Display Device Switching Color and Transmitted Light Modes
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Solution Overview
Problem
Conventional display devices lack the capability to realize diverse image display modes, particularly eye-catching displays, and do not efficiently switch between color and transmitted light image display modes.
Innovation Solution
A display device comprising a light source, a light guide plate, a display panel, and control units that manage light transmittance for each pixel, allowing the light source to be turned on or off based on image data, enabling color or transmitted light image display modes by controlling light passage through the light guide plate's emission and back surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source is turned on to display color images, then color display performance is improved, but the ability to display transmitted light images is lost
Solution Approach 1:
The patent implements dynamic switching between two display modes by controlling the light source state. The display device can transition between color display mode (light source ON) and transmitted light image mode (light source OFF) based on display requirements, making the system adaptable to different viewing scenarios and content types.
Solution Approach 2:
The display device achieves multi-functionality by utilizing the same hardware components (light guide plate, display panel) to perform two distinct functions: color image display when the light source is active, and transmitted light image display when the light source is inactive. This allows a single device to serve multiple display purposes without requiring separate hardware systems.
2Adaptability or versatility
If the light source is turned off to display transmitted light images, then transmitted light display is enabled, but color display capability is lost
Solution Approach 1:
The system dynamically adjusts its display characteristics by switching the light source state. When transmitted light display is required, the light source is turned off to allow external light to pass through the display panel, creating the transmitted light effect. This dynamic control enables the display to adapt to different environmental lighting conditions and content requirements.
Solution Approach 2:
The same light guide plate and display panel structure serves dual purposes: it guides and emits light for color display when illuminated, and simultaneously functions as a transparent medium for transmitted light display when unilluminated. This universal design eliminates the need for separate hardware configurations for different display modes.
3Reliability
If conventional backlight control is used, then basic display performance is improved, but diverse image display modes cannot be realized
Solution Approach 1:
The patent extends basic backlight control functionality to achieve multiple display modes. By controlling the light source switching mechanism, the system can perform not only standard color display but also transmitted light image display, thereby making the basic display components serve multiple functions and increasing overall system versatility.
Solution Approach 2:
The display system transitions from static backlight control to dynamic mode switching. The light source can be selectively activated or deactivated based on the desired display mode, enabling the system to adapt between color display and transmitted light display scenarios while maintaining reliable performance in both modes.
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
The solution allows for diverse image display modes, including eye-catching displays, by switching between color and transmitted light image modes using the same image data, enhancing the display's versatility and visual impact.
Implementation Method 1
a light guide plate having an incidence surface on which light from the light source is incident, and an emission surface from which the light from the light source, incident via the incidence surface, is emitted
Implementation Method 2
a display panel stacked on the emission surface of the light guide plate, the display panel displaying an image by controlling a transmittance of light incident thereon for each of a plurality of pixels
Data Source
AI summary
A display device (10) includes a light source (19), a light guide plate (18), a display panel (11), a panel driving unit that outputs, to the display panel (11), a signal for controlling a transmittance of each pixel of the display panel (11), and a light source driving unit (16). Light can pass through a back surface of the light guide plate (18), which is a surface opposed to the emission surface of the light guide plate (18). The light source driving unit (16) drives the light source (19) based on the lighting control data. In a case where an image is displayed when the light source (19) is in ON state, the display panel (11) displays a color image, by controlling, pixel by pixel, a transmittance of light that passes from the light source (19) through the emission surface of the light guide plate. In a case where an image is displayed when the light source (19) is in OFF state, the display panel (11) displays a transmitted light image that includes a transmitting region through which the back of the display device (10) can be seen, by controlling, pixel by pixel, a transmittance of light that passes through the back surface of the light guide plate (18) and is incident on the display panel (11).