Structure and method for flexibly adjusting the light output angle of backlight

Abstract

The present invention belongs to the field of display technology, and specifically provides a method for flexibly adjusting the light emission angle of backlight, comprising the following steps: placing an LED light board horizontally at the bottom of a backlight cavity, and horizontally bonding a Fresnel lens to the LED light board with an adhesive; simulating the arrangement of LEDs on the light board, the tooth shape of each ring band of the Fresnel lens, and the vertical bonding distance between the LED light board and the Fresnel lens, so that the light emitted by the LED is emitted as parallel light after passing through the Fresnel lens; two sets of height adjustment sliders and the LED light board are connected by two transparent elastic bodies, and when the two sets of height adjustment sliders slide up and down, the corresponding transparent elastic bodies are compressed and stretched, driving the LED light board and the bonded Fresnel lens to rotate at a small angle in the backlight cavity, thereby flexibly changing the light emission angle of the backlight in the horizontal direction, realizing flexible offset of the backlight, and improving the applicability of liquid crystal display modules in special environments.

Description

Technical Field

[0001] The present invention belongs to the field of display technology, and particularly relates to a structure and method for flexibly adjusting the light emission angle of backlight light. Background Art

[0002] Liquid crystal display panels do not emit light themselves, but only change local transmission and reflection characteristics under the control of electric fields. A complete liquid crystal display requires a backlight for illumination and is widely used in mobile phones, televisions, computers and other fields. The common maximum brightness parameter in liquid crystal displays refers to the maximum brightness in the center normal direction. However, when liquid crystal displays are installed in special environments such as smart cockpits and aircraft, due to the limitations of the installation location and environmental space, the human eye does not view the display in the normal direction. The improvement of the display normal brightness cannot meet the needs of viewers. On this basis, a structure and method for flexibly adjusting the light output angle of the backlight are proposed. Summary of the Invention

[0003] The present invention aims to provide a structure and method for flexibly adjusting the light emission angle of backlight light, so as to solve the technical problems raised in the above background technology.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is:

[0005] A structure for flexibly adjusting the angle of backlight light emission includes a backlight cavity, support columns are provided on both sides of the backlight cavity, and each group of support columns is provided with a height adjustment slider; an LED light board is placed horizontally on the bottom surface of the backlight cavity, and a Fresnel lens is horizontally bonded to the surface of the LED light board via adhesive;

[0006] The two sets of height adjustment sliders are connected to the two ends of the LED light board through transparent elastic bodies. When the two sets of height adjustment sliders slide up and down, they drive the LED light board and the Fresnel lens to rotate at an angle in the backlight cavity, thereby changing the horizontal light output angle of the backlight.

[0007] The present invention provides a method for flexibly adjusting the light output angle of a backlight, comprising the following steps:

[0008] Place the LED light board horizontally at the bottom of the backlight cavity, and glue a Fresnel lens horizontally on the LED light board with adhesive;

[0009] The simulation design includes the LED layout on the light board, the tooth shape of each ring of the Fresnel lens, and the vertical bonding distance between the LED light board and the Fresnel lens. This ensures that the light emitted by the LED is emitted as parallel light after passing through the Fresnel lens, improving the collimation of the output light.

[0010] The two sets of height adjustment sliders and the LED light panel are connected by two transparent elastic bodies. When the two sets of height adjustment sliders slide up and down, the corresponding transparent elastic bodies will be compressed and stretched, driving the LED light panel and the bonded Fresnel lens to rotate at a small angle in the backlight cavity, flexibly changing the horizontal light output angle of the backlight.

[0011] A further improvement is that elongated holes are opened on both sides of the backlight cavity, and the diameter of the support column is larger than the width of the elongated holes, which can reflect the light passing through the elongated holes back into the backlight cavity as much as possible to reduce light leakage.

[0012] A further improvement is that the exterior of the backlight cavity is subjected to a light-isolating treatment such as blackening or painting after being subjected to a reflective treatment to prevent external light leakage.

[0013] A further improvement is that the ring shaft of the height adjustment slider is sleeved on the support column to adjust the height up and down.

[0014] The present invention provides a structure for flexibly adjusting the light emission angle of a backlight, comprising a backlight cavity, support columns provided on both sides of the backlight cavity, and a height adjustment slider sleeved on each group of the support columns; an LED light board is horizontally placed on the bottom surface of the backlight cavity, a Fresnel lens is horizontally bonded to the surface of the LED light board via an adhesive, and a transparent micro-lens array is provided above the Fresnel lens;

[0015] The two sets of height adjustment sliders are connected to the two ends of the transparent micro-lens array through transparent elastic bodies. When the two sets of height adjustment sliders slide up and down, they drive the transparent micro-lens array to rotate in the backlight cavity, thereby changing the horizontal light output angle of the backlight.

[0016] The present invention also provides a method for flexibly adjusting the light output angle of backlight, comprising the following steps:

[0017] The LED light board is placed horizontally at the bottom of the backlight cavity, and a Fresnel lens is horizontally bonded to the LED light board with adhesive;

[0018] The simulation design includes the LED layout on the light board, the tooth shape of each ring of the Fresnel lens, and the vertical bonding distance between the LED light board and the Fresnel lens. This ensures that the light emitted by the LED is emitted as parallel light after passing through the Fresnel lens, improving the collimation of the output light.

[0019] The two sets of height adjustment sliders and the transparent micro-lens array are connected by two transparent elastic bodies. When the two sets of height adjustment sliders slide up and down, the corresponding transparent elastic bodies will be compressed and stretched, driving the transparent micro-lens array to rotate at a small angle in the backlight cavity. According to the requirements of the environment, the horizontal light output angle of the backlight can be flexibly changed.

[0020] A further improvement is that elongated holes are opened on both sides of the backlight cavity, and the diameter of the support column is larger than the width of the elongated holes, which can reflect the light passing through the elongated holes back into the backlight cavity as much as possible to reduce light leakage.

[0021] A further improvement is that the exterior of the backlight cavity is subjected to a light-isolating treatment such as blackening or painting after being subjected to a reflective treatment to prevent external light leakage.

[0022] A further improvement is that the ring shaft of the height adjustment slider is sleeved on the support column to adjust the height up and down.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides two structural designs for changing the light output angle of a direct-lit backlight. Height-adjustable sliders are installed on both sides of the backlight cavity to drive the LED light panel or transparent microlens array to rotate at a small angle within the backlight cavity, thereby achieving flexible offset of the backlight light and improving the applicability of the liquid crystal display module in special environments.

[0025] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of a structure for flexibly adjusting the light emission angle of backlight provided by embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure for flexibly adjusting the light emission angle of the backlight provided in Example 1 of the present invention rotated 10° to the right;

[0028] Figure 3 This is a schematic diagram of the structure for flexibly adjusting the light emission angle of the backlight provided in Example 1 of the present invention rotated 10° to the left;

[0029] Figure 4 This is a schematic diagram of a structure for flexibly adjusting the light emission angle of backlight provided by embodiment 2 of the present invention;

[0030] Figure 5 Schematic diagram of a structure for flexibly adjusting the light emission angle of backlight provided in Example 2 of the present invention, rotated 10° to the right;

[0031] Figure 6 Schematic diagram of a structure for flexibly adjusting the light emission angle of backlight provided in Example 2 of the present invention, rotated 10° to the left;

[0032] Figure 7 This is the path of the light in Example 2 passing through the transparent microlens array rotated 10° horizontally to the left.

[0033] Reference numerals:

[0034] 1. Support column; 2. Height adjustment slider; 3. Transparent elastomer; 4. Adhesive; 5. LED light board; 6. Fresnel lens; 7. Backlight cavity; 8. Transparent microlens array. DETAILED DESCRIPTION

[0035] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0036] In the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "provided with" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances. Example 1

[0037] This embodiment provides a technical solution for flexibly adjusting the light angle of the backlight, specifically a design solution for rotating the bottom backlight LED light board. Figure 1 As shown, its structure is mainly composed of a support column 1, a height adjustment slider 2, a transparent elastomer 3, an adhesive 4, an LED light board 5, a Fresnel lens 6 and a backlight cavity 7.

[0038] A method for rotating a bottom backlight LED light panel, comprising the following steps:

[0039] The LED light board 5 is placed horizontally at the bottom of the backlight cavity 7. The lamp beads are white light LEDs with a regular size of 3×3mm and a light-emitting angle of 120°. A Fresnel lens 6 is horizontally bonded to the LED light board 5 with adhesive 4.

[0040] The arrangement of LEDs on the light board, the tooth shape of each ring of the Fresnel lens 6, and the vertical bonding distance between the LED light board 5 and the Fresnel lens 6 are simulated and designed, so that the light emitted by the LED is emitted as parallel light after passing through the Fresnel lens 6, thereby improving the collimation of the emitted light.

[0041] The left and right height adjustment sliders 2 and the LED light board 5 are connected by two transparent elastic bodies 3. When the height adjustment slider 2 slides up and down, the left and right transparent elastic bodies 3 will be compressed and stretched, driving the LED light board 5 and the bonded Fresnel lens 6 to rotate at a small angle within the backlight cavity 7, ranging from -10 to 10 degrees, so that the horizontal light output angle of the backlight can be flexibly changed according to the needs of the environment. Figure 2 and 3 shown.

[0042] In this embodiment, slender holes are opened inside and outside the left and right sides of the backlight cavity 7. The slender holes opened on both sides of the backlight cavity 1 are used for the height adjustment slider 2 to connect the LED light board 5 inside the backlight cavity 1 for height adjustment. There are two cylindrical support columns 1 inside the backlight cavity 7 structure. The interior of the backlight cavity 7 structure and the surface of the support column 1 are sprayed with reflective material. The diameter of the support column 1 is larger than the width of the slender hole, which can reflect the light passing through the slender hole back into the backlight cavity 7 as much as possible to reduce light leakage. At the same time, the external area of ​​the backlight cavity 7 is reflectively treated and then subjected to a layer of blackening, painting and other light-isolating treatments to avoid external light leakage.

[0043] In this embodiment, the ring shaft of the height adjustment slider 2 is sleeved on the support column 1 to adjust the height up and down. The height adjustment slider 2 is connected to the transparent elastic body 3 inside the backlight cavity 7, and the other end of the transparent elastic body 3 is connected to the LED light board 5. When the height adjustment slider 2 adjusts the height, the transparent elastic bodies 3 arranged on the left and right will be stretched or compressed in the cavity, thereby driving the connected LED light board 5 to rotate at a small angle in the backlight cavity 7, ranging from (-10~10°), thereby realizing flexible offset of the backlight light and improving the applicability of the liquid crystal display module in special environments. Example 2

[0044] This embodiment provides a technical solution for flexibly adjusting the light output angle of the backlight, specifically a design solution for rotating a transparent micro-lens array. Figure 4 As shown, its structure is mainly composed of a support column 1, a height adjustment slider 2, a transparent elastomer 3, an adhesive 4, an LED light board 5, a Fresnel lens 6, a backlight cavity 7 and a transparent microlens array 8.

[0045] A method for rotating a transparent microlens array comprises the following steps:

[0046] The LED light board 5 is placed horizontally at the bottom of the backlight cavity 7. The lamp beads are white light LEDs with a regular size of 3×3mm and a light-emitting angle of 120°. A Fresnel lens 6 is horizontally bonded to the LED light board 5 with adhesive 4.

[0047] The arrangement of LEDs on the light board, the tooth shape of each ring of the Fresnel lens 6, and the vertical bonding distance between the LED light board 5 and the Fresnel lens 6 are simulated and designed, so that the light emitted by the LED is emitted as parallel light after passing through the Fresnel lens 6, thereby improving the collimation of the emitted light.

[0048] The two sets of height adjustment sliders 2 and the transparent micro lens array 8 are connected by two transparent elastic bodies 3. When the height adjustment sliders 2 slide up and down, the stretchable and compressible transparent elastic bodies 3 are driven to slide up and down, causing the transparent micro lens array 8 to rotate within a range of (-10~10°), thereby flexibly changing the light output direction of the backlight as needed, such as Figure 5-6 As shown, the path of light passing through the transparent microlens array 8 rotated 10° to the left horizontally is as follows: Figure 7 shown.

[0049] In this embodiment, slender holes are opened inside and outside the left and right sides of the backlight cavity 7. The slender holes opened on both sides of the backlight cavity 1 are used for the height adjustment slider 2 to connect the transparent microlens array 8 inside the backlight cavity 1 for height adjustment. There are two cylindrical support columns 1 inside the backlight cavity 7 structure. The interior of the backlight cavity 7 structure and the surface of the support columns 1 are sprayed with reflective material. The diameter of the support columns 1 is larger than the width of the slender holes, which can reflect the light passing through the slender holes back into the backlight cavity 7 as much as possible to reduce light leakage. At the same time, the external area of ​​the backlight cavity 7 is reflectively treated and then subjected to a layer of blackening, painting and other light-isolating treatments to avoid external light leakage.

[0050] In this embodiment, the ring shaft of the height adjustment slider 2 is sleeved on the support column 1 to adjust the height up and down. The height adjustment slider 2 is connected to the transparent elastomer 3 inside the backlight cavity 7, and the other end of the transparent elastomer 3 is connected to the transparent microlens array 8. When the height adjustment slider 2 adjusts the height, the transparent elastomers 3 arranged on the left and right will be stretched or compressed in the cavity, thereby driving the connected transparent microlens array 8 to rotate at a small angle in the backlight cavity 7, ranging from -10~10°, to achieve flexible offset of the backlight light and improve the applicability of the liquid crystal display module in special environments.

[0051] In summary, the present invention provides two structural designs for changing the light output angle of a direct-lit backlight. Height-adjustment sliders are installed on both sides of the backlight cavity to drive the LED light board or transparent microlens array to rotate at a small angle within the backlight cavity, thereby achieving flexible offset of the backlight light and improving the applicability of the liquid crystal display module in special environments.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A structure for flexibly adjusting the angle of backlight light, including a backlight cavity, characterized by: Support columns are provided on both sides of the backlight cavity, and each group of support columns is provided with a height adjustment slider; an LED light board is placed horizontally on the bottom surface of the backlight cavity, and a Fresnel lens is provided horizontally on the surface of the LED light board; The two sets of height adjustment sliders are connected to the two ends of the LED light board through transparent elastic bodies. When the two sets of height adjustment sliders slide up and down, they drive the LED light board and the Fresnel lens to rotate at an angle in the backlight cavity, thereby changing the horizontal light output angle of the backlight.

2. A method for flexibly adjusting the light output angle of the backlight, characterized in that: The following steps are involved: Place the LED light board horizontally at the bottom of the backlight cavity, and glue a Fresnel lens horizontally on the LED light board with adhesive; The arrangement of LEDs on the light board, the tooth shape of each ring of the Fresnel lens, and the vertical bonding distance between the LED light board and the Fresnel lens were simulated and designed, so that the light emitted by the LED is emitted as parallel light after passing through the Fresnel lens; The two sets of height adjustment sliders and the LED light panel are connected by two transparent elastic bodies. When the two sets of height adjustment sliders slide up and down, the corresponding transparent elastic bodies will be compressed and stretched, driving the LED light panel and the bonded Fresnel lens to rotate at a small angle in the backlight cavity, flexibly changing the horizontal light output angle of the backlight.

3. The method for flexibly adjusting the backlight angle according to claim 2, wherein: Both sides of the backlight cavity are provided with elongated holes, and the diameter of the supporting column is larger than the width of the elongated holes.

4. The method for flexibly adjusting the backlight angle according to claim 2, wherein: The exterior of the backlight cavity is treated with a reflective treatment and then subjected to a layer of blackening and a light-isolating paint treatment.

5. The method for flexibly adjusting the backlight angle according to claim 2, wherein: The ring shaft of the height adjustment slider is sleeved on the support column to adjust the height up and down.

6. A structure for flexibly adjusting the angle of the backlight light, including a backlight cavity, is characterized by: Support columns are provided on both sides of the backlight cavity, and each group of support columns is provided with a height adjustment slider; an LED light board is placed horizontally on the bottom surface of the backlight cavity, and a Fresnel lens is provided horizontally on the surface of the LED light board, and a transparent micro-lens array is provided above the Fresnel lens; The two sets of height adjustment sliders are connected to the two ends of the transparent micro-lens array through transparent elastic bodies. When the two sets of height adjustment sliders slide up and down, they drive the transparent micro-lens array to rotate in the backlight cavity, thereby changing the horizontal light output angle of the backlight.

7. A method for flexibly adjusting the light output angle of the backlight, characterized in that: The following steps are involved: The LED light board is placed horizontally at the bottom of the backlight cavity, and a Fresnel lens is horizontally bonded to the LED light board with adhesive; The arrangement of LEDs on the light board, the tooth shape of each ring of the Fresnel lens, and the vertical bonding distance between the LED light board and the Fresnel lens were simulated and designed, so that the light emitted by the LED is emitted as parallel light after passing through the Fresnel lens; The two sets of height adjustment sliders and the transparent micro-lens array are connected by two transparent elastic bodies. When the two sets of height adjustment sliders slide up and down, the corresponding transparent elastic bodies will be compressed and stretched, driving the transparent micro-lens array to rotate at a small angle in the backlight cavity. According to the requirements of the environment, the horizontal light output angle of the backlight can be flexibly changed.

8. The method for flexibly adjusting the backlight angle according to claim 7, wherein: Both sides of the backlight cavity are provided with elongated holes, and the diameter of the supporting column is larger than the width of the elongated holes.

9. The method for flexibly adjusting the backlight angle according to claim 7, wherein: The exterior of the backlight cavity is treated with a reflective treatment and then subjected to a layer of blackening and a light-isolating paint treatment.

10. The method for flexibly adjusting the light output angle of backlight according to claim 7, characterized in that: The ring shaft of the height adjustment slider is sleeved on the support column to adjust the height up and down.

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