CN222145384U - Projection device - Google Patents

Abstract

The utility model discloses a projection device which comprises a light source, a liquid crystal panel and a lens, wherein the liquid crystal panel comprises an array substrate, a color film substrate and a liquid crystal molecular layer, the color film substrate is positioned between the array substrate and the light source, a substrate of the color film substrate is provided with a first surface and a second surface which are opposite, the first surface faces the light source, the second surface faces the array substrate, the first surface is provided with an APCF layer and a first polarizing layer, the APCF layer is positioned between the light source and the first polarizing layer, the APCF layer is consistent with a transmission axis of the first polarizing layer, the second surface is provided with a first metal layer and a color resistance layer, the color resistance layer comprises a plurality of color resistance blocks, the first metal layer is provided with a plurality of hollow areas which are arranged in an array, the plurality of color resistance blocks are correspondingly positioned in the hollow areas, and light emitted by the light source is transmitted to the lens after sequentially passing through the liquid crystal panel. The utility model can improve the penetration rate of the liquid crystal panel in the projection device and improve the user experience.

Description

Projection device

Technical Field

The present disclosure relates to projection display, and particularly to a projection device.

Background

Currently, a projector uses a liquid crystal panel as an image source to display and project a picture. The projector can comprise a light source, a liquid crystal panel and a lens, wherein the liquid crystal panel comprises an array substrate and a color film substrate of a box. Light emitted by the light source passes through the liquid crystal panel and then enters the lens, so the liquid crystal panel is a key influencing factor of projection performance of the projector. The transmittance of the current liquid crystal panel is insufficient, and the use and specification requirements of the projector market cannot be met. Therefore, how to increase the transmittance of the liquid crystal panel for the projector is one of the problems to be solved in the industry.

Disclosure of utility model

It is therefore an object of the present utility model to provide a projection apparatus to solve the foregoing problems.

In order to achieve the above object, the present utility model provides a projection apparatus, which includes a light source, a liquid crystal panel, and a lens. The liquid crystal panel comprises an array substrate, a color film substrate and a liquid crystal molecular layer, wherein the array substrate is arranged opposite to the color film substrate, the liquid crystal molecular layer is clamped between the color film substrate and the array substrate, the color film substrate is positioned between the array substrate and the light source, a substrate of the color film substrate is provided with a first surface and a second surface which are opposite to each other, the first surface faces the light source, the second surface faces the array substrate, the first surface is provided with an APCF layer and a first polarizing layer, the APCF layer is positioned between the light source and the first polarizing layer, the APCF layer is consistent with a transmission axis of the first polarizing layer, the second surface is provided with a first metal layer and a color resistance layer, the color resistance layer comprises a plurality of color resistance blocks, the first metal layer is provided with a plurality of hollow areas which are arranged in an array, the color resistance blocks are correspondingly positioned in the hollow areas, and light emitted by the light source is transmitted to the lens after passing through the liquid crystal panel.

As an alternative technical scheme, the first metal layer is a molybdenum layer.

As an alternative solution, the first metal layer has a first thickness, and the plurality of color blocks has a second thickness, where the first thickness is not greater than the second thickness.

As an optional technical scheme, the color film substrate is further provided with a black matrix layer, the black matrix layer covers the first metal layer, and the black matrix layer overlaps with the projection of the first metal layer on the color film substrate.

As an optional technical scheme, the color film substrate is further provided with a second metal layer, the second metal layer covers the black matrix layer, and the second metal layer overlaps with the projection of the black matrix layer on the color film substrate.

As an alternative solution, the first metal layer includes a plurality of first metal strips extending along a first direction and a plurality of second metal strips extending along a second direction, where the first direction intersects the second direction, each first metal strip has a first width, each second metal strip has a second width, and the first width is smaller than the second width.

As an alternative technical scheme, the substrate of the array substrate is provided with a third surface, the third surface deviates from the color film substrate, the third surface is provided with a second polarizer, and the transmission axis of the second polarizer is perpendicular to the transmission axis of the first polarizing layer.

As an optional technical scheme, the projection device further includes a first fresnel lens and a second fresnel lens, where the first fresnel lens is located between the light source and the APCF layer, and the second fresnel lens is located between the array substrate and the lens.

As an alternative solution, the light source is a white LED or a combination of red, green and blue LEDs.

In addition, the utility model also provides another projection device which comprises a light source, a liquid crystal panel and a lens. The liquid crystal panel comprises an array substrate, a color film substrate and a liquid crystal molecular layer, wherein the array substrate and the color film substrate are oppositely arranged, the liquid crystal molecular layer is clamped between the color film substrate and the array substrate, the color film substrate is positioned between the array substrate and the light source, the substrate of the color film substrate is provided with a first surface and a second surface which are opposite, the first surface faces the light source, the second surface faces the array substrate, the first surface is provided with an APCF polarizing plate, the second surface is provided with a first metal layer and a color resistance layer, the color resistance layer comprises a plurality of color resistance blocks, the first metal layer is provided with a plurality of hollow areas which are arranged in an array, the color resistance blocks are correspondingly positioned in the hollow areas, and light emitted by the light source is transmitted to the lens after passing through the liquid crystal panel.

In the projection device, the APCF polarizing functional layer is arranged on the surface of the color film substrate facing the light source, meanwhile, the metal layer is arranged on the surface of the color film substrate facing the array substrate, the transmittance of light rays emitted by the light source reaching the base material of the color film substrate is improved by the APCF polarizing functional layer, and the transmittance of light rays entering the color resistance layer after reaching the base material of the color film substrate is improved by the metal layer, so that the transmittance of a liquid crystal panel in the projection device is improved, and user experience is improved.

The utility model will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the utility model thereto.

Drawings

FIG. 1 is a schematic view of a projection apparatus according to a first embodiment of the present utility model;

FIG. 2 is a schematic view of a portion of a first metal layer of a projection apparatus according to the present utility model;

FIG. 3 is a schematic partial cross-sectional view of an embodiment of a liquid crystal panel in a projection apparatus according to the present utility model;

FIG. 4 is a schematic partial cross-sectional view of another embodiment of a liquid crystal panel in a projection apparatus according to the present utility model;

fig. 5 is a schematic diagram of a projection apparatus according to a second embodiment of the present utility model.

Detailed Description

The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the utility model may be practiced. The terms of directions used in the present utility model, such as "up", "down", "front", "back", "left", "right", "side", etc., refer only to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the utility model and is not limiting of the utility model.

Referring to fig. 1 to 3, fig. 1 is a schematic diagram of a first embodiment of a projection apparatus 100 according to the present utility model, fig. 2 is a partial schematic diagram of a first metal layer in the projection apparatus 100 according to the present utility model, and fig. 3 is a partial cross-sectional schematic diagram of an embodiment of a liquid crystal panel in the projection apparatus according to the present utility model. In the present utility model, the projection device 100 includes a light source 10, a liquid crystal panel 20 and a lens 30, wherein light emitted from the light source 10 is transmitted to the lens 30 through the liquid crystal panel 20.

Referring to fig. 2 and 3, the liquid crystal panel 20 includes an array substrate 210, a color film substrate 220, and a liquid crystal molecular layer 230, where the array substrate 210 and the color film substrate 220 are disposed opposite to each other, the liquid crystal molecular layer 230 is sandwiched between the array substrate 210 and the color film substrate 220, and the color film substrate 220 is located between the array substrate 210 and the light source 10, so that light emitted from the light source 10 passes through the color film substrate 220 before being incident on the array substrate 210. The substrate 201 of the color film substrate 220 has a first surface s1 and a second surface s2 opposite to each other, the first surface s1 faces the light source 10 (i.e. faces away from the array substrate 210), the second surface s2 faces the array substrate 210, the first surface s1 is provided with an APCF (Advanced polarization conversion film, highly polarized light converting film) layer 221 and a first polarizing layer 222, the APCF layer 221 is located between the light source 10 and the first polarizing layer 222, and the transmission axis of the APCF layer 221 is consistent with that of the first polarizing layer 222. The second surface s2 is provided with a first metal layer M1 and a plurality of color blocks 223, the first metal layer M1 has a plurality of hollowed-out areas h arranged in an array, and the plurality of color blocks 223 are correspondingly located in the plurality of hollowed-out areas h.

In one embodiment, the first polarizing layer 222 is capable of passing P polarized light and not S polarized light. The light source 10 emits natural light containing P-polarized light and S-polarized light, and if the APCF layer 221 is not provided, only the P-polarized light therein can reach the substrate 201 of the color film substrate 200 after the light emitted from the light source 10 passes through the first polarizing layer 222. In the present utility model, when the APCF layer 221 and the first polarizing layer 222 are provided and the transmission axis of the APCF layer 221 is identical to the transmission axis of the first polarizing layer 222, only the P-polarized light can pass through the APCF layer 221 after the natural light reaches the APCF layer 221, and the P-polarized light passing through the APCF layer 221 continues to pass through the first polarizing layer 222 and reaches the substrate 201 of the color film substrate 220 because the transmission axis of the first polarizing layer 222 is identical to the transmission axis of the APCF layer 221. The S polarized light cannot pass through the APCF layer 221 and is reflected back, the reflected light returns to the area where the light source 10 is located, and is reemitted in a natural light form after being reflected by the light source 10, among reemitted natural light, the P polarized light can pass through the APCF layer 221 and the first polarizing layer 222 and reach the substrate 201 of the color film substrate 220, the S polarized light is still reflected back by the APCF layer 221 and reemitted in a natural light form after being reflected by the light source 10 again, and thus the S polarized light reflected by the APCF layer 221 is repeatedly circulated again and is changed into natural light and is reemitted to the APCF layer 221 again, so that part of the P polarized light is emitted, and the light reaching the substrate 201 of the color film substrate 220 can theoretically approach the light quantity emitted by the light source 10, thereby improving the transmittance of the light emitted by the light source 10 reaching the substrate 201 of the color film substrate 220 after passing through the first polarizing layer 222.

The substrate 201 of the color film substrate 220 is a light-transmitting substrate, the light reaching the substrate 201 of the color film substrate 220 can pass through the substrate 201 of the color film substrate 220, if the first metal layer M1 is not provided but a black matrix layer of the prior art is adopted, only part of the light reaching the substrate 201 of the color film substrate 220 can pass through the areas where the plurality of color resistance blocks 223 are located, and the light irradiated to the black matrix layer will be absorbed by the black matrix layer. In the case of the present utility model, the first metal layer M1 is disposed, wherein the light incident on the plurality of hollow areas h of the first metal layer M1 can directly pass through the plurality of hollow areas h to be incident on the plurality of color blocks 223, and pass through the plurality of color blocks 223 to be continuously transmitted toward the array substrate 210. The light incident to the first metal layer M1 is blocked by the first metal layer M1 and reflected back, the reflected light sequentially passes through the first polarizing layer 222 and the APCF layer 221 and returns to the area where the light source 10 is located, the light is reflected by the light source 10 and then exits again in a natural light form, among the natural light which exits again, the P polarized light can pass through the APCF layer 221 and the first polarizing layer 222 and reach the substrate 201 of the color film substrate 220, the light incident to the plurality of hollow areas h can directly pass through the plurality of hollow areas h and enter the plurality of color resistance blocks 223, the light incident to the first metal layer M1 is blocked by the first metal layer M1 and reflected back, and thus the light reflected by the first metal layer M1 can be changed into natural light each time and then re-emitted to the APCF layer 221, the first polarizing layer 222, the substrate 201 of the color film substrate 220 and the first metal M1 again, and part of the light can be emitted from the plurality of hollow areas h of the first metal layer M1, so that the light which reaches the color film substrate 201 of the color film substrate 220 and the light emitted by the light source 10 can be increased in the light transmittance to the incident layer CF.

In this embodiment, an APCF polarizing functional layer (i.e. a combination of the APCF layer 221 and the first polarizing layer 222) is disposed on the surface of the color film substrate 220 facing the light source 10, and a first metal layer M1 is disposed on the surface of the color film substrate 220 facing the array substrate 210, so that the transmittance of the light emitted from the light source 10 reaching the substrate 201 of the color film substrate 220 is improved by the APCF polarizing functional layer, and the transmittance of the light incident on the color resist layer CF after reaching the substrate 201 of the color film substrate 220 is improved by the first metal layer M1, thereby improving the overall transmittance of the liquid crystal panel 10 in the projection device 100 and improving the user experience.

In the foregoing embodiment, the APCF layer 221 and the first polarizing layer 222 are capable of passing P polarized light, and the S polarized light is not capable of passing S polarized light, but is not limited thereto. In another embodiment, the first polarizing layer 222 is capable of passing S polarized light and P polarized light.

As shown in fig. 2, the first metal layer M1 includes a plurality of first metal strips l1 extending along a first direction F1 and a plurality of second metal strips l2 extending along a second direction F2, the first direction F1 intersects the second direction F2, each first metal strip l1 has a first width w1, each second metal strip l2 has a second width w2, and the first width w1 is smaller than the second width w2. In the present embodiment, the first direction F2 is perpendicular to the second direction F2, but not limited thereto. In an embodiment, a plurality of data lines may be disposed on the array substrate 210 corresponding to the plurality of first metal strips l1, and a plurality of gate lines may be disposed corresponding to the plurality of second metal strips l2, but not limited thereto.

As shown in fig. 1 and fig. 3, the substrate of the array substrate 210 has a third surface s3, the third surface s3 faces away from the color film substrate 220, the third surface s3 is provided with a second polarizer 211, and a transmission axis of the second polarizer 211 is perpendicular to a transmission axis of the first polarizing layer 222.

In one embodiment, the light source 10 is a white light LED or a combination of red, green and blue light LEDs to provide the natural light. As shown in fig. 1, the projection device 100 further includes a first fresnel lens 40 and a second fresnel lens 50, wherein the first fresnel lens 40 is located between the light source 10 and the APCF layer 221, and the second fresnel lens 50 is located between the array substrate 210 and the lens 30. The light source 10 may be disposed at the focal point of the first fresnel lens 40, and the lens 30 may be disposed at the focal point of the second fresnel lens 50. The light emitted from the light source 10 is collimated by the first fresnel lens 40, then enters the APCF layer 221, the first polarizing layer 222, the substrate of the color film substrate 220, the color blocking layer CF, the liquid crystal molecular layer 230, the substrate of the array substrate 210, and the second polarizing layer 211, and the light emitted from the liquid crystal panel 20 can be a light beam carrying image information, and is focused on the lens 30 by the second fresnel lens 40, amplified, and projected onto the target projection surface for imaging.

As shown in fig. 1, the projection apparatus 100 may further include a through-hole reflector 60 to further improve the light utilization. The reflector cup 60 has a truncated cone shape, and the inner surface of the reflector cup 60 may have a high reflectivity, for example, coated with an aluminum film. The reflective cup 60 has a first bottom 61 and a second bottom 62 opposite to each other, the cross-sectional area of the first bottom 61 is smaller than that of the second bottom 62, the first bottom 61 is sleeved on the light source 10, and the second bottom 62 is sleeved on the first fresnel lens 40.

In an embodiment, the first metal layer M1 is a molybdenum layer, but not limited thereto. As shown in fig. 3, the first metal layer M1 has a first thickness, and the plurality of color blocks 223 has a second thickness, wherein the first thickness is not greater than the second thickness, for example, the first thickness is less than one-half, one-third, or even one-fifth of the second thickness. The first metal layer M1 is mainly used for reflecting light emitted to the first metal layer M1 back to the light source 10, and the thickness of the first metal layer M1 is set to be smaller (even far smaller) than the thickness of the plurality of color blocks 223, so that the manufacturing cost of the liquid crystal panel 20 can be effectively controlled. Referring to fig. 4, fig. 4 is a schematic partial view of another embodiment of a liquid crystal panel in the projection apparatus of the present utility model. As shown in fig. 4, in the present embodiment, a black matrix layer BM is further disposed on the color film substrate 220, and the black matrix layer BM covers the first metal layer M1, and the projections of the black matrix layer BM and the first metal layer M1 on the color film substrate 220 overlap, so that the black matrix layer BM and the first metal layer M1 may have the same hollowed-out area h. By means of the arrangement of the black matrix layer BM, the overall thickness of the composite structure formed by the first metal layer M1 and the black matrix layer BM can be ensured under the condition that the first metal layer M1 is thinner, so that the hollow-out area h can be ensured to play an effective guiding/blocking function in the process of forming the color resistance layer CF.

Further, as shown in fig. 4, in this embodiment, besides the first metal layer M1 and the black matrix layer BM, a second metal layer M2 may be further disposed on the color film substrate 220, where the second metal layer M2 covers the black matrix layer BM, and the projections of the second metal layer M2 and the black matrix layer BM on the color film substrate 220 overlap, so that the first metal layer M1, the black matrix layer BM and the second metal layer M2 may have the same hollowed-out area h.

The surface of the array substrate 210 facing the color film substrate 220 is generally provided with a driving circuit, and the driving circuit includes an opaque metal layer. The light beam passes through the color resist layer CF and then enters the array substrate 210, a part of the light beam passes through the area where the opaque metal layer is not arranged and then enters the lens 30, and another part of the light beam enters the area where the opaque metal layer is arranged and then is blocked by the opaque metal layer and then is reflected back. In the prior art, only the black matrix layer is disposed on the color film substrate 220, and the light reflected by the opaque metal layer is absorbed by the black matrix layer if reaching the black matrix layer. In this embodiment, by the arrangement of the second metal layer M2, the light reflected by the opaque metal layer can be redirected to the array substrate 220 after reaching the second metal layer M2 by the reflection and redirection of the second metal layer M2. Thus, the amount of light passing through the array substrate 210 can be increased, and the transmittance of light can be increased. In addition, by means of the sandwich stacking structure of the first metal layer M1, the black matrix layer BM and the second metal layer M3, the first metal layer M1 and the second metal layer M2 are controlled to have a thinner thickness, and the production cost is controlled under the condition of improving the light transmittance.

In the projection apparatus 100 shown in fig. 1, the surface of the color film substrate 220 facing the light source 10 is provided with an APCF layer 221 and a first polarizing layer 222 as APCF polarizing functional layers, and in practical operation, the APCF polarizing functional layers may be single elements, i.e. the APCF layer and the polarizing layer may be integrated into an APCF polarizing plate. Referring to fig. 5, fig. 5 is a schematic diagram of a projection apparatus according to a second embodiment of the utility model. As shown in fig. 5, the projection device 100 'includes a light source 10, a liquid crystal panel 20', and a lens 30, wherein the lens 30 transmits light emitted by the light source 10 to the lens 30 after passing through the liquid crystal panel 20. The liquid crystal panel 20' includes an array substrate 210, a color film substrate 220', and a liquid crystal molecule layer 230, wherein the array substrate 210 and the color film substrate 220' are disposed opposite to each other, the liquid crystal molecule layer 230 is sandwiched between the color film substrate 220' and the array substrate 210, and the color film substrate 220' is disposed between the array substrate 210 and the light source 10. The substrate 201 of the color film substrate 220 'has a first surface and a second surface opposite to each other, the first surface faces the light source 10, the second surface faces the array substrate 210, the first surface is provided with an APCF polarizing plate 221', the second surface s2 is provided with a first metal layer M1 and a color blocking layer (not shown), the color blocking layer includes a plurality of color blocking blocks, the first metal layer M1 has a plurality of hollow areas (not shown) arranged in an array, and the plurality of color blocking blocks are correspondingly located in the plurality of hollow areas.

The APCF polarizing plate 221' allows P polarized light to pass therethrough, and prevents S polarized light from passing therethrough. Similar to the principle of the first embodiment, the light source 10 emits natural light, and after the natural light reaches the APCF polarizing plate 221', only the P polarized light can pass through the APCF polarizing plate 221' and reach the substrate 201 of the color film substrate 220. The S polarized light cannot pass through the APCF polarizing plate 221' and is reflected back, the reflected light returns to the area where the light source 10 is located, and is emitted again in a natural light form after being reflected by the light source 10, among the reemitted natural light, the P polarized light passes through the APCF polarizing plate 221' and reaches the base 201 of the color film substrate 220, the S polarized light is still reflected back by the APCF polarizing plate 221', and is emitted again in a natural light form after being reflected by the light source 10, so that the S polarized light reflected by the APCF polarizing plate 221' is changed into the natural light again and then is emitted to the APCF polarizing plate 221' again, so that the transmittance of the light emitted by the light source 10 reaching the base 201 of the color film substrate 220 is improved. It should be noted that other elements of the projection apparatus 100' are similar to those of the projection apparatus 100 in the first embodiment, and are not described again.

According to the utility model, the APCF polarizing functional layer is arranged on the surface of the color film substrate facing the light source, meanwhile, the metal layer is arranged on the surface of the color film substrate facing the array substrate, the transmittance of light rays emitted by the light source reaching the base material of the color film substrate is improved by the APCF polarizing functional layer, and the transmittance of light rays entering the color resistance layer after reaching the base material of the color film substrate is improved by the metal layer, so that the transmittance of a liquid crystal panel in the projection device is improved, and the user experience is improved.

The above detailed description of the preferred embodiments is intended to more clearly describe the features and spirit of the present utility model, but is not intended to limit the scope of the present utility model by the above disclosed preferred embodiments. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the utility model as defined by the appended claims. The scope of the utility model is therefore to be construed in its broadest sense in view of the foregoing description and is instead intended to cover all possible modifications and equivalent arrangements.

Claims (10)

1. A projection apparatus, comprising:

A light source;

The liquid crystal panel comprises an array substrate, a color film substrate and a liquid crystal molecular layer, wherein the array substrate and the color film substrate are oppositely arranged, the liquid crystal molecular layer is clamped between the color film substrate and the array substrate, the color film substrate is positioned between the array substrate and the light source, the substrate of the color film substrate is provided with a first surface and a second surface which are opposite, the first surface faces the light source, the second surface faces the array substrate, the first surface is provided with an APCF layer and a first polarizing layer, the APCF layer is positioned between the light source and the first polarizing layer, the transmission axis of the APCF layer is consistent with that of the first polarizing layer, the second surface is provided with a first metal layer and a color resistance layer, the color resistance layer comprises a plurality of color resistance blocks, the first metal layer is provided with a plurality of hollow areas which are arrayed, the color resistance blocks are correspondingly positioned in the plurality of hollow areas, and

And the light emitted by the light source passes through the liquid crystal panel and then is transmitted to the lens.

2. The projection device of claim 1, wherein the first metal layer is a molybdenum layer.

3. The projection device of claim 1, wherein the first metal layer has a first thickness and the plurality of color blocks has a second thickness, the first thickness being no greater than the second thickness.

4. A projection device as claimed in claim 1 or 3, wherein a black matrix layer is further disposed on the color film substrate, and the black matrix layer covers the first metal layer, and the black matrix layer overlaps with the projection of the first metal layer on the color film substrate.

5. The projection device of claim 4, wherein a second metal layer is further disposed on the color film substrate, and the second metal layer covers the black matrix layer, and the second metal layer overlaps the projection of the black matrix layer on the color film substrate.

6. The projection device of claim 1, wherein the first metal layer comprises a plurality of first metal strips extending in a first direction and a plurality of second metal strips extending in a second direction, the first direction intersecting the second direction, each first metal strip having a first width, each second metal strip having a second width, the first width being less than the second width.

7. The projection device of claim 1, wherein the substrate of the array substrate has a third surface, the third surface faces away from the color film substrate, the third surface is provided with a second polarizer, and a transmission axis of the second polarizer is perpendicular to a transmission axis of the first polarizing layer.

8. The projection device of claim 1, further comprising a first fresnel lens and a second fresnel lens, the first fresnel lens being located between the light source and the APCF layer, the second fresnel lens being located between the array substrate and the lens.

9. The projection device of claim 1, wherein the light source is a white LED or a combination of red, green and blue LEDs.

10. A projection apparatus, comprising:

A light source;

The liquid crystal panel comprises an array substrate, a color film substrate and a liquid crystal molecule layer, wherein the array substrate and the color film substrate are oppositely arranged, the liquid crystal molecule layer is clamped between the color film substrate and the array substrate, the color film substrate is positioned between the array substrate and the light source, the substrate of the color film substrate is provided with a first surface and a second surface which are opposite, the first surface faces the light source, the second surface faces the array substrate, the first surface is provided with an APCF polarizing plate, the second surface is provided with a first metal layer and a color resistance layer, the color resistance layer comprises a plurality of color resistance blocks, the first metal layer is provided with a plurality of hollow areas which are arrayed, the color resistance blocks are correspondingly positioned in the hollow areas, and

And the light emitted by the light source passes through the liquid crystal panel and then is transmitted to the lens.