Ultrahigh-brightness dynamic backlight assembly of 32-inch liquid crystal screen
By designing ultra-high brightness dynamic backlight components in the LCD screen, using a backlight module and independently controlled blue light beads, the problem of insufficient brightness adjustment capabilities of conventional LCD screens is solved, and high accuracy and wide range of local brightness adjustment are achieved.
Patent Information
- Application Number
- CN202421571371.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The brightness adjustment ability of conventional LCD screens is limited, and local brightness adjustment cannot be achieved, resulting in monotonous screen brightness adjustment.
A 32-inch LCD screen ultra-high brightness dynamic backlight component is designed, using a combined structure of a backlight module, a light processing membrane component, a liquid crystal panel and a quarter-wave plate. By independently controlling the brightness of each blue light bead, local brightness adjustment is achieved.
It realizes brightness adjustment in the local range of the entire screen, with higher accuracy and wider range, avoiding the problem of excessive light in some areas.
Smart Images
Figure CN222690024U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid crystal screens, and in particular to an ultra-bright dynamic backlight component for a 32-inch liquid crystal screen. Background Art
[0002] Conventional LCD screen backlight system, backlight brightness adjustment and signal control are very simple. The control of lamp beads is divided into switch signal (ON / OFF) and brightness control signal (ADJ / PWM). The ON / OFF signal is provided by the main control driver board unit with high level (2.7-5V) / low level to control the opening or closing of the LED drive voltage. The ADJ / PWM signal is used to adjust the brightness of the lamp beads of the LED light bar array by adjusting the output current of the constant current module.
[0003] Due to the limitation of the control method, the brightness adjustment of conventional LCD screens is very monotonous, and can only achieve simple uniform changes of the screen, but cannot achieve local adjustment of the entire screen. For this reason, we propose a 32-inch LCD screen ultra-bright dynamic backlight component. Utility Model Content
[0004] In order to solve the technical problems existing in the above-mentioned prior art, the utility model provides an ultra-bright dynamic backlight component for a 32-inch liquid crystal screen.
[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: an ultra-bright dynamic backlight assembly for an inch LCD screen, comprising a module shell and a module panel connected to the module shell to form a basic shell, wherein a plurality of groups of cross-flow fans for heat dissipation are arranged inside the module shell, a control module and a power supply module are arranged in parallel at the middle position inside the module shell, a module middle frame is arranged inside the module shell, a backlight module, a light processing film assembly, a liquid crystal panel, a quarter wave plate and a module face frame are stacked in sequence inside the module middle frame, and the module face frame fixes the backlight module, the light processing film assembly, the liquid crystal panel and the quarter wave plate in the module middle frame in an extruded manner.
[0006] Preferably, the control module includes a backlight control module and a liquid crystal drive unit, the backlight control module is electrically connected to the backlight module, and the liquid crystal drive unit is electrically connected to the liquid crystal panel.
[0007] Preferably, the power supply module includes an industrial power supply and a DC power supply, the industrial power supply and the DC power supply are arranged in parallel, the industrial power supply and the DC power supply are connected to provide AC power input for the DC power supply, the DC power supply is electrically connected to the cross-flow fan, the backlight control module, the liquid crystal drive unit, the backlight module and the liquid crystal panel, respectively, and the DC power supply provides DC power to the cross-flow fan, the backlight control module, the liquid crystal drive unit, the backlight module and the liquid crystal panel.
[0008] Preferably, the module middle frame is sleeved on the top opening inside the module outer shell, and the module middle frame cooperates with the module panel to form a closed chamber inside the module outer shell. The cross-flow fan discharges the hot air in the chamber to generate negative pressure in the chamber, and external cold air enters the chamber under the action of negative pressure.
[0009] Preferably, a transverse partition is provided in the middle of the module middle frame, and the light processing film assembly, the liquid crystal panel and the quarter wave plate are all arranged above the transverse partition inside the module middle frame.
[0010] Preferably, the backlight module is arranged below the internal partition of the module middle frame, and the backlight module comprises a lamp bead array board and a lampshade array board, the lamp bead array board is composed of blue light lamp beads, and the lampshade array board is arranged above the lamp bead array board.
[0011] Preferably, the lamp bead array board is divided in a 16:9 aspect ratio, and includes 2304 independent blue light lamp beads, each of which covers a 30×30 square area.
[0012] Preferably, the lampshade array plate is composed of a plurality of groups of conical lampshades, each group of the lampshades is made of pure white opaque material, and each group of the lampshades corresponds to a blue light bead;
[0013] Preferably, the light processing film assembly comprises a quantum dot film, a BF brightness enhancement film, a BDEF brightness enhancement film and a diffusion film, and the quantum dot film, the BF brightness enhancement film, the BDEF brightness enhancement film and the diffusion film are stacked and adhered to each other.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] 1. The utility model is provided with a backlight module, which includes a lamp bead array board and a lampshade array board. The lamp bead array board is divided in a 16:9 aspect ratio. The lamp bead array board includes 64×36, a total of 2304 independent blue light beads. Each blue light bead covers a 30×30 square area. A single blue light bead is used as a light-emitting partition, which can realize the adjustment of the local range in the entire screen;
[0016] 2. In the utility model, each blue light lamp bead adopts the method of three chips in series, that is, three chips are packaged in one inside the same lamp bead. The blue light lamp bead needs a smaller current to maintain the same power. After the three chips are connected in series, it is easier to control the brightness of the lamp bead by raising and lowering the voltage, and the adjustment accuracy is higher and the adjustment range is wider.
[0017] 3. In the utility model, the lampshade array plate is composed of a plurality of groups of conical lampshades, each group of lampshades corresponds to a blue light lamp bead, and the light emitted by each group of blue light lamp beads is converged by the lampshade during the scattering process, thereby ensuring the consistency of the light when it is emitted, and also avoiding the light emission and the light of other blue light lamp beads overlapping, resulting in excessive light in some areas. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0019] Figure 2 It is a schematic diagram of the three-dimensional unfolded structure of the utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the lampshade array plate of the utility model;
[0021] Figure 4 This is a schematic diagram of the lampshade structure of the utility model.
[0022] The numbers in the figure represent:
[0023] 1. Module housing; 2. Module panel; 3. Crossflow fan; 4. Backlight control module; 5. LCD drive unit; 6. Power module; 61. Industrial power supply; 62. DC power supply; 7. Module middle frame; 8. Backlight module; 81. Lamp bead array board; 82. Lamp cover array board; 821. Lamp cover; 9. Light processing film assembly; 91. Quantum dot film; 92. BF brightening film; 93. BDEF brightening film; 94. Diffusion film; 10. LCD panel; 11. Quarter wave plate; 12. Module face frame. DETAILED DESCRIPTION
[0024] The above and other technical features and advantages of the utility model are further described below in conjunction with the accompanying drawings and embodiments. However, the following embodiments are only preferred embodiments of the utility model, not all of them.
[0025] Example:
[0026] like Figure 1-Figure 4As shown, the utility model provides an ultra-bright dynamic backlight component for a 32-inch LCD screen, including a module shell 1 and a module panel 2 connected to the module shell 1 to form a basic shell, a plurality of groups of cross-flow fans 3 for heat dissipation are arranged inside the module shell 1, a control module and a power supply module 6 are arranged in parallel at the middle position inside the module shell 1, a module middle frame 7 is arranged inside the module shell 1, a backlight module 8, a light processing film assembly 9, a liquid crystal panel 10, a quarter wave plate 11 and a module face frame 12 are stacked in sequence inside the module middle frame 7, and the module face frame 12 fixes the backlight module 8, the light processing film assembly 9, the liquid crystal panel 10 and the quarter wave plate 11 in the module middle frame 7 in an extruded manner.
[0027] The control module includes a backlight control module 4 and a liquid crystal drive unit 5. The backlight control module 4 is electrically connected to the backlight module 8. The liquid crystal drive unit 5 is electrically connected to the liquid crystal panel 10. The backlight control module 4 and the liquid crystal drive unit 5 are configured to control the backlight module 8 and the liquid crystal panel 10 respectively.
[0028] The power supply module 6 includes an industrial power supply 61 and a DC power supply 62. The industrial power supply 61 and the DC power supply 62 are arranged in parallel. The industrial power supply 61 and the DC power supply 62 are connected to provide AC power input for the DC power supply 62. The DC power supply 62 is electrically connected to the cross-flow fan 3, the backlight control module 4, the liquid crystal drive unit 5, the backlight module 8 and the liquid crystal panel 10 respectively. The DC power supply 62 provides DC power to the cross-flow fan 3, the backlight control module 4, the liquid crystal drive unit 5, the backlight module 8 and the liquid crystal panel 10.
[0029] The module middle frame 7 is mounted on the top opening of the module outer shell 1. The module middle frame 7 cooperates with the module panel 2 to form a closed chamber inside the module outer shell 1. The cross-flow fan 3 discharges the hot air in the chamber to generate negative pressure in the chamber. External cold air enters the chamber under the action of negative pressure. Through the circulation of air, the heat accumulated in the chamber is sent out, so that the inside of the chamber is kept in a lower temperature range to ensure the normal operation of the equipment.
[0030] A transverse partition is arranged in the middle of the module middle frame 7, and the light processing film assembly 9, the liquid crystal panel 10 and the quarter wave plate 11 are all arranged above the transverse partition inside the module middle frame 7. The module middle frame 7 separates the backlight module 8 from the light processing film assembly 9, the liquid crystal panel 10 and the quarter wave plate 11. The layered fixing method has better connection stability. At the same time, the indirect connection method can generate an air layer between the backlight module 8 and the light processing film assembly 9. The air layer reduces the upward transfer of heat generated when the backlight module 8 is working.
[0031] The backlight module 8 is arranged below the internal partition of the module middle frame 7. The backlight module 8 includes a lamp bead array board 81 and a lampshade array board 82. The lamp bead array board 81 is composed of blue light lamp beads. The lamp bead array board 81 is divided according to the aspect ratio of 16:9. The lamp bead array board 81 includes 64×36, a total of 2304 independent blue light lamp beads. Each blue light lamp bead covers a square area of 30×30. A single blue light lamp bead is used as a light-emitting partition. Compared with the method of controlling multiple lamp beads as a partition, the independent control method of each blue light lamp bead has more obvious directionality of a single lamp bead, which reduces the influence of multiple lamp bead partitions emitting light at the same time on the side partitions.
[0032] Each blue light lamp bead adopts the method of three chips in series connection, that is, three chips are integrated into the same lamp bead. The voltage of a single lamp chip is 3.0-3.2V. After the three chips are connected in series, the voltage of each blue light lamp bead is increased to 9-9.6V. Compared with the conventional single-chip lamp bead, the blue light lamp bead requires less current to maintain the same power. In addition, after the three chips are connected in series, it is easier to control the brightness of the lamp bead by raising and lowering the voltage, with higher adjustment accuracy and wider adjustment range.
[0033] The lampshade array plate 82 is arranged above the lamp bead array plate 81. The lampshade array plate 82 is composed of a plurality of groups of conical lampshades 821. Each group of lampshades 821 corresponds to a blue light bead. The light emitted by each group of blue light bead is converged by the lampshade 821 during the scattering process. Finally, the converged light is emitted in a horizontal manner, which ensures the consistency of the light when it is emitted. At the same time, it also avoids the light emission and the light of other blue light beads overlapping, resulting in excessive light in some areas.
[0034] The light processing film assembly 9 includes a quantum dot film 91, a BF brightening film 92, a BDEF brightening film 93 and a diffusion film 94. The quantum dot film 91, the BF brightening film 92, the BDEF brightening film 93 and the diffusion film 94 are stacked and adhered to each other. The quantum dot film 91 can convert the light emitted by the blue light beads into white light with a color temperature of about 6000K, thereby obtaining full-spectrum light.
[0035] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences can be made within the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.
Claims
1. A 32-inch LCD screen ultra-bright dynamic backlight assembly, comprising a module housing and a module panel connected to the module housing to form a basic housing, characterized in that: A plurality of cross-flow fans for heat dissipation are arranged inside the module shell, a control module and a power supply module are arranged side by side at the middle position inside the module shell, a module middle frame is arranged inside the module shell, a backlight module, a light processing film assembly, a liquid crystal panel, a quarter wave plate and a module face frame are stacked in sequence inside the module middle frame, and the module face frame fixes the backlight module, the light processing film assembly, the liquid crystal panel and the quarter wave plate in the module middle frame by extrusion.
2. A 32-inch LCD screen ultra-bright dynamic backlight assembly as claimed in claim 1, characterized in that: The control module includes a backlight control module and a liquid crystal drive unit. The backlight control module is electrically connected to the backlight module, and the liquid crystal drive unit is electrically connected to the liquid crystal panel.
3. A 32-inch LCD screen ultra-bright dynamic backlight assembly as claimed in claim 1, characterized in that: The power supply module includes an industrial power supply and a DC power supply. The industrial power supply and the DC power supply are arranged in parallel. The industrial power supply and the DC power supply are connected to provide AC power input for the DC power supply. The DC power supply is electrically connected to the cross-flow fan, the backlight control module, the liquid crystal drive unit, the backlight module and the liquid crystal panel respectively. The DC power supply provides DC power for the cross-flow fan, the backlight control module, the liquid crystal drive unit, the backlight module and the liquid crystal panel.
4. A 32-inch LCD screen ultra-bright dynamic backlight assembly as claimed in claim 1, characterized in that: The module middle frame is sleeved on the top opening inside the module shell. The module middle frame cooperates with the module panel to form a closed chamber inside the module shell. The cross-flow fan discharges the hot air in the chamber to generate negative pressure in the chamber, and external cold air enters the chamber under the action of negative pressure.
5. A 32-inch LCD screen ultra-bright dynamic backlight assembly as claimed in claim 1, characterized in that: A transverse partition is arranged in the middle of the module middle frame, and the light processing film assembly, the liquid crystal panel and the quarter wave plate are all arranged above the transverse partition inside the module middle frame.
6. A 32-inch liquid crystal screen ultra-bright dynamic backlight assembly as claimed in claim 1, characterized in that: The backlight module is arranged below the internal partition of the module middle frame, and comprises a lamp bead array board and a lamp cover array board, wherein the lamp bead array board is composed of blue light lamp beads, and the lamp cover array board is arranged above the lamp bead array board.
7. A 32-inch liquid crystal screen ultra-bright dynamic backlight assembly as claimed in claim 6, characterized in that: The lamp bead array board is divided into a length-to-width ratio of 16:9, and the lamp bead array board includes 2304 independent blue light lamp beads, each of which covers a square area of 30×30.
8. A 32-inch liquid crystal screen ultra-bright dynamic backlight assembly as claimed in claim 6, characterized in that: The lampshade array plate is composed of a plurality of groups of conical lampshades, each group of the lampshades is made of pure white opaque material, and each group of the lampshades corresponds to a blue light bead.
9. A 32-inch LCD screen ultra-bright dynamic backlight assembly as claimed in claim 1, characterized in that: The light processing film assembly comprises a quantum dot film, a BF brightness enhancement film, a BDEF brightness enhancement film and a diffusion film, wherein the quantum dot film, the BF brightness enhancement film, the BDEF brightness enhancement film and the diffusion film are stacked and adhered to each other.