Monolithic light guide for display screen and display screen having same

Abstract

The utility model discloses an integral light guide for a display screen and the display screen with the integral light guide. Wherein the integral light guide comprises a light guide body, and the light guide body is provided with a first main surface for emitting light, a second main surface opposite to the first main surface in the height direction, and a side edge surface for light entering; the light guide main body comprises a total reflection section and a microstructure section; in the first horizontal direction, the total reflection section abuts against the side edge surface, and the microstructure section is located on the side, away from the side edge surface, of the total reflection section. The microstructure segment is provided with a character area used for coupling and outputting light incident through the side edge surface from the microstructure segment, and the character area is formed on the first main surface or the second main surface through microstructure primitive combination. The character area is arranged to be of an inwards-concave structure or an outwards-convex structure in the height direction. According to the utility model, the character area has high hiding performance and cannot be identified when the light source is turned off.

Description

Technical Field

[0001] The utility model relates to the field of display screens, in particular to an integral light guide for a display screen and a display screen having the integral light guide. Background Art

[0002] Light sources can be roughly divided into direct light sources and indirect light sources. Light sources that directly emit light from light bulbs, lamp tubes, and other luminous bodies can be considered direct light sources. Light that is presented after the light of direct light sources passes through conductive components can be considered indirect light sources.

[0003] Among them, the conducting components of the indirect light source, such as the light guide structure, etc., together with the light source (LED light source), can be used as the light source module of products such as LCD TVs, display screens, billboards, etc. For some specific applications of the above products, such as display screens for vehicles, the existing technical solutions usually realize display by selectively coupling out the light coupled from the light source to the end face of the light conductor through the surface structure on the main surface used as the display surface; generally, this method only partially provides an area with the surface structure to reproduce the symbol.

[0004] However, in the prior art such as the above, although the light source is turned off, the symbol can be visible in an environment with incident light (such as when sunlight shines into the interior of the vehicle), which may cause observers, especially vehicle drivers, to make undesirable situations such as misjudging the actual switch state. Utility Model Content

[0005] In order to at least partially solve the deficiencies in the prior art, the main purpose of the utility model is to provide an integral light guide for a display screen and a display screen having the integral light guide, wherein when the light source is turned off, the character area is highly hidden and cannot be recognized or is basically not obvious.

[0006] In order to achieve the above main purpose, the utility model discloses, in a first aspect, an integral light guide for a display screen, comprising a light guide body, the light guide body having a first main surface for emitting light, a second main surface opposite to the first main surface in a height direction, and a side edge surface for letting in light;

[0007] The light guide body comprises a total reflection segment and a microstructure segment; wherein, in a first horizontal direction, the total reflection segment is close to the side edge surface, and the microstructure segment is located on a side of the total reflection segment away from the side edge surface;

[0008] A character area is provided on the microstructure segment for coupling out light incident through the side edge surface from the microstructure segment. The character area is formed on the first main surface or the second main surface by combining microstructure elements.

[0009] According to a specific implementation of the present utility model, the character area is configured as an inner concave structure or an outer convex structure in the height direction.

[0010] According to a specific implementation of the present utility model, the thickness of the light guide body in the height direction is set to 0.2 mm to 20 mm, and the maximum height / depth of the character area is set to 120 μm.

[0011] According to a specific implementation of the present invention, the outer contour of the projection of the microstructure element on the horizontal plane is circular, elliptical, square or rectangular.

[0012] Furthermore, the microstructure element is a hollow ring structure.

[0013] According to a specific implementation of the present invention, the cross-sectional shape of the microstructure element in the cross section in the height direction is trapezoidal, triangular, drum-shaped or hemispherical.

[0014] According to a specific implementation of the present invention, the maximum size of the microstructure element in the horizontal plane is 150 μm, and the spacing between adjacent microstructure elements in the character area in the first horizontal direction and the second horizontal direction orthogonal to the first horizontal direction is 50-150 μm.

[0015] A second aspect of the present invention provides a display screen comprising a non-emissive display panel and an integral light guide as described above; wherein the non-emissive display panel is located on the front side of the first major surface in the height direction.

[0016] The utility model has the following beneficial effects: provides an integral light guide for a display screen and a display screen having the integral light guide, wherein the light guide body of the integral light guide includes a total reflection section and a microstructure section, and the microstructure section is provided with a character area for coupling out light incident through a side edge surface from the microstructure section; wherein the character area is formed by combining microstructure graphic elements, can have more design forms and directions, and has strong practicality. In the utility model, when the light source is turned off, the character area has high concealment and will not be recognized or is basically not obvious.

[0017] At the same time, the utility model also has the advantages of low manufacturing cost and high light utilization rate.

[0018] In order to more clearly illustrate the purpose, technical solutions and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the integral light guide of the utility model;

[0020] Figure 2 It is a front view of the integral light guide of the utility model;

[0021] Figure 3is a schematic cross-sectional view of the integral light guide of the utility model;

[0022] Figure 4 is an enlarged view of the side edge surface;

[0023] Figure 5 is a diagrammatic representation of a character area and an enlarged view of a schematic microstructural element;

[0024] Figure 6 It is a schematic diagram of the projected outer contour of the microstructure element on the horizontal plane;

[0025] Figure 7 It is a schematic diagram of the cross section where the microstructure element is located in the height direction. DETAILED DESCRIPTION

[0026] In the following description, many specific details are explained in combination with embodiments to facilitate a full understanding of the present invention. However, it should be understood that the following embodiments and detailed descriptions are only for illustrative purposes and do not limit the scope of protection of the present invention.

[0027] The integrated light guide for the display screen of the present utility model embodiment comprises a light guide body 10, such as Figure 1-3 As shown, the light guide body 10 has a first main surface 10a for emitting light, a second main surface 10b opposite to the first main surface 10a in the height direction, and a side edge surface 10c for letting in light; wherein the first main surface 10a and the second main surface 10b are both planar structures. Exemplarily, the thickness of the light guide body in the height direction is set to 0.2 mm to 20 mm.

[0028] Furthermore, at least one light inlet 11 is provided at the side edge surface 10c. Figure 4 As shown, the light-inlet portion 11 is specifically a protrusion protruding outward in the first horizontal direction X; a groove 11a is provided on the light-inlet portion 11, and the groove 11a is used to adapt to a light-emitting body such as an LED light source to provide a receiving space for the light-emitting body. Preferably, a plurality of staggered light-inlet planes are formed in the groove 11a, so that the light beam emitted by the light-emitting body enters the interior of the light guide body 10 more evenly through the side edge surface 10c.

[0029] The plurality of light-incoming planes are respectively a first light-incoming plane 111, a second light-incoming plane 112, a third light-incoming plane 113 and a fourth light-incoming plane 114. The first light-incoming plane 111, the second light-incoming plane 112, the third light-incoming plane 113 and the fourth light-incoming plane 114 are transitionally connected to form a W shape. Figure 3The angle formed between the first light incident surface 111 and the second light incident surface 112 is A1, the angle formed between the second light incident surface 112 and the third light incident surface 113 is A2, and the angle formed between the third light incident surface 113 and the fourth light incident surface 114 is A3; wherein, the angle A2 is preferably set to be greater than the angle A1 and the angle A3, that is, the angle A2 is larger, preferably an obtuse angle, and an example is 95°-120°; the angle A1 and the angle A3 are smaller, preferably an acute angle, and an example is 45°-60°; preferably, the angle A1 and the angle A3 are the same in size.

[0030] The first light incident surface 111 and the fourth light incident surface 114 are preferably inclined relative to the first horizontal direction X, and the inclination angle range is 5°-20°.

[0031] like Figure 3 As shown, the light guide body 10 includes a total reflection section 12 and a microstructure section 13; in the first horizontal direction X, the total reflection section 12 is close to the side edge surface 10c, and the microstructure section 13 is located on the side of the total reflection section 12 away from the side edge surface 10c; wherein the microstructure section 13 is provided with a character area 14 for coupling out the light incident through the side edge surface 10c from the microstructure section 13, and the character area 14 is formed on the first main surface 10a or the second main surface 10b by combining microstructure elements 14a. wherein, in the second horizontal direction Y, the number of the character areas 14 can be multiple, for example Figure 1-2 Four different types of character areas 14 are shown, and each character area 14 corresponds to a light entrance portion 11 .

[0032] Furthermore, the character region 14 is configured as an inner concave structure or an outer convex structure in the height direction, wherein a specific form of the combination of several microstructure elements 14a in the character region 14 is an array combination, such as Figure 5 As shown; illustratively, the maximum size of the microstructure element 14a in the horizontal plane is 150μm, and the spacing between adjacent microstructure elements 14a in the character area 14 in the first horizontal direction X and the second horizontal direction Y orthogonal to the first horizontal direction X is 50-150μm.

[0033] like Figure 6As shown, the outer contour of the projection of the microstructure element 14a in the horizontal plane in the embodiment is a circle, an ellipse, a square or a rectangle. When in use, the specific shape of the microstructure element 14a can be selectively set according to needs. For example, when there is no special requirement for the display direction, a circle / square can be selected, and when the brightness requirement in a certain direction is high, an ellipse / rectangle can be selected. In some embodiments, the microstructure element 14a can also be a hollow ring structure; wherein, compared with a solid structure, the hollow ring structure has better concealment; compared with a hollow ring structure, the solid structure has higher brightness; when in use, the specific structure of the microstructure element 14a can be selectively set according to specific needs.

[0034] The maximum height / depth H of the character area 14 is set to 120 μm; wherein the cross-sectional shape of the microstructure element 14a in the cross section in the height direction is preferably a trapezoid or a triangle, as shown in FIG. Figure 7 Several specific examples are shown. In other embodiments, the cross-sectional shape of the microstructure element 14a in the cross section in the height direction may also be a drum shape or a hemispherical shape.

[0035] Please continue reading Figure 1-2 To facilitate the assembly of the light guide body 10, in the embodiment, four side edge regions of the light guide body 10 are provided with through holes 15 in the height direction. The shapes of the through holes 15 are preferably different, so that some of the through holes 15 can be used as pre-positioning, and other through holes can be passed through by fasteners such as bolts to achieve the installation of the light guide body 10 on, for example, a non-emissive display panel.

[0036] In the embodiment, the character area 14 formed by the combination of microstructure elements 14a can be highly hidden and cannot be recognized or is basically not obvious when the light source is turned off, which is conducive to enriching the usage scenarios and is more suitable for the needs of modern new display screens.

[0037] Although the present invention is described above through embodiments, the above embodiments are only used to exemplarily describe the feasible implementation methods of the present invention, and are not used to limit the protection scope of the present invention. Any equivalent substitutions or changes made by those skilled in the art in accordance with the present invention should also be covered by the protection scope defined by the claims of the present invention.

Claims

1. An integral light guide for a display screen, comprising a light guide body, wherein the light guide body has a first main surface for emitting light, a second main surface opposite to the first main surface in a height direction, and a side edge surface for receiving light; characterized in that: The light guide body comprises a total reflection segment and a microstructure segment; wherein, in a first horizontal direction, the total reflection segment is close to the side edge surface, and the microstructure segment is located on a side of the total reflection segment away from the side edge surface; The microstructure segment is provided with a character region for coupling out the light incident through the side edge surface from the microstructure segment. The character region is formed on the first main surface or the second main surface by combining microstructure elements.

2. The integral light guide for a display screen according to claim 1, characterized in that: The character area is configured as a concave structure or a convex structure in the height direction.

3. The integral light guide for a display screen according to claim 1, characterized in that: The thickness of the light guide body in the height direction is set to 0.2 mm to 20 mm, and the maximum height / depth of the character area is set to 120 μm.

4. The integral light guide for a display screen according to claim 1, characterized in that: The projected outer contour of the microstructure element on the horizontal plane is circular, elliptical, square or rectangular.

5. The integral light guide for a display screen according to claim 4, characterized in that: The microstructure element is a hollow ring structure.

6. The integral light guide for a display screen according to claim 1, characterized in that: The cross-sectional shape of the microstructure element in the cross section in the height direction is trapezoidal, triangular, drum-shaped or hemispherical.

7. The integral light guide for a display screen according to claim 1, characterized in that: The maximum size of the microstructure element in the horizontal plane is 150 μm, and the spacing between adjacent microstructure elements in the character area in the first horizontal direction and the second horizontal direction orthogonal to the first horizontal direction is 50-150 μm.

8. A display screen, characterized in that: The invention comprises a non-emissive display panel and an integral light guide according to any one of claims 1 to 7; wherein the non-emissive display panel is located at a front side of the first major surface in a height direction.

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