GOB packaging structure based on display screen
By setting imaging holes and multiple light-absorbing layers in the GOB packaging structure of the display, the problem of insufficient contrast in the prior art is solved, and a significant improvement in contrast and display effect is achieved.
Patent Information
- Application Number
- CN202520097283.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-15
AI Technical Summary
Existing GOB packaging technology lags significantly behind in improving the contrast of LED displays, especially compared to traditional LED modules with masks, where the contrast ratio is still considerably lower.
In the GOB packaging structure of the display, an imaging hole is set between adjacent light-emitting units, and it is connected to two surfaces opposite to the lamp board on the light-transmitting layer. Combined with the design of multiple light-absorbing layers, including a first light-absorbing layer, a second light-absorbing layer and a third light-absorbing layer, the light-transmitting layer, the wall of the imaging hole and the projection area of the substrate surface are respectively covered to reduce light reflection and increase brightness difference.
By reducing light reflection and increasing brightness differences, the contrast of the display screen is significantly improved, especially in outdoor sunlight where the contrast of the module surface is greatly increased, thus improving the display effect.
Smart Images
Figure CN223810108U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to electronic display technical field especially, it relates to a GOB packaging structure based on display screen. BACKGROUND
[0002] GOB (Glue On Board) is a kind of packaging technology that can solve the protection problem of LED lamp, which adopts a special optical heat-conducting nanoscale transparent glue-filling material to package substrate and its LED packaging unit.Using GOB packaging technology can not only enhance the stability of LED display screen, but also play an effective protection role in waterproof, moisture-proof, dust-proof, anti-collision, anti-static and other aspects.
[0003] However, although the current GOB packaging process generally does the dull surface, matt surface treatment on the module surface to improve the color contrast of the product, reduce glare and dazzling feeling, but compared with the traditional LED module with mask, the contrast of the two is still very different. INVENTION CONTENTS
[0004] The technical problem to be solved by the utility model lies in providing a GOB packaging structure based on display screen to improve the contrast of GOB packaging display screen.
[0005] To solve the above technical problems, the utility model provides a GOB packaging structure based on display screen, which comprises a lamp plate and a light-transmitting layer, the light-transmitting layer covers the lamp plate, the lamp plate comprises a substrate and a light-emitting unit, the light-emitting unit is arranged on the substrate, the light-transmitting layer is provided with a radiographic hole, the radiographic hole is located between adjacent light-emitting units, and two surfaces of the light-transmitting layer opposite to the lamp plate are axially penetrated by the radiographic hole.
[0006] As an improvement of the above scheme, it further comprises a first light-absorbing layer, the first light-absorbing layer partially covers the surface of the light-transmitting layer away from the lamp plate, and the first light-absorbing layer is arranged staggeredly with the beam angle of the light-emitting unit.
[0007] As an improvement of the above scheme, it further comprises a second light-absorbing layer, the second light-absorbing layer covers the hole wall of the radiographic hole.
[0008] As an improvement of the above scheme, it further comprises a third light-absorbing layer, the projection area of the radiographic hole on the surface of the substrate is covered by the third light-absorbing layer.
[0009] As an improvement of the above scheme, the distance from the center of the light-emitting unit to the center of the radiographic hole is P, the maximum visible angle of the display screen is α, the diameter of the radiographic hole is W, and the thickness H of the light-transmitting layer is less than or equal to (P-W / 2) / tan (α / 2).
[0010] As the improvement of the above-mentioned scheme, the maximum visual angle of the display screen is 80-140°.
[0011] The beam angle of the light emitting unit is 110-120°.
[0012] As the improvement of the above-mentioned scheme, the thickness of the first light absorbing layer is 20-50μm.
[0013] As the improvement of the above-mentioned scheme, the refractive index of the light transmitting layer is 1.45-1.53.
[0014] As the improvement of the above-mentioned scheme, the light emitting units are arranged in a first array, the contrast holes are arranged in a second array, and the contrast holes are arranged at the centers of the four adjacent light emitting units.
[0015] As the improvement of the above-mentioned scheme, a circuit board is further included, and the substrate is connected with the circuit board.
[0016] The present application has the following advantages:
[0017] The utility model discloses a GOB packaging structure based on display screen, through setting the contrast hole between the adjacent light emitting unit in the light transmitting layer, the contrast hole is staggered with the light emitting unit, does not affect the packaging protection and the refraction of light of light emitting unit, and when the light in the environment is shot on the surface of display screen, because the contrast hole axially penetrates the two surfaces of light transmitting layer opposite the lamp panel, the depth of contrast hole makes the part light of the contrast hole will continuously reflect, absorbs in the contrast hole, reduces the light of the area of the contrast hole and emits, thereby makes the area opposite the light transmitting layer and the contrast hole form the brightness difference, and simultaneously because the contrast hole is straight through the surface of substrate, and the environmental light of the display screen surface generally projects from the oblique upper side or the oblique side, makes the upper part or one side of contrast hole form the shadow, this part shadow increases the brightness difference between the light emitting unit adjacent thereto, therefore, when the density of contrast hole is bigger, can large area increase the contrast of display surface. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is an embodiment structure schematic diagram of GOB packaging structure based on display screen of the utility model;
[0019] Figure 2 It is the A-A section view of Figure 1 ;
[0020] Figure 3 It is the D part enlarged structure schematic diagram of Figure 2 ;
[0021] Figure 4 It is the B-B section view of Figure 1 ;
[0022] Figure 5 is Figure 4 an enlarged structural schematic view of part E of
[0023] Figure 6 is Figure 5 an ambient light reflection schematic view of
[0024] Figure 7 is Figure 1 an enlarged structural schematic view of part C of
[0025] Figure 8 is a cross-sectional view through the axes of two adjacent contrast holes;
[0026] Figure 9 is Figure 1 a lighting schematic view of a display screen;
[0027] Figure 10 is a lighting schematic view of a prior display screen. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings.
[0029] As Figures 1 to 9 shown, the present application discloses an embodiment of a GOB packaging structure based on a display screen, comprising a lamp panel 1 and a light-transmitting layer 2, the light-transmitting layer 2 covers the lamp panel 1, the lamp panel 1 comprises a substrate 11 and a light-emitting unit 12, the light-emitting unit 12 is arranged on the substrate 11, the light-transmitting layer 2 is provided with a contrast hole 21, the contrast hole 21 is located between adjacent light-emitting units 12, and the two surfaces of the light-transmitting layer 2 opposite to the lamp panel 1 are axially penetrated by the contrast hole 21.
[0030] The embodiment sets the contrast hole 21 between the adjacent light-emitting units 12 on the light-transmitting layer 2, the contrast hole 21 is staggered with the light-emitting unit 12, does not affect the packaging protection and refraction of the light-emitting unit 12, and when the ambient light is incident on the surface of the display screen, due to the fact that the contrast hole 21 axially penetrates the two surfaces of the light-transmitting layer 2 opposite to the lamp panel 1, the depth of the contrast hole 21 causes the part of the light incident into the contrast hole 21 to be continuously reflected and absorbed in the contrast hole 21, thereby reducing the light emitted from the area where the contrast hole 21 is located, so that the area of the light-transmitting layer 2 opposite to the light-emitting unit 12 forms a brightness difference with the contrast hole 21; at the same time, since the contrast hole 21 directly penetrates the surface of the substrate 11, and the ambient light incident on the surface of the display screen is generally projected from the oblique upper side or the oblique side, the upper part or one side of the contrast hole 21 forms a shadow, this part of the shadow increases the brightness difference between the light-emitting units 12 adjacent thereto, therefore, when the density of the contrast hole 21 is large, the contrast of the display surface can be greatly increased.
[0031] Specifically, the light rays a irradiated onto the surface of the light-transmitting layer 2 away from the lamp panel 1 will be reflected by the light-transmitting layer 2; the light rays b irradiated onto the surface of the substrate 11 within the contrast hole 21 will be reflected by the surface of the substrate 11; the light rays c irradiated onto the surface of the substrate 11 within the contrast hole 21 will be blocked by the wall of the contrast hole 21 during the reflection, and continue to be reflected and absorbed, reducing the reflection of light rays; and a part of the light rays will be irradiated onto the wall of the contrast hole 21 and continue to be reflected and absorbed within the contrast hole 21.
[0032] The contrast hole 21 of the embodiment is arranged to pass through the surface of the substrate 11, and to reduce the refraction of the light rays irradiated onto the surface of the substrate 11 through the contrast hole 21, the surface of the area of the substrate 11 opposite to the contrast hole 21 is preferably arranged to be black, which can reduce the reflection of the light rays b and help to improve the display contrast. The substrate 11 is connected with the circuit board 3, and the circuit board 3 supplies power and controls the light-emitting unit 12 on the substrate 11.
[0033] The light-transmitting layer 2 of the embodiment is a potting layer, which covers the top surface of the substrate 11 and the top surface and side surface of the light-emitting unit 12, thereby forming a wrapping protection for the top surface 11 and the light-emitting unit 12, and playing an effective protection role in waterproof, moisture-proof, dust-proof, anti-collision, anti-static and the like. The potting layer can be a transparent adhesive material to increase the light transmittance.
[0034] Preferably, the light-transmitting layer 2 of the embodiment is provided with a first light-absorbing layer 4, the first light-absorbing layer 4 partially covers the surface of the light-transmitting layer 2 away from the lamp panel 1, and the first light-absorbing layer 4 is arranged to be staggered with the light beam angle of the light-emitting unit 12. The light beam angle refers to the included angle between the main shaft with the strongest light intensity of the light-emitting unit 12 and the positions with 50% light intensity on both sides.
[0035] The light-emitting area within the light beam angle range of the light-emitting unit 12 is referred to as a light-emitting central area F in the embodiment, and the first light-absorbing layer 4 is arranged to be staggered with the light beam angle of the light-emitting unit 12 to avoid the light-emitting central area F of the light-emitting unit 12 and to avoid absorbing the light rays of the light-emitting central area F of the light-emitting unit 12, which affects the light brightness. At the same time, the light rays outside the light beam angle of the light-emitting unit 12 are absorbed by the first light-absorbing layer 4, which can avoid the light mixing and light straying between the adjacent light-emitting units 12 and help to further improve the display effect. When the light rays in the environment are irradiated onto the display screen, the light-absorbing material of the first light-absorbing layer 4 can absorb the light rays on its surface, greatly reducing the reflection of the ambient light on the surface of the display screen, i.e. reducing the reflection of the light rays a, which not only reduces the glare and dazzling feeling, but also helps to improve the contrast.
[0036] More preferably, the embodiment further comprises a second light-absorbing layer 5, which completely covers the hole wall of the contrast hole 21. Most of the light rays entering the contrast hole 21 will be absorbed by the second light-absorbing layer 5 of the hole wall of the contrast hole 21, greatly reducing the light rays exiting around the contrast hole 21, i.e., reducing the light rays c and the reflection of the light rays irradiating the hole wall of the contrast hole 21, increasing the brightness difference between the contrast hole 21 and the light-emitting unit 12 adjacent to the contrast hole 21, and helping to further improve the contrast of the display screen.
[0037] The embodiment further comprises a third light-absorbing layer 6, and the projection area of the contrast hole 21 on the surface of the substrate 11 is completely covered by the third light-absorbing layer 6, so as to reduce the reflection of the light rays in the contrast hole 21, i.e., reduce the reflection of the light rays b and c, increase the light-dark difference inside and outside the contrast hole 21, and further enhance the contrast of the display screen.
[0038] In the embodiment, the first light-absorbing layer 4, the second light-absorbing layer 5, and the third light-absorbing layer 6 are all light-absorbing material coating of deep color and are opaque. The thickness of the first light-absorbing layer 4, the second light-absorbing layer 5, and the third light-absorbing layer 6 is 20-50 μm. Different thicknesses of the first light-absorbing layer 4, the second light-absorbing layer 5, and the third light-absorbing layer 6 basically do not affect the light transmittance, and the appropriate thickness of the coating can be selected according to the light-absorbing effect of the coating.
[0039] The refractive index of the light-transmitting layer 2 in the embodiment is 1.45-1.53. When the light-transmitting layer 2 diffuses the light rays emitted by the light-emitting unit 12, the thickness of the light-transmitting layer 2 needs to ensure a certain diffusion distance to improve the uniformity of display brightness and to make the depth of the contrast hole sufficient to achieve the expected contrast effect and improve the contrast. At the same time, the thickness of the light-transmitting layer 2 affects the maximum viewing angle of the display screen, and a too large thickness can easily cause the light emitted by the light-emitting unit to enter the contrast hole, reducing the display brightness. In combination with the above, Figure 8 In the embodiment, the thickness H of the light-transmitting layer 2 satisfies the following relationship: H≤(P-W / 2) / tan(α / 2), where P is the distance from the center of the light-emitting unit 12 to the center of the contrast hole 21, W is the diameter of the contrast hole 21, and α is the maximum viewing angle of the display screen. For the display screen, the maximum angle at which a user can clearly observe all the contents on the screen from different directions is the maximum viewing angle α of the display screen. In the embodiment, the maximum viewing angle α of the display screen ranges from 80° to 140°, and the display screen can achieve a relatively wide maximum viewing angle, and the display effect is good.
[0040] The light-emitting unit 12 in the embodiment is a lamp bead, and the beam angle thereof is preferably set to 110-120°. If the beam angle of the light-emitting unit 12 is set to be too large, part of the light emitted by the light-emitting unit 12 can enter the contrast hole 21 and be absorbed by the second light-absorbing layer 5 or the third light-absorbing layer 6, and the maximum visual angle of the display screen is affected. If the beam angle of the light-emitting unit 12 is set to be too small, the brightness uniformity is poor, and the display quality is affected.
[0041] The distance between the contrast hole 21 and the adjacent light-emitting unit 12 is equal, so that the display brightness is uniform. In the embodiment, the light-emitting unit 12 is arranged in a first array, the contrast hole 21 is arranged in a second array, and the contrast hole 21 is arranged at the center of the four adjacent light-emitting units 12, so that the display contrast of the display screen is uniform.
[0042] The light-emitting unit 12 and the contrast hole 21 in the embodiment are arranged in a rectangular array, that is, the contrast hole 21 is arranged at the diagonal position of the light-emitting unit 12. In addition, the contrast hole 21 can also be arranged in a circular array according to actual needs. The position of the contrast hole 21 and the light-emitting unit 12 does not affect normal display, but makes the display content clearer.
[0043] The contrast hole 21 can be arranged in a straight cylinder shape. In order to facilitate demolding, the contrast hole 21 can also have an inclination of 0-3°. In addition, the contrast hole 21 can also be arranged in a structure in which the cross section gradually decreases from the surface of the substrate 11 to the end away from the surface of the substrate 11, so as to reduce the light entering the contrast hole 21 and obtain a better contrast effect. The cross-sectional shape of the contrast hole 21 in the embodiment can be a circular shape, an elliptical shape, a polygonal shape, etc.
[0044] Compared with the prior art in which the surface of the module is treated as a matte surface to improve the color contrast of the product, under the sunlight outdoors, the light and the display module form a certain angle. Since the GOB packaging structure of the display screen makes the surface of the display module not a complete plane, the light entering the contrast hole 21 produces a shadow, the light is also reflected in the pit and is absorbed by the second light-absorbing layer 5 and the third light-absorbing layer 6. Due to the high density of the contrast hole 21, the contrast of the module surface can be increased in a large area. When the light enters the first light-absorbing layer 4, it is also absorbed by the light-absorbing material, and the reflection is greatly reduced.
[0045] The above only discloses a preferred embodiment of the utility model, and of course cannot limit the scope of the utility model. Therefore, equivalent changes made according to the claims of the utility model still fall within the scope of the utility model.
Claims
1. A display screen based GOB packaging structure, characterized in that, The display screen comprises a lamp plate and a light-transmitting layer, the light-transmitting layer covers the lamp plate, the lamp plate comprises a substrate and a light-emitting unit, the light-emitting unit is arranged on the substrate, the light-transmitting layer is provided with a contrast hole, the contrast hole is located between adjacent light-emitting units, and two surfaces of the light-transmitting layer opposite to the lamp plate are axially penetrated by the contrast hole.
2. The display screen based GOB packaging structure of claim 1, wherein, The display screen further comprises a first light-absorbing layer, the first light-absorbing layer partially covers a surface of the light-transmitting layer away from the lamp plate, and the first light-absorbing layer is arranged to be staggered with a beam angle of the light-emitting unit.
3. The display screen based GOB packaging structure according to claim 1 or 2, wherein, The display screen further comprises a second light-absorbing layer, the second light-absorbing layer covers a hole wall of the contrast hole.
4. The display screen based GOB packaging structure of claim 1, wherein, The display screen further comprises a third light-absorbing layer, a projection area of the contrast hole on the surface of the substrate is covered by the third light-absorbing layer.
5. The display screen based GOB packaging structure of claim 2, wherein, A distance from a center of the light-emitting unit to a center of the contrast hole is P, a maximum visual angle of the display screen is α, a diameter of the contrast hole is W, and a thickness H of the light-transmitting layer is less than or equal to (P-W / 2) / tan(α / 2).
6. The display screen based GOB packaging structure of claim 5, wherein, The maximum visual angle α of the display screen is 80-140°. The beam angle of the light-emitting unit is 110-120°.
7. The display screen based GOB packaging structure of claim 2, wherein, The thickness of the first light-absorbing layer is 20-50 μm.
8. The display screen based GOB packaging structure of claim 1, wherein, The refractive index of the light-transmitting layer is 1.45-1.
53.
9. The display screen based GOB packaging structure of claim 1, wherein, The light-emitting unit is arranged in a first array, the contrast hole is arranged in a second array, and the contrast hole is arranged at centers of four adjacent light-emitting units.
10. The display screen based GOB packaging structure of claim 1, wherein, The display screen further comprises a circuit board, and the substrate is connected to the circuit board.