Upper cover plate structure and plasma display module

Abstract

The present invention relates to the field of electronic paper display technology, and specifically relates to an upper cover plate structure, comprising: a first substrate, a filter layer being arranged on the surface of the first substrate; the filter layer comprises multiple color filters arranged as spaced apart, where gaps are formed between adjacent color filters; reflective structures are provided on the surfaces of the color filters away from the first substrate; conductive dielectric layers are arranged on the surfaces of the reflective structures away from the color filters and on surfaces of the gaps; and insulating guide layers are filled within the gap notches and are located on the surface of the conductive dielectric layers. By means of arranging the insulating guide layers as surrounding the color filters and arranging said layers on the conductive dielectric layers, the color filters consequently align with pixel electrodes to form a directly vertically oriented electric field and eliminates obliquely oriented electric fields. The present invention improves screen reflectivity and display contrast.

Description

A top cover structure and a plasma display module Technical Field

[0001] This invention relates to the field of electronic paper display technology, specifically to a top cover structure and a plasma display module. Background Technology

[0002] The existing plasma display structure mainly consists of an upper glass substrate, a filter, an ITO layer and a plasma barrier, pixel electrodes and a lower substrate from top to bottom. The pixel electrodes on the surface of the lower substrate are square, while the ITO layer on the surface of the upper substrate is a whole and covers the upper substrate. As a result, an oblique electric field is generated on the pixel electrodes and the upper ITO cover, which leads to excessive pixel edge ghosting and reduced refresh life. How to weaken or eliminate the oblique electric field has become an urgent problem to be solved. Summary of the Invention

[0003] This invention provides a top cover structure and a plasma display module to reduce or eliminate the problem of oblique electric field in the prior art.

[0004] One technical solution of the present invention is as follows: a top cover structure includes: a first substrate, a filter layer disposed on the surface of the first substrate, the filter layer including a plurality of spaced color filters, a gap formed between adjacent color filters, a reflective structure disposed on the surface of the color filters opposite to the first substrate, a conductive dielectric layer disposed on the surface of the reflective structure opposite to the surface of the color filters and the gap, an insulating guiding layer filling the gap, and the insulating guiding layer being located on the surface of the conductive dielectric layer.

[0005] Furthermore, the reflective structure includes multiple micro-reflective units, which are uniformly arranged on the surface of each color filter. The lower surface of each micro-reflective unit is an arc surface that bulges away from the color filter.

[0006] Furthermore, the insulating guide layer is made of silicon nitride.

[0007] Furthermore, the insulating guide layer is spaced apart from or in contact with the color filter.

[0008] Another technical solution of the present invention is as follows: a plasma display module, comprising a second substrate and any of the above-described upper cover plate structures, wherein the second substrate is disposed opposite to the first substrate, a plasma display cavity is formed between the first substrate and the second substrate, the plasma display cavity is filled with plasma particles, a pixel electrode layer is disposed on the surface of the second substrate facing the first substrate, and a plasma isolation structure extending toward the first substrate is disposed on the pixel electrode layer.

[0009] Furthermore, the end of the plasma isolation structure facing away from the second substrate abuts against the insulating guide layer.

[0010] Furthermore, the pixel electrode layer includes a plurality of pixel electrodes arranged in an array, with a gap formed between two adjacent pixel electrodes, the insulating guide layer facing the gap, and the plasma isolation structure covering the gap.

[0011] Furthermore, a support structure is provided inside the plasma display cavity.

[0012] Furthermore, the support structure includes support microspheres, which are supported between the reflective structure and the pixel electrode layer.

[0013] Furthermore, the cross-sectional shape of the plasma isolation structure includes a trapezoid.

[0014] The beneficial effects of the present invention are as follows: By surrounding the color filter with an insulating guide layer and placing the insulating guide layer on the surface of the conductive dielectric layer, the present invention enables the color filter to correspond with the pixel electrode, forming a straight up-down electric field, which weakens or eliminates the oblique electric field, reduces pixel ghosting, and improves screen reflectivity and display contrast. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the upper cover plate structure in this invention.

[0016] Figure 2 is a cross-sectional structural diagram of the plasma display module in this invention.

[0017] Figure 3 is a comparative schematic diagram of the electric field without the structure of the present invention and the electric field with the structure of the present invention. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0019] In one technical solution of the present invention, Figure 1 is a structural schematic diagram of a specific structure of an upper cover plate according to the present invention. As shown in Figures 1 and 2, the present invention specifically includes:

[0020] A first substrate 110 has a filter layer 120 disposed on its surface. The filter layer 120 includes a plurality of spaced color filters 121, including but not limited to RGB three-color filters.

[0021] A gap 130 is formed between adjacent color filters 121. A reflective structure 150 is provided on the surface of the color filter 121 facing away from the first substrate 110. A conductive dielectric layer 140 is provided on the surface of the reflective structure 150 facing away from the surface of the color filter 121 and the gap 130. An insulating guiding layer 160 is filled in the gap 130, and the insulating guiding layer 160 is located on the surface of the conductive dielectric layer 140. The first substrate may be a glass substrate.

[0022] An insulating guide layer is disposed on the surface of the conductive dielectric layer and surrounds the color filter 121, so that the area where the color filter 121 is located corresponds to the pixel electrode on the surface of the lower cover plate to form a vertical electric field, as shown in Figure 3, thereby improving the display effect.

[0023] The preferred material for the insulating guide layer is silicon nitride (SiNx), but those skilled in the art can also select from insulating materials according to actual needs.

[0024] In one embodiment of this technical solution, the reflective structure 150 includes a plurality of micro-reflective units 151, which are uniformly arranged on the surface of each color filter 121. The lower surface of each micro-reflective unit 151 is an arc surface that bulges in a direction away from the color filter 121.

[0025] The reflective structure can be made of optical-grade acrylic resin, transparent polymer, transparent inorganic material, transparent composite material, etc., which have good reflective properties. Among them, optical-grade acrylic resin can improve the reflective brightness and color saturation by 30%.

[0026] Specifically, light incident from the direction of the first substrate 110 can be reflected at the micro-reflective unit 151. In addition, the micro-reflective unit 151 can also uniformly disperse plasma particles in the plasma display area. The micro-reflective unit 151 is hemispherical and can be implemented by spin coating, optical etching, thermal curing or photocuring.

[0027] In one embodiment of this technical solution, the insulating guide layer 160 is in contact with the color filter 121, meaning the insulating guide layer completely fills the gap 130. This arrangement effectively improves the color saturation of the plasma display screen. Another arrangement is that the insulating guide layer 160 and the color filter 121 are spaced apart, meaning a certain gap remains between them. This arrangement effectively improves the screen reflectivity, and is considered the optimal arrangement.

[0028] In another technical solution of the present invention, Figure 2 is a cross-sectional structural diagram of a plasma display module. As shown in Figure 2, it specifically includes: a second substrate 210 and any of the above-described upper cover plate structures. The second substrate 210 is disposed opposite to the first substrate 110, and a plasma display cavity is formed between the first substrate 110 and the second substrate 210. The plasma display cavity is filled with plasma particles, wherein the plasma particles include white particles 310 and black particles 320. As shown in Figure 2, the darker color represents the plasma black particles, and the lighter color represents the plasma white particles. It should be understood that the plasma particles 320 may also include two-color, three-color, or multi-color pigment particles, which can be selected as needed and are not limited here.

[0029] A pixel electrode layer 220 is disposed on the surface of the second substrate 210 facing the first substrate 110, and a plasma isolation structure 230 extending toward the first substrate 110 is disposed on the pixel electrode layer 220. The second substrate may be a TFT thin film transistor or a thin film transistor glass substrate.

[0030] Simultaneously, an isolation layer can be provided on the surface of the pixel electrode layer 220 facing the first substrate 110. The isolation layer is used to isolate the pixel electrode layer from the plasma display cavity, preventing the pixel electrode from directly contacting the plasma, which can significantly improve the refresh life. At the same time, the isolation layer can make the pixel electrode layer flatter, making it easier to set up the plasma isolation structure. The isolation layer can be made of PI polyimide material.

[0031] In one embodiment of this technical solution, the end of the plasma isolation structure 230 facing away from the second substrate 210 abuts against the insulating guide layer 160. The plasma isolation structure 230 is a trapezoidal structure extending from the pixel electrode layer 220 to the filter layer 120, with a trapezoidal cross-sectional shape, primarily serving to isolate plasma particles. The abutment of the insulating guide layer 160 with the plasma isolation structure provides support for the upper and lower substrates, increasing the overall structural strength of the display screen, reducing plasma movement, and minimizing deformation of the upper and lower cover plates caused by external forces, thus improving overall compressive strength.

[0032] In one embodiment of this technical solution, the pixel electrode layer includes a plurality of pixel electrodes 221 arranged in an array, a gap is formed between two adjacent pixel electrodes 221, the insulating guide layer 160 faces the gap, and the plasma isolation structure 230 covers the gap.

[0033] In one embodiment of this technical solution, a support structure is provided inside the plasma display cavity, which is not shown in the figure. Specifically, the support structure may be a support microsphere. The support structure includes support microspheres, which are supported between the reflective structure 150 and the pixel electrode layer 220. The support microspheres mainly play a supporting and fixing role, improving the screen's resistance to pressure, so that when the screen is pressed during display, the image will not be blurred or distorted, thus improving the stability of the displayed image.

[0034] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A top cover structure, characterized in that, include: A first substrate (110) has a filter layer (120) disposed on its surface. The filter layer (120) includes a plurality of spaced color filters (121). A gap (130) is formed between adjacent color filters (121). A reflective structure (150) is disposed on the surface of the color filter (121) facing away from the first substrate (110). A conductive dielectric layer (140) is disposed on the surface of the reflective structure (150) facing away from the surface of the color filter (121) and the gap (130). An insulating guide layer (160) is filled in the gap (130). The insulating guide layer (160) is located on the surface of the conductive dielectric layer (140).

2. The upper cover structure as described in claim 1, characterized in that, The reflective structure (150) includes a plurality of micro-reflective units (151), which are evenly arranged on the surface of each color filter (121). The lower surface of each micro-reflective unit (151) is an arc surface that bulges in a direction away from the color filter (121).

3. The upper cover structure as described in claim 1, characterized in that, The insulating guide layer (160) is made of silicon nitride.

4. The upper cover structure as described in claim 1, characterized in that, The insulating guide layer (160) is spaced apart from or in contact with the color filter (121).

5. A plasma display module, characterized in that, The device includes a second substrate (210) and a top cover structure as described in any one of claims 1-4. The second substrate (210) is disposed opposite to the first substrate (110). A plasma display cavity is formed between the first substrate (110) and the second substrate (210). The plasma display cavity is filled with plasma particles. A pixel electrode layer (220) is disposed on the surface of the second substrate (210) facing the first substrate (110). A plasma isolation structure (230) extending toward the first substrate (110) is disposed on the pixel electrode layer (220).

6. The plasma display module as described in claim 5, characterized in that, The plasma isolation structure (230) abuts against the insulating guide layer (160) at one end away from the second substrate (210).

7. The plasma display module as described in claim 5, characterized in that, The pixel electrode layer includes a plurality of pixel electrodes (221) arranged in an array, with a gap formed between two adjacent pixel electrodes (221), the insulating guide layer (160) facing the gap, and the plasma isolation structure (230) covering the gap.

8. The plasma display module as described in claim 5, characterized in that, A support structure is provided inside the plasma display cavity.

9. The plasma display module as described in claim 8, characterized in that, The support structure includes a support microsphere supported between the reflective structure (150) and the pixel electrode layer (220).

10. The plasma display module as described in claim 5, characterized in that, The cross-sectional shape of the plasma isolation structure (230) includes a trapezoid.

Images