Bistable reflection type segment code liquid crystal display screen

Abstract

The utility model belongs to the technical field of liquid crystal display screens, and discloses a bistable reflection type segment code liquid crystal display screen which comprises a glass layer, a segment code substrate, a first polarization layer, a liquid crystal layer, a second polarization layer and a backlight, a light source in a backlight assembly emits light rays, and the light rays are processed by a diffusion sheet and a prismatic lens to form uniform horizontal light beams; the broken code substrate is provided with hollowed holes to form a pattern, and a preset light-transmitting pattern is screened out. The liquid crystal layer applies voltage through the transverse and longitudinal electrode strips to change an electric field and control the liquid crystal molecule optical rotation effect. The second polaroid only allows vertical light waves to pass through, after light rays are processed by the liquid crystal layer, light waves in the horizontal direction penetrate through the first polaroid to achieve bright state display, and unprocessed light rays are intercepted to be in a dark state. The display screen abandons the traditional ink broken code principle, utilizes liquid crystal optical characteristics and polarized light modulation, has high brightness and strong compression resistance and shock resistance, can clearly display in a dark environment, and effectively solves the problems of low display brightness, fragile structure and the like of a traditional broken code screen.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal display technology, specifically a bistable reflective segment liquid crystal display. Background Technology

[0002] In the field of electronic displays, segmented display screens, due to their ability to display fixed segmented patterns, have become common display components in devices such as mathematical calculators, electronic clocks, and simple electronic instruments. These displays, with their advantages of simple monochrome display, low-cost manufacturing, and low-power operation, meet the basic display needs of devices that only require displaying fixed content, and occupy an important position in consumer electronics and basic industrial equipment.

[0003] However, traditional broken-code display screens have revealed numerous problems in practical applications. Firstly, their pressure resistance is extremely weak. Broken-code display screens primarily rely on printing light-blocking ink onto a substrate to form patterned areas, while the unprinted areas allow light to pass through. This ink-printing-dependent display method results in a fragile display structure. When subjected to external pressure, the bonding force between the ink layer and the substrate is insufficient, easily leading to ink displacement. Once the ink shifts, the displayed pattern becomes blurry, or even causes permanent damage. Furthermore, strong vibrations can also impact the ink layer, causing ink displacement and impairing the display's functionality. Statistics show that during transportation and daily use, the damage rate of broken-code display screens due to vibration and compression is as high as 30%.

[0004] Low display brightness is another major challenge faced by screens with broken serial numbers. Because these screens rely on ambient light reflection for display, the light absorption characteristics of the ink layer itself result in generally low brightness. Under normal indoor lighting conditions, the brightness of these screens can only reach 10-30 cd / m². 2 The brightness is far below the standard for LCD screens. This excessively low brightness makes it impossible to add protective structures such as glass to the surface of the broken code screen. Adding a glass cover would further reduce brightness after light refraction through the glass and filtering by the ink layer, resulting in even worse display quality. This not only reduces the shock and pressure resistance of the broken code screen but also makes it almost impossible to display content properly in dim environments, severely limiting its application scenarios. Utility Model Content

[0005] Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a bistable reflective segment LCD display screen, which solves the problems mentioned in the background section, such as low brightness and poor pressure and shock resistance of traditional segment LCD screens.

[0007] (II) Technical Solution

[0008] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a bistable reflective segment LCD display screen, comprising:

[0009] A glass layer, wherein the glass layer is a light-transmitting glass with high mechanical properties, and the glass layer is disposed on the top surface;

[0010] The code break substrate is an opaque light-shielding material, and the code break substrate is disposed below the glass layer;

[0011] The first polarization is a planar plate, which polarizes light and only allows horizontal light waves to pass through.

[0012] A liquid crystal layer, wherein the liquid crystal layer is a planar plate-shaped aggregate of liquid crystal material;

[0013] The second polarization, which is a planar plate, polarizes light and only allows light waves in the vertical direction to pass through.

[0014] Backlight, which provides light for the display.

[0015] Preferably, the code break substrate is provided with multiple sets of code break patterns.

[0016] Preferably, the broken code pattern lines are hollow holes on the broken code substrate, and light can pass through the broken code pattern.

[0017] Preferably, the liquid crystal layer is provided with multiple sets of crisscrossing horizontal and vertical electrode strips, which divide the liquid crystal particles into multiple bright spot areas.

[0018] Preferably, the backlight includes a light source, a diffuser, and a prism sheet. The light source is a light-emitting source, and a diffuser is disposed in front of the light source. A prism sheet is disposed in front of the diffuser.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, this utility model provides a bistable reflective segment LCD display screen, which has the following beneficial effects:

[0021] 1. This bistable reflective segment LCD display screen has a glass layer, a segment substrate, a first polarization layer, a liquid crystal layer, a second polarization layer, and a backlight. It uses the liquid crystal display principle to simulate the display of segment patterns, has high brightness, good pressure and shock resistance, and excellent display effect.

[0022] 2. It is equipped with a high-strength glass layer, which improves the mechanical properties of the LCD screen and greatly enhances its pressure resistance.

[0023] 3. It is equipped with a code-breaking substrate. The code-breaking pattern, which combines light-blocking and light-transmitting, can realize code-breaking display. The display screen does not use the ink code-breaking principle, but adopts the liquid crystal principle. It does not contain ink, so there will be no ink shifting due to vibration. It has very strong shock resistance and has the advantages of liquid crystal display screens. The display brightness is very high, the display effect is good, and it can still be clearly displayed in dim environments. Attached Figure Description

[0024] Figure 1 This is an exploded view of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the liquid crystal layer structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the backlight structure of this utility model;

[0027] Figure 4 This is a diagram illustrating a broken code pattern according to the present invention.

[0028] In the figure: 1. Glass layer; 2. Broken code substrate; 3. First polarization; 4. Liquid crystal layer; 5. Second polarization; 6. Backlight; 7. Broken code pattern; 8. Horizontal and vertical electrode strips; 9. Bright spot area; 10. Light source; 11. Diffuser; 12. Prism sheet. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-4 This utility model provides a technical solution:

[0031] A bistable reflective segment LCD display, comprising:

[0032] Glass layer 1 is a high-performance transparent glass, and glass layer 1 is located on the top surface;

[0033] The code-breaking substrate 2 is an opaque light-shielding material and is disposed below the glass layer 1. The code-breaking substrate 2 performs code-breaking processing on the light, which enables the screen to finally display a code-breaking pattern.

[0034] The first polarization 3 is a planar material that polarizes light. The first polarization 3 only allows horizontal light waves to pass through. The first polarization 3 receives light that has passed through the liquid crystal layer 4. If the liquid crystal layer 4 does not process the light, the first polarization 3 will intercept the light. The light that has been processed by the liquid crystal layer 4 rotates, in which vertical light waves are intercepted and horizontal light waves pass through the first polarization 3 to achieve display.

[0035] Liquid crystal layer 4 is a planar plate-shaped aggregate of liquid crystal material; light rays passing through the second polarization 5 reach the glass layer 1 and rotate at a certain angle due to the optical rotation effect of the liquid crystal material.

[0036] The second polarization 5 is a planar plate that polarizes light. The second polarization 5 only allows light waves in the vertical direction to pass through. When the light reaches the second polarization 5 from bottom to top, all the light waves in the horizontal direction are blocked, leaving only the light in the vertical direction to pass through the second polarization 5.

[0037] Backlight 6 provides light for the display.

[0038] Furthermore, multiple sets of break pattern 7 are provided on the break substrate 2. The break pattern 7 is set with different line patterns according to the actual display requirements.

[0039] Furthermore, the lines of the break pattern 7 are cut-out holes on the break pattern substrate 2, allowing light to pass through. The break pattern 7 restricts the passage of light, allowing only light to follow a preset pattern, thus ensuring the display of the break pattern.

[0040] Furthermore, multiple sets of crisscrossing horizontal and vertical electrode strips 8 are arranged on the liquid crystal layer 4, which divide the liquid crystal particles into multiple bright spot areas 9. The horizontal and vertical electrode strips 8 can change the voltage, thereby changing the electric field intensity. According to the optical rotation principle of liquid crystal materials, they can rotate light by a certain angle.

[0041] Furthermore, the backlight 6 includes a light source 10, a diffuser 11, and a prism sheet 12. The light source 10 is a light-emitting source, and the diffuser 11 is disposed in front of the light source 10. The prism sheet 12 is disposed in front of the diffuser 11. The diffuser 11 makes the light intensity distribution uniform, and the prism sheet 12 constrains the light direction so that the backlight 6 emits horizontal light.

[0042] Structural Description:

[0043] Glass layer 1: High-performance transparent glass located at the top, providing physical protection for the display screen and ensuring normal light transmission;

[0044] Broken code substrate 2: An opaque light-shielding plate disposed below the glass layer, which filters light through the broken code pattern 7 cut out on it to achieve broken code display;

[0045] First polarization 3: Planar substrate, which only allows horizontal light waves to pass through, and achieves the switching of brightness of the display state by intercepting or transmitting light processed by liquid crystal layer 4;

[0046] Liquid crystal layer 4: a planar plate-shaped liquid crystal material aggregate, which is divided into multiple bright spot areas 9 by horizontal and vertical electrode strips 8. The arrangement of liquid crystal molecules is changed by an electric field, causing light to undergo an optical rotation effect.

[0047] Second polarization 5: Planar substrate, which only allows vertical light waves to pass through, polarizes and filters the backlight light, and only allows vertical light waves to enter the liquid crystal layer 4;

[0048] Backlight 6: A component that provides light for the display, including a light source 10, a diffuser 11, and a prism sheet 12, responsible for generating and preprocessing light;

[0049] Broken code pattern 7: The cut-out holes on the broken code substrate 2 limit the path of light to ensure that the display screen displays the broken code content according to the preset pattern;

[0050] Horizontal and vertical electrode strips 8: Multiple sets of horizontal and vertical electrodes are disposed on the liquid crystal layer 4. The electric field strength is adjusted by changing the voltage to control the optical rotation angle of the liquid crystal molecules.

[0051] Bright spot area 9: An independent display unit formed by liquid crystal particles separated by horizontal and vertical electrode strips 8, which realizes bright or dark display through the liquid crystal optical rotation effect;

[0052] Light source 10: The light-emitting core in backlight 6, emitting initial light and providing the light source basis for the display;

[0053] Diffuser 11: An optical element located in front of the light source 10, which makes the light intensity distribution uniform through scattering;

[0054] Prism sheet 12: An optical element located in front of diffuser sheet 11, which constrains the direction of light through refraction and reflection, so that the backlight emits horizontal light.

[0055] Working Principle: The working principle of the bistable reflective segment LCD display is achieved through the synergistic effect of the glass layer, segment substrate, dual polarizers, liquid crystal layer, and backlight system. It utilizes the optical properties of the liquid crystal material and polarization control to achieve precise display of segment patterns. The entire display process can be divided into four core stages: light generation and preprocessing, segment pattern formation, liquid crystal optical rotation control, and polarization screening. In the light generation and preprocessing stage, the light source 10 in the backlight 6 acts as the light-emitting core, emitting initial light. The light then passes through the diffuser 11 and the prism sheet 12 in sequence: the diffuser 11 redistributes the uneven light emitted by the light source through scattering, making the light intensity more uniform across the entire plane; the prism sheet 12, through refraction and reflection, constrains the light into horizontal light parallel to the display plane, providing a uniform and directional light source foundation for subsequent display processes. The segment pattern formation stage relies on the special design of the segment substrate 2. The segment substrate 2 uses an opaque light-shielding material, on which multiple sets of segment patterns 7 exist in the form of perforated holes. When the horizontal light emitted by the backlight 6 propagates upward to the broken code substrate 2, the uncut areas completely block the light, while the perforated areas corresponding to the broken code pattern 7 allow the light to pass through, thus forming a preset light-transmitting pattern. These rays passing through the broken code substrate 2 become the basic light signals for the final displayed pattern. The optical rotation control of the liquid crystal layer 4 is a key step in achieving display state switching. The liquid crystal layer 4 is composed of planar plate-shaped liquid crystal material aggregates, and multiple sets of crisscrossing horizontal and vertical electrode strips 8 separate the liquid crystal particles into multiple bright spot areas 9. When no voltage is applied, the liquid crystal molecules are in a natural alignment state. Vertical light passing through the second polarization 5 enters the liquid crystal layer 4 without significant optical changes. However, when a specific voltage is applied to the horizontal and vertical electrode strips 8, the generated electric field changes the alignment direction of the liquid crystal molecules. According to the optical rotation principle of liquid crystal materials, the vertical light entering the liquid crystal layer 4 will rotate at a certain angle (usually 90 degrees) under the action of the electric field, converting the originally vertical light wave into a horizontal one. The polarization light filtering process is jointly completed by the first polarization 3 and the second polarization 5. The second polarization 5 only allows vertical light waves to pass through. When the horizontal light generated by the backlight passes through the pattern filtering of the code-breaking substrate 2, all horizontal light waves are blocked when passing through the second polarization 5, leaving only vertical light waves to pass through. After these vertical light rays enter the liquid crystal layer 4, different results occur depending on whether they are subjected to an electric field: if no voltage is applied to the liquid crystal layer 4, the light remains vertical and enters the first polarization 3. Since the first polarization 3 only allows horizontal light waves to pass through, the light will be blocked, and the corresponding area will appear dark; if the liquid crystal layer 4 rotates the light 90 degrees under the action of an electric field, transforming it into a horizontal light wave, it can pass smoothly through the first polarization 3, reach the glass layer 1, and be reflected back to the human eye, and the corresponding area will appear bright. By precisely controlling the voltage of the horizontal and vertical electrode strips 8, the liquid crystal molecules in different bright spot areas 9 can be selectively made to rotate, and combined with the light path defined by the code-breaking substrate 2, a clear code-breaking pattern is finally presented on the display screen.Throughout the entire process, the high-mechanical-performance glass layer 1 not only provides physical protection for the display screen, but its light-transmitting properties also ensure the normal propagation of light. The synergistic effect of the dual polarizers and the liquid crystal layer 4 enables dynamic control over light transmission, allowing the display screen to present fragmented content with high brightness and high contrast. This display mechanism, based on the optical properties of liquid crystals and polarized light modulation, fundamentally solves the problems of poor pressure resistance and insufficient brightness compared to traditional ink-based fragmented content screens, providing a more reliable and efficient technical solution for displaying monochrome fixed content.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bistable reflective segment LCD display, characterized in that, include: Glass layer (1), wherein the glass layer (1) is a light-transmitting glass with high mechanical properties, and the glass layer (1) is disposed on the top surface; The code-breaking substrate (2) is an opaque light-shielding plate, and the code-breaking substrate (2) is disposed below the glass layer (1); The first polarization (3) is a planar plate material. The first polarization (3) polarizes light and only allows light waves in the horizontal direction to pass through. Liquid crystal layer (4), wherein the liquid crystal layer (4) is a planar plate-shaped aggregate of liquid crystal material; The second polarization (5) is a planar plate. The second polarization (5) polarizes the light and only allows light waves in the vertical direction to pass through. Backlight (6), which provides light for the display.

2. The bistable reflective segment LCD display screen according to claim 1, characterized in that: Multiple sets of broken code patterns (7) are provided on the broken code substrate (2).

3. A bistable reflective segment LCD display screen according to claim 2, characterized in that: The broken code pattern (7) is a hole cut out on the broken code substrate (2), and light can pass through the broken code pattern (7).

4. A bistable reflective segment LCD display screen according to claim 1, characterized in that: Multiple sets of horizontal and vertical electrode strips (8) are arranged on the liquid crystal layer (4), and the multiple sets of horizontal and vertical electrode strips (8) divide the liquid crystal particles into multiple bright spot areas (9).

5. A bistable reflective segment LCD display screen according to claim 1, characterized in that: The backlight (6) includes a light source (10), a diffuser (11) and a prism sheet (12). The light source (10) is a light-emitting light source. A diffuser (11) is provided on the front side of the light source (10), and a prism sheet (12) is provided on the front side of the diffuser (11).

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