Electrophoretic Display Device with Switchable Transparent Substrate

The patent removes traditional light-blocking components such as reflective plates and complex light-emitting structures from the display device. By extracting these unnecessary components, the design achieves higher luminance through a simpler structure that relies on the light-emitting element's inherent brightness rather than additional optical components.

Instead of adding components to block light and enhance luminance through reflection or transmission, the patent inverts the approach by using a transparent substrate with light-emitting elements that directly emit light without requiring intermediate light-blocking and reflective components. This inversion of the traditional approach eliminates the need for complex optical path management.

The patent extracts and removes traditional light-blocking components such as reflective plates and complex optical structures from the display device. By eliminating these components that cause light blocking, the display achieves higher brightness through a simpler structure that allows light to pass through transparent substrates without being blocked or reflected.

The patent employs transparent substrates and light-emitting elements that emit light in specific colors without requiring additional color-filtering or light-blocking components. The light-emitting elements themselves provide the necessary color output, eliminating the need for separate optical components that would block or modify light paths.

The patent employs switchable transparent materials that can dynamically change their optical properties between transparent and opaque states. This dynamic switching capability allows the display to enhance visibility by transmitting light when needed while also blocking light to provide contrast when required, resolving the contradiction between these two opposing requirements.

The patent utilizes materials whose optical parameters (transparency, opacity) can be changed through external control mechanisms. By changing the optical parameters of the substrate or light-emitting elements, the display can switch between high-visibility modes (transparent state) and high-contrast modes (opaque state), simultaneously satisfying both requirements.