CN211478810U

CN211478810U - Large-size seamless splicing display system

Info

Publication number: CN211478810U
Application number: CN201921305876.1U
Authority: CN
Inventors: 杨冠男; 张婉璐
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-09-11
Anticipated expiration: 2029-08-13

Abstract

The utility model provides a large-size seamless splicing display system, which comprises a linear prism array, an optical transparent light guide plate, a liquid crystal panel, a diffusion element and a backlight source; the linear prism array is tightly attached to the optical transparent light guide plate without leaving air, the optical transparent light guide plate is tightly attached to the upper surface of the liquid crystal panel without leaving air, and the lower surface of the liquid crystal panel is tightly attached to the diffusion element without leaving air. After the linear prism array is matched with the optical transparent light guide plate and the diffusion element, the splicing seam between adjacent liquid crystal panels can be eliminated, so that an observer can view an integral picture without the splicing seam at each angle.

Description

Large-size seamless splicing display system

Technical Field

The utility model relates to an optical device and system design technical field especially relate to a seamless concatenation display system of jumbo size.

Background

In recent years, with the increasing demand of various activity scenes on super-large-size display, the super-large-size display is limited by the size limitation of each display unit, and the super-large-size display achieved by splicing various display units is applied to various aspects of life, such as outdoor advertisements, stadiums, command halls, exhibition halls, and control room application occasions such as power dispatching and subway dispatching. However, in the existing splicing screen, display units are mostly directly spliced as sub-units, and therefore, an area which cannot be displayed, namely a so-called seam, always appears in a splicing area between two adjacent sub-display units.

At present, the treatment of the edge joint at home and abroad generally comprises the following steps:

(1) adding LED lamp strip at display unit seam

The method has high cost, the lamp strips are easy to damage and high in maintenance cost, although the splicing seams are made up by the LED lamp strips, the splitting feeling of the whole picture is very serious due to the difference between the LED lamp strips and the liquid crystal panel, and the complete and uniform picture cannot be realized.

(2) Using the refractive action of lenses

The second method is to eliminate the splicing gap by bending a certain material (such as glass, acrylic, etc.) to achieve the lens refraction effect, and the method can realize small visual angle for viewing seamless content and even view enlarged splicing gap at a larger viewing angle. Moreover, the bending is easily affected by the ambient light, and the observer can easily see brighter ambient light through the bent glass part, thereby affecting the visual effect. Because the splicing part has a curved lens shape, an observer can have a more obvious curved surface, and the whole body is uneven. Such as patent document 1 (chinese patent publication No. CN207319612U), patent document 2 (chinese patent publication No. CN207302510U), patent document 3 (chinese patent publication No. CN206991664U), and patent document 4 (chinese patent publication No. CN 207165134U).

(3) Microprism array

The third method is to cover a prism array composed of a plurality of tiny prisms on the seam, and make the seam invisible to human eyes by the refraction principle of the prism array, but the method has the problems of small viewing angle, unnatural transition of images at the spliced part, and the like, such as patent document 5 (Chinese patent publication No. CN109377891A), patent document 6 (Chinese patent publication No. CN203376935U), and the like.

(4) Optical amplification plate and reflection surface

A fourth method is to provide an optical magnifying plate above the display screen, and provide a reflecting surface between the joint and the optical magnifying plate, as described in patent document 7 (chinese patent publication No. CN101770732B), and the reflecting surface completely covers the joint. When the human eyes watch the display screen, the effect of eliminating the abutted seams is achieved through the optical amplification plate and the reflecting surface. As shown in fig. 1.

However, the above solution still has problems:

(1) the optical magnifying plate of patent document 7 is attached to the display screen (as recited in claim 3 of patent document 7), so that the light emitted from the position of the human eye (i.e., the line of sight) is not totally reflected on the contact surface between the display screen and the optical magnifying plate. However, as shown in fig. 2(a) and 2(b), when the display screen is a liquid crystal display screen, since air exists between the liquid crystal display panel and the LED light source, when human eyes observe through the optical amplification plate at a certain angle, the line of sight is totally reflected on the back surface of the liquid crystal display panel, so that the back light source cannot be reached, and thus the human eyes cannot see the image on the display screen, thereby greatly reducing the effective viewing angle at which a complete large-screen picture can be seen.

(2) A part or all of a surface of the optical magnification plate in patent document 7 facing the display screen is a rough surface (as recited in claim 7 of patent document 7). Such an arrangement can present three problems: 1. since the rough surface is placed in front of the display screen, the sharpness of the displayed image is seriously reduced; 2. the rough surface may seriously reduce the brightness of the displayed image; 3. because the rough surface is placed in front of the display screen, the whole display screen can have a white and frosty visual effect in a power-off state, and the attractiveness of the display system is reduced.

SUMMERY OF THE UTILITY MODEL

To all kinds of problems of present jumbo size seamless display scheme, in order to realize a jumbo size seamless display system who has full visual angle, high definition, hi-lite, the utility model provides a seamless concatenation display scheme based on polylith liquid crystal display panel, linear prism array, optics transparent light guide plate, diffusion component. The linear prism array is tightly attached to the optical transparent light guide plate without leaving air, the optical transparent light guide plate is tightly attached to the upper surface of the liquid crystal panel without leaving air, and the lower surface of the liquid crystal panel is tightly attached to the diffusion element without leaving air

Further, the value range of the line width P of each small prism in the linear prism array is 0mm<P<1mm, theta is the base angle of the prism and the range is 0 DEG<θ<50 °, more preferred ranges are: 0 degree<θ<arcsin(1/n_Edge)°，n_EdgeIs the index of refraction of the linear prism array.

Further, the side surface of the optically transparent light guide plate may be a vertical surface, an inclined surface, a curved surface, or a combination of these surfaces. Wherein, the contained angle of optics transparent light guide plate side and liquid crystal panel plane satisfies: theta is not less than 45 degrees₀≦ 90 °, more preferred ranges are: arcsin (1/n)_{Light guiding})°≤θ₀Not more than 90 degrees, wherein n_{Light guiding}Is refraction of the optically transparent light guide plate.

Further, the prism tooth surface of the linear prism array is not directed to the liquid crystal panel side.

Furthermore, the optical transparent light guide plate is made of a glass material, an acrylic material or other transparent materials. The thickness H is in the range of 0mm < H <50 mm.

Further, in a critical region of the linear prism array, L1-1(L1-1 ═ L2+2 × H × tan [ arcsin (1/n)_Edge)]) The base angle theta of each prism and the included angle theta between the side surface of the optical transparent light guide plate and the plane of the liquid crystal panel₀Should satisfy: theta + theta₀≥arcsin(1/n_Edge)°+arcsin(1/n_{Guide tube}) L2 is the width of the joint, H is the thickness of the optical transparent light guide plate, n_EdgeIs the refractive index of the linear prism array, n_{Guide tube}Is the refractive index of the optically transparent light guide plate.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic diagram of a fourth seamless splicing scheme in the prior art.

Fig. 2(a) is a light path diagram of four problems of the seamless splicing scheme in the prior art.

Fig. 2(b) is a diagram of optical paths of four problems of the seamless splicing scheme in the prior art.

Fig. 3 is a schematic diagram of a display screen formed by splicing four displays with frames.

FIG. 4 is a schematic diagram of the overall structure of a large-sized seamless tiled display system unit module according to the present invention.

Fig. 5 is the light path schematic diagram of the large-size seamless tiled display system of the present invention.

Fig. 6(a) is a first schematic diagram of the optical path when the linear prism array is not closely attached to the optically transparent light guide plate.

Fig. 6(b) is a schematic diagram of the optical path when the linear prism array is not closely attached to the optically transparent light guide plate.

Fig. 7(a) is a first schematic diagram of optical paths when the optically transparent light guide plate is not closely attached to the liquid crystal panel.

Fig. 7(b) is a schematic diagram of the optical path when the optically transparent light guide plate is not closely attached to the liquid crystal panel.

FIG. 8(a) is a first schematic diagram of the optical path when the liquid crystal panel is not closely attached to the diffusing element.

FIG. 8(b) is a second schematic diagram of the optical path when the liquid crystal panel is not closely attached to the diffusing element.

Fig. 9 is a schematic diagram of the linear prism array 101.

Fig. 10 is a structural view of the linear prism array 101.

Fig. 11 is a schematic diagram of the side surface of the optically transparent light guide plate 102 being an inclined surface.

Fig. 12 is a schematic diagram of the optical transparent light guide plate 102 with a combination of vertical and curved sides.

Fig. 13 is a schematic diagram of the optical transparent light guide plate 102 with a combination of vertical and oblique sides.

Fig. 14 is a light path diagram of the optical transparent light guide plate 102 with an inclined side surface.

Fig. 15 is a light path diagram of the optical transparent light guide plate 102 with a combination of vertical and curved sides.

Fig. 16 is a light path diagram of the optical transparent light guide plate 102 with a combination of vertical and oblique sides.

Fig. 17 is a schematic diagram of a critical area of the linear prism array 101 when the side surface of the optically transparent light guide plate 102 is a slant surface.

Fig. 18 is a schematic diagram of a key area of the linear prism array 101 when the side surface of the optically transparent light guide plate 102 is a combination of a vertical surface and a curved surface.

Fig. 19 is a schematic diagram of a key area of the linear prism array 101 when the side surface of the optically transparent light guide plate 102 is a combination of a vertical surface and a slant surface.

Fig. 20 is a schematic view of the linear prism array 101 and the optically transparent light guide plate 102 being integrally processed.

Fig. 21 is a schematic view showing the linear prism array 101 and the optically transparent light guide plate 102 being integrally processed and then being closely attached to a liquid crystal.

Fig. 22 is a schematic view of the diffusion element diffusing light.

Detailed Description

To facilitate understanding and implementing the present invention for those skilled in the art, the following technical solutions of the present invention are described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 3, a display screen formed by splicing four displays with frames is taken as an example for explanation, where 103 represents a display area of a liquid crystal panel of the display, a shaded portion 106 represents a frame where the display cannot display content, and an area a in a middle dotted line frame is a portion where left and right frames of two displays are connected, i.e., a seam. When the display is spliced and the display content is played, the presence of the splicing area A of the display leads to picture segmentation, and the viewing experience is greatly influenced. Examples of displays used for tiling are liquid crystal displays (LCD displays), plasma displays (PDP displays), OLED displays, rear projection displays (DLP rear projection displays, LED rear projection displays, etc.

Fig. 4 is a schematic diagram of the overall structure of the system unit module according to the present invention, where 101 is a linear prism array, 102 is an optically transparent light guide plate, 103 is a liquid crystal panel, 104 is a diffusion element, and 105 is a backlight source. Wherein, the linear prism array 101 and the optical transparent light guide plate 102 are tightly attached, that is, air cannot exist during the attachment; the optical transparent light guide plate 102 and the liquid crystal panel 103 are also tightly attached, that is, air cannot exist during attachment; the liquid crystal panel 103 and the diffusion member 104 are also in close contact with each other, that is, air is not allowed to exist during contact.

Fig. 5 is a schematic diagram of the optical path of the system, and because of the reversibility of the optical path, the light (i.e. the sight line) from the position of human eyes is used to analyze the corresponding optical path for simplicity and convenience. When the observer looks at a position near the middle, for example, the light from position i will be refracted by the linear prism array 101 and incident on the pixel region 1, so that the human eye will observe the image in the pixel region 1 instead of the patchwork. Similarly, when the observer views at the position ii or iii, the light emitted from the human eye is refracted by the linear prism array 101 and then enters the pixel region 2 or 3, so that the human eye observes the image in the pixel region 2 or 3 instead of the seam. Thus, seamless splicing viewing under various viewing angles is realized.

[ advantages of the proposed solution-solution of the Total reflection problem ]

The traditional scheme of eliminating the splicing seams by utilizing the microprism array is influenced by total reflection on the contact surface of each optical element, so that the effective viewing angle is limited to a great extent. That is, when the observer views the content at the spliced position deviating from a certain angle, the observer cannot view the picture on the display through the microprism array due to the influence of total reflection, thereby reducing the effective viewing angle at which the complete large-screen picture can be viewed. In order to solve the problem, the utility model provides a: the linear prism array 101 and the optical transparent light guide plate 102 are tightly attached, that is, air cannot exist during attachment; the optical transparent light guide plate 102 and the liquid crystal panel 103 are also tightly attached, that is, air cannot exist during attachment; the liquid crystal panel 103 and the diffusion member 104 are also in close contact with each other, that is, air is not allowed to exist during contact.

If the linear prism array 101 and the optically transparent light guide plate 102 are not closely attached or air still exists after the close attachment, as shown in fig. 6(a) and 6(b), light rays (i.e., sight lines) from the positions of human eyes are totally reflected on the lower bottom surface of the linear prism array 101, and an observer cannot view a picture on the liquid crystal panel through the micro-prism array due to the influence of the total reflection, so that the effective viewing angle at which the observer can view a complete large-screen picture is reduced. If the optically transparent light guide plate 102 is not closely attached to the liquid crystal panel 103 or air still exists after the optically transparent light guide plate is closely attached, as shown in fig. 7(a) and 7(b), light rays from the positions of human eyes are totally reflected on the lower bottom surface of the optically transparent light guide plate, and at this time, an observer cannot view a picture on the liquid crystal panel through the microprism array because the sight cannot reach the liquid crystal panel, so that the effective viewing angle for viewing a complete large-screen picture is reduced; if the liquid crystal panel 103 is not closely attached to the diffusion element 104 or air still exists after the liquid crystal panel is closely attached to the diffusion element, as shown in fig. 8(a) and 8(b), light rays from the positions of human eyes are totally reflected on the lower bottom surface of the liquid crystal panel, so that the sight lines pass through the liquid crystal panel but do not reach the backlight source, and thus, the human eyes still cannot view the picture on the liquid crystal panel through the micro-prism array, thereby reducing the effective viewing angle at which a complete large-screen picture can be viewed.

It should be noted that, the above-mentioned system unit module overall structure comprises two liquid crystal display panels, and this is only an embodiment, utilizes the utility model discloses in the optical element carries out polylith liquid crystal display panel concatenation and realizes the effect that seamless was watched, all be within the scope of protection of the utility model. The specific functions of the respective optical elements will be described in detail below.

[ Linear prism array 101]

As shown in fig. 9, the linear prism array 101 is an optical plate or film made of a transparent material, and is composed of a plurality of prism units. The prism array has two main functions: firstly, refraction modulation is carried out on light rays at the seam position at a certain angle, and the effect of eliminating the seam visually is achieved; and secondly, the images displayed by the spliced display system are smoother. The prism array structure will be described in detail below.

As shown in FIG. 10, L1 is the aperture of the prism array, and the value range is limited to L1 ≧ L2, and L2 is the width of the splice seam. The line width of each small prism in the prism array is P, and the value range is 0mm<P<1 mm. Theta is the base angle of the prism, wherein theta is limited to be 0 DEG<θ<50 °, more preferred ranges are: 0 degree<θ<arcsin(1/n_Edge)°，n_EdgeIs the index of refraction of the linear prism array.

It should be noted that the optical structure of the prism array described above is only one of the embodiments, and the prism array structure that can perform a certain angle deflection on the light at the seam is all within the protection scope of the present invention.

In the manufacturing process, the linear prism array 101 may be integrally formed by a UV curing molding process, and the material used is a UV glue, and the refractive index of the UV glue is not limited. In addition, the material can also be made by hot-press molding, and the material can be plastic resin material (such as PMMA, PC, COC, POLYCARB, etc.); or various glass materials (such as crown glass, flint glass, dense crown glass, dense flint glass or LA series glass); or by conventional cold working process, wherein the material can be plastic resin (such as PMMA, PC, COC, POLYCARB, etc.); or various glass materials (such as crown glass, flint glass, dense crown glass, dense flint glass or LA series glass); various optical films (such as antireflection films) can be plated on the surface to change the optical performance of the element.

[ optically transparent light-guiding plate 102]

The main functions of the optically transparent light guide plate 102 are: the human eye sight line can cross the splicing seam 106 to reach the display area of the liquid crystal panel after being modulated by the linear prism array 101 and the optical transparent light guide plate 102 together, thereby laying a foundation for realizing seamless complete large-screen display.

The side surface of the optically transparent light guide plate 102 may be a vertical surface, as shown in fig. 4; may be a sloped surface, as shown in fig. 11; may be curved as shown in fig. 12; or a combination of the above, as shown in fig. 13.

As shown in fig. 14, 15 and 16, the side surface of the optically transparent light guide plate at this time is an inclined surface, a curved surface, or a combination of a vertical surface and an inclined surface. Light rays (i.e., sight lines) emitted by human eyes at positions I, II or III can cross the splicing seams 106 to reach the display area of the liquid crystal panel after being modulated by the linear prism array and the optical transparent light guide plate.

It is preferable that the critical region of the linear prism is L1-1(L1-1 ═ L2+2 × H × tan [ arcsin (1/n)_Edge)]) The included angle theta between the base angle theta of each prism and the side face of the optical transparent light guide plate and the plane of the liquid crystal panel₀Should satisfy: theta + theta₀≥arcsin(1/n_Edge)°+arcsin(1/n_{Guide tube}) L2 is the width of the joint, H is the thickness of the optical transparent light guide plate, n_EdgeIs the refractive index, n, of the linear prism array 101_{Guide tube}Is the refractive index of the optically transparent light guide plate 102. As shown in fig. 17, 18 and 19.

H is the thickness of the optical transparent light guide plate, and the value range is 0mm < H <50 mm. The material of the optically transparent light guide plate 102 may be a plastic resin material (such as PMMA, PC, COC, POLYCARB, etc.); can be various glass materials (such as crown glass, flint glass, dense crown glass, dense flint glass or LA series glass); the material can also be made by a UV curing molding process, the material is UV glue, and the refractive index of the UV glue is not limited. In addition, various optical films (such as antireflection films) can be plated on the surface to improve the optical performance of the element.

It should be noted that the optically transparent light guide plate 102 and the linear prism array 101 may also be processed in an integrated manner, for example, as shown in fig. 20, so that the step of tightly attaching the optically transparent light guide plate 102 and the linear prism array 101 is omitted, and only the optically transparent light guide plate 102 needs to be tightly attached to the upper surface of the liquid crystal panel, and the lower surface of the liquid crystal panel needs to be tightly attached to the diffusion element, as shown in fig. 21. This way of integrated processing is also within the scope of protection of the utility model.

It should be noted that there are three cases in the actual machining assembly:

(1) each LCD liquid crystal panel corresponds to an individual optical transparent light guide plate 102, when the side surface of the optical transparent light guide plate 102 is not vertical, a central groove is formed in the splicing process of the adjacent transparent light guide plates, the central groove is positioned above the LCD splicing seam and covers the splicing seam, and the bottom angle of the central groove is positioned at the included angle theta between the side surface of the optical transparent light guide plate and the plane of the liquid crystal panel₀。

(2) A plurality of LCD liquid crystal panels correspond to an optical transparent light guide plate, taking 3 × 3 as an example, 3 LCD liquid crystal panels correspond to a whole optical transparent light guide plate, and the LCD liquid crystal panels are taken as a splicing unit, when the side surface of the optical transparent light guide plate 102 is not vertical, a central groove is formed in the adjacent transparent light guide plates in the splicing process, the central groove is positioned above the LCD splicing seams and covers the splicing seams, and the bottom angle of the central groove is positioned at the included angle theta between the side surface of the optical transparent light guide plate and the plane of the liquid crystal panel₀。

(3) In addition, the central groove of the optically transparent light guide plate can also be formed by pressing and carving on a complete flat plate.

[ diffusion member 104]

The diffusing element 104 is an optical element that can angularly diffuse incident light. The main functions are as follows: after the element is tightly attached to the liquid crystal panel 103, the problem of total reflection on the surface of the liquid crystal panel can be solved, so that the effective viewing angle of a seamless spliced complete large-screen picture observed by human eyes is increased. In the present invention, the diffusion angle is defined as: the angle of divergence of a beam of parallel light after it enters the diffusing element. As shown in fig. 22, the diffusion element 104 has three forms of light diffusion, which are respectively a point diffusion form illustrated in fig. 22, a horizontal or vertical single direction diffusion form and a horizontal and vertical simultaneous diffusion form. Wherein, lambda 1 is the horizontal diffusion angle of light in the vertical diffusion's of level sign, and lambda 2 is the vertical diffusion angle of light, is vertical diffusion when lambda 1 equals 0 and lambda 2 equals 0, is horizontal diffusion when lambda 1 equals 0 and lambda 2 equals 0, is the vertical all diffusion of level when lambda 1 equals 0 and lambda 2 equals 0. It should be noted that, in fact, any type of diffusion element can play the role described above, and the manufacturing method can be to add particles to play the role of diffusion or to manufacture a surface microstructure to play the role of diffusion or to play the role of diffusion in any other way, so long as the element can play a certain role of diffusion to light, which is all within the protection scope of the present invention.

Under the condition that the diffusion element is tightly attached to the back surface of the liquid crystal panel without leaving air, the larger the diffusion angle is, the more effective the solution of the total reflection problem is. The problem of total reflection is already improved when the diffusion angle is greater than 3 deg., and is already greatly improved when the diffusion angle is greater than 130 deg.. Therefore, the value of the diffusion angle should be in the range of 3 ° to 180 °, except that the larger the diffusion angle is, the lower the transmittance of the whole optical system is, and the lower the brightness of the liquid crystal panel is under the backlight condition of the liquid crystal panel of the same power, so the more preferable range is: 3 to 150 degrees.

The backlight source 105 is used for providing illumination with certain brightness for the liquid crystal panel 103, for example, the backlight source may be a backlight module owned by an LCD; can be an LED square lamp bead array; or an LED round lamp bead array; or LED bar array; or a lensed LED light source array; or a non-LED type array of lamp beads. In addition, backlight source can be through the grading design, can provide the illumination light source that each angle luminance is similar the same for liquid crystal display panel, and the type of above-mentioned backlight source all is in the protection scope of the utility model.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, and is provided by way of illustration only and not limitation. It will be apparent to those skilled in the art that, in light of the foregoing description, other variations and modifications may be made without departing from the scope of the invention.

Claims

1. A large-size seamless tiled display system, characterized in that: the system comprises a linear prism array, an optical transparent light guide plate, a liquid crystal panel, a diffusion element and a backlight light source; the linear prism array is tightly attached to the optical transparent light guide plate without leaving air, the optical transparent light guide plate is tightly attached to the upper surface of the liquid crystal panel without leaving air, and the lower surface of the liquid crystal panel is tightly attached to the diffusion element without leaving air.

2. The system of claim 1, wherein: the value range of the line width P of each small prism in the linear prism array is 0mm < P <1mm, theta is the base angle of the prism, and the value range is 0 degrees < theta <50 degrees.

3. The system of claim 2, wherein: the range of base angles θ of the prisms is: 0 degree<θ<arcsin(1/n_Edge)°，n_EdgeIs the index of refraction of the linear prism array.

4. The system of claim 1, wherein: the side surface of the optical transparent light guide plate can be a vertical surface, an inclined surface, a curved surface or a combined surface of the surfaces; wherein, the contained angle of optics transparent light guide plate side and liquid crystal panel plane satisfies: theta is not less than 45 degrees₀≤90°。

5. The system of claim 1, wherein: the prism tooth surface of the linear prism array does not face the liquid crystal panel.

6. The system of claim 1, wherein: the optical transparent light guide plate is a flat plate made of glass, acrylic or other transparent materials, and the thickness H of the optical transparent light guide plate is in a value range as follows: 0mm < H <50 mm.

7. The system of claim 1, wherein the critical area of the linear prism array is L1-1(L1-1 ═ L2+2 × H × tan [ arcsin (1/n)_Edge)]) The base angle theta of each prism and the included angle theta between the side surface of the optical transparent light guide plate and the plane of the liquid crystal panel₀Should satisfy: theta + theta₀≥arcsin(1/n_Edge)°+arcsin(1/n_{Guide tube}) L2 is the width of the joint, H is the thickness of the optical transparent light guide plate, n_EdgeIs the refractive index of the linear prism array, n_{Guide tube}Is the refractive index of the optically transparent light guide plate.

8. The system of claim 4, wherein: the included angle between the side surface of the optical transparent light guide plate and the plane of the liquid crystal panel meets the following requirements: arcsin (1/n)_{Light guiding})°≤θ₀Not more than 90 degrees, wherein n_{Light guiding}Is the refractive index of the optically transparent light guide plate.