JP5353606B2 - Protection plate integrated display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress an increase in the thickness of an entire device while suppressing an impact on a display panel. <P>SOLUTION: A protective plate integrated display device includes: a display panel, a protective plate disposed on the observation side of the display panel in a state that a first fixing member is interposed between the display panel and the protective plate; a surface light source disposed on the side opposite to the observation side of the display panel so as to face the display region of the display panel; a casing which includes a bottom disposed on the side opposite to the side wherein the protective plate is disposed, of the display panel and the surface light source, and an outer wall portion erected from the outer peripheral edge part of the bottom toward the protective plate and fixed to the protective plate via a second fixing member, in a state of holding the display panel and the surface light source between the casing and the protective plate; and a buffer member which is disposed to surround the periphery of the surface light source in a state of being not interposed between the bottom of the casing and the surface light source but being interposed between the bottom of the casing and the display panel and includes a base portion which is interposed between the outer peripheral edge part of a surface on the side opposite to the observation side of the display panel and the bottom of the casing to press the display panel toward the protective plate by elastic repulsive force. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a protective plate integrated display device.

  Conventionally, as a protective plate integrated display device, for example, a housing having an opening, a protective plate disposed in the opening and attached to the housing with an adhesive or a double-sided tape, and the display surface overlap the protective plate. And a liquid crystal display panel disposed inside the housing, and is mounted on an electronic device such as a portable device (see, for example, Patent Document 1). Then, the shock to the liquid crystal display panel is suppressed by interposing a cushioning material such as urethane foam between the display panel and the casing.

JP 2008-90053 A

In the above protective plate integrated display device, since the cushioning material is interposed between the surface light source disposed on the side opposite to the viewing side of the display panel and the housing, the thickness of the entire device is inevitably increased. Will increase.
The subject of this invention is suppressing the increase in the thickness of the whole apparatus, suppressing the impact with respect to a display panel.

In order to solve the above problems, according to one aspect of the present invention,
A display panel;
A protective plate arranged with a first fixing member interposed on the observation side of the display panel;
A surface light source arranged to face the display area of the display panel on the side opposite to the viewing side of the display panel;
In a state where the display panel and the surface light source are sandwiched between the protection plate and the display panel and the surface light source, a bottom portion disposed on the side opposite to the side where the protection plate is disposed, A housing having an outer wall portion standing from the outer peripheral edge portion of the bottom portion toward the protection plate and fixed to the protection plate via a second fixing member;
Arranged around the surface light source in a state where it is not interposed between the bottom portion of the housing and the surface light source and is interposed between the bottom portion of the housing and the display panel, A buffer member having a base portion interposed between an outer peripheral edge portion of the surface opposite to the observation side of the display panel and the bottom portion of the housing and pressing the display panel toward the protection plate by elastic repulsion. and, with a,
The outer wall portion of the housing has a frame shape formed so as to surround the entire circumference of the display panel and the surface light source,
The protective plate-integrated display device is provided in which the outer wall portion and the protective plate are fixed via the frame-shaped second fixing member .

In the protection plate integrated display device, preferably, the outer wall portion of the housing has a frame shape formed so as to surround the entire periphery of the display panel and the surface light source,
The outer wall portion and the protection plate are fixed via the frame-shaped second fixing member.
In the above-described protective plate integrated display device, preferably, the outer wall portion has a bent portion at the tip thereof so as to extend outward along the protective plate,
A surface of the bent portion facing the protection plate is fixed to the protection plate via the second fixing member.
In the protection plate integrated display device, preferably, the buffer member has an extending portion extending from the base portion toward the protection plate in a state of surrounding at least a part of the display panel.
The display panel is not interposed between the extension portion and the protective plate.
In the protection plate integrated display device, preferably, a surface of the extension portion of the buffer member facing the protection plate is in contact with the protection plate, and the extension portion is opposed to the housing. The surface is in contact with the casing, and the protection plate and the casing are pressed by the elastic restoring force of the extension portion of the buffer member.
In the protection plate integrated display device, preferably, the display unit is disposed outside the display region between the display panel and the surface light source, and extends from a region overlapping the surface light source to a region overlapping the base of the buffer member. It has the light-shielding member arrange | positioned continuously.
In the protection plate integrated display device, it is preferable that the light shielding member is fixed to a base portion of the buffer member and the surface light source.
In the protection plate integrated display device, preferably, the surface light source includes a prism sheet disposed on an observation surface side so as to face a display area of the display panel, Among them, at least the entire display area of the display panel is fixed to the housing in a state of being separated from the display panel.

  ADVANTAGE OF THE INVENTION According to this invention, the protective plate integrated display apparatus which can suppress the increase in the thickness of the whole apparatus can be provided, suppressing the impact with respect to a display panel.

It is a disassembled perspective view which shows schematic structure of the protective plate integrated display apparatus of this embodiment. It is sectional drawing which showed typically the cross-sectional structure along the II-II cutting line of FIG. It is a disassembled perspective view which shows the modification of the protection plate integrated display apparatus of FIG. FIG. 4 is an explanatory diagram illustrating an example of a housing in the protection plate integrated display device of FIG. 3, in which FIG. 3A illustrates the housing of the first form, and FIG. It is a fragmentary sectional view which shows the cross-sectional structure along -IV cutting line.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

  FIG. 1 is an exploded perspective view showing a schematic configuration of a protective plate integrated display device of the present embodiment, and FIG. 2 is a cross-sectional view schematically showing a cross-sectional configuration along a II-II cutting line of FIG. . As shown in FIGS. 1 and 2, the protection plate integrated display device 1 includes a liquid crystal display panel 2, a protection plate 3, a surface light source 4, a light shielding member 5, a housing 6, and a buffer member 7. I have.

  The liquid crystal display panel 2 is a display panel, and is sealed in a pair of transparent substrates 23 and 24 opposite to each other, which are arranged to face each other with a predetermined gap therebetween, and between the transparent substrates 23 and 24. A plurality of pixels provided on the mutually facing inner surfaces of the liquid crystal layer (not shown) and the pair of transparent substrates 23 and 24, respectively, and controlling the transmission of light by changing the alignment state of the liquid crystal molecules of the liquid crystal layer by applying a voltage. First and second transparent electrodes (not shown), polarizing plate 25 affixed on the outer surface of transparent substrate 23 on the observation side (front side), and transparent substrate on the opposite side (back side) And a polarizing plate 26 attached to the outer surface of 24.

  The liquid crystal display panel 2 is an active matrix liquid crystal element using TFTs (thin film transistors) as active elements. Although not shown in the drawing, the inner surface of one transparent substrate (for example, the transparent substrate 24 on the back side) of the pair of transparent substrates 23 and 24 is arranged in a matrix in the row and column directions. A plurality of pixel electrodes, a plurality of TFTs (switching elements) arranged corresponding to the plurality of pixel electrodes and connected to the corresponding pixel electrodes, and a plurality of scans for supplying gate signals respectively to the plurality of TFTs in each row Lines and a plurality of signal lines for supplying data signals to the plurality of TFTs in each column are provided. On the other hand, on the inner surface of the other transparent substrate (for example, the transparent substrate 23 on the observation side), a counter electrode formed to face the entire array region of the plurality of pixel electrodes, and the plurality of pixel electrodes and the counter electrode face each other. There are provided color filters of three colors, red, green, and blue, which are formed so as to correspond to a plurality of pixels each consisting of a region.

  The liquid crystal display panel 2 is a TN type or STN type liquid crystal display panel in which liquid crystal molecules are twisted between a pair of transparent substrates 23 and 24, and the liquid crystal molecules are aligned substantially perpendicular to the transparent substrates 23 and 24. Vertically aligned liquid crystal display panel, non-twisted horizontal alignment liquid crystal display panel in which liquid crystal molecules are aligned in one direction and aligned substantially parallel to the inner surfaces of the transparent substrates 23 and 24, and bend aligns the liquid crystal molecules Any of an alignment type liquid crystal display panel and the like, and a ferroelectric or antiferroelectric liquid crystal display panel may be used.

  Further, as shown in FIG. 1, an extended portion 24 a is formed at one end of the transparent substrate 24 on the back surface side so as to project outward from the transparent substrate 23 on the observation side. A driving circuit 27 for driving the TFT by sequentially applying gate signals to the plurality of scanning lines and applying data signals to the plurality of signal lines is mounted on the observation side surface of the projecting portion 24a. . Further, a wiring film 28 for supplying a driver control signal from an external circuit (not shown) to the drive circuit 27 is connected to the end of the overhanging portion 24a.

  The protective plate 3 has a substantially rectangular shape as shown in FIGS. 1 and 2 and is formed of tempered glass or a high-strength transparent resin plate (PMMA plate, PC plate, etc.). The protective plate 3 covers the entire observation side of the liquid crystal display panel 2 and protrudes outward along the surface direction from the liquid crystal display panel 2 over the entire circumference. Hereinafter, this protruding portion is referred to as a protruding portion 31.

  Further, between the protective plate 3 and the polarizing plate 25 on the observation side of the liquid crystal display panel 2, a first fixing member 8 that contacts the protective plate 3 and the polarizing plate 25 and fixes them is interposed. The first fixing member 8 is disposed so as to cover the display area G of the liquid crystal display panel 2 from the observation side. The first fixing member 8 is a flexible resin member, and is formed of, for example, a resin sheet or an ultraviolet curable resin.

  The surface light source 4 is disposed on the side opposite to the viewing side of the liquid crystal display panel 2 so as to face the display region G of the liquid crystal display panel 2. The surface light source 4 includes a wiring board 41, a light source 42, a light guide plate 43, a plurality of optical sheets 44, 45, 46, and a reflection sheet 47.

  A plurality of light sources 42 and a light guide plate 43 are installed on the wiring board 41. The wiring board 41 is provided with a wiring film 411 for connecting an external lighting circuit (not shown) and the plurality of light sources 42.

  The light source 42 is formed from a plurality of optical elements such as LEDs. The light sources 42 are arranged on the back surface of the wiring board 41 along one side of the light guide plate 43.

  The light guide plate 43 is formed in a rectangular shape when viewed from the front by a plate-like transparent member, and a concave portion 431 for accommodating the light source 42 is formed on one side thereof. Of the two plate surfaces of the light guide plate 43, one plate surface is the emission surface 432, and the other plate surface is the reflection surface 433. The light guide plate 43 is disposed such that the emission surface 432 faces the observation side. One side of the light guide plate 43 is attached to the back surface of the wiring board 41. Accordingly, the side surface of one side of the light guide plate 43 becomes the incident end surface 434 and is disposed in front of the light irradiation direction of the light source 42. The light emitted from the light source 42 enters the light guide plate 43 through the incident end surface 434, and is reflected from the reflection surface 433 to be emitted from the emission surface 432. The transparent substrate 24 is irradiated.

  The plurality of optical sheets 44, 45, 46 are formed in a rectangular shape when viewed from the front, and are stacked on the emission surface 432 of the light guide plate 43. Here, the optical sheet 44 immediately above the emission surface 432 is a diffusion sheet that diffuses the emitted light from the emission surface 432. The optical sheet 44 is a transparent adhesive layer in which light scattering particles are dispersed or a transparent resin film in which light scattering particles are dispersed.

  The two optical sheets 45 and 46 arranged on the observation side of the optical sheet 44 are prism sheets. One surface of the prism sheet is formed as a flat surface, and many fine linear prisms are formed on the other surface. In the two optical sheets 45 and 46, each flat surface is arrange | positioned so that it may face the light-guide plate 43 side. The linear prisms of the two optical sheets are arranged along different directions orthogonal to each other.

  The reflection sheet 47 is formed in a rectangular shape in front view with a sheet-like metal member such as an aluminum sheet so as to be larger than the outer shape of the light guide plate 43. The reflection sheet 47 is disposed on the back side of the light guide plate 43, reflects the leaked light from the reflection surface 433 of the light guide plate 43, and returns the light into the light guide plate 43.

  The light shielding member 5 has an adhesive layer (not shown) only on one side facing the surface light source 4 and has no adhesive layer formed on the other side facing the liquid crystal display panel 2. It is. The light shielding member 5 has an opening 51 and is formed in a rectangular frame shape when viewed from the front. The light shielding member 5 is interposed between the liquid crystal display panel 2 and the surface light source 4 in contact with the liquid crystal display panel 2 and the surface light source 4 to block the gap between the buffer member 7 and the surface light source 4. To do. The light shielding member 5 is larger than the plurality of optical sheets 46 and has an outer shape smaller than the polarizing plate 26 on the back surface side of the liquid crystal display panel 2. Further, the opening 51 of the light shielding member 5 is formed larger than the display area G of the liquid crystal display panel 2. The light blocking member 5 is arranged so that the display area G is accommodated in the opening 51. One side of the light shielding member 5 having the adhesive layer is adhered to the uppermost optical sheet 46 disposed closest to the liquid crystal display panel 2. That is, a gap is formed between the uppermost optical sheet 46 and the liquid crystal display panel 2 by the light shielding member 5.

  The housing 6 covers the liquid crystal display panel 2 and the surface light source 4 from the back side, and is formed by drawing a metal plate such as an aluminum plate, for example. The housing 6 has a bottom portion 61 and an outer wall portion 62 erected from the outer peripheral edge portion of the bottom portion 61.

The bottom portion 61 is formed in a rectangular shape when viewed from the front, and the protection plate 3 is attached to the liquid crystal display panel 2 and the surface light source 4 with the liquid crystal display panel 2 and the surface light source 4 sandwiched between the protection plate 3. It is arranged on the side opposite to the arranged side.
The outer wall 62 has a rectangular frame shape when viewed from the front, and is erected from the outer peripheral edge of the bottom 61 toward the protection plate 3 so as to surround the entire periphery of the liquid crystal display panel 2 and the surface light source 4. And the front-end | tip part of the outer wall part 62 becomes the bending part 621 bent so that it might extend outside along the protrusion part 31 of the protection board 3 except the area | region where the wiring films 28 and 411 are wired. Yes. The surface on the observation side in the bent portion 621 is a facing surface 622 that faces the back surface of the protruding portion 31 of the protection plate 3. An adhesive 63 as a second fixing member is applied to the opposing surface 622 over the entire length, and the opposing surface 622 and the back surface of the protruding portion 31 of the protection plate 3 are fixed via the adhesive 63. Has been.

  The buffer member 7 is for reducing the impact on the liquid crystal display panel 2 and is accommodated in the housing 6. The buffer member 7 is formed of an elastic resin such as rubber or foamable resin, for example, and includes a base portion 71 having a rectangular frame shape in front view, and an extension portion 72 extending from the base portion 71 toward the protection plate 3. have.

The base 71 is disposed so as to surround the surface light source 4 without being interposed between the bottom 61 of the housing 6 and the surface light source 4 and being interposed between the bottom 61 and at least the liquid crystal display panel 2. ing.
Since the thickness of the base 71 is slightly larger than the thickness of the surface light source 4, the inner peripheral edge of the base 71 is opposite to the observation side of the light shielding member 5 in a state where the protection plate integrated display device 1 is completed. The base 71 presses the liquid crystal display panel 2 toward the protective plate 3 by elastic repulsion force through the light shielding member 5 through contact with the outer peripheral edge of the surface and the bottom 61 of the housing 6. Further, since the distance between two opposing sides of the outer shape of the base portion 71 is slightly larger than the distance between the two pairs of outer wall portions 62, the outer peripheral edge portion of the base portion 71 covers the entire circumference. The base 71 abuts against the outer wall 62 of the body 6 and presses the outer wall 62 of the housing 6 outward.

  The inner peripheral edge of the light shielding member 5 is bonded and fixed to the observation side surface of the uppermost optical sheet 46 of the surface light source 4, and the outer peripheral edge of the light shielding member 5 is bonded and fixed to the observation side surface of the base 71. Has been. The light shielding member 5 is continuously arranged from a region overlapping the surface light source 4 to a region overlapping the base 71.

  The extending portion 72 extends from the observation surface side of the outer peripheral edge portion of the base portion 71 toward the protective plate 3 so as to surround the periphery of the liquid crystal display panel 2 except for the region where the wiring films 28 and 411 are routed. ing. The opposing surface 721 of the extension portion 72 facing the protection plate 3 is in contact with the back surface of the protection plate 3 so that the liquid crystal display panel 2 is not interposed between the extension portion 72 and the protection plate 3. Further, the distance between the two pairs of opposing sides of the outer shape of the extension part 72 is slightly larger than the distance between the two pairs of outer wall parts 62, respectively. The facing surface 722 facing the outer wall portion 62 abuts on the outer wall portion 62, and the extending portion 72 presses the protective plate 3 and the housing 6 outward by an elastic restoring force.

As described above, according to the protection plate integrated display device 1 of the present embodiment, the base 71 of the buffer member 7 made of an elastic body is provided on the surface of the light shielding member 5 on the side opposite to the observation side of the liquid crystal display panel 2. Since it is in contact with the outer peripheral edge portion and the bottom portion 61 and is interposed between the liquid crystal display panel 2 and the bottom portion 61, an impact from the back surface side to the protection plate integrated display device 1 is prevented from being affected by the base portion 71 of the buffer member 7. Can be relaxed by the elastic force. Since the stress due to the impact is thus reduced, the impact on the liquid crystal display panel 2 can be suppressed.
The base 71 of the buffer member 7 is not interposed between the bottom 61 of the housing 6 and the surface light source 4 and is interposed between the bottom 61 and the liquid crystal display panel 2 and around the surface light source 4. Therefore, an increase in the thickness of the entire apparatus can be suppressed.
Therefore, it is possible to provide the protection plate integrated display device 1 that can suppress an increase in the thickness of the entire device while suppressing an impact on the liquid crystal display panel 2.

  Further, since the bent portion 621 extends outward along the protruding portion 31 of the protective plate 3, the area of the facing surface 622 can be increased, and the bonding area between the protective plate 3 and the housing 6 can be increased. Can be secured. Thereby, the protection board 3 can be reinforced more firmly.

In addition, since the extension part 72 of the buffer member 7 surrounds at least a part of the periphery of the liquid crystal display panel 2 and the liquid crystal display panel 2 is not interposed between the extension part 72 and the protective plate 3, It is possible to prevent the impact from the lateral direction from being directly transmitted to the liquid crystal display panel 2.
Furthermore, the opposing surface 721 of the buffer member 7 that faces the protective plate 3 contacts the protective plate 3, and the opposing surface 722 of the extended portion 72 that faces the housing 6 contacts the housing 6. Since the protective plate 3 and the housing 6 are pressed by the elastic restoring force of the extending portion 72, the shock to the protective plate 3 and the impact from the lateral direction to the housing 6 can be further reduced by the buffer member 7. It becomes possible.

Further, the light shielding member 5 is disposed outside the display region G between the liquid crystal display panel 2 and the surface light source 4 and is continuously disposed from a region overlapping the surface light source 4 to a region overlapping the base 71 of the buffer member 7. Therefore, the light shielding member 5 can prevent light from leaking out between the buffer member 7 and the surface light source 4.
Since the light shielding member 5 is bonded and fixed to the base 71 and the surface light source 4 of the buffer member 7, both can be fixed without providing a dedicated member for fixing the base 71 and the surface light source 4. Become.
In particular, in this embodiment, an adhesive layer is formed only on one side of the light shielding member 5 facing the surface light source 4, and an adhesive layer is formed on the other side of the light shielding member 5 facing the liquid crystal display panel 2. Therefore, the light shielding member 5 is not bonded to the liquid crystal display panel 2. That is, at the time of repair, the process of removing the light shielding member 5 is made more efficient than when the adhesive layers are formed on both sides.

  Further, since the surface on the observation side of the surface light source 4, that is, the entire optical sheet 46 that is a prism sheet is fixed to the housing 6 in a state of being separated from the liquid crystal display panel 2, the deformation of the prism sheet due to the pressing force is prevented. can do. Thereby, the directivity of light by the prism sheet can be made accurate.

  Note that the present invention is not limited to the above embodiment, and can be modified as appropriate. In the following description, the same parts as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted.

  For example, in the above-described embodiment, the case where the bent portion 621 of the housing 6 is formed except for the region where the wiring films 28 and 411 are routed is described. However, the bent portion is formed over the entire circumference. It is also possible to do. More specifically, in the case 6a of the protection plate integrated display device 1A shown in FIG. 3, the front end portion of the outer wall portion 62 of the bottom portion 61 extends outward along the protruding portion 31 of the protection plate 3 over the entire circumference. The bent portion 621a is bent so as to come out. An adhesive 63a as a second fixing member is applied over the entire surface of the opposing surface 622a of the bent portion 621a, and the opposing surface 622a and the back surface of the projecting portion 31 of the protective plate 3 via the adhesive 63a. And are fixed.

  Thereby, since the outer wall part 62a of the housing | casing 6 and the protective plate 3 are being fixed over the perimeter via the frame-shaped adhesive agent 63a, the whole rigidity of the protective plate integrated display apparatus 1A is improved. be able to.

  In this case, it is necessary to pull out the wiring films 28 and 411 to the outside of the housing 6a. Specifically, for example, an opening 64a for pulling out the wiring films 28 and 411 is formed in the outer wall 62a of the housing 6a as shown in FIG. 4A, or the wiring film as shown in FIG. 4B. An opening 64b for drawing out 28 and 411 is formed in the bottom 61b of the housing 6b.

  Moreover, in the said embodiment, although the case where the 2nd fixing member was formed of the adhesives 63 and 63a was illustrated and demonstrated, the 2nd fixing member may be a double-sided tape etc.

1. Protection plate integrated display device 2. Liquid crystal display panel (display panel)
DESCRIPTION OF SYMBOLS 3 Protection plate 4 Surface light source 5 Light-shielding member 6 Case 7 Buffer member 8 First fixing member 31 Protrusion part 41 Wiring board 42 Light source 43 Light guide plate 44 Optical sheet 45, 46 Optical sheet (prism sheet)
47 Reflective sheet 51 Opening 61 Bottom 62 Outer wall 63 Adhesive (second fixing member)
71 Base 72 Extension portion 621 Bending portion 622 Opposing surface 721 Facing surface 722 Facing surface G Display area

Claims (7)

A display panel;
A protective plate arranged with a first fixing member interposed on the observation side of the display panel;
A surface light source arranged to face the display area of the display panel on the side opposite to the viewing side of the display panel;
In a state where the display panel and the surface light source are sandwiched between the protection plate and the display panel and the surface light source, a bottom portion disposed on the side opposite to the side where the protection plate is disposed, A housing having an outer wall portion standing from the outer peripheral edge portion of the bottom portion toward the protection plate and fixed to the protection plate via a second fixing member;
Arranged around the surface light source in a state where it is not interposed between the bottom portion of the housing and the surface light source and is interposed between the bottom portion of the housing and the display panel, A buffer member having a base portion interposed between an outer peripheral edge portion of the surface opposite to the observation side of the display panel and the bottom portion of the housing and pressing the display panel toward the protection plate by elastic repulsion. and, with a,
The outer wall portion of the housing has a frame shape formed so as to surround the entire circumference of the display panel and the surface light source,
Protection plate-integrated display device and the protection plate and the outer wall is characterized that you have been fixed through the second fixing member frame shape. The protection plate integrated display device according to claim 1 ,
The outer wall portion has a bent portion bent at the tip portion so as to extend outward along the protection plate,
The protective plate integrated display device, wherein a surface of the bent portion facing the protective plate is fixed to the protective plate via the second fixing member. The protection plate integrated display device according to claim 1 or 2 ,
The buffer member has an extending portion that extends from the base portion toward the protection plate in a state of surrounding at least a part of the periphery of the display panel;
The protective plate integrated display device, wherein the display panel is not interposed between the extension portion and the protective plate. The protection plate integrated display device according to claim 3 ,
Of the extended portion of the buffer member, a surface facing the protective plate contacts the protective plate, and a surface of the extended portion facing the housing contacts the housing, and the buffer member The protective plate-integrated display device, wherein the protective plate and the casing are pressed by an elastic restoring force of the extending portion. In the protection plate integrated display device according to any one of claims 1 to 4 ,
A light shielding member disposed outside the display region between the display panel and the surface light source and continuously disposed from a region overlapping the surface light source to a region overlapping the base of the buffer member; A protective plate integrated display device. The protection plate integrated display device according to claim 5 ,
The protective plate-integrated display device, wherein the light shielding member is fixed to a base portion of the buffer member and the surface light source. The protection plate integrated display device according to any one of claims 1 to 6 ,
The surface light source has a prism sheet disposed on the observation surface side so as to face the display area of the display panel, and at least the entire display area of the display panel is included in the observation side surface of the surface light source. A protective plate integrated display device, wherein the display device is fixed to the housing in a state of being separated from the display panel.

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