CN205992531U - Transparent display - Google Patents

Abstract

A transparent display comprises a front transparent substrate, a light emitting layer, a common electrode layer, a light modulation layer and a rear transparent substrate. The front light-transmitting substrate has a plurality of pixel regions. The pixel regions are respectively provided with an active element. The light emitting layer is laminated on the front light-transmitting substrate. The common electrode is stacked on the light-emitting layer. The common electrode layer has at least one light-transmitting region. The projection of the light-transmitting area to the front light-transmitting substrate is at least partially non-overlapped with the plurality of active elements of the plurality of pixel areas. The light modulation layer is provided on the common electrode layer. The back light-transmitting substrate is stacked on the light modulation layer. Wherein, the luminescent layer and the light modulation layer are electrically connected with the common electrode layer.

Description

transparent display

technical field

The present invention relates to a display device, in particular to a transparent display.

Background technique

With the advancement of display technology, transparent displays have been gradually developed. A transparent display means that it has a certain degree of light transmission, so that users can clearly see the background image behind the transparent display. Transparent displays can be used in various applications such as building windows, car windows, shop windows, etc., and thus attract market attention. In general, transparent displays can be classified into self-illuminating and non-self-illuminating types. The self-illuminating transparent display does not need to be provided with a backlight module that blocks part of the background image light beam, so it is more suitable for application in the transparent display field than the non-self-illuminating transparent display.

The self-luminous transparent display includes an organic electroluminescent transparent display using an organic light-emitting layer as a display medium. Considering the problem of work function matching, the cathode of the existing organic light-emitting layer is still made of metal. Since the metal cathode will hinder light penetration, the thickness of the cathode is generally as thin as possible to increase the transmittance of the self-luminous transparent display. However, the method of thinning the cathode has no obvious effect on improving the transmittance, but also increases the resistance and limits the size of the self-luminous transparent display.

In addition, since the transparent organic light-emitting layer does not have a shutter structure, the influence of ambient light on the display quality cannot be adjusted, so the display quality of the existing transparent display using the organic light-emitting layer is easily affected by the ambient light. Therefore, how to improve the insufficient transmittance of the existing self-luminous transparent display and the problem that the display quality of the self-luminous transparent display is easily affected by ambient light is one of the problems that researchers should solve.

Contents of the invention

The present invention provides a transparent display, thereby improving the light transmittance of the transparent display and adjusting the degree of influence of ambient light on display quality.

The transparent display disclosed by an embodiment of the present invention includes a front light-transmitting substrate, a light-emitting layer, a common electrode layer, a light-modulating layer and a rear light-transmitting substrate. The front transparent substrate has a plurality of pixel areas. These pixel areas each have an active element. The light emitting layer is stacked on the front transparent substrate. The common electrode layer is stacked on the light emitting layer. The common electrode layer has at least one light-transmitting region. The projection of the light-transmitting area to the front light-transmitting substrate does not overlap with the active elements of the pixel areas at least partially. The light modulation layer is stacked on the common electrode layer. The rear light-transmitting substrate is stacked on the light-modulating layer. Wherein, both the light emitting layer and the light modulating layer are electrically connected to the common electrode layer.

In the transparent display disclosed in an embodiment of the present invention, the common electrode layer includes a plurality of metal electrodes, the light-emitting layer includes a plurality of self-luminous elements, and the projection of the plurality of self-luminous elements on the front light-transmitting substrate and the plurality of metal electrodes Projections on the front light-transmissive substrate at least partially overlap.

In the transparent display disclosed in an embodiment of the present invention, the common electrode layer further includes a plurality of transparent electrodes, the plurality of metal electrodes and the plurality of transparent electrodes are alternately arranged, and the opposite sides of the plurality of metal electrodes are connected to the positions between the plurality of transparent electrodes. The opposite sides of each are respectively attached and electrically connected to the light-emitting layer and the light-modulating layer.

In the transparent display disclosed in an embodiment of the present invention, the common electrode layer further includes a transparent electrode, and the transparent electrode layer includes a connection section and a plurality of extension sections, and the connection section is attached and electrically connected to the light modulator The layer, the extension section and the metal electrode are alternately arranged between the connection section and the light emitting layer, and the opposite sides of the extension section and the metal electrode are respectively electrically connected to the connection section and the light emission layer.

In the transparent display disclosed in an embodiment of the present invention, the projections of multiple self-luminous elements on the front light-transmitting substrate are respectively located in a plurality of pixel areas, and the proportions of the self-luminous elements in the pixel areas are less than 15%. .

In the transparent display disclosed in an embodiment of the present invention, the luminescent layer further includes at least one protective layer, and the protective layer is stacked on the self-luminous element.

In the transparent display disclosed in an embodiment of the present invention, each self-illuminating element has an outer edge of the self-illuminating element, the metal electrode exceeds the outer edge of the self-illuminating element, and the length of the metal electrode exceeds the outer edge of the self-illuminating element greater than H/(N ₀ ² -1) ^1/2 , where H is the thickness of the protective layer, and N ₀ is the refractive index of the protective layer.

In the transparent display disclosed in an embodiment of the present invention, the metal electrode exceeds the outer edge of the self-luminous element, and the length of the metal electrode beyond the outer edge of the self-luminous element is less than 2H/(N ₀ ² -1) ^1/2 , Wherein, H is the thickness of the protective layer, N ₀ is the refractive index of the protective layer.

In the transparent display disclosed in an embodiment of the present invention, each self-luminous element has an outer edge of the self-luminous element, and the protective layer has a plurality of light-guiding structures, and the plurality of light-guiding structures are respectively located on the plurality of self-luminous elements. outside the rim.

In the transparent display disclosed by an embodiment of the present invention, each of the plurality of light guide structures includes a groove, and each of the plurality of grooves has at least one inclined surface, and the plurality of inclined surfaces respectively face the plurality of self-luminous elements. According to the transparent display of the above embodiment, since the light-emitting layer and the light-modulating layer share a common electrode layer, the metal electrodes of the common electrode layer can effectively reduce resistance and improve driving uniformity, so the color uniformity of the light-modulating layer can be improved.

Furthermore, because the light-emitting layer and the light-modulating layer share a common electrode layer, the metal electrode of the common electrode layer will be interposed between the light-emitting layer and the light-modulating layer, so the metal electrode can reflect the light emitted by these self-luminous elements, The light emitted from these self-illuminating elements to the rear is condensed back to the front of the transparent display, thereby improving the luminous efficiency of the transparent display.

The above description about the content of the present invention and the following description of the implementation are used to demonstrate and explain the principle of the present invention, and provide a further explanation of the patent application scope of the present invention.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a transparent display according to a first embodiment of the present invention.

FIG. 2 is a schematic top view of the thin film transistor layer and the self-luminous device in FIG. 1 .

FIG. 3 is a schematic cross-sectional view of a transparent display according to a second embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a transparent display according to a third embodiment of the present invention.

FIG. 5 is a schematic cross-sectional view of a transparent display according to a fourth embodiment of the present invention.

FIG. 6 is a partially enlarged schematic diagram of FIG. 5 .

7 is a schematic cross-sectional view of a transparent display according to a fifth embodiment of the present invention.

FIG. 8 is a schematic cross-sectional view of a transparent display according to a sixth embodiment of the present invention.

Explanation of reference signs:

10, 10a, 10b, 10c, 10d Transparent display

100 front transparent substrate

110 front substrate layer

120 thin film transistor layers

130 metal wire

140 active components

150 pixel area

200 luminous layers

210 Self-luminous components

211 Outer edge of self-luminous components

220 protective layers

221 flat surface

222 grooves

223 inclined plane

300, 300a, 300b common electrode layer

310 metal electrodes

320 Translucent area

320a, b transparent electrodes

321a Coupling paragraph

322a extension

330a, 330b light transmission area

400 light modulation layers

500 rear light-transmitting substrate

510 transparent conductive layer

511 metal wire

520 rear substrate layer

θ included angle

l Distance

l1, l2 length

H thickness

L1, L2, L3 Light from self-illuminating elements

LB1, LB2 ambient light

detailed description

Please refer to Figure 1 to Figure 2. FIG. 1 is a schematic cross-sectional view of a transparent display according to a first embodiment of the present invention. FIG. 2 is a schematic top view of the thin film transistor layer and the self-luminous device in FIG. 1 .

The transparent display 10 of this embodiment includes a front transparent substrate 100 , a light emitting layer 200 , a common electrode layer 300 , a light modulation layer 400 and a rear transparent substrate 500 .

The front transparent substrate 100 includes a front substrate layer 110 and a thin film transistor layer 120 . The thin film transistor layer 120 is stacked on the front substrate layer 110 . The TFT layer 120 has a plurality of metal wires 130 and a plurality of active elements 140 . The metal wires 130 surround a plurality of pixel regions 150 . The active elements 140 are, for example, thin film transistors, which are respectively located in the pixel regions 150 and electrically connected to the metal wires 130 .

The light emitting layer 200 is stacked on the thin film transistor layer 120 of the front transparent substrate 100 . The light emitting layer 200 has a plurality of self-luminous elements 210 and a protection layer 220 . The self-illuminating elements 210 are, for example, micro LEDs, and the projections of the self-illuminating elements 210 on the front light-transmitting substrate 100 are respectively located in the pixel regions 150 and electrically connected to the active elements 140 . In addition, the proportions of the self-luminous elements 210 in the pixel regions 150 are less than 15%. In fact, since these self-illuminating elements 210 do not have light transmission, under the premise that the brightness of the transparent display 10 is sufficient, the proportions of these self-illuminating elements 210 in these pixel regions 150 should be as small as possible. The light transmittance of the transparent display 10 is improved. The protection layer 220 is stacked on the self-luminous elements 210 . The protective layer 220 has properties of light transmission, insulation and waterproof, so as to protect the self-luminous elements 210 and take into account the light transmittance of the transparent display 10 .

In addition, the loss of light penetration (about 1 percent) of the micro-LEDs is much smaller than the loss of light penetration of the cathode of the organic light-emitting diode (about more than 20 percent), so the use of micro-light-emitting diodes can make the transparent display 10 have a higher light transmittance.

The common electrode layer 300 is stacked on the light emitting layer 200 . The common electrode layer 300 includes a plurality of metal electrodes 310 , such as common electrodes. Projections of the self-illuminating elements 210 on the front transparent substrate 100 and projections of the metal electrodes 310 on the front transparent substrate 100 overlap at least partially. In this embodiment, the metal electrodes 310 cover the side of the self-luminous elements 210 away from the TFT layer 120 in a one-to-one manner. Further, each self-illuminating element 210 has an outer edge 211 of the self-illuminating element. The metal electrode 310 exceeds the outer edge 211 of the self-luminous element, and the length l1 of the metal electrode 310 beyond the outer edge 211 of the self-luminous element is greater than H/(N ₀ ² -1) ² and less than 2H/(N ₀ ² -1) ² . Moreover, in this embodiment, a part of the metal electrode 310 exceeds the outer edge 211 of the self-luminous element and covers the active element 140, and the length l2 of this part only needs to meet the size greater than H/(N ₀ ² -1) ² It is stipulated that less than 2H/(N ₀ ² -1) ² size regulations are not required to be complied with. Wherein, H is the thickness of the protective layer 220 , and N0 is the refractive index of the protective layer 220 . In this way, these metal electrodes 310 can reflect part of the light emitted by these self-luminous elements 210, so that part of the light originally emitted by these self-luminous elements 210 to the rear (as shown by L1) is recondensed back to the front of the transparent display 10, and then The luminous efficiency of the transparent display 10 is improved. Furthermore, since the length of the metal electrode 310 beyond the outer edge 211 of the self-luminous element is greater than H/(N ₀ ² -1) ² , the light emitted from these self-luminous elements 210 to the rear (as shown in L2 ), Although it is not irradiated in the range covered by the metal electrode 310, because the incident angle of the light L2 is greater than the total reflection angle when it irradiates the interface of the protective layer 220 close to the common electrode layer 300, the light that is not irradiated on the metal electrode 310 (as indicated by L2 shown) can also be reflected back to the front of the transparent display 10 through the principle of total reflection.

In addition, there is at least one light-transmitting region 320 in the common electrode layer 300 , and the projection of the light-transmitting region 320 to the front light-transmitting substrate 100 at least partially does not overlap with the active elements 140 of the pixel regions 150 . In detail, the metal electrodes 310 only cover part of the light emitting layer 200 , and the light-transmitting region 320 is the area not covered by the metal electrodes 310 . The light-transmitting area 320 does not overlap with the active elements 140 of the pixel areas 150, so that the ambient light behind the transparent display 10 can pass through the light-transmitting area 320 to the front of the transparent display 10, so that users can enjoy the transparent display 10 , and enjoy the scenery behind the transparent display 10 at the same time.

The light modulation layer 400 is stacked on the common electrode layer 300 , and the light modulation layer 400 and the self-luminous elements 210 of the light emitting layer 200 are electrically connected to the metal electrodes 310 of the common electrode layer 300 . That is to say, the self-luminous elements 210 of the light-emitting layer 200 share the metal electrodes 310 with the light-modulating layer 400. These metal electrodes can effectively reduce resistance and improve driving uniformity, so the current can drive the light-modulating layer more uniformly. 400 to regulate the light transmittance.

The reason why these self-luminous elements 210 of the light-emitting layer 200 and the light-modulating layer 400 can share these metal electrodes 310 is that, compared with organic light-emitting diodes, these self-luminous elements 210 (light-emitting diodes) have better water and oxygen blocking characteristics. , the need for waterproofing is low, so conductive wires can be installed on the protective layer 220 covering the self-luminous elements 210 so that the self-luminous elements 210 can be electrically connected to the metal electrodes 310 of the common electrode layer 300 .

In addition, the light modulating layer 400 can adjust its light transmittance by changing the voltage or current. If you want to see the scenery behind the transparent display 10 , you can increase the light transmittance of the light modulating layer 400 so that the ambient light LB1 can pass through the light-transmitting area 320 to the front of the transparent display 10 . If the ambient light behind the transparent display 10 does not want to affect the image presentation of the transparent display 10 , the transmittance of the light-modulating layer 400 can be lowered so that the light-modulating layer 400 blocks the penetration of the ambient light LB2 .

In addition, as long as the ratio of the transmitted light can be adjusted, it can be called the light modulation layer 400 . The light modulation layer 400 in this embodiment is an example of an electrochromic layer, but it is not limited thereto. In other embodiments, the light modulation layer 400 can also be an electrowetting light modulation layer, a liquid crystal light modulation layer , Polymer dispersion layer or electrophoretic light adjustment layer. Among them, the electrophoretic light modulation layer, the liquid crystal light modulation layer, the polymer dispersion light modulation layer and the electrowetting light modulation layer are driven by voltage, while the electrochromic layer of this embodiment is driven by current. The principle of the electrochromic layer is to inject electric current into the material to generate electrochemical changes, and then make the material change color to form a light modulation effect. Electrochromic materials can be divided into inorganic and organic. The inorganic electrochromic materials can be tungsten oxide (WO3), molybdenum oxide (MoO3), nickel oxide (NiOx), Prussian blue and vanadium pentoxide (V2O5). The organic electrochromic material can be viologen, polyethylenedioxythiophene (PEDOT), phthalocyanine, and the like.

The rear transparent substrate 500 includes a transparent conductive layer 510 and a rear substrate layer 520 . The transparent conductive layer 510 is stacked on the light modulation layer 400 . The rear substrate layer 520 is stacked on the transparent conductive layer 510 .

In the above embodiment, the common electrode layer 300 only includes a plurality of metal electrodes 310 , but it is not limited thereto, please refer to FIG. 3 . FIG. 3 is a schematic cross-sectional view of a transparent display according to a second embodiment of the present invention.

In the transparent display 10a of this embodiment, the common electrode layer 300a includes a metal electrode 310a and a transparent electrode 320a. These metal electrodes 310 a are, for example, common electrodes, and the sheet resistance of the metal electrodes 310 a is 0.05˜5 Ω/cm. Projections of the self-illuminating elements 210 on the front transparent substrate 100 and projections of the metal electrodes 310 a on the front transparent substrate 100 overlap at least partially. The sheet resistance of the transparent electrode layer 320a is between 5-200Ω/cm, and includes a connecting segment 321a and a plurality of extending segments 322a. The connection section 321 a is attached and electrically connected to the light modulation layer 400 . The extension sections 322a and the metal electrodes 310a are alternately arranged between the connecting section 321a and the light emitting layer 200 , and opposite sides of the extending sections 322a and the metal electrodes 310a are respectively electrically connected to the connecting section 321a and the light emitting layer 200 .

In addition, there is at least one light-transmitting region 330a in the common electrode layer 300a. The projection of the light-transmitting region 330 a onto the front light-transmitting substrate 100 does not overlap at least partially with the active elements 140 of the pixel regions 150 . In detail, the metal electrodes 310a and the extensions 322a of the transparent electrodes 320a are alternately arranged to cover the light-emitting layer 200 together, and the light-transmitting region 330a is the area covered by the extensions 322a of the transparent electrodes 320a. The light-transmitting area 330a does not overlap with the active elements 140 of the pixel areas 150, so that the ambient light behind the transparent display 10 can pass through the light-transmitting area 330a to the front of the transparent display 10, so that the user can appreciate the transparent display 10 at the same time. , and enjoy the scenery behind the transparent display 10 at the same time.

In this embodiment, the common electrode layer 300a is a compound of the metal electrode 310a and the transparent electrode 320a. The resistance improves the driving uniformity, so the current can drive the light modulating layer 400 more uniformly. In this way, the color tone of the light modulation layer 400 can be more uniform.

See Figure 4. FIG. 4 is a schematic cross-sectional view of a transparent display according to a third embodiment of the present invention.

In the transparent display 10b of this embodiment, the common electrode layer 300b includes a metal electrode 310b and a transparent electrode 320b. These metal electrodes 310 b are, for example, common electrodes, and the sheet resistance of the metal electrodes 310 b is 0.05˜5 Ω/cm. Projections of the self-illuminating elements 210 on the front transparent substrate 100 and projections of the metal electrodes 310b on the front transparent substrate 100 overlap at least partially. The sheet resistance of the transparent electrode layer 320b is between 5-200Ω/cm. The metal electrodes 310b and the transparent electrodes 320b are alternately arranged, and the opposite sides of the metal electrodes and the opposite sides of the transparent electrodes are respectively attached and directly electrically connected to the light-emitting layer and the light-modulating layer

In addition, there is at least one light-transmitting region 330b in the common electrode layer 300b. The projection of the light-transmitting region 330 b onto the front light-transmitting substrate 100 does not overlap at least partially with the active elements 140 of the pixel regions 150 . In detail, the metal electrodes 310b and the transparent electrodes 320b are alternately arranged, and together cover the light-emitting layer 200, and the light-transmitting region 330b is the region covered by the transparent electrodes 320b. The light-transmitting area 330b does not overlap with the active elements 140 of the pixel areas 150, so that the ambient light behind the transparent display 10 can pass through the light-transmitting area 330b to the front of the transparent display 10, so that the user can appreciate the transparent display 10 , and enjoy the scenery behind the transparent display 10 at the same time.

Compared with the embodiment in FIG. 1 , the common electrode layer 300 b in this embodiment is a combination of the metal electrode 310 b and the transparent electrode 320 b to allow the light modulation layer 400 to be adjusted more uniformly. Compared with the embodiment of FIG. 3 , because the resistance values of the first current flow path (flowing through the metal electrode 310b) and the second current flow path (flowing through the metal electrode 310b and the transparent electrode 320b) are relatively different, so The adjusted uniformity of the light modulating layer 400 of this embodiment is between the embodiment of FIG. 1 and the embodiment of FIG. 3 .

Please refer to Figure 5 and Figure 6. FIG. 5 is a schematic cross-sectional view of a transparent display according to a fourth embodiment of the present invention. FIG. 6 is a partially enlarged schematic diagram of FIG. 5 .

In the transparent display 10b of this embodiment, the protection layer 220 has a flat surface 221 and a plurality of light guide structures. The flat surface 221 faces the common electrode layer 300b. Each of the light guide structures includes a groove 222 , and each of the grooves 222 has at least one slope 223 . These slopes 223 respectively face the self-luminous components 210, so that the light L1 emitted by the self-luminous components 210 can be reflected to the front of the transparent display 10b through the metal electrode 310b, and part of the light L3 will be reflected to the transparent display through the slopes 223. 10b to further enhance the light intensity of the transparent display 10b. In this embodiment, the included angle between the inclined surfaces 223 and the flat surface 221 is 50 degrees. According to actual measurements, the light output intensity of the transparent display 10 of this embodiment is about four times that of the embodiment without the protective layer 220 provided with the groove 222 (that is, the angle between the slope 223 and the flat surface 221 is 0 degrees).

Please refer to Figure 7 and Figure 8. 7 is a schematic cross-sectional view of a transparent display according to a fifth embodiment of the present invention. FIG. 8 is a schematic cross-sectional view of a transparent display according to a sixth embodiment of the present invention.

As shown in FIG. 7 , the transparent conductive layer 510 of the transparent display 10c of this embodiment may further have a plurality of metal wires 511 . These metal wires 511 are arranged in a grid shape, for example. Disposing these metal wires on the light modulating layer 400 can reduce the resistance of the transparent conductive layer 510 . In addition, the positions of these metal wires 511 may overlap with the positions of the original metal lines on the rear substrate layer 520 to reduce additional light penetration loss.

As shown in FIG. 8 , the transparent conductive layer 510 of the transparent display 10 d of this embodiment may further have a plurality of metal wires 511 and a plurality of active elements 512 . These metal wires 511 are arranged in a grid shape, for example. The active elements 512 are electrically connected to the metal wires 511 . These active elements 512 can perform individual pixel dimming on the light modulating layer 400 . That is to say, disposing these active elements 512 can make the light modulating layer 400 achieve the effect of partial light transmission and partial non-transmission.

According to the transparent display of the above embodiment, since the light-emitting layer and the light-modulating layer share a common electrode layer, the metal electrodes of the common electrode layer can effectively reduce resistance and improve driving uniformity, so the color uniformity of the light-modulating layer can be improved.

Furthermore, because the light-emitting layer and the light-modulating layer share a common electrode layer, the metal electrode of the common electrode layer will be interposed between the light-emitting layer and the light-modulating layer, so the metal electrode can reflect the light emitted by these self-luminous elements, The light emitted from these self-illuminating elements to the rear is condensed back to the front of the transparent display, thereby improving the luminous efficiency of the transparent display.

In addition, the loss of light transmission (about 1 percent) of micro-LEDs is much smaller than the loss of light transmission (about 20 percent) of cathodes of organic light-emitting diodes, so the use of micro-light-emitting diodes can make transparent displays have higher transmittance. luminosity.

In addition, the common electrode layer is a combination of a metal electrode and a transparent electrode. The connection section through the transparent electrode is attached to the light modulation layer on the entire surface, and the metal electrode can reduce resistance and improve driving uniformity, so the current can be more evenly distributed. Drive the light modulation layer.

Although the present invention is disclosed above with the above-mentioned preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of patent protection for new models shall be defined by the claims attached to this specification.

Claims (10)

1. A transparent display, characterized in that it comprises: A front light-transmitting substrate, the front light-transmitting substrate has a plurality of pixel areas, and each of the plurality of pixel areas has an active element; a light-emitting layer stacked on the front light-transmitting substrate; A common electrode layer stacked on the light-emitting layer, the common electrode layer has at least one light-transmitting area, and the projection of the light-transmitting area to the front light-transmitting substrate is at least partly the same as the plurality of pixels in the plurality of pixel areas. source elements do not overlap; a light modulation layer stacked on the common electrode layer; and A rear light-transmitting substrate stacked on the light-modulating layer; Wherein, both the light emitting layer and the light modulating layer are electrically connected to the common electrode layer. 2. The transparent display according to claim 1, wherein the common electrode layer comprises a plurality of metal electrodes, the light-emitting layer comprises a plurality of self-luminous elements, and the plurality of self-luminous elements are transparent in the front The projection of the optical substrate and the projections of the plurality of metal electrodes on the front transparent substrate at least partially overlap. 3. The transparent display according to claim 2, wherein the common electrode layer further comprises a plurality of transparent electrodes, the plurality of metal electrodes are arranged alternately with the plurality of transparent electrodes, and the plurality of metal electrodes The opposite sides of the electrodes and the plurality of transparent electrodes are respectively attached and electrically connected to the light-emitting layer and the light-modulating layer. 4. The transparent display as claimed in claim 2, wherein the common electrode layer further comprises a transparent electrode, the transparent electrode layer comprises a connection section and a plurality of extension sections, and the connection section is attached and electrically connected In the light modulating layer, the plurality of extension segments and the plurality of metal electrodes are alternately arranged between the connection segment and the light-emitting layer, and opposite sides of the plurality of extension segments and the plurality of metal electrodes are The sides are respectively electrically connected to the connecting segment and the light emitting layer. 5. The transparent display according to claim 2, wherein the projections of the plurality of self-illuminating elements on the front light-transmitting substrate are respectively located in the plurality of pixel areas, and the plurality of self-illuminating elements The proportions of elements respectively in the plurality of pixel areas are less than 15%. 6 . The transparent display according to claim 2 , wherein the light emitting layer further comprises at least one protective layer, and the protective layer is stacked on the plurality of self-luminous elements. 7. The transparent display as claimed in claim 6, wherein each of the self-illuminating elements has an outer edge of the self-illuminating element, the metal electrode exceeds the outer edge of the self-illuminating element, and the metal electrode exceeds the outer edge of the self-illuminating element. The length of the outer edge of the self-illuminating element is greater than H/(N ₀ ² −1) ^1/2 , wherein H is the thickness of the protective layer, and N ₀ is the refractive index of the protective layer. 8. The transparent display according to claim 7, wherein the metal electrode exceeds the outer edge of the self-luminous element, and the length of the metal electrode beyond the outer edge of the self-luminous element is less than 2H/(N ₀ ² -1) ^1/2 , where H is the thickness of the protective layer, and N ₀ is the refractive index of the protective layer. 9. The transparent display as claimed in claim 6, wherein each of the self-luminous elements has an outer edge of the self-luminous element, and the protective layer has a plurality of light guide structures, and the plurality of light guide structures are respectively located on the Outside the outer edge of multiple self-illuminating components. 10. The transparent display according to claim 9, wherein each of the plurality of light guide structures comprises a groove, and each of the plurality of grooves has at least one inclined surface, and the plurality of inclined surfaces respectively face The plurality of self-illuminating elements.