Display panel

Abstract

The present application provides a display panel comprising a pixel unit. The pixel unit comprises a first sub-pixel and a second sub-pixel. The first sub-pixel comprises a first light emitting element, a first light source element and a first color conversion structure. The light emitted by the first light emitting element has a first color. The first color conversion structure is disposed on the first light source element and is adapted to convert the light emitted by the first light source element into the first color. The second sub-pixel comprises a second light emitting element. The light emitted by the second light emitting element has a second color different from the first color. The present application provides a display panel which can have ideal display quality.

Description

TECHNICAL FIELD

[0001] The present application relates to an electronic device, and more particularly to a display panel. BACKGROUND

[0002] A self-luminous display panel directly uses a light emitting element as a display pixel. Common light emitting elements include a light emitting diode (LED), a micro light emitting diode (μLED), a mini light emitting diode (mini LED), and an organic light emitting diode (OLED). As the size of the light emitting element gradually decreases, the pixel density (PPI) increases, and the display panel can achieve a higher resolution display screen. However, the decrease in the size of the light emitting element also brings many problems, such as the decrease in the external quantum efficiency of the light emitting element, which in turn affects the display quality of the display panel. SUMMARY

[0003] The present application is directed to a display panel that can have an ideal display quality.

[0004] According to an embodiment of the present application, a display panel includes a pixel unit. The pixel unit includes a first sub-pixel and a second sub-pixel. The first sub-pixel includes a first light emitting element, a first light source element, and a first color conversion structure. The first light emitting element emits light having a first color. The first color conversion structure is disposed on the first light source element and is adapted to convert light emitted by the first light source element into the first color. The second sub-pixel includes a second light emitting element. The second light emitting element emits light having a second color different from the first color.

[0005] Based on the above, in the display panel according to an embodiment of the present application, the first sub-pixel in the pixel unit is composed of the first light emitting element, the first light source element, and the first color conversion structure. The first light emitting element emits light having the first color. The first color conversion structure is disposed on the first light source element and converts light emitted by the first light source element into the first color. In this way, the first light source element and the first color conversion structure emit light of the first color in combination with the first light emitting element emitting light of the first color, which helps to improve the problem of poor light emitting efficiency of the light emitting element. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 is a schematic diagram of a display panel according to an embodiment of the present application;

[0007] Figure 2A is a schematic diagram of a pixel unit according to an embodiment of the present application;

[0008] Figure 2B is a sectional view along section line I-I'; Figure 2A is a sectional view along section line I-I';

[0009] Figure 3A is a sectional view along section line I-I';

[0010] Figure 3B Figure 3A is a sectional view along section line II-II';

[0011] Figure 4A is a sectional view along section line II-II';

[0012] Figure 4B is a sectional view along section line II-II'; Figure 4A is a sectional view along section line III-III'.

[0013] BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 100A, 100B, 100C: pixel unit

[0015] 112: first sub-pixel

[0016] 112A: first light emitting element

[0017] 112B: first light source element

[0018] 112C: first color conversion structure

[0019] 112D: first color filter pattern

[0020] 112E: barrier structure

[0021] 112F, 112G: top surface

[0022] 114, 114': second sub-pixel

[0023] 114A: second light emitting element

[0024] 114B: second light source element

[0025] 114C: second color conversion structure

[0026] 114D: color filter pattern

[0027] 114E: barrier structure

[0028] 116, 116': third sub-pixel

[0029] 116A: third light emitting element

[0030] 118: fourth sub-pixel;

[0031] 118B: light source element;

[0032] 118C: color conversion structure;

[0033] 118D: color filter pattern;

[0034] 118E: barrier structure;

[0035] 130: data driving circuit;

[0036] 140: scan driving circuit;

[0037] BM: black matrix;

[0038] C1: first color;

[0039] C2: second color;

[0040] C3: third color;

[0041] C4: fourth color;

[0042] DP: display panel;

[0043] I-I', II-II', III-III': section line;

[0044] SB1: first substrate;

[0045] SB2: second substrate. DETAILED DESCRIPTION

[0046] Reference will now be made in detail to the exemplary embodiments of the present application, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.

[0047] Figure 1 is a schematic view of a display panel according to an embodiment of the present application. The display panel DP includes a plurality of pixel units 100A, a scan driving circuit 140 and a data driving circuit 130. The pixel units 100A are arranged in an array. The scan driving circuit 140 is configured to provide a scan signal to corresponding pixel units 100A, and the data driving circuit 130 is configured to provide a data signal to corresponding pixel units 100A, so as to realize independent driving of individual pixel units 100A. In addition, the pixel units 100A include a plurality of sub-pixels, such as a first sub-pixel 112, a second sub-pixel 114 and a third sub-pixel 116. In this embodiment, each pixel unit 100A is exemplarily illustrated as including three sub-pixels, but the present application is not limited thereto. In some embodiments, each pixel unit 100A can include two sub-pixels, four sub-pixels or a number of sub-pixels.

[0048] Figure 2A FIG. 1 is a schematic diagram of a pixel unit according to an embodiment of the present application. Figure 2B For Figure 2A FIG. 2 is a schematic diagram of a cross-section along the section line I-I’ of FIG. 1. Please refer to Figure 2A to Figure 2B The pixel unit 100A includes a first sub-pixel 112 and a second sub-pixel 114 adjacent to each other. The first sub-pixel 112 includes a first light emitting element 112A, a first light source element 112B, and a first color conversion structure 112C. The first light emitting element 112A and the first light source element 112B can be a light emitting diode (LED), a mini LED, a micro LED, an organic light emitting diode (OLED), or any light emitting element, etc. However, the first light emitting element 112A and the first light source element 112B are configured to provide light of different wavelengths. For example, the first light emitting element 112A and the first light source element 112B emit light of different colors. The first color conversion structure 112C can be configured to convert the wavelength of the light emitted by the first light source element 112B, such that the first light source element 112B and the first color conversion structure 112C together provide light of the same color as the first light emitting element 112A. In this way, the color presented by the first sub-pixel 112 is achieved by two light emitting means, in which the light of the first light emitting element 112A is directly emitted to present the color of the first sub-pixel 112, and the light of the first light source element 112B is not directly emitted but is converted by the first color conversion structure 112C to present the color of the first sub-pixel 112. Therefore, although the first light emitting element 112A and the first light source element 112B can both be implemented by a light emitting diode, they are named differently in this specification. In addition, the first sub-pixel 112 and the second sub-pixel 114 are arranged adjacent to each other in this embodiment, but in other embodiments, it is not excluded that other sub-pixels are arranged between the first sub-pixel 112 and the second sub-pixel 114.

[0049] In some embodiments, the first color conversion structure 112C can be a quantum dot color conversion structure or a polymer color conversion structure. The first color conversion structure 112C is capable of absorbing light of a short wavelength and converting it into light of a long wavelength. For example, the first color conversion structure 112C can absorb ultraviolet light (wavelength range of about 1 nm to 380 nm), violet light (wavelength range of about 380 nm to 450 nm), and blue light (wavelength range of about 450 nm to 495 nm) and convert them into red light (wavelength range of about 620 nm to 750 nm), yellow light (wavelength range of about 570 nm to 590 nm), or green light (wavelength range of about 495 nm to 570 nm), etc. The first color conversion structure 112C is disposed on the first light source element 112B and is used to absorb and convert the light emitted by the first light source element 112B. In this way, the light emitted by the first light source element 112B is light of a short wavelength, such as blue light, ultraviolet light, or deep ultraviolet light, etc., which can be absorbed by the first color conversion structure 112C.

[0050] The wavelength of the light emitted by the first color conversion structure 112C after absorbing light of a short wavelength can be determined according to the material, microstructure, and other parameters of the first color conversion structure 112C. Therefore, based on the selection of the material, the light emitted by the first color conversion structure 112C can have a specific color that is different from the color of the absorbed light. In this embodiment, the light emitted by the first light emitting element 112A has a first color C1, and the light emitted by the first light source element 112B does not have the first color C1. The first color conversion structure 112C is disposed on the first light source element 112B and is adapted to convert the light emitted by the first light source element 112B into the first color C1. In this way, the first sub-pixel 112 can use two light emitting means to present the first color C1.

[0051] In this embodiment, the second sub-pixel 114 includes a second light emitting element 114A. The light emitted by the second light emitting element 114A has a second color C2. The second color C2 is different from the first color C1. The wavelength of the light emitted by the second light emitting element 114A is smaller than the wavelength of the light emitted by the first light emitting element 112A. The first color C1 is, for example, red, and the second color C2 can be light with a wavelength smaller than red, such as green or blue.

[0052] In the present embodiment, the pixel unit 100A further comprises a third sub-pixel 116. The third sub-pixel 116 can be adjacent to the first sub-pixel 112 or the third sub-pixel 116 can be adjacent to the second sub-pixel 114. In other words, the third sub-pixel 116 is adjacent to at least one of the first sub-pixel 112 or the second sub-pixel 114. The third sub-pixel 116 comprises a third light emitting element 116A. The third light emitting element 116A emits light having a third color C3. The third color C3 is different from the first color C1 and the second color C2. In this way, the first sub-pixel 112, the second sub-pixel 114 and the third sub-pixel 116 are used to present the first color C1, the second color C2 and the third color C3, respectively, to realize a multi-color picture of the display panel DP. In some embodiments, the first color C1, the second color C2 and the third color C3 are red, green and blue, respectively, but the present application is not limited thereto. For example, the first color C1, the second color C2 and the third color C3 can be three different colors of light in the visible light.

[0053] The position of the peak wavelength of the emission spectrum can determine the color of the emitted light. The peak wavelength can be defined as the wavelength of the maximum relative emission intensity in the emission spectrum, which can be a photoluminescence (PL) spectrum, an electroluminescence (EL) spectrum, or any spectrum formed by emission, absorption or scattering of light by a substance. For example, the peak wavelength of red light can range from about 620 nm to 750 nm, the peak wavelength of yellow light can range from about 570 nm to 590 nm, the peak wavelength of green light can range from about 495 nm to 570 nm, the peak wavelength of blue light can range from about 450 nm to 495 nm, and the peak wavelength of violet light can range from about 380 nm to 450 nm. Red light can be divided into deep red light, super red light, and far red light. The peak wavelength of deep red light can range from about 620 nm to 660 nm, the peak wavelength of super red light can range from about 660 nm to 710 nm, and the peak wavelength of far red light can range from about 710 nm to 760 nm. In the embodiments herein, an emission peak wavelength difference of more than 50 nm can be defined as light of different colors, and an emission peak wavelength difference of less than 5 nm can be defined as light of the same color. In addition, the same color referred to herein can also be defined by the CIE 1931 xy chromaticity diagram established by the International Commission on Illumination (CIE). For example, in the CIE 1931 xy chromaticity diagram, if the difference between the x coordinates and the difference between the y coordinates of any two points are both less than 0.02, the colors of the two points can be considered the same, but the present application is not limited thereto.

[0054] In this embodiment, the difference between the peak wavelength of the light emitted by the first light emitting element 112A and the first light source element 112B is more than 50 nm. The first light source element 112B converts the light emitted by the first light emitting element 112A through the first color conversion structure 112C, and the difference between the peak wavelength of the light emitted by the first light source element 112B and the first light emitting element 112A falls within the range of 2 nm to 5 nm. Therefore, the first color conversion structure 112C not only converts the light emitted by the first light source element 112B and helps to improve the luminous intensity of the first color C1 of the first sub-pixel 112, thereby improving the luminous efficiency of the first sub-pixel 112, but also can use the effect of light color conversion to expand the color gamut of the first sub-pixel 112.

[0055] In this embodiment, the difference between the peak wavelength of the light emitted by the first light emitting element 112A, the second light emitting element 114A of the second sub-pixel 114, and the third light emitting element 116A of the third sub-pixel 116 is more than 50 nm. In this way, the first sub-pixel 112, the second sub-pixel 114, and the third sub-pixel 116 can be used to present three different colors, such as red light, green light, and blue light, to realize a multi-color picture of the display panel DP, but not limited thereto.

[0056] In this embodiment, the first light emitting element 112A, the first light source element 112B, the second light emitting element 114A, and the third light emitting element 116A are light emitting diodes. Referring again to Figure 2A and Figure 2B, the first light emitting element 112A has a top surface 112F, and the first light source element 112B has a top surface 112G. In some embodiments, the top surface 112F of the first light emitting element 112A, the top surface 112G of the first light source element 112B, each has an area-to-perimeter ratio less than 10, and preferably less than 5. Similarly, the top surfaces of the second light emitting element 114A and the third light emitting element 116A also have an area-to-perimeter ratio less than 10, or further less than 5. That is, the first light emitting element 112A, the first light source element 112B, the second light emitting element 114A, and the third light emitting element 116A have a small area-to-perimeter ratio, and thus can be implemented by using small-sized light emitting diodes (e.g., sub-millimeter light emitting diodes, micro light emitting diodes, etc.). In this way, the pixel unit 100A of the display panel DP can have a reduced area, and thus more pixel units 100A can be arranged in the same area to achieve a higher resolution layout design. Generally, when the size of a light emitting diode is reduced, the internal leakage current and non-radiative recombination thereof are simultaneously increased, mainly due to sidewall defects of the light emitting element. Therefore, the reduction of the size of the light emitting diode affects the external quantum efficiency thereof. In particular, this problem is more obvious in a red light emitting diode based on the difference in the selected materials.

[0057] In the present embodiment, the first color C1 presented by the first sub-pixel 112 is, for example, red, and the first sub-pixel 112 uses the combination of the first light source element 112B and the first color conversion structure 112C in addition to the first light emitting element 112A to present the display light required by the first sub-pixel 112. In this way, the arrangement of the first light source element 112B and the first color conversion structure 112C helps to compensate for the problem of poor external quantum efficiency of the red light emitting diode that may exist in the first light emitting element 112A. In addition, the insufficient luminous intensity of the first light emitting element 112A can be compensated by the light provided by the first light source element 112B and the first color conversion structure 112C without the need to increase the current density of the first light emitting element 112A.

[0058] In the present embodiment, as shown in FIG. 1, the first light source element 112B and the first color conversion structure 112C are arranged on the top surface 112G of the first light source element 112B. Figure 2BAs shown, the display panel DP can specifically include a first substrate SB1, a second substrate SB2, a first sub-pixel 112, a second sub-pixel 114, and a third sub-pixel 116. The first substrate SB1 and the second substrate SB2 are disposed opposite to each other, and the first light emitting element 112A and the first light source element 112B of the first sub-pixel 112, the second light emitting element 114A of the second sub-pixel 114, and the third light emitting element 116A of the third sub-pixel 116 are all disposed on the first substrate. Meanwhile, the first color conversion structure 112C is disposed between the first light source element 112B and the second substrate SB2 and is located in the light emitting direction of the first light source element 112B. In addition, the display panel DP further includes a black matrix BM located between adjacent two of the first sub-pixel 112, the second sub-pixel 114, and the third sub-pixel 116. The black matrix BM can be disposed on the second substrate. The black matrix BM disposed between adjacent two of the first sub-pixel 112, the second sub-pixel 114, and the third sub-pixel 116 can avoid mixing with each other between adjacent two of the first sub-pixel 112, the second sub-pixel 114, and the third sub-pixel 116, which helps to improve the display contrast and display color of the display panel DP. In some embodiments, the black matrix BM can surround an individual sub-pixel region, and the first sub-pixel 112, the second sub-pixel 114, and the third sub-pixel 116 are each disposed in a corresponding sub-pixel region.

[0059] In the present embodiment, the display panel DP can further include a color filter pattern 112D and a barrier structure 112E in the first sub-pixel 112. The color filter pattern 112D is disposed on the first color conversion structure 112C and can be a filter pattern having a first color C1. The barrier structure 112E can be disposed between the first substrate SB1 and the second substrate SB2 and surrounds the first color conversion structure 112C. The area of the color filter pattern 112D projected on the first substrate SB1 can overlap the area of the first color conversion structure 112C projected on the first substrate SB1. Therefore, the color filter pattern 112D can be used to filter the light emitted by the first color conversion structure 112C and / or the first light source element 112B to provide light having the first color C1. In some embodiments, when the light emitted by the first light source element 112B is not completely converted by the first color conversion structure 112C, the color filter pattern 112D can filter the unconverted light, allowing only light of the first color C1 wavelength to pass through the substrate SB2. Therefore, the arrangement of the color filter pattern 112D helps to ensure that the color provided by the first sub-pixel 112 is the first color C1.

[0060] In some embodiments, the color filter pattern 112D can be selectively disposed on the first light emitting element 112A and the first color conversion structure 112C at the same time. That is, the area of the first substrate SB1 projected by the color filter pattern 112D can overlap the area of the first substrate SB1 projected by the first light emitting element 112A, the first color conversion structure 112C and the first light source element 112B at the same time. Since the light emitted by the first light emitting element 112A is of the first color C1, the light can penetrate the color filter pattern 112D, thereby improving the color purity of the light emitted by the first sub-pixel 112. In addition, in some embodiments, the display panel DP can also selectively include a color filter pattern corresponding to at least one of the second sub-pixel 114 and the third sub-pixel 116. The color filter pattern corresponding to the second sub-pixel 114 can have the second color C2, and the color filter pattern corresponding to the third sub-pixel 116 can have the third color C3. In other words, each sub-pixel can selectively be combined with a suitable color filter pattern or omit the color filter pattern according to requirements.

[0061] Figure 3A FIG. 1 is a schematic view of a pixel unit according to an embodiment of the present application. Figure 3B For Figure 3A FIG. 2 is a schematic view along the section line II-II’ of the pixel unit of FIG. 1. Figure 3A With Figure 3B In the present embodiment, the pixel unit 100B includes a first sub-pixel 112, a second sub-pixel 114’ and a third sub-pixel 116’. The first sub-pixel 112 is the same as the first sub-pixel 112 of the previous embodiment. However, the second sub-pixel 114’ includes a second light emitting element 114A, a second light source element 114B and a second color conversion structure 114C, and the third sub-pixel 116’ includes two third light emitting elements 116A. The first light emitting element 112A, the first light source element 112B, the second light emitting element 114A, the second light source element 114B and the two third light emitting elements 116A can all be light emitting diodes, such as sub-millimeter light emitting diodes or micro light emitting diodes.

[0062] The first sub-pixel 112 is configured to emit display light of the first color C1, the second sub-pixel 114' is configured to emit display light of the second color C2, and the third sub-pixel 116' is configured to emit display light of the third color C3, thereby providing a multi-colored display effect. In the present embodiment, the second sub-pixel 114' is designed similarly to the first sub-pixel 112, e.g., using two light emitting means to emit display light of the second color C2. For example, the second light emitting element 114A of the second sub-pixel 114' can directly emit light of the second color C2, and the second color conversion structure 114C is disposed on the second light source element 114B to convert the light emitted by the second light source element 114B into the second color C2.

[0063] The difference between the peak wavelength of the light emitted by the second light emitting element 114A of the second sub-pixel 114' and the light emitted by the second light source element 114B through the second color conversion structure 114C is less than 5 nm, and thus the light emitted by the second light source element 114B through the second color conversion structure 114C and the light emitted by the second light emitting element 114A have the same color, which helps to improve the luminous intensity of the second color C2 of the second sub-pixel 114'. The same color referred to herein can be defined by the CIE 1931 xy chromaticity diagram established by the International Commission on Illumination (International Commission on Illumination). For example, in the CIE 1931 xy chromaticity diagram, if the difference between the x coordinate and the y coordinate of any two points is less than 0.02, the colors of the two points can be considered the same, but the present application is not limited thereto.

[0064] In some embodiments, the first light source element 112B and the second light source element 114B can emit light of the same color. For example, the first light source element 112B and the second light source element 114B can both emit blue light, but the present application is not limited thereto. In some embodiments, the light emitted by the first light source element 112B and the second light source element 114B is suitable for exciting the corresponding color conversion structure, and thus does not need to have the same color.

[0065] In addition, the second sub-pixel 114' can further include a color filter pattern 114D and a barrier structure 114E. The color filter pattern 114D is disposed on the second color conversion structure 114C and can be a filter pattern having the second color C2. The barrier structure 114E can be disposed between the first substrate SB1 and the second substrate SB2 and surround the second color conversion structure 114C. The color filter pattern 114D can project an area on the first substrate SB1 that overlaps an area on the first substrate SB1 projected by the second color conversion structure 114C. The color filter pattern 114D can be used to filter light emitted by the second color conversion structure 114C and / or the second light source element 114B to provide light having the second color C2. In some embodiments, when light emitted by the second light source element 114B is not completely converted by the second color conversion structure 114C, the color filter pattern 114D can filter some of the unconverted light, ensuring that the second sub-pixel 114' provides a color of the second color C2. In some embodiments, the color filter pattern 114D can be disposed on both the second light emitting element 114A and the second color conversion structure 114C. For example, the color filter pattern 114D can project an area on the first substrate SB1 that overlaps both an area on the first substrate SB1 projected by the second light emitting element 114A and an area on the first substrate SB1 projected by the second color conversion structure 114C. In this way, the color purity of the second sub-pixel 114' can be further improved.

[0066] The third sub-pixel 116' has two third light emitting elements 116A, and the two third light emitting elements 116A can emit light of the same or different colors, such as the third color C3 or other colors. In some embodiments, light of the third color C3 has a shorter wavelength than light of the first color C1 and light of the second color C2. For example, the third color C3 can be blue, and the first color C1 and the second color C2 can be red and green, respectively. In some embodiments, the first light source element 112B of the first sub-pixel 112 and the second light source element 114B of the second sub-pixel 114' can emit light of the same color as the third light emitting element 116A, but are not limited thereto.

[0067] In the pixel unit 100B of the present embodiment, both the first sub-pixel 112 and the second sub-pixel 114' employ light source elements to assist light emitting elements, and both present light of the same color. That is, the light source elements, with the aid of color conversion structures, can assist the light emitting elements of the corresponding sub-pixels to present the required brightness or increase the wavelength band of the displayed color. In this way, the driving conditions (such as but not limited to current density) of each light emitting element of the pixel unit 100B become simpler, and the complexity of adjusting the color of the light emitting elements can be reduced by the color conversion structures. In addition, as mentioned above, the design of the three sub-pixels of the pixel unit 100B each having two light emitting diodes helps to make the structural layout of the pixel unit 100B more regular.

[0068] In the present embodiment, the second light source element 114B is a light emitting diode. As with the foregoing description, the ratio of the area of the top surface of the second light source element 114B to the perimeter can be less than 10 or more preferably less than 5. In this way, the area of the pixel unit 100B of the display panel DP can be reduced, thereby facilitating the arrangement of a greater number of pixel units 100B in the same area to achieve a higher resolution layout design.

[0069] Figure 4A is a schematic diagram of a pixel unit according to an embodiment of the present application. Figure 4B is Figure 4A is a cross-sectional view along section line III-III'. In Figure 4A is Figure 4B In the present embodiment, the pixel unit 100C includes a first sub-pixel 112, a second sub-pixel 114', a third sub-pixel 116 and a fourth sub-pixel 118. The first sub-pixel 112 is the same as the first sub-pixel 112 of the foregoing embodiments, the second sub-pixel 114' is the same as the second sub-pixel 114' of the foregoing embodiments, and the third sub-pixel 116 is the same as the third sub-pixel 116 of the foregoing embodiments. Specifically, the first sub-pixel 112 includes a first light emitting element 112A, a first light source element 112B, a first color conversion structure 112C, a color filter pattern 112D and a barrier structure 112E; the second sub-pixel 114' includes a second light emitting element 114A, a second light source element 114B, a second color conversion structure 114C, a color filter pattern 114D and a barrier structure 114E; the third sub-pixel 116 includes a third light emitting element 116A; and the fourth sub-pixel 118 includes a fourth light source element 118B and a fourth color conversion structure 118C.

[0070] In this embodiment, the first sub-pixel 112 is configured to present display light of a first color C1; the second sub-pixel 114' is configured to present display light of a second color C2; the third sub-pixel 116 is configured to present display light of a third color C3; and the fourth sub-pixel 118 is configured to present display light of a fourth color C4, thereby providing a multi-colored display effect. The first sub-pixel 112, the second sub-pixel 114', and the third sub-pixel 116 can present corresponding colors by means and structures similar to those described in the foregoing embodiments, which will not be repeated here. The fourth color C4 can be achieved by converting light emitted by the fourth light source element 118B through the fourth color conversion structure 118C to the desired color, i.e., the fourth color C4. In some embodiments, the first color C1, the second color C2, and the third color C3 can be red, green, and blue, respectively, and the fourth color C4 can be yellow. The fourth light source element 118B and the fourth color conversion structure 118C of the fourth sub-pixel 118 can be integrated with the third sub-pixel 116 in the same sub-pixel region to emit light of the third color C3 and the fourth color C4 in the same sub-pixel region. In some embodiments, the third color C3 presented by the third sub-pixel 116 and the fourth color C4 presented by the fourth sub-pixel 118 can mix to white, so that the corresponding sub-pixel region presents display light that is substantially white, but the present application is not limited thereto. In this embodiment, the third light emitting element 116A and the fourth light source element 118B can be the same type of element, such as the same color of light emitting diode, but the present application is not limited thereto. In other embodiments, the third light emitting element 116A and the fourth light source element 118B can be light emitting diodes of different light emitting colors. In this embodiment, the fourth light source element 118B is a light emitting diode, and the ratio of the area of the top surface of the fourth light source element 118B to the circumference is less than 10 or, more preferably, less than 5, but the present application is not limited thereto. In addition, the light emitted by the fourth light source element 118B through the fourth color conversion structure 118C can have a different color, such as yellow, from the light emitted by the third light emitting element 116A, such as blue. In this way, the third sub-pixel 116 and the fourth sub-pixel 118 in the same sub-pixel region have different third color C3 display light and fourth color C4 display light.

[0071] In addition, the fourth sub-pixel 118 can further include a color filter pattern 118D and a barrier structure 118E. The color filter pattern 118D is disposed on the fourth color conversion structure 118C and can be a filter pattern having a fourth color C4. The barrier structure 118E can be disposed between the first substrate SB1 and the second substrate SB2 and surround the fourth color conversion structure 118C. The color filter pattern 118D can project onto an area of the first substrate SB1 that overlaps an area of the first substrate SB1 on which the fourth color conversion structure 118C projects. The color filter pattern 118D can be used to filter light emitted by the fourth color conversion structure 118C and / or the fourth light source element 118B to provide light having the fourth color C4. In some embodiments, when light emitted by the fourth light source element 118B is not completely converted by the fourth color conversion structure 118C, the color filter pattern 118D can filter the unconverted light, allowing only light of the fourth color C4 wavelength to pass through the substrate SB2.

[0072] In summary, in the display panel of the embodiments of the present application, at least one sub-pixel in a pixel unit includes a light emitting element, a light source element, and a color conversion structure disposed on the light source element to convert light emitted by the light source element into light of the same color as the light emitting element, thereby improving the light emitting efficiency of the sub-pixel. In addition, the color conversion structure of some sub-pixels is disposed on the light source element to convert light emitted by the light source element into light of a different color from the light emitting element, so that the sub-pixel provides different colors and improves the color rendering of the display panel.

[0073] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. The features of each embodiment can be arbitrarily mixed and used as long as they do not conflict with each other or deviate from the spirit of the application.

Claims

1. A display panel, characterized by, Comprising: a pixel unit, comprising: a first sub-pixel, comprising: a first light-emitting element, emitting light having a first color; a first light source element; and a first color conversion structure, disposed on the first light source element and adapted to convert light emitted by the first light source element into the first color; and a second sub-pixel, comprising a second light-emitting element, and the second light-emitting element emits light having a second color different from the first color, wherein the peak emission wavelength of the first light-emitting element and the peak emission wavelength of the first color conversion structure fall within a range of 2 nm to 5 nm, and the peak emission wavelength of the first light source element is more than 50 nm lower than the peak emission wavelength of the first light-emitting element.

2. The display panel of claim 1, wherein, wherein the second sub-pixel further comprises a second light source element and a second color conversion structure, the second color conversion structure being disposed on the second light source element and adapted to convert light emitted by the second light source element into the second color.

3. The display panel of claim 1, wherein, wherein the difference between the peak emission wavelength of the first light-emitting element and the peak emission wavelength of the second light-emitting element is greater than 50 nm.

4. The display panel of claim 1, wherein, wherein the pixel unit further comprises a third sub-pixel adjacent to at least one of the first sub-pixel and the second sub-pixel, the third sub-pixel comprising a third light-emitting element, and the third light-emitting element emits light having a third color different from the first color and the second color.

5. The display panel of claim 4, wherein, Further comprising a fourth sub-pixel adapted to emit light having a fourth color different from the first color, the second color and the third color.

6. The display panel of claim 5, wherein, wherein the fourth sub-pixel further comprises a fourth light source element and a fourth color conversion structure, the fourth color conversion structure being disposed on the fourth light source element, and light emitted by the fourth light source element is converted into the fourth color via the fourth color conversion structure.

7. The display panel of claim 1, wherein, wherein the first light-emitting element, the first light source element and the second light-emitting element each have a top surface, and the ratio of the area to the perimeter of each top surface is less than 10.

8. The display panel of claim 1, wherein, wherein the first color is red, and the second color is green or blue.

9. The display panel of claim 1, wherein, Further comprising a color filter pattern located on at least one of the first sub-pixel and the second sub-pixel.

10. The display panel of claim 1, wherein, Further comprising a black matrix located between the first sub-pixel and the second sub-pixel.

11. The display panel of claim 1, wherein, wherein the light emitted by the first light source element is blue light, ultraviolet light or deep ultraviolet light.

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