CN218383620U - Projection device and electrical equipment - Google Patents

Abstract

The embodiment of the utility model discloses a projection arrangement and electrical equipment, this projection arrangement includes the installation body, light source board, display panel and imaging lens, is equipped with the light path passageway in the installation body, and the light source board is located the entry end of light path passageway, and is used for sending the light beam to the light path passageway, and display panel and imaging lens all locate in the light path passageway, and along the transmission direction interval distribution of light beam, so that the light beam that the light source board sent can pass through display panel and imaging lens outgoing in proper order, shine and generate the image on the projection surface; wherein, the light path passageway between display panel and the imaging lens has optics inner wall, and at least some optics inner walls are equipped with the micro-structure that is used for eliminating stray light, can improve the stray light of light path through the micro-structure to eliminate "ghost image" to a certain extent, in order to promote projection arrangement's imaging quality, thereby can improve the display effect of instructing the illumination, user experience is better.

Description

Projection device and electrical equipment

Technical Field

The utility model relates to a projection display technology field especially relates to a projection arrangement and electrical equipment.

Background

Indication type lighting is one of important components of household appliance lighting, and can display the working state of the household appliance to indicate the state to a user. The existing indication type lighting generally adopts a projection device, the projection device can project the working state of a household appliance on the ground for a user to check, generally speaking, the projection of the projection device generates an image, and due to the defect of light path design, a ghost image is formed at the edge of the image due to stray light, so that the imaging effect of the projection device is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a projection arrangement and electrical equipment aims at solving current projection arrangement projection and produces the image, because the defect of light path design can form "ghost" because of stray light at the edge of image to lead to the relatively poor problem of projection arrangement's formation of image effect.

In a first aspect, the present invention provides a projection apparatus, including: the light source plate is arranged at the inlet end of the light path channel and used for emitting light beams into the light path channel, and the display panel and the imaging lens are arranged in the light path channel and distributed at intervals along the transmission direction of the light beams so that the light beams emitted by the light source plate can sequentially pass through the display panel and the imaging lens to be emitted out and irradiate on a projection surface to generate images;

the light path channel between the display panel and the imaging lens is provided with an optical inner wall, and at least part of the optical inner wall is provided with a microstructure for eliminating stray light.

In one embodiment, the microstructures are prismatic protruding structures or bascule structures formed on the optical inner wall.

In one embodiment, the prismatic projection structure comprises a first inclined surface and a second inclined surface which are adjacent, and the included angle between the first inclined surface and the second inclined surface is 80-150 degrees.

In one embodiment, the optical inner wall is formed with a frosted surface.

In one embodiment, the light path channel includes a first channel and a second channel, the display panel is disposed in the first channel, the imaging lens is disposed in the second channel, and the first channel is communicated with the second channel and forms an included angle;

the projection device further comprises a reflecting mirror, the reflecting mirror is arranged at the communication part of the first channel and the second channel and used for deflecting the light beam, and the microstructure is formed on the optical inner wall between the reflecting mirror and the imaging lens.

In one embodiment, the first channel extends along a first direction, the second channel extends along a second direction, and the first direction and the second direction form an included angle of 85-95 degrees.

In one embodiment, the radial cross section of the light path channel at the microstructure is square, the optical inner wall includes a first face and a second face which are oppositely arranged, and a third face and a fourth face which are oppositely arranged, the first face and the second face are arranged at an included angle with the first direction, and the third face and the fourth face are parallel to the first direction;

wherein the microstructure is formed on at least one of the first face and the second face.

In one embodiment, the projection device further includes an illumination lens disposed in the first channel and between the light source board and the display panel; and/or

The installation body includes first side support and second side support, first side support with second side support relatively fixed is in order to form a plurality of installation positions, the light source board display panel with imaging lens is the preface in proper order located the correspondence in the installation position.

In a second aspect, the present invention further provides an electrical apparatus, which includes an apparatus body, a door panel and a display component disposed inside the door panel, wherein the display component is the projection apparatus of any of the above embodiments.

In one embodiment, a first buckling position is arranged on the projection device, a second buckling position is arranged on the door panel, the first buckling position is an installation protrusion or an installation groove, and the second buckling position is an installation groove or an installation protrusion corresponding to the first buckling position, so that the first buckling position and the second buckling position can be detachably connected.

Adopt the embodiment of the utility model provides a, following beneficial effect has:

adopt the utility model discloses a projection arrangement, the light beam that the light source board sent can pass through display panel and imaging lens outgoing in proper order, shine and generate the image on the projection surface, thereby realize instructing the illumination, because light path passageway between display panel and the imaging lens has the optics inner wall, at least some optics inner wall is equipped with and is used for eliminating stray light micro-structure, can improve the stray light of light path through the micro-structure, thereby eliminate "ghost" to a certain extent, in order to promote projection arrangement's image quality. The projection device is applied to the electrical equipment, and the imaging quality of the projection device is good, so that the display effect of the indication illumination can be improved, and the user experience is good.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

fig. 1 is a schematic projection diagram of a projection apparatus in an electrical appliance according to an embodiment.

Fig. 2 is a schematic diagram of a projection device in the electrical apparatus shown in fig. 1.

Fig. 3 is another schematic view of the projection apparatus shown in fig. 2.

Fig. 4 is a top view of the projection apparatus shown in fig. 2.

Fig. 5 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A in fig. 4.

FIG. 6 is a schematic diagram of the projection apparatus shown in FIG. 2 with the optical module removed.

Fig. 7 is a schematic diagram of an optical module in the projection apparatus shown in fig. 2.

Fig. 8 is an exploded view of the optical module of fig. 7.

Fig. 9 is a top view of the optical module of fig. 7.

Fig. 10 is a sectional view taken along line B-B of fig. 9.

FIG. 11 is a schematic light guide diagram of a microstructure in one embodiment.

Reference numerals: 10. a door panel; 20. a projection device; 30. projecting the identifier; 100. a housing; 110. a first shell; 120. a second shell; 121. a first buckling position; 130. a notch; 200. a circuit board; 310. an installation body; 311. a first side support; 312. a second side bracket; 313. assembling the groove; 314. a first side mounting groove; 315. a second side mounting groove; 316. a mounting cavity; 317. a limiting structure; 320. a light source plate; 330. an illumination lens; 340. a display panel; 350. an imaging lens; 360. a fixed mount; 370. a mirror; 400. an optical path channel; 410. a first channel; 420. a second channel; 401. a microstructure; 421. a first side; 422. a second face.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back, 8230; \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, the descriptions in the present application related to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of technical features indicated are implicitly being indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The embodiment of the utility model provides an electrical equipment, this electrical equipment can be domestic appliance such as refrigerator, dish washer, is equipped with the projection arrangement who is used for showing operating condition on this domestic appliance, and this projection arrangement can show the state sign on display table surface such as ground, display panel to for the state of user indication electrical equipment, satisfy the interactive application environment between electrical equipment and the user, promoted user experience.

Referring to fig. 1, an electrical apparatus of an embodiment includes an apparatus body, a door panel 10, and a display component disposed on an inner side of the door panel 10, where the display component is a projection device 20, and the projection device 20 is disposed on the inner side of the door panel 10, so that the projection device 20 can be hidden, and the projection device 20 can project an actual working state of the electrical apparatus onto the ground to form a projection mark 30, so that a user on an outer side of the door panel 10 can know the working state.

In this embodiment, please refer to fig. 3 and fig. 6 together, a first fastening position 121 is disposed on the projection apparatus 20, a second fastening position is disposed on the door panel 10, the first fastening position 121 is a mounting protrusion or a mounting groove, and the second fastening position is a mounting groove or a mounting protrusion corresponding to the first fastening position 121, so that the first fastening position 121 and the second fastening position can be detachably connected to achieve the mounting of the display component on the door panel 10, the assembly is simple and accurate, the replacement is easy, and the cost is reduced. Of course, in other embodiments, the display component may be fixed on the door panel 10 by screws, glue, or other methods.

In an embodiment, referring to fig. 2, fig. 4 and fig. 5, the projection apparatus 20 further includes a housing 100, a circuit board 200 and a mounting body 310, wherein the circuit board 200 and the mounting body 310 are disposed in the housing 100 to implement the mounting of the circuit board 200 and the mounting body 310. Further, the housing 100 includes a first shell 110 and a second shell 120, and the first shell 110 and the second shell 120 enclose to form an accommodating cavity for accommodating the circuit board 200 and the mounting body 310.

The projection apparatus 20 further includes a light source board 320, a display panel 340 and an imaging lens 350, the light source board 320, the display panel 340 and the imaging lens 350 are all disposed on the mounting body 310, so as to integrate the related optical components on the mounting body 310 to form an optical module, the optical module can be directly assembled in the accommodating cavity integrally, and is convenient to mount, the housing 100 has a notch 130, and the notch 130 is used for exposing the projection outlet of the optical module.

Further, referring to fig. 1 and fig. 3, the first fastening locations 121 are disposed on the second shell 120, a plurality of first fastening locations 121 are disposed, and the second fastening locations and the first fastening locations 121 are disposed in a one-to-one correspondence manner, so as to achieve stable installation of the projection apparatus 20.

Specifically, the first shell 110 and the second shell 120 are vertically disposed, and the first shell 110 and the second shell 120 may be detachably connected through a snap structure, and may also be fixed through hot melting or ultrasonic fixing.

Of course, in other embodiments, the number of the second fastening locations may be greater than the number of the first fastening locations 121, so that the first fastening locations 121 may be selectively matched with one or more of the second fastening locations to change the installation position of the display component, so as to adjust the distance and the position of the display component relative to the ground.

In an embodiment, referring to fig. 5 and fig. 10, an optical path channel 400 is disposed in the mounting body 310, the light source board 320 is disposed at an inlet end of the optical path channel 400 and is used for emitting light beams into the optical path channel 400, and the display panel 340 and the imaging lens 350 are disposed in the optical path channel 400 and are distributed at intervals along a transmission direction of the light beams, so that the light beams emitted by the light source board 320 can sequentially pass through the display panel 340 and the imaging lens 350 to be emitted out, and irradiate on a projection surface to generate an image, thereby implementing indication illumination.

In this embodiment, the light path channel 400 between the display panel 340 and the imaging lens 350 has an optical inner wall, at least a portion of the optical inner wall is provided with a microstructure 401 for eliminating stray light, the stray light of the light path can be improved through the microstructure 401, so that "ghost" is eliminated to a certain extent, the imaging quality of the projection apparatus 20 is improved, the display effect of the indication illumination can be improved, and the user experience is better.

It can be understood that, the transmission direction of a part of light beams forms an included angle with the axial direction of the optical channel, and because the inner wall of the optical channel is a smooth surface, the optical channel can generate mirror reflection, so that stray light is caused, and the problem of ghost image generated by projection can be caused in the transmission process of the stray light. Because the micro-structure 401 is formed in the optical channel in the embodiment, the smooth surface of the inner wall of the optical channel can be damaged, thereby avoiding specular reflection and eliminating ghost, so as to improve the imaging quality of the projection device 20.

Further, in the embodiment, the microstructure 401 is a prismatic convex structure or a shading structure formed on the inner wall of the optical channel, so that the smooth inner wall of the optical channel is damaged by the prismatic convex structure or the shading structure, and the generation of specular reflection is avoided.

Specifically, the prismatic convex structures can be triangular prismatic structures with equal angles or unequal angles. The prismatic convex structure can be a zigzag array structure; further, the prismatic convex structure comprises a first inclined surface and a second inclined surface which are adjacent, the included angle between the first inclined surface and the second inclined surface is 80-150 degrees, specifically, the included angle between the first inclined surface and the second inclined surface can be selected to be 80 degrees, 120 degrees or 150 degrees, and the first inclined surface is obliquely arranged relative to the second inclined surface.

Further, in this embodiment, the optical inner wall is formed with a frosted surface, so that the smooth surface of the optical channel inner wall is further damaged by the frosted surface, thereby avoiding specular reflection, and further eliminating "ghost image" to improve the imaging quality of the projection apparatus 20.

Of course, in other embodiments, the microstructure 401 may also be selected as a stripe structure or other bump structure, or the included angle between the first side 421 and the second side 422 may also be selected as other angles such as 60 degrees to 80 degrees, 150 degrees to 160 degrees, and the like.

In an embodiment, referring to fig. 5, 7 to 10, the light path channel 400 includes a first channel 410 and a second channel 420, the display panel 340 is disposed in the first channel 410, the imaging lens 350 is disposed in the second channel 420, and the first channel 410 is communicated with the second channel 420 and forms an included angle; the projection apparatus 20 further includes a mirror 370, and the mirror 370 is disposed at a communication position of the first passage 410 and the second passage 420, and deflects the light beam to change a direction of the light path and change an arrangement track of the light path. Specifically, the microstructures 401 are formed on the optical inner wall between the reflector 370 and the imaging lens 350, and the projection apparatus 20 further includes an illumination lens 330, wherein the illumination lens 330 is disposed in the first channel 410 and located between the light source board 320 and the display panel 340.

In an embodiment, referring to fig. 10, a direction indicated by an arrow X in fig. 10 is a first direction, a direction indicated by an arrow Y in fig. 10 is a second direction, the first channel 410 extends along the first direction, the second channel 420 extends along the second direction, and the first direction and the second direction form an included angle of 85 degrees to 95 degrees, so that the light path has a simple and compact structure and a small overall size, and is advantageously applied in a narrow space. Meanwhile, the light beam in the first channel 410 is deflected by 85 degrees to 95 degrees by the reflecting mirror 370, specifically, the first direction and the second direction form an included angle of 85 degrees, 90 degrees or 95 degrees, and the light beam in the first channel 410 is deflected by 85 degrees, 90 degrees or 95 degrees by the reflecting mirror 370.

Preferably, the first direction is perpendicular to the second direction, so that the optical path channel 400 is disposed in an L-shape. On one hand, the total length of the optical path can be effectively reduced, and on the other hand, the optical paths of the first channel 410 and the second channel 420 are vertically arranged in parallel, and the problem that the height of the imaging lens 350 part (light emitting part) in the projection device 20 is too large due to the influence of the size of the display panel 340 can be avoided, so that the height of the imaging lens 350 part can be controlled, and the space structure of the electrical equipment can be matched.

In the present embodiment, referring to fig. 5, light beams emitted from the light source board 320 are focused by the illumination lens 330, so that the display panel 340 emits light uniformly, the transmission direction of the light beams is changed by the reflector 370, and then clear patterns are transmitted to the ground by the imaging lens 350 for display.

Specifically, the number of the imaging lenses 350 is plural, and preferably, the number of the imaging lenses 350 is 2. Of course, in other embodiments, there may be more than one illuminating lens 330, and there may be 3, 4 or more than one imaging lens 350, and the number is adjusted according to the actual application scene, the appearance size and the imaging effect requirement.

In an embodiment, referring to fig. 10, a radial cross section of the optical path channel 400 at the microstructure 401 is square, the optical inner wall includes a first surface 421 and a second surface 422 disposed opposite to each other, and a third surface and a fourth surface disposed opposite to each other, the first surface 421 and the second surface 422 both form an included angle with the first direction, and the third surface and the fourth surface are both parallel to the first direction; wherein microstructures 401 are formed on at least one of first side 421 and second side 422.

In this embodiment, the specific location and size of the microstructures 401 in the optical channel can be adjusted according to the specific design requirement of the projection apparatus 20.

For example, referring to fig. 11, the microstructure 401 is formed on the first surface 421, a part of the light beam deflected by the mirror 370 is directed to the first surface 421, the microstructure 401 can reflect the light beam to the second surface 422, and the second surface 422 reflects the light beam to the first surface 421, so that the part of the light beam is reflected for multiple times, and after multiple reflections, the brightness of the part of the light beam as stray light is reduced, thereby eliminating the "ghost" problem of the image to a certain extent. It will be appreciated that, in multiple reflections of the partial beam, the partial beam also enables a reverse transmission in the direction of the mirror 370.

Of course, in this embodiment, the microstructure 401 may also be formed on the second side 422, or the microstructure 401 may be formed on both the first side 421 and the second side 422.

Of course, in other embodiments, the microstructure 401 may be disposed on the third surface or the fourth surface according to the design requirement of the projection apparatus 20, and the radial cross section of the optical path channel 400 may also be disposed in a circular shape or other shapes.

In an embodiment, referring to fig. 5, 7 and 8, the mounting body 310 includes a first side bracket 311 and a second side bracket 312, the first side bracket 311 and the second side bracket 312 are fixed relatively to form a plurality of mounting positions, and the light source board 320, the display panel 340 and the imaging lens 350 are sequentially disposed in the corresponding mounting positions. Because a plurality of installation positions for installing the optical component are formed only by matching the two brackets, the installation structure is simple, the assembly is convenient, and the production cost is reduced.

In this embodiment, the light source board 320 is provided with an LED lamp bead, which is a white light bead with a 380nm-780nm continuous spectrum, and the color temperature range is 2200K-7000K. Preferably, the color temperature range of the LED lamp beads is 6000K-7000K. Of course, in other embodiments, the LED lamp bead may also be an RGB LED lamp bead, and the color temperature range of the LED lamp bead may also be above 7000K.

In an embodiment, referring to fig. 5, the mounting body 310 is provided with a mounting groove 313, the mounting groove 313 is one of a plurality of mounting positions, the display panel 340 is mounted in the mounting groove 313 through a mounting opening of the mounting groove 313, and the display panel 340 can be simply mounted on the mounting body 310 through the mounting opening, thereby facilitating replacement and maintenance of the display panel 340. The display panel 340 may be an LCD screen.

Further, the projection apparatus 20 further includes a fixing frame 360, and the fixing frame 360 can be detachably connected to the mounting body 310 to limit the display panel 340 in the mounting groove 313.

The fixing frame 360 is separated from the installation body 310, the display panel 340 can be installed in the assembling groove 313 or taken out of the assembling groove 313, the fixing frame 360 is fixed on the installation body 310, and the fixing frame 360 can shield at least part of the assembling opening to limit the display panel 340 in the assembling groove 313. Specifically, the fixing frame 360 can elastically abut against the display panel 340 to stably mount the display panel 340 in the mounting groove 313.

In an embodiment, referring to fig. 8, the first side bracket 311 is provided with a first side mounting groove 314, the second side bracket 312 is provided with a second side mounting groove 315, the first side mounting groove 314 and the second side mounting groove 315 are surrounded to form a mounting cavity 316, at least a portion of the mounting cavity forms the light path channel 400, the mounting cavity 316 is provided with a plurality of limiting structures 317, and the light source plate 320, the illuminating lens 330, the display panel 340 and the imaging lens 350 are mounted in the mounting cavity 316 through the plurality of limiting structures 317; when the first side bracket 311 is separated from the second side bracket 312, the light source plate 320, the illumination lens 330, the display panel 340 and the imaging lens 350 can be correspondingly mounted in the first side mounting groove 314 or the second side mounting groove 315, so that the related optical components can be precisely positioned and fixed on the mounting body 310. Specifically, the first side bracket 311 and the second side bracket 312 are disposed opposite to each other in the left-right direction.

Due to the arrangement of the plurality of limiting structures 317, a plurality of mounting positions for limiting the positions of the light source board 320, the illumination lens 330, the display panel 340 and the imaging lens 350 may be formed in the mounting cavity 316 to limit the relevant optical components in the mounting positions.

Since the mounting cavity 316 is defined by the first side mounting groove 314 and the second side mounting groove 315, after the first side bracket 311 is separated from the second side bracket 312, the light source board 320, the illumination lens 330, the display panel 340 and the imaging lens 350 can be simply mounted in the first side mounting groove 314 or the second side mounting groove 315 correspondingly, and the first side bracket 311 and the second side bracket 312 are assembled close to each other, so as to complete the integrated assembly of the related optical components.

Of course, in other embodiment examples, the first side bracket 311 may be provided with a first side mounting groove 314, the second side bracket 312 closes a notch of the first side mounting groove 314 to form a mounting cavity 316, a plurality of limiting structures 317 are provided in the mounting cavity 316, and the light source board 320, the illumination lens 330, the display panel 340 and the imaging lens 350 are mounted in the mounting cavity 316 through the plurality of limiting structures 317; when the first side bracket 311 is separated from the second side bracket 312, the light source plate 320, the illumination lens 330, the display panel 340 and the imaging lens 350 can be correspondingly mounted in the first side mounting groove 314, and a simple assembly of the related optical components can also be achieved.

Meanwhile, the limiting structure 317 can be omitted, and the light source board 320, the illuminating lens 330, the display panel 340 and the imaging lens 350 are fixed in the mounting cavity 316 in a buckling, screwing, hot melting or gluing manner.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims (10)

1. A projection device, comprising: the light source plate is arranged at the inlet end of the light path channel and used for emitting light beams into the light path channel, and the display panel and the imaging lens are arranged in the light path channel and distributed at intervals along the transmission direction of the light beams so that the light beams emitted by the light source plate can sequentially pass through the display panel and the imaging lens to be emitted out and irradiate on the projection surface to generate images;

the optical path channel between the display panel and the imaging lens is provided with an optical inner wall, and at least part of the optical inner wall is provided with a microstructure for eliminating stray light.

2. The projection device of claim 1, wherein the microstructures are prismatic protruding structures or bascule structures formed on the inner optical wall.

3. A projection device as recited in claim 2, wherein the prismatic relief structure includes adjacent first and second angled surfaces, the first angled surface being angled between 80 degrees and 150 degrees from the second angled surface.

4. The projection device of claim 2, wherein the optical inner wall is formed with a frosted surface.

5. The projection apparatus according to any of claims 1 to 4, wherein the optical path channel includes a first channel and a second channel, the display panel is disposed in the first channel, the imaging lens is disposed in the second channel, and the first channel is communicated with the second channel and forms an included angle;

the projection device further comprises a reflecting mirror, the reflecting mirror is arranged at the communication part of the first channel and the second channel and is used for deflecting the light beam, and the microstructure is formed on the optical inner wall between the reflecting mirror and the imaging lens.

6. The projection device of claim 5, wherein the first channel extends in a first direction and the second channel extends in a second direction, the first direction being disposed at an angle of 85 degrees to 95 degrees from the second direction.

7. The projection apparatus of claim 6, wherein a radial cross-section of the light path channel at the microstructure is square, the optical inner wall includes first and second oppositely disposed faces, and third and fourth oppositely disposed faces, the first and second faces each being disposed at an angle to the first direction, the third and fourth faces each being parallel to the first direction;

wherein the microstructure is formed on at least one of the first face and the second face.

8. The projection device of claim 5, further comprising an illumination lens disposed within the first channel and between the light source board and the display panel; and/or

The installation body includes first side support and second side support, first side support with second side support relatively fixed is in order to form a plurality of installation positions, the light source board display panel with imaging lens is corresponding in proper order in the installation position.

9. An electric appliance, characterized by comprising an appliance body, a door panel and a display component arranged on the inner side of the door panel, wherein the display component is the projection device as claimed in any one of claims 1 to 8.

10. The electrical equipment of claim 9, wherein the projection device is provided with a first fastening position, the door panel is provided with a second fastening position, the first fastening position is a mounting protrusion or a mounting groove, and the second fastening position is a mounting groove or a mounting protrusion corresponding to the first fastening position, so that the first fastening position can be detachably connected with the second fastening position.

Images