Backlight structure of display screen
By improving the backlight structure of the LCD screen and adopting a new connection method between the bonding unit and the light guide plate, light energy loss is reduced and the light guide plate design is optimized, thus solving the problem of insufficient brightness in traditional LCD screens and achieving higher brightness and uniformity.
Patent Information
- Application Number
- CN202423307731.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Traditional LCD screens suffer from light loss and reduced brightness due to double-sided adhesive and optical microprism structures in their backlight design, making it difficult to meet high-brightness display requirements.
A novel connection method is adopted between the adhesive unit and the light guide plate, which reduces the direct contact between the adhesive strip and the light and optimizes the structural design of the light guide plate to reduce diffuse reflection and improve the light energy utilization rate.
It effectively reduces light energy loss, improves display brightness and light efficiency, enhances light uniformity, and improves visual effects.
Smart Images
Figure CN223784597U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a backlight structure, and more particularly to a structure for efficient light energy transmission and brightness enhancement applied to a liquid crystal display screen. Background Technology
[0002] As is well known, LCD screens are widely used in various electronic devices, such as televisions, mobile phones, and computers. The display effect of an LCD screen largely depends on the brightness and uniformity of its backlight system. LCD screens themselves do not emit light; therefore, they rely on a backlight to provide illumination. The light emitted by the backlight passes through the liquid crystal layer and combines with color filters to ultimately form a color image. Therefore, the brightness of the backlight system directly affects the visual effect of the display screen.
[0003] To improve the brightness of LCD screens, traditional LCD screen backlight structures, such as Figures 1 to 4 As shown, it includes a surface-mount light-emitting diode (1'), a flexible circuit board (2'), and a light guide plate (3'). The surface-mount light-emitting diode (1') is connected to one side of the flexible circuit board (2') and is used to emit light (L1'). The front end of the light guide plate (3') is connected to the other side of the flexible circuit board (2') and is used to guide the light (L1'). Double-sided adhesive tape (4') is connected between the light guide plate (3') and the flexible circuit board (2').
[0004] The basic structure and working principle of traditional LCD screens are as follows: Figure 2 As shown: When the surface-mount LED (1') is powered on, the light emitted by it (L1') first passes through the flexible circuit board (2'). Since the flexible circuit board (2') and the light guide plate (3') are bonded and fixed together by the double-sided adhesive (4'), some of the light (L1') loses light energy due to its light absorption characteristics when passing through the double-sided adhesive (4'), resulting in light loss (L2'), which in turn reduces the brightness of the display screen.
[0005] The remaining light (L1') eventually enters the interior of the light guide plate (3'), and the light (L1') is evenly distributed throughout the backlight area of the entire display screen through internal reflection and light guiding.
[0006] In addition, such as Figures 4 to 5As shown, the end of the light guide plate (3') is provided with an optical microprism structure (5'), wherein the optical microprism structure (5') is a sawtooth design. The optical microprism structure (5') corresponds to the light-emitting port of the patch light-emitting diode (1'). The optical microprism structure (5') is used to increase the refractive surface of light, so that the light (L1') entering the light guide plate (3') can be refracted at different angles to enhance the uniformity of light distribution inside the light guide plate (3'), thereby improving the uniformity of light (L1') of the patch light-emitting diode (1').
[0007] However, the structure of the traditional liquid crystal display screen described above has many drawbacks, which are described below.
[0008] First, the double-sided adhesive (4') is used to bond and fix the light guide plate (3') and the flexible circuit board (2'). However, since the double-sided adhesive (4') has certain light absorption characteristics, some light (L1') is absorbed in the process of passing through the double-sided adhesive (4'), resulting in light loss (L2'), which leads to a decrease in the brightness of the display screen.
[0009] Secondly, although the optical microprism structure (5') on the light guide plate (3') can increase the refractive surface, the sawtooth surface of the optical microprism structure (5') will cause multiple diffuse reflections of light (L1'), further resulting in light loss (L2'). These light losses (L2') lead to a reduction in the overall brightness of the display screen, making it difficult to meet the requirements of high brightness display.
[0010] In summary, these are the main drawbacks of traditional display screen backlight structures. Summary of the Invention
[0011] The technical solution adopted by this utility model is as follows: a backlight structure of a display screen, including an LED light source (10), a flexible circuit board (20) and an adhesive unit (30). The LED light source (10) is disposed on one side of the top surface of the flexible circuit board (20), and the adhesive unit (30) is connected to the other side of the top surface of the flexible circuit board (20). The backlight structure of the display screen also includes a light guide plate (40), wherein the light guide plate (40) corresponds to the LED light source (10), the light guide plate (40) is disposed at one end of the LED light source (10), and the front end of the light guide plate (40) is fixedly connected to the flexible circuit board (20) through the adhesive unit (30).
[0012] The top surface of the flexible circuit board (20) is provided with a light source connection area (21) and an adhesive strip bonding area (22), wherein the light source connection area (21) and the adhesive strip bonding area (22) are located on both sides of the top surface of the flexible circuit board (20).
[0013] The LED light source (10) is connected to the light source connection area (21), the adhesive unit (30) is connected to the adhesive strip adhesion area (22), the light guide plate (40) is connected to the adhesive unit (30), the LED light source (10) has a light outlet (11) and a light source connection surface (12), wherein the light outlet (11) is located at one end of the LED light source (10), and the light source connection surface (12) is located at the bottom of the LED light source (10).
[0014] The light source connection surface (12) is connected to the light source connection area (21) of the flexible circuit board (20), and the adhesive unit (30) is disposed at the front end of the light outlet (11).
[0015] The light guide plate (40) has a light inlet (41) located at one end of the light guide plate (40). The light inlet (41) corresponds to the light outlet (11) of the LED light source (10). The light inlet (41) is located at the front end of the light outlet (11).
[0016] The adhesive unit (30) includes several adhesive strips (31), wherein the adhesive strips (31) are arranged at certain intervals on the adhesive strip bonding area (22), and each adhesive strip (31) has a first side (311) and a second side (312), wherein the first side (311) and the second side (312) are respectively located on both sides of the adhesive strip (31).
[0017] A light source channel (32) is formed by the first side (311) of the adhesive strip (31), the second side (312) of another adhesive strip (31) opposite to the adhesive strip (31), and the top surface of the adhesive strip bonding area (22).
[0018] The light outlet (11) of the LED light source (10) corresponds to the light source channel (32), and the light outlet (11) is located at one end of the light source channel (32). The light inlet (41) of the light guide plate (40) corresponds to the light source channel (32), and the light inlet (41) is located at the other end of the light source channel (32).
[0019] The beneficial effects of this utility model are as follows: This utility model provides a backlight structure for a display screen, which effectively reduces light energy loss and improves the brightness of the display screen by reducing the direct contact between the adhesive strip and the light.
[0020] This invention provides a backlight structure for a display screen, which optimizes the design of the light guide plate structure, reduces diffuse reflection of light by the microprism structure, reduces unnecessary light energy loss, and allows more light to be effectively transmitted to the display area, thereby improving the light efficiency of the backlight system.
[0021] This invention provides a backlight structure for a display screen, which enhances the uniformity of light in the backlight system by improving optical design, thereby improving the overall brightness and visual effect of the display screen and enhancing the user experience.
[0022] This invention provides a backlight structure for a display screen, which improves the matching of the backlight source and the light guide system, so that the light is evenly distributed in the light guide plate, thereby improving the display effect and reducing brightness loss. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the basic structure of a traditional liquid crystal display screen.
[0024] Figure 2 This is a structural diagram illustrating the working principle of a traditional liquid crystal display screen.
[0025] Figure 3 This is a schematic diagram showing the basic structure and working principle of a traditional LCD screen from a top-down perspective.
[0026] Figure 4 This is a schematic diagram of the structure of a traditional LCD screen viewed from above.
[0027] Figure 5 This is a schematic diagram of the structure of a traditional liquid crystal display screen where light undergoes diffuse reflection.
[0028] Figure 6 This is a schematic diagram of the basic structure of this utility model.
[0029] Figure 7 This is a schematic diagram of the basic structure of this utility model from a top view.
[0030] Figure 8 This is a schematic diagram illustrating the working principle of this utility model from a top-down perspective.
[0031] Figure 9 This is a cross-sectional schematic diagram of the structure of this utility model.
[0032] Figure 10 This is a top-view structural diagram of the present invention.
[0033] Figure 11 This is a schematic diagram illustrating the working principle of the polished mirror surface of the light guide plate of this utility model. Detailed Implementation
[0034] like Figures 6 to 11 As shown, a backlight structure for a display screen includes an LED light source (10), a flexible circuit board (20), and an adhesive unit (30), wherein...
[0035] like Figure 6As shown, the LED light source (10) is disposed on one side of the top surface of the flexible circuit board (20), and the adhesive unit (30) is connected to the other side of the top surface of the flexible circuit board (20).
[0036] The backlight structure of the display screen also includes a light guide plate (40), which corresponds to the LED light source (10) and is disposed at one end of the LED light source (10).
[0037] The front end of the light guide plate (40) is fixedly connected to the flexible circuit board (20) by the adhesive unit (30).
[0038] Furthermore, the top surface of the flexible circuit board (20) is provided with a light source connection area (21) and an adhesive strip bonding area (22), wherein the light source connection area (21) and the adhesive strip bonding area (22) are respectively located on both sides of the top surface of the flexible circuit board (20).
[0039] The LED light source (10) is connected to the light source connection area (21), the adhesive unit (30) is connected to the adhesive strip adhesive area (22), and the light guide plate (40) is connected to the adhesive unit (30).
[0040] Furthermore, such as Figures 6 to 8 As shown, the LED light source (10) has a light outlet (11) and a light source connection surface (12), wherein the light outlet (11) is located at one end of the LED light source (10) and the light source connection surface (12) is located at the bottom of the LED light source (10).
[0041] The light source connection surface (12) is connected to the light source connection area (21) of the flexible circuit board (20), and the adhesive unit (30) is disposed at the front end of the light outlet (11).
[0042] The light guide plate (40) has a light inlet (41) located at one end of the light guide plate (40).
[0043] The light inlet (41) corresponds to the light outlet (11) of the LED light source (10), and the light inlet (41) is located at the front end of the light outlet (11).
[0044] The light emitted from the light outlet (11) (L) can enter the light guide plate (40) through the light inlet (41).
[0045] In practice, the adhesive unit (30) includes several adhesive strips (31), wherein several adhesive strips (31) are arranged at certain intervals on the adhesive strip bonding area (22).
[0046] Each of the adhesive strips (31) has a first side (311) and a second side (312), wherein the first side (311) and the second side (312) are located on both sides of the adhesive strip (31).
[0047] In practice, a light source channel (32) is formed by the first side (311) of the adhesive strip (31), the second side (312) of another adhesive strip (31) opposite to the adhesive strip (31), and the top surface of the adhesive strip bonding area (22).
[0048] The light outlet (11) of the LED light source (10) corresponds to the light source channel (32), and the light outlet (11) is located at one end of the light source channel (32).
[0049] The light inlet (41) of the light guide plate (40) corresponds to the light source channel (32), and the light inlet (41) is located at the other end of the light source channel (32).
[0050] When working, the light (L) emitted from the light outlet (11) of the LED light source (10) can enter the light guide plate (40) through the light source channel (32). At the same time, with the help of the light source channel (32), the light (L) can avoid direct contact with the adhesive strip (31), thereby avoiding light loss due to the light absorption characteristics of the adhesive strip (31).
[0051] In practice, the light inlet (41) is a polished mirror surface.
[0052] like Figure 9 As shown, the light guide plate (40) also has a light transmission surface (42) and a reflective surface (43), wherein the light transmission surface (42) is disposed on the top side of the light guide plate (40) and the reflective surface (43) is disposed on the bottom side of the light guide plate (40).
[0053] The front end of the reflective surface (43) is connected to the adhesive strip bonding area (22) of the flexible circuit board (20) via the adhesive unit (30).
[0054] like Figures 9 to 10 As shown, the backlight structure of the display screen also includes an optical film (50), wherein the optical film (50) is connected to the light transmission surface (42) of the light guide plate (40).
[0055] In practice, there is an optical path distance (D) between the optical film (50) and the light outlet (11).
[0056] The backlight structure of the display also includes an optical reflective film (60), wherein the optical reflective film (60) is attached to the reflective surface (43) of the light guide plate (40).
Claims
1. A backlight structure for a display screen, comprising an LED light source (10), a flexible circuit board (20), and an adhesive unit (30), wherein the LED light source (10) is disposed on one side of the top surface of the flexible circuit board (20), and the adhesive unit (30) is connected to the other side of the top surface of the flexible circuit board (20), and the backlight structure further comprises a light guide plate (40), wherein, The light guide plate (40) corresponds to the LED light source (10). The light guide plate (40) is disposed at one end of the LED light source (10). The front end of the light guide plate (40) is fixedly connected to the flexible circuit board (20) by the adhesive unit (30). The top surface of the flexible circuit board (20) is provided with a light source connection area (21) and an adhesive strip bonding area (22), wherein the light source connection area (21) and the adhesive strip bonding area (22) are respectively located on both sides of the top surface of the flexible circuit board (20). The LED light source (10) is connected to the light source connection area (21), the adhesive unit (30) is connected to the adhesive strip adhesion area (22), and the light guide plate (40) is connected to the adhesive unit (30). The LED light source (10) has a light outlet (11) and a light source connection surface (12). The light outlet (11) is located at one end of the LED light source (10), and the light source connection surface (12) is located at the bottom of the LED light source (10). The light source connection surface (12) is connected to the light source connection area (21) of the flexible circuit board (20), and the adhesive unit (30) is disposed at the front end of the light outlet (11). The light guide plate (40) has a light inlet (41) located at one end of the light guide plate (40). The light inlet (41) corresponds to the light outlet (11) of the LED light source (10). The light inlet (41) is located at the front end of the light outlet (11). The light guide plate is characterized by: The adhesive unit (30) includes several adhesive strips (31), wherein the adhesive strips (31) are arranged at certain intervals on the adhesive strip bonding area (22), and each adhesive strip (31) has a first side (311) and a second side (312), wherein the first side (311) and the second side (312) are respectively located on both sides of the adhesive strip (31). A light source channel (32) is formed by the first side (311) of the adhesive strip (31), the second side (312) of another adhesive strip (31) opposite to the adhesive strip (31), and the top surface of the adhesive strip bonding area (22). The light outlet (11) of the LED light source (10) corresponds to the light source channel (32), and the light outlet (11) is located at one end of the light source channel (32). The light inlet (41) of the light guide plate (40) corresponds to the light source channel (32), and the light inlet (41) is located at the other end of the light source channel (32).
2. The backlight structure of a display screen as described in claim 1, characterized in that: The light inlet (41) is a polished mirror surface.
3. The backlight structure of a display screen as described in claim 1, characterized in that: The light guide plate (40) also has a light transmitting surface (42) and a reflective surface (43), wherein the light transmitting surface (42) is disposed on the top side of the light guide plate (40), and the reflective surface (43) is disposed on the bottom side of the light guide plate (40). The front end of the reflective surface (43) is connected to the adhesive strip bonding area (22) of the flexible circuit board (20) via the adhesive unit (30).
4. The backlight structure of a display screen as described in claim 3, characterized in that: The backlight structure of the display also includes an optical film (50), wherein the optical film (50) is connected to the light transmission surface (42) of the light guide plate (40).
5. The backlight structure of a display screen as described in claim 4, characterized in that: There is an optical path distance (D) between the optical film (50) and the light outlet (11).
6. The backlight structure of a display screen as described in claim 3, characterized in that: The backlight structure of the display also includes an optical reflective film (60), wherein the optical reflective film (60) is attached to the reflective surface (43) of the light guide plate (40).