LCD Module Reinforcing Rib for Bone Conduction Sound
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Solution Overview
Problem
Conventional liquid crystal display (LCD) modules experience significant energy loss and tone changes when attempting to use bone conduction technology for sound wave transmission, as the vibration exciter cannot be directly attached to the back of an LCD screen without causing energy loss and timbre changes, unlike OLED screens.
Innovation Solution
A liquid crystal display module design featuring a reinforcing rib on the backlight module acting as a sound wave conducting channel, with a vibration exciter attached to this rib, and an audio processing module connected to drive the vibration exciter, ensuring efficient sound wave transmission without energy loss or tone changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a vibration exciter is attached directly to the back of an LCD screen, then bone conduction sound wave transmission can be achieved, but energy loss and tone changes occur
Solution Approach 1:
The patent introduces a backlight module as an intermediary component between the vibration exciter and the LCD panel. The vibration exciter is attached to the backlight module rather than directly to the LCD panel, allowing vibration energy to be transmitted through the backlight module's light guide plate which acts as a mediator. This resolves the contradiction by enabling bone conduction functionality while preventing direct contact that causes energy loss and tone changes.
2Ease of operation
If a vibration exciter is attached directly to the back of an LCD screen, then bone conduction sound wave transmission can be achieved, but tone changes occur
Solution Approach 1:
The backlight module serves as a mediator that preserves the original tone characteristics of the vibration exciter. By transmitting vibrations through the light guide plate and other backlight components rather than directly through the LCD panel, the system maintains accurate tone reproduction while still enabling bone conduction sound transmission.
3Reliability
If the LCD module structure is modified to accommodate vibration exciter attachment, then sound wave transmission capability is improved, but device complexity increases
Solution Approach 1:
The patent leverages the existing backlight module structure to serve dual functions: light transmission and vibration transmission. The light guide plate and other backlight components are utilized as vibration conduction pathways, eliminating the need for separate vibration transmission structures. This multi-functional approach improves sound wave transmission capability while avoiding additional structural complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design prevents tone changes and volume loss, enabling effective sound wave transmission in LCD modules, thus enhancing the sound quality and reducing power consumption in full-screen electronic devices.
Implementation Method 1
a vibration exciter attached to the reinforcing rib for generating vibration energy
Implementation Method 2
a reinforcing rib functioning as a sound wave conducting channel
Data Source
AI summary
A liquid crystal display (LCD) module, a liquid crystal display device, and an electronic device are disclosed. The LCD module includes a backlight module and an LCD panel. The LCD panel includes an upper substrate and a lower substrate disposed opposite to the upper substrate, and a liquid crystal unit filled between the upper substrate and the lower substrate. A reinforcing rib functioning as a sound wave conducting channel is disposed on a side of the backlight module facing away from the LCD panel. A vibration exciter is attached to the reinforcing rib for generating vibration energy.