Double-Sided Display With Inverted Back Drive Circuit
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Solution Overview
Problem
Double-sided displays face the challenge of displaying images on both sides of a panel without incurring left-right reversal issues, which affects the clarity and usability of the display.
Innovation Solution
The implementation of a double-sided display system where subpixels have both a first light-emitting part for front emission and a second light-emitting part for back emission, sharing data and gate lines, and driven simultaneously or alternately to prevent image reversal, utilizing a data driver and gate driver system to manage pixel data signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common drive circuit is used to drive both front and back pixel arrays, then the drive circuit complexity is reduced, but left-right reversed image is output on one of the sides
Solution Approach 1:
The pixel arrays are divided into front and back sides with separate drive circuits. The front pixel array is driven by a front drive circuit while the back pixel array is driven by a back drive circuit, allowing independent control of each side to prevent image reversal while maintaining manageable circuit complexity through modular segmentation
Solution Approach 2:
The back drive circuit inverts the image signal before driving the back pixel array. By applying an inverted image signal to the back side, the reflection off the back surface produces a correctly oriented image, counteracting the natural reversal that would occur with direct signaling
2Manufacturing precision
If separate drive circuits are used for front and back pixel arrays, then left-right reversed image is prevented, but the drive circuit complexity increases
Solution Approach 1:
The front and back drive circuits are integrated into a unified drive system with coordinated control. The drive circuits share common control signals and timing mechanisms, merging their operations to reduce overall system complexity while maintaining the separate signaling paths needed to prevent image reversal
Solution Approach 2:
The drive circuits are designed with multi-functional capabilities to handle both front and back pixel array driving. The same drive circuit architecture can switch between driving front pixels, back pixels, or both simultaneously, reducing the need for completely separate dedicated circuits and lowering overall 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 solution enables clear and accurate image display on both sides of the panel without left-right reversal, enhancing the display's functionality and user experience by ensuring proper image orientation on both the front and back sides.
Implementation Method 1
Each subpixel comprises a first light-emitting part that emits light toward the front of the display panel; and a second light-emitting part that emits light toward the back of the display panel
Implementation Method 2
Light emitted from the first light-emitting part is reflected off a first anode and passes through a first cathode
Implementation Method 3
light emitted from the second light-emitting part is reflected off a second cathode and passes through a second anode
Data Source
AI summary
A double-sided display comprises: a first data driver that is connected to one end of the data lines and applies a data signal of a first image to the data lines; and a second data driver that is connected to the other end of the data lines and applies a data signal of a second image to the data lines. The first data driver supplies a first pixel data signal of the first image to a first data line and an nth pixel data signal of the first image to an nth data line, and the second data driver supplies a first pixel data signal of the second image to the nth data line and an nth pixel data signal of the second image to the first data line.