Structure capable of adjusting effective light-emitting area of LTPS liquid crystal backlight
By designing adjustable horizontal and vertical telescopic black screen components on the LCD backlight module, the problem of the LCD backlight module being unable to match different resolutions or display ratios is solved, achieving a perfect match between the effective backlight emitting area and the panel size, and reducing testing and verification costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TRULY (RENSHOU) HIGH-END DISPLAY TECH LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional LCD backlight modules have a fixed size and cannot be matched with different resolutions or display ratios, resulting in black borders or invalid backlight areas, which affects LCD design evaluation.
The design incorporates horizontally and vertically retractable black curtain components, with the effective backlight emission area adjusted by driving a winding and extension mechanism to match the panel size.
This achieves a perfect match between the effective backlight emission area and the panel size, reducing relative displacement during test movement and lowering test verification costs.
Smart Images
Figure CN224137588U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of liquid crystal backlight module technology, and more specifically, to a structure of an adjustable LTPS liquid crystal backlight effective light-emitting area. Background Technology
[0002] The backlight size used in current testing and verification panel designs may not be a perfect match. Traditional LCD backlight modules, due to their fixed size, cannot be matched with different resolutions or display ratios (such as 16:9 to 21:9), resulting in black borders or ineffective backlight areas. During the testing and verification phase, this leads to significant discrepancies between the collected optical and liquid crystal characteristic data and the actual data, affecting the evaluation of the LCD design and impacting the design and development progress.
[0003] Based on this, this patent designs an adjustable LTPS (low-temperature polycrystalline silicon) liquid crystal backlight effective light-emitting area structure, which can be matched with different sizes according to the panel design size. Utility Model Content
[0004] The technical problem to be solved by this application is that traditional LCD backlight modules, due to their fixed size, cannot be matched with different resolutions or display ratios, resulting in black borders or invalid backlight areas.
[0005] To address the aforementioned technical problems, this application provides a structure for adjusting the effective light-emitting area of LTPS liquid crystal backlight, employing the following technical solution:
[0006] It includes a horizontally retractable black screen assembly and a vertically retractable black screen assembly; the horizontally retractable black screen assembly and the vertically retractable black screen assembly are arranged on adjacent length and width sides of the backlight, and the two are arranged perpendicularly to each other;
[0007] The horizontally retractable black curtain assembly and the vertically retractable black curtain assembly have the same structure, both including a black curtain roll and a retractable black curtain. The black curtain roll has a roller inside, and the two ends of the roller are rotatably connected to the two end walls of the black curtain roll. One end of the retractable black curtain is wound around the roller, and the other end is led out through a through hole on the black curtain roll. The black curtain roll has a drive winding mechanism on the outside, which is connected to one end of the roller and is used to wind up the retractable black curtain. The black curtain roll also has a drive extension mechanism on the outside to drive the retractable black curtain to extend.
[0008] Furthermore, the drive extension mechanism includes a guide rail disposed on the same side of the through hole, and a fixed slide and a movable slide are provided on the guide rail. The fixed slide is fixed to the guide rail by bolts, and the movable slide is slidably disposed between the guide rail and the guide rail.
[0009] The outer end of the telescopic black curtain is provided with a fixing strip, and the lower end faces of the fixed slide and the movable slide are connected to the fixing strip through a telescopic rod;
[0010] Furthermore, a telescopic cylinder is fixedly provided at one end of the guide rail near the movable slide, and the movable end of the telescopic cylinder is connected to the movable slide.
[0011] The extension and retraction of the telescopic cylinder drives the movable slide to move on the guide rail, thereby adjusting the distance between the movable slide and the fixed slide to control the extension of the telescopic black curtain.
[0012] Furthermore, the telescopic rod is composed of multiple sets of intersecting rods, and adjacent rods are rotatably connected.
[0013] Furthermore, a groove is provided on one side of the upper end face of the fixing strip, and one end of the telescopic rod is slidably disposed in the groove via a rotating shaft.
[0014] Furthermore, the drive winding mechanism is a drive motor, which is mounted on the blackout curtain roll, and its output end is connected to one end of the roll shaft.
[0015] When the telescopic black curtain retracts or extends, the drive motor and telescopic cylinder need to work simultaneously to ensure the effective extension and retraction of the curtain.
[0016] Furthermore, the drive winding mechanism is a spiral spring, one end of which is fixedly connected to the roller, and the other end is fixedly connected to the inner wall of the blackout curtain roll.
[0017] When the telescopic rod extends the telescopic curtain, the spiral spring is in an elastic deformation state, which is specifically manifested as coiling (contracting) to store energy;
[0018] When the telescopic rod causes the telescopic curtain to retract, the spiral spring is in an elastic deformation recovery state, which is specifically manifested as relaxation (unfolding) and energy release.
[0019] Furthermore, the horizontally retractable black curtain component and the vertically retractable black curtain component are not at the same horizontal height, ensuring that the expansion and contraction of the horizontally and vertically retractable black curtains will not interfere with each other.
[0020] Compared with the prior art, this application has the following main advantages:
[0021] This application integrates a retractable black screen component on both the length and width sides of the backlight module, supporting horizontal and vertical adjustment of the size of the black screen. This achieves a perfect match between the effective light-emitting area of the backlight and the size of the panel under test, and reduces the relative displacement between the effective light-emitting area and the panel under test during test movement. In addition, the backlight structure designed in this way can be reused on panels of various sizes, which reduces the testing and verification costs to a certain extent. Attached Figure Description
[0022] To more clearly illustrate the solution of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0023] Figure 1 A bottom view of the structure of an adjustable LTPS liquid crystal backlight effective light-emitting area;
[0024] Figure 2 A three-dimensional view of the structure of an adjustable LTPS liquid crystal backlight effective light-emitting area;
[0025] Figure 3 A top view of the structure of an adjustable LTPS liquid crystal backlight effective light-emitting area;
[0026] Figure 4 A schematic diagram of a horizontally retractable black screen assembly with an adjustable effective light-emitting area for LTPS liquid crystal backlighting;
[0027] Figure 5 A cross-sectional view of a light-shielding black curtain roll with an adjustable effective light-emitting area for LTPS liquid crystal backlight;
[0028] Reference numerals: 1. Horizontally retractable black curtain assembly; 2. Horizontally retractable black curtain assembly; 3. Panel under test;
[0029] 101. Blackout curtain roll; 102. Drive winding mechanism; 103. Telescopic blackout curtain; 104. Guide rail; 105. Fixed slide; 106. Moving slide; 107. Telescopic cylinder; 108. Telescopic rod; 109. Fixing strip;
[0030] 1011, spool; 1012, through hole; 1091, groove. Detailed Implementation
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.
[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0033] This application provides a structure for an adjustable LTPS liquid crystal backlight effective light-emitting area, including a horizontally retractable black screen assembly 1 and a vertically retractable black screen assembly 2; the horizontally retractable black screen assembly 1 and the vertically retractable black screen assembly 2 are disposed on adjacent length and width sides of the backlight, and are vertically arranged between the two.
[0034] The horizontally retractable black curtain assembly 1 and the vertically retractable black curtain assembly 2 have the same structure, both including a black curtain roll 101 and a retractable black curtain 103. The black curtain roll 101 has a roller 1011 inside, and the two ends of the roller 1011 are rotatably connected to the two end walls of the black curtain roll 101. One end of the retractable black curtain 103 is wound around the roller 1011, and the other end is led out through the through hole 1012 on the black curtain roll 101. The black curtain roll 101 has a drive winding mechanism 102 outside, which is connected to one end of the roller 1011 and is used to wind up the retractable black curtain 103. The black curtain roll 101 also has a drive extension mechanism on the outside to drive the retractable black curtain 103 to extend.
[0035] By integrating a retractable black screen component on both the length and width sides of the backlight into the backlight module, the size of the black screen can be adjusted horizontally and vertically, achieving a perfect match between the effective light-emitting area of the backlight and the size of the panel under test. This also reduces the relative displacement between the effective light-emitting area and the panel under test during test movement. Furthermore, the backlight structure designed in this way can be reused on panels of various sizes, which reduces the testing and verification costs to a certain extent.
[0036] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
[0037] Embodiment 1 of this application: The structure of the effective light-emitting area of the LTPS liquid crystal backlight is adjustable.
[0038] The structure of the effective light-emitting area of the LTPS liquid crystal backlight in this application includes a horizontally retractable black screen assembly 1 and a vertically retractable black screen assembly 2; the horizontally retractable black screen assembly 1 and the vertically retractable black screen assembly 2 are arranged on adjacent length and width sides of the backlight, and the two are arranged vertically between each other.
[0039] The horizontally retractable black curtain component 1 and the vertically retractable black curtain component 2 are not at the same horizontal height, ensuring that the retraction of the horizontally retractable black curtain 103 and the vertically retractable black curtain 103 will not interfere with each other.
[0040] The horizontally retractable black curtain assembly 1 and the vertically retractable black curtain assembly 2 have the same structure, both including a black curtain roll 101 and a retractable black curtain 103. The black curtain roll 101 has a roller 1011 inside, and the two ends of the roller 1011 are rotatably connected to the two end walls of the black curtain roll 101. One end of the retractable black curtain 103 is wound around the roller 1011, and the other end is led out through the through hole 1012 on the black curtain roll 101. The black curtain roll 101 has a drive winding mechanism 102 outside, which is connected to one end of the roller 1011 and is used to wind up the retractable black curtain 103. The black curtain roll 101 also has a drive extension mechanism on the outside to drive the retractable black curtain 103 to extend.
[0041] The drive extension mechanism includes a guide rail 104 disposed on the same side as the through hole 1012. The guide rail 104 is provided with a fixed slide 105 and a movable slide 106. The fixed slide 105 is fixed to the guide rail 104 by bolts, and the movable slide 106 is slidably disposed between the guide rail 104 and the guide rail 104.
[0042] The outer end of the telescopic black curtain 103 is provided with a fixing strip 109, and the lower end faces of the fixed slide 105 and the movable slide 106 are connected to the fixing strip 109 through the telescopic rod 108.
[0043] The telescopic rod 108 is composed of multiple sets of intersecting rods, and adjacent rods are rotatably connected. A groove 1091 is provided on one side of the upper end face of the fixing strip 109, and one end of the telescopic rod 108 is slidably disposed in the groove 1091 via a pivot.
[0044] A telescopic cylinder 107 is fixedly provided at one end of the guide rail 104 near the movable slide 106, and the movable end of the telescopic cylinder 107 is connected to the movable slide 106.
[0045] The extension and retraction of the telescopic cylinder 107 drives the movable slide 106 to move on the guide rail 104, thereby adjusting the distance between the movable slide 106 and the fixed slide 105, and thus controlling the extension of the telescopic black curtain 103.
[0046] During backlight testing, the panel under test 3 is placed on one side relative to the horizontally retractable black curtain assembly 1 and the vertically retractable black curtain assembly 2, at a distance from the edge of the effective backlight emitting area and the panel under test 3. The retractable black curtain 103 in the horizontally retractable black curtain assembly 1 and the vertically retractable black curtain assembly 2 is extended to achieve a perfect match between the effective backlight emitting area and the size of the panel under test 3, and to reduce the relative displacement between the effective emitting area and the panel under test 3 during test movement.
[0047] Embodiment 2 of this application: The structure of the effective light-emitting area of the LTPS liquid crystal backlight can be adjusted.
[0048] The structure of the adjustable LTPS liquid crystal backlight effective light-emitting area is further improved. The drive winding mechanism 102 is a drive motor, which is installed on the light-shielding black curtain roll 101, and its output end is connected to one end of the roll 1011.
[0049] When the telescopic black curtain 103 is retracted or extended, the drive motor and the telescopic cylinder 107 need to work simultaneously to ensure the effective extension and retraction of the telescopic black curtain 103.
[0050] Embodiment 3 of this application: The structure of the effective light-emitting area of the LTPS liquid crystal backlight can be adjusted.
[0051] Furthermore, the structure of the adjustable LTPS liquid crystal backlight effective light-emitting area is further improved. The driving winding mechanism 102 is a spiral spring, one end of which is fixedly connected to the roller 1011, and the other end is fixedly connected to the inner wall of the light-blocking black curtain roller 101.
[0052] When the telescopic rod 108 drives the telescopic black curtain 103 to extend, the spiral spring is in an elastic deformation state, which is specifically manifested as coiling (contraction) to store energy.
[0053] When the telescopic rod 108 causes the telescopic black curtain 103 to retract, the spiral spring is in an elastic deformation recovery state, which is specifically manifested as relaxation (unfolding) and energy release.
[0054] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.
Claims
1. A structure for adjusting the effective light emitting area of an LTPS liquid crystal backlight, characterized in that, It includes a horizontally retractable black screen assembly (1) and a vertically retractable black screen assembly (2); the horizontally retractable black screen assembly (1) and the vertically retractable black screen assembly (2) are arranged on adjacent length and width sides of the backlight, and the two are arranged perpendicularly to each other; The horizontally retractable black curtain assembly (1) and the vertically retractable black curtain assembly (2) have the same structure, both including a black curtain roll (101) and a retractable black curtain (103). The black curtain roll (101) has a roller (1011) inside. The two ends of the roller (1011) are rotatably connected to the two end walls of the black curtain roll (101). One end of the retractable black curtain (103) is wound around the roller (1011), and the other end is led out through the through hole (1012) on the black curtain roll (101). The light-blocking black curtain roll (101) is provided with a drive winding mechanism (102) on the outside. The drive winding mechanism (102) is connected to one end of the roll (1011) and is used to wind up the telescopic black curtain (103). The light-blocking black curtain roll (101) is provided with a drive extension mechanism on the outside to drive the telescopic black curtain (103) to extend.
2. The structure of claim 1, wherein the effective light emitting area of the LTPS liquid crystal backlight is adjustable. The drive extension mechanism includes a guide rail (104) disposed on the same side of the through hole (1012). The guide rail (104) is provided with a fixed slide (105) and a movable slide (106). The fixed slide (105) is fixed to the guide rail (104) by bolts, and the movable slide (106) is slidably disposed between the guide rail (104). The outer end of the telescopic black curtain (103) is provided with a fixing strip (109), and the lower end faces of the fixed slide (105) and the movable slide (106) are connected to the fixing strip (109) through a telescopic rod (108).
3. The structure of claim 2, wherein the effective light emitting area of the LTPS liquid crystal backlight is adjustable. A telescopic cylinder (107) is fixedly provided at one end of the guide rail (104) near the movable slide (106), and the movable end of the telescopic cylinder (107) is connected to the movable slide (106).
4. The structure of claim 2, wherein the effective light emitting area of the LTPS liquid crystal backlight is adjustable. The telescopic rod (108) is composed of multiple sets of intersecting rods, and adjacent rods are rotatably connected.
5. The structure of claim 4, wherein the effective light emitting area of the LTPS liquid crystal backlight is adjustable. The upper end face of the fixing bar (109) is provided with a groove (1091), and one end of the telescopic rod (108) is slidably disposed in the groove (1091) through a rotating shaft.
6. The structure for adjustable LTPS liquid crystal backlight effective light emitting area according to claim 1, wherein, The drive winding mechanism (102) is a drive motor, which is installed on the blackout curtain roll (101), and its output end is connected to one end of the roll (1011).
7. The structure for adjustable LTPS liquid crystal backlight effective light emitting area according to claim 1, wherein, The drive winding mechanism (102) is a spiral spring, one end of which is fixedly connected to the roller (1011), and the other end is fixedly connected to the inner wall of the blackout curtain roller (101).
8. The structure for adjustable LTPS liquid crystal backlight effective light emitting area according to claim 1, wherein, The horizontally retractable black curtain component (1) and the vertically retractable black curtain component (2) are not at the same horizontal height.