conversion unit 110 reduces the total reflection on the exit surface by converting the angle of light from the light emitting unit 120. By providing the angle conversion unit 110, the display device 100 can efficiently extract the light from the light emitting unit 120 to the outside.

  FIG. 2 shows a cross-sectional configuration of a main part of the display device 100. In the cross-sectional configuration shown in FIG. 2, a cross section of the prism structure 102 arranged in parallel in the X direction is illustrated. The prism structure 102 has two reflecting surfaces 205 provided on the light emitting unit 120 side and a flat surface 203 provided between the two reflecting surfaces 205. The reflection surface 205 is a substantially planar inclined surface whose angle between the substrate 112 surface, in other words, a plane parallel to the reference plane SS on which the light emitting unit 120 is provided is θ. The reflection surfaces 205 on both sides of the light emitting unit 120 are provided so as to be inclined toward the emission side. The flat surface 203 is provided to face the emission surface 207. In the cross section shown in FIG. 2, the prism structure 102 is shown in a trapezoidal shape with the flat surface 203 as an upper base. The angle conversion unit 110 is configured such that the distance t between the position of the reflecting surface 205 on the exit surface 207 side, that is, the position M on the tangent line between the reflecting surface 205 and the flat surface 203, and the exit surface 207 is within a predetermined range. It is configured to be a value. Note that the angle conversion unit 110 illustrated in FIG. 2 illustrates the flat surface 203 larger than that illustrated in FIG. 1 in order to explain that the flat surface 203 is provided.

  As a comparison with the organic EL element of the present invention, an organic EL element having a configuration in which the distance between the position on the reflection surface and the emission surface is not adjusted will be described. Normally, the prism structures 102 and 104 provided on the exit surface as in the display device 100 of the present invention are extremely difficult to form alone. For this reason, the prism structures 102 and 104 are generally configured by forming the shape of the outer edge by embossing on parallel plates and then sealing the filler. When the outer edge of the prism structure is formed by embossing, a thick parallel plate is used as the material of the angle conversion part because it needs to withstand embossing. FIG. 3 shows a configuration example of a display device 300 provided with an angle conversion unit 310 formed of a thick parallel plate. The angle conversion unit 310 is configured such that the distance between the position on the reflection surface and the exit surface is a distance t ′ corresponding to about five times the height of the prism structure.

  A part of the light traveling obliquely from the light emitting unit 120 does not enter the reflection surface, but enters the exit surface of the angle conversion unit 310 as shown in FIG. The light incident on the exit surface of the angle conversion unit 310 at an angle greater than the critical angle is totally reflected by the exit surface and travels away from the light emitting unit 120 of the original pixel. Of the light reflected by the exit surface, the light incident on the light emitting unit 120 and the reflective surface of other pixels is reflected by the electrodes and the reflective surface of the light emitting unit 120 and exits from the exit surface. The display device 300 may cause crosstalk due to the light L ′ emitted from another pixel different from the original pixel. Crosstalk can cause image degradation such as blurring of the outline of an image and recognition of a ghost image that should not be displayed. In the display device 300, as the distance t 'increases, the light emitted from the pixels far from the original pixels increases. For this reason, the display device 300 is considered to increase the blurring of the outline of the image and increase the ghost image as the distance t ′ increases.

Returning to FIG. 2, the organic EL element of the present invention in the display device 100 is configured to satisfy the formula (1).
0 ≦ t <p (p−df) (tan θ) / (p + df) (1)
t is the distance between the position M on the exit surface 207 side of the reflective surface 205 and the exit surface 207. p is a pitch at which the light emitting units 120 are provided in the X direction, which is a predetermined direction. The pitch p is the same as the distance between the center positions of the adjacent light emitting units 120. d is the length of the light emitting unit 120 in the X direction which is a predetermined direction. f is the length of the flat surface 203 in the X direction which is a predetermined direction. θ is an angle formed by the reflection surface 205 and the reference plane SS. In the figure, θ is shown as an angle between the reflecting surface 205 and the surface of the substrate 112 parallel to the reference plane SS. Further, the angle conversion unit 110 has a thickness obtained by combining the height h of the prism structure 102 and the distance t.

  Of the light incident on the exit surface 207, light incident on the exit surface 207 at an angle less than the critical angle exits from the exit surface 207 to the outside. On the other hand, of the light incident on the exit surface 207, the light incident on the exit surface 207 at an angle greater than the critical angle is totally reflected by the exit surface 207 and travels toward the light emitting unit 120 of other pixels. . The light L shown in FIG. 2 forms the smallest angle β with the reference plane SS among the light directly incident on the exit surface 207. When the organic EL element is configured so as to satisfy the formula (1), even when the light L having the angle β is totally reflected on the emission surface 207, the reflection surface 205 provided two pixels ahead of the original pixel is applied. Incident. The light L incident on the reflection surface 205 provided two pixels ahead is emitted from the emission surface 207 after being reflected by the opposing reflection surface 205 or the electrode of the light emitting unit 120. Accordingly, the organic EL element can emit light at the position where the light totally reflected by the emission surface 207 is moved by two pixels in the X direction from the original pixel 220 by satisfying Expression (1). In the display device 100, by providing the organic EL element that satisfies the formula (1), even when the light from the light emitting unit 120 causes total reflection on the emission surface 207, the display device 100 is within the region for two adjacent pixels. Can be injected.

The organic EL element of the display device 100 may be further configured to satisfy the formula (2).
0 ≦ t <p (p−df) (tan θ) / 2 (p + df) (2)
When the organic EL element is configured so as to satisfy the expression (2), the light L having the angle β is incident on the reflection surface 205 provided one pixel ahead even when the light L is totally reflected on the emission surface 207. Therefore, the organic EL element can emit light totally reflected on the emission surface 207 at a position adjacent to the original pixel 220 in the X direction by satisfying the expression (2). In the display device 100, by providing the organic EL element that satisfies the formula (1), even if the light from the light emitting unit 120 causes total reflection on the emission surface 207, the display device 100 is within the region for one adjacent pixel. Can be injected. If t = 0, all the light from the light emitting unit 120 can be emitted at that position, and an organic EL element that does not cause crosstalk can be obtained.

  As shown in FIG. 4, when the R light pixel, the G light pixel, and the B light pixel are arranged in parallel in the X direction, the display device 100 displays one pixel of a full-color image by three pixels 220 arranged in parallel in the X direction. Constitute. The display device 100 can be considered to have very few cases in which the image blurring or ghost image is recognized by the observer as long as the light emission position is moved in the X direction by two pixels due to crosstalk.

  Furthermore, the organic EL element of the display device 100 can configure the angle conversion unit 110 in the Y direction in the same manner as in the X direction. In the case of the Y direction, the pitch or length in the Y direction, which is a predetermined direction, is applied to each parameter of p, d, and f in Equation (1). The display device 100 can limit the crosstalk in the Y direction to a range of up to two pixels by configuring the organic EL element to satisfy the formula (1) in the Y direction. In the display image of the display device 100, it is extremely rare for an observer to confirm blurring of about two pixels. For this reason, the display device 100 can be considered to have very few cases in which the image blurring or ghost image is recognized by the observer as long as the Y direction is moved by two pixels due to crosstalk. The organic EL element of the display device 100 can satisfy the formula (1) and can limit the crosstalk to a range of up to two adjacent pixels, and can reduce deterioration in image quality. Accordingly, there is an effect that it is possible to reduce deterioration in image quality while efficiently emitting light from the light emitting unit 120. Moreover, the organic EL element of the display apparatus 100 can further reduce deterioration in image quality by satisfying the formula (2).

In addition, although the angle conversion part 110 of the display element of a present Example shows the structure which has a substantially planar reflective surface 205, it is good also as a structure which has a curved-surface-shaped reflective surface. Further, the prism structures 102 and 104 of the angle conversion unit 110 may have a configuration in which the flat surface 203 is not provided between the reflection surfaces 205. In the case where the flat surface 203 is not provided between the reflecting surfaces 205, the organic EL element of the display device 100 can be configured to satisfy the following expression (3).
0 ≦ t <p (p−d) (tan θ) / (p + d) (3)
Further, the organic EL element of the display device 100 can be configured to satisfy the following formula (4).
0 ≦ t <p (pd) (tan θ) / 2 (p + d) (4)

  Further, the organic EL element of the display device 100 is provided with prism structures 102 and 104 each having a reflective surface 205 in the X direction and the Y direction, which are two directions substantially orthogonal to each other on the reference plane SS. The organic EL element is not limited to the configuration in which the reflective surface 205 having the longitudinal direction in the X direction and the reflective surface 205 having the longitudinal direction in the Y direction are provided. The reflection surface 205 of the organic EL element may be configured so as to have a longitudinal direction in at least one of two substantially orthogonal directions. The organic EL element can keep the crosstalk within a predetermined range as long as the reflective surface 205 is provided in at least one of two directions substantially orthogonal to each other. As a result, it is possible to obtain an effect of reducing deterioration in image quality in efficiently emitting light from the light emitting unit 120.

  FIGS. 5-1 and FIGS. 5-2 are explanatory drawings of the manufacturing method of the display element which concerns on Example 2 of this invention. The organic EL element of the display device 100 of Example 1 can be manufactured using the manufacturing method of this example. First, in step a which is a temporary bonding step, the holding substrate 501 is temporarily bonded to the parallel flat plate 510 made of a transparent resin. The holding substrate 501 is a transparent flat plate having a predetermined thickness m that can sufficiently prevent the parallel flat plate 510 from being damaged in a mold transfer step described later. The temporary adhesion between the parallel plate 510 and the holding substrate 501 is performed via the temporary adhesion layer 502.

  Next, in step b, which is a mold transfer step, the mold 503 is pressed against the surface of the parallel plate 510 opposite to the side on which the holding substrate 501 is temporarily bonded in the temporary bonding step. The mold 503 has a predetermined shape for transferring the reflecting surface 205 and the flat surface 203 to the parallel plate 510. The shape of the mold 503 is transferred to the parallel plate 510 by, for example, thermoforming such as vacuum forming or pressure forming. Then, in step c, by removing the mold 503, the reflection surface 205 is formed at a predetermined distance t from the surface temporarily bonded to the holding substrate 501. The angle conversion unit 110 is formed by processing the parallel plate 510 in steps b and c.

  Next, in step d, which is a bonding step, the surface of the angle conversion unit 110, which is a parallel plate, on the side where the reflecting surface 205 is formed in step b, and the substrate 112 on which the light emitting unit 120 is provided in advance are bonded. The bonding between the angle conversion unit 110 and the substrate 112 is performed by positioning so that the light emitting unit 120 is disposed between the reflection surfaces 205 of the angle conversion unit 110. By positioning and bonding the angle conversion unit 110 and the substrate 112 in this way, the shapes of the prism structures 102 and 104 are formed on the reflective surface 205, the flat surface 203, and the surface of the substrate 112.

  The reflective surface 205 can be formed by forming a metal thin film, for example. As the metal thin film constituting the reflection surface 205, for example, aluminum or silver can be used. The metal thin film can be formed by depositing and patterning a forming material on the substrate 112 side of the angle conversion unit 110 before bonding the angle conversion unit 110 and the substrate 112 together. When the reflective surface 205 is formed by depositing a metal thin film, the prism structures 102 and 104 can be configured by filling with an adhesive.

  In addition, when the flat surface 203 is not provided between the reflective surfaces 205, the strength of the tip portions of the prism structures 102 and 104 to be formed thereafter may be insufficient. The flat surface 203 is provided to ensure the strength of the tip portions of the prism structures 102 and 104. As long as damage to the prism structures 102 and 104 can be sufficiently prevented, the prism structures 102 and 104 may be configured by only the reflection surface 205 without providing the flat surface 203. In order to provide the reflecting surface 205 and the exit surface 207 at a sufficiently small distance t, it is desirable that the flat surface 203 be configured with as small an area as possible within a range in which the prism structures 102 and 104 can be prevented from being damaged.

  Further, the reflection surface 205 may be a total reflection surface in addition to a configuration in which a metal thin film is formed. When the reflection surface 205 of the total reflection surface is provided, the prism structures 102 and 104 can be configured by filling an inert gas such as nitrogen gas. The reflection surface 205 can totally reflect incident light by using a difference in refractive index between the resin member constituting the angle conversion unit 110 and the prism structures 102 and 104.

  In step e, which is a peeling step, the holding substrate 501 temporarily bonded to the parallel flat plate in the temporary bonding step is peeled off. Here, in order to easily peel the holding substrate 501, the temporary adhesive layer 502 is desirably an adhesive that can be peeled off by, for example, ultraviolet rays, heat, or water. By making it possible to easily peel the holding substrate 501 from the angle conversion unit 110, damage to the display device 100 can be reduced. In this way, the display device 100 can be manufactured.

  In the manufacturing method of this embodiment, by using the strong holding substrate 501, even when the mold is transferred to the thin parallel plate 510 using the mold 503, the parallel plate 510 can be sufficiently prevented from being damaged. Since the mold can be transferred onto the thin parallel plate 510, an organic EL element having a short distance t between the reflection surface 205 and the emission surface 207 can be easily manufactured. This produces an effect that an organic EL element capable of reducing the occurrence of crosstalk can be manufactured. Moreover, the damage of the parallel plate in the manufacturing process can be reduced.

  In addition, although said display apparatus 100 uses an organic EL element as a display element, it is not restricted to this. For example, as the display element, a solid light emitting element such as an inorganic EL element or a light emitting diode element (LED) may be used. The display device using the display element according to the present invention can be applied to a display panel of an electronic device. A display panel including the display element according to the present invention can be widely applied to electronic devices such as a mobile phone, a personal computer, a word processor, a PDA that is a portable information device, a television, and a car navigation system. Furthermore, the display element according to the present invention can be applied to a lighting device, electronic paper, and the like in addition to the display panel.

  As described above, the display element according to the present invention is useful when displaying a presentation or a moving image.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The principal part cross-section block diagram of a display apparatus. Explanatory drawing of crosstalk. The figure which shows the example of arrangement | positioning of a pixel and a prism structure. Explanatory drawing of the manufacturing method of the display element which concerns on Example 2 of this invention. Explanatory drawing of the manufacturing method of the display element which concerns on Example 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 Display apparatus, 102, 104 Prism structure, 110 Angle conversion part, 112 Substrate, 120 Light emission part, 203 Flat surface, 205 Reflection surface, 207 Emission surface, 220 pixels, SS reference plane, 300 Display apparatus, 310 Angle conversion part 501 Holding substrate 502 Temporary adhesive layer 503 Mold 510 Parallel plate

Claims (4)

A light emitting unit provided on a reference plane for supplying light;
Provided between the reflection surfaces provided around the light emitting unit, reflecting the light from the light emitting unit, the emission surface emitting the light from the light emitting unit and the reflection surface, and the reflection surface, An angle conversion unit that includes a flat surface facing the emission surface, and converts the angle of light incident on the reflection surface from the light emitting unit in the direction of the emission surface, and converts the angle.
The light emitting units are provided in a matrix in two directions substantially orthogonal to the reference plane,
The distance between the position on the exit surface side of the reflecting surface and the exit surface is t, the pitch at which the light emitting unit is provided in a predetermined direction that is one of the two directions is p, and the predetermined direction is the predetermined direction. When the length of the light emitting portion is d, the length of the flat surface in the predetermined direction is f, and the angle formed by the reflection surface and the reference plane is θ, the following conditional expression is satisfied: Display element to be used.
0 ≦ t <p (p−df) (tan θ) / (p + df) Furthermore, the following conditional expression is satisfied, The display element of Claim 1 characterized by the above-mentioned.
0 ≦ t <p (p−df) (tan θ) / 2 (p + df)   The display element according to claim 1, wherein the reflection surface is provided so as to have a longitudinal direction in at least one of the two directions substantially orthogonal to each other. A light emitting unit provided on the substrate for supplying light;
A reflection surface that is provided around the light-emitting unit and reflects light from the light-emitting unit; and an emission surface that emits light from the light-emitting unit and the reflection unit, the light-emitting unit to the reflection surface An angle conversion unit that converts the angle by reflecting incident light in the direction of the exit surface, and a method of manufacturing a display element,
A temporary bonding step of temporarily bonding the holding substrate to the parallel plate;
By pressing a mold having a predetermined shape against the surface of the parallel plate opposite to the surface to which the holding substrate is temporarily bonded in the temporary bonding step, the holding plate is placed at a predetermined distance from the surface to which the holding substrate is temporarily bonded. A mold transfer step for forming the reflective surface;
A bonding step of bonding the surface of the parallel plate on the side on which the reflection surface is formed in the mold transfer step and the substrate on which the light emitting unit is provided in advance;
A peeling step of peeling off the holding substrate temporarily bonded to the parallel flat plate in the temporary bonding step.

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