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Circuit and method for fast driving solid-state volumetric true three-dimensional liquid-crystal light valve

A solid volume type, liquid crystal light valve technology, applied to static indicators, instruments, etc., to achieve small on-resistance, reduce switching time, and improve the effect of charging and discharging speed

Inactive Publication Date: 2013-04-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no fast driving circuit and driving method for large-size liquid crystal light valves (such as 32 inches or more) specially used in solid-state volumetric true 3D displays in the industry

Method used

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  • Circuit and method for fast driving solid-state volumetric true three-dimensional liquid-crystal light valve
  • Circuit and method for fast driving solid-state volumetric true three-dimensional liquid-crystal light valve
  • Circuit and method for fast driving solid-state volumetric true three-dimensional liquid-crystal light valve

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0038] Such as figure 1 As shown, the solid-state volume type real three-dimensional liquid crystal light valve fast driving circuit of the present invention includes a first photocoupler OP1, a second photocoupler OP2, a first half-bridge driver U1, a second half-bridge driver U2, and a first switching transistor Q1, the second switching transistor Q2, the third switching transistor Q3, the fourth switching transistor Q4, and the NAND gate NAND1.

[0039] The anode of the first photocoupler OP1 is connected to the current-limiting resistor R1 of the first scanning line Scan1, the cathode is connected to the digital ground terminal DGND, the collector is connected to the +5V power line, and the emitter is connected to the logic input terminal of the first half-bridge dr...

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Abstract

The invention discloses a circuit and method for fast driving a solid-state volumetric true three-dimensional liquid-crystal light valve. The circuit comprises a first photoelectric coupler, a second photoelectric coupler, a first half-bridge driver, a second half-bridge driver, a first switch transistor, a second switch transistor, a third switch transistor, a fourth switch transistor and a NAND gate. The method comprises the positive charging stage, the positive electric-field maintaining stage, the positive discharging stage, the positive zero-electric-field maintaining stage, the negative charging stage, the negative electric-field maintaining stage, the negative discharging stage and the negative zero-electric-field maintaining stage. The liquid-crystal light valve charging and discharging loop has small on-resistance, and the half-bridge drivers are adopted to drive a power MOSFET (metal-oxide semiconductor field effect transistor), thus the switching-on and off time of the MOSFET are shortened, and the charging and discharging speed is decreased. Due to the positive and negative alternative charging and discharging of the liquid-crystal light valve, the disturbance and influence of the unipolar electric field to the circuit system are eliminated, and the service life of the liquid-crystal light valve is prolonged.

Description

technical field [0001] The invention relates to a solid-state volume type true three-dimensional display liquid crystal light valve fast driving technology, in particular to a solid-state volume type true three-dimensional liquid crystal light valve fast driving circuit and a driving method thereof. Background technique [0002] The solid-state volumetric true 3D display is to project the multi-layer sliced ​​images of 3D objects with different depth information onto a group of liquid crystal light valves of corresponding depths sequentially through a high-speed projection device, thereby generating a true physical depth in 3D space. 3D image. The liquid crystal light valve of the solid-state volumetric true three-dimensional display is generally made of PDLC (Polymer Dispersed Liquid Crystal, polymer dispersed liquid crystal) material. In the state of no applied voltage, PDLC presents an opaque scattering state; while driven by an applied voltage, PDLC presents a transpa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
Inventor 方勇朱尧吕国强
Owner HEFEI UNIV OF TECH