Improved reflective display screen front light supplementing system

Abstract

The invention discloses an improved reflective display screen front light supplementing system which comprises the steps that S1, an OCA light supplementing layer is prepared, specifically, optical clear adhesive OCA is adopted to replace a traditional light guide plate for light supplementing after being hardened, the OCA light supplementing layer can be tightly attached to the position between a CG and a reflective display, and the gap between the CG and the reflective display is completely filled; s2, preparing spherical particles: uniformly adding the spherical particles into the OCA, wherein the concentration, the particle size and the refractive index of the spherical particles are accurately designed, regulated and controlled; s3, a reflecting layer is arranged, specifically, the reflecting layer is arranged at the bottom of the OCA light supplementing layer; and S4, the structure is attached, wherein possible air can be completely removed in the attaching process through the advanced vacuum attaching technology. The OCA light supplement layer is adopted to replace a traditional light guide plate, and generation of an air layer between the CG and the reflective display is successfully avoided. The improvement fundamentally solves the problem of energy loss of light caused by refraction and reflection of an air layer. Compared with a traditional light guide plate, the OCA light supplementing layer can be thinner.

Description

Technical Field

[0001] The present invention relates to the technical field of reflective display screens, and particularly to an improved front-light supplementary lighting system for a reflective display screen. Background Art

[0002] In the application of reflective display screens, in order to improve the display effect, front-light supplementary lighting technology is widely used. Currently, the common method is front-light guide plate supplementary lighting, but this method has many drawbacks. An air layer will be formed between the front-light guide plate and the display screen. Due to the existence of the air layer, light will refract, reflect and other phenomena during the propagation process, resulting in a decrease in the light propagation efficiency, and further affecting the display effect, and the clarity, contrast and brightness uniformity of the image are affected. At the same time, the material and structural characteristics of the front-light guide plate itself will also interfere with the display effect. For example, the optical uniformity problem of the light guide plate may cause uneven brightness and darkness on the display screen. In addition, due to the thickness limitation of the front-light guide plate, the thickness reduction of the entire display is greatly restricted, and it cannot meet the development trend of the thin and light of modern electronic devices. Therefore, in view of the above deficiencies, this solution proposes an improved front-light supplementary lighting system for a reflective display screen. Summary of the Invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and provide an improved front-light supplementary lighting system for a reflective display screen. By using an OCA supplementary lighting layer to replace the traditional light guide plate, the generation of the air layer between the CG and the reflective display is successfully avoided. This improvement fundamentally solves the problem of energy loss caused by the refraction and reflection of light due to the air layer, and significantly improves the light utilization rate. In terms of the actual display effect, the clarity of the image is greatly improved, the edges of the text are sharper, and the details of the image are richer.

[0004] The OCA supplementary lighting layer can be made thinner than the traditional light guide plate, and since there is no need to reserve space for the air layer, the entire display has greater advantages in terms of thickness reduction. And the special bonding process makes the OCA supplementary lighting layer closely bonded with the CG and the reflective display to form a stable whole. This closely bonded structure can effectively resist the influence of external vibrations, temperature changes and other factors, and reduce the display failures caused by component loosening or displacement.

[0005] The present invention also provides an improved front light supplementary lighting system for a reflective display screen. S1, OCA supplementary lighting layer: After hardening the optical clear adhesive (OCA), it is used to replace the traditional light guide plate for supplementary lighting. By closely fitting the OCA supplementary lighting layer between the CG and the reflective display, the gap between the two is completely filled, effectively avoiding the generation of an air layer. S2, spherical particles: Spherical particles are uniformly added to the OCA. The concentration, particle size, and refractive index of these spherical particles are precisely designed and regulated. When light enters the OCA supplementary lighting layer, the spherical particles will scatter the light evenly in all directions, making the light more evenly distributed on the surface of the display screen, thereby significantly optimizing the brightness uniformity of the display. S3, reflective layer: A reflective layer is provided at the bottom of the OCA supplementary lighting layer. The reflective layer selects a metal reflective film with a high reflectivity and a multi-layer dielectric reflective film to reflect the light transmitted through the display screen back into the interior of the display screen. S4, fitting structure: Through an advanced vacuum fitting technology, air that may exist can be completely removed during the fitting process, enabling seamless connection between the OCA supplementary lighting layer and the CG and the reflective display.

[0006] An improved front light supplementary lighting system for a reflective display screen according to the present invention, the OCA in the OCA supplementary lighting layer has extremely high optical transparency, and during the hardening process, it forms a stable and uniform structure.

[0007] An improved front light supplementary lighting system for a reflective display screen according to the present invention, the OCA supplementary lighting layer is closely attached to the CG layer, effectively eliminating the negative impact of the air layer on the light propagation, enabling the light to be transmitted more efficiently between the supplementary lighting layer and the display screen.

[0008] An improved front light supplementary lighting system for a reflective display screen according to the present invention, a reflective layer is provided at the bottom of the OCA supplementary lighting layer, enabling the light that would otherwise be lost to participate in the display process again, increasing the light utilization efficiency, and thereby improving the overall brightness of the display screen. The propagation direction of the light by the reflective layer is adjusted by the spherical particles, making the light more evenly distributed on the display screen.

[0009] An improved front light supplementary lighting system for a reflective display screen according to the present invention, the closely attached structure of the OCA supplementary lighting layer to the CG and the reflective display effectively enhances the stability and reliability of the entire supplementary lighting system. Even when the electronic device is subjected to a certain vibration or external force, the various parts of the supplementary lighting system will not separate or displace, ensuring the consistency and stability of the display effect.

[0010] An improved front light supplementary lighting system for a reflective display screen according to the present invention, the spherical particles utilize the principle of light refraction, n21 = Sinθ1 / Sinθ2, where the spherical particles are transparent substances, reducing light divergence. The refractive index of the spherical particles is less than that of the OCA, guiding the light to the reflective display.

[0011] An improved front - light supplementary lighting system for a reflective display screen provided by the present invention. Without significantly attenuating the light intensity, the spherical particles efficiently scatter light, and clear and uniformly bright images can be seen when viewing the display screen obliquely from different angles.

[0012] Compared with the prior art, in an improved front - light supplementary lighting system for a reflective display screen of the present invention, by using an OCA supplementary lighting layer to replace the traditional light guide plate, the generation of an air layer between the CG and the reflective display is successfully avoided. This improvement fundamentally solves the problem of energy loss caused by the refraction and reflection of light due to the air layer, and significantly improves the light utilization rate. In terms of the actual display effect, the clarity of the image is greatly improved, the edges of the text are sharper, and the details of the image are richer.

[0013] Compared with the prior art, in an improved front - light supplementary lighting system for a reflective display screen of the present invention, the OCA supplementary lighting layer can be made thinner than the traditional light guide plate, and since there is no need to reserve space for the air layer, the entire display has a greater advantage in terms of thickness reduction. And the special bonding process makes the OCA supplementary lighting layer closely bonded to the CG and the reflective display, forming a stable whole. This closely bonded structure can effectively resist the influence of external vibrations, temperature changes and other factors, and reduce display failures caused by component loosening or displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the drawings and embodiments;

[0015] Figure 1 It is the overall machine architecture diagram of an improved front - light supplementary lighting system for a reflective display screen of the present invention;

[0016] Figure 2 It is the comparison diagram before and after the optimization of the structure of the reflective display of an improved front - light supplementary lighting system for a reflective display screen of the present invention;

[0017] Figure 3 It is the schematic diagram of the light scattering of spherical particles in an improved front - light supplementary lighting system for a reflective display screen of the present invention;

[0018] Figure 4 It is the principle diagram of the light refraction of spherical particles in an improved front - light supplementary lighting system for a reflective display screen of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0020] Referring to Figures 1-4 , an improved front light supplementary light system for a reflective display screen in an embodiment of the present invention includes the following steps:

[0021] Step 1: Preparation of the OCA light supplementary layer: According to the size, shape, and optical performance requirements of the reflective display and the CG, select a suitable optical clear adhesive (OCA) material. Cut the selected OCA material according to precise dimensions to ensure that it can completely cover the area that needs light supplementation. Then, evenly disperse precisely measured spherical particles in the OCA. To ensure the uniform distribution of the spherical particles, a combination of various methods such as stirring and ultrasonic dispersion can be used. During the dispersion process, strictly control the process parameters, such as the stirring speed and ultrasonic time, to ensure that the spherical particles form a stable and uniform dispersion system in the OCA. After the dispersion of the spherical particles is completed, harden the OCA by means of thermal curing or light curing to form an OCA light supplementary layer with a stable structure and optical performance.

[0022] Step 2: Fabrication of the reflective layer: According to the size and optical requirements of the OCA light supplementary layer, select a suitable high-reflectivity material to fabricate the reflective layer. One option is to use a metal reflective film, and a metal film can be evenly deposited on the bottom of the OCA light supplementary layer by means of vacuum coating. During the coating process, precisely control the coating thickness, temperature, and vacuum degree parameters to ensure that the metal reflective film has a high reflectivity and good uniformity. Another option is to use a multi-layer dielectric reflective film, and in this case, different refractive index dielectric films need to be deposited layer by layer according to the pre-designed film system structure using coating equipment. The thickness and refractive index of each dielectric film need to be precisely controlled to achieve the best reflection effect.

[0023] Step 3: Lamination and assembly: Adopt vacuum lamination technology to laminate the fabricated OCA light supplementary layer with the reflective layer onto the CG and the reflective display. Before lamination, clean the surfaces of the CG and the reflective display to remove surface dust, oil, and other impurities to ensure the lamination quality. Place the OCA light supplementary layer between the CG and the reflective display, and then put it into a vacuum lamination device. In a vacuum environment, precisely control parameters such as the lamination temperature, pressure, and time to make the OCA light supplementary layer closely adhere to the CG and the reflective display, ensuring that there are no bubbles or gaps between them and achieving a seamless connection. After lamination is completed, conduct a preliminary inspection of the entire light supplementary system to check the lamination quality and optical performance to ensure that the light supplementary system meets the design requirements.

[0024] Step 4. Detection and Optimization: Conduct a comprehensive inspection on the assembled supplementary lighting system, including optical performance detection and structural performance detection. Optical performance detection mainly includes measuring parameters such as the brightness, contrast ratio, brightness uniformity, and color rendering of the display screen. Test the supplementary lighting system with professional optical testing equipment and compare the test results with the design standards. If any deviation in optical performance is found, analyze the reasons and make corresponding adjustments, such as adjusting the concentration of spherical particles and optimizing the structure of the reflective layer. Structural performance detection mainly checks the fitting condition between the components of the supplementary lighting system. Through microscopic observation and ultrasonic detection methods, ensure that the OCA supplementary lighting layer is closely attached to the CG and the reflective display without problems such as looseness or delamination. After detection and optimization, the supplementary lighting system reaches the best performance state to meet the requirements of actual applications.

[0025] Working Principle: After ambient light enters the OCA supplementary lighting layer, it is first scattered by spherical particles, making the light evenly distributed within the OCA supplementary lighting layer. Since the OCA supplementary lighting layer is closely attached between the CG and the reflective display, avoiding the interference of the air layer, these evenly distributed light rays can smoothly pass through the OCA supplementary lighting layer to reach the display screen, illuminating the pixel points of the display screen and achieving clear image display. Some of the light rays passing through the display screen will reach the bottom reflective layer, and the reflective layer precisely reflects this part of the light back to the display screen, participating in the image display process again, thereby further improving the light utilization efficiency and the brightness of the display screen.

[0026] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. An improved reflective display screen front light fill system, characterized in that: include: S1. OCA fill light layer: Optical transparent adhesive OCA is hardened to replace the traditional light guide plate for fill light. The OCA fill light layer can be tightly attached between the CG and the reflective display to completely fill the gap between the two, effectively avoiding the formation of an air layer. S2. Spherical particles: Spherical particles are evenly added to OCA. The concentration, particle size and refractive index of these spherical particles are precisely designed and controlled. When light enters the OCA light-filling layer, the spherical particles will scatter the light evenly in all directions, making the light more evenly distributed on the display surface, thereby significantly optimizing the brightness uniformity of the display; S3, reflection layer: a reflection layer is set at the bottom of the OCA fill light layer. The reflection layer uses a metal reflection film and a multi-layer dielectric reflection film with high reflectivity to reflect the light passing through the display back to the inside of the display; S4. Laminating structure: Through advanced vacuum laminating technology, any air that may exist can be completely removed during the laminating process, so that the OCA fill light layer can be seamlessly connected with the CG and reflective display.

2. The improved reflective display screen front light fill system according to claim 1, characterized in that: The OCA in the OCA light-filling layer has extremely high optical transparency, and during the curing process, it forms a stable and uniform structure.

3. The improved reflective display screen front light fill system according to claim 1, characterized in that: The OCA fill light layer is closely attached to the CG layer, thereby effectively eliminating the negative impact of the air layer on light propagation, so that light can be transmitted more efficiently between the fill light layer and the display screen.

4. The improved reflective display screen front light fill system according to claim 1, characterized in that: A reflective layer is set at the bottom of the OCA fill light layer to re-incorporate the light that would otherwise be lost into the display process, thereby increasing the utilization efficiency of the light and further improving the overall brightness of the display screen. The reflective layer adjusts the propagation direction of the light through spherical particles to make the light more evenly distributed on the display screen.

5. The improved reflective display screen front light fill system according to claim 1, characterized in that: The close fitting structure of the OCA fill light layer, CG and reflective display effectively enhances the stability and reliability of the entire fill light system. Even when the electronic device is subjected to certain vibrations and external forces, there will be no separation or displacement between the various parts of the fill light system, thereby ensuring the consistency and stability of the display effect.

6. The improved reflective display screen front light fill system according to claim 1, characterized in that: The spherical particles utilize the principle of light refraction, n21=Sinθ1 / Sinθ2, wherein the spherical particles are transparent materials, which reduce light divergence, and the refractive index of the spherical particles is less than the refractive index of the OCA, thereby guiding the light to the reflective display.

7. The improved reflective display screen front light fill system according to claim 1, characterized in that: The spherical particles scatter light efficiently without significantly attenuating the light intensity, so that a clear image with uniform brightness can be seen when the display screen is viewed from different angles.

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