CN112946953A

CN112946953A - Reflective display screen device

Info

Publication number: CN112946953A
Application number: CN202110180170.2A
Authority: CN
Inventors: 邱珠伟; 陈平; 熊攀伟; 西娅芳
Original assignee: Jiekai Communications Shenzhen Co Ltd
Current assignee: JRD Communication Shenzhen Ltd; Jiekai Communications Shenzhen Co Ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-06-11

Abstract

The embodiment of the application discloses reflective display screen device, it includes display screen, thin-film transistor backplate, compound leaded light module, preceding optical unit and first glue film. The thin film transistor backboard is used for reflecting light. The composite light guide module is positioned between the display screen and the thin film transistor backboard and comprises a first light guide layer and a second light guide layer, the second light guide layer is positioned between the first light guide layer and the thin film transistor backboard, the first light guide layer and the second light guide layer have different refractive indexes, and the first light guide layer and the second light guide layer have a dot structure. The front light unit is arranged on one side of the composite light guide module. The first glue layer is located between the display screen and the first light guide layer. The light reflection screen has the advantages that the light total reflection effect required by the reflection screen can be greatly improved under the condition that the design complexity is not increased.

Description

Reflective display screen device

Technical Field

The application relates to the technical field of display, in particular to a reflective display screen device suitable for terminal equipment.

Background

With the continuous development of communication technology, terminal products such as smart phones, tablet computers and notebook computers have become indispensable products for large use in daily life. The terminal products are developed towards diversification and individuation, and people can work and entertain through the terminal, for example, the terminal reads to obtain the latest messages. These electronic devices are equipped with displays, such as Liquid Crystal Displays (LCDs), Active-matrix organic light-emitting diodes (AMOLEDs), etc., and the displays, such as LCDs, AMOLEDs, etc., need backlight or self-luminous light sources to be lit, and the blue light carried by the light sources is harmful to human eyes. With the increase of the use time of display products such as mobile phones and flat panels, the incidence rate of ophthalmic diseases such as cataract and macular degeneration is increasing. The "blue light" (e.g., light having a wavelength in the middle of 410-470 nm) in the visible spectrum has the greatest effect on the eye. In general, blue light is harmful to the human eye as follows:

(1) increasing the risk of cataract: when the eyes are irradiated by high-energy short-wave blue light with the wavelength of 410-470 nm, the crystalline lens absorbs part of the blue light and gradually becomes turbid to form cataract, and most of the remaining blue light penetrates through the crystalline lens and directly reaches the retina to increase macular toxins in a macular area, so that macular degeneration or cataract is more easily caused.

(2) And increasing visual fatigue: since the wavelength of blue light is short, the focal point does not fall on the center of the retina, but is located a little bit further forward from the retina. To be clear, the eyeball is in a tense state for a long time, causing asthenopia. The long-time asthenopia may cause the deepening of myopia degree, the double vision when seeing, the easy serial reading, the inability to concentrate attention, the fuzzy near work and other symptoms, and influences the study and work efficiency.

(3) Leading to insomnia: when the brain enters a sleep state at night, the brain can secrete melatonin to promote sleep, eliminate fatigue and even play a role in killing cancer cells. However, blue light can inhibit the secretion of melatonin to a certain extent, thereby affecting low sleep quality and even difficulty in falling asleep. This may also be the reason why we are hard to fall asleep when playing a tablet or a mobile phone before sleeping at ordinary times.

In the course of research and practice on the prior art, the inventors of the embodiments of the present application found that, in order to provide a more comfortable reading experience for users, most Display manufacturers in the market provide a Display, i.e., a Reflective Display (RLCD), which does not need backlight or self-luminous lighting, and has a light emitting principle that a Reflective layer is plated in the Display to achieve the light emitting purpose by reflecting external light.

However, the reflective display screen itself cannot emit light, and is a screen that needs to reflect external ambient light to realize display. However, when the terminal with the reflective display screen lacks external light irradiation, the screen cannot display contents for the user to read, which is not convenient for the user to read and affects the reading experience of the user. Therefore, when the ambient light is weak, a front light unit scheme needs to be added.

More specifically, the reflective display is a display that directly reflects ambient light to serve as a light source of a screen without a backlight, and can be further divided into a passive reflective display and an active reflective display according to the presence or absence of an auxiliary light source. The display principle of the passive reflective display screen is that ambient light is reflected by plating a layer of reflective material on the bottom of the liquid crystal panel. The passive reflective display screen has a good display effect under a good ambient light source, and can reduce power consumption to save power consumption of the whole product. However, when the ambient light condition is poor, the passive reflective display panel will have a less than ideal display effect due to the reduction of the reflected light. In order to improve this problem, an active reflective display technique with an auxiliary light source is developed. The "active" reflective lcd panel is equivalent to adding a light source as illumination on top of the "passive" reflective lcd panel, so that a clear screen can be seen even when the ambient light is insufficient.

The current front light basically adopts a mode of combining a Light Emitting Diode (LED) with a light guide plate, light emitted by the LED is converted into surface light source to be emitted downwards through light guide plate mesh points, but when the front light module is attached to a touch screen, Optical Clear Adhesive (OCA) is adopted, and due to the fact that the OCA is soft rubber and has certain fluidity, the mesh points of the light guide plate are filled after the attachment, and the mesh point effect of the light guide plate is weakened or even offset. Resulting in the light not being able to travel downward. The utilization efficiency is greatly reduced.

Disclosure of Invention

Aiming at the problems, the embodiment of the application adopts a novel dot design scheme, so that dots of the light guide plate are built in, and the problem of low light efficiency caused by OCA filling dots is solved. And synchronously optimizing the subjective effect.

The embodiment of the application provides a reflective display screen device suitable for terminal equipment, and the reflective display screen device comprises a display screen, a thin film transistor backboard, a composite light guide module, a front light unit and a first glue layer. The thin film transistor backboard is used for reflecting light. The composite light guide module is positioned between the display screen and the thin film transistor backboard and comprises a first light guide layer and a second light guide layer, the second light guide layer is positioned between the first light guide layer and the thin film transistor backboard, the first light guide layer and the second light guide layer have different refractive indexes, and the first light guide layer and the second light guide layer have a dot structure. The front light unit is arranged on one side of the composite light guide module. The first glue layer is located between the display screen and the first light guide layer.

Optionally, in some embodiments of the present application, the refractive index of the second light guide layer is greater than the refractive index of the first light guide layer.

Optionally, in some embodiments of the present application, the refractive index of the first light guiding layer is between 1 and the refractive index of the second light guiding layer, wherein the first light guiding layer may have a refractive index close to 1.

Optionally, in some embodiments of the present application, the dot structure between the first light guide layer and the second light guide layer causes total reflection of light.

Optionally, in some embodiments of the present application, the second light guide layer is polymethyl methacrylate (PMMA) or Polycarbonate (PC).

Optionally, in some embodiments of the present application, the front light unit is an LED.

Optionally, in some embodiments of the present application, the reflective display screen device further includes a color filter layer and a second glue layer. The color filter layer is located between the second light guide layer and the thin film transistor backboard, and the second adhesive layer is located between the color filter layer and the thin film transistor backboard.

Optionally, in some embodiments of the present application, a material of the first Adhesive layer and the second Adhesive layer is Optical Clear Adhesive (OCA) or Optical Clear Resin (OCR).

Optionally, in some embodiments of the present application, the display screen is a mobile phone, a tablet device, or a notebook computer.

Optionally, in some embodiments of the present application, the display screen is a touch panel.

To sum up, this application is through the effectual problem of solving prior art of above-mentioned novel scheme to do not increase too much cost, improved the efficiency of reflective display screen device well under according with economic benefits, provide the better experience of user.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of a reflective display screen device according to the prior art.

Fig. 2 is a schematic diagram of a reflective display screen device according to an embodiment of the present application.

Detailed Description

The disclosure has been described in detail with reference to the following examples, which are intended to be illustrative only, since various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the disclosure, and it is intended that the disclosure encompass all such modifications as fall within the true scope of the disclosure as defined by the appended claims. Throughout the specification and claims, unless the context clearly dictates otherwise, the words "a" and "an" include the word "a" or "an" and the like, including the word "a" or "an" and the word "the component or element. In addition, as used in this disclosure, the singular articles "a," "an," and "the" include plural referents or components unless the context clearly dictates otherwise. Also, as used in this description and throughout the claims that follow, the meaning of "in" may include "in" and "on" unless the content clearly dictates otherwise. The words used in the specification and claims have the ordinary meaning as is accorded to such words in the art, in the context of the disclosure herein and in the specific context unless otherwise indicated. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to the practitioner in describing the disclosure. The use of examples anywhere throughout the specification, including any examples of words discussed herein, is intended merely to be illustrative, and certainly not to limit the scope or meaning of the disclosure or any exemplary words. Likewise, the present disclosure is not limited to the various embodiments set forth in this specification.

As used herein, the term "about" or "approximately" shall generally mean within 20%, and preferably within 10%, of a given value or error. Further, the amounts provided herein can be approximate, meaning that the word "about" or "approximately" can be used if not expressly stated. When an amount, concentration, or other value or parameter is given a range, preferred range or table listing upper and lower desired values, it is to be understood that all ranges formed from any upper and lower pair of values or desired values is specifically disclosed, regardless of whether ranges are separately disclosed. For example, if a range of lengths from X cm to Y cm is disclosed, it should be understood that lengths of H cm are disclosed and H can be any real number in between X and Y.

Further, "electrically coupled" or "electrically connected" herein includes any direct and indirect electrical connection means. For example, if a first device is electrically coupled to a second device, that connection may be through a direct connection, or through an indirect connection via other devices and connections. In addition, if transmission and provision of electrical signals are described, persons skilled in the art should understand that attenuation or other non-ideal changes may be accompanied in the transmission process of electrical signals, but the source and the receiving end of the electrical signal transmission or provision should be regarded as substantially the same signal unless otherwise stated. For example, if an electrical signal S is transmitted (or provided) from a terminal a of an electronic circuit to a terminal B of the electronic circuit, wherein a voltage drop may occur across the source and drain of a transistor switch and/or a possible stray capacitance, but this design is intended to achieve certain specific technical effects without deliberately using attenuation or other non-idealities that occur during transmission, the electrical signal S should be considered to be substantially the same signal at the terminals a and B of the electronic circuit.

It is understood that the terms "including," "having," "containing," and the like, as used herein, are open-ended terms that mean including, but not limited to. Moreover, it is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the title of the invention are provided to assist the searching of patent documents and are not intended to limit the claims of the invention.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In this application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operating state, particularly in the direction of the drawing figures, and the terms "inner" and "outer" refer to the contours of the device.

Refer to the drawings wherein like reference numbers refer to like elements throughout. The following description is based on illustrated embodiments of the invention and should not be taken as limiting the invention with regard to other embodiments that are not detailed herein.

Referring to fig. 1, fig. 1 is a schematic diagram of a reflective display screen device 10 according to the prior art. As shown in fig. 1, the reflective display panel device 10 includes a display panel 1, an Optical Clear Adhesive (OCA) layer 2, a light guide module 3, an Optical Adhesive 4, a color filter layer 5, a Thin Film Transistor (FT) backplane 6, and a light emitting diode 7, wherein a dot structure 8 is disposed on an upper side of the light guide module 3 to increase a light reflection effect. After light emitted by the light emitting diode 7 enters the light guide plate, the total reflection of the light rays is destroyed by the mesh points, the upward light is changed into useful light which is required to go down to the thin film transistor back plate 6, and the thin film transistor back plate 6 further reflects the light source, so that a user watching the device has better brightness in vision. However, after the display screen 1 and the light guide module 3 are assembled, the display screen 1 and the light guide module 3 are attached to the touch screen through the optical adhesive layer 2, and the OCA layer 2 is soft glue, so that dots are filled to cause dot failure or low efficiency, that is, the dots cannot properly generate total reflection of light according to the original design after being filled, as shown in the arrow direction in fig. 1, light forms scattering and cannot be transmitted downwards. This results in the light source that is ultimately emitted to the tft backplane 6 being too dim and not uniform enough to degrade the user experience.

Aiming at the problems in the prior art, the embodiment of the application adopts a novel mesh point design scheme, so that mesh points of the light guide plate are built in, and the problem of low light efficiency caused by filling the mesh points with OCA is solved. And synchronously optimizing the subjective effect. Referring to fig. 2, fig. 2 is a schematic view of a reflective display screen device 20 according to an embodiment of the present disclosure. As shown in fig. 2, the present embodiment provides a reflective display panel device 20 suitable for a terminal device, which includes a display panel 21, a first adhesive layer 22, a composite light guide module 23, a second adhesive layer 24, a color filter layer 25, a Thin Film Transistor (TFT) backplane 26, and a front light unit 27. The TFT backplane 26 is used to reflect light. The composite light guide module 23 is located between the display screen and the thin film transistor backplane, and includes a first light guide layer 23a and a second light guide layer 23 b. The second light guide layer 23b is located between the first light guide layer 23a and the tft backplane, wherein the first light guide layer 23a and the second light guide layer 23b have different refractive indexes, and the first light guide layer 23a and the second light guide layer 23b have a dot structure 28. The front light unit 27 is disposed at one side of the composite light guide module 23 to provide a light source, and the front light unit 27 may be a light emitting diode, but the application is not limited thereto. First glue film 22 is located in the middle of display screen 21 and first leaded light layer 23a, colored filter layer be located second leaded light layer 23b with in the middle of the thin-film transistor backplate, and the second glue film is located colored filter layer 25 with in the middle of the thin-film transistor backplate.

The front light unit 27 is used in conjunction with a reflective display to provide sufficient light to display the image. The front light unit cooperates with the optical structure on the first light guide layer 23a to form total reflection inside the composite light guide module. The optical structures may be of various forms, but the present invention mainly discusses dot structures, and other optical structures for achieving total reflection include prism structures. However, when the light guide plate with the prism structure is applied, a user can often see the wavy or corrugated prism structure, which causes a reduction in display performance, and after light is reflected by the self-reflective display screen and passes through the light guide plate again, the light is refracted in different directions due to different angles of the prism structure, which causes a problem of double images, and meanwhile, strong bright lines are easily generated, which may cause a serious reduction in user experience.

The dot structure can be divided into a printing type and a non-printing type, wherein the printing type is as follows: after finishing the shape processing of the light guide plate, printing the mesh points on the reflecting surface in a printing mode; the non-printing formula is: the mesh points are directly formed on the reflecting surface when the light guide plate is formed. The formation of the dot structure can be further classified into chemical Etching (Etching), precision mechanical lithography (V-cut), photolithography (Stamper), and internal diffusion. The purpose of changing the display effect can be achieved through the size, distribution, regularity and irregularity of the dots, but the invention is not particularly limited to the form of the dot structure and the manufacturing method thereof. In contrast, the present invention is to ensure that the light-emitting surface (i.e., the top surface) of the second light guiding layer 23b is not filled with OCA in the first glue layer 22, so as to ensure that the final light-emitting effect meets the expected design.

Optionally, in some embodiments of the present application, the dot structure 28 between the first light guiding layer 23a and the second light guiding layer 23b causes total reflection of light. In the embodiment of the present application, the refractive index of the second light guiding layer 23b is larger than that of the first light guiding layer 23a, which is a factor constituting total reflection. The refractive index of the first light guide layer 23a is between 1 and the refractive index of the second light guide layer 23 b. Optionally, in some embodiments of the present application, the first light guiding layer 23a may be made of a material having a refractive index close to that of air, that is, the first light guiding layer 23a may have a refractive index close to 1, so that no matter what kind of material is selected for the second light guiding layer 23b, a total reflection effect can be ensured.

The scheme of the front light guide plate adopts the composite light guide module 23 with double-layer composite materials, wherein the refractive index of the second light guide layer 23b is different from that of the first light guide layer 23a, and the top of the first light guide layer 23a which is connected with the first adhesive layer 22 does not have a dot structure, so that the problem that dots are filled by adhesive materials in the prior art is solved. In addition, since the first light guiding layer 23a is solid and not liquid or fluid, the junction between the first light guiding layer 23a and the second light guiding layer 23b does not affect the dot structure 28 on the top of the second light guiding layer 23b, thereby further ensuring the ideal light total reflection effect.

Optionally, in some embodiments of the present disclosure, the second light guiding layer 23b is polymethyl methacrylate (PMMA) or Polycarbonate (PC), and the refractive index of PMMA is 1.49, so that it can be ensured that most of the light of the lower layer reflects the optical effect emitted downward, and the effective utilization rate is improved. PMMA, also known as Acrylic or plexiglass, has the advantages of high transparency, low cost, easy machining, etc., and is a commonly used substitute material for glass.

PMMA has the property of high light transmittance, and the following is the light transmittance behavior of PMMA with respect to light of different wavelengths:

(1) for visible light, PMMA is the most excellent high-molecular transparent material at present, and the light transmittance reaches 92 percent and is higher than that of glass.

(2) For ultraviolet light, quartz can completely filter ultraviolet rays, but the cost is high, and common glass only allows 0.6 percent of the ultraviolet rays to pass through. Compared with the PMMA, the PMMA can effectively filter the ultraviolet rays with the wavelength less than 300 nm. On the other hand, PMMA has better stability under irradiation with ultraviolet light than polycarbonate.

(3) PMMA allows Infrared (IR) at wavelengths less than 2800nm to pass through for Infrared light. In addition, the special color PMMA is transparent to a specific wavelength IR while blocking visible light (for remote control or thermal sensing, etc.).

In addition to the above properties, PMMA has a lower density than glass, and PMMA has a density of about 1.15-1.19g/cm3, which is about half that of glass (2.40-2.80g/cm 3). PMMA has higher mechanical strength, the relative molecular mass of PMMA is about 200 ten thousand, PMMA is a long-chain high-molecular polymer, and a formed molecular chain is very soft, so that the strength of PMMA is higher, and the tensile resistance and the impact resistance of PMMA are 7-18 times higher than those of common glass. In addition, PMMA has a relatively low melting point, about 130-140 ℃, which is much lower than the melting point of glass, about 1000 ℃.

In addition to PMMA, polycarbonate may be used for the second light guide layer 23 b. The polycarbonate has the chemical properties of polycarbonate, acid resistance, oil resistance, ultraviolet resistance and strong alkali resistance, and the physical properties of polycarbonate are colorless, transparent, heat resistance, impact resistance and flame retardance, and has good mechanical properties at common use temperature. Polycarbonate has better impact resistance and higher refractive index than PMMA, which has similar properties. The polycarbonate has the characteristics of high light transmittance, high refractive index, high impact resistance, dimensional stability, easiness in processing and forming and the like, and occupies an important position in the optical field. The optical lens prepared by optical grade polycarbonate can be used in the fields of cameras, microscopes, telescopes, optical testing instruments and the like, film projector lenses, copier lenses, infrared automatic focusing projector lenses, laser beam printer lenses, various office equipment and household appliances such as various prisms, multi-surface reflectors and the like, and has a wide application range.

Optionally, in some embodiments of the present application, a material of the first adhesive layer and the second adhesive layer is Optical Clear Resin (OCR).

Optionally, in some embodiments of the present application, the display screen 21 is a touch panel. In some embodiments, the display screen 21 may be a non-touch panel.

Regarding the Color filter layer 25, generally, the Color filter is a key component for colorizing the LCD, and the Full Color (Full Color) of the LCD with high gray scale can be achieved only by passing through the Color filter, which also plays an important role in the manufacture of the LCD. The color filter mainly comprises a Glass Substrate (Glass Substrate) as a carrier, a black matrix, a color photoresist, a protective film and an ITO conductive film. The glass used by the color filter of the TFT-LCD adopts alkali-free and low-expansion glass so as to meet the requirement of high yield in the manufacturing process.

Optionally, in some embodiments of the present application, the display screen 21 is a screen of an electronic product such as a smart phone, a tablet computer, and a notebook computer, but the present application is not limited thereto. The inventive concept of the present application may also be extended to Electronic devices such as Electronic Paper display screens (Electronic Paper panels). Specifically, although only the reflective LCD is described in the embodiments of the present application, the method of ensuring total reflection is adopted by other electronic screen products without backlight. The refreshing of the electronic paper display screen is discontinuous, the current graph can be kept after each refreshing, the electronic paper display screen can always display the final picture even if the battery is not electrified, and the picture cannot be restored or enter a random chaotic state but keep the final state even if the battery is not electrified because the electronic paper display screen has the bistable hysteresis effect. In summary, the active reflective display technology of the embodiment of the present invention is substantially different from the electronic paper display screen in the following differences:

(1) compared with an LCD display screen, the electronic paper display screen can display contents without continuous refreshing, so that power consumption and radiation are reduced.

(2) Regardless of a mobile phone or a computer, multimedia contents required to be displayed are abundant, and operations such as popup menus and window scrolling are required, so that the refresh rate of an electronic paper display screen is obviously insufficient to meet the requirements. Compared with the LCD display screen, the electronic paper display screen is more suitable for character display with simple content and less change.

To sum up, this application is through the effectual solution of above-mentioned novel scheme to do not increase too much cost, having improved the efficiency of reflective display screen device well under according with economic benefits, provide the better experience of user. More specifically, the scheme of the front light guide plate adopts a composite light guide module with double layers of composite materials, and the two layers of composite materials adopt different refractive indexes, so that a mesh point structure between the two layers of composite materials can not be filled by glue, and an ideal light total reflection effect can be better brought. After the total reflection effect is ensured, the intensity and the direction of the light can be properly controlled, so that the design of the front light unit can provide good reading comfort for users.

In addition, the terminal product provided by the invention has the advantages of light and thin body and low power consumption (compared with the traditional LCD product), and the active reflective display technology reduces the traditional backlight structure, thereby not only reducing the weight and thickness of the module, but also greatly reducing the power consumption of the display screen. Compared with a common display screen product, the reflective display product can reduce the thickness of the whole product by more than 35% and reduce the weight of the whole product by more than 40%. In addition, because the active reflective display technology of the invention has no backlight structure, the overall power consumption can be reduced by 60-90% under the condition that the front light unit adopts the LED.

In addition, since the light source used in the reflective display technology of the present invention is mainly a reflective ambient light or a reflective front light unit, the blue light hazard is lower compared to the conventional products. In addition, the backlight and the OLED display are difficult to read in direct sunlight, and the reflective display technology does not resist sunlight by the reflection principle of ambient light, and the design with the front light unit can also provide reading in a dark environment. On the other hand, the power consumption saving effect of the reflective display technology of the invention can realize products such as an ultra-long standby mobile device or a low-power electronic advertisement column.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. The embodiments described above are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present application, except for the design of the embodiments in the present application, which is consistent with the embodiments in the present application, belong to the protection scope of the present application.

The reflective display screen device applied to the terminal device provided in the embodiment of the present application is described in detail above, and a specific example is applied in the description to explain the principle and the implementation of the present application. Those of ordinary skill in the art will understand that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, without departing from the scope of the technical solutions of the embodiments of the present application.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

The reflective display screen device applied to the terminal device provided in the embodiments of the present application is described in detail above, and the principles and embodiments of the present application are explained herein by applying specific examples, and the description of the above embodiments is only used to help understand the method and the core idea of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be a change in the specific implementation and application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A reflective display screen device, comprising:

a display screen; and

the thin film transistor back plate is used for reflecting light;

the compound light guide module is located the display screen with in the middle of the thin film transistor backplate, and includes:

a first light guide layer; and

the second light guide layer is positioned between the first light guide layer and the thin film transistor back plate, the second light guide layer of the first light guide layer has different refractive indexes, and the second light guide layer of the first light guide layer has a dot structure;

the front light unit is arranged on one side of the composite light guide module; and

the first glue layer is positioned between the display screen and the first light guide layer.

2. The reflective display screen device of claim 1, wherein the second light guide layer has a refractive index greater than the refractive index of the first light guide layer.

3. The reflective display screen device of claim 2, wherein the first light guide layer has a refractive index between 1 and the refractive index of the second light guide layer.

4. The reflective display device of claim 1, wherein the dot structure intermediate the first light guiding layer and the second light guiding layer causes total reflection of light.

5. The reflective display screen device of claim 1, wherein the second light guiding layer is polymethylmethacrylate or polycarbonate.

6. A reflective display screen device according to claim 1 wherein the front light unit is a light emitting diode.

7. The reflective display screen device of claim 1, wherein the reflective display screen device further comprises:

the color filter layer is positioned between the second light guide layer and the thin film transistor back plate; and

and the second adhesive layer is positioned between the color filter layer and the thin film transistor backboard.

8. The reflective display screen device of claim 7, wherein the first adhesive layer and the second adhesive layer are made of optical glue or optical mastic.

9. The reflective display screen device of claim 1, wherein the display screen is a cell phone, a tablet device, or a notebook computer.

10. The reflective display screen device of claim 1, wherein the display screen is a touch panel.