CN215117072U - Display device - Google Patents
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- CN215117072U CN215117072U CN202120743607.4U CN202120743607U CN215117072U CN 215117072 U CN215117072 U CN 215117072U CN 202120743607 U CN202120743607 U CN 202120743607U CN 215117072 U CN215117072 U CN 215117072U
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Abstract
The utility model relates to a display device, including backlight unit, with set gradually in display panel, touch panel and the apron of backlight unit's light-emitting side, display panel with be provided with shading structure between the touch panel, shading structure is located the edge of display panel's light-emitting side, just shading structure is being on a parallel with display panel's ascending width in direction is greater than or equal to the default, makes the light of backlight unit outgoing passes through the outward flange of display panel's black matrix the total reflection takes place for the play plain noodles of apron behind the inward flange of shading structure.
Description
Technical Field
The utility model relates to a show product preparation technical field, especially relate to a display device.
Background
The vehicle-mounted module is used for ensuring the head-touch test and the touch function, the surface of the vehicle-mounted module is additionally provided with a cover plate and a sensor (touch panel), the uniformity of a TLCM dark state L0 picture is improved, the vehicle-mounted module tends to a panel suspension type design structure, the technical specification of a narrow frame is higher and higher, the suspension type module is arranged on an L0 picture of a narrow frame product, the problem of light leakage caused by reflection of the panel side edge is often encountered, specifically, light emitted by backlight is emitted when the panel glass side edge is approached, reflected light passes through the BM outer edge of a display panel and the ink inner edge of CG (cover plate), and is ejected from the cover plate, and when the visual angle is larger than the side edge light reflection limit angle, the light leakage of the panel side edge can be seen.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a display device solves the problem of panel side light leak.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions: a display device comprises a backlight module, a display panel, a touch panel and a cover plate, wherein the display panel, the touch panel and the cover plate are sequentially arranged on the light emitting side of the backlight module.
Optionally, the display panel includes a polarizer disposed on a light exit side thereof, and the light shielding structure is disposed at an edge of the polarizer.
Optionally, a width of the light shielding structure in a direction parallel to the display panel is greater than or equal to 0.76 mm.
Optionally, an optical adhesive is disposed between the touch panel and the polarizer, the light shielding structure is disposed around the optical adhesive, and the thickness of the light shielding structure in the direction perpendicular to the display panel is the same as the thickness of the optical adhesive.
Optionally, the display panel includes a polarizer disposed on the light exit side thereof, and the light shielding structure is disposed around the periphery of the polarizer.
Optionally, a width of the light shielding structure in a direction parallel to the display panel is greater than or equal to 0.65 mm.
Optionally, an optical adhesive is disposed between the touch panel and the polarizer, and a thickness of the light shielding structure in a direction perpendicular to the display panel is equal to a sum of a thickness of the polarizer and a thickness of the optical adhesive.
Optionally, the light shielding structure is made of light shielding glue.
Optionally, the display panel includes an array substrate and a color film substrate that are arranged oppositely, and the black matrix is arranged on the color film substrate.
Optionally, the backlight module includes a backlight source and a glue frame that assembles the backlight source, the display panel and the touch panel together, a gap is formed between the glue frame and the display panel, and the touch panel and the glue frame are connected by a double-sided adhesive tape.
The utility model has the advantages that: the edge of the light-emitting side of the display panel is provided with the shading structure, so that light emitted by the backlight module passes through the outer edge of the black matrix of the display panel and the inner edge of the shading structure, and then the light-emitting surface of the cover plate is totally reflected, and light leakage is avoided under the state of a large visual angle.
Drawings
FIG. 1 is a schematic view of a related art suspension display device;
FIG. 2 is a schematic diagram illustrating a light path of a display panel according to the related art;
FIG. 3 is a schematic view of a display device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, in order to ensure the head touch test and touch function of the vehicle-mounted module, a cover plate 1 and a sensor (touch panel) 4 are added on the surface of the vehicle-mounted module, in order to improve the uniformity of the L0 picture in the dark state of the TLCM, the vehicle-mounted module tends to a suspension design structure of a panel 2, a gap is formed between the panel 2 and a backlight 3, the touch panel 4 is connected with the backlight 3 through a double-sided adhesive, so that the stress of the panel 2 can be reduced, and the uniformity of the L0 picture can be improved, and as the technical specification of the narrow frame is higher and higher, the suspension module often encounters the problem of light leakage due to reflection at the side of the panel in the L0 picture of the narrow-frame product, referring to fig. 2, the light emitted from the backlight 3 passes through the outer edge of a BM (black matrix) 21 of the panel 2 and the inner edge of an ink area 11 of a CG (cover plate) 1 and is emitted from the cover plate 1, the side reflection limit angle is alpha, and when the visual angle is larger than the side reflection limit angle alpha, light leakage at the side of the panel can be seen.
Referring to fig. 2, the edge of the display panel 2 and the black matrix 21 are spaced 0.2mm from the glass edge, the side of the display panel reflects light through the outer edge of the black matrix 21, and the edge of the ink region 11 is emitted, according to the law of refraction of light, Sin α/Sin β is 1.47 (the refractive index of the glass substrate in the display panel is set to be 1.52, the refractive index of OCR (optical clear adhesive) is set to be 1.41, and the compromise is 1.47), in order to ensure that the side reflected light of the display panel is not visible, the limit optical path should ensure that total reflection occurs, that is, when α is 90 °, β is 42.9 °, when the thickness of the touch panel is 0.7mm, the thickness of the OCR (optical adhesive) is 0.4mm (the thickness of the optical adhesive between the display panel 2 and the touch panel 4 is 0.4mm), the thickness of the OCR (optical adhesive) is 0.5mm (the thickness of the optical adhesive between the cover plate 1 and the touch panel 4 is 0.5mm), and the thickness of the upper polarizer 3 is 0.12mm, calculating the distance b from VA (non-display area) to panel edge to be 2.25 mm; the distance a from the glass AA (effective display area) to the cover plate VA is more than 0.5 mm; the alignment tolerance of the panel and the cover plate is considered to be 0.3 mm;
the Panel frame is not less than (AA-VA) + (VA-edge) + the lamination tolerance is 2.25+0.5+ 0.3-3.05 mm;
when the product size increases, resulting in the thickness increase of touch panel 4 and OCR (including the optical cement between display panel 2 and touch panel 4, and the optical cement between cover plate 1 and touch panel 4), the panel frame size will be bigger, resulting in that the module can't satisfy the narrow frame requirement.
In view of the above problems, this embodiment provides a display device, which includes a backlight module 3, and a display panel 2, a touch panel 4 and a cover plate 1 that are sequentially disposed on a light exit side of the backlight module 3, and is characterized in that a light shielding structure 5 is disposed between the display panel 2 and the touch panel 4, the light shielding structure 5 is located on an edge of the light exit side of the display panel 2, and a width of the light shielding structure 5 in a direction parallel to the display panel 2 is greater than or equal to a preset value, so that light emitted from the backlight module 3 is totally reflected on a light exit surface of the cover plate 1 after passing through an outer edge of a black matrix 21 in a non-display area of the display panel 2 and an inner edge of the light shielding structure 5.
The light leakage does not occur if the limit light path is invisible, the light shielding structure 5 is arranged to enable the limit light path to be determined by the outer edge of the black matrix 21 of the display panel 2 and the inner edge of the light shielding structure 5, and is not related to the ink area 11 of the non-display area on the cover plate 1, that is, the arrangement of the light shielding structure 5 enables the limit light path to be unrelated to the thicknesses of the touch panel 4 and the optical cement, the light shielding structure 5 enables the light emitted by the backlight module 3 to pass through the outer edge of the black matrix 21 of the display panel 2 and the inner edge of the light shielding structure 5, and then the total reflection occurs on the light emitting surface of the cover plate 1, so that the side edge of the display panel 2 is ensured not to have the light leakage, and even if the thicknesses of the touch panel 4 and the optical cement are increased, the width of the frame of the display device is not affected, and the narrow frame is favorably realized.
It should be noted that the display panel includes a display area and a non-display area located at the periphery of the display area, the display panel includes an RGB color resistance layer and a black matrix layer, the black matrix layer includes a first black matrix located in the display area and a second black matrix located in the non-display area, in the display area, the first black matrix is provided with a plurality of openings, the RGB color resistance layer is located at the openings, in the non-display area, an inner edge of the second black matrix is disposed adjacent to the first black matrix, and a distance between an outer edge of the second black matrix and an outer edge of the display panel is 0.2mm (refer to distance d in fig. 3).
The specific structure of the light shielding structure 5 can be various, and several structures in the present embodiment are described below.
The first structural form is as follows: referring to fig. 3, in the present embodiment, the display panel 2 includes a polarizer 3 disposed on a light emitting side thereof, and the light shielding structure 5 is disposed at an edge of the polarizer 3.
In a conventional design, the thickness of the touch panel 4 is 0.7mm, the thickness of the optical adhesive between the display panel 2 and the touch panel 4 is 0.4mm, the thickness of the optical adhesive between the touch panel 4 and the cover plate 1 is 0.5mm, the thickness of the polarizer 3 is 0.12mm, the distance d between the black matrix 21 and the edge of the display panel is 0.2mm, the light emitted from the backlight module 3 passes through the outer edge of the black matrix 21 and the inner edge of the light shielding structure 5 and then exits from the cover plate 1, Sin α/Sin β is 1.47 (setting the refractive index of the glass substrate in the display panel to be 1.52, the refractive index of the OCR (optical cement) to be 1.41, and the compromise to be 1.47), in order to ensure that the side reflected light of the display panel is invisible, the limit light path should ensure that total reflection occurs, i.e., α is 90 °, β is 42.9 °, which is exemplary in this embodiment, the width a of the light shielding structure 5 in the direction parallel to the display panel 2 is greater than or equal to 0.76mm (i. 0.76mm), wherein beta is greater than or equal to 42.9 degrees, light which passes through the outer edge of the black matrix 21 of the display panel 2 and the inner edge of the light shielding structure 5 and is emitted from the cover plate 1 is totally reflected, no visible light is emitted, and light leakage is avoided.
The width of the light shielding structure 5 in a direction parallel to the display panel 2 may be rounded, that is, a is greater than or equal to 0.8mm, and in a direction parallel to the display panel 2, when a distance b from an effective display area AA of the display panel 2 to an inner edge of the ink area 11 on the cover plate 1 is greater than or equal to 0.5mm, and a distance c from the inner edge of the light shielding structure 5 to the inner edge of the ink area 11 on the cover plate 1 is greater than or equal to 0.7mm, a width of a frame of the display device is greater than or equal to 0.5+0.7+0.8 which is 2mm, and when the thicknesses of the touch panel 4 and the optical adhesive (including the optical adhesive between the display panel 2 and the touch panel 4 and the optical adhesive between the touch panel 4 and the cover plate 1) increase, the width of the frame is not affected, that is, that the thickness of the frame is the narrowest may also reach 2 mm.
In this embodiment, for example, optical cement is disposed between the touch panel 4 and the polarizer 3, the light shielding structure 5 is disposed around the optical cement, and the thickness of the light shielding structure 5 in the direction perpendicular to the display panel 2 is the same as the thickness of the optical cement.
The thickness of the light shielding structure 5 in the direction perpendicular to the display panel 2 is the same as the thickness of the optical cement, so that one surface of the light shielding structure 5 facing the touch panel 4 and one surface of the optical cement facing the touch panel 4 are located on the same plane.
The second structure form is as follows: referring to fig. 4, in this embodiment, the display panel 2 includes a polarizer 3 disposed on a light emitting side thereof, and the light shielding structure 5 is disposed around a periphery of the polarizer 3.
The polarizer 3 is retracted, the light shielding structure 5 is further close to the display panel 2, in a conventional design, the thickness of the touch panel 4 is 0.7mm, the thickness of the optical cement between the display panel 2 and the touch panel 4 is 0.4mm, the thickness of the optical cement between the touch panel 4 and the cover plate 1 is 0.5mm, the thickness of the polarizer 3 is 0.12mm, the distance d between the black matrix 21 and the edge of the display panel is 0.2mm, light emitted from the backlight module 3 passes through the outer edge of the black matrix 21 and the inner edge of the light shielding structure 5 and then exits from the cover plate 1, according to the optical refraction law, Sin α/Sin β 1.47 (setting the refractive index of the glass substrate in the display panel to be 1.52, the refractive index of OCR (optical cement) to be 1.41, and taking 1.47 as a compromise), in order to ensure that the side reflected light of the display panel is invisible, a limit light path should ensure that total reflection occurs, that is, α is 90 °, when β is 42.9 °, in this embodiment, for example, a width a of the light-shielding structure 5 in a direction parallel to the display panel 2 is greater than or equal to 0.65mm (that is, the preset value is 0.65mm), when β is greater than or equal to 42.9 °, light passing through an outer edge of the black matrix 21 of the display panel 2 and an inner edge of the light-shielding structure 5 and exiting from the cover plate 1 is totally reflected, and no visible light exits, thereby avoiding light leakage.
The width of the light shielding structure 5 in a direction parallel to the display panel 2 may be rounded, that is, a is greater than or equal to 0.7mm, and in a direction parallel to the display panel 2, when a distance b from the effective display area AA of the display panel 2 to the inner edge of the ink area 11 on the cover plate 1 is greater than or equal to 0.5mm, and a distance c from the inner edge of the light shielding structure 5 to the inner edge of the ink area 11 on the cover plate 1 is greater than or equal to 0.7mm, a width of a frame of the display device is greater than or equal to 0.5+0.7+0.7 mm and 1.9mm, and when the thicknesses of the touch panel 4 and the optical adhesive (including the optical adhesive between the display panel 2 and the touch panel 4 and the optical adhesive between the touch panel 4 and the cover plate 1) increase, the width of the frame is not affected, that is, the thickness of the frame may be the narrowest and may also reach 1.9 mm.
In this embodiment, for example, an optical adhesive is disposed between the touch panel 4 and the polarizer 3, and the thickness of the light shielding structure 5 in the direction perpendicular to the display panel 2 is equal to the sum of the thickness of the polarizer 3 and the thickness of the optical adhesive.
The shading structure 5 with the above two structural forms has the function of eliminating light leakage at the shielding side edge, and can ensure the picture quality of a suspended narrow-frame product.
In this embodiment, the light shielding structure 5 is made of light shielding glue. Can choose for use ELASTOSIL RT724 or other glues of the same type, guarantee can the shading, have certain mobility, can adopt the mode of coating to form like this shading structure 5 if when the equipment, because the extrusion makes shading is glued and is taken place the circumstances such as deformation overflow and glue, can get rid of overflow and glue the part, guarantees the homogeneity of picture.
In this embodiment, the display panel 2 includes an array substrate and a color filter substrate that are oppositely disposed, and the black matrix 21 is disposed on the color filter substrate.
In this embodiment, the backlight module 3 includes a backlight source and a glue frame that assembles the backlight source, the display panel 2 and the touch panel 4 together, a gap is formed between the glue frame and the display panel 2, and the touch panel 4 and the glue frame are connected by a double-sided tape.
The display device may be: the display device comprises any product or component with a display function, such as a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet personal computer and the like, wherein the display device further comprises a flexible circuit board, a printed circuit board and a back plate.
The above is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should be considered as the protection scope of the present invention.
Claims (10)
1. A display device comprises a backlight module, a display panel, a touch panel and a cover plate, wherein the display panel, the touch panel and the cover plate are sequentially arranged on the light emitting side of the backlight module.
2. The display device according to claim 1, wherein the display panel comprises a polarizer disposed at a light emitting side thereof, and the light shielding structure is disposed at an edge of the polarizer.
3. A display device according to claim 2, wherein the width of the light shielding structure in a direction parallel to the display panel is greater than or equal to 0.76 mm.
4. The display device according to claim 2, wherein an optical adhesive is disposed between the touch panel and the polarizer, the light shielding structure surrounds the optical adhesive, and a thickness of the light shielding structure in a direction perpendicular to the display panel is the same as a thickness of the optical adhesive.
5. The display device according to claim 1, wherein the display panel comprises a polarizer disposed at a light emitting side thereof, and the light shielding structure is disposed around a periphery of the polarizer.
6. A display device according to claim 5, wherein the width of the light shielding structure in a direction parallel to the display panel is greater than or equal to 0.65 mm.
7. The display device according to claim 5, wherein an optical adhesive is disposed between the touch panel and the polarizer, and a thickness of the light shielding structure in a direction perpendicular to the display panel is equal to a sum of a thickness of the polarizer and a thickness of the optical adhesive.
8. The display device according to claim 1, wherein the light shielding structure is a light shielding adhesive.
9. The display device according to claim 1, wherein the display panel comprises an array substrate and a color filter substrate which are arranged oppositely, and the black matrix is arranged on the color filter substrate.
10. The display device according to claim 1, wherein the backlight module comprises a backlight source and a glue frame for assembling the backlight source, the display panel and the touch panel together, a gap is formed between the glue frame and the display panel, and the touch panel and the glue frame are connected by a double-sided adhesive tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120743607.4U CN215117072U (en) | 2021-04-12 | 2021-04-12 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120743607.4U CN215117072U (en) | 2021-04-12 | 2021-04-12 | Display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215117072U true CN215117072U (en) | 2021-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120743607.4U Active CN215117072U (en) | 2021-04-12 | 2021-04-12 | Display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215117072U (en) |
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2021
- 2021-04-12 CN CN202120743607.4U patent/CN215117072U/en active Active
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