High-response-speed liquid crystal inversion control method and system

Abstract

The invention discloses a high-response-speed liquid crystal inversion control method and system, and the method comprises the steps: inputting low voltage in a first direction to a first light valve and a second light valve for 1t, and enabling a liquid crystal molecular layer to be in a natural convolution state; high voltage in the second direction is input into the first light valve for 1 t, so that the liquid crystal molecular layer deflects leftwards, and left-rotation light is generated; high voltage in the first direction is input into the second light valve for 1 t, so that the liquid crystal molecular layer deflects rightwards, and right-handed rotation light is generated. According to the invention, by reducing the low-voltage convolution frequency, the charge aggregation effect caused by continuous voltage output is avoided, the problem of liquid crystal layer breakdown caused by charge aggregation is solved, the service life of the liquid crystal layer is prolonged, and the reliability of the liquid crystal layer is improved.

Description

Technical Field

[0001] The present invention relates to the field of 3D display technology, and in particular to a high-response speed liquid crystal inversion control method and system. Background Art

[0002] The main solution for 3D screen display is to add two additional liquid crystal light valves to the general liquid crystal display, each corresponding to the left and right eye images. The liquid crystal molecules are deflected by voltage applied to the liquid crystal to produce a light phase delay related to the current signal, which converts the linear polarization of the liquid crystal into the required circular polarization with opposite rotations for the left and right eyes. Then, the left and right eye images are separated and transmitted to the human eyes respectively through circular polarization glasses, presenting different binocular images to the left and right eyes, forming a 3D visual effect.

[0003] In the existing liquid crystal arrangement method, voltage is usually applied or removed at both ends of the liquid crystal layer to make the liquid crystal molecules rotate along the electric field lines, thereby achieving the corresponding deflection control effect. Taking one of the liquid crystal methods as an example, in actual use, in the left eye frame, the first light valve applies a high voltage to rotate the liquid crystal to achieve the optical rotation effect, and in the right eye frame, a low voltage is applied to make the liquid crystal molecules rotate naturally without changing the rotation direction. At this time, the second light valve applies a high voltage to achieve the reverse optical rotation effect, forming the right eye frame picture.

[0004] However, during the left-eye frame / right-eye frame time, since the voltage is continuously applied on both sides of the liquid crystal layer, the continuous application of the voltage causes electrons to accumulate on both sides of the liquid crystal layer and break down the liquid crystal layer. Summary of the invention

[0005] The existing liquid crystal layer driving scheme, due to the continuous application of voltage on both sides of the liquid crystal layer, easily causes the accumulation of electrons on both sides of the liquid crystal layer and breaks down the liquid crystal layer.

[0006] In response to the above problems, a high-response speed liquid crystal inversion control method and system are proposed. By reducing the low-voltage cyclotron frequency, the charge accumulation effect caused by continuous output voltage is avoided, and the problem of liquid crystal layer breakdown caused by charge accumulation is solved, which is beneficial to delaying the life of the liquid crystal layer and increasing its reliability.

[0007] In a first aspect, a high response speed liquid crystal inversion control method comprises:

[0008] Step 100, inputting a low voltage in a first direction for 1t time to the first light valve and the second light valve respectively, so that the liquid crystal molecule layer is in a natural rotation state;

[0009] Step 200, inputting a high voltage in the second direction for 1t time to the first light valve, so that the liquid crystal molecule layer deflects to the left, generating left-handed light;

[0010] Step 300, inputting a high voltage in the first direction for 1t time to the second light valve, so that the liquid crystal molecular layer deflects to the right, generating right-handed light;

[0011] Step 400, repeating steps 100-300 to perform 3D display;

[0012] The first direction is opposite to the second direction.

[0013] In conjunction with the high response speed liquid crystal inversion control method described in the first aspect of the present invention, in a first possible implementation manner, the absolute value of the high voltage is greater than twice the absolute value of the low voltage.

[0014] In a second aspect, a high response speed liquid crystal inversion control system is provided, sampling the control method of the first aspect, comprising:

[0015] Control module;

[0016] a first light valve;

[0017] a second light valve;

[0018] 3D screen;

[0019] The 3D screen includes a liquid crystal molecule layer;

[0020] The first light valve and the second light valve are electrically connected to the liquid crystal molecule layer respectively, and are used to control the natural rotation and left / right deflection of the liquid crystal molecule layer;

[0021] The first light valve and the second light valve are also electrically connected to the control module respectively;

[0022] The control module is used for:

[0023] Inputting a low voltage in a first direction for 1t time to the first light valve and the second light valve respectively, so that the liquid crystal molecular layer is in a natural rotation state;

[0024] Inputting a high voltage in the second direction for 1t time to the first light valve causes the liquid crystal molecule layer to deflect to the left, thereby generating left-handed light;

[0025] Inputting a high voltage in the first direction for 1t time to the second light valve causes the liquid crystal molecule layer to deflect to the right, thereby generating right-handed light;

[0026] Repeat steps 100-300 to perform 3D display;

[0027] The first direction is opposite to the second direction.

[0028] In conjunction with the high response speed liquid crystal inversion control system described in the second aspect of the present invention, in a first possible implementation manner, the absolute value of the high voltage is greater than twice the absolute value of the low voltage.

[0029] The high response speed liquid crystal inversion control method and system described in the present invention avoids the charge accumulation effect caused by continuous output voltage by reducing the low voltage swing frequency, solves the problem of liquid crystal layer breakdown caused by charge accumulation, and is beneficial to delaying the life of the liquid crystal layer and increasing its reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the timing of light valve driving in the prior art;

[0032] Figure 2 It is a schematic diagram of the light valve driving timing in the present invention;

[0033] Figure 3 It is a schematic flow chart of the high response speed liquid crystal inversion control method of the present invention;

[0034] Figure 4 It is a schematic diagram of a high response speed liquid crystal inversion control system in the present invention;

[0035] Component symbol description: 10 - control module, 20 - first light valve, 30 - second light valve, 40 - 3D screen, 41 - liquid crystal molecule layer. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] The existing liquid crystal layer driving scheme, due to the continuous application of voltage on both sides of the liquid crystal layer, easily causes the accumulation of electrons on both sides of the liquid crystal layer and breaks down the liquid crystal layer.

[0039] In view of the above problems, a high response speed liquid crystal inversion control method and system are proposed.

[0040] Example 1

[0041] In a first aspect, a high response speed liquid crystal inversion control method includes step 100, inputting a low voltage in a first direction for 1t time to the first light valve 20 and the second light valve 30 respectively, so that the liquid crystal molecule layer 41 is in a natural rotation state; step 200, inputting a high voltage in a second direction for 1t time to the first light valve 20, so that the liquid crystal molecule layer 41 deflects to the left to generate left-handed light; step 300, inputting a high voltage in the first direction for 1t time to the second light valve 30, so that the liquid crystal molecule layer 41 deflects to the right to generate right-handed light; step 400, repeating steps 100-300 to perform 3D display; wherein the first direction is opposite to the second direction.

[0042] like Figure 1 In the prior art, during the switching process between left and right optical rotation, the left-handed light / right-handed light needs to be rotated to its original state. After applying a high voltage in the first direction for 1t time, a low voltage in the second direction for 1t time is required to rotate the liquid crystal molecules. Then, a high voltage in the second direction is applied to deflect the liquid crystal molecules to the right. In this way, the voltage applied in the second direction is expressed by formula (1):

[0043] V2=t×(V L +V H ) (1)

[0044] Continuously applying voltage can easily cause electrons to accumulate on both sides of the liquid crystal layer and break through the liquid crystal layer.

[0045] In this embodiment, when t V is applied to the first light valve 20 and the second light valve 30, L After the low voltage is applied, the liquid crystal molecules are in a gyration state, which is equivalent to consuming the high voltages in the first direction and the second direction applied by the first light valve 20 and the second light valve 30. Since, in the first possible implementation, the absolute value of the high voltage is greater than twice the absolute value of the low voltage. Therefore, the applied 2t V L The low voltage is much smaller than V2, and will not cause the breakdown of the liquid crystal molecule layer 41. At the same time, during the left-right deflection process, it is reversed from time to time, and a high voltage in one direction will not be continuously applied to the liquid crystal molecule layer 41. After the left-right deflection is completed, a low voltage is applied to naturally rotate. By reducing the low voltage rotation frequency, the charge accumulation effect caused by the continuous output voltage is avoided, and the breakdown problem of the liquid crystal layer caused by charge accumulation is solved, which is conducive to delaying the life of the liquid crystal layer and increasing its reliability.

[0046] Example 2

[0047] In a second aspect, a high response speed liquid crystal inversion control system is provided, sampling the control method of the first aspect, comprising: a control module 10, a first light valve 20, a second light valve 30 and a 3D screen 40; the 3D screen 40 comprises a liquid crystal molecule layer 41; the first light valve 20 and the second light valve 30 are respectively electrically connected to the liquid crystal molecule layer 41, and are used to control the natural rotation and left / right deflection of the liquid crystal molecule layer 41; the first light valve 20 and the second light valve 30 are also respectively electrically connected to the control module 10; the control module 10 is used to input a low voltage in a first direction for 1t time to the first light valve 20 and the second light valve 30, respectively, so that the liquid crystal molecule layer 41 is in a natural rotation state; input a high voltage in a second direction for 1t time to the first light valve 20, so that the liquid crystal molecule layer 41 is deflected to the left, generating left-handed light; input a high voltage in the first direction for 1t time to the second light valve 30, so that the liquid crystal molecule layer 41 is deflected to the right, generating right-handed light; wherein the first direction is opposite to the second direction.

[0048] Here, the absolute value of the high voltage is greater than twice the absolute value of the low voltage.

[0049] The high response speed liquid crystal inversion control method and system of the present invention avoids the charge accumulation effect caused by continuous output voltage by reducing the low voltage swing frequency, solves the problem of liquid crystal layer breakdown caused by charge accumulation, and is beneficial to delaying the life of the liquid crystal layer and increasing its reliability.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high response speed liquid crystal inversion control method, characterized in that: include: Step 100, inputting a low voltage in a first direction for 1t time to the first light valve and the second light valve respectively, so that the liquid crystal molecule layer is in a natural rotation state; Step 200, inputting a high voltage in the second direction for 1t time to the first light valve, so that the liquid crystal molecule layer deflects to the left, generating left-handed light; Step 300, inputting a high voltage in the first direction for 1t time to the second light valve, so that the liquid crystal molecular layer deflects to the right, generating right-handed light; Step 400, repeating steps 100-300 to perform 3D display; The first direction is opposite to the second direction.

2. The high response speed liquid crystal inversion control method according to claim 1, characterized in that: The absolute value of the high voltage is greater than twice the absolute value of the low voltage.

3. A high response speed liquid crystal inversion control system, sampling the control method according to any one of claims 1-2, characterized in that: include: Control module; a first light valve; a second light valve; 3D screen; The 3D screen includes a liquid crystal molecule layer; The first light valve and the second light valve are electrically connected to the liquid crystal molecule layer respectively, and are used to control the natural rotation and left / right deflection of the liquid crystal molecule layer; The first light valve and the second light valve are also electrically connected to the control module respectively; The control module is used for: Inputting a low voltage in a first direction for 1t time to the first light valve and the second light valve respectively, so that the liquid crystal molecular layer is in a natural rotation state; Inputting a high voltage in the second direction for 1t time to the first light valve causes the liquid crystal molecule layer to deflect to the left, thereby generating left-handed light; Inputting a high voltage in the first direction for 1t time to the second light valve causes the liquid crystal molecule layer to deflect to the right, thereby generating right-handed light; Repeat steps 100-300 to perform 3D display; The first direction is opposite to the second direction.

4. The high response speed liquid crystal inversion control system according to claim 3, characterized in that: The absolute value of the high voltage is greater than twice the absolute value of the low voltage.

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