TWI815580B - A display device that allows external objects to be displayed - Google Patents

Abstract

A display device that allows external objects to be displayed, including a body formed with a space, a backlight module located in the space, and a display module located in the space, the backlight module having a light projection surface, The display module and the backlight module are separated by a distance, and the distance is long enough to allow at least one external object level to be located therein. The display module includes a transparent display structure, and a display module is located on the transparent display structure facing the projection. A first optical film on the light side, and a second optical film on the side of the transparent display structure away from the light projection surface. The first optical film allows the light directly projected by the backlight module to be reflected by the body. The second optical film allows the light from the transparent display structure to pass through, and reflects an ambient light outside the body.

Description

A display device that allows external objects to be displayed

The present invention relates to a display device, and in particular, to a display device that allows external objects to be displayed therein.

According to the investigation, there are many implementations of transparent display structures in the field of display devices, such as those disclosed in CN 105940441B, CN 103576357B, CN 106133587B, TW I610116 and US 9753341B. However, existing display devices generally can only provide transparent display structure display functions without any Those who also provide display functions.

At present, display devices are generally implemented in a stacked structure, that is, the backlight module, display structure and polarizing structure are closely arranged in sequence. As a result, the conventional structure cannot provide external object settings and cannot provide display functions. When external objects are placed in a conventional display device, the distance between the backlight module and the display structure will be lengthened, resulting in insufficient light transmittance of the conventional display device and the inability to clearly display the external objects. In addition, for existing display devices equipped with mirror effects, the display devices are limited by high brightness and high transmittance, which compromises the mirror effect; conversely, maintaining the mirror effect affects the brightness of the display device.

Although US 2013107160A discloses the technology of placing external objects in it and using it as a display device for external objects, US 2013107160A avoids the aforementioned defect of insufficient light transmittance and also prevents the light projected by the backlight module from being blocked by external objects. There is a problem of shielding, so US 2013107160A requires an additional light source for external objects. In addition, US 2013107160A does not disclose that the display device has a mirror effect, or raises the issue that improving the display device cannot increase the transmittance and retain the mirror effect.

The main purpose of the present invention is to solve the problem that conventional display devices will reduce the light transmittance when provided with external objects.

Another object of the present invention is to solve the problem that conventional display devices cannot improve the transmittance and retain the mirror effect.

To achieve the above object, the present invention provides a display device that allows external objects to be displayed, including a body formed with a space, a backlight module disposed in the space, and a display module disposed in the space. , the backlight module has a light projection surface, the display module and the backlight module are separated by a distance, the distance is long enough to allow at least one external object level to be located therein, the display module includes a transparent display structure , a first optical film provided on the side of the transparent display structure facing the light projection surface, and a second optical film provided on the side of the transparent display structure away from the light projection surface, the first optical film allows the backlight The light directly projected by the module and the light reflected by the body pass through. The second optical film allows the light from the transparent display structure to pass through and reflects an ambient light outside the body.

In one embodiment, the body has a plurality of inner walls that together with the display module define the space, and at least one of the inner walls is provided with a reflective layer.

In one embodiment, the inner walls are all provided with the reflective layer.

In one embodiment, the display module includes a touch panel located on a side of the display module away from the backlight module.

In one embodiment, the second optical film is located between the transparent display structure and the touch panel.

In one embodiment, the distance is less than or equal to 35 centimeters.

In one embodiment, the light transmittance of the second optical film is 80%, and the ambient light reflectance of the second optical film is at least 60%.

Through the foregoing implementation of the present invention, compared with the conventional ones, it has the following characteristics: the display device of the present invention is not implemented in a tightly stacked structure, and there is a gap between the display module and the backlight module to allow the external object to be placed therein . At the same time, the first optical film of the present invention can allow the light directly projected by the backlight module to pass through, and can also recycle the reflected light, thereby achieving a brightening effect, and the second optical film further has the ability to reflect the ambient light. function, whereby the present invention produces a mirror effect.

The detailed description and technical content of the present invention are described as follows with reference to the drawings:

Referring to FIGS. 1 to 5 , the present invention provides a display device 100 that allows at least one external object 200 to be displayed and can improve transmittance and reflectivity. The display device 100 includes a body 10 , a backlight module 20 , and a display module 30 . The body 10 serves as the housing of the display device 100 and forms a space 11 . The space 11 provides the backlight module 20 and the display module 30 . The display module 30 is provided therein. The backlight module 20 has a light projection surface 21 that can project a backlight light 22 outward when the backlight module 20 is activated. The display module 30 is located on one side of the backlight module 20 and is in contact with the backlight module 20 . The backlight modules 20 are separated by a spacing 31 . Among them, the separation arrangement described herein is not the distance generated when the display device 100 is decomposed, but the display module 30 is not arranged immediately adjacent to the backlight module 20. When the display device 100 is assembled, There is a gap 31 between the display module 30 and the backlight module 20 .

In order to provide the display function, the display device 100 is designed to provide the placement of the external object 200 . The length of the spacing 31 needs to be sufficient to allow the external object 200 to be located therein, that is, the length of the spacing 31 It must be greater than or equal to the length of the foreign object 200 to accommodate the foreign object 200 . In addition, the display module 30 includes a transparent display structure 32, a first optical film 33 and a second optical film 34. The transparent display structure 32 determines the operation of the display module 30. The transparent display structure 32 can be based on conductive The state changes the polarization direction of light. Taking the transparent display structure 32 as an example of a liquid crystal display, the transparent display structure 32 includes two transparent electrodes arranged at intervals, and a liquid crystal molecule layer located between the two transparent electrodes. The liquid crystal molecule layer contains a plurality of liquid crystal molecules. When some liquid crystal molecules are connected to the two transparent electrodes, they are affected by the external electric field and change their original arrangement, thereby changing the polarization direction of the light. On the contrary, when the two transparent electrodes stop being conductive, the liquid crystal molecules return to their original arrangement and cannot change the polarization direction of the light. It should be understood that the transparent display structure 32 of the present invention is not limited to the above-mentioned embodiments, and anything that can determine the working status of the display device 100 should fall within the scope of the present invention.

Following the above, the first optical film 33 is located on the side of the display module 30 facing the light projection surface 21 , and the first optical film 33 provides a polarization function. In more detail, the first optical film 33 accepts the backlight light 22 from the backlight module 20 and has a first polarization axis 332. The first optical film 33 accepts the polarization direction of the backlight light 22 and the polarization direction of the backlight light 22. Those with the same first polarization axis 332 (eg, reference numeral 221) pass through, and those in the backlight light 22 with different polarization directions from the first polarization axis 332 are rejected (eg, reference numeral 222). For example, assuming that the first polarization axis 332 is vertical, the vertical polarization direction of the backlight light 22 can pass through the first optical film 33 , but the other polarization directions of the backlight light 22 cannot pass through the first optical film 33 . Optical film 33. In addition, the first optical film 33 also receives a reflected light 12 reflected by the body 10. The reflected light 12 may be converted from the backlight light 22 when the backlight light 22 travels toward the display module 30. , part of the backlight light 22 may be blocked and reflected by the first optical film 33, or may be reflected by the external object 200. The reflected part of the backlight light 22 is reflected to the body 10 and is scattered. When the backlight light 22 is reflected, The reflected part of the backlight light 22 becomes unpolarized light again, and when it is reflected by the body 10 again, the backlight light 22 is transformed into the reflected light 12 . From the foregoing, it can be known that the reflected light 12 with the same polarization direction as the first optical film 33 (such as the reference numeral 121) can penetrate the first optical film 33, while the others cannot. The reflected light 12 cannot penetrate the first optical film 33. The first optical film 33 will be reflected to the body 10 again, and will be reflected to the first optical film 33 again after being scattered, and the cycle continues. Therefore, the first optical film 33 of the present invention not only simply accepts the backlight light 22 from the backlight module 20, but also recovers the backlight light 22 that fails to penetrate the first optical film 33 (as labeled 222) and the part of the backlight light 22 that is reflected by the external object 200, thereby improving the light extraction efficiency of the backlight module 20 and achieving a brightness enhancement effect.

The second optical film 34 is located on the side of the display module 30 away from the light projection surface 21 . The second optical film 34 is opposite to the first optical film 33 . The second optical film 34 also provides a polarization function. Specifically, the second optical film 34 accepts light from the display module 30 to pass through. The light may be generated by the display module 30 itself, or the display module 30 may receive light from the third optical film 30 . A polarized light 331 is converted by an optical film 33. It should be noted that the polarized light 331 mentioned in the present invention refers to the light coming from the first optical film 33, including the backlight light 22 whose polarization direction is the same as the first polarization axis 332 (such as reference numeral 221) , and at least one of the reflected light 12 whose polarization direction is the same as that of the first optical film 33 (such as reference numeral 121 ). In one embodiment, the second optical film 34 has a second polarization axis 341 perpendicular to the first polarization axis 332. When the light of the display module 30 is converted from the polarized light 331, the second polarization axis 341 is perpendicular to the first polarization axis 332. The optical film 34 prevents the polarized light 331 from the first optical film 33 from passing through before the display module 30 is powered on. When the display module 30 is powered on, the polarization direction of the polarized light 331 is changed. , so that the polarized light 331 can penetrate the second optical film 34 . In addition, after the second optical film 34 receives an ambient light 400 outside the body 10, the second optical film 34 can further reflect the ambient light 400 of the body 10, thereby causing the display device 100 to produce a mirror effect. In one embodiment, the light transmittance of the second optical film 34 is 80%, and the ambient light reflectivity is at least 60%.

Following the above, the implementation of the display device 100 will now be described. Assume that the backlight module 20 initially generates the backlight light 22 but the transparent display structure 32 is not powered on. At this time, the backlight light 22 travels toward the display module 30 and part of the backlight light 22 is blocked by the external object 200 The backlight light 22 is blocked and then reflected to the body 10 , while the remaining part of the backlight light 22 is not blocked by the external object 200 and travels directly toward the first optical film 33 . The first optical film 33 accepts the backlight light 22 whose polarization direction is the same as the first polarization axis 332 (such as the reference numeral 221 ), and the reflected light 12 whose polarization direction is the same as the first polarization axis 332 (such as the reference numeral 121 ) passes through, and changes the polarization direction of the backlight light 22 that is the same as the first polarization axis 332 (e.g., reference numeral 221), and the reflection light 12 that has the same polarization direction as the first polarization axis 332 (e.g., reference numeral 121). This is the polarized light 331. At this moment, since the transparent display structure 32 is not powered, the polarized light 331 cannot change the polarization direction and cannot pass through the second optical film 34 , causing the display device 100 to display a black screen and unable to display the external object 200 . At the same time, when the display device 100 displays a black screen, the second optical film 34 can still reflect the ambient light 400 and maintain a reflectivity of at least 60%, as shown in FIG. 5 . Among them, FIG. 5 depicts the mirror function of the display device 100 when it is not powered on, that is, the portrait in this figure is the mirror image displayed on the display device 100 by the user.

Following the above, once the transparent display structure 32 is powered on, the polarization direction of the polarized light 331 can be changed and pass through the second optical film 34, so that the display device 100 presents a bright screen and can display the external object. 200, as shown in Figure 4. The display device 100 in FIG. 4 can display the external object 200 and represent the information displayed by the transparent display structure 32 with sun images, square patterns, etc. It should be understood that although FIG. 4 does not illustrate the mirror function of the display device 100, after the display device 100 is powered on, the second optical film 34 also maintains the function of reflecting the ambient light 400 and provides the display device 100 with Mirror effect.

From the above, it can be seen that the display device 100 of the present invention is not implemented in a tightly stacked structure. There is a gap 31 between the display module 30 and the backlight module 20 so that the external object 200 can be placed therein. At the same time, the first optical film 33 of the present invention can allow the light directly projected by the backlight module 20 to pass through, and can also recycle the reflected light, thereby achieving a brightening effect, and the second optical film 34 can also reflect the light. The function of ambient light 400 enables the present invention to produce a mirror effect. The present invention improves the problem that conventional display devices must sacrifice reflectivity when increasing transmittance, or must reduce transmittance when increasing reflectivity.

Continuing with the above, please refer to Figures 6 and 7. In one embodiment, the body 10 has a plurality of inner walls 13. The inner walls 13 and the display module 30 jointly define the space 11. The inner walls 13 are for achieving Reflection effect, at least one of the inner walls 13 can also be provided with a reflective layer 131, the reflective layer 131 reflects the light coming from the external object 200 or the first optical film 33, for example, the reflective layer 131 can be white paint coating or mirror coating. In addition to the above, the present invention can further provide the reflective layer 131 on the inner walls 13, thereby improving the reflective ability of the body 10. Furthermore, in order to avoid that the backlight light 22 cannot specifically provide display illumination for the external object 200, the distance 31 between the backlight module 20 and the display module 30 is less than or equal to 35 centimeters.

On the other hand, please refer to FIG. 8 . In one embodiment, the display device 100 may further have a touch function. The display module 30 includes a touch panel 40 , and the touch panel 40 is provided on the display module 30 On the side away from the backlight module 20, the touch panel 40 can provide touch control based on quantum tunneling, capacitance, resistance, etc., and the user touches the touch panel 40 to produce changes in the signal, thereby achieving control purposes. Furthermore, in this embodiment, the second optical film 34 is provided between the transparent display structure 32 and the touch panel 40 .

In summary, the above is only a preferred embodiment of the present invention, and it should not be used to limit the scope of the present invention. That is, all equivalent changes and modifications made based on the patent scope of the present invention should still fall within the scope of the patent of the present invention.

100:Display device

10:Ontology

11: Space

12:Reflect light

121:Reflect light

13:Inner wall

131: Reflective layer

20:Backlight module

21: Projection surface

22:Backlight light

221:Backlight light

222:Backlight light

30:Display module

31: spacing

32:Transparent display structure

33:First optical film

331:Polarized light

332: First polarization axis

34: Second optical film

341: Second polarization axis

40:Touch panel

200:External objects

400:Ambient light

Figure 1 is a schematic cross-sectional view of the structure of the first embodiment of the present invention. Figure 2 is a schematic diagram of the first optical film according to the first embodiment of the present invention. Figure 3 is a schematic diagram of the second optical film according to the first embodiment of the present invention. Figure 4 is a schematic diagram of the display function of the first embodiment of the present invention. Figure 5 is a schematic diagram of the mirror function of the first embodiment of the present invention. Figure 6 is a schematic top view of the structure of the second embodiment of the present invention. Figure 7 is a schematic cross-sectional view along line A-A in Figure 6. Figure 8 is a schematic cross-sectional view of the structure of the third embodiment of the present invention.

100:Display device

10:Ontology

11: Space

13:Inner wall

20:Backlight module

21: Projection surface

30:Display module

31: spacing

32:Transparent display structure

33:First optical film

34: Second optical film

200:External objects

Claims (7)

A display device that allows external objects to be displayed, including: a body formed into a space; a backlight module located in the space and having a projection surface; a display module located in the space and connected to the backlight module The groups are separated by a spacing, and the spacing is long enough to allow at least one external object level to be located therein. The display module includes a transparent display structure, and a first optical element located on the side of the transparent display structure facing the light-emitting surface. film, and a second optical film provided on the side of the transparent display structure away from the light projection surface; wherein, the first optical film has a first polarization axis, and the second optical film has an axis consistent with the first polarization axis. With a vertical second polarization axis, the first optical film allows the backlight module to directly project light with the same polarization direction as the first polarization axis, and light reflected by the body and with the same polarization direction as the first polarization axis. The second optical film allows light from the transparent display structure and has the same polarization direction as the second polarization axis to pass through, and reflects an ambient light outside the body. The display device that allows external objects to be displayed as described in claim 1, wherein the body has a plurality of inner walls that jointly define the space with the display module, and at least one of the inner walls is provided with a reflective layer. The display device that allows external objects to be displayed as described in claim 2, wherein the inner walls are all provided with the reflective layer. The display device that allows external objects to be displayed as described in claim 1, wherein the display module includes a touch panel located on a side of the display module away from the backlight module. The display device that allows external objects to be displayed as described in claim 4, wherein the second optical film is located between the transparent display structure and the touch panel. The display device that allows external objects to be displayed as described in claim 1, wherein the distance is less than or equal to 35 centimeters. The display device that allows external objects to be displayed as described in claim 1, wherein the light transmittance of the second optical film is 80%, and the ambient light reflectivity of the second optical film is at least 60%.

Images