JP2010169964A - Display element and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal panel capable of maintaining high display quality by suppressing degradation of a transmission rate and brightness at transmission display time, without requiring excessive alignment accuracy of a prism and a pixel. <P>SOLUTION: The prism 20 of a non-focal system is provided for guiding light which enters a rear side of a reflective electrode 42 of the pixel 23, to transparent electrodes 41 of the pixel 23, which are positioned at opposite sides with the reflective electrode 42 between them, with different multiple light path angles. Without requiring excessive alignment accuracy of the prism 20 and the pixel 23, the light which enters the rear side of the reflective electrode 42 is transmitted from each transparent electrode 41 to a display direction without deflecting to a specific direction, and it is effectively used. Thereby, high display quality is maintained while suppressing degradation of the transmission rate and brightness at transmission display time, and by suppressing generation of emission lines. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display element having a pixel including a transmissive electrode portion and a non-transmissive electrode portion, and a display device including the display element.

  A display device using a liquid crystal display element as a display element has features such as light weight, thinness, and low power consumption, and thus has been applied to various fields such as OA equipment, information terminals, watches, and television receivers. .

  In particular, a liquid crystal display element using a thin film transistor (TFT) element, that is, a liquid crystal panel is used as a display device such as a mobile phone, a television receiver, or a computer because of its responsiveness.

  In recent years, with the reduction in size and weight of portable terminals, there has been a demand for display devices with high definition and wide viewing angles.

  High definition has been dealt with by miniaturization of the TFT array structure.

  On the other hand, for wide viewing angles, display devices using an OCB method, an MVA method, an IPS method, or the like using nematic liquid crystals have been studied.

  Further, in recent years, since the frequency of use outdoors has increased, a transflective liquid crystal system capable of partially reflecting display has been put into practical use in addition to the conventional transmissive display system.

  However, since the above-described transflective liquid crystal panel has a light-shielding reflective electrode and a translucent transparent electrode, it has excellent visibility both indoors and outdoors. Since the light is blocked, there is a problem that the luminance at the time of transmissive display is lowered.

  Therefore, a configuration for improving transmittance and luminance is provided by providing a microlens array having individual microlenses in the vertical and horizontal directions and guiding the light irradiated from the backlight to the reflective electrode to the transparent electrode. It is known (for example, see Patent Document 1).

JP 2006-126732 A

  However, in the above-described display element, since the microlens is a focal system, there is a problem that the alignment accuracy between the microlens and the transparent electrode is required.

  In this regard, for example, as shown in FIG. 9, a non-focal system prism 1 formed using a photosensitive acrylic resin or the like is attached to the back surface of the array substrate 2 and irradiated from the backlight to the reflective electrode 3. Although a configuration in which the light La is guided to the transparent electrode 4 can be considered, when the backlight has an orientation characteristic having a luminance peak in the front direction as shown in FIG. As a result of the light being guided, the light distribution characteristics as shown in FIG. 11 are obtained, and bright lines appear on the display, resulting in a problem that display quality is deteriorated.

  The present invention has been made in view of such points, and it is possible to improve display quality while suppressing a decrease in transmittance and luminance during transmissive display without requiring alignment accuracy more than necessary between the optical path conversion element and the pixel. An object of the present invention is to provide a display element that can be secured and a display device including the display element.

  The present invention relates to a pair of substrates disposed opposite to each other, a light modulation layer interposed between the substrates, a transmissive electrode portion that transmits light, and an incident from the display surface side adjacent to the transmissive electrode portion. A plurality of pixels having a non-transmissive electrode portion that reflects light and does not transmit light incident from the back side, and light that is about to enter the non-transparent electrode portion of the pixel from the back side. And a non-focal optical path conversion element that guides to the transmissive electrode portion side at a plurality of different optical path angles.

  And the light which injects into the back side of the non-transmission electrode part of one pixel is each guided by the several different optical path angle to the transmission electrode part side of the pixel located in the mutually opposite side with respect to this non-transmission electrode part. A non-focal optical path conversion element is provided.

  According to the present invention, the alignment accuracy more than necessary between the optical path conversion element and the pixel is not required, and the light incident on the back side of the non-transmissive electrode unit is displayed from each transmissive electrode unit in the display direction without being biased in a specific direction. It is possible to effectively utilize the light transmitted through the screen, and to suppress the decrease in the transmittance and luminance during transmissive display, and to suppress the generation of bright lines and to secure the display quality.

It is explanatory sectional drawing which shows the principal part of the display element of the 1st Embodiment of this invention. It is a front view which shows the principal part of a display element same as the above. It is a circuit diagram which shows a display element same as the above. It is explanatory sectional drawing which shows the display apparatus provided with the display element same as the above. It is a graph which shows the light distribution characteristic of the light by which the optical path was changed by the display element same as the above. It is explanatory sectional drawing which shows the principal part of the display element of the 2nd Embodiment of this invention. It is a graph which shows the light distribution characteristic of the light by which the optical path was changed by the display element same as the above. It is explanatory sectional drawing which shows the principal part of the display element of the 3rd Embodiment of this invention. It is explanatory sectional drawing which shows the principal part of the display element of a prior art example. It is a graph which shows the light distribution characteristic of the backlight of a display apparatus provided with the display element same as the above. It is a graph which shows the light distribution characteristic of the light by which the optical path was changed by the display element same as the above.

  The configuration of the first embodiment of the present invention will be described below with reference to FIGS.

  In FIG. 4, reference numeral 11 denotes a liquid crystal display device as a display device. The liquid crystal display device 11 includes a liquid crystal panel 12 which is a liquid crystal display element as a display element, and a surface disposed on the back side of the liquid crystal panel 12. With a backlight 13 as a light source device, used by transmitting light from the backlight 13 in dark places such as indoors, and reflecting and using light from the observation surface side in bright places such as outdoors, It is a so-called transflective type.

  The liquid crystal panel 12 is a color display type liquid crystal panel, in which an array substrate 15 as a substrate and a counter substrate 16 as a substrate are arranged to face each other, and a liquid crystal layer 17 as a light modulation layer and A liquid crystal panel body 19 is formed by interposing a spacer that holds the gap constant and the peripheral edge thereof is bonded by an adhesive layer 18, and arranged on the side facing the backlight 13, which is the back side of the liquid crystal panel body 19. A plurality of pixels 23 shown in FIGS. 1 to 3 are arranged in a matrix in a rectangular display region 22 (FIG. 3) located at the center. ing.

  The array substrate 15 includes, for example, a glass substrate 25 having translucency. On the main surface of the glass substrate 25 on the liquid crystal layer 17 side (upper side in FIG. 4), as shown in FIG. The scanning lines (gate wirings) 31 and the plurality of signal lines (source wirings) 32 are arranged in a lattice pattern so as to be substantially orthogonal to each other, and the scanning lines 31 and the signal lines 32 intersect each other. A thin film transistor (TFT) 33 as a switching element is provided at a position, and an alignment film such as a vertical alignment film (not shown) for aligning liquid crystal molecules of the liquid crystal layer 17 is formed so as to cover them.

  The thin film transistor 33 is a scanning line driving circuit in which a gate electrode is connected to the scanning line 31, a source electrode is connected to the signal line 32, and a pixel electrode 35 (FIG. 1 or the like) is connected to the drain electrode. Switching is controlled by applying a signal from the gate driver 36 to the gate electrode via the scanning line 31, and the pixel corresponding to the signal inputted via the signal line 32 from the source driver 37 which is a signal line driving circuit. By applying a voltage to the electrode 35 (FIG. 1), the pixels 23 are independently turned on / off (off).

  Each pixel electrode 35 includes a transparent electrode 41 that is a transmissive display portion as a transmissive electrode portion, and a reflective electrode 42 that is a reflective display portion as a non-transmissive electrode portion. The transparent electrode 41 and the reflective electrode 42 are configured to be electrically connected to each other and to be applied with the same voltage in each pixel 23.

  The transparent electrode 41 is formed in a substantially square shape by a sputtering method or the like with a transparent conductive material such as ITO (Indium Tin Oxide).

  The reflective electrode 42 is formed in a substantially square shape by a sputtering method or the like with a reflective conductive material such as aluminum, and has an area substantially equal to that of the transparent electrode 41, for example.

  Further, in the present embodiment, the transparent electrode 41 and the reflective electrode 42 are adjacent to each other in the direction intersecting (orthogonal) with respect to the scanning line 31 as shown in FIGS. For this reason, each pixel electrode 35 has a longitudinal direction in a direction intersecting (orthogonal) with respect to the scanning line 31.

  On the other hand, the counter substrate 16 includes a light-transmitting glass substrate 45, and a color filter layer (not shown), a counter electrode, an alignment film (not shown), and the like are sequentially stacked on the glass substrate 45.

  The counter electrode is formed by a sputtering method or the like at a position corresponding to the pixel electrode 35 in the display region 22 by using a transparent conductive material such as ITO.

  The liquid crystal layer 17 is a light modulation layer formed of a predetermined liquid crystal material, and can use almost all modes such as a TN mode, an IPS mode, an MVA mode, and a homogeneous mode. In the planar switching mode such as the IPS mode, the counter substrate 16 can be configured not to be provided with the counter electrode.

  Each prism 20 is a non-focal element formed of a light transmitting member such as quartz, glass, or a transparent resin such as photosensitive acrylic resin, and the liquid crystal of the array substrate 15 located on the back side. A planar light incident surface 19a of the liquid crystal panel body 19 (glass substrate 25) at a position corresponding to at least the display region 22 on the back side of the panel body 19, in the present embodiment at a position corresponding to the back side of each reflective electrode 42. Are attached via transparent adhesive layers (not shown). Each prism 20 is formed as a continuous continuous band in parallel with the scanning line 31, and is inclined at a predetermined angle from the apex 20a spaced from the liquid crystal panel body 19 up and down in the figure. The first inclined surfaces 20b and 20b formed on the first inclined surface 20b and the second inclined surface that is continuous between the first inclined surfaces 20b and 20b and the liquid crystal panel body 19 and is inclined at an angle different from that of the first inclined surfaces 20b and 20b. Optical path conversion surfaces 20d and 20d having 20c and 20c are provided. In other words, each prism 20 has a line-symmetric shape in the vertical direction in the figure.

Each prism 20 has an air interface, that is, the first inclined surface 20b and the second inclined surface 20c of the optical path conversion surfaces 20d and 20d, depending on the refractive index ratio n ₁ between air and the material constituting the prism 20. Each act to bend light. In the present embodiment, the refractive index of the substance constituting each prism 20 is set larger than the refractive index of air.

Accordingly, each prism 20 transmits the light L1 and L2 incident straightly from the backlight 13 (FIG. 4) to the back side of each reflective electrode 42 with respect to the direction perpendicular to the inclined surfaces 20b and 20c. In the direction inclined by an angle corresponding to the refractive index ratio n ₁ , that is, by refracting each of the upper and lower sides in FIG. The pixel 23 is configured to be guided to the transparent electrode 41.

  Each optical path conversion surface 20d has a corner 20e formed at a continuous position between the first inclined surface 20b and the second inclined surface 20c. Further, the first inclined surface 20b is set to an acute angle in which the inclination angle with respect to the light incident surface 19a is larger than the inclination angle with respect to the light incident surface 19a of the second inclined surface 20c. Furthermore, the first inclined surface 20b and the second inclined surface 20c are set to have substantially the same length to the corner 20e.

  The backlight 13 converts light from a light source such as a lamp into planar light by a light guide plate as a light guide, and irradiates the entire back side of the liquid crystal panel 12 with the planar light. . As in the conventional example, the backlight 13 has an alignment characteristic having a luminance peak in the front direction as shown in FIG. 10, that is, a Gaussian distribution characteristic.

  Next, the operation of the first embodiment will be described.

  When the liquid crystal display device 11 is used in a bright place such as outdoors (during reflective display), the thin film transistor 33 is sequentially driven by a signal from the gate driver 36 with the backlight 13 turned off, and the thin film transistor 33 turned on. A voltage corresponding to the signal from the source driver 37 generated corresponding to the image signal is applied to the pixel electrode 35 (the transparent electrode 41 and the reflective electrode 42), and the liquid crystal of the liquid crystal layer 17 corresponding to the applied voltage An image is displayed by changing the tilt angle of the molecule and reflecting the light incident from the outside on the display side by the reflective electrode 42 of each pixel 23.

  On the other hand, when the liquid crystal display device 11 is used in a dark place such as indoors (during transmissive display), the backlight 13 is turned on and the pixel electrode 35 (the transparent electrode 41 and the reflective electrode 42) is applied in the same manner as described above. The image is displayed by changing the tilt angle of the liquid crystal molecules of the liquid crystal layer 17 according to the applied voltage and transmitting the light incident from the backlight 13 through the transparent electrode 41 of each pixel 23. The

  At this time, the light from the backlight 13 is irradiated on the entire back surface of the liquid crystal panel 12 in a planar shape, but is incident on the reflective electrode 42 when passing through the optical path conversion surfaces 20d and 20d of each prism 20. L1 and L2 are guided to the respective transparent electrodes 41 located on the upper side and the lower side of the reflective electrode 42 in FIG. 1 by the inclined surfaces 20b and 20c, respectively, with different optical path angles. As shown in FIG. 5, the light is transmitted through the transparent electrode 41 and emitted to the display side so as to have a light distribution characteristic having a peak only in the front direction.

  As described above, in the first embodiment, the light L1 and L2 incident on the back side of each reflective electrode 42 at the time of transmissive display are used as a plurality of different pixels 23, for example, pixels on which the lights L1 and L2 are incident. A plurality of different, for example, non-focal system prisms 20 for guiding at two optical path angles are provided on each of the 23 transparent electrode 41 side and the transparent electrode 41 side of the pixel 23 adjacent to the pixel 23.

  For example, in the conventional case of using an optical path conversion element provided with a microlens array of a focal system that refracts light incident on the back side of the reflective electrode 42 and guides it to the transparent electrode side, the focal position of each microlens is While it is necessary to match the position of the pixel 23 and high alignment accuracy is required, in the present embodiment, alignment accuracy more than necessary between each prism 20 and the pixel 23 is not required. In addition, the light L1 and L2 incident on the back side of each reflective electrode 42 are transmitted effectively from each transparent electrode 41 to the front in the display direction without being biased in a specific direction, and are used effectively. The light L1 and L2, which are normally reflected and not used by the reflective electrode 42, can be effectively used on the transparent electrode 41 side to improve the apparent transmittance and transmit the light. Reduces brightness when displaying .

  Further, since the apparent transmittance is improved and the decrease in luminance at the time of transmissive display can be suppressed, the luminance of the backlight 13 does not need to be increased more than necessary even during transmissive display, and energy saving can be achieved.

  Also, the light guided to the transparent electrode 41 by each optical path conversion surface 20d is irradiated to a plurality of different positions in the same transparent electrode 41 by the inclined surfaces 20b and 20c, so that the light distribution of the emitted light As shown in FIG. 5, it is possible to prevent a luminance peak from being formed at a specific position other than the front direction. I can expect.

  Moreover, in the conventional case using a microlens array, the light from the backlight 13 must also be ideal parallel light (collimated light), and it is easy to make such parallel light incident from the backlight 13. On the other hand, as in the present embodiment, by using the non-focal system prism 20, the light L1 and L2 can be guided to the transparent electrode 41 while maintaining the alignment characteristics of the backlight 13. Even for the backlight 13 having a luminance peak in the front direction, that is, a Gaussian orientation characteristic, used in such a product, a sufficient increase in transmittance can be expected without generating bright lines.

  In particular, when the liquid crystal layer 17 is in the MVA mode or the homogeneous mode using a circularly polarizing plate for the liquid crystal panel 12, the transmittance increasing effect is further increased.

  Furthermore, by forming the prism 20 as a continuous body that is continuous in parallel with the scanning line 31, it is possible to design the positioning accuracy in the direction parallel to the scanning line 31 with almost no requirement, thereby improving the productivity. To do.

  Further, since the prism 20 is formed symmetrically in the vertical direction in FIG. 1, at the time of transmissive display, for example, an image displayed on the liquid crystal panel 12 is viewed from the upper side in FIG. 1 and from the lower side in FIG. Even when viewed, if the absolute values of the angles are equal to each other with respect to the center position, there is almost no difference in luminance, and it is possible to prevent visibility from changing according to the viewing angle direction due to light from the backlight 13. .

  Next, a second embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the second embodiment, prisms 48 as optical path conversion elements are attached to the liquid crystal panel 12 (glass substrate 25) in place of the prisms 20 of the first embodiment.

  Each prism 48 is a non-focal element formed as a continuous continuous band in parallel with the scanning line 31 by a light transmitting member such as quartz, glass, or a transparent resin such as photosensitive acrylic resin. The portion of the array substrate 15 located on the back side corresponding to at least the display area 22 on the back side of the liquid crystal panel main body 19, in the present embodiment, the position corresponding to the back side of each reflective electrode 42 (the glass panel main body 19 (glass The light is incident on the light incident surface 19a of the substrate 25) via a transparent adhesive layer (not shown). Further, each prism 48 is continuously curved from the apex 48a spaced from the liquid crystal panel body 19 to the array substrate 15 in the vertical direction in the figure in a smooth curved surface shape (circular arc surface shape) without a step. Optical path conversion surfaces 48b and 48b are provided, and the shape is line-symmetric in the vertical direction in the figure.

Each prism 48 acts so that the interface with the air, that is, each of the optical path conversion surfaces 48b and 48b bends the light according to the refractive index ratio n ₂ between the air and the material constituting the prism 48. In the present embodiment, the refractive index of the substance constituting each prism 48 is set larger than the refractive index of air.

Therefore, each prism 48 advances the light L1 and L2 that travels straight from the backlight 13 to the back side of each reflective electrode 42 in a direction inclined by an angle corresponding to the refractive index ratio n ₂ , that is, A plurality of different optical path angles are refracted on both the upper and lower sides in FIG. 6 and guided to the transparent electrode 41 of the same pixel 23 and the transparent electrode 41 of the adjacent pixel 23.

  Each optical path conversion surface 48b is formed such that the inclination angle with respect to the light incident surface 19a is large on the apex 48a side, and the inclination angle gradually decreases toward the light incident surface 19a side. In other words, the point is formed so as to approach the apex 48a.

  Then, the light L1 and L2 are guided to the different transparent electrodes 41 on the upper and lower sides by a plurality of different optical path angles by the optical path conversion surfaces 48b and 48b of the prism 48 which is a non-focal optical element. By having the same configuration as that of the first embodiment, the same operational effects as those of the first embodiment can be obtained.

  Further, by forming the optical path conversion surface 48b by curving it into an arcuate surface, the lights L1 and L2 can be continuously guided at a number of optical path angles, so that a specific position excluding the front direction as shown in FIG. The luminance peak can be further suppressed, and generation of bright lines and the like can be more reliably suppressed to ensure display quality.

  In the second embodiment, the optical path conversion surfaces 48b and 48b may be formed so that the inclination angle gradually increases toward the light incident surface 19a.

  Next, a third embodiment will be described with reference to FIG. In addition, about the structure and effect | action similar to said each embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the third embodiment, instead of the prisms 20 of the first embodiment, a prism sheet 53 as an optical path conversion element is provided on a liquid crystal panel 12 (glass substrate 25) via a transparent adhesive layer (not shown). Is pasted.

  The prism sheet 53 includes a sheet main body 54 that is a transmission portion as an optical path conversion element main body formed into a sheet shape by a member having translucency, and a plurality of optical path conversion portions that are integrally formed with the sheet main body 54. And a prism portion 55. The prism sheet 53 is formed by, for example, melt extrusion molding or an imprint technique using a photosensitive resin material.

  Each prism section 55 is a non-focal optical element section, similarly to the prism 20 of the first embodiment, is formed at a position corresponding to the back side of each reflective electrode 42, and the scanning line 31. The first inclined surfaces 55b and 55b, and the second inclined surfaces 55c and 55c, which are formed continuously in a strip shape parallel to the upper surface of the sheet main body 54 and are inclined upward and downward in the figure from the vertex 55a, respectively. The optical path conversion surfaces 55d and 55d are provided.

  Each optical path conversion surface 55d has a corner 55e formed at a continuous position between the first inclined surface 55b and the second inclined surface 55c. Further, the first inclined surface 55b is set to an acute angle in which the inclination angle with respect to the light incident surface 19a is larger than the inclination angle with respect to the light incident surface 19a of the second inclined surface 55c. Further, the first inclined surface 55b and the second inclined surface 55c are set to have substantially the same length to the corner portion 55e.

  When the liquid crystal display device 11 is used in a bright place such as outdoors (during reflective display), the liquid crystal panel 12 operates in the same manner as in the above embodiments, and the liquid crystal display device 11 is placed in a dark place such as a room. In the case of use in (when transmissive display), the liquid crystal panel body 19 operates in the same manner as in each of the above embodiments, and the light from the backlight 13 irradiates the entire back surface of the liquid crystal panel 12 in a planar shape. The light L1 and L2 incident on the reflective electrode 42 when passing through the optical path conversion surfaces 55d and 55d of the prism portions 55 of the prism sheet 53 are opposite to the reflective electrode 42, that is, the reflective electrode. The transparent electrode 41 of the same pixel 23 as that of the pixel 42 and the transparent electrode 41 of the pixel 23 adjacent to the pixel 23 are guided at different optical path angles to transmit the transparent electrodes 41 and 41 to the display side. Emitted.

  In this way, the light L1 and L2 are guided to the different transparent electrodes 41 on the upper and lower sides by a plurality of different optical path angles by the prism portions 55 of the prism sheet 53 which is a non-focal optical element. By having the same configuration as that of the first embodiment, the same operational effects as those of the first embodiment can be obtained.

  Further, the optical path conversion element is constituted by the prism sheet 53 in which the sheet main body 54 and the prism portion 55 are integrally formed in advance, so that the prism sheet 53 is simply attached to the liquid crystal panel main body 19 (glass substrate 25). Since each prism portion 55 is arranged at a position corresponding to each reflective electrode 42, each prism portion 55 and each pixel 23 (reflective electrode 42) are compared with the case where the individual prism portions 55 are independently aligned. ) Can be easily aligned.

  In the third embodiment, the optical path conversion surfaces 55d and 55d may have the same shape as the optical path conversion surfaces 48b and 48b of the second embodiment.

  In the first and third embodiments, the inclination angle of the second inclined surfaces 20c and 55c with respect to the light incident surface 19a is set to the inclination angle of the first inclined surfaces 20b and 55b with respect to the light incident surface 19a. You may set larger than.

  In each of the above embodiments, the non-transmissive electrode portion is not limited to the reflective electrode 42 that can reflect the light incident from the backlight 13 side, but includes a light absorbing portion that absorbs light from the backlight 13 side. Any electrode that does not transmit light incident from the back side, such as an electrode, can be arbitrarily selected.

  Further, the light modulation layer is not limited to the liquid crystal layer 17.

  Each prism 20, each prism portion 55 of each prism sheet 53, each notch 62, and each concave groove 65, 67 are arranged in parallel to the signal line 32 or any other wiring such as an auxiliary capacitance line. Even in this case, similar effects can be obtained.

  Further, for example, when the reflective electrode 42 is formed in each pixel 23 with the transparent electrode 41 sandwiched in the same pixel 23, the light L1, L2 is transmitted to each transparent electrode in the same pixel 23 by each optical path conversion unit. You may make it lead to 41.

11 Liquid crystal display device as a display device
12 Liquid crystal panels as display elements
13 Backlight
Array substrate which is 15 substrate
16 counter substrate
17 Liquid crystal layer as light modulation layer
20, 48 Prism as optical path conversion element
20b, 55b 1st inclined surface
20c, 55c 2nd inclined surface
20d, 48b, 55d Optical path conversion surface
23 pixels
31 Scanning lines that are wiring
41 Transparent electrode as transparent electrode
42 Reflective electrode as non-transmissive electrode
53 Prism sheet as an optical path conversion element

Claims (5)

A pair of substrates disposed opposite each other;
A light modulation layer interposed between these substrates,
A plurality of pixels having a transmissive electrode portion that transmits light, and a non-transmissive electrode portion that is adjacent to the transmissive electrode portion and reflects light incident from the display surface side and does not transmit light incident from the back side;
A non-focal optical path conversion element that guides light to be incident on the non-transmissive electrode part of the pixel from the back side to the transmissive electrode part side of the adjacent pixel at a plurality of different optical path angles. A display element characterized by comprising: The optical path conversion element is
A first inclined surface that is spaced apart from the substrate side that is located on the back side and is inclined at a predetermined angle, and an angle different from the first inclined surface that is continuous between the first inclined surface and the substrate side. The display element according to claim 1, further comprising an optical path conversion surface having a second inclined surface inclined at the point. 2. The display according to claim 1, wherein the optical path conversion element includes a continuous optical path conversion surface curved in a curved shape from a position separated from the substrate located on the back side to the substrate side. element. A wiring connected to the pixel;
The display element according to claim 1, wherein the optical path conversion element is formed continuously in parallel with a part of the wiring. A display element according to any one of claims 1 to 4,
A display device comprising: a backlight for irradiating light from the back side to the display element.

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