Light absorbing structure and display device

Abstract

The invention discloses a light absorption structure for a display device. The light absorption structure comprises a light control layer and a first optical compensation film overlapped on the light control layer. The included angle between the absorption axis of the light control layer and the normal direction of the light control layer is less than or equal to 10 degrees. The absolute value of the in-plane phase retardation R0 of the first optical compensation film is greater than 130 nm and less than 550 nm.

Description

Technical Field

[0001] The invention relates to a light absorbing structure and a display device. Background Art

[0002] A transparent display device is a light-transmitting display device, which allows users to see both the displayed image information and the background information behind the display device at the same time. Transparent display devices have many uses, such as vending machine windows, car windows, home windows, and store windows.

[0003] When the display device displays an image, the light emitted by the light source inside the display device may be reflected inside the display device, causing light leakage from the back of the display device. In particular, when the viewing angle is large, the image displayed by the display device may be reflected at the interface between the display device and the air, and the reflected light may leak from the back of the display device, affecting the visual effect of the back of the display device. Summary of the invention

[0004] The invention provides a light absorption structure for a display device. The light absorption structure comprises a light control layer and an optical compensation film overlapped on the light control layer, thereby reducing the back side light leakage problem of the display device.

[0005] At least one embodiment of the present invention provides a light absorption structure for a display device, comprising a light control layer and a first optical compensation film overlapping the light control layer. The angle between the absorption axis of the light control layer and the normal direction of the light control layer is less than or equal to 10 degrees. The absolute value of the in-plane phase retardation R0 of the first optical compensation film is greater than 130nm and less than 550nm.

[0006] At least one embodiment of the present invention provides a display device, including a display panel and a light absorption structure. The display panel has a first surface and a second surface opposite to the first surface, and the first surface is a display surface of the display panel. The light absorption structure is located on the first surface or the second surface of the display panel. The light absorption structure includes a light control layer and a first optical compensation film overlapping the light control layer. The angle between the absorption axis of the light control layer and the normal direction of the light control layer is less than or equal to 10 degrees. The absolute value of the in-plane phase delay R0 of the first optical compensation film is greater than 130nm and less than 550nm. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0008] Figure 2 is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0009] Figure 3 is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0010] Figure 4 is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0011] Figure 5 is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0012] Fig. 6A It is a cross-sectional schematic diagram of a light control layer of a display device according to an embodiment of the present invention.

[0013] Figure 6B It is a cross-sectional schematic diagram of liquid crystal molecules in a light control layer according to an embodiment of the present invention.

[0014] Figure 7 It is a simulation diagram of the back-side light leakage brightness of a display device and the thickness direction phase retardation Rth and the in-plane phase retardation R0 of the first optical compensation film according to an embodiment of the present invention.

[0015] Fig. 8A The relative brightness distribution of a display device at each viewing angle according to an embodiment of the present invention is shown.

[0016] Figure 8B 4 is a graph showing a tilt angle (theta) and backside light leakage of a display device when the azimuth angle (phi) is 0° according to an embodiment of the present invention.

[0017] Fig.9A The relative brightness distribution of a display device at each viewing angle according to an embodiment of the present invention is shown.

[0018] Fig. 9B 4 is a graph showing a tilt angle (theta) and backside light leakage of a display device when the azimuth angle (phi) is 0° according to an embodiment of the present invention.

[0019] Fig. 10A The relative brightness distribution of a display device at each viewing angle according to an embodiment of the present invention is shown.

[0020] Fig. 10B 4 is a graph showing a tilt angle (theta) and backside light leakage of a display device when the azimuth angle (phi) is 0° according to an embodiment of the present invention.

[0021] Wherein, the reference numerals are:

[0022] 1A, 1B, 1C, 1D, 1E: Display device

[0023] 10: Display Panel

[0024] 11: Side 1

[0025] 12: Side 2

[0026] 20A, 20B, 20C, 20D, 20E: light absorbing structure

[0027] 100: Circuit board

[0028] 110:Substrate

[0029] 120,130,140,150: insulation layer

[0030] 160:Signal line

[0031] 170:Pad

[0032] 180:Reflective layer

[0033] 190: Light Emitting Diode

[0034] 192: Electrode

[0035] 194:Solder

[0036] 200: Encapsulation layer

[0037] 210: Transparent adhesive layer

[0038] 220: Cover

[0039] 300: Light control layer

[0040] 310:Liquid crystal molecules

[0041] 320: Dye

[0042] 410A, 410B, 410C: first optical compensation film

[0043] 420B, 420C: Second optical compensation film

[0044] 430D, 430E: The third optical compensation film

[0045] 440D: Fourth optical compensation film

[0046] 500: Anti-reflective film

[0047] 502: Normal direction

[0048] 610,710,620,720,630,730,740,750,760: light

[0049] LD: Long axis

[0050] ND: Normal direction

[0051] SD: Short axis

[0052] α: Angle DETAILED DESCRIPTION

[0053] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0054] Figure 1 is a cross-sectional schematic diagram of a display device 1A according to an embodiment of the present invention. Figure 1 The display device 1A includes a display panel 10, a light absorption structure 20A and an anti-reflection film 500. The light absorption structure 20A is disposed in or on the display panel 10. The anti-reflection film 500 is disposed outside the display panel 10 or the light absorption structure 20A.

[0055] The display panel 10 has a first surface 11 and a second surface 12 (also referred to as a back surface) opposite to the first surface 11 (also referred to as a display surface). The display panel 10 is a transparent display panel in any form, such as a transparent liquid crystal display panel, a transparent micro-light emitting diode display panel, a transparent organic light emitting diode display panel, or other types of display panels. In this embodiment, the display panel 10 is a transparent micro-light emitting diode display panel. In some embodiments, the light absorption structure 20A is located on the first surface 11 of the display panel 10, and the light absorption structure 20A is located between the anti-reflection film 500 and the display panel 10.

[0056] The display panel 10 includes a circuit substrate 100, a light emitting diode 190, a packaging layer 200, and a cover plate 220. The side of the circuit substrate 100 facing away from the cover plate 220 is a second side 12, and the side of the cover plate 220 facing away from the circuit substrate 100 is a first side 11. The light emitting diode 190 and the packaging layer 200 are located between the circuit substrate 100 and the cover plate 220. The circuit substrate 100 includes a substrate 110, an insulating layer 120, an insulating layer 130, an insulating layer 140, an insulating layer 150, a signal line 160, a pad 170, and a reflective layer 180.

[0057] The substrate 110 and the cover plate 220 are, for example, rigid substrates, and their materials may be glass, quartz, organic polymers or other applicable materials. However, the present invention is not limited thereto, and in other embodiments, the substrate 110 and the cover plate 220 may also be flexible substrates or stretchable substrates. For example, the materials of the flexible substrate and the stretchable substrate include polyimide (PI), polydimethylsiloxane (PDMS), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyester (PES), polymethylmethacrylate (PMMA), polycarbonate (PC), polyurethane PU or other suitable materials.

[0058] The insulating layer 120, the insulating layer 130, the insulating layer 140 and the insulating layer 150 are sequentially disposed on the substrate 110. In some embodiments, the material and quantity of the insulating layers on the substrate 110 can be adjusted according to requirements. The signal line 160 is disposed on the substrate 110. In some embodiments, the position of the signal line 160 can be adjusted according to requirements. For example, the signal line 160 can be disposed between the insulating layers.

[0059] The insulating layer 150 has an opening for accommodating the light emitting diode 190 , and the reflective layer 180 is optionally disposed on a surface of the opening, thereby improving the light emitting efficiency of the display device 1A.

[0060] The light emitting diode 190 is electrically connected to the pad 170 of the circuit substrate 100. For example, the electrode 192 of the light emitting diode 190 is connected to the pad 170 through the solder 194. In other embodiments, the light emitting diode 190 is connected to the pad 170 through a conductive adhesive. The light emitting diode 190 can be any form of light emitting diode, and the present invention does not limit the color and type of the light emitting diode 190.

[0061] The packaging layer 200 covers the light emitting diode 190. The cover plate 220 is combined with the packaging layer 200 through the transparent adhesive layer 210. The material of the transparent adhesive layer 210 is, for example, optical clear resin (OCR), optical clear adhesive (OCA), pressure sensitive adhesive (PSA), or other suitable adhesive materials.

[0062] The light absorption structure 20A is located outside the display panel 100 or inside the display panel 100. In this embodiment, the light absorption structure 20A is located on the first surface 11 of the display panel 100, but the present invention is not limited thereto. In other embodiments, the light absorption structure 20A is located on the second surface 12 of the display panel 100 or between the substrate 110 and the cover plate 220.

[0063] The light absorption structure 20A includes a light control layer 300 and a first optical compensation film 410A overlapping the light control layer 300. In the present embodiment, the light control layer 300 is located between the first optical compensation film 410A and the first surface 11 of the cover plate 220.

[0064] The light control layer 300 can be a film or a liquid crystal cell, which is configured to absorb light of a specific polarization state. Generally speaking, unpolarized light contains P waves and S waves, and the light control layer 300 is configured to have a greater absorption rate for P waves in the light emitted by the display panel 100 than for S waves. Therefore, after passing through the light control layer 300, the light will penetrate and become polarized light dominated by S waves. In some embodiments, the light control layer 300 has a penetration rate of less than 25% for P waves at a 30-degree tilt angle in visible light, and a penetration rate of greater than 35% for S waves at a 30-degree tilt angle in visible light.

[0065] In some embodiments, by adjusting the absorption axis of the light control layer 300, the light control layer 300 can allow S waves to penetrate while absorbing P waves. Specifically, in this embodiment, the angle between the absorption axis of the light control layer 300 and the normal direction 502 (i.e., the Z-axis direction) of the light control layer is less than or equal to 10 degrees, preferably 0 degrees. In some embodiments, in addition to having an absorption axis substantially parallel to the normal direction 502, the light control layer 300 may also have another absorption axis (e.g., an absorption axis parallel to the X-axis direction) on a plane of the light control layer 300 perpendicular to the normal direction 502. Therefore, the light control layer 300 can absorb the polarization state in the Z-axis direction and the polarization state in the X-axis direction of the light.

[0066] The first optical compensation film 410A may also be referred to as a phase delay film. The refractive indices of the first optical compensation film 410A in the xyz direction are nx1, ny1, and nz1, respectively, wherein the direction of nz1 is parallel to the normal direction of the first optical compensation film 410A. The in-plane phase delay R0 of the first optical compensation film 410A is equal to (nx1-ny1)d1, wherein d1 is the thickness of the first optical compensation film 410A. In some embodiments, d1 is from 100nm to 200μm. In this embodiment, the absolute value of the in-plane phase delay R0 of the first optical compensation film 410A is greater than 130nm and less than 550nm. In this embodiment, the light absorption structure 20A includes a single-layer phase delay film (ie, the first optical compensation film 410A), but the present invention is not limited thereto. In other embodiments, the light absorption structure 20A includes a multilayer phase delay film.

[0067] In some embodiments, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410A is greater than or equal to the absolute value of the in-plane phase retardation R0 of the 1 / 4 wavelength wave plate (about 137.5nm). In some embodiments, the first optical compensation film 410A may be a 1 / 2 (or x+1 / 2) wavelength wave plate, where x is an integer. In this case, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410A is about 275nm.

[0068] The anti-reflection film 500 is optionally disposed on the first optical compensation film 410A. In the present embodiment, the anti-reflection film 500 is located on the light absorption structure 20A, and the light absorption structure 20A is located between the anti-reflection film 500 and the display panel 10. The anti-reflection film 500 may have a single-layer structure or a multi-layer structure. In some embodiments, the anti-reflection film 500 may be a moth-eye anti-reflection film (Moth-Eye Anti-Reflective Coating).

[0069] Figure 1 Several paths of the light emitted by the light emitting diode 190 are shown. Light 610 is emitted in a direction perpendicular to the first surface 11, while light 710 is emitted in a direction with a large angle. Light 610 and light 710 are non-polarized light. The light control layer 300 absorbs most of the P waves in the light 710. In some embodiments, the light 720 passing through the light control layer 300 is linearly polarized light of S waves or polarized light of S waves mixed with a small amount of P waves. In some embodiments, when the absorption axis of the light control layer 300 is not completely parallel to the normal direction 502, part of the light 620 may also be absorbed.

[0070] The polarization patterns of the light 620 and the light 720 are changed after passing through the first optical compensation film 410A, so that they are transformed into the light 630 and the light 730. In some embodiments, since the light 620 and the light 720 enter the first optical compensation film 410A at different angles and are transformed into the light 630 and the light 730, the light 630 and the light 730 may have different degrees of phase delay. In some embodiments, at the interface between the first optical compensation film 410A and the anti-reflection film 500 (air in the absence of the anti-reflection film 500), the light 730 is, for example, circularly polarized light or elliptically polarized light.

[0071] Since the light 630 leaves the first optical compensation film 410A in a nearly vertical direction, the light 630 will not be significantly reflected at the interface between the first optical compensation film 410A and the anti-reflection film 500 (or air). In contrast, since the light 730 reaches the interface between the anti-reflection film 500 and the air (the interface between the first optical compensation film 410A and the air in the absence of the anti-reflection film 500) at a larger angle, the light 730 will be divided into the light 740 that leaves the first optical compensation film 410A and enters the air and the reflected light 750 at the interface between the first optical compensation film 410A and the air or the interface between the anti-reflection film 500 and the air.

[0072] The reflected light 750 has a circular polarization direction opposite to that of the light 730 , and after passing through the first optical compensation film 410A again, the first optical compensation film 410A converts the light 750 into linearly polarized light of P wave or polarized light of P wave mixed with a small amount of S wave.

[0073] Since the light control layer 300 has a relatively large absorptivity for P-waves, most of the light 750 will be absorbed by the light control layer 300, thereby reducing the backside light leakage problem of the display device 1A.

[0074] Figure 2 is a cross-sectional schematic diagram of a display device 1B according to an embodiment of the present invention. It must be noted here that: Figure 2 The implementation examples are used Figure 1 The component numbers and partial contents of the embodiments are the same, wherein the same or similar numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. The description of the omitted parts can be referred to the aforementioned embodiments, and will not be repeated here.

[0075] Figure 2 The display device 1B and Figure 1 The difference between the display device 1A and the display device 1B is that the light absorption structure 20B of the display device 1B includes a light control layer 300 and a first optical compensation film 410B and a second optical compensation film 420B overlapped with the light control layer 300 .

[0076] The second optical compensation film 420B is located on the first optical compensation film 410B, and the first optical compensation film 410B is located between the light control layer 300 and the second optical compensation film 420B.

[0077] In the present embodiment, the first optical compensation film 410B and the second optical compensation film 420B can both be referred to as phase delay films. The refractive indexes of the first optical compensation film 410B in the xyz direction are nx1, ny1, and nz1, respectively, wherein the direction of nz1 is parallel to the normal direction of the first optical compensation film 410B. The refractive indexes of the second optical compensation film 420B in the xyz direction are nx2, ny2, and nz2, respectively, wherein the direction of nz2 is parallel to the normal direction of the second optical compensation film 420B. The in-plane phase delay R0 of the first optical compensation film 410B is equal to (nx1-ny1)d1, wherein d1 is the thickness of the first optical compensation film 410B. The in-plane phase delay R0 of the second optical compensation film 420B is equal to (nx2-ny2)d2, wherein d2 is the thickness of the second optical compensation film 420B. In some embodiments, d1 and d2 are each 100nm to 200μm. In the present embodiment, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410B and the in-plane phase retardation R0 of the second optical compensation film 420B is greater than 130nm and less than 550nm. For example, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410B and the in-plane phase retardation R0 of the second optical compensation film 420B are both within the range of 195nm to 350nm, for example, about 270nm. In some embodiments, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410B and the second optical compensation film 420B is greater than or equal to the absolute value of the in-plane phase retardation R0 of the 1 / 4 wavelength wave plate (about 137.5nm). In some embodiments, the first optical compensation film 410B and the second optical compensation film 420B can both be called 1 / 2 (or x+1 / 2) wavelength wave plates. The angle between the slow axis of the first optical compensation film 410B and the slow axis of the second optical compensation film 420B is in the range of 30° to 60°, for example, about 45 degrees.

[0078] Figure 2 Several paths of the light emitted by the light emitting diode 190 are shown. Light 610 is emitted in a direction perpendicular to the first surface 11, while light 710 is emitted in a direction with a large angle. Light 610 and light 710 are non-polarized light. The light control layer 300 absorbs most of the P waves in the light 710. In some embodiments, the light 720 passing through the light control layer 300 is linearly polarized light of S waves or polarized light of S waves mixed with a small amount of P waves. In some embodiments, when the absorption axis of the light control layer 300 is not completely parallel to the normal direction, part of the light 620 may also be absorbed.

[0079] The polarization patterns of the light 620 and the light 720 are changed after passing through the first optical compensation film 410B and the second optical compensation film 420B, so that they are transformed into the light 630 and the light 730. In some embodiments, since the light 620 and the light 720 enter the first optical compensation film 410B and the second optical compensation film 420B at different angles and are transformed into the light 630 and the light 730, the light 630 and the light 730 may have different degrees of phase delay. In some embodiments, at the interface between the second optical compensation film 420B and the air, the light 730 is, for example, a linearly polarized light of a P wave or a polarized light of a P wave mixed with a small amount of an S wave.

[0080] Since the light 630 leaves the second optical compensation film 420B in a nearly vertical direction, the light 630 will not be significantly reflected at the interface between the second optical compensation film 420B and the air. In contrast, since the light 730 reaches the interface between the second optical compensation film 420B and the air at a larger angle, the light 730 will be divided into the light 740 leaving the second optical compensation film 420B and the reflected light 750 at the interface between the second optical compensation film 420B and the air. In this embodiment, the P wave has a higher transmittance at the interface between the second optical compensation film 420B and the air. Since the light 730 is substantially a P wave at the interface between the second optical compensation film 420B and the air, most of the light 730 can leave the first optical compensation film 410A and form the light 740.

[0081] Since most of the P waves leave the first optical compensation film 410A, the reflected light 750 includes S waves mixed with a small amount of P waves, and after passing through the first optical compensation film 410B and the second optical compensation film 420B again, the first optical compensation film 410B and the second optical compensation film 420B will convert the light 750 into polarized light with P waves mixed with a small amount of S waves.

[0082] Since the light control layer 300 has a relatively large absorptivity for P-waves, most of the light 750 will be absorbed by the light control layer 300, thereby reducing the backside light leakage problem of the display device 1B.

[0083] Matching Figure 2From the perspective of the embodiment of Table 1, Table 2 and Table 3, the light emitted by the light emitting diode 190 passes through the light control layer 300 and the compensation structure composed of the first optical compensation film 410B and the second optical compensation film 420B in sequence. Table 1, Table 2 and Table 3 show the situation of the light in each film layer of the display device 1B in one embodiment of the present invention. In Table 1, Table 2 and Table 3, it is assumed that the film layers other than the light control layer 300 and the compensation structure (i.e., the first optical compensation film 410B and the second optical compensation film 420B) do not absorb light, and the in-plane phase retardation R0 of the first optical compensation film 410B and the second optical compensation film 420B is 270nm, and the angle between the slow axis of the first optical compensation film 410B and the slow axis of the second optical compensation film 420B is 45 degrees. In the embodiments of Table 1, Table 2 and Table 3, the transmittance of the display device 1B at the normal viewing angle is 76%. Table 1 shows the percentage of light emitted by the light emitting diode after passing through each film layer at an exit angle of 30 degrees.

[0084] Table 1

[0085]

[0086] Table 2 shows the percentage of light emitted by the LED after it is reflected at the interface between the compensation structure and the air at a reflection angle of 30 degrees and re-passes through each film layer at an incident angle of 30 degrees. Continuing with the results of Table 1, about 0.891% of the P wave and 2.502% of the S wave of the light are reflected at the interface between the compensation structure and the air.

[0087] Table 2

[0088]

[0089]

[0090] It can be seen from Table 1 and Table 2 that the light control layer 300 and the compensation structure (ie, the first optical compensation film 410B and the second optical compensation film 420B) can significantly reduce backside light leakage, thereby improving the visual effect of the display device.

[0091] Matching Figure 2 From the perspective of the external light entering the display device 1B from the back side of the display device 1B, it can leave from the front side of the display device 1B after passing through each film layer. Table 3 shows the percentage of the external light remaining after passing through each film layer at an exit angle of 30 degrees. In Table 3, it is assumed that the light does not pass through any opaque element.

[0092] Table 3

[0093]

[0094]

[0095] From Table 3, it can be seen that the display device 1B has a transmittance of about 40% at a viewing angle (tilt angle (theta)) of 30 degrees.

[0096] Figure 3 is a cross-sectional schematic diagram of a display device 1C according to an embodiment of the present invention. It must be noted here that Figure 3 The implementation examples are used Figure 2 The component numbers and partial contents of the embodiments are the same, wherein the same or similar numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. The description of the omitted parts can be referred to the aforementioned embodiments, and will not be repeated here.

[0097] Figure 3 The display device 1C and Figure 2 The difference between the display device 1B and the display device 1C is that the light absorption structure 20C of the display device 1C includes a light control layer 300 and a first optical compensation film 410C and a second optical compensation film 420C overlapping the light control layer 300. The light absorption structure 20C is located on the second surface 12, and the first optical compensation film 410C and the second optical compensation film 420C are located between the light control layer 300 and the circuit substrate 100. The first optical compensation film 410C is located between the light control layer 300 and the second optical compensation film 420C. In some embodiments, the display device 1C further includes an anti-reflection film (not shown) disposed on the first surface 11 of the display panel 10, wherein the display panel 10 is located between the anti-reflection film and the light absorption structure 20C.

[0098] In the present embodiment, the first optical compensation film 410C and the second optical compensation film 420C can both be referred to as phase delay films. The refractive indexes of the first optical compensation film 410C in the xyz direction are nx1, ny1, and nz1, respectively, wherein the direction of nz1 is parallel to the normal direction of the first optical compensation film 410C. The refractive indexes of the second optical compensation film 420C in the xyz direction are nx2, ny2, and nz2, respectively, wherein the direction of nz2 is parallel to the normal direction of the second optical compensation film 420C. The in-plane phase delay R0 of the first optical compensation film 410C is equal to (nx1-ny1)d1, wherein d1 is the thickness of the first optical compensation film 410C. The in-plane phase delay R0 of the second optical compensation film 420C is equal to (nx2-ny2)d2, wherein d2 is the thickness of the second optical compensation film 420C. In the present embodiment, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410C and the in-plane phase retardation R0 of the second optical compensation film 420C is greater than 130nm and less than 550nm. For example, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410C and the in-plane phase retardation R0 of the second optical compensation film 420C are both in the range of 195nm to 350nm, for example, about 270nm. In some embodiments, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410C and the second optical compensation film 420C is greater than or equal to the absolute value of the in-plane phase retardation R0 of the 1 / 4 wavelength wave plate (about 137.5nm). In some embodiments, the first optical compensation film 410C and the second optical compensation film 420C can both be called 1 / 2 (or x+1 / 2) wavelength wave plates, where x is an integer. The angle between the slow axis of the first optical compensation film 410C and the slow axis of the second optical compensation film 420C is in the range of 30° to 60°, for example, about 45 degrees.

[0099] Figure 3 Several paths of the light emitted by the light emitting diode 190 are shown. The light 610 is emitted in a direction perpendicular to the first surface 11, while the light 710 is emitted in a direction with a large angle. The light 610 and the light 710 are non-polarized lights.

[0100] Since the light 610 leaves the cover plate 220 in a nearly vertical direction, the light 610 will not be significantly reflected at the interface between the cover plate 220 and the air. In contrast, since the light 710 reaches the interface between the cover plate 220 and the air at a larger angle, the light 710 will be divided into the light 740 leaving the cover plate 220 and the reflected light 750 at the interface between the cover plate 220 and the air. In this embodiment, the P wave has a higher penetration rate at the interface between the cover plate 220 and the air. Therefore, the reflected light 750 is a linearly polarized light of the S wave or a polarized light of the S wave mixed with a smaller amount of the P wave than the S wave, while the light 740 is a linearly polarized light of the P wave or a polarized light of the P wave mixed with a smaller amount of the S wave than the P wave.

[0101] After the reflected light 750 passes through the cover plate 220 again, it reaches the interface between the substrate 110 and the second optical compensation film 420C. Then, the polarization type of the light 750 is changed after passing through the second optical compensation film 420C and the first optical compensation film 410C, so that it is converted into light 760. In some embodiments, at the interface between the first optical compensation film 410C and the light control layer 300, the light 760 is, for example, a linearly polarized light of a P wave or a polarized light of a P wave mixed with a small amount of an S wave.

[0102] The light control layer 300 absorbs most of the P wave in the light 760 , so that most of the light 760 will be absorbed by the light control layer 300 , thereby reducing the back light leakage problem of the display device 1C.

[0103] Matching Figure 3 From the perspective of light, the light emitted by the light emitting diode 190 can enter the air after passing through the cover plate 220. Tables 4, 5 and 6 show the situation of light in each film layer of the display device 1C in one embodiment of the present invention. In Tables 4, 5 and 6, it is assumed that the film layers other than the light control layer 300 and the compensation structure (i.e., the first optical compensation film 410C and the second optical compensation film 420C) do not absorb light, and the in-plane phase retardation R0 of the first optical compensation film 410C and the second optical compensation film 420C is 270nm, and the angle between the slow axis of the first optical compensation film 410C and the slow axis of the second optical compensation film 420C is 45 degrees. In the embodiments of Tables 4, 5 and 6, the transmittance of the display device 1C at a positive viewing angle is 76%. Table 4 shows the percentage of light emitted by the light emitting diode after passing through each film layer at an exit angle of 30 degrees.

[0104] Table 4

[0105]

[0106]

[0107] It can be seen from Table 4 that the light absorption structure 20C of the display device 1C is disposed on the second surface 12 of the display panel 100 , which can increase the amount of light entering the air from the front side.

[0108] Table 5 shows the percentage of light emitted by the LED after it is reflected at the interface between the cover plate and the air at a reflection angle of 30 degrees and re-passes through each film layer at an incident angle of 30 degrees. Continuing with the results of Table 4, about 1% of the P wave and 20% of the S wave of the light are reflected at the interface between the cover plate and the air.

[0109] Table 5

[0110]

[0111] It can be seen from Table 4 and Table 5 that the light control layer 300 and the compensation structure (ie, the first optical compensation film 410C and the second optical compensation film 420C) can significantly reduce back-side light leakage, thereby improving the visual effect of the display device 1C.

[0112] Matching Figure 3 From the perspective of the external light entering the display device 1C from the back side of the display device 1C, after passing through each film layer, it can leave from the front side of the display device 1C. Table 6 shows the percentage of the external light remaining after passing through each film layer at an exit angle of 30 degrees in one embodiment. In Table 6, it is assumed that the light does not pass through any opaque element.

[0113] Table 6

[0114]

[0115] From Table 6, it can be seen that the display device 1C has a transmittance of about 40% at a viewing angle of 30 degrees.

[0116] Table 7, Table 8 and Table 9 show the situation of light in each film layer of the display device 1C in another embodiment of the present invention. The difference between the embodiments of Table 7, Table 8 and Table 9 and the embodiments of Table 4, Table 5 and Table 6 is that: in the embodiments of Table 7, Table 8 and Table 9, the concentration of the absorption material in the light control layer is increased, so that the transmittance of the display device 1C at a normal viewing angle is 63%. Table 7 shows the percentage of light emitted by the light emitting diode after passing through each film layer at an exit angle of 30 degrees.

[0117] Table 7

[0118]

[0119]

[0120] It can be seen from Table 7 that the light absorption structure 20C of the display device 1C is disposed on the second surface 12 of the display panel 100 , which can increase the amount of light entering the air from the front side.

[0121] Table 8 shows the percentage of light emitted by the LED after it is reflected at the interface between the cover plate and the air at a reflection angle of 30 degrees and re-passes through each film layer at an incident angle of 30 degrees. Continuing with the results of Table 7, about 1% of the P wave and 20% of the S wave of the light are reflected at the interface between the cover plate and the air.

[0122] Table 8

[0123]

[0124] It can be seen from Table 7 and Table 8 that the light control layer 300 and the compensation structure (ie, the first optical compensation film 410C and the second optical compensation film 420C) can significantly reduce back-side light leakage, thereby improving the visual effect of the display device 1C.

[0125] Matching Figure 3 From the perspective of the external light entering the display device 1C from the back side of the display device 1C, after passing through each film layer, it can leave from the front side of the display device 1C. Table 9 shows the percentage of the external light remaining after passing through each film layer at an exit angle of 30 degrees in one embodiment. In Table 9, it is assumed that the light does not pass through any opaque element.

[0126] Table 9

[0127]

[0128]

[0129] From Table 9, it can be seen that the display device 1C has a transmittance of about 32% at a viewing angle of 30 degrees.

[0130] Figure 4 is a cross-sectional schematic diagram of a display device 1D according to an embodiment of the present invention. It must be noted here that Figure 4 The implementation examples are used Figure 3 The component numbers and partial contents of the embodiments are the same, wherein the same or similar numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. The description of the omitted parts can be referred to the aforementioned embodiments, and will not be repeated here.

[0131] Figure 4 The display device 1D and Figure 3 The difference between the display device 1C and the display device 1D is that the light absorption structure 20D of the display device 1D includes a light control layer 300 and a first optical compensation film 410D, a second optical compensation film 420D, a third optical compensation film 430D and a fourth optical compensation film 440D overlapping the light control layer 300. The light absorption structure 20D is located on the second surface 12, and the first optical compensation film 410D and the second optical compensation film 420D are located between the light control layer 300 and the circuit substrate 100. The first optical compensation film 410D is located between the light control layer 300 and the second optical compensation film 420D. The third optical compensation film 430D is located on the light control layer 300, and the light control layer 300 is located between the first optical compensation film 410D and the third optical compensation film 430D. The fourth optical compensation film 440D is located on the third optical compensation film 430D, and the third optical compensation film 430D is located between the light control layer 300 and the fourth optical compensation film 440D.

[0132] In the present embodiment, the first optical compensation film 410D, the second optical compensation film 420D, the third optical compensation film 430D and the fourth optical compensation film 440D can all be referred to as phase delay films. The refractive indexes of the first optical compensation film 410D in the xyz direction are nx1, ny1 and nz1, respectively, wherein the direction of nz1 is parallel to the normal direction of the first optical compensation film 410D. The refractive indexes of the second optical compensation film 420D in the xyz direction are nx2, ny2 and nz2, respectively, wherein the direction of nz2 is parallel to the normal direction of the second optical compensation film 420D. The refractive indexes of the third optical compensation film 430D in the xyz direction are nx3, ny3 and nz3, respectively, wherein the direction of nz3 is parallel to the normal direction of the third optical compensation film 430D. The refractive indexes of the fourth optical compensation film 440D in the xyz direction are nx4, ny4 and nz4, respectively, wherein the direction of nz4 is parallel to the normal direction of the fourth optical compensation film 440D. The in-plane phase retardation R0 of the first optical compensation film 410D is equal to (nx1-ny1)d1, where d1 is the thickness of the first optical compensation film 410D. The in-plane phase retardation R0 of the second optical compensation film 420D is equal to (nx2-ny2)d2, where d2 is the thickness of the second optical compensation film 420D. The in-plane phase retardation R0 of the third optical compensation film 430D is equal to (nx3-ny3)d3, where d3 is the thickness of the third optical compensation film 430D. The in-plane phase retardation R0 of the fourth optical compensation film 440D is equal to (nx4-ny4)d4, where d4 is the thickness of the second optical compensation film 420D. In some embodiments, d1, d2, d3 and d4 are each 100nm to 200μm. In the present embodiment, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410D, the absolute value of the in-plane phase retardation R0 of the second optical compensation film 420D, the absolute value of the in-plane phase retardation R0 of the third optical compensation film 430D, and the absolute value of the in-plane phase retardation R0 of the fourth optical compensation film 440D are greater than 130nm and less than 550nm. For example, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410D, the absolute value of the in-plane phase retardation R0 of the second optical compensation film 420D, the absolute value of the in-plane phase retardation R0 of the third optical compensation film 430D, and the absolute value of the in-plane phase retardation R0 of the fourth optical compensation film 440D are all within the range of 195nm to 350nm, for example, about 270nm. In some embodiments, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410D, the absolute value of the in-plane phase retardation R0 of the second optical compensation film 420D, the absolute value of the in-plane phase retardation R0 of the third optical compensation film 430D, and the absolute value of the in-plane phase retardation R0 of the fourth optical compensation film 440D are greater than or equal to the absolute value of the in-plane phase retardation R0 of a 1 / 4 wavelength wave plate (approximately 137.5 nm).In some embodiments, the first optical compensation film 410D, the second optical compensation film 420D, the third optical compensation film 430D, and the fourth optical compensation film 440D can all be referred to as 1 / 2 (or x+1 / 2) wavelength wave plates. The angle between the slow axis of the first optical compensation film 410D and the slow axis of the second optical compensation film 420D is in the range of 30° to 60°, for example, about 45 degrees. The angle between the slow axis of the third optical compensation film 430D and the slow axis of the fourth optical compensation film 440D is in the range of 30° to 60°, for example, about 45 degrees.

[0133] Matching Figure 4 From the perspective of the light emitted by the light emitting diode 190, the light can enter the air after passing through the cover plate 220. Tables 10, 11 and 12 show the situation of light in each film layer of the display device 1D in one embodiment of the present invention. In Tables 10, 11 and 12, it is assumed that the film layers other than the light control layer 300, the first compensation structure (i.e., the first optical compensation film 410D and the second optical compensation film 420D) and the second compensation structure (i.e., the third optical compensation film 430D and the fourth optical compensation film 440D) do not absorb light, and the in-plane phase retardation R0 of the first optical compensation film 410D, the second optical compensation film 420D, the third optical compensation film 430D and the fourth optical compensation film 440D is 270nm, and the angle between the slow axis of the first optical compensation film 410D and the slow axis of the second optical compensation film 420D is 45 degrees, and the angle between the slow axis of the third optical compensation film 430D and the slow axis of the fourth optical compensation film 440D is 45 degrees. In the embodiments of Table 10, Table 11 and Table 12, the transmittance of the display device 1D at a normal viewing angle is 76%. Table 10 shows the percentage of light remaining after the light emitted by the light emitting diode passes through each film layer at an exit angle of 30 degrees.

[0134] Table 10

[0135]

[0136] It can be seen from Table 10 that the light absorption structure 20D of the display device 1D is disposed on the second surface 12 of the display panel 100 , which can increase the amount of light entering the air from the front side.

[0137] Table 11 shows the percentage of light emitted by the LED after it is reflected at the interface between the compensation structure and the air at a reflection angle of 30 degrees and re-passes through each film layer at an incident angle of 30 degrees. Continuing with the results of Table 10, about 1% of the P wave and 20% of the S wave of the light are reflected at the interface between the compensation structure and the air.

[0138] Table 11

[0139]

[0140]

[0141] It can be seen from Tables 10 and 11 that the light control layer 300, the first compensation structure (i.e., the first optical compensation film 410D and the second optical compensation film 420D) and the second compensation structure (i.e., the third optical compensation film 430D and the fourth optical compensation film 440D) can slightly reduce the back side light leakage, thereby improving the visual effect of the display device 1D.

[0142] Matching Figure 4 From the perspective of the external light entering the display device 1D from the back side of the display device 1D, it can leave from the front side of the display device 1D after passing through each film layer. Table 12 shows the percentage of the external light remaining after passing through each film layer at an exit angle of 30 degrees in one embodiment. In Table 12, it is assumed that the light does not pass through any opaque element.

[0143] Table 12

[0144]

[0145]

[0146] It can be seen from Table 12 that the transmittance of the display device 1D increases significantly to about 47% at a viewing angle of 30 degrees.

[0147] Figure 5 is a cross-sectional schematic diagram of a display device 1E according to an embodiment of the present invention. It must be noted here that Figure 5 The implementation examples are used Figure 1 The component numbers and partial contents of the embodiments are the same, wherein the same or similar numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. The description of the omitted parts can be referred to the aforementioned embodiments, and will not be repeated here.

[0148] Figure 5 The display device 1E and Figure 1 The difference between the display device 1A and the display device 1E is that the light absorption structure 20E of the display device 1E includes a light control layer 300 and a first optical compensation film 410E, a second optical compensation film 420E and a third optical compensation film 430E overlapping the light control layer 300. The light absorption structure 20E is located on the first surface 11. The second optical compensation film 420E is located on the first optical compensation film 410E, and the first optical compensation film 410E is located between the light control layer 300 and the second optical compensation film 420E. The third optical compensation film 430E is located on the second optical compensation film 420E, and the second optical compensation film 420E is located between the first optical compensation film 410E and the third optical compensation film 430E.

[0149] In the present embodiment, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410E, the absolute value of the in-plane phase retardation R0 of the second optical compensation film 420E, and the absolute value of the in-plane phase retardation R0 of the third optical compensation film 430E are greater than 130nm and less than 550nm. For example, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410E, the absolute value of the in-plane phase retardation R0 of the second optical compensation film 420E, and the absolute value of the in-plane phase retardation R0 of the third optical compensation film 430E are all in the range of 130nm to 195nm. In some embodiments, the absolute value of the in-plane phase retardation R0 of the first optical compensation film 410E, the absolute value of the in-plane phase retardation R0 of the second optical compensation film 420E, and the absolute value of the in-plane phase retardation R0 of the third optical compensation film 430E are greater than or equal to the absolute value of the in-plane phase retardation R0 of the 1 / 4 wavelength wave plate (about 137.5nm). The angle between the slow axis of the first optical compensation film 410E and the slow axis of the second optical compensation film 420E is in the range of 60° to 120°. The angle between the slow axis of the second optical compensation film 420E and the slow axis of the third optical compensation film 430E is in the range of 60° to 120°.

[0150] Fig. 6A FIG. 3 is a cross-sectional schematic diagram of a light control layer 300 of a display device according to an embodiment of the present invention. Figure 6B 3 is a cross-sectional schematic diagram of a liquid crystal molecule in a light control layer according to an embodiment of the present invention. In some embodiments, the light control layer 300 is an electrically controlled birefringence (ECB) liquid crystal cell, a multi-domain vertically aligned (MVAB) liquid crystal cell, or an LCP (Liquid Crystal Polymer) or other types of liquid crystal cells.

[0151] Please refer to Fig. 6A and Figure 6B , the light control layer 300 includes a plurality of liquid crystal molecules 310 and a dye 320. In some embodiments, the liquid crystal molecules 310 in the light control layer 300 can be regulated by voltage, so that the light control layer 300 can convert the polarization state of light with a large viewing angle into linear polarization.

[0152] The liquid crystal molecules 310 have a major axis LD and a minor axis SD. The angle α between the direction of the major axis of the liquid crystal molecules 310 and the normal direction ND of the light control layer 300 is substantially less than or equal to 10 degrees. Thereby, the angle between the absorption axis of the light control layer 300 and the normal direction ND is less than or equal to 10 degrees, so as to absorb the polarized light with the polarization axis being the Z axis. Absorbing the polarized light with the polarization axis being the Z axis can provide the best optical effect at the expense of the minimum transmittance.

[0153] Figure 7 It is a simulation diagram of the backlight leakage brightness of a display device according to an embodiment of the present invention, the thickness direction phase retardation Rth and the in-plane phase retardation R0 of the first optical compensation film. Figure 7 For the sectional view of the display device, reference can be made to Figure 1 the display device 1A, and Figure 7 shows the minimum brightness of the backlight leakage at the azimuth angle (phi) of 0° to 360° when the tilt angle (theta) is 75°.

[0154] Please refer to Figure 1 and Figure 7 , adjusting the thickness direction phase retardation Rth and the in-plane phase retardation R0 of the first optical compensation film 410A will affect the backlight leakage brightness of the display device 1A. The thickness direction phase retardation Rth of the first optical compensation film 410A is equal to (nx1 - nz1)d1, and the in-plane phase retardation R0 is equal to (nx1 - ny1)d1, where d1 is the thickness of the first optical compensation film 410B.

[0155] From Figure 7 it can be seen that within some ranges of Rth and R0, the backlight leakage of the display device 1A can be less than 20 nits.

[0156] When the R0 of the first optical compensation film 410A is positive, the first optical compensation film 410A can make the backlight leakage of the display device 1A smaller when meeting the following conditions:

[0157] The thickness direction phase retardation Rth is less than 150 nm, and 130 nm < R0 < (340 + (150 - Rth) × cot50°) nm; or

[0158] The thickness direction phase retardation Rth is greater than 150 nm, and 130 nm < R0 < (340 + (Rth - 150) × cot60°) nm.

[0159] When the R0 of the first optical compensation film 410A is negative, the first optical compensation film 410A can make the backlight leakage of the display device 1A smaller when meeting the following conditions:

[0160] The thickness direction phase retardation Rth is less than 150nm, and -130nm>R0>-[(340+(150-Rth)×cot 50°)]nm; or

[0161] The thickness direction phase retardation Rth is greater than 150nm, and -130nm>R0>-[(340+(Rth-150)×cot 60°)]nm.

[0162] Fig. 8A The relative brightness distribution of a display device at each viewing angle according to an embodiment of the present invention is shown. Figure 8B 4 is a graph showing a tilt angle (theta) and backside light leakage of a display device when the azimuth angle (phi) is 0° according to an embodiment of the present invention. Fig. 8A and Figure 8B Corresponding Figure 1 The display device 1A, wherein R0 of the first optical compensation film 410A is -250 nm. Nz of the first optical compensation film 410A is 0.6, wherein Nz is equal to R0 / Rth. Rth' of the first optical compensation film 410A is -275 nm, wherein Rth' is equal to ((nx1+ny1) / 2-nz1)d1. Fig. 8A and Figure 8B In the embodiment of the present invention, the brightness of the display device at a normal viewing angle is 1000 nits. In the present embodiment, in the range of the tilt angle of 0° to 81° and the azimuth angle of 0° to 360°, the maximum backside light leakage is 111.2 nits, and the minimum backside light leakage is 0. In the present embodiment, the light leakage value at a normal viewing angle is 0.2 nits.

[0163] Fig.9A The relative brightness distribution of a display device at each viewing angle according to an embodiment of the present invention is shown. Fig. 9B 4 is a graph showing a tilt angle (theta) and backside light leakage of a display device when the azimuth angle (phi) is 0° according to an embodiment of the present invention. Fig.9A and Fig. 9B It also corresponds Figure 1 The display device 1A of FIG. 1A is different in that the properties of the first optical compensation film 410A are adjusted. Fig.9A and Fig. 9B In the embodiment of the first optical compensation film 410A, R0 is -310nm, Rth is -60nm, and Rth' is 9.5nm. Fig.9A and Fig. 9B In the embodiment of the present invention, the brightness of the display device at a normal viewing angle is 1000 nits.

[0164] Fig. 10AThe relative brightness distribution of a display device at each viewing angle according to an embodiment of the present invention is shown. Fig. 10B 4 is a graph showing a tilt angle (theta) and backside light leakage of a display device when the azimuth angle (phi) is 0° according to an embodiment of the present invention. Fig. 10A and Fig. 10B Corresponding Figure 2 The display device 1B, wherein the R0 of the first optical compensation film 410B is 270 nm, and the R0 of the second optical compensation film 420B is 270 nm. The angle between the slow axis of the first optical compensation film 410B and the slow axis of the second optical compensation film 420B is 45 degrees. Fig. 10A and Fig. 10B In the embodiment of the present invention, the brightness of the display device at a normal viewing angle is 1000 nits.

[0165] In summary, the light absorption structure includes a light control layer and an optical compensation film. The angle between the absorption axis of the light control layer and the normal direction is less than or equal to 10 degrees, and the absolute value of the in-plane phase retardation R0 of the optical compensation film is greater than 130nm and less than 550nm. Therefore, the light absorption structure can be used to effectively improve the backside light leakage problem of the display device.

[0166] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A light absorbing structure for a display device, characterized in that: Comprising: A light control layer, wherein the angle between the absorption axis of the light control layer and the normal direction of the light control layer is less than or equal to 10 degrees; And A first optical compensation film, overlapping the light control layer, wherein the absolute value of the in-plane phase retardation R0 of the first optical compensation film is greater than 130 nm and less than 550 nm.

2. The light absorbing structure according to claim 1, characterized in that: Wherein the R0 of the first optical compensation film is positive, and the first optical compensation film meets the following conditions: The thickness direction phase retardation Rth is less than 150 nm, and 130 nm < R0 < (340 + (150 - Rth) × cot50°) nm; or The thickness direction phase retardation Rth is greater than 150 nm, and 130 nm < R0 < (340 + (Rth - 150) × cot60°) nm.

3. The light absorbing structure according to claim 1, characterized in that: Wherein the R0 of the first optical compensation film is negative, and the first optical compensation film meets the following conditions: The thickness direction phase retardation Rth is less than 150 nm, and -130 nm > R0 > -[(340 + (150 - Rth) × cot 50°)] nm; or The thickness direction phase retardation Rth is greater than 150 nm, and -130 nm > R0 > -[(340 + (Rth - 150) × cot 60°)] nm.

4. The light absorbing structure according to claim 1, wherein: Further comprising: A second optical compensation film, located on the first optical compensation film, and the first optical compensation film is located between the light control layer and the second optical compensation film, wherein the angle between the slow axis of the first optical compensation film and the slow axis of the second optical compensation film is in the range of 30° to 60°, and wherein the absolute value of the in-plane phase retardation R0 of the first optical compensation film and the absolute value of the in-plane phase retardation R0 of the second optical compensation film are in the range of 195 nm to 350 nm.

5. The light absorbing structure according to claim 1, characterized in that: Further comprising: A second optical compensation film, located on the first optical compensation film, and the first optical compensation film is located between the light control layer and the second optical compensation film, wherein the angle between the slow axis of the first optical compensation film and the slow axis of the second optical compensation film is 60° to 120°; and A third optical compensation film, located on the second optical compensation film, and the second optical compensation film is located between the first optical compensation film and the third optical compensation film, wherein the angle between the slow axis of the second optical compensation film and the slow axis of the third optical compensation film is 60° to 120°, and wherein the absolute value of the in-plane phase retardation R0 of the first optical compensation film, the absolute value of the in-plane phase retardation R0 of the second optical compensation film, and the absolute value of the in-plane phase retardation R0 of the third optical compensation film are in the range of 130 nm to 195 nm.

6. The light absorbing structure according to claim 1, characterized in that: Wherein the light control layer comprises a plurality of liquid crystal molecules and dyes, and the angle between the direction of the long axis of the liquid crystal molecules and the normal direction of the light control layer is substantially less than or equal to 10 degrees.

7. The light absorbing structure according to claim 1, characterized in that: Wherein the light absorption structure is disposed in or on a display panel.

8. A display device, characterized in that: Comprising: A display panel, having a first surface and a second surface opposite to the first surface, wherein the first surface is the display surface of the display panel; And A light absorption structure, located on the first surface or the second surface of the display panel, and the light absorption structure comprises: a light control layer, wherein the angle between the absorption axis of the light control layer and the normal direction of the light control layer is less than or equal to 10 degrees; as well as A first optical compensation film is overlapped on the light control layer, wherein the absolute value of the in-plane phase retardation R0 of the first optical compensation film is greater than 130nm and less than 550nm.

9. The display device according to claim 8, wherein: Also includes: An anti-reflection film is located on the first surface of the display panel, wherein: When the light absorption structure is located on the first surface of the display panel, the light absorption structure is located between the anti-reflection film and the display panel; and When the light absorption structure is located on the second surface of the display panel, the display panel is located between the anti-reflection film and the light absorption structure.

10. The display device according to claim 8, wherein: Also includes: A second optical compensation film is located on the first optical compensation film, and the first optical compensation film is located between the light control layer and the second optical compensation film, wherein the angle between the slow axis of the first optical compensation film and the slow axis of the second optical compensation film is in the range of 30° to 60°.

11. The display device according to claim 10, wherein: The light absorption structure is located on the second surface of the display panel, and the light absorption structure further includes: a third optical compensation film, located on the light control layer, and the light control layer is located between the first optical compensation film and the third optical compensation film; and A fourth optical compensation film is located on the third optical compensation film, and the third optical compensation film is located between the light control layer and the fourth optical compensation film, wherein the angle between the slow axis of the third optical compensation film and the slow axis of the fourth optical compensation film is 30° to 60°.

12. The display device according to claim 10, wherein: The absolute value of the in-plane phase retardation R0 of the first optical compensation film and the absolute value of the in-plane phase retardation R0 of the second optical compensation film are in the range of 195 nm to 350 nm.

13. The display device according to claim 8, wherein: The light absorbing structure further comprises: a second optical compensation film, located on the first optical compensation film, and the first optical compensation film is located between the light control layer and the second optical compensation film, wherein the angle between the slow axis of the first optical compensation film and the slow axis of the second optical compensation film is 60° to 120°; and A third optical compensation film is located on the second optical compensation film, and the second optical compensation film is located between the first optical compensation film and the third optical compensation film, wherein the angle between the slow axis of the second optical compensation film and the slow axis of the third optical compensation film is 60° to 120°, and wherein the absolute value of the in-plane phase retardation R0 of the first optical compensation film, the absolute value of the in-plane phase retardation R0 of the second optical compensation film, and the absolute value of the in-plane phase retardation R0 of the third optical compensation film are in the range of 130nm to 195nm.

14. The display device according to claim 8, wherein: The display panel comprises: A circuit substrate having the second surface; a light emitting diode electrically connected to the circuit substrate; and A cover plate has the first surface, and the light emitting diode is located between the circuit substrate and the cover plate, wherein the light absorption structure is located on the first surface, and the light control layer is located between the first optical compensation film and the cover plate.

15. The display device according to claim 8, wherein: The display panel comprises: A circuit substrate having the second surface; a light emitting diode electrically connected to the circuit substrate; and A cover plate has the first surface, and the light emitting diode is located between the circuit substrate and the cover plate, wherein the light absorption structure is located on the second surface, and the first optical compensation film is located between the light control layer and the circuit substrate.

16. The display device according to claim 8, wherein: The absorption rate of the light control layer to the P wave in the light emitted by the display panel is greater than the absorption rate of the light control layer to the S wave in the light emitted by the display panel.

Images