Display device and display optical component

Abstract

To achieve the quality which may be required in display.SOLUTION: A display device 10 is configured to perform display directed towards a visual contact side. The display device 10 comprises: a plurality of display units 11a-e which emits display light; and a mirror plate 21 which is provided as one component for the plurality of display units 11a-e, and arranged in such a manner that the display light from the display units 11a-e is directed to the visual contact, and comprises a plurality of laminated layers. Each of the plurality of layers includes: a base material layer 22; an optical function-imparting layer 23 which has such a heat-induced dimensional change characteristic that it shrinks more easily than the base material layer 22 and which imparts an optical function to the mirror plate 21; and balancer layers 25a, 25b which are disposed opposite the optical function-imparting layer 23 in such a manner that the base material layer 22 is interposed between the balancer layers and the optical function-imparting layer 23, wherein each of the balancer layers 25a, 25b has a heat-induced dimensional change characteristic closer to that of the optical function-imparting layer 23 than the base material layer 22 so that each of the balancer layers 25a, 25b has stress balance with respect to the optical function-imparting layer 23 side.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The disclosure according to this specification relates to display technology.

Background Art

[0002] Patent Document 1 discloses a display optical component called a mirror and a display device using the component. The mirror is composed of a base material layer and an optical function-imparting layer called a mirror coat layer in a laminated state.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the configuration of Patent Document 1, when heat is applied to the mirror, it may be difficult to maintain the originally intended shape or structure due to differences in the shrinkage of each layer, etc. There is a concern that the quality required in display cannot be maintained due to changes in shape or structure.

[0005] One of the purposes of the disclosure of this specification is to provide a display optical component capable of realizing the quality required in display and a display device including the component.

Means for Solving the Problems

[0006] One of the aspects disclosed herein is a display device configured to perform display toward the viewing side, a plurality of display units (11a to e) that emit display light, a component provided for each of the plurality of display units and arranged to direct the display light from each display unit toward the viewing side, the component being a display optical component (21) including a plurality of layers in a laminated state. The plurality of layers include a base material layer (22), an optical function - imparting layer (23) having heat - dimensional change characteristics that are more likely to shrink than the base material layer and imparting an optical function to the display optical component, a balancer layer (25a, 25b) that is disposed on the opposite side of the base material layer with respect to the optical function - imparting layer and has heat - dimensional change characteristics closer to the optical function - imparting layer than the base material layer so as to achieve stress balance with the optical function - imparting layer side, An additional adjustment layer (26) that is laminated on a part of the region formed by the surface of the balancer layer and locally adjusts the stress balance. and have. Another aspect of the embodiments disclosed herein is a display device mounted on a vehicle (1) in which a plurality of seats are arranged and configured to perform a display directed toward the viewing side, A plurality of display units (11a to 11e) that emit display light, A component provided for each of the plurality of display units and arranged to direct the display light from each display unit toward the viewing side, the display optical component (21) having a plurality of layers in a laminated state, A rear unit (38) that is arranged on the rear side, which is the opposite side of the display optical component, and performs a display from the rear side, different from the display unit, The plurality of layers include A base material layer (22), An optical function imparting layer (23) having a heating dimensional change characteristic that is more likely to shrink than the base material layer and imparts an optical function to the display optical component, An optical function imparting layer is arranged on the opposite side of the base material layer, and a balancer layer (25a, 25b) having a heating dimensional change characteristic closer to the optical function imparting layer than the base material layer is provided so as to balance the stress with the optical function imparting layer side. The display optical component has light transmissibility, The optical function imparting layer imparts a reflection function of the display light by the display unit as an optical function, and forms a virtual image (VI) visible from a plurality of seats on the rear side. On the other hand, since the balancer layer has viewing angle controllability or polarization, the display by the rear unit is selectively visualized for some of the predetermined seats. Another aspect of the embodiments disclosed herein is a display device configured to perform a display directed toward the viewing side, A plurality of display units (11a to 11e) that emit display light, A component provided for each of the plurality of display units and arranged to direct the display light from each display unit toward the viewing side, the display optical component (21) having a plurality of layers in a laminated state, An illumination unit (36) that is arranged on the rear side, which is the opposite side of the display optical component, and provides an illumination effect from the rear side. The plurality of layers include A base material layer (22), An optical function imparting layer (23) having a heating dimensional change characteristic that is more likely to shrink than the base material layer and imparts an optical function to the display optical component, A balancer layer (25a, 25b) which is arranged on the opposite side of a base material layer across an optical function-imparting layer and has a heating dimensional change characteristic closer to the optical function-imparting layer than the base material layer so as to achieve stress balance with the optical function-imparting layer side. The display optical component has light transmissibility. Due to the balancer layer having a decorative pattern (WGP), it is configured to be switchable between a first state in which the decorative pattern is difficult to visually recognize from the viewing side when the lighting unit is on and a second state in which the decorative pattern is visually recognizable from the viewing side when the lighting unit is off.

[0007] Another one of the aspects disclosed herein is a display optical component used for display, comprising a plurality of layers in a laminated state, wherein the plurality of layers include a base material layer (22), an optical function - imparting layer (23) having heat - dimensional change characteristics that are more likely to shrink than the base material layer and imparting an optical function, The balancer layers (25a, 25b) are arranged on the opposite side of the base material layer across the optical function-imparting layer, and have heating dimensional change characteristics closer to the optical function-imparting layer than the base material layer so as to achieve stress balance with the optical function-imparting layer side. An additional adjustment layer (26) which is laminated on a part of the region formed by the surface of the balancer layer to locally adjust stress balance. It has.

[0008] According to these aspects, in a display optical component including a plurality of layers in a stacked state, a balancer layer is arranged on the opposite side of the optical function-imparting layer across the base material layer. The balancer layer achieves stress balance with the optical function-imparting layer side. Therefore, even if the optical function-imparting layer has heating dimensional change characteristics that make it more likely to shrink than the base material layer, the balance of stress on both sides across the base material layer during heating can be obtained, so that the shape and structure of the display optical component are more likely to be maintained. Therefore, the quality required in display can be realized.

[0009] The reference numerals in parentheses exemplify the correspondence with the parts of the embodiments described later, and are not intended to limit the technical scope.

Brief Description of Drawings

[0010]

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Mode for Carrying Out the Invention

[0011] Hereinafter, a plurality of embodiments will be described with reference to the drawings. In each embodiment, the same reference numerals may be given to corresponding components, and redundant explanations may be omitted. When only a part of the configuration is described in each embodiment, for the other parts of the configuration, the configurations of other embodiments described previously can be applied. Also, not only the combinations of configurations explicitly shown in the description of each embodiment, but also the configurations of a plurality of embodiments can be partially combined with each other without causing any problem in the combination, even if not explicitly shown.

[0012] (First Embodiment) As shown in FIGS. 1 to 3, the display device 10 according to the first embodiment of the present disclosure is mounted on the vehicle 1. The display device 10 is installed on the instrument panel 2 that faces the seat where the occupant (including the driver DRV) as the viewer is seated in the front-rear direction of the vehicle 1.

[0013] In the instrument panel 2 shown in FIGS. 1 and 2, there is provided an accommodation chamber 2a for accommodating the display device 10. The accommodation chamber 2a is formed so as to extend in the left - right direction of the vehicle 1 from the driver's seat facing portion facing the driver's seat to the passenger seat facing portion facing the passenger seat.

[0014] A visor hood 3 is provided on the ceiling portion of the accommodation chamber 2a. The visor hood 3 is formed of, for example, a synthetic resin having light - shielding properties. The visor hood 3 is formed so as to extend linearly over the entire left - right direction of the vehicle 1 from the A - pillar on the left side of the vehicle 1 to the A - pillar on the right side. The visor hood 3 suppresses the reduction of the visibility of the display of the display device 10 due to external light incident into the vehicle interior through the front windshield 4 or the like. For this reason, the rear end portion of the visor hood 3 is formed so as to protrude along the front - rear direction of the vehicle 1 from the lower end portion of the front windshield 4 to a position on the driver's seat side rather than the display device 10.

[0015] Furthermore, the visor hood 3 has a recess formed on the lower surface portion facing the lower side of the vehicle 1 so that a display panel 14 described later can be fitted therein. In this way, the visor hood 3 also has a function as a case for accommodating the housing of the display device 10.

[0016] The steering wheel 5 is held at a position corresponding to the lower part of the accommodation chamber 2a. The upper part of the steering wheel 5 is located between the display device 10 and the headrest of the driver's seat. The steering wheel 5 constitutes an operation part operated by the driver DRV sitting on the driver's seat in a steering system for steering the vehicle 1. The steering wheel 5 has an annular rim portion and a connecting portion for connecting the rim portion to the steering shaft. The connecting portion has a center pad portion arranged on the axis of the steering shaft and a spoke portion or the like extending in the radial direction of the rim portion for connecting the center pad portion and the rim portion.

[0017] And, in the steering wheel 5, an opening 5a that is surrounded by a rim portion and a connecting portion and opens is formed. The opening 5a is located in the upper part of the steering wheel 5 in the correct posture of the steering wheel 5 (that is, the posture corresponding to the steering nucleus when the vehicle 1 goes straight). Thereby, the driver DRV can visually recognize the display at the front position of the driver's seat among the displays of the display device 10 through the opening 5a.

[0018] The display device 10 of the present embodiment can perform virtual image display toward a plurality of passengers including the driver DRV seated in the driver's seat and the passenger seated in the passenger seat. Here, the side where the driver's seat and the passenger seat exist with respect to the display device 10 is defined as the visual recognition side. The display device 10 has a configuration including a plurality of image display units 11a to 11e, a mirror plate 21, a rear unit 31, and the like.

[0019] The image display units 11a to 11e are held by the visor hood 3 as described above. The image display units 11a to 11e are arranged in a plurality and arranged so as to extend from the A-pillar on the left side of the vehicle 1 to the A-pillar on the right side.

[0020] Each of the image display units 11a to 11e has a configuration including a circuit board 12, a flexible wiring board 13, a display panel 14, and the like. As shown in FIG. 1, the circuit board 12 is formed in a flat plate shape by a synthetic resin such as glass epoxy resin, for example. The circuit board 12 has a conduction pattern formed on at least one surface. A control circuit composed of a plurality of electronic components and conduction patterns is provided on the circuit board 12. The control circuit can communicate with a control device 50 (see FIG. 3) by wired communication or wireless communication, and can control the display panel 14 based on an input signal from the control device 50.

[0021] The control device 50 may be provided inside the display device 10 and have a cooperation function for controlling so as to cooperate a plurality of image display units 11a to 11e. On the other hand, the control device 50 may be an in-vehicle ECU or the like provided outside the display device 10.

[0022] The flexible printed circuit board 13 is formed by attaching a thin film-like sheet with a conductive pattern to a base film made of, for example, polyimide or the like. One end of the flexible printed circuit board 13 is electrically connected to the circuit board 12. The other end of the flexible printed circuit board 13 is electrically connected to the display panel 14.

[0023] The display panel 14 employs, for example, an OLED display, a liquid crystal display, etc., and has a panel shape. As shown in FIG. 2, the display panel 14 has a planar display screen 14a facing downward below the vehicle 1 on the side opposite to the visor hood 3. The display screen 14a has a rectangular outer shape with pixels arranged in the longitudinal and lateral directions. By controlling the display state of each pixel by a control circuit, the display screen 14a can emit light and display an image downward. The display screen 14a can display a color image, but may also be configured to display a monochrome image or a single-color image.

[0024] For example, five image display units 11a to 11e may be provided. The display screens 14a of the respective image display units 11a to 11e may be arranged along a common virtual plane. In this arrangement, since each virtual image VI that can be displayed by each of the image display units 11a to 11e is imaged at a continuous position, the overall display unity can be improved. On the other hand, the display screens 14a may be arranged so as to form steps with each other. In this arrangement, since each virtual image VI that can be displayed by each of the image display units 11a to 11e is imaged at positions that are in front of and behind each other, a three-dimensional effect can be imparted to the overall display.

[0025] When the vehicle 1 is a left-hand drive vehicle, among the five image display units 11a to 11e, the second image display unit 11b counted from the left may be responsible for the display at the front position of the driver's seat. That is, the second image display unit 11b counted from the left may display a virtual image VI that is visually recognized through the opening 5a of the steering wheel 5.

[0026] The content displayed by each of the image display units 11a to 11e in the left-hand drive vehicle may be based on, for example, the following allocation. The content by the first image display unit 11a counted from the left may be so-called electronic mirror content that displays an image captured by a left-rear camera that captures the left-rear of the vehicle 1. The content by the second image display unit 11b counted from the left may be so-called meter content that displays various driving information of the vehicle 1 (for example, driving speed, driving mode, driving distance, battery remaining amount, etc.). The content by the third image display unit 11c counted from the left may be so-called navigation content that displays navigation information (for example, an image guiding the current location of the vehicle 1 and the route to the destination, road information, etc.). The content by the fourth image display unit 11d counted from the left may be content that displays entertainment video and information related to the in-vehicle air conditioner. The content by the fifth image display unit 11e counted from the left may be so-called electronic mirror content that displays an image captured by a right-rear camera that captures the right-rear of the vehicle 1.

[0027] When the vehicle 1 is a right-hand drive vehicle, content with the left and right order reversed with respect to the case of the above-mentioned left-hand drive vehicle may be assigned to each image display unit. Also, the content assignment may be changed to a preferred assignment by the occupant, for example, in response to a setting operation by the occupant.

[0028] The mirror plate 21 is an optical component formed in a plate shape having light transmissibility using, for example, a synthetic resin such as an acrylic resin. The mirror plate 21 is arranged so as to face the visor hood 3 and each display screen 14a. The mirror plate 21 is arranged in an inclined posture so as to face the driver's seat side more as it goes from above the vehicle to below the vehicle.

[0029] The mirror plate 21 is formed to extend across the entire left - right direction of the vehicle 1, from the A - pillar on the left side to the A - pillar on the right side of the vehicle 1, similar to, for example, the visor hood 3. That is, one mirror plate 21 is provided for a plurality of image display units 11a - e. By providing a plurality of image display units 11a - e, it becomes possible to use a display panel 14 with a general aspect ratio. Further, by providing one mirror plate 21 that is directly visible to the occupant, it becomes possible to improve the sense of unity between the left and right pillars. On the other hand, due to the enlargement of the mirror plate 21, measures against deformation such as a configuration with a balancer layer 25b as described later are required.

[0030] The mirror plate 21 directs the display light emitted from each display screen 14a toward the viewing side. Specifically, the mirror plate 21 reflects the display light emitted from each display screen 14a toward the viewing side. Then, the mirror plate 21 forms a virtual image VI visible to the driver DRV sitting in the driver's seat and the occupant sitting in the passenger seat at a position on the side opposite to the driver's seat and the passenger seat (defined as the back side) with the mirror plate 21 interposed therebetween. Here, in the mirror, the reflection surface that faces each display screen as well as the driver's seat and the passenger seat and reflects the display light has a curved - surface shape that makes it easy for the driver DRV sitting in the driver's seat and the occupant sitting in the passenger seat to view the virtual image VI.

[0031] As shown in FIGS. 2, 4, and 5, for example, the curved surface shape of the reflecting surface may be a concave cylindrical surface that is curved in a concave shape. More specifically, in a cross-section CS1 along the left-right direction of the vehicle 1 in the cross-section of the mirror plate 21, the reflecting surface is curved so as to draw a gentle curve. The cross-section CS1 may be referred to as a cross-section along the longitudinal direction of the mirror plate 21. The gentle curve here is a curve that realizes the shape of the mirror plate 21 such that the display device 10 can be accommodated in the accommodation chamber 2a. For example, the gentle curve is a curve such that the depth of the mirror plate 21 formed so as to extend across the entire left-right direction of the vehicle 1 is smaller than the depth of the accommodation chamber 2a in the instrument panel 2. On the other hand, in a cross-section CS2 along the short-side direction of the mirror plate 21, which is orthogonal to the cross-section CS1 in the cross-section of the mirror plate 21, the reflecting surface extends so as to draw a straight line.

[0032] Due to such a curved surface shape of the reflecting surface, the mountability of the mirror plate 21 on the vehicle 1 and the designability when incorporated into the instrument panel 2 are improved. Furthermore, each virtual image VI is continuously arranged so as to be disposed on a curved surface that curves in the left-right direction. Due to such an imaging position of each virtual image VI, the virtual image display is directed to the driver DRV seated in the driver's seat and the passenger seated in the passenger seat so as to surround them.

[0033] In particular, the mirror plate 21 of the present embodiment has light transmissibility. The light transmissibility here may include at least one of the property of transmitting visible light and the property of transmitting near-infrared light. The property of transmitting visible light here may be the property of transmitting light of all wavelengths in visible light, or may be the property of transmitting light of some wavelengths in visible light. By giving the mirror plate 21 light transmissibility, it is possible to add a function that uses light to the rear unit 31 disposed on the rear side.

[0034] As shown in FIGS. 4 to 7, the mirror plate 21 forms a plate-like portion by a structure including a plurality of layers in a laminated state. For example, the plurality of layers include a base material layer 22, an optical function-imparting layer 23, a protective layer 24, and a balancer layer 25a (25b).

[0035] The base material layer 22 is formed in a plate shape from a synthetic resin material having light transmissibility such as PMMA resin, PC resin, etc. The base material layer 22 is formed, for example, by injection molding. The base material layer 22 ensures the basic strength of the mirror plate 21. The base material layer 22 may be set to a thickness of, for example, 1 to 5 mm. The base material layer 22 may be formed to be colorless and transparent with a light transmittance of 90% or more for visible light, for example. The base material layer 22 may be formed in a smoked tone with a light transmittance of 3 to 90% for visible light, for example. Note that the transmittance shown in this embodiment is the energy transmittance, and the reflectance is the energy reflectance.

[0036] The optical function-imparting layer 23 is a layer that imparts an optical function to the mirror plate 21. The optical function-imparting layer 23 is disposed closer to the visual recognition side than the base material layer 22. The function imparted by the optical function-imparting layer 23 to the mirror plate 21 is a reflection function. The reflectance of the display light by the optical function-imparting layer 23 is preferably set to 30% or more, for example. Thereby, the mirror plate 21 of this embodiment can be recognized by the occupant like a half mirror.

[0037] The optical function-imparting layer 23 that imparts a reflection function may be a film material or a sheet material in which a metal thin film is vapor-deposited on a resin film. The film material or the sheet material may be disposed in a state of being attached to the base material layer 22. Further, the optical function-imparting layer 23 that imparts a reflection function may be an optical multilayer film formed by laminating inorganic compounds or metal oxides, etc. The optical multilayer film is formed, for example, in the form of a film material or a sheet material, and may be disposed in a state of being attached to the base material layer 22.

[0038] Such film materials or sheet materials are manufactured by a manufacturing method in which raw materials are rolled and stretched to be thinly formed and then wound up in a roll shape. Therefore, the thickness of the optical function-imparting layer 23 is set to be sufficiently smaller than the thickness of the base material layer 22.

[0039] In addition, as a result of the molecular chains being oriented in the stretching direction, residual stress remains inside the film material or sheet material. Therefore, the optical function-imparting layer 23 has heating dimensional change characteristics that are more likely to shrink than the base material layer 22. When heat is applied to the film material or sheet material during the manufacture of the mirror plate 21, a change in the residual stress may occur, which may cause the film material or sheet material to shrink and deform. Although this phenomenon does not occur as much during manufacture, it may also occur when the interior of the vehicle cabin becomes hot depending on the environment.

[0040] The heating dimensional change characteristics referred to here may be quantified by a value representing the dimensional change (change in the distance between the scale lines in the longitudinal and transverse directions of the test piece), measured by the method for measuring the heating dimensional change of films and sheets described in JIS K7133:1999, as a percentage of the initial distance between the scale lines. According to this quantification, a negative value indicates the characteristic of shrinking upon heating, and a positive value indicates the characteristic of expanding upon heating. When comparing the values for two materials, it can be said that the material with a smaller value has heating dimensional characteristics that are more likely to shrink sufficiently than the material with a larger value. If the absolute value of the difference in the values for two materials is small, it can be said that these two materials have similar heating dimensional characteristics. In each embodiment of the present disclosure, the contents of JIS K7133:1999 are incorporated by reference in their entirety.

[0041] The protective layer 24 is a layer that constitutes the surface of the mirror plate 21 that is exposed to the outside. The protective layer 24 is disposed closer to the viewing side than the optical function-imparting layer 23. The protective layer 24 protects the optical function-imparting layer 23. The thickness of the protective layer 24 is set to be sufficiently smaller than the thickness of the base material layer 22. Also, the thickness of the protective layer 24 may be approximately the same as the thickness of the optical function-imparting layer 23, or may be set to be larger than the thickness of the optical function-imparting layer 23.

[0042] The protective layer 24 may be formed by dipping or printing a hard coat liquid. Further, the protective layer 24 may be a film material or a sheet material laminated with a PMMA film, and may be disposed in a state of being attached to the optical function-imparting layer 23. When the protective layer 24 is formed using a film material or a sheet material, the protective layer 24 has heat dimensional change characteristics that are sufficiently easier to shrink than the base material layer 22.

[0043] The balancer layer 25a (25b) is disposed on the opposite side of the optical function-imparting layer 23 with the base material layer 22 interposed therebetween, that is, on the back side of the base material layer 22. The balancer layer 25a (25b) is a layer provided to take a stress balance with the opposite side of the balancer layer 25a (25b) with the base material layer 22 interposed therebetween, that is, the optical function-imparting layer 23 side.

[0044] The stress balance may be taken with the optical function-imparting layer 23 alone. The stress balance may be taken between the optical function-imparting layer 23 and the protective layer 24 regarded as an integral layer. That is, depending on the configuration such as the protective layer 24 other than the optical function-imparting layer 23, it should be considered whether or not to consider the residual stress of the protective layer 24 or the like. By taking the stress balance, it is also possible to reduce the thickness of the base material layer in design and lighten the mirror plate 21.

[0045] The balancer layer 25a (25b) is formed in the form of a film material or a sheet material having the same or similar heat dimensional change characteristics or residual stress characteristics as the optical function-imparting layer 23, and may be disposed in a state of being attached to the base material layer 22. That is, the thickness of the balancer layer 25a (25b) is set to be sufficiently smaller than the thickness of the base material layer 22. Further, the balancer layer 25a (25b) has heat dimensional change characteristics that are sufficiently easier to shrink than the base material layer 22. More specifically, the balancer layer 25a (25b) has heat dimensional change characteristics closer to the optical function-imparting layer 23 than the base material layer 22.

[0046] As shown in FIG. 6, in order to achieve stress balance, the same material as that of the optical function-imparting layer 23 may be employed for the balancer layer 25a. Then, the balancer layer 25a may be formed with substantially the same thickness as that of the optical function-imparting layer 23 by being given substantially the same rolling and stretching loads as those of the optical function-imparting layer 23 in order to reproduce the residual stress equivalent to that of the optical function-imparting layer 23. The balancer layer 25a may be set to have a thickness of, for example, 10 to 500 μm.

[0047] Also, as shown in FIG. 7, a material different from the material constituting the optical function-imparting layer 23 (for example, an inexpensive synthetic resin material having light transmissibility such as PMMA resin, PC resin, PET resin, etc.) may be employed for the balancer layer 25b. In this case, the balancer layer 25b may be formed with a thickness different from that of the optical function-imparting layer 23 in order to realize the residual stress equivalent to that of the optical function-imparting layer 23.

[0048] Specifically, if the balancer layer 25b and the optical function-imparting layer 23 have the same thickness, and if the optical function-imparting layer 23 has a greater residual stress, the thickness of the balancer layer 25b may be set to be greater than that of the optical function-imparting layer 23. If the balancer layer 25b and the optical function-imparting layer 23 have the same thickness, and if the balancer layer 25b has a greater residual stress, the thickness of the balancer layer 25b may be set to be smaller than that of the optical function-imparting layer 23.

[0049] As shown in FIG. 2, the rear unit 31 is disposed on the rear side of the mirror plate 21 at a distance from the mirror plate 21. The rear unit 31 is a unit that adds a function using light in the display device 10. One rear unit 31 may be provided, or a plurality of rear units 31 may be provided. As shown in FIG. 3, the rear unit 31 may be configured to include at least one of the driver monitor unit 32, the ambient lighting unit 36, and the real image display unit 38.

[0050] The driver monitoring unit 32 is used in a driver monitoring system that monitors the state of the driver DRV. The state of the driver DRV includes a drowsy state, a looking-elsewhere state, etc. As shown in detail in FIG. 8, the driver monitoring unit 32 is configured to include a camera 33, an illumination device 34, and a dedicated computer 35. The camera 33 is configured to image, for example, near-infrared light and photograph the driver DRV. The illumination device 34 is, for example, a near-infrared LED, and realizes appropriate exposure in camera photography by emitting light toward the driver DRV. The light emission may be constant light emission or light emission linked to the photographing timing. The dedicated computer 35 controls the illumination device 34, and also processes the image data photographed by the camera 33 to analyze the state of the driver DRV.

[0051] The dedicated computer 35 has at least one memory 35a and at least one processor 35b. The memory 35a is at least one type of non-transitory physical storage medium, such as a semiconductor memory, a magnetic medium, and an optical medium, that non-temporarily stores programs, data, etc. that can be read by the processor 35b. Further, as the memory 35a, a rewritable volatile storage medium such as a RAM (Random Access Memory) may be provided. The processor 35b includes at least one type, such as a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and a RISC (Reduced Instruction Set Computer)-CPU, as a core.

[0052] As shown in FIGS. 2 and 3, the ambient lighting unit 36 improves the visibility and appearance of the display device 10 by providing an illumination effect from the back side of the mirror plate 21. The ambient lighting unit 36 is configured to include a plurality of light sources 37. The light sources 37 are configured by LEDs, OLEDs, etc., and can emit light in a single color or a plurality of colors. The plurality of light sources 37 may be specified to switch between the on state and the off state simultaneously. The plurality of light sources 37 may be controllable to individually switch between the on state and the off state.

[0053] The real image display unit 38 is configured to include a display panel 39. The display panel 39 is, for example, an OLED display or a liquid crystal display, and is arranged in a posture with the display screen facing the driver's seat or the passenger seat. The real image display unit 38 can display content by real images in cooperation with or complementing each of the image display units 11a to e that display the virtual image VI described above. Further, the real image display unit 38 may include a mechanical indicator.

[0054] The control device 50 shown in FIG. 3 controls the virtual image display by each of the image display units 11a to e. The control device 50 may further control at least one of the illumination by the ambient lighting unit 36 and the real image display by the real image display unit 38 in the rear unit 31.

[0055] The control device 50 is configured to include an interface 52 and a dedicated computer 51. The interface 52 is configured to include at least one of a terminal and a communication device for communicating with an external control target by wired communication or wireless communication.

[0056] The dedicated computer 51 has at least one memory 51a and at least one processor 51b. The memory 51a is, for example, at least one type of non-transitory physical storage medium such as a semiconductor memory, a magnetic medium, and an optical medium that non-temporarily stores programs, data, etc. that can be read by the processor 51b. Further, as the memory 51a, a rewritable volatile storage medium such as a RAM (Random Access Memory) may be provided. The processor 51b includes at least one type, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and a RISC (Reduced Instruction Set Computer)-CPU as a core.

[0057] Note that the image display units 11a to 11e in the present embodiment correspond to the "display unit". Also, the real image display unit 38 may correspond to the "display unit". The mirror plate 21 corresponds to the "display optical component". The driver monitor unit 32 corresponds to the "monitor unit". The ambient lighting unit 36 corresponds to the "lighting unit".

[0058] (Function and effect) The function and effect of the first embodiment described above will be described again below.

[0059] According to the first embodiment, in the mirror plate 21 having a plurality of layers in a laminated state, on the opposite side of the optical function-imparting layer 23 with the base material layer 22 interposed therebetween, the balancer layer 25a (25b) is disposed. By the balancer layer 25a (25b), a stress balance with the optical function-imparting layer 23 side is achieved. Therefore, even if the optical function-imparting layer 23 has a heating dimensional change characteristic of being more likely to shrink than the base material layer 22, since the balance of the stress on both sides sandwiching the base material layer 22 during heating is obtained, the shape and structure of the mirror plate 21 are likely to be maintained. Accordingly, the quality required in display can be realized.

[0060] Also, according to the first embodiment, even if the mirror plate 21 has light transmissivity, since the balancer layer 25a (25b) only constitutes one of the plurality of layers, the deterioration of the appearance of the mirror plate 21 is suppressed.

[0061] Also, according to the first embodiment, the balancer layer 25b is formed of a material different from that of the optical function-imparting layer 23 and has a thickness different from that of the optical function-imparting layer 23. By comprehensively adjusting the material and the thickness, the stress balance can be easily achieved.

[0062] Also, according to the first embodiment, the optical function-imparting layer 23 forms a virtual image VI on the back side of the mirror plate 21 by imparting a reflection function of display light as an optical function. Thereby, a novel display can be realized.

[0063] (Second Embodiment) As shown in FIGS. 9 to 12, the second embodiment is a modification of the first embodiment. The second embodiment will be described centering on the points different from the first embodiment.

[0064] In the second embodiment, the plurality of layers further includes an additional adjustment layer 26. The additional adjustment layer 26 is a layer that locally adjusts the stress balance. The additional adjustment layer 26 is disposed on the opposite side of the base material layer 22 from the optical function-imparting layer 23 and the protective layer 24. The additional adjustment layer 26 is disposed on the back side of the balancer layer 25a and is laminated on a part of the region formed by the surface of the balancer layer 25a.

[0065] The additional adjustment layer 26 may be formed in the form of a film material or a sheet material having light transmissivity and may be disposed in a state of being attached to a part of the region of the balancer layer 25a. Thereby, on the side of the balancer layer 25a, the total thickness of the balancer layer 25a and the additional adjustment layer 26 in a part of the region becomes larger than the thickness of other regions. This part of the region may be, for example, a region corresponding to the central portion 21a (or the inner peripheral portion) of the mirror plate 21.

[0066] In such a manner, in the mirror plate 21 having a large area, even if there are different potential tendencies in the deformation due to thermal shrinkage between the central portion 21a and the end portion or between the inner peripheral portion and the outer peripheral portion of the optical function-imparting layer 23, the additional adjustment layer 26 realizes local adjustment. Therefore, the stress balance on both sides sandwiching the base material layer 22 can be balanced over the entire mirror plate 21.

[0067] (Third Embodiment) As shown in FIGS. 13 to 18, the third embodiment is a modification of the first embodiment. The third embodiment will be described centering on the points different from the first embodiment.

[0068] The balancer layer 25a of the third embodiment imparts a function different from that of the optical function-imparting layer 23 to the mirror plate 21. The function different from that of the optical function-imparting layer 23 may be an optical function or another function different from the optical function.

[0069] As an example of the function, a film material or a sheet material having wavelength-selective transmissivity is adopted for the balancer layer 25a. Thereby, the balancer layer 25a may impart a wavelength-selective transmission function of selectively transmitting wavelengths to the mirror plate 21.

[0070] The display device 10 may be configured to include both a balancer layer 25a having a property of transmitting the wavelength of near-infrared light and not transmitting visible light, and a driver monitor unit 32 as the rear unit 31. Then, while it becomes difficult for the driver DRV to visually recognize the driver monitor unit 32 and the appearance of the display device 10 is suppressed from deteriorating, the state of the driver DRV can be monitored by the driver monitor unit 32.

[0071] As another example of the function, a film material or a sheet material (for example, LCF, VCF) having viewing angle controllability or polarization may be adopted for the balancer layer 25a. And the display device 10 may be configured to include a plurality of real image display units 38 as the rear unit 31. In this configuration, the real image display by the real image display unit 38 can be selectively visualized and information can be presented to the driver's seat and the passenger seat.

[0072] For example, the content required for the driver DRV to drive is displayed on the real image display unit 38 arranged at the front position of the driver's seat, and the content related to entertainment is displayed on the real image display unit 38 arranged at the front position of the passenger seat. By the balancer layer 25a regulating the light transmitted in an oblique direction on the surface of the mirror plate 21, as shown in FIG. 13, from the driver's seat viewpoint PV1, the content necessary for driving can be visually recognized, while the content related to entertainment becomes difficult to be visually recognized. Also, as shown in FIG. 14, from the passenger seat viewpoint PV2, the content related to entertainment can be visually recognized, while the content necessary for driving becomes difficult to be visually recognized.

[0073] As another example of the function, by adopting a decorative film material or a sheet material having light transmissivity for the balancer layer 25a, the balancer layer 25a may impart a decorative function to the mirror plate 21. And the display device 10 may be configured to include an ambient lighting unit 36 as the rear unit 31. In this configuration, the atmosphere created by the display device 10 can be changed by switching the on / off of the illumination by the ambient lighting unit 36.

[0074] For example, as shown in FIG. 15, assume that the decorative film material has a wood grain pattern WGP. Here, as the first state, when the illumination of the ambient lighting unit 36 is in the on state, the wood grain pattern WGP appears to float on the mirror plate 21, and the high-class feeling of the instrument panel 2 can be produced. On the other hand, as the second state, when the illumination of the ambient lighting unit 36 is in the off state, the wood grain pattern WGP of the mirror plate 21 becomes difficult to visually recognize, and the visibility of the virtual image VI reflected and imaged on the mirror plate 21 can be enhanced.

[0075] The on state and the off state of the illumination may be controlled by the control device 50. For example, when an operation switch provided on the steering wheel or the like is operated by the driver DRV and a signal is input to the control device 50, the control device 50 may be configured to switch between the first state and the second state by turning the illumination on / off.

[0076] For example, the control device 50 may automatically switch between the on state and the off state of the lighting based on the driving state of the vehicle 1. More specifically, the control device 50 may acquire information regarding the current automated driving level of the vehicle 1 from the vehicle 1 and switch between the first state and the second state based on the information. The automated driving level is defined, for example, in SAE J3016. When the vehicle 1 is in a manual driving state (for example, a state corresponding to an automated driving level of 2 or less), it is preferable to turn off the lighting to enhance the visibility of the virtual image VI. When the vehicle 1 is in an automated driving state (for example, a state corresponding to an automated driving level of 3 or more), it is preferable to turn on the lighting.

[0077] As another example of the function, by adopting a display film material or a sheet material having light transmissibility for the balancer layer 25a, the balancer layer 25a may impart a display function to the mirror plate 21. And the display device 10 may be configured to include an ambient lighting unit 36 as the rear unit 31.

[0078] As shown in FIGS. 16 to 17, for example, a plurality of icon ICs 1 to 3 printed on a display film material are provided. And at positions directly behind each of the icon ICs 1 to 3, the light sources 37 of the ambient lighting unit 36 may be arranged so as to individually correspond to each of the icon ICs 1 to 3. And the control device 50 may individually switch between the on state and the off state of each light source 37 in conjunction with the state of the vehicle 1 to selectively display the plurality of icon ICs 1 to 3. Here, the state of the vehicle 1 referred to here is, for example, the presence or absence of an approaching overtaking vehicle, the inter-vehicle distance, the air cleanliness, the side-looking state of the driver DRV, the drowsy state of the driver DRV, etc. The icon IC1 is a warning light for an approaching overtaking vehicle. The icon IC2 is a fuel remaining amount warning light. The icon IC3 is a turn signal light.

[0079] Furthermore, as shown in FIG. 18, the icon IC4 is, for example, an 8-segment pattern for implementing numerical display of the own vehicle speed. By lighting the light sources 37 corresponding individually to each segment, characters such as numbers are displayed.

[0080] As another example of the function, a conductive film material, a sheet material, or a metal mesh having electromagnetic wave noise reduction performance is employed for the balancer layer 25a. Thereby, the balancer layer 25a may be provided with an electromagnetic wave noise reduction function for suppressing electromagnetic wave noise generated from, for example, the circuit board 12 provided in the rear unit 31 from leaking to the outside of the display device 10.

[0081] As another example of the function, a touch panel having light transmissivity and a film-like FPC (Flexible Printed Circuits) having an antenna function are employed for the balancer layer 25a. Thereby, the balancer layer 25a may be provided with a touch panel function for the mirror plate 21. Thereby, the display device 10 can receive touch operations related to the content displayed by the display device 10, such as car navigation, entertainment, audio, GPS, etc.

[0082] As another example of the function, a moth-eye film material or a sheet material having reflection reduction properties and an AR film material or a sheet material are employed for the balancer layer 25a. Thereby, the balancer layer 25a may be provided with a function for suppressing a deterioration in appearance due to external light for the mirror plate 21.

[0083] Furthermore, the balancer layer 25a may be formed by laminating the above-described film material or sheet material to provide the mirror plate 21 with a plurality of functions.

[0084] Furthermore, the balancer layer 25a may have a configuration in which the region formed by the surface of the balancer layer 25a is divided into a plurality of divided regions, and different film materials or sheet materials are tiled for each of the divided regions. Thereby, it may be configured to provide different functions for the mirror plate 21 for each divided region.

[0085] (Other embodiments) Although a plurality of embodiments have been described above, the present disclosure is not construed as being limited to those embodiments, and can be applied to various embodiments and combinations without departing from the gist of the present disclosure.

[0086] Specifically, as Modification Example 1, a plurality of mirror plates 21 may be provided so as to individually correspond to each of the image display units 11a to 11c.

[0087] As Modification Example 2, there may be one image display unit.

[0088] As Modification Example 3, various shapes can be adopted for the mirror plate 21. The mirror plate 21 may be formed in a flat plate shape. The mirror plate 21 may be formed in a curved plate shape having a curved surface such as a toroidal curved surface or a free-form surface on its surface.

[0089] As Modification Example 4, the mirror plate 21 may have light-shielding properties for light of all wavelengths of near-infrared light and visible light.

[0090] As Modification Example 5, the optical function imparted by the optical function-imparting layer 23 to the display optical component may be a function other than the reflection function. The various optical functions shown as the functions of the balancer layer 25a in the third embodiment may be imparted by the optical function-imparting layer 23 to the display optical component.

[0091] As Modification Example 6, for the optical function-imparting layer 23, a material that can be insert-molded in a thin shape, such as metal, glass, inorganic material, organic material, synthetic resin material, or a composite material thereof, may be used. The optical function-imparting layer 23 may further have a configuration in which painting, coating, etc. are applied to the surface or the interface with another layer.

[0092] As Modification Example 7, the display optical component may be a vehicle windshield that reflects display light emitted from the head-up display device. The display optical component may be a combiner that reflects display light emitted from the head-up display device. The display optical component may be a decoration plate (trim plate) provided in an in-vehicle display device.

[0093] As a modification example 8, the display optical component and the display device including the same may not be used in the vehicle 1, and may be used in consumer products such as televisions and smartphones, or in digital signage.

[0094] The control unit and the method described in the present disclosure may be realized by a dedicated computer configured with a processor programmed to execute one or more functions embodied by a computer program. Alternatively, the device and the method described in the present disclosure may be realized by a dedicated hardware logic circuit. Or, the device and the method described in the present disclosure may be realized by one or more dedicated computers configured by a combination of a processor that executes a computer program and one or more hardware logic circuits. Further, the computer program may be stored in a computer-readable non-transitory tangible recording medium as instructions to be executed by a computer.

[0095] (Disclosure of Technical Ideas) This specification discloses a plurality of technical ideas described in a plurality of items listed below. Some items may be described in a multiple dependent form in which a preceding item is alternatively cited in a subsequent item. The items described in these multiple dependent forms define a plurality of technical ideas.

[0096] <Technical Idea 1> A display device configured to perform display toward the viewing side, a plurality of display units (11a to 11e) that emit display light, a component provided for each of the plurality of display units and arranged to direct the display light from each display unit toward the viewing side, the component being a display optical component (21) including a plurality of layers in a laminated state, the plurality of layers include a base material layer (22), An optical function - imparting layer (23) having a heating dimensional change characteristic that is more likely to shrink than the base material layer, and imparting an optical function to the display optical component; A balancer layer (25a, 25b) that is disposed on the opposite side of the base material layer with respect to the optical function - imparting layer, and has a heating dimensional change characteristic closer to the optical function - imparting layer than the base material layer so as to achieve stress balance with the optical function - imparting layer side. The display device has these layers.

[0097] <Technical Idea 2> The display optical component has light - transmissivity. The display device according to Technical Idea 1.

[0098] <Technical Idea 3> The balancer layer is formed of a material different from that of the optical function - imparting layer and has a thickness different from that of the optical function - imparting layer. The display device according to Technical Idea 1 or 2.

[0099] <Technical Idea 4> The plurality of layers are laminated on a part of the region formed by the surface of the balancer layer, and further have an additional adjustment layer (26) for locally adjusting the stress balance. The display device according to any one of Technical Ideas 1 to 3.

[0100] <Technical Idea 5> The balancer layer imparts a function different from that of the optical function - imparting layer to the display optical component. The display device according to any one of Technical Ideas 1 to 4.

[0101] <Technical Idea 6> The optical function - imparting layer imparts a reflection function of the display light as the optical function, and forms a virtual image (VI) on the back side, which is the opposite side of the display optical component with respect to the viewing side. The display device according to any one of Technical Ideas 1 to 5.

[0102] <Technical Idea 7> Further provided with a monitor unit (32) that is disposed on the back side, which is the opposite side of the display optical component with respect to the viewing side, and monitors the viewing side. The monitor unit includes a camera (33) that images light of a predetermined wavelength and captures an image of the viewing side, and an illumination device (34) that emits light of the predetermined wavelength toward the viewing side and realizes appropriate exposure in imaging, and has the balancer layer having wavelength selective transmissivity that selectively transmits light of the predetermined wavelength used for the camera and the illumination device, the display device according to any one of Technical Ideas 1 to 6.

[0103] <Technical Idea 8> mounted on a vehicle (1) in which a plurality of seats are arranged, further including a rear unit (38) that is disposed on the rear side, which is the opposite side of the viewing side with the display optical component interposed therebetween, and performs display from the rear side, and is different from the display unit, the display optical component having light transmissivity, wherein the optical function imparting layer imparts a reflection function of the display light by the display unit as the optical function, thereby forming a virtual image (VI) visible from a plurality of seats on the rear side, while the balancer layer has a viewing angle controllability or a polarization property, so that the display by the rear unit is selectively visualized for some of the predetermined seats, the display device according to any one of Technical Ideas 1 to 7.

[0104] <Technical Idea 9> further including an illumination unit (36) that is disposed on the rear side, which is the opposite side of the viewing side with the display optical component interposed therebetween, and provides an illumination effect from the rear side, the display optical component having light transmissivity, wherein the balancer layer has a decorative pattern (WGP), and is configured to be switchable between a first state in which the decorative pattern is difficult to view from the viewing side when the illumination unit is on and a second state in which the decorative pattern is visible from the viewing side when the illumination unit is off, the display device according to any one of Technical Ideas 1 to 8.

[0105] <Technical Idea 10> An optical component for display used for display, comprising a plurality of layers in a laminated state, wherein the plurality of layers include a base material layer (22), an optical function-imparting layer (23) having a heating dimensional change characteristic that is more likely to shrink than the base material layer and imparting an optical function, and a balancer layer (25a, 25b) disposed on the opposite side of the base material layer from the optical function-imparting layer and having a heating dimensional change characteristic closer to the optical function-imparting layer than the base material layer so as to achieve stress balance with the optical function-imparting layer side.

[0106] <Technical Idea 11> The plurality of layers have light transmissibility in a laminated state, and the optical component for display according to Technical Idea 10.

Explanation of Reference Numerals

[0107] 10: Display device, 11a~e: Image display unit (display unit), 21: Mirror plate (optical component for display), 22: Base material layer, 23: Optical function-imparting layer, 25a, 25b: Balancer layer

Claims

1. A display device configured to perform display toward a visible side, comprising: a plurality of display units (11a to e) that emit display light; a component provided for each of the plurality of display units and arranged to direct the display light from each display unit toward the visible side, the component being a display optical component (21) including a plurality of layers in a laminated state; the plurality of layers include: a base material layer (22); an optical function-imparting layer (23) having a heating dimensional change characteristic that is more likely to shrink than the base material layer and imparting an optical function to the display optical component; a balancer layer (25a, 25b) disposed on the opposite side of the base material layer from the optical function-imparting layer and having a heating dimensional change characteristic closer to the optical function-imparting layer than the base material layer so as to achieve stress balance with the optical function-imparting layer side; and an additional adjustment layer (26) laminated on a part of the region formed by the surface of the balancer layer for locally adjusting the stress balance.

2. The display device according to claim 1, wherein the display optical component has light transmissibility.

3. The display device according to claim 1 or 2, wherein the balancer layer is formed of a material different from that of the optical function-imparting layer and has a thickness different from that of the optical function-imparting layer.

4. The display device according to claim 1 or 2, wherein the balancer layer imparts a function different from that of the optical function-imparting layer to the display optical component.

5. The display device according to claim 1 or 2, wherein the optical function-imparting layer imparts a reflection function of the display light as the optical function, thereby forming a virtual image (VI) on the back side, which is the opposite side of the display optical component with respect to the visible side, across the display optical component.

6. The monitoring side is disposed on the back side, which is the opposite side across the display optical component, and further includes a monitoring unit (32) for monitoring the viewing side. The monitoring unit includes: a camera (33) that forms an image of light of a predetermined wavelength and captures the viewing side; and an illumination device (34) that emits light of the predetermined wavelength toward the viewing side and realizes appropriate exposure in imaging. The display device according to claim 1, wherein the balancer layer has wavelength selective transmissivity for selectively transmitting the light of the predetermined wavelength used for the camera and the illumination device.

7. mounted on a vehicle (1) in which a plurality of seats are arranged, further includes a rear unit (38) that is disposed on the back side, which is the opposite side across the display optical component, and performs display from the back side, different from the display unit. The display optical component has light transmissivity. By imparting the reflection function of the display light by the display unit as the optical function, the optical function imparting layer forms a virtual image (VI) visible from a plurality of seats on the back side. On the other hand, since the balancer layer has a viewing angle controllability or a polarization property, the display by the rear unit is selectively visualized for some of the predetermined seats. The display device according to claim 1.

8. A display device mounted on a vehicle (1) in which a plurality of seats are arranged and configured to perform display toward the viewing side, including a plurality of display units (11a to e) that emit display light; a component provided for each of the plurality of display units and arranged to direct the display light from each display unit toward the viewing side, and being a display optical component (21) including a plurality of layers in a stacked state; a rear unit (38) that is disposed on the back side, which is the opposite side across the display optical component, and performs display from the back side, different from the display unit; The plurality of layers include: a base material layer (22); having a heating dimensional change characteristic that is more likely to shrink than the base material layer, and an optical function imparting layer (23) that imparts an optical function to the display optical component, disposed on the opposite side of the base material layer across the optical function imparting layer, and having a heating dimensional change characteristic closer to the optical function imparting layer than the base material layer so as to achieve stress balance with the optical function imparting layer side, a balancer layer (25a, 25b), and the display optical component has light transmissibility, By imparting the reflection function of the display light by the display unit as the optical function, the optical function imparting layer forms a virtual image (VI) visible from a plurality of seats on the back side, while the balancer layer has viewing angle controllability or polarization, so that the display by the back unit is selectively visualized for some of the predetermined seats. A display device.

9. Further provided with an illumination unit (36) disposed on the back side, which is the opposite side across the display optical component from the viewing side, and providing an illumination effect from the back side, the display optical component has light transmissibility, Since the balancer layer has a decorative pattern (WGP), a first state in which the decorative pattern is difficult to view from the viewing side when the illumination unit is on and a second state in which the decorative pattern is visible from the viewing side when the illumination unit is off are provided. The display device according to claim 1, which is configured to be switchable.

10. A display device configured to perform display toward the viewing side, a plurality of display units (11a to e) that emit display light, provided for each of the plurality of display units, and a component disposed so as to direct the display light from each display unit toward the viewing side, and a display optical component (21) including a plurality of layers in a stacked state, provided with an illumination unit (36) disposed on the back side, which is the opposite side across the display optical component from the viewing side, and providing an illumination effect from the back side, the plurality of layers are A base material layer (22), An optical function-imparting layer (23) having a heating dimensional change characteristic that is more likely to shrink than the base material layer and imparting an optical function to the display optical component, A balancer layer (25a, 25b) disposed on the opposite side of the base material layer from the optical function-imparting layer and having a heating dimensional change characteristic closer to the optical function-imparting layer than the base material layer so as to achieve stress balance with the optical function-imparting layer side, The display optical component has light transmissibility, The display device is configured to be switchable between a first state in which the decorative pattern is difficult to visually recognize from the viewing side when the lighting unit is in an on state and a second state in which the decorative pattern is visually recognizable from the viewing side when the lighting unit is in an off state because the balancer layer has a decorative pattern (WGP).

11. A display optical component used for display, Comprising a plurality of layers in a laminated state, The plurality of layers are, A base material layer (22), An optical function-imparting layer (23) having a heating dimensional change characteristic that is more likely to shrink than the base material layer and imparting an optical function, A balancer layer (25a, 25b) disposed on the opposite side of the base material layer from the optical function-imparting layer and having a heating dimensional change characteristic closer to the optical function-imparting layer than the base material layer so as to achieve stress balance with the optical function-imparting layer side, An additional adjustment layer (26) laminated on a part of the region formed by the surface of the balancer layer and locally adjusting the stress balance,

12. The display optical component according to claim 11, wherein the plurality of layers have light transmissibility in a laminated state.

Images