TWI808837B - Display device - Google Patents

Abstract

A display device having a pixel region and including a light emitting panel and a first optical layer is provided. The light emitting panel includes a micro light emitting element, and the micro light emitting element is configured to provide a first light beam. The first optical layer is disposed on a transmission path of the first light beam, and the first optical layer includes a first filter layer and a first opening. The first filter layer is configured to reflect the first light beam. The first opening is configured to cause the first light beam to penetrate therethrough. The first light beam is transmitted to the first opening and then leaves the display device through the pixel region.

Description

display device

The present invention relates to an optical device, and in particular to a display device.

In current display devices, a full-color pixel is usually composed of three primary colors (R, G, B) sub-pixels, and then the ratio of the three primary-color light beams provided by each sub-pixel is adjusted according to the target color to form various color lights. However, due to the limitations of existing manufacturing processes, the color conversion quantum dots used to form different converted light beams need to be arranged at intervals to avoid mixing of materials of different color conversion quantum dots. Therefore, the areas of independent three primary color sub-pixels cannot be closely arranged, and the independent display of the three primary colors can still be seen at close range or under a microscope. In this way, the obvious light mixing effect can only be felt outside a certain display distance. In addition, since the areas of the sub-pixels cannot be closely arranged, it is easy to have a door effect (Door Effect) in use, which affects the display quality, and then makes the user experience poor and uncomfortable.

The "Prior Art" paragraph is only used to help understand the content of the present invention, so the content disclosed in the "Prior Art" paragraph may contain some conventional technologies that do not constitute the knowledge of those with ordinary skill in the art. The content disclosed in the "Prior Art" paragraph does not mean that the content or the problems to be solved by one or more embodiments of the present invention have been known or recognized by those with ordinary knowledge in the technical field before the application of the present invention.

The present invention provides a display device, which has the effects of increasing pixel density and reducing the size of full-color pixels, and can realize color mixing of each sub-pixel in a pixel area, thereby providing good display quality.

To achieve one or part or all of the above objectives or other objectives, an embodiment of the present invention provides a display device. The display device has a pixel area, including a light-emitting panel and a first optical layer. The light emitting panel includes micro light emitting elements, and the micro light emitting elements are used to provide the first light beam. The first optical layer is disposed on the transmission path of the first light beam, and the first optical layer includes a first filter layer and a first opening, the first filter layer is used for reflecting the first light beam, and the first opening is used for penetrating the first light beam, and the first light beam is delivered to the first opening and leaves the display device through the pixel area.

In an embodiment of the present invention, the above-mentioned light-emitting panel further includes a wavelength conversion layer, the wavelength conversion layer is arranged on the transmission path of the first light beam, and is arranged between the micro-light-emitting element and the first optical layer. The wavelength conversion layer includes a wavelength conversion region and a light transmission region.

In an embodiment of the present invention, the above-mentioned display device further includes a second optical layer disposed on the transmission path of the first light beam and the second light beam, and disposed between the light-emitting panel and the first optical layer. The second optical layer includes a second filter layer and a second opening. The second filter layer is used to allow the second light beam to pass through and reflect the first light beam. The second opening is provided corresponding to the light-transmitting area for the first light beam to pass through.

In an embodiment of the present invention, the above-mentioned display device further includes a light transmission layer disposed between the second optical layer and the first optical layer, wherein the first light beam passing through the second opening enters the light transmission layer and is reflected by the first filter layer and the second filter layer, and is transmitted to the first opening and leaves the light transmission layer.

In an embodiment of the present invention, the area of the orthographic projection of the above-mentioned first opening on the light-emitting panel does not at least partially overlap with the area of the light-transmitting region in the light-emitting panel.

In an embodiment of the present invention, the above-mentioned display device further includes a light transmission layer disposed between the light-emitting panel and the first optical layer, wherein the light-emitting panel further includes a back plate, and the first light beam is reflected by the first filter layer and the back plate after entering the light transmission layer, and is transmitted to the first opening and leaves the light transmission layer.

In an embodiment of the present invention, the above-mentioned pixel area includes a plurality of sub-pixel areas, the micro light-emitting element is a first micro-light-emitting element, and the light-emitting panel further includes a second micro-light-emitting element, the second micro-light-emitting element is used to provide a second light beam, the first filter layer is used to transmit the second light beam, the second light beam passing through the first filter layer leaves the display device through one of the sub-pixel areas of the pixel area, and each sub-pixel area corresponds to the first light beam and the second light beam.

In an embodiment of the present invention, the above-mentioned display device further includes a third optical layer, disposed on the transmission path of the first light beam and the second light beam, and disposed between the light-emitting panel and the first optical layer, the third optical layer includes a third filter layer and a third opening, and the first filter layer is used to reflect the first light beam and allow light beams other than the first light beam to pass through, and the third filter layer is used to reflect the second light beam and allow light beams other than the second light beam to pass through.

In an embodiment of the present invention, the above-mentioned display device further includes a plurality of light transmission layers, wherein any light transmission layer is located between any two of the first optical layer, the third optical layer, and the light emitting panel, and the first light beam leaves at least part of the light transmission layer through the first opening of the first optical layer, and the second light beam leaves at least part of the light transmission layer through the second opening of the third optical layer.

In an embodiment of the present invention, the above-mentioned display device further includes a plurality of microstructure layers, each having a microstructure region, wherein the microstructure regions of each microstructure layer are respectively disposed corresponding to the first opening and the second opening.

In an embodiment of the present invention, the above-mentioned range of the orthographic projection of the first opening on the light-emitting panel does not overlap at least part of the range of the first micro-light emitting element on the light-emitting panel, and the range of the orthographic projection of the second opening on the light-emitting panel does not overlap at least part of the range of the second micro-light-emitting element on the light-emitting panel.

In an embodiment of the present invention, the above-mentioned display device further includes a microstructure layer having a microstructure area, wherein the first optical layer is located between the microstructure layer and the light emitting panel, and the microstructure area is disposed corresponding to the first opening.

In an embodiment of the present invention, the above-mentioned display device further includes an optical film layer covering the light-emitting panel and disposed between the light-emitting panel and the first optical layer.

Based on the above, in the display device according to an embodiment of the present invention, the sub-pixel regions used for displaying partial colors are defined by the openings provided in the optical layer, and thus the relative positional relationship between the multiple sub-pixel regions can be controlled. Furthermore, color mixing of each sub-pixel in one pixel area can be achieved thereby, and multiple pixel areas of the display device can be closely arranged, so that the display device has effects such as high pixel density, small pixel size, and high resolution, thereby providing good display quality.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. Accordingly, the directional terms used are for the purpose of illustration and not for the purpose of limiting the invention.

FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to FIG. 1 , the display device 100 includes a light emitting panel 110 , a light transmission layer 120 , a first optical layer 130 and a microstructure layer 140 . The light transmission layer 120 is disposed between the light emitting panel 110 and the first optical layer 130 , and the first optical layer 130 is located between the microstructure layer 140 and the light emitting panel 110 .

Specifically, in this embodiment, the light emitting panel 110 may include one or more micro light emitting devices WMD, and each micro light emitting device WMD is used to provide the first light beam L respectively. The micro-light emitting device WMD may be a Light-emitting Diode (LED), a Laser Diode (LD) or a combination thereof, or other suitable light sources for emitting light of various colors, and the present invention is not limited thereto. For example, in this embodiment, the micro light emitting device WMD is a white light micro light emitting device, which may include micro light emitting diodes for emitting blue light, red light, and green light. The first light beam L can be a white light beam or other colored light beams formed by adjusting the light mixing ratio by a controller (not shown in the figure). In other embodiments, the micro-light emitting device WMD can be combined with other optical components to provide the required first light beam L according to usage requirements. It should be noted that, in FIG. 1 , each micro light emitting device WMD only emits one first light beam L, but in actual application, each micro light emitting device WMD can emit multiple first light beams L.

More specifically, as shown in FIG. 1 , the first optical layer 130 is disposed on the transmission path of the first light beam L, and the first optical layer 130 includes a first filter layer 131 and a first opening 132, the first filter layer 131 is used to reflect the first light beam L, and the first opening 132 is used to allow the first light beam L to pass through. In this embodiment, the first optical layer 130 is, for example, a reflective layer having a first opening 132 . In addition, the light-emitting panel 110 also includes a backplane B. As shown in FIG. More specifically, the light transmission layer 120 is disposed between the backplane B and the first optical layer 130 . As shown in FIG. 1 , the first light beam L can be reflected back and forth between the first filter layer 131 and the back plate B after entering the light transmission layer 120 , and is delivered to the first opening 132 to leave the light transmission layer 120 .

In this embodiment, the microstructure layer 140 has a microstructure region MR, and the microstructure region MR is disposed corresponding to the first opening 132 . A plurality of microstructures (not shown) are disposed in the microstructure region MR, which can be used to adjust the light emitting angle of the first light beam L. As shown in FIG. The microstructure can be, for example, a color filter or a micro lens. As shown in FIG. 1 , the first light beam L exiting the light transmission layer 120 through the first opening 132 can pass through the microstructure and emit light in the forward direction, thereby improving the brightness of the display device 100 in the forward direction. In one embodiment, there is a substrate (not shown in the figure) between the microstructure layer 140 and the first optical layer 130 , and the first light beam L passing through the first opening 132 can enter the microstructure layer 140 after passing through the substrate.

In this embodiment, the first light beam L is the display light beam of the display device 100 . The pixel area PX on the microstructure layer 140 is the light emitting area of the first light beam L, and the pixel area PX corresponds to the first opening 132 and the microstructure area MR. That is to say, the first light beam L is delivered to the first opening 132 and leaves the display device 100 through the pixel region PX, thereby providing a display light beam.

FIG. 2 is a schematic structural diagram of a display device according to another embodiment of the present invention. FIG. 3A is a schematic front view of a pixel area of the display device in FIG. 2 . FIG. 3B is an enlarged schematic view of a pixel area of the display device shown in FIG. 3A . Referring to FIG. 2 , the display device 200 of this embodiment is similar to the display device 100 of FIG. 1 , and the differences between the two are as follows. In this embodiment, the miniature light emitting device BD of the light emitting panel 210 is embodied as a blue micro light emitting device, and the first light beam BL can be a blue light beam, wherein the emission wavelength of the first light beam BL ranges from 430 nm to 480 nm, for example. The first optical layer 230 is, for example, a bandpass filter having a first opening 232 . The first filter layer 231 of the first optical layer 230 is used for reflecting the first light beam BL and allowing light beams other than the first light beam BL to pass through. In addition, the display device 200 can optionally be provided with an optical film layer MS, which covers the light-emitting panel 210, that is, the optical film layer MS is disposed between the light-emitting panel 210 and the first optical layer 230, and can be used as a protective layer.

Further, as shown in FIG. 2, in this embodiment, the light-emitting panel 210 further includes a wavelength conversion layer 211, and the wavelength conversion layer 211 is disposed on the transmission path of the first light beam BL, and is disposed between the micro light-emitting element BD and the first optical layer 230. More specifically, in this embodiment, the wavelength conversion layer 211 includes a wavelength conversion region WR, a light transmission region TR, and a plurality of isolation structures BM, wherein the isolation structures BM are used to define the boundaries of the wavelength conversion region WR and the transmission region TR. The material of the isolation structure BM may include black resin or light-absorbing material for absorbing or blocking the first light beam BL.

In this embodiment, the wavelength conversion region WR is used to convert (Convert) the first light beam BL into the second light beam RL, GL. The light transmission region TR is used to transmit the first light beam BL. For example, the wavelength conversion layer 211 has a first wavelength conversion layer 211R, a second wavelength conversion layer 211G and a transparent layer 211B, wherein the first wavelength conversion layer 211R and the second wavelength conversion layer 211G are arranged corresponding to the wavelength conversion region WR, and the transparent layer 211B is arranged corresponding to the transparent region TR. Moreover, as shown in FIG. 2 , the first wavelength conversion layer 211R, the second wavelength conversion layer 211G, and the light-transmitting layer 211B are arranged at intervals in an arrangement direction of the wavelength conversion layer 211 . Specifically, a plurality of isolation structures BM are respectively disposed between the first wavelength conversion layer 211R, the second wavelength conversion layer 211G and the transparent layer 211B. In one embodiment, the first wavelength conversion layer 211R, the second wavelength conversion layer 211G, and the transparent layer 211B can be designed according to usage requirements, for example, the first wavelength conversion layer 211R, the second wavelength conversion layer 211G, and the transparent layer 211B can be patterned. Alternatively, the first wavelength conversion layer 211R, the second wavelength conversion layer 211G, and the transparent layer 211B may be arranged in a matrix on the wavelength conversion layer 211 on the plane of the wavelength conversion layer 211 perpendicular to the light emitting direction.

In this embodiment, the materials of the first wavelength conversion layer 211R and the second wavelength conversion layer 211G are, for example, quantum dot materials or nanoscale phosphors, and are used to convert the first light beam BL into the second light beam RL and the second light beam GL respectively, wherein the emission wavelengths of the second light beams RL and GL are different from the light emission wavelengths of the first light beam BL. For example, in this embodiment, the emission wavelengths of the second light beams RL and GL are, for example, in the range of 580 nm to 650 nm or in the range of 490 nm to 540 nm, which can respectively form the red light part or the green light part of the display light beam provided by the display device 200. In this embodiment, the material of the transparent layer 211B is, for example, an optical material or an optical glue that allows the first light beam BL to pass through directly. In this embodiment, the first light beam BL can be directly used as blue light for display. However, in other embodiments, in order to improve the color purity of blue light (that is, to narrow the distribution range of blue light wavelengths) or to convert blue light in the case of using other light sources, the wavelength conversion layer 211 can also select a blue light wavelength conversion material in the light-transmitting layer 211B to obtain blue light that meets the requirements. In an embodiment, a filter may also be provided between the micro light emitting element BD and the wavelength conversion layer 211 to allow the first light beam BL of a specific wavelength to pass through, so as to improve the color purity of the first light beam BL.

In addition, in this embodiment, the display device 200 further includes a second optical layer 250, disposed on the transmission path of the first light beam BL and the second light beam RL, GL, disposed between the light emitting panel 210 and the first optical layer 230, and the light transmission layer 120 is disposed between the second optical layer 250 and the first optical layer 230. Further, the second optical layer 250 includes a second filter layer 251 and a second opening 252. The second filter layer 251 is used to pass through the second light beams RL and GL and reflect the first light beam BL. The second opening 252 is set corresponding to the light transmission region TR and is used to pass through the first light beam BL. Moreover, the first filter layer 231 of the first optical layer 230 can be used to pass through the second light beams RL and GL. Thus, as shown in FIG. 2 , the first light beam BL passing through the second opening 252 enters the light transmission layer 120 and is reflected back and forth by the first filter layer 231 and the second filter layer 251 , and is delivered to the first opening 232 and then leaves the light transmission layer 120 . The second light beams RL and GL will not be absorbed or reflected by the first optical layer 230 and the second optical layer 250, and the second light beams RL and GL can directly pass through the second filter layer 251 of the second optical layer 250 and the first filter layer 231 of the first optical layer 230 to emerge. That is to say, in this embodiment, the first optical layer 230, the light transmission layer 120, and the second optical layer 250 form a layered waveguide structure, so that light of a specific wavelength band (that is, the first light beam BL) can only pass through a specific position (that is, the first opening 232 or the second opening 252).

In this embodiment, since the three primary color light beams in the display light beams of the display device 200 are respectively composed of the first light beam BL and the second light beams RL, GL, the pixel area PX of the display device 200 includes a plurality of sub-pixel areas PB, PG, PR, and these sub-pixel areas PB, PG, PR correspond to the light emitting areas of the first light beam BL and the second light beams RL, GL respectively. That is to say, the sub-pixel regions PG and PR for displaying red light or green light substantially correspond to the light emitting regions of the second light beams RL and GL, and the sub-pixel region PB for displaying blue light substantially corresponds to the first opening 232 .

In this way, in this embodiment, the first light beam BL and the second light beam RL, GL leaving the display device 200 corresponding to each sub-pixel region PB, PG, PR can achieve the light mixing effect, so as to provide the desired display light beam.

Furthermore, in this embodiment, since the first light beam BL needs to pass through the first opening 232 to leave the light transmission layer 120 and emit light, the sub-pixel area PB for displaying blue light is essentially defined according to the position of the first opening 232. Furthermore, the outline of the first opening 232 can also determine the shape of the sub-pixel area PB for displaying blue light. In this embodiment, the position, size, and shape of the first opening 232 and the second opening 252 are not limited, but the position, size, and shape of the first opening 232 and the second opening 252 can be designed according to the actual needs of the product, so that the first light beam BL and the second light beam RL, GL corresponding to the sub-pixel areas PB, PG, and PR leaving the display device 200 can achieve the required light mixing effect, or the boundary of the full-color pixel area (i.e., the pixel area PX) can also be adjusted accordingly, and then control the picture. The effect of size control or miniaturization of the pixel area PX. In this way, by setting the first opening 232, the position of the sub-pixel area PB can be adjusted to achieve color mixing of each sub-pixel in one pixel area, thereby providing good display quality.

For example, as shown in FIG. 2 , FIG. 3A and FIG. 3B , the range of the orthographic projection of the first opening 232 on the light-emitting panel 210 does not at least partially overlap the range of the light-transmitting region TR in the light-emitting panel 210 , so that the sub-pixel region PB displaying blue light deviates from the corresponding position of the light-transmitting region TR of the wavelength conversion layer 211. Moreover, as shown in FIG. 3A , the range of the orthographic projection of the first opening 232 on the light emitting panel 210 partially overlaps the range of the wavelength conversion region WR for forming the second light beams RL and GL in the light emitting panel 210 . For example, as shown in FIG. 2, FIG. 3A and FIG. 3B, the sub-pixel region PG for displaying green light can substantially overlap with the sub-pixel region PB for displaying blue light to form a blue light region PP. In this way, color mixing of each sub-pixel in one pixel region can be realized.

On the other hand, by providing the first opening 232 , the display device 200 can also have effects such as increasing the pixel density and reducing the full-color pixel size. Hereinafter, it will be further explained with reference to FIG. 4 to FIG. 5 .

4 to 5 are schematic front views of different pixel areas of the display device shown in FIG. 2 . As shown in FIG. 4 to FIG. 5 , the range of the orthographic projection of the first opening 232 of the first optical layer 230 on the light emitting panel 210 at least partially overlaps the range of the orthographic projection of the isolation structure BM on the light emitting panel 210 . That is to say, the sub-pixel area PB for displaying blue light substantially covers a part of the area corresponding to the isolation structure BM that cannot be used for emitting light in the current technology. In this way, the sub-pixel regions PB, PG, PR can be closely arranged, and the size of the pixel region PX can be reduced, thereby realizing the effects of high pixel density, small pixel size and high resolution. For example, as shown in FIG. 5 , when the range of the orthographic projection of the first opening 232 of the first optical layer 230 on the light-emitting panel 210 and the boundary of at least any one of the first wavelength conversion layer 211R and the second wavelength conversion layer 211G in the light-emitting panel 210 are adjacent to each other, the sub-pixel area PB for displaying blue light substantially covers the range corresponding to the area of the isolation structure BM between the first wavelength conversion layer 211R and the second wavelength conversion layer 211G, and the sub-pixel area for displaying blue light The pixel area PB, the sub-pixel area PG for displaying green light, and the sub-pixel area PR for displaying red light can be closely adjacent to each other. In this way, the display device 200 can achieve high sub-pixel density and high resolution, thereby providing good display quality.

In this way, the first opening 232 provided in the first optical layer 230 defines the sub-pixel region PB for displaying part of the light beam, and the first opening 232 can control the relative positional relationship between the plurality of sub-pixel regions PB, PG, PR. Furthermore, color mixing of each sub-pixel in one pixel area can be realized, and the multiple sub-pixel areas PB, PG, and PR of the display device can be closely arranged, so that the display device 200 has the effects of high pixel density, small pixel size, and high resolution, thereby providing good display quality.

FIG. 6 is a schematic structural diagram of a display device according to another embodiment of the present invention. Please refer to FIG. 6 , the display device 300 of this embodiment is similar to the display device 200 of FIG. 2 , and the differences between the two are as follows. In this embodiment, the micro light emitting element of the light emitting panel 310 is a first micro light emitting element BMD, and the first micro light emitting element BMD is, for example, a blue light micro light emitting element, and the light emitting panel 310 further includes a plurality of second micro light emitting elements RMD, GMD. That is to say, the light emitting panel 310 can omit the arrangement of the wavelength conversion layer 211 in FIG. 2 through the arrangement of the first micro light emitting device BMD and the second micro light emitting device RMD, GMD.

On the other hand, in this embodiment, the display device 300 further includes a plurality of third optical layers 350R, 350G, and the third optical layers 350R, 350G have different third openings 352R, 352G respectively, and the third filter layers 351R, 351G of the third optical layers 350R, 350G can respectively correspond to different second light beams RL, GL provided by different second micro light-emitting devices RMD, GMD to provide different optical functions, so as to define different sprites respectively prime area PG, PR.

For example, as shown in FIG. 6 , the third filter layer 351R of the third optical layer 350R is used to reflect the second light beam RL which is red light and transmit light beams other than red light, while the third filter layer 351G of the third optical layer 350G is used to reflect the second light beam GL which is green light and to allow light beams other than green light to pass through. In this way, the second light beam RL as red light can only emit light from the third opening 352R of the third optical layer 350R, and the second light beam GL as green light can only emit light from the third opening 352G of the third optical layer 350G. In this way, the sub-pixel regions PG, PR for displaying red light or green light can also be substantially defined by different third openings 352R, 352G. That is to say, in this embodiment, the third filter layers 351R, 351G of the third optical layers 350R, 350G can respectively reflect the second light beams RL, GL, and respectively transmit light beams other than the second light beams RL, GL. In this way, a plurality of light transmission layers 320R for transmitting the second light beam RL, light transmission layers 320G for transmitting the second light beam GL, and light transmission layers 320B for transmitting the second light beam BL may be formed.

For example, the light transmission layer 320R may be a multi-layer structure formed by optical layers disposed between the backplane B of the light emitting panel 310 and the third optical layer 350R (that is, the light transmission layer 120 and the optical film layer MS between the second micro light emitting device RMD and the third optical layer 350R), so that the second light beam RL from the second micro light emitting device RMD is reflected back and forth between the third filter layer 351R and the backplane B, and passes through the third opening 352R of the third optical layer 350R After leaving, it passes through other optical layers (ie, the light transmission layer 120 and the microstructure layer 140 between the third optical layer 350R and the uppermost microstructure layer 140, the third optical layer 350G, and the first optical layer 230) and emits light from the sub-pixel region PR.

Similarly, the light transmission layer 320G may be a multi-layer structure formed by the optical layers disposed between the backplane B of the light emitting panel 310 and the third optical layer 350G (that is, the light transmission layer 120 and the microstructure layer 140, the optical film layer MS, and the third optical layer 350R between the second micro light emitting device GMD and the third optical layer 350G), so that the second light beam GL from the second micro light emitting device GMD is reflected and transmitted back and forth between the third filter layer 351G and the backplane B. After the third opening 352G of the third optical layer 350G leaves, it passes through other optical layers (ie, the light transmission layer 120 and the microstructure layer 140 located between the third optical layer 350G and the uppermost microstructure layer 140, and the first optical layer 230) and emits light from the sub-pixel region PG.

Similarly, the light transmission layer 320B can be a multilayer structure formed by the optical layers disposed between the backplane B of the light emitting panel 310 and the first optical layer 230 (that is, the light transmission layer 120 and the microstructure layer 140 between the first micro light emitting device BMD and the first optical layer 230, the optical film layer MS, the third optical layer 350R, and the third optical layer 350G), so that the first light beam BL from the first micro light emitting device BMD travels back and forth between the first filter layer 231 and the backplane B Reflective transmission, the first opening 232 of the first optical layer 230 passes through other optical layers (ie, the uppermost microstructure layer 140 and the light transmission layer 120 ) and emits light from the sub-pixel region PB.

In addition, in this embodiment, the first opening 232 and the third opening 352R, 352G are not limited. For example, as shown in FIG. 6 , one or more third openings 352R, 352G, and the first opening 232 can be provided according to actual needs, and the present invention is not limited thereto. On the other hand, in this embodiment, the stacking order of the first optical layer 230 and the third optical layers 350R, 350G on the light emitting panel 310 is not limited either. The first optical layer 230 and the third optical layer 350R, 350G can be stacked in any order, so that the first optical layer 230 and the third optical layer 350R, 350G can respectively form light transmission layers 320R, 320G, 320B with the optical layers between the backplane B.

In addition, in this embodiment, the display device 300 also has a plurality of microstructure layers 140 , and each microstructure layer 140 has a microstructure region MR provided with a plurality of microstructures. The microstructure regions MR of each microstructure layer 140 are respectively disposed corresponding to the first opening 232 and the third openings 352R, 352G. In this way, as shown in FIG. 6 , the first light beam BL exiting the light transmission layer 320B through the first opening 232 can pass through the corresponding microstructure and emit light in the forward direction, while the second light beams RL and GL leaving the light transmission layer 320R and 320G through the third openings 352R and 352G can also pass through the microstructure of the corresponding microstructure region MR and then emit light in the forward direction, thereby increasing the forward luminance of the display device 300 .

Moreover, as shown in FIG. 6, in this embodiment, the sub-pixel region PB for displaying blue light is substantially defined by the first opening 232, and the sub-pixel regions PR and PG for displaying red light or green light are substantially defined by different third openings 352R and 352G. In this way, by arranging the positions of the first opening 232 and the third opening 352R and 352G, the relative positional relationship between the multiple sub-pixel regions PB, PG, and PR can also be controlled, thereby realizing the realization of each sub-pixel Mixing colors in one pixel area, or making the multiple pixel areas PB, PG, PR of the display device closely arranged, so that the display device 300 has the effect of high pixel density, small pixel size and high resolution, thereby providing good display quality. For example, the first opening 232 and the third openings 352R, 352G are closely arranged at the relative positions of the orthographic projection of the light-emitting panel 310, so that the pixel size of the display device 300 can be reduced, and different sub-pixel regions PB, PG, PR of the display device 300 can be closely arranged. Alternatively, the position, size and shape of the first opening 232 and the third opening 352R, 352G can be designed according to the actual needs of the product, so that the first light beam BL and the second light beam RL, GL corresponding to the sub-pixel areas PB, PG, PR leaving the display device 300 can achieve the required light mixing effect, or the boundary of the full-color pixel area (i.e., the pixel area PX) can be adjusted to achieve the effect of controlling the size of the pixel area PX or miniaturization. In this way, the display device 300 can also achieve effects and advantages similar to those of the aforementioned display device 200 , which will not be repeated here.

In addition, please refer to FIG. 2 and FIG. 6 at the same time. In one embodiment, the structure of the second optical layer 250 as shown in FIG. 2 can also be added between the third optical layer 350G shown in FIG. or the second opening 252) through. Specifically, after the first light beam BL from the first micro light emitting device BMD passes through the second opening 252 , it will reflect back and forth between the first filter layer 231 and the second filter layer 251 , and leave the light transmission layer 320B through the first opening 232 . Similarly, a corresponding optical layer structure can also be provided for the third optical layer 350R ( 350G ), so that the light transmission layer 320R ( 320G) is a layered waveguide structure composed of the third optical layer 350R ( 350G ) and its corresponding optical layer and other optical layers in between, so that light of a specific wavelength band (that is, the second light beam RL, GL ) can only enter or leave the light transmission layer 320R ( 320G) through a specific position. Specifically, the optical layer corresponding to the third optical layer 350R is, for example, located between the light-emitting panel 310 and the third optical layer 350R. After the second light beam RL from the second micro light-emitting device RMD passes through the opening of the optical layer corresponding to the third optical layer 350R, it will reflect back and forth between the filter layer of the optical layer corresponding to the third optical layer 350R and the third filter layer 351R, and leave the light transmission layer 320R through the third opening 352R. The optical layer corresponding to the third optical layer 350G is, for example, located between the third optical layer 350R and the third optical layer 350G. After passing through the opening of the optical layer corresponding to the third optical layer 350G, the second light beam GL from the second micro light-emitting device GMD will be reflected back and forth between the filter layer of the optical layer corresponding to the third optical layer 350G and the third filter layer 351G, and leave the light transmission layer 320G through the third opening 352G. The aforementioned effects and advantages can still be achieved, so details will not be repeated here.

To sum up, in the display device according to an embodiment of the present invention, the sub-pixel regions for displaying partial colors are defined by the openings provided in the optical layer, and the relative positional relationship among the multiple sub-pixel regions is controlled by the openings. Furthermore, color mixing of each sub-pixel in one pixel area can be realized, and multiple pixel areas of the display device can be closely arranged, so that the display device has high pixel density, small pixel size and high resolution, thereby providing good display quality.

But those described above are only preferred embodiments of the present invention, and should not limit the scope of the present invention with this, that is, all simple equivalent changes and modifications made according to the scope of the patent application for the present invention and the contents of the description of the invention still belong to the scope covered by the patent of the present invention. In addition, any embodiment or scope of claims of the present invention does not need to achieve all the objectives or advantages or features disclosed in the present invention. In addition, the abstract and the title are only used to assist in the search of patent documents, and are not used to limit the scope of rights of the present invention. In addition, terms such as "first" and "second" mentioned in this specification or the patent application are only used to name elements or to distinguish different embodiments or ranges, and are not used to limit the upper limit or lower limit of the number of elements.

100, 200, 300: display device 110, 210, 310: light-emitting panels 120, 320B, 320G, 320R: optical transmission layer 130, 230: the first optical layer 131, 231: the first filter layer 132, 232: the first opening 140: microstructure layer 211: wavelength conversion layer 211R: the first wavelength conversion layer 211G: second wavelength conversion layer 211B: Transparent layer 250: second optical layer 251: Second filter layer 252: second opening 350R, 350G: the third optical layer 351R, 351G: the third filter layer 352R, 352G: the third opening B: Backplane BD, WMD: miniature light-emitting components BL, L: first beam BM: isolation structure BMD: the first miniature light-emitting device GMD, RMD: the second miniature light-emitting device GL, RL: second beam MR: Microstructure Region MS: Optical film layer PB, PG, PR: sub-pixel area PX: pixel area TR: Translucent area WR: wavelength conversion region

FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention. FIG. 2 is a schematic structural diagram of a display device according to another embodiment of the present invention. FIG. 3A is a schematic front view of a pixel area of the display device in FIG. 2 . FIG. 3B is an enlarged schematic view of a pixel area of the display device shown in FIG. 3A . 4 to 5 are schematic front views of different pixel areas of the display device shown in FIG. 2 . FIG. 6 is a schematic structural diagram of a display device according to another embodiment of the present invention.

200: display device

120: light transmission layer

140: microstructure layer

210: Luminous panel

211: wavelength conversion layer

211R: the first wavelength conversion layer

211G: second wavelength conversion layer

211B: Transparent layer

230: the first optical layer

231: the first filter layer

232: first opening

250: second optical layer

251: Second filter layer

252: second opening

BD: Miniature Light-Emitting Components

BL: First Beam

BM: isolation structure

GL, RL: second beam

MR: Microstructure Region

MS: Optical film layer

PB, PG, PR: sub-pixel area

PX: pixel area

TR: Translucent area

WR: wavelength conversion region

Claims (13)

A display device has a pixel area, including: A light-emitting panel, including a micro-light-emitting element for providing a first light beam; and A first optical layer is arranged on the transmission path of the first light beam, and the first optical layer includes a first filter layer and a first opening, the first filter layer is used to reflect the first light beam, the first opening is used to make the first light beam pass through, the first light beam is delivered to the first opening and leaves the display device through the pixel area. The display device according to claim 1, wherein the light-emitting panel further includes a wavelength conversion layer, the wavelength conversion layer is arranged on the transmission path of the first light beam, and is arranged between the micro light-emitting element and the first optical layer, the wavelength conversion layer includes a wavelength conversion region and a light transmission region, the wavelength conversion region is used to convert the first light beam into a second light beam, the light transmission region is used to make the first light beam pass through, the first filter layer is used to make the second light beam pass through, the pixel area includes a plurality of sub-pixel areas, and the second light passing through the first filter layer The light beam leaves the display device through one of the sub-pixel regions of the pixel region. The display device as described in claim 2, further comprising: A second optical layer is arranged on the transmission path of the first light beam and the second light beam, and is arranged between the light-emitting panel and the first optical layer. The second optical layer includes a second filter layer and a second opening. The second filter layer is used to transmit the second light beam and reflect the first light beam. The second opening is arranged corresponding to the light-transmitting area for the first light beam to pass through. The display device as described in claim 3, further comprising: A light transmission layer is disposed between the second optical layer and the first optical layer, wherein the first light beam passing through the second opening enters the light transmission layer and is reflected by the first filter layer and the second filter layer, and is transmitted to the first opening and leaves the light transmission layer. The display device according to claim 2, wherein the range of the orthographic projection of the first opening on the light-emitting panel does not at least partially overlap with the range of the light-transmitting region in the light-emitting panel. The display device as described in claim 1, further comprising: A light transmission layer is disposed between the light emitting panel and the first optical layer, wherein the light emitting panel further includes a back plate, the first light beam is reflected by the first filter layer and the back plate after entering the light transmission layer, and is transmitted to the first opening and leaves the light transmission layer. The display device according to claim 1, wherein the pixel area includes a plurality of sub-pixel areas, the micro light emitting element is a first micro light emitting element, and the light emitting panel further includes a second micro light emitting element, the second micro light emitting element is used to provide a second light beam, the first filter layer is used to pass the second light beam, the second light beam passing through the first filter layer leaves the display device through one of the sub pixel areas of the pixel area, and each of the sub pixel areas corresponds to the first light beam and the second light beam. The display device as described in claim 7, further comprising: A third optical layer is arranged on the transmission path of the first light beam and the second light beam, and is arranged between the light-emitting panel and the first optical layer. The third optical layer includes a third filter layer and a third opening. The first filter layer is used to reflect the first light beam and allow light beams other than the first light beam to pass through. The third filter layer is used to reflect the second light beam and allow colored light other than the second light beam to pass through. The display device as described in claim 8, further comprising: A plurality of light-transmitting layers, wherein any one of the light-transmitting layers is located between any two of the first optical layer, the third optical layer, and the light-emitting panel, and the first light beam leaves at least part of the light-transmitting layers through the first opening of the first optical layer, and the second light beam leaves at least part of the light-transmitting layers through the third opening of the third optical layer. The display device as described in claim 8, further comprising: A plurality of microstructure layers each have a microstructure area, wherein the microstructure area of each of the microstructure layers is respectively set corresponding to the first opening and the third opening. The display device according to claim 8, wherein the range of the orthographic projection of the first opening on the light emitting panel does not overlap at least part of the range of the first micro light emitting element on the light emitting panel, and the range of the orthographic projection of the third opening on the light emitting panel does not overlap at least part of the range of the second micro light emitting element on the light emitting panel. The display device as described in claim 1, further comprising: A microstructure layer has a microstructure area, wherein the first optical layer is located between the microstructure layer and the light-emitting panel, and the microstructure area is arranged corresponding to the first opening. The display device as described in claim 1, further comprising: An optical film layer covers the luminous panel and is arranged between the luminous panel and the first optical layer.

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