Self-luminous electronic paper screen assembly and electronic device

Abstract

The application discloses a self-luminous electronic paper screen assembly, which comprises an illumination layer and an electronic paper functional layer, wherein the illumination layer is above the electronic paper functional layer; the electronic paper functional layer comprises a TFT layer, an ink capsule layer and an electrode layer; the illumination layer comprises a light-emitting part, a light-transmitting window part and a light-emitting part driving electrode part; the light-emitting part driving electrode part is arranged adjacent to the light-transmitting window part; the light-emitting part comprises an OLED light-emitting body, which is driven to light up by the light-emitting part driving electrode part; the OLED light-emitting body emits light, which irradiates ink capsules of the ink capsule layer and is emitted out through the light-transmitting window part. The application provides illumination for the electronic paper by adding the illumination layer on the surface of the electronic paper and adopting the OLED light-emitting mechanism, and provides a color electronic paper display device which can still present clear images under insufficient light conditions through the innovative front light structure design.

Description

Technical Field

[0001] This application belongs to the field of display technology, specifically relating to self-emissive electronic paper screen components. Background Technology

[0002] Electronic paper ink displays feature ultra-low power consumption, low-frequency display, and energy saving, and have a wide range of applications in price tags, advertising signs, bus stop signs, and other fields.

[0003] In existing technologies, two-color electronic paper encapsulates black and white charged particles within the same capsule structure, while three-color electronic paper encapsulates three charged particles of different colors (black, white, and red, or black, white, and yellow) within the same microcup structure. An external electric field controls the rising and falling movement of the black, white, and red particles with different charges to display black, white, and red, or black, white, and yellow colors. However, such color combinations clearly cannot meet the demand for richer color displays.

[0004] Electronic paper display technology, with its paper-like visual effect and low power consumption, is widely used in e-reading, electronic tags, and other fields. However, in low-light environments, the characteristic of electronic paper relying on ambient light reflection for display, especially for color filter-based electronic paper, leads to a significant decrease in image clarity and readability, severely restricting its application in scenarios such as nighttime and low-light indoor environments, necessitating an effective solution.

[0005] Definitions: EPD is an abbreviation for "electronic paper display".

[0006] TFT is an abbreviation for "Thin Film Transistor". In this application, it means that each pixel on the display is driven by a thin film transistor integrated behind it, thereby enabling high-speed, high-brightness, and high-contrast display of screen information.

[0007] ITO is an abbreviation for "Indium Tin Oxide". In this application, electronic paper ITO refers to the transparent conductive film shielding glass whose conductive film layer material is mainly ITO (Indium Tin Oxide Semiconductor) film. Summary of the Invention

[0008] The technical problem addressed by this application is to solve the issue that low-light environments lead to a significant decrease in image clarity and readability, severely restricting its application in scenarios such as nighttime and low-light indoor environments. This application provides a color electronic paper display device that can still present clear images under insufficient light conditions by adding an illumination layer to the surface of the electronic paper and employing the light-emitting mechanism of OLEDs. Through an innovative front-light structure design, this application provides a device that can display clear images even under insufficient light conditions.

[0009] A self-emissive electronic paper screen assembly includes: an illumination layer and an electronic paper functional layer; the illumination layer is located above the electronic paper functional layer; the electronic paper functional layer includes a TFT layer, an ink capsule layer, and an electrode layer; the illumination layer includes a light-emitting portion, a light-transmitting window portion, and a light-emitting portion driving electrode portion; the light-emitting portion driving electrode portion and the light-transmitting window portion are arranged adjacent to each other; the light-emitting portion includes an OLED light-emitting element, which is driven and illuminated by the light-emitting portion driving electrode portion; the OLED light-emitting element emits light, illuminating the ink capsule of the ink capsule layer, and the reflected light is emitted through the light-transmitting window portion.

[0010] Yes, the aforementioned light-transmitting window portion can be a transparent window.

[0011] Yes, the aforementioned translucent window portion can be a colored, semi-transparent window.

[0012] It is possible that the aforementioned light-transmitting window portion is an array of colored films.

[0013] It is possible that the aforementioned color filter includes a red filter, a green filter, and a blue filter, and the aforementioned red filter, green filter, and blue filter are arranged in an alternating array.

[0014] It is possible that the electrode layer of the electronic paper functional layer includes a pixel electrode layer and a common electrode layer; the light-emitting part driving electrode layer includes a light-emitting driving electrode part; and the illumination layer and the electronic paper functional layer share the common electrode layer.

[0015] It is permissible that the aforementioned light-emitting driving electrode portion is black.

[0016] It is possible that the light-emitting driving electrode is composed of a transparent ITO coating.

[0017] It may also include a light-emitting part reflecting part, which covers the light-emitting driving electrode part and reflects the light emitted by the light-emitting part.

[0018] It may also include a light-emitting part shielding part, which covers the light-emitting part and shields the light emitted by the light-emitting part.

[0019] An electronic device includes the aforementioned self-illuminating electronic paper screen assembly.

[0020] One of the beneficial effects of the technical solution in this application is that it provides a color electronic paper display device that can still present a clear image under insufficient light conditions.

[0021] One of the beneficial effects of the technical solution in this application is that OLED materials have self-emissive properties and are well-integrated as front light sources.

[0022] One of the beneficial effects of the technical solution in this application is that the non-transparent electrode also has a light-shielding effect, reducing the impact of self-emission on display contrast.

[0023] One of the beneficial effects of the technical solution in this application is that the light-emitting part shields the light emitted by the light-emitting part, which can prevent light leakage and affect vision.

[0024] One of the beneficial effects of the technical solution in this application is that the reflective part can reflect light and improve the utilization rate of light. Attached Figure Description

[0025] Figure 1 This is a cross-sectional structural diagram of Example 1; Figure 2 This is a top view of the structure of Embodiment 1; Figure 3 This is a top view of the structure of Embodiment 2; Figure 4 This is a cross-sectional structural diagram of Example 3; Figure 5 This is a cross-sectional structural diagram of Example 4; Figure 6 This is a top view of Example 4; Figure 7 This is a cross-sectional structural diagram of Example 5. Detailed Implementation

[0026] The embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0027] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and technical features numbered with Arabic numerals 1, 2, 3, etc., and designations such as "A" and "B," are used for descriptive purposes only, for ease of explanation, and do not represent a temporal or spatial order; they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first," "second," and numbered with Arabic numerals 1, 2, 3, etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "several" means two or more, unless otherwise expressly and specifically defined.

[0028] It should be noted that the following description of preferred embodiments of this application does not constitute any limitation on this application. The description of preferred embodiments is merely an illustration of the general principles of this application. The embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] This application aims to overcome the shortcomings of existing electronic paper display devices in low-light environments by providing a color electronic paper display device that can still present clear images under insufficient light conditions through an innovative front light structure design.

[0030] like Figure 1 A cross-sectional structural diagram of Example 1.

[0031] like Figure 1 A self-emissive electronic paper screen assembly includes an illumination layer 0110 and an electronic paper functional layer 0120. The illumination layer is above the electronic paper functional layer, which includes a TFT layer 0121, an ink capsule layer 0122, and an electrode layer; the illumination layer includes a light-emitting part 0111, a light-transmitting window part 0112, and a light-emitting part driving electrode part 0113.

[0032] like Figure 2 The top view of Embodiment 1 shows the structure. The light-emitting part driving electrode part 0113 and the light-transmitting window part 0112 are arranged adjacent to each other.

[0033] The light-emitting part driving electrode section 0113 and the light-transmitting window section 0112 are arranged adjacent to each other. The light-emitting part includes an OLED light emitter, which is driven and lit by the light-emitting part driving electrode section. The OLED light emitter emits light, which illuminates the ink capsule 0130 of the ink capsule layer, and the reflected light is emitted through the light-transmitting window section.

[0034] The light-emitting part uses organic light-emitting diodes (OLEDs), which have self-emissive properties and can be used as a front light source. The OLED light-emitting layer is electrically connected to the cathode (e.g., a transparent electrode) and the anode (e.g., a transparent electrode or a non-transparent electrode), enabling precise light emission based on control signals. The non-transparent electrode also has a light-shielding function, reducing the impact of self-emission on display contrast.

[0035] like Figure 3 The top view of the structure of Example 2.

[0036] This can be achieved by setting the part of the window that allows light to pass through to a transparent window. For example... Figure 3 As shown, the light-emitting part driving electrode part 0313 and the light-transmitting window part 0312 are arranged adjacent to each other and are in a transparent or semi-transparent state.

[0037] like Figure 3 The aforementioned light-transmitting window portion is a colored, semi-transparent window.

[0038] like Figure 1 The electrode layer of the electronic paper functional layer includes a pixel electrode layer 0141 and a common electrode layer 0142; the light-emitting part driving electrode layer includes a light-emitting driving electrode part 0113; and the illumination layer and the electronic paper functional layer share the common electrode layer 0142.

[0039] like Figure 1 It is possible that the light-emitting driving electrode part 0113 mentioned above is black.

[0040] It is possible that the light-emitting driving electrode is composed of a transparent ITO coating.

[0041] like Figure 4 , Schematic diagram of cross-sectional structure of Example 3.

[0042] like Figure 4 It includes a light-emitting part and a reflective part 0410, which covers the light-emitting driving electrode part 0411 and reflects the light emitted by the light-emitting part 0413.

[0043] like Figure 4 It also includes a light-emitting part shielding part 0420, a light-emitting driving electrode part 0421 that is made of transparent ITO, and the light-emitting part shielding part covers the light-emitting part 0430 and shields the light emitted by the light-emitting part.

[0044] like Figure 5 , Schematic diagram of cross-sectional structure of Example 4.

[0045] like Figure 5 The light-transmitting window portion consists of an array of colored films; the colored films include a red film 0510, a green film 0520, and a blue film 0530. A transparent protective layer 0550 is also included on the surface.

[0046] like Figure 6 A top view of Example 4.

[0047] The red, green, and blue membranes are arranged in an alternating array.

[0048] like Figure 7 The cross-sectional structural diagram of Example 5 is shown. The light emitted by the light-emitting part 0620 is reflected by the light-emitting part reflector 0630 onto the ink capsule. After being reflected by the ink capsule, it is emitted through the color filter. When the black particles in the ink capsule are on top, the light is absorbed, and the light emitted through the color filter is reduced. In this way, color display can be achieved.

[0049] Under normal lighting conditions, electronic paper displays rely on ambient light reflection. In low-light environments, the OLED white emitting layer is activated via circuit control, emitting uniform light that penetrates the transparent cathode electrode to illuminate the electronic paper capsule film. Charged particles within the electronic paper capsule film redistribute under the influence of the electric fields of the common electrode and pixel electrode, reflecting light. Combined with color filters that filter different colors of light, this results in a clear color image display.

[0050] The technology of this application improves environmental adaptability: by using the built-in OLED front light structure, the display problem in low light environment can be effectively solved, significantly expanding the application scenarios of electronic paper display, such as night reading and electronic signs in underground parking lots.

[0051] Using the technology of this application, display quality is optimized: the OLED light-emitting layer provides stable and uniform illumination, making the colors of the electronic paper display more accurate, the contrast higher, and the details clearer, thus improving the user's visual experience.

[0052] OLED materials can be selected from efficient white organic light-emitting material systems, and white light emission can be achieved by doping different proportions of red, green and blue light-emitting materials.

[0053] Transparent and non-transparent electrode anodes are sequentially deposited on the color filter substrate using vacuum evaporation or solution treatment processes. The two electrodes are in ohmic contact to ensure conductivity, while also providing good transparency in the light-transmitting area and light-shielding properties in the non-light-transmitting area.

[0054] An OLED white emitting layer is prepared on a non-transparent electrode anode using vacuum thermal evaporation or organic vapor deposition technology, and the emitting area is precisely defined by photolithography.

[0055] Color filters are fabricated using photolithography and staining processes, precisely fabricated on the left and right sides of the white light-emitting layer to ensure accurate color filtering and display.

[0056] A transparent electrode cathode with a white luminescent layer is deposited sequentially using vacuum evaporation or solution treatment processes. The transparent electrode cathode can be a whole surface or an independent electrode, and this application does not impose any restrictions.

[0057] The color filter and electronic paper module are bonded together. Since all white light-emitting layers emit light simultaneously when working, and the top layer of the electronic paper film is a transparent common electrode covering the entire surface, the transparent cathode electrode of the white light-emitting layer can be reused with the transparent common electrode of the electronic paper film, reducing the module thickness and saving processes.

[0058] The brightness and on / off state of the OLED white emitting layer can be controlled via the driving circuit. An ambient light sensor monitors the ambient light intensity in real time; when the light level falls below a set threshold, the OLED front light is automatically activated, and the driving signal is adjusted to optimize the electronic paper display effect.

[0059] like Figures 1 to 7 As shown, the above description is only an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of the application specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A self-emissive electronic paper screen assembly, characterized in that, include: Illumination layer, electronic paper functional layer; The illumination layer is located above the electronic paper functional layer; The functional layers of electronic paper include a TFT layer, an ink capsule layer, and an electrode layer; The illumination layer includes a light-emitting part, a light-transmitting window part, and a light-emitting part driving electrode part; the light-emitting part driving electrode part and the light-transmitting window part are arranged adjacent to each other; The light-emitting part includes an OLED light-emitting element, which is driven to light up by the light-emitting part driving electrode part; The OLED emitter emits light, which illuminates the ink capsule of the ink capsule layer, and the reflected light is emitted through the light-transmitting window.

2. The self-emissive electronic paper screen assembly according to claim 1, characterized in that, The light-transmitting window portion is a transparent window.

3. The self-emissive electronic paper screen assembly according to claim 1, characterized in that, The light-transmitting window portion is a colored, semi-transparent window.

4. The self-emissive electronic paper screen assembly according to claim 1, characterized in that, The light-transmitting window portion is an array of colored films.

5. The self-emissive electronic paper screen assembly according to claim 4, characterized in that, The color filter includes a red film, a green film, and a blue film, which are arranged in an alternating array.

6. The self-emissive electronic paper screen assembly according to claim 1, characterized in that, The electrode layers of the electronic paper functional layer include the pixel electrode layer and the common electrode layer; The light-emitting part driving electrode layer includes a light-emitting driving electrode part, and the illumination layer and the electronic paper functional layer share the common electrode layer.

7. The self-emissive electronic paper screen assembly according to claim 6, characterized in that, The light-emitting driving electrode is black.

8. The self-emissive electronic paper screen assembly according to claim 6, characterized in that, The light-emitting driving electrode is composed of a transparent ITO coating.

9. The self-emissive electronic paper screen assembly according to claim 8, characterized in that, It also includes a light-emitting part reflecting part, which covers the light-emitting driving electrode part and reflects the light emitted by the light-emitting part; or it also includes a light-emitting part shielding part, which covers the light-emitting part and shields the light emitted by the light-emitting part.

10. An electronic device, characterized in that, Includes the self-illuminating electronic paper screen assembly according to any one of claims 1 to 9.

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