PATENT CLAIM ANALYSIS

Application Number: 15952471
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2019-10
Patent Classification: ["345", "087000"]

Abstract:
A liquid crystal writing device includes a dispersion of cholesteric liquid crystal and polymer; a flexible substrate on which a user applies pressure that changes a texture of the cholesteric liquid crystal to form an image; electrically conductive layers between which the dispersion is disposed; and electronics adapted to apply an erase voltage waveform across the electrically conductive layers that forms a focal conic texture and erases the image. The erase voltage waveform includes: i) an erase portion at an erase voltage VE, the erase voltage VE being at least as high as a planar to homeotropic transition start voltage (VPH 0 ) of the cholesteric liquid crystal, and ii) a slow discharge portion that lasts for a time t d  that is at least 10 ms.

Claim (Index 18):
A cholesteric liquid crystal eWriter that forms an image by applying pressure to a writing/drawing surface comprising a liquid crystal layer including a dispersion of cholesteric liquid crystal material and polymer, and electrically conductive layers between which said liquid crystal layer is disposed, wherein electronics of said eWriter are adapted to apply an erase voltage waveform across said electrically conductive layers that forms a focal conic texture and erases the image, said erase voltage waveform including an erase portion and a slow discharge portion, said electronics comprising:\n a regulated power source or a battery having a voltage VDD; a controller including a voltage VDD input, a switch SW input, an enable EN output, a boost BST output, a feedback FB input and an optional discharge DCHG output; a transistor Q 3  acting as a switch controlled by an enable signal from said enable EN output of said controller; a boost converter circuit including: a transistor Q 1  acting as a switch controlled by a boost signal from said BST output of said controller, a diode, an inductor located between said switch Q 3  and said diode, and a capacitor C 1  in parallel with said writing/drawing surface; said boost converter circuit including a feedback circuit configured to provide feedback to said FB input of said controller based on a boost converter output voltage from said boost converter circuit; a discharge circuit optionally under control of a discharge signal from said DCHG output of said controller; wherein in response to a control signal instructing erase of the image applied to said switch SW input, said controller turns on said transistor Q 3  applying said voltage VDD to said boost converter circuit, said feedback circuit indicates to said controller via said feedback FB input when said boost converter output voltage is below a set level, resulting in said controller enabling said signal from said output BST that turns on said transistor Q 1  and causes energy to be stored in said inductor, wherein when said controller subsequently turns off said transistor Q 1 , said energy stored in said inductor is discharged through said diode increasing said erase voltage on said capacitor C 1  and increasing said erase voltage in said parallel writing/drawing surface forming said erase portion of said erase voltage waveform, and said discharge circuit produces said slow discharge portion of said erase voltage waveform.

Metadata:
- Claim Count in Document: 32.0
- Percentile: 91.0
- Lexical Diversity: 1.84
- Patent Class: 345.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14971094', '13975692', '12220805', '15160767', '14678482']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6620157314635519
- 35 USC 102 Novelty (BERT): 0.4910017216177069
- Combined Prediction Score: 0.6449143304789673
- Mean Citation Score: 233.167504
- Max Citation Score: 260.55658
- Similarity Product: 216.20325220604064

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test