TWI461801B - Transparent display panel and display device - Google Patents

Description

Transparent display panel and display device

The present invention relates to a display panel and a display device, and more particularly to a transparent display panel and a display device.

The transparent display panel means that the display panel itself has a certain degree of penetration and can clearly display the background behind the panel. The transparent display panel is suitable for a variety of applications such as building windows, car windows and shop windows. In addition to the original transparent display function, it also has the potential to be used as an information display in the future, and has received much attention from the market.

In current transparent display panels, the light source required to display an image typically comes from external ambient light or an additional configuration light source. In general, in order to prevent the brightness of the transparent display panel from being too low due to insufficient external ambient light, and the user cannot clearly see the screen displayed by the display, the light source is usually disposed on the side of the transparent display panel relative to the user. However, in order to avoid obstructing the user's line of sight, the light source cannot be placed between the user and the item, but can only be placed around the item. Under such a design, problems such as concentration of the light source, uneven illumination of the article, and poor recognition of the article are easily caused.

The invention provides a transparent display panel, which can provide a light source with uniform brightness, and the article disposed on the back surface of the transparent display panel has good recognition.

The present invention provides a display device that exhibits good visibility with the aforementioned transparent display panel.

The present invention provides a transparent display panel having a front surface and a back surface. The transparent display panel includes a substrate, a plurality of pixel units, a plurality of light emitting units, and a light blocking pattern. The substrate has an image display area, a transparent area and a light emitting area. The pixel unit is disposed in the image display area of the substrate. The light emitting unit is disposed in the light emitting area of the substrate. The light-shielding pattern is disposed corresponding to the light-emitting unit, so that the light shielding the light-emitting unit passes through the front surface of the transparent display panel, wherein an image light emitted by the pixel unit is emitted from the front surface of the transparent display panel, and the light generated by the light-emitting unit is The back surface of the transparent display panel is emitted.

The invention provides a display device comprising a housing and a transparent display panel. The interior of the housing displays at least one item. The transparent display panel is mounted on one surface of the housing, and the transparent display panel has a front surface and a back surface, wherein a user can see the items displayed inside the housing through the front surface of the transparent display panel, the transparent display panel The invention comprises a substrate, a plurality of pixel units, a plurality of light emitting units and a light shielding pattern. The substrate has an image display area, a transparent area and a light emitting area. The pixel unit is disposed in the image display area of the substrate. The light emitting unit is disposed in the light emitting area of the substrate. The light shielding unit is disposed corresponding to the light emitting unit, so that the light shielding the light emitting unit is passed out from the front surface of the transparent display panel, wherein an image light emitted by the pixel unit is emitted from the front surface of the transparent display panel, so that the user can view an image. And the light generated by the light emitting unit is reflected from the back surface of the transparent display panel to the article, and the reflected light passes through the back surface. After the surface is incident on the transparent display panel, the light passes through the transparent area of the substrate and is emitted from the front surface of the transparent display panel to allow the user to view the article on the back surface of the transparent display panel.

Based on the above, the present invention can provide a light source with uniform brightness to an object located on the back surface of the transparent display panel by using the light emitting unit of the transparent display panel, thereby improving the uniformity of light received by the article and the recognition degree of the article. In addition, the light shielding from the light emitting unit is blocked from the front surface of the transparent display panel by the light shielding pattern, thereby further improving the contrast of the transparent display panel, thereby improving the image quality of the transparent display panel.

The above described features and advantages of the present invention will be more apparent from the following description.

FIG. 1 is a top plan view of a transparent display panel according to an embodiment of the invention. Referring to FIG. 1 , the transparent display panel 100 of the present embodiment includes a substrate S1 , a plurality of pixel units PU1 , a plurality of light emitting units EU1 , and a light blocking pattern BP1 . The substrate S1 has an image display area A1, a transparent area A2, and a light-emitting area A3. The pixel unit PU1 is disposed in the image display area A1 of the substrate S, and the light-emitting unit EU1 is disposed in the light-emitting area A3 of the substrate S1. The pattern BP1 corresponds to the light unit setting EU1.

The transparent area A2 includes a plurality of sub-transparent areas A2 _S , and each N pixel units PU1 are disposed corresponding to one sub-transparent area A2 _S . Further, the light-emitting area A3 includes a plurality of sub-light-emitting areas A3 _S , and each N pixel unit PU1 is disposed corresponding to one sub-light-emitting area A3 _S . In this embodiment, one sub-transparent area A2 _{S is used} for every three pixel units PU1 and one sub-light-emitting area A3 _{S is} corresponding to every three pixel units PU1 as an example.

Further, each of the sub-transparent areas A2 _S and the three pixel units PU1 corresponding to each sub-light-emitting area A3 _S may be further divided into a red pixel unit R corresponding to the red display and a green pixel unit corresponding to the green display. G and the blue pixel unit B corresponding to the blue color. In this embodiment, each of the sub-transparent areas A2 _S , each of the sub-light-emitting areas A3 _S, and the three pixel units PU1 corresponding to the two may constitute a structural unit S _U , and the transparent display panel 100 may be a structure The unit S _{U is} repeatedly arranged. It should be noted that this is merely an example, and is not intended to limit each sub-transparent area A2 _S and the number of pixel units PU1 corresponding to each sub-light-emitting area A3 _S , the color display corresponding to the pixel unit PU1, and the pixel. The relative position of the sub-transparent area A2 _S corresponding to the PU1 and the sub-light-emitting area A3 _S.

A cross-sectional view of the transparent display panel 100 will be further described below. 2A is a cross-sectional view of a transparent display panel according to an embodiment of the invention. In particular, Fig. 2A is a schematic cross-sectional view taken along line I-I' of Fig. 1. Referring to FIG. 2A, the transparent display panel 100 has a front surface Sa and a back surface Sb. In the present embodiment, the transparent display panel 100 may further include a pair of substrates S2, wherein the opposite substrate S2 is located opposite to the substrate S1 to cover the pixel unit PU1 and the light emitting unit EU1.

In more detail, the pixel unit PU1, the light-emitting unit EU1, and the light-shielding pattern BP1 are located between the substrate S1 and the opposite substrate S2, and the pixel unit PU1 and the light-emitting unit EU1 are disposed on the substrate S1, and the light-shielding pattern BP1 is disposed on the pair It is disposed on the substrate S2 and opposed to the light-emitting unit EU1. The substrate S1 and the opposite substrate S2 may be transparent substrates made of, for example, glass, quartz, an organic polymer, or other suitable materials. The pixel unit P _{U is} disposed in the image display area A1 of the substrate S, and the pixel unit PU1 may be a self-luminous pixel unit, a reflective pixel unit, or a transmissive pixel unit. The light emitting unit EU1 is disposed in the light emitting area A3 of the substrate S1, and the light emitting unit EU1 may be a plurality of self-illuminating light emitting units.

In the embodiment of Fig. 2A, the pixel unit PU1 is, for example, a self-luminous pixel unit. In other words, the pixel unit PU1 may be an organic electro-luminescence display panel (OLED) pixel unit, a plasma display panel (PDP) pixel unit, and a field emission display panel (Field emission display). , FED) pixel unit or surface conduction electron-emitter display (SED) pixel unit. The light emitting unit EU1 may also be a light emitting unit using the above self-luminous display panel as the embodiment. It should be noted that the light-emitting unit EU1 of the present embodiment may select a self-illuminating light-emitting unit that emits light on one side, and the light generated by the light-emitting unit EU1 is, for example, irradiated toward the back surface of the substrate Sb.

The components of the transparent display panel 100 of FIG. 2A and their configurations are merely illustrative, and the invention is not limited thereto. Another element will be illustrated in Figure 2B and its configuration. 2B is a cross-sectional view of a transparent display panel according to another embodiment of the present invention. Referring to FIG. 2B, the transparent display panel 200 of the present embodiment has similar components and configurations to the transparent display panel 100 of FIG. 2A. The main difference between the two is that the pixel unit PU2 of the present embodiment is a reflective pixel unit.

For example, the pixel unit PU2 can be a reflective pixel unit fabricated by a method of manufacturing a pixel array of a general liquid crystal display (LCD). Here, only the liquid crystal display panel is exemplified, but the invention is not limited thereto. In other embodiments, the reflective pixel unit PU2 may also be a pixel unit of an electrophoretic display panel, a pixel unit of an electrowetting display panel, or other forms of pixel units.

When the pixel unit PU2 is provided by the liquid crystal display panel, the color filter CF may be disposed on the opposite substrate S2 of the corresponding pixel unit PU2, so that the pixel unit PU2 outputs image light of different colors. Further, a black matrix BM may be selectively disposed around the color filter CF to shield light leakage between adjacent two pixel units PU2. Further, a display medium LC is filled between the substrate S1 and the opposite substrate S2 so that the pixel unit PU2 outputs image light rays of different gray levels. It should be noted that, in an embodiment, the transparent region A2 may not fill the display medium LC to make the transparent region A2 have sufficient transmittance. According to another embodiment, if the display medium LC is poured between the substrate S1 and the opposite substrate S2 based on the convenience of the process, the display medium LC located in the transparent area A2 is in a state of continuous light transmission (Normally white). In order to make the transparent region A2 have sufficient light transmittance.

The actual operation method of the aforementioned transparent display panels 100, 200 will be described below with reference to FIG. 3 is a side view showing a transparent display panel to which an embodiment of the present invention is applied. Referring to FIG. 3, the transparent display panel 300 of the present embodiment applies, for example, the transparent display panels 100 and 200 described above. In practical applications, the transparent display panel 300 is located between a user U and an item O. Specifically, the user U is located on the front surface of the transparent display panel 300. Sa, and the article O is located on the back surface Sb of the transparent display panel 300.

When the display is performed, an image light L _PU emitted by the pixel unit (not shown, the pixel unit is located in the image display area A1) is emitted from the front surface Sa of the transparent display panel 300, so that the user U views an image. . In addition, the light L _EU generated by the light emitting unit (not shown, the light emitting unit is located in the light emitting area A3) is emitted from the back surface Sb of the transparent display panel 300 to the object O, and is reflected by the object O, and the reflected light L _R After the back surface Sb is incident on the transparent display panel 300, the light ray L _R passes through the transparent area A2 of the substrate S1 and is emitted from the front surface Sa of the transparent display panel 300, so that the user U sees the back surface of the transparent display panel 300. Item O of Sb. In this way, the user U can simultaneously view the item O located behind the transparent display panel 300 and the image to be displayed by the transparent display panel 300.

It should be noted that, in this embodiment, a plurality of light emitting units are provided in the transparent display panel 300, and the light L _EU generated by the light emitting unit is directed to the front side of the user U of the article O. Therefore, compared with the prior art, the light source is disposed on the periphery of the article instead of the front surface viewed by the user U. The article O placed behind the transparent display panel 300 of the embodiment can have better uniformity of light reception and comparison. Good recognition.

Further, the present embodiment the light blocking pattern BP1 by the light emitting unit disposed on the side (the side adjacent to the user U), the light shielding pattern BP1 L _EU block light emitted from the light emitting unit front surface Sa of the transparent display panel 300 from Leaking out can further improve the contrast of the image to be displayed on the transparent display panel 300, so that the image quality of the transparent display panel 300 is superior.

It should be noted that the pixel unit, the light unit, and the shading of the present application The pattern is not limited to the aforementioned configuration. This will be described below with reference to FIGS. 4 and 5. 4 and 5 are schematic top views of a transparent display panel according to another embodiment of the present invention. Referring to FIG. 4, the transparent display panel 400 of the present embodiment has a film layer similar to the transparent display panel 100 of FIG. The difference between the two is mainly that the light-emitting area A4 of the present embodiment is disposed in a cross-shaped area across the substrate S. In the present embodiment, the light emitting unit EU2 is also disposed in the light emitting area A4 of the substrate S1, and the light blocking pattern BP2 is disposed corresponding to the light emitting unit EU2. In other words, the shape of the light-emitting unit EU2 and the light-shielding pattern BP2 is the same as the light-emitting area A4.

Referring to FIG. 5, the transparent display panel 500 of the present embodiment has a film layer similar to the transparent display panel 100 of FIG. The difference between the two is mainly that the light-emitting area A5 of the present embodiment is a frame-shaped area provided around the substrate S1. In the present embodiment, the light emitting unit EU3 is also disposed in the light emitting area A5 of the substrate S1, and the light blocking pattern BP3 is disposed corresponding to the light emitting unit EU3. In other words, the shape of the light-emitting unit EU3 and the light-shielding pattern BP3 is a hollow rectangle (frame shape) as the light-emitting area A5.

It is worth mentioning that the transparent display panels 100, 200, 300, 400, 500 of the foregoing embodiments can be applied to a variety of display devices, including building windows, shop windows, coin-operated beverage machines, and the like. The following special display device will be described with reference to FIG. 6. FIG. 6 illustrates a display device to which the transparent display panel of the foregoing embodiment is applied. Referring to FIG. 6 , the display device DD of the embodiment includes a housing 610 and a transparent display panel 600 . The interior of the housing 610 presents at least one item 620. The transparent display panel 600 is mounted on one surface of the housing 610. The transparent display panel 600 is located at the user U and between items 620. Specifically, the user U is located on the front surface Sa of the transparent display panel 600, and the article 620 is located on the back surface Sb of the transparent display panel 600.

For example, the display device DD can be a display case, a beverage vending machine, a showcase, or other suitable item. In the present embodiment, the display device 100 is, for example, a window for displaying an item 620 contained therein, and the transparent display panel 600 is disposed on a side of the window adjacent to the user U for displaying an image. For example, the image light emitted by the transparent display panel 600 by the pixel unit may be the price of the item 620 displayed inside the housing 610, the advertisement of other products, or any other desired information.

In addition, the opposite substrate in the transparent display panel 600 (please refer to FIG. 2A or FIG. 2B ) may be combined with the touch panel to provide the function of the transparent display panel 600 to touch. In this way, the transparent display panel 600 can provide the function of the user U interacting with the transparent display panel 600 in addition to displaying the image. In this configuration, the function of the transparent display panel 600 can be further improved, and the user U needs for the versatility of the current display panel.

In summary, the present invention can provide a plurality of light emitting units in a transparent display panel, and direct the light generated by the light emitting unit to the front side of the article viewed by the user, thereby providing a light source with uniform brightness to the transparent display panel. The item on the back surface, and enhances the uniformity of light received by the item and the recognition of the item. In addition, by providing the light-shielding pattern in the opposite direction of the light-emitting unit, the light-shielding pattern blocks the light emitted by the light-emitting unit from leaking from the front surface of the transparent display panel, thereby improving the contrast of the transparent display panel and obtaining good image quality.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100, 200, 300, 400, 500, 600‧‧‧ transparent display panels

610‧‧‧shell

620, O‧‧‧ items

S1‧‧‧ substrate

Sa‧‧‧ front surface

Sb‧‧‧ back surface

S2‧‧‧ opposite substrate

PU1, PU2‧‧‧ pixel unit

EU1, EU2, EU3‧‧‧Lighting unit

BP1, BP2, BP3‧‧‧ shading pattern

A1‧‧‧Image display area

A2‧‧‧Transparent Zone

A2 _S ‧‧‧Sub-transparent area

A3, A4, A5‧‧‧Lighting area

A3 _S ‧‧‧ sub-lighting area

R‧‧‧ red pixel unit

G‧‧‧Green pixel unit

B‧‧‧Blue pixel unit

S _U ‧‧‧Structural unit

CF‧‧‧ color filters

BM‧‧‧Black Matrix

LC‧‧‧Display media

U‧‧‧Users

L _PU ‧‧‧Image light

L _EU , L _R ‧‧‧Light

DD‧‧‧ display device

I-I’‧‧‧ cut line

FIG. 1 is a top plan view of a transparent display panel according to an embodiment of the invention.

2A is a cross-sectional view of a transparent display panel according to an embodiment of the invention.

2B is a cross-sectional view of a transparent display panel according to another embodiment of the present invention.

3 is a side view showing a transparent display panel to which an embodiment of the present invention is applied.

4 and 5 are schematic top views of a transparent display panel according to another embodiment of the present invention.

FIG. 6 illustrates a display device to which the transparent display panel of the foregoing embodiment is applied.

300‧‧‧Transparent display panel

O‧‧‧ items

Sa‧‧‧ front surface

Sb‧‧‧ back surface

BP1‧‧‧ shading pattern

A1‧‧‧Image display area

A2‧‧‧Transparent Zone

A3‧‧‧Lighting area

U‧‧‧Users

L _PU ‧‧‧Image light

L _EU , L _R ‧‧‧Light

Claims (10)

A transparent display panel having a front surface and a back surface, and the transparent display panel includes: a substrate having an image display area, a transparent area and a light emitting area; and a plurality of pixel units disposed on the transparent display panel a plurality of light-emitting units disposed in the light-emitting area of the substrate; and a light-shielding pattern disposed corresponding to the light-emitting units to shield light of the light-emitting units from the transparent display panel The front surface is ejected, and an image light emitted by the pixel units is emitted from the front surface of the transparent display panel, and light generated by the light emitting units is emitted from the back surface of the transparent display panel. The transparent display panel of claim 1, wherein the transparent region comprises a plurality of sub-transparent regions, and each N pixel units are disposed corresponding to one sub-transparent region. The transparent display panel of claim 1, wherein the light-emitting area comprises a plurality of sub-light-emitting areas, and each of the N pixel units is disposed corresponding to one of the sub-light-emitting areas. The transparent display panel of claim 1, wherein the light-emitting area is a frame-shaped area disposed around the substrate or a cross-shaped area traversing the substrate. The transparent display panel of claim 1, further comprising a pair of substrates located opposite to the substrate to cover the pixel units and the light units. The transparent display panel of claim 1, wherein the pixel units are a plurality of self-luminous pixel units or a plurality of reflective pixel units. The transparent display panel of claim 1, wherein the light emitting units are a plurality of self-illuminating light emitting units. A display device comprising: a housing, wherein the interior of the housing displays at least one item; and a transparent display panel mounted on one surface of the housing, the transparent display panel having a front surface and a back a surface, wherein the user can see the article displayed inside the casing through the front surface of the transparent display panel, the transparent display panel includes: a substrate having an image display area, a transparent area, and a light emitting a plurality of pixel units disposed in the image display area of the substrate; a plurality of light emitting units disposed in the light emitting area of the substrate; and a light blocking pattern disposed corresponding to the light emitting units to shield the area The light of the light-emitting unit is emitted from the front surface of the transparent display panel, wherein an image light emitted by the pixel units is emitted from the front surface of the transparent display panel, so that the user can view an image, and the image The light generated by the light emitting units is reflected from the back surface of the transparent display panel to the object, and the reflected light passes through the object. After the incident surface of the transparent display panel, the light passes through the transparent region of the substrate and emitted from the front surface of the transparent display panel, so that the user to view the transparent display located on the back surface of the panel was Product. The display device of claim 8, wherein the light-emitting region comprises a plurality of sub-light-emitting regions, and each of the N pixel units is disposed corresponding to one of the sub-light-emitting regions. The display device of claim 8, wherein the light-emitting area is a frame-shaped area disposed around the substrate or a cross-shaped area traversing the substrate.