TWI698843B - Display panel - Google Patents

Abstract

A display panel includes a backlight module adapted to emit a first light, first and second substrates, a MEMS module, and a light excitation layer. The first substrate includes opening portions for the first light passing therethrough. The MEMS module includes shielding members corresponding to the opening portions and being driven to selectively shield the opening portions. The light excitation layer is at one side of the first substrate and includes quantum dots adapted to be excited by the first light to emit a second light and a third light that are different from the first light. The second substrate is at one side of the light excitation layer and includes pixel areas each includes first, second, and third sub-pixel areas corresponding to the opening portions. The second sub-pixel area only allow the second light to pass through, the third sub-pixel area only allow the third light to pass through.

Description

Display panel

The present invention relates to a display technology, in particular to a display panel that integrates microelectromechanical components and uses a light-excited substance as a light-excited layer.

Microelectromechanical Systems (MEMS) is an industrial technology that integrates microelectronics technology with mechanical engineering. In recent years, it has been gradually applied to display panels. In the MEMS display panel, through the combination of the shielding element and the driving element, it can replace the structure of the optical switch with components such as liquid crystal and polarizer, and the MEMS display panel has high response speed, high contrast, power saving and high color saturation Etc.

However, conventional MEMS display panels use red, green, and blue light-emitting diodes as the light source, which requires a higher cost; in addition, the driving voltage of each color diode is different, which makes the operation of light source control more complicated. It also causes the problem of white point coordinate drift.

In order to solve the problems faced by the conventional technology, the present invention relates to a display panel, so as to improve the light source control and white point coordinate drift problems of the aforementioned MEMS display panel.

In one embodiment, a display panel includes a backlight module, a first substrate, a microelectromechanical module, a photoactive layer, and a second substrate. The backlight module includes a plurality of light-emitting elements, and the light-emitting elements are used to emit the first light. The first substrate includes a plurality of openings, and the openings correspond to the light-emitting elements for passing the first light. The MEMS module includes a plurality of shielding elements, the shielding elements correspond to the openings, and the shielding elements are driven to selectively shield the openings. The light excitation layer is located on the side of the first substrate opposite to the backlight module. The light excitation layer includes a plurality of light excitation materials. The light excitation materials are used to be excited by the first light to emit the second light and the third light. The wavelength of the third light is greater than the wavelength of the second light, and the wavelength of the second light is greater than the wavelength of the first light. The second substrate is located on the side of the photoactive layer opposite to the first substrate. The second substrate includes a plurality of pixel regions, and each pixel region includes a first sub-pixel region, a second sub-pixel region, and a second sub-pixel region corresponding to the opening. Three sub-pixel area. The second sub-pixel area allows the second light to pass through, and the third sub-pixel area allows the third light to pass through.

In one or more embodiments, the microelectromechanical module further includes a plurality of driving elements, and each driving element drives a corresponding shielding element, so that each shielding element selectively shields a corresponding opening. In this way, the shielding elements of the MEMS module can be controlled separately.

In one or more embodiments, the microelectromechanical module is located between the light excitation layer and the backlight module.

In one or more embodiments, the first sub-pixel area allows at least the first light to pass through.

In one or more embodiments, the photoactive layer includes a plurality of first light traveling regions, a plurality of second light traveling regions, and a plurality of third light traveling regions, and the photoactive substance is located in the light traveling region. In each pixel area, the first light travel area corresponds to the first sub-pixel area, the second light travel area corresponds to the second sub-pixel area, the third light travel area corresponds to the third sub-pixel area, and the first light travel area corresponds to the third sub-pixel area. The travel area is not connected to the second light travel area and the third light travel area.

In one or more embodiments, the light excitation layer includes a plurality of first light traveling regions, a plurality of second light traveling regions, and a plurality of third light traveling regions. In each pixel area, the first light traveling area corresponds to the first sub-pixel area, the second light traveling area corresponds to the second sub-pixel area, and the third light traveling area corresponds to the third sub-pixel area. The first light travel area is not connected to the second light travel area and the third light travel area, and the photo-excited substance is located in the second light travel area and the third light travel area but not in the first light travel area.

In one or more embodiments, the photoactive layer includes a plurality of first light traveling regions, a plurality of second light traveling regions, and a plurality of third light traveling regions, and the photoactive substance is located in the light traveling region. In each pixel area, the first light travel area corresponds to the first sub-pixel area, the second light travel area corresponds to the second sub-pixel area, the third light travel area corresponds to the third sub-pixel area, and the light travel area Not connected to each other.

In one or more embodiments, the light excitation layer includes a plurality of first light traveling regions, a plurality of second light traveling regions, and a plurality of third light traveling regions. In each pixel area, the first light travel area corresponds to the first sub-pixel area, the second light travel area corresponds to the second sub-pixel area, the third light travel area corresponds to the third sub-pixel area, and the light excites the substance It is located in the second light travel area and in the third light travel area but not in the first light travel area. Furthermore, the photo-excited substance includes a plurality of first photo-excited substances and a plurality of second photo-excited substances, the first photo-excitable substance is located in the second light-traveling area and the second photo-excited substance is located in the third light-traveling area , The first light-excited substance is excited by the first light to emit a second light, and the second light-excited substance is excited by the first light to emit a third light.

In one or more embodiments, the first sub-pixel area only passes through the first light.

In one or more embodiments, the photo-excited substance is further excited by the first light to emit the fourth light. Among them, the wavelength of the fourth light is greater than the wavelength of the first light, and the wavelength of the fourth light is less than the wavelength of the second light. The first sub-pixel area only passes the fourth light, and the first sub-pixel area blocks the first light.

In one or more embodiments, the photoactive layer includes a plurality of first light traveling regions, a plurality of second light traveling regions, and a plurality of third light traveling regions, and the photoactive substance is located in the light traveling region. In each pixel area, the first light travel area corresponds to the first sub-pixel area, the second light travel area corresponds to the second sub-pixel area, the third light travel area corresponds to the third sub-pixel area, and the light travel area Not connected to each other. Furthermore, the photo-excited substance includes a plurality of first photo-excited substances, a plurality of second photo-excited substances, and a plurality of third photo-excited substances. The first photo-excited substances are located in the second light traveling region, and the second photo-excited substances Located in the third light travel area, the third light excitation material is located in the first light travel area, the first light excitation material is excited by the first light to emit a second light, and the second light excitation material is excited by the first light to emit a third light , The third light-excited substance is excited by the first light to emit a fourth light.

In summary, according to the display panel according to one or more embodiments of the present invention, the first light generated by the backlight module passes through the opening and is selectively shielded/exposed by the shielding element of the MEMS module, and then enters the light excitation The layer and the excitation light excite the substance to generate a second light and a third light, and finally each light passes through the corresponding sub-pixel area to make the display panel present a corresponding color. Therefore, the simplification of light source control also eliminates the problem of white point coordinate drift. In some embodiments, the light excitation layer may be partitioned into a plurality of disconnected light travel areas, so that the light in each light travel area does not enter the sub-pixel area corresponding to the adjacent light travel area to generate stray light interference. In some embodiments, the first sub-pixel area corresponding to the first light is at least for the first light to pass through. Therefore, the first sub-pixel area may be provided with a filter that only passes through the first light, or only Transparent glass for the first light from the light-emitting element to directly penetrate.

FIG. 1A is a schematic partial top view of the pixel area of the display panel according to the first embodiment of the invention. FIG. 1B is a schematic cross-sectional view of the display panel along the line A-A in FIG. 1A.

1A and 1B, the display panel 100 includes a backlight module 11, a first substrate 12, a microelectromechanical module 13, a photoactive layer 14, and a second substrate 15. It should be noted that the display panel 100 may also include signal lines, pixel electrodes, active components, etc., but for the convenience and clarity of presenting the present invention, the following is only for the backlight module 11, the first substrate 12, and the MEMS module. 13. The corresponding relationship between the light excitation layer 14 and the second substrate 15 is described.

Please refer to FIGS. 1A and 1B. In this embodiment, the aforementioned backlight module 11 includes a plurality of light emitting elements 111 for emitting the first light L1. The aforementioned light-emitting elements 111 can be individually controlled to be turned on and off, and can be replaced individually when a failure occurs. In this embodiment, the light-emitting element 111 may be a mini light emitting diode (Mini LED), and its die size is about 100 microns. Compared with micro light emitting diodes, sub-millimeter light emitting diodes have a higher yield in the manufacturing process. In addition, sub-millimeter light-emitting diodes also have the advantages of special-shaped cutting characteristics and power saving.

1A and 1B, the aforementioned first substrate 12 includes a plurality of openings 121 for passing the first light L1. In one embodiment, as shown in FIG. 1B, specifically, the opening 121 and the light emitting element 111 are in a one-to-one relationship and correspond to each other. In this way, the light-emitting elements 111 of the backlight module 11 can be individually controlled, but it is not limited to this. In another embodiment, the light-emitting element 111 and the opening 121 may not correspond to each other in a one-to-one relationship. For example, one light-emitting element 111 may correspond to a plurality of openings 121 through a light guide structure; or, it may be The plurality of light-emitting elements 111 correspond to one opening 121, and it is not limited thereto.

Please refer to FIGS. 1A and 1B, the aforementioned microelectromechanical module 13 includes a plurality of shielding elements 131 and a plurality of driving elements 132. The shielding element 131 corresponds to the opening 121, and the shielding element 131 is driven by the driving element 132 to selectively shield the opening 121. Specifically, each driving element 132 drives the corresponding shielding element 131 to move in the horizontal direction to block or expose the opening 121, and may have elastic force so that the shielding element 131 can be reset after moving. In this way, each shielding element 131 of the microelectromechanical module 13 can be controlled by the corresponding driving element 132 respectively. In addition, as shown in FIG. 1B, in this embodiment, the microelectromechanical module 13 is located between the light excitation layer 14 and the backlight module 11, but it is not limited to this. The MEMS module 13 may also be located between the backlight module 11 and the first substrate 12.

Please refer to FIG. 1A and FIG. 1B, the aforementioned light excitation layer 14 is located on the side of the first substrate 12 opposite to the backlight module 11. The light excitation layer 14 includes a plurality of light excitation materials and a dispersion medium 14a for dispersing the light excitation materials. The light-excited substance is used for being excited by the first light L1 to emit the second light L2 and the third light L3. In this embodiment, the dispersion medium 14a can be a polar or non-polar liquid dispersant, and it is not limited thereto. In this embodiment, the photo-excited substance includes a plurality of first photo-excited substances 141 and a plurality of second photo-excited substances 142. The first light excitation material 141 is excited by the first light L1 to emit a second light L2, and the second light excitation material 142 is excited by the first light L1 to emit a third light L3. Among them, the wavelength of the third light L3 is greater than the wavelength of the second light L2, and the wavelength of the second light L2 is greater than the wavelength of the first light L1. For example, in this embodiment, the first light L1 is a blue light emitted by a blue sub-millimeter light emitting diode, the second light L2 is a green light, and the third light L3 is a red light. Therefore, the light-excited substance emits long-wavelength green and red light after being excited by short-wavelength blue light.

It should be noted that the wavelengths of the first light L1, the second light L2, and the third light L3 refer to the value at the peak position of the waveform formed by each light on the spectrometer, and the waveform of each light may have a certain bandwidth (Bandwidth). In addition, in some embodiments, the aforementioned light-excited substance can be quantum dots, and the quantum dots can be made of zinc selenide (ZnSe), cadmium sulfide (CdS), cadmium selenide (CdSe), zinc sulfide (ZnS), etc. Composition of single-layer or multilayer nano-semiconductor materials. Moreover, when the quantum dots have a multilayer structure, each layer can be the same material or different materials. For example, taking the structure of the quantum dot as an inner and outer double layer as an example, the inner layer may be cadmium selenide (CdSe), and the outer layer may be zinc sulfide (ZnS). In addition, the above-mentioned materials are only examples, and not limited thereto. In some embodiments, the aforementioned photo-excited substance may be a substance that emits fluorescence or phosphorescence after being excited, and it may be an organic or inorganic compound. Furthermore, the quantum dots referred to here are not limited to dot-shaped zero-dimensional structures, but can also be multi-dimensional structures, such as quantum wires, quantum cones, quantum columns, etc. For simplicity, they are generally referred to as quantum dots here. .

Please refer to FIGS. 1A and 1B, the aforementioned second substrate 15 is located on the side of the photo-excited layer 14 opposite to the first substrate 12. The second substrate 15 includes a plurality of pixel areas 151. Each pixel area 151 includes a first sub-pixel area 1511, a second sub-pixel area 1512, a third sub-pixel area 1513, and is located between each sub-pixel area The shading area 152. Each sub-pixel area corresponds to the opening 121, and in this embodiment, the first sub-pixel area 1511 only passes the first light L1, the second sub-pixel area 1512 only passes the second light L2, and the first The three sub-pixel area 1513 only passes through the third ray L3. Specifically, in this embodiment, each sub-pixel area is a filter that can pass light with a specific wavelength, but it is not limited to this. In some embodiments, the aforementioned light-shielding area 152 may be made of a photoresist material, such as a black photoresist, but not limited thereto.

1A and 1B again, the light emitting element 111 of the backlight module 11 of the display panel 100 emits first light L1, and these first light L1 pass through the opening when the shielding element 131 does not cover the opening 121 The portion 121 enters the photo-excited layer 14 and excites the photo-excited substance, thereby generating the second light L2 and the third light L3. Then, these lights reach the second substrate 15 and determine whether they are finally displayed on the display panel 100 according to the filtering mechanism that each sub-pixel area only passes through the specific light, so that the display panel 100 can provide different colors. As shown in FIG. 1B, since the openings 121 corresponding to the first sub-pixel area 1511 and the third sub-pixel area 1513 are both blocked by the blocking element 131, the first light L1 in the pixel area 151 can only The light excitation layer 14 enters from the opening 121 in the middle, and the first light excitation material 141 and the second light excitation material 142 are excited to emit the second light L2 and the third light L3. At this time, a total of the first light L1, the second light L2, and the third light L3 can enter the second substrate 15, but because only the second light L2 can pass through the second sub-pixel region 1512, the second sub-pixel The area 1512 displays the second light L2, and the first sub-pixel area 1511 and the third sub-pixel area 1513 do not transmit light and display black. Therefore, in the end, the entire pixel area 151 will display the color of the second light L2.

The display panel of the present invention is not limited to the above embodiments. Hereinafter, the display panels of other preferred embodiments of the present invention will be introduced in order, and in order to facilitate the comparison of the differences between the embodiments and simplify the description, the same or similar reference numerals are used in the following embodiments to indicate the same or similar The components of, and mainly focus on the differences of the embodiments, and will not repeat the repeated part.

Please refer to Figure 2. FIG. 2 is a schematic cross-sectional view of a display panel 100A according to a second embodiment of the invention. As shown in FIG. 2, different from the first embodiment, in the display panel 100A of this embodiment, the light excitation layer 14 further includes a plurality of first light traveling regions 143, a plurality of second light traveling regions 144, and a plurality of The third light travel area 145, and the first light excitation material 141 and the second light excitation material 142 are located in the aforementioned light travel areas 143, 144, 145. In each pixel area 151, the first light travel area 143 does not connect the second light travel area 144 and the third light travel area 145, and the first light travel area 143 corresponds to the first sub-pixel area 1511, and the second light travel area The area 144 corresponds to the second sub-pixel area 1512, and the third light travel area 145 corresponds to the third sub-pixel area 1513. That is, in this embodiment, the parts of the light excitation layer 14 corresponding to different sub-pixel regions are not completely connected. Specifically, the light-shielding region 152 can be made of a material to separate the photoactive layer 14 into a first light traveling region 143, a second light traveling region 144, and a third light traveling region 145 that are not completely connected. In this way, the light in each light travel area can be reduced accidentally entering the sub-pixel area corresponding to the adjacent light travel area to cause stray light interference.

Please refer to Figure 3. FIG. 3 is a schematic cross-sectional view of a display panel 100B according to a third embodiment of the invention. As shown in FIG. 3, different from the second embodiment, in the display panel 100B of this embodiment, the first photo-excitable substance 141 and the second photo-excitable substance 142 are located in the second light traveling region 144 and the third light traveling The area 145 is not located in the first light traveling area 143, and the first sub-pixel area 1511 at least allows the first light L1 to pass. That is, in the first light traveling region 143, there may be only the dispersion medium 14a without the photo-excited substance. Therefore, the effect of saving materials can be achieved and the manufacturing cost can be reduced. Furthermore, since the first sub-pixel area 1511 is at least for the first light L1 to pass, the first sub-pixel area 1511 can be provided with a filter that only passes the first light L1, or only transparent glass can be provided. The first light L1 from the light-emitting element 11 directly penetrates. In this embodiment, because the first light travel area 143 is not connected to the second light travel area 144/the third light travel area 145, the light in the second light travel area 144/the third light travel area 145 will not Entering the first sub-pixel region 1511 causes stray light interference.

Please refer to Figure 4. 4 is a schematic cross-sectional view of a display panel 100C according to a fourth embodiment of the invention. As shown in FIG. 4, different from the second embodiment, in the display panel 100C of this embodiment, the first light traveling area 143, the second light traveling area 144, and the third light traveling area in each pixel area 151 145 are not connected to each other. In this way, the effect of avoiding stray light interference can also be achieved.

Please refer to Figure 5. FIG. 5 is a schematic cross-sectional view of a display panel 100D according to a fifth embodiment of the invention. As shown in FIG. 5, different from the fourth embodiment, in the display panel 100D of this embodiment, the first photo-excitable substance 141 and the second photo-excitable substance 142 are located in the second light traveling region 144 and the third light traveling The area 145 is not located in the first light traveling area 143. That is, in the first light traveling region 143, there may be only the dispersion medium 14a without the photo-excited substance. Therefore, the effect of saving materials can be achieved and the manufacturing cost can be reduced. Furthermore, since the first sub-pixel area 1511 is at least for the first light L1 to pass, the first sub-pixel area 1511 can be provided with a filter that only passes the first light L1, or only transparent glass can be provided. The first light L1 from the light-emitting element 11 directly penetrates. In this embodiment, because the first light traveling area 143, the second light traveling area 144, and the third light traveling area 145 are not connected to each other, the light rays in each light traveling area will not enter the adjacent light traveling area. Stray light interference occurs in the sub-pixel area.

Please refer to Figure 6. FIG. 6 is a schematic cross-sectional view of a display panel 100E according to a sixth embodiment of the invention. As shown in FIG. 6, different from the fifth embodiment, in the display panel 100E of this embodiment, the first photo-excitable material 141 is located in the second light-traveling region 144 and the second photo-excitable material 142 is located in the third light-traveling region. 145 in. That is to say, it is not necessary to add the second photo-excitable substance 142 to the second light-traveling region 144 nor to add the first photo-excitable substance 141 to the third light-traveling region 145, so that the effect of reducing materials can be achieved and the manufacturing cost can be reduced. . In addition, similar to the foregoing third and fifth embodiments, in the first light traveling region 143, there may be only the dispersion medium 14a without the photo-excited substance. Furthermore, since the first sub-pixel area 1511 is at least for the first light L1 to pass, the first sub-pixel area 1511 can be provided with a filter that only passes the first light L1, or only transparent glass can be provided. The first light L1 from the light-emitting element 11 directly penetrates.

Refer to Figure 7. FIG. 7 is a schematic cross-sectional view of a display panel 200 according to a seventh embodiment of the invention. As shown in FIG. 7, different from the first embodiment, in the display panel 200 of this embodiment, the photo-excited substance further includes a third photo-excited substance 146, and the third photo-excited substance 146 is excited by the first light L1'. The fourth light L4 is emitted. The wavelength of the fourth light L4 is greater than the wavelength of the first light L1' and less than the wavelength of the second light L2. The first sub-pixel area 1511 only passes through the fourth light L4 and blocks the first light L1'. For example, in this embodiment, the light-emitting element 111' is an ultraviolet light sub-millimeter light-emitting diode, and the first light L1' is an ultraviolet light and a second light emitted by the ultraviolet light sub-millimeter light-emitting diode. L2 is green light, third light L3 is red light, and fourth light L4 is blue light. Therefore, the light-excited substance emits long-wavelength blue, green and red light after being excited by short-wavelength ultraviolet light.

Please refer to Figure 8. FIG. 8 is a schematic cross-sectional view of a display panel 200A according to an eighth embodiment of the invention. As shown in FIG. 8, different from the seventh embodiment, in the display panel 200A of this embodiment, the light excitation layer 14 further includes a plurality of first light travel regions 143, a plurality of second light travel regions 144, and a plurality of The third light travel area 145, and the first light excitation material 141, the second light excitation material 142, and the third light excitation material 146 are located in the aforementioned light travel area. In each pixel area 151, the light travel areas are not connected to each other, and the first light travel area 143 corresponds to the first sub-pixel area 1511, the second light travel area 144 corresponds to the second sub-pixel area 1512, and the first light travel area 143 corresponds to the second sub-pixel area 1512. The three-light travel area 145 corresponds to the third sub-pixel area 1513. In this way, it is possible to prevent the light in each light traveling area from accidentally entering the sub-pixel area corresponding to the adjacent light traveling area to cause stray light interference.

Please refer to Figure 9. 9 is a schematic cross-sectional view of a display panel 200B according to a ninth embodiment of the invention. As shown in FIG. 9, different from the eighth embodiment, in the display panel 200B of this embodiment, the first photo-excitable material 141 is located in the second light-traveling region 144, and the second photo-excitable material 142 is located in the third light-traveling region 145. , And the third light-excited substance 146 is located in the first light travel area 143. In other words, it is only necessary to add the corresponding photo-excited substance in each light travel area, so the effect of reducing materials can be achieved and the manufacturing cost can be reduced.

In summary, according to the display panel according to one or more embodiments of the present invention, the first light generated by the backlight module passes through the opening and is selectively shielded/exposed by the shielding element of the MEMS module, and then enters the light excitation The layer and the excitation light excite the substance to generate a second light and a third light, and finally each light passes through the corresponding sub-pixel area to make the display panel present a corresponding color. Therefore, the simplification of light source control also eliminates the problem of white point coordinate drift. In some embodiments, the light excitation layer may be partitioned into a plurality of disconnected light travel areas, so that the light in each light travel area does not enter the sub-pixel area corresponding to the adjacent light travel area to generate stray light interference. In some embodiments, the first sub-pixel area corresponding to the first light is at least for the first light to pass through. Therefore, the first sub-pixel area may be provided with a filter that only passes through the first light, or only Transparent glass for the first light from the light-emitting element to directly penetrate.

FIG. 1A is a schematic partial top view of the pixel area of the display panel according to the first embodiment of the invention. FIG. 1B is a schematic cross-sectional view of the display panel along the line A-A in FIG. 1A. 2 is a schematic cross-sectional view of a display panel according to a second embodiment of the invention. FIG. 3 is a schematic cross-sectional view of a display panel according to a third embodiment of the invention. 4 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the invention. FIG. 5 is a schematic cross-sectional view of a display panel according to a fifth embodiment of the invention. 6 is a schematic cross-sectional view of a display panel according to a sixth embodiment of the invention. FIG. 7 is a schematic cross-sectional view of a display panel according to a seventh embodiment of the invention. FIG. 8 is a schematic cross-sectional view of a display panel according to an eighth embodiment of the invention. 9 is a schematic cross-sectional view of a display panel of a ninth embodiment of the invention.

Claims (10)

A display panel includes: a backlight module, including a plurality of light-emitting elements, the light-emitting elements are used to emit a first light; a first substrate, including a plurality of openings, the openings are used to make the first The light passes through; a microelectromechanical module includes a plurality of shielding elements corresponding to the openings, and the shielding elements are driven to selectively shield the openings; a photo-excited layer located on the first A substrate is opposite to a side of the backlight module, the light excitation layer includes a plurality of light excitation substances, and the light excitation layer includes a plurality of first light travel regions, a plurality of second light travel regions, and a plurality of third light travel regions Area, the light-excited substances are used to be excited by the first light to emit a second light and a third light, the wavelength of the third light is greater than the wavelength of the second light, and the wavelength of the second light is greater than the wavelength of the second light The wavelength of the first light, the photo-excited substances are present at least in the second light travel areas and the third light travel areas, the first light travel areas and the second light travel areas and the first light travel areas The three light travel areas are not connected; and a second substrate located on the side of the photo-excited layer opposite to the first substrate, the second substrate includes a plurality of pixel areas, each of the pixel areas includes a first sub-picture Pixel area, a second sub-pixel area, and a third sub-pixel area, the sub-pixel areas correspond to openings, and in each of the pixel areas, the first light travel area corresponds to the first sub-pixel area Pixel area, the second light travel area corresponds to the second sub-pixel area, and the third light travel area corresponds to the third sub-pixel area, wherein the first sub-pixel area only passes through the first light, The second sub-pixel area only passes the second light, and the third sub-pixel area only passes the third light. The display panel according to claim 1, wherein the photo-excited substances are located in the second light travel area and the third light travel area but not in the first light travel area. The display panel according to claim 1, wherein the first light travel areas, the second light travel areas, and the third light travel areas are not connected to each other. The display panel according to claim 1, wherein the second light travel areas and the third light travel areas are connected to each other. The display panel according to claim 3 or claim 4, wherein the photo-excited substances include a plurality of first photo-excited substances and a plurality of second photo-excited substances, and the first photo-excited substances are located in the second light traveling The second photo-excited substances are located in the third light travel area, the first photo-excited substances are excited by the first light to emit the second light, and the second photo-excited substances are excited by the first light. The light is excited to emit the third light. The display panel of claim 1, wherein the second substrate further includes a plurality of light-shielding regions, and in each of the pixel regions, the light-shielding regions are at least located in the first sub-pixel region and the second sub-pixel Between areas and between the second sub-pixel area and the third sub-pixel area. A display panel includes: a backlight module, including a plurality of light-emitting elements, the light-emitting elements are used to emit a first light; a first substrate, including a plurality of openings, the openings are used to make the first The light passes through; a microelectromechanical module includes a plurality of shielding elements corresponding to the openings, and the shielding elements are driven to selectively shield the openings; a photo-excited layer located on the first A substrate is opposite to a side of the backlight module, and the photo-excited layer includes a plurality of photo-excited substances for being excited by the first light to emit a second light, a third light and a first light. Four rays of light, the wavelength of the third light is greater than the wavelength of the second light, and the wavelength of the second light is greater than the wavelength of the first light, wherein the wavelength of the fourth light is greater than the wavelength of the first light, the fourth light The wavelength of the light is smaller than the wavelength of the second light; and a second substrate is located on the side of the photo-excited layer opposite to the first substrate, the second substrate includes a plurality of pixel regions, and each pixel region includes a A first sub-pixel area, a second sub-pixel area, and a third sub-pixel area. The sub-pixel areas correspond to openings, and the second sub-pixel area is only For the second light to pass through, the third sub-pixel area is only for the third light to pass through, the first sub-pixel area is only for the fourth light to pass through, and the first sub-pixel area blocks the first light . The display panel according to claim 7, wherein the photoactive layer includes a plurality of first light traveling regions, a plurality of second light traveling regions, and a plurality of third light traveling regions, and the photoactive substances are located in the light traveling regions. In each pixel area, the first light travel area corresponds to the first sub-pixel area, the second light travel area corresponds to the second sub-pixel area, and the third light travel area corresponds to the first sub-pixel area. In the three sub-pixel areas, these light travel areas are not connected to each other. The display panel according to claim 8, wherein the photo-excited substances include a plurality of first photo-excited substances, a plurality of second photo-excited substances, and a plurality of third photo-excited substances, and the first photo-excited substances are located in the The second light travel area, the second light excitation materials are located in the third light travel area, the third light excitation materials are located in the first light travel area, and the first light excitation materials are excited by the first light The second light is emitted, the second photo-excited substances are excited by the first light to emit the third light, and the third photo-excited substances are excited by the first light to emit the fourth light. The display panel according to claim 7, wherein the second substrate further includes a plurality of light-shielding regions, and in each of the pixel regions, the light-shielding regions are at least located in the first sub-pixel region and the second sub-pixel Between areas and between the second sub-pixel area and the third sub-pixel area.

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