78 results about "LCD projector" patented technology

The utility model relates to an LCD (Liquid Crystal Display) direct projection light path structure which comprises a light emitting unit, a rear Fresnel lens, an LCD screen, a front Fresnel lens and a projection lens which are sequentially arranged along the light propagation direction, the focal length of the rear Fresnel lens ranges from 40 mm to 80 mm, the size of the LCD screen ranges from 2.2 inches to 3.2 inches, and the focal length of the front Fresnel lens ranges from 50 mm to 90 mm. The distance between the light emitting surface of the LCD screen and the light incident surface of the projection lens is 40-70mm, and the focal length of the projection lens is less than 80mm. According to the LCD direct projection light path structure, a reasonable light path design is adopted, a reflective mirror is canceled, the utilization rate of light rays is improved by adopting a direct projection mode, and a projection image is formed through the 2.2-3.2 inch LCD screen, so that the image quality is improved. The rear Fresnel lens and the front Fresnel lens with proper focal lengths are matched at the same time, and the projection lens with short focal length is utilized, so that the light path can be shortened, the projection ratio is smaller than 1.2, the miniaturization of the LCD projector is realized, the edge light can be fully utilized, and the utilization rate of the light and the uniformity of illumination are improved.

The invention discloses a display method based on an LCD projector and the LCD projector, and relates to the field of projectors, and the method comprises the following steps: identifying a shielding object in a projection area of the LCD projector; performing face recognition on the shielded object, and if the shielded object contains a face, determining the shielded object as a shielded person; performing facial recognition on the shielded person to obtain a facial expression, and performing posture recognition on the shielded person to obtain a limb action; detecting the staying time of the shielded person in the projection area, and if the staying time is greater than a preset time threshold value, identifying whether the shielded person is a target person according to the facial expression and the body movement; if the person is the target person, determining a human body contour position in the projection area, and determining an occupied shielding projection area; and adjusting the projection parameters of the shielded projection area to enable the visibility of the shielded projection area to be higher than a preset visibility threshold. By implementing the method, the demonstration effect of the LCD projector can be improved.

The heat dissipation structure comprises a first heat dissipation unit, a second heat dissipation unit, a shell, an optical unit and a light source unit, the optical unit is contained in the shell, the light source unit is arranged at the tail end of the shell, an air inlet and an air outlet of the first heat dissipation unit are communicated with the shell, and an air outlet of the second heat dissipation unit is communicated with the shell. The heat conduction end of the second heat dissipation unit makes contact with the first heat dissipation unit and the light source unit so as to cooperate with the first heat dissipation unit to establish internal and external air cooling double circulation. Therefore, compact layout of the heat dissipation structure and the light path structure is achieved, dust is prevented from entering the LCD screen, and meanwhile the heat dissipation effect is improved.

A phase difference sheet including a substrate and a phase difference film as a tilt film, wherein, in a biaxial refractive index ellipsoid exhibiting a refractive index anisotropy, of three principal refractive indexes nx, ny, nz, the principal refractive index in the length direction of a columnar structure, i.e., the X-axis direction, is nx, the principal refractive index in the major axis direction of an ellipse perpendicular to the X-axis, i.e., the Y-axis direction, is ny, and the principal refractive index in the minor axis direction, i.e., the Z-axis direction, is nz, the following conditional expression (1) is satisfied, and, in a case where the incident angle of a direction tilted to the X-axis side with the normal as a reference is positive, the phase difference of incident light at an incident angle of +30° is Re(+30), the phase difference of incident light at an incident angle of -30° is Re(-30), and the ratio of Re(+30) to Re(-30), i.e., the phase difference ratio, is Re(30) ratio, the following conditional expression (2) is satisfied, ny > nx > nz (1), Re(30) ratio = Re(30) / Re(-30) = 1.1 to 4.0 (2).

The utility model relates to a closed light machine for a vertical projector and an LCD projector. The closed light machine comprises a housing, an internal circulation fan, an imaging assembly, a heat exchange module, a light source assembly, an external circulation fan and an LED radiator. The internal circulation fan is arranged in the shell, an internal circulation air channel communicated with an air inlet and an air outlet of the internal circulation fan is formed in the shell, the imaging assembly comprises an LCD screen located in the internal circulation air channel, air in the internal circulation air channel flows through the two opposite sides of the LCD screen, and the air in the internal circulation air channel is communicated with the air inlet and the air outlet of the internal circulation fan. The direction of air flowing through one side of the LCD screen is opposite to the direction of air flowing through the other side of the LCD screen, according to the closed light machine, heat dissipation is conducted on the LCD screen in an internal circulation mode, miniaturization of the light machine is facilitated, in addition, heat dissipation can be conducted on the hot face radiator and the LED radiator at the same time through the external circulation draught fan, and the overall layout is compact.

The utility model discloses a single LCD projection optical device which comprises a light source assembly, a front Fresnel lens, a polarized light brightness enhancement film, an LCD liquid crystal screen, a rear Fresnel lens, a reflector and a projection lens. According to the light path structure, the transmission type polarized light brightening film is used, after light emitted by the light source is subjected to polarized light brightening, P light penetrates through and irradiates the liquid crystal screen, most S light is reflected back to the Fresnel lens and the front-end optical system by the polarized light brightening film, the S light is depolarized after passing through all layers of materials of the Fresnel lens and the front-end optical system, and therefore the light path structure is formed. And after the light becomes full polarized light (P light and S light), the light is emitted out of the Fresnel lens and the front-end optical system again and is recycled, so that the lighting effect of the single-LCD projector can be greatly improved.

The invention relates to the technical field of projectors, and discloses a picture calibration method and device, a projector and a medium. The method comprises the following steps: acquiring attitude angle information and positioning and orientation information of a projection lens; the positioning and orientation information represents distances and directions of the projection lens relative to at least three non-collinear reference points in a projection plane; determining three-dimensional included angle information between the projection plane and the optical axis of the projection lens based on the attitude angle information and the positioning and orientation information; performing angle calculation on the LCD screen based on the three-dimensional included angle information so as to calculate a target pitch angle value and a target deflection angle value which the LCD screen needs to reach; and driving the screen adjusting component to adjust the angle of the LCD screen by taking the pitch angle and the deflection angle of the LCD screen respectively reaching the target pitch angle value and the target deflection angle value. According to the embodiment of the invention, the projection picture quality of the single-chip LCD projector during side projection can be improved.

The present invention discloses an intelligent dust monitoring and automatic dust removal system and method for LCD projectors, wherein the system comprises: a determination module for collecting dust data inside the LCD projector and determining dust accumulation conditions inside the LCD projector according to the dust data; a judgment module for judging whether dust removal is required and issuing a dust removal instruction according to dust accumulation conditions inside the LCD projector; a selection module for selecting a dust removal mechanism according to dust accumulation conditions and determining a dust removal mode based on the dust removal mechanism; and a dust removal module for performing intelligent dust removal inside the LCD projector according to the dust removal instruction and the dust removal mode. Selecting different dust removal mechanisms and dust removal modes to perform intelligent dust removal inside the LCD projector with the aid of an auxiliary dust removal component can not only maximize the dust removal effect but also realize flexible dust removal, effectively remove stubborn dust inside the LCD projector, and improve practicality, dust removal efficiency and reliability.

The invention discloses a double-LCD projector, two paths of LED light sources which are vertically arranged are adopted for illumination, the first path of LED light source in the two paths of LED light sources comprises a first LED light source, fluorescent powder, a light hopper, a first rear Fresnel lens, a first light filter, a first polaroid, a first LCD screen and a first front Fresnel lens which are sequentially arranged from back to front, and the fluorescent powder is arranged on the first LED light source; the second path of LED light source comprises a second LED light source, an aspherical lens, a reflector, a second rear Fresnel lens, a second optical filter, a second polaroid, a second LCD screen and a second front Fresnel lens which are sequentially arranged from back to front; the double-LCD projector further comprises a double-gluing two-phase-color light combining mirror, and the double-gluing two-phase-color light combining mirror, the first front Fresnel lens and the second front Fresnel lens are arranged in a 45-degree mode. According to the invention, the length-width ratio of a horizontal light path and a vertical light path can be effectively avoided, and the light deviation after light combination is reduced.

The utility model relates to a totally enclosed LCD projector heat radiation structure comprising a projector main body, the projector main body is provided with a heat radiation unit, the projector main body is provided with a fan corresponding to the heat radiation unit, the air outlet end of the fan forms an air channel, and the heat radiation unit is located in the air channel; the projector main body comprises a rack, a light machine main body, an LCD display screen, a reflection cup and a light source which are connected in sequence, the fan corresponds to the light machine main body, the LCD display screen and the reflection cup are arranged on the rack, and part of the light machine main body, the LCD display screen and the reflection cup are all located in the air duct. The heat dissipation unit is arranged corresponding to the light machine body, the part of the reflection cup located in the air channel, the LCD display screen and the light source. According to the totally-enclosed heat dissipation structure of the LCD projector, the heat dissipation problem of each heating part of the projector can be solved through a single fan, and a plurality of fans are not needed for heat dissipation, so that a structural frame is simple, the space utilization rate is maximized, an effective air duct is formed, and the totally-enclosed heat dissipation structure of the LCD projector has better market competitiveness.

A sound curve adjusting method, an LCD projector, a medium and a product relate to the projector field, and the method comprises the following steps: obtaining a first preset distance from a target projector to a target projection curtain, and obtaining a current picture size and a current definition of a picture projected by the target projector on the target projection curtain; calculating the maximum visual distance of the projection picture according to the current picture size, the current definition and a preset human eye vision range, and taking the maximum visual distance as a second preset distance; calculating the distance from the target projector to the target audience according to the first preset distance and the second preset distance to obtain a third preset distance; and matching a corresponding preset sound curve based on the third preset distance, and adjusting an output sound curve of the target projector according to the preset sound curve. By implementing the method, the auditory effect of the LCD projector can be improved.

The utility model discloses an internal and external circulation heat radiation system of a single-chip LCD projector, which comprises a second heat radiator, a single stator arranged on the inner side of a first heat radiator, a linkage rotor fan and a rotor fan which are connected with the single stator, and a third heat radiator arranged at an air outlet of the linkage rotor fan, the light cup and the LED lamp assembly are arranged at an air outlet of the third radiator, the first radiator is arranged at an air outlet of the rotor fan, the first Fresnel lens, the heat insulation glass and the LCD screen are vertically arranged at an air outlet of the first radiator at intervals, and the second Fresnel lens is arranged on the outer side of the LCD screen at intervals. The linkage rotor fan and the rotor fan are arranged at intervals, and the first Fresnel lens, the heat insulation glass and the LCD screen are arranged at intervals to form two sets of air channels. According to the utility model, the temperature of the liquid crystal screen can be effectively controlled, and the service life of the fan is effectively prolonged.

The embodiment of the invention provides a color cast correction method, device and equipment for a single-chip LCD projector and a computer readable storage medium. The method comprises the following steps: acquiring a current temperature in an optical machine cavity; if the temperature in the optical machine cavity is greater than the initial temperature, obtaining the color coordinate X-axis offset and the color coordinate Y-axis offset through a first preset algorithm based on the difference value between the temperature in the optical machine cavity and the initial temperature, and obtaining the color coordinate X-axis offset and the color coordinate Y-axis offset corresponding to the blue gain change through a second preset algorithm; calculating a gain value of blue; based on the gain value of the blue, the gain values of the red and the green are respectively calculated; and through the gain values of the blue, the red and the green, the LCD projector is dynamically adjusted. In this way, the user experience is greatly improved.

The disclosure provides a new field sequential single LCD projector, includes an LED light source, a collecting and collimating device, a light-combining and color-filtering device, an intermediate reflector, a focusing device, a light-homogenizing device, an outgoing lens, a LCD light valve, a field lens, an imaging reflector and a projection lens which are arranged in sequence according to the light traveling direction. The LED light source includes a red light source, a green light source and a blue light source. Compared with the existing full-color light valve technology, under the same technical condition, the efficiency of the light valve is greatly improved, the power of the light source is greatly reduced, and the image color gamut is greatly improved, so that the projector can output higher brightness and has vast market adaptability.

The invention discloses a single-chip LCD projection method, a projector and an optical system thereof. The optical system for the single-chip LCD projector comprises a light shaping component for converging, shaping and converting a light source into parallel light, a lens for projecting an image, and a light converging component for converging an image from a liquid crystal screen of the single-chip LCD projector to the lens; the light shaping component comprises a first condenser for converging and shaping the light source into a predetermined shape, a second condenser for converging and shaping again, and a rear Fresnel lens; the light from the second condenser is converted into parallel light by the rear Fresnel lens and then projected onto the liquid crystal screen of the single-chip LCD projector. By using a specific light shaping component, the single-chip LCD projector can be made not only compact in size, but also have improved picture uniformity and brightness, thereby improving the image effect of the single-chip LCD projector.

The invention relates to a double-fan light leakage prevention open type light machine and an LCD projector. The open type light machine comprises a light machine shell, an imaging assembly, a first fan, a second fan and an air outlet bend shell. The imaging assembly is arranged in the imaging cavity to divide the imaging cavity into a first cooling air duct, a second cooling air duct and a light emitting cavity, the light machine shell is further provided with an air inlet shading grating structure communicating with the top of the light emitting cavity, and a plurality of heat dissipation air inlet gaps are formed in the air inlet shading grating structure; the first fan is arranged below the ray machine shell, the second fan is arranged above the ray machine shell, and the first fan and the second fan are arranged in a central symmetry mode relative to the central point of the LCD screen when observed in the vertical direction; the air outlet bend shell communicates with the lower end of the second cooling air duct. According to the arrangement mode of the first draught fan and the second draught fan, the problem that the LCD screen color is not uniform is effectively solved, and the light leakage problem can be solved through the arrangement of the air inlet shading grating structure and the air outlet curve shell above the light machine shell.

The utility model relates to a phase change heat dissipation low-noise closed light machine and an LCD projector. The closed light machine comprises a shell, an optical device, an internal circulation fan and a heat dissipation module. An internal circulation air duct is formed in the shell, the optical device and the internal circulation fan are both arranged in the internal circulation air duct, and the optical device comprises an LCD screen; the heat dissipation module comprises a fin radiator and a heat sink component, the heat sink component with the phase change material is adopted in the closed light machine and serves as an external heat dissipation part of the closed light machine, heat dissipation is conducted on the fin radiator in a heat storage mode, and the heat dissipation efficiency of the heat sink component is improved. Compared with the prior art that an outer fan is arranged outside the shell to cool the heat dissipation system, the closed optical machine has the advantages of being reasonable in heat dissipation function, low in noise, convenient to use by a user, good in heat dissipation effect, high in heat dissipation efficiency and good in mute effect.

The utility model relates to a multi-fan heat dissipation open type optical machine and an LCD projector. The multi-fan heat dissipation open type optical machine comprises an optical machine shell, a first heat dissipation fan, a second heat dissipation fan and a bottom heat dissipation fan. An LCD screen is installed in the light machine shell, a heat dissipation air channel passing through the two sides of the LCD screen is formed in the light machine shell, the heat dissipation air channel is provided with an air inlet, a first air outlet and a second air outlet which are communicated with the outside, the air inlet and the first air outlet are located at the two opposite ends of the heat dissipation air channel in the horizontal direction, and the second air outlet is located at the bottom of the heat dissipation air channel in the vertical direction. According to the multi-fan heat dissipation open type optical machine, heat dissipation of the open type optical machine can be completed in a low-cost mode through the design of the air channels and the mutual cooperation effect of series connection of the fans under the condition that semiconductor chilling plates, a large number of radiators, liquid cooling and other heat dissipation modes are not used, airflow interference between the fans is avoided, smooth air flow is ensured, and the service life of the optical machine is prolonged. The heat dissipation efficiency is improved, the overall power consumption and size are reduced, and economy and high efficiency are achieved.

The utility model relates to a low-cost liquid crystal projector which comprises an LED lamp module, an optical polarizing film, a light hopper, an LCD light valve, a first Fresnel lens, a liquid crystal display screen, a second Fresnel lens, a reflecting mirror and a projection lens, and an optical path is arranged between the LED lamp module and the projection lens. The optical polarizing film, the light hopper, the LCD light valve, the first Fresnel lens, the liquid crystal display screen, the second Fresnel lens and the reflector are sequentially arranged at intervals in the length direction of an optical path. Through the front optical polarizer, the size of the optical polarizer does not need to be increased along with the enlargement of the size of the liquid crystal display screen, the cost of the optical polarizer is effectively reduced, and the overall production cost of the liquid crystal projector is further reduced.

The utility model relates to the technical field of cleaning tools, in particular to an LCD projector cooling fin automatic cleaning device which comprises a machine body, a connecting pipe and an auxiliary assembly, the connecting pipe is fixedly connected with the upper surface of the machine body, the connecting pipe is communicated with the inner wall of the machine body, the upper surface of the connecting pipe is fixedly connected with a guide shell, and the guide shell is communicated with the inner wall of the machine body. The guide shell is communicated with the inner wall of the connecting pipe, the inner wall of the guide shell is rotatably connected with a cleaning brush, the inner wall of the guide shell is provided with a driving mechanism, the cleaning brush is in bolted connection with the driving end of the driving mechanism, the driving mechanism is electrically connected with the machine body, and the auxiliary assembly is arranged on the inner wall of the machine body. According to the cleaning device, the auxiliary assembly is arranged, so that the storage capacity of the cleaning device is increased, the problems that the capacity is small when a dust collecting plate is adopted in the cleaning device, and part of dust easily falls into the cleaning device in the dismounting process are solved, and the practicability and stability of the cleaning device are further improved.

The present disclosure provides a LCD projector with multiple display screens and lenses, comprising: light sources, collimating lenses, LCD imagers, field lenses and imaging lenses; the collimating lenses, the LCD imagers, the field lenses and the imaging lenses are sequentially arranged on the optical path emitted by the light sources; the collimating lenses, the LCD imagers and the field lenses are all arranged in parallel; the vertical axes of the collimating lenses, the LCD imagers and the field lenses are maintained on the same axes as the vertical axes of the light emitted by the light sources; the light sources, the collimating lenses, the LCD imagers, the field lenses and the imaging lenses constitute a plurality of groups of imaging groups.

A display method based on an LCD projector and an LCD projector, relating to the field of projectors. The method includes: identifying an occluding object in the projection area of the LCD projector; performing face recognition on the occluding object, and if the occluding object contains a face, determining the occluding object as an occluding person; performing facial recognition on the occluding person to obtain facial expressions, and performing gesture recognition on the occluding person to obtain body movements; detecting the staying time of the occluding person in the projection area, and if the staying time is greater than a preset time threshold, identifying whether the occluding person is a target person according to the facial expressions and body movements; if it is a target person, determining the position of the human body contour in the projection area and determining the occluded projection area occupied; adjusting the projection parameters of the occluded projection area so that the visibility of the occluded projection area is higher than a preset visibility threshold. Implementing this method can improve the demonstration effect of the LCD projector.

The present invention discloses a heat reflection light valve of an LCD (Liquid Crystal Display) projector and a projector. The heat reflection light valve comprises an upper glass substrate, a lower glass substrate and a liquid crystal box clamped between the upper glass substrate and the lower glass substrate, and a TFT (Thin Film Transistor) array is produced on the lower glass substrate; and a CF (Color Filter), a BM (Black Matrix), an OC (Over Coater), a transparent electrode and a post spacer are produced on the upper glass substrate. A layer of reflection film for reflecting blue light is produced on the inner surface of the upper glass substrate, and the reflection film is not produced in a region corresponding to a blue filter matrix of the CF.

The single-piece LCD projection lens is formed by combining three different spherical lenses, the transfer function is larger than 50% at 14lp / mm, the TV distortion is smaller than 0.2%, and the single-piece LCD projection lens is suitable for a high-definition (1920 * 1080 resolution) single-piece 3.12-inch LCD projector. The focal length is 95 mm, the F / # is 2.8, and the projection ratio is 1.25.

The application relates to an active refrigeration type inner circulation heat dissipation LCD projector and a heat dissipation method, the projector comprising a shell, a first projection channel arranged vertically and a second projection channel arranged horizontally in the shell, a reflection module, an LCD panel module, a light collecting cover, a light source module and a lens module; an inner circulation heat dissipation channel is arranged in the shell, a semiconductor refrigeration module is arranged on the inner circulation heat dissipation channel, and an inner circulation fan for realizing air circulation is arranged; the inner circulation heat dissipation channel extends from the light inlet end of the first projection channel to the light outlet end of the second projection channel along the length direction of the first projection channel and the second projection channel in sequence, the LCD panel module is arranged on the inner circulation heat dissipation channel, and the inner circulation fan is arranged below the lens module; the semiconductor refrigeration module realizes active inner circulation heat dissipation, avoids dust from entering the projector, efficiently dissipates heat for the LCD panel module, and fully utilizes the position below the lens module to arrange the inner circulation fan.

The utility model discloses a closed LCD projector with double supports, and relates to the technical field of projector equipment. The upper cover is connected with the partition type bottom shell, the projector shell is connected with the partition type bottom shell, the front end of one side of the partition type bottom shell is a display area cavity, the rear end of one side of the partition type bottom shell is an LED light source cavity, the rear end of the display area cavity is provided with a vertically-placed display screen, and the rear end of the display screen is provided with a horizontally-placed first cooling fin set. The projector comprises a projector shell, a display area cavity is arranged in the projector shell, a horizontally-placed second cooling fin set is arranged on the side portion of the display area cavity, movable supports are arranged on the two sides of the projector shell, the first support and the second support are movably connected through fixing nails, and the partition type projector shell is arranged, and cooling fins are arranged in the projector shell for heat dissipation. The rear end of the partition closed shell is further provided with a heat conduction fan for heating the cooling fins to dissipate heat, so that closed cooling is achieved, meanwhile, the projector is supported through the movable double supports, the projector can be conveniently placed on a table top and hung for use, and better use experience is brought to a user.

The utility model discloses a single-chip LCD projector. The single-chip LCD projector comprises an illumination system and a projection imaging system, the lighting system comprises an LED lamp panel, a reflection cup, a first Fresnel lens and heat insulation glass, wherein the reflection cup, the first Fresnel lens and the heat insulation glass are sequentially arranged in the propagation direction of emergent light of the LED lamp panel. The length of the effective light-emitting face of the LED lamp panel is not smaller than 9 mm and not larger than 11.5 mm, the width of the effective light-emitting face of the LED lamp panel is not smaller than 6 mm and not larger than 9 mm, the length of an incidence opening of the reflection cup is not smaller than 10 mm and not larger than 12.5 mm, the width of the incidence opening is not smaller than 7 mm and not larger than 10 mm, the length of an exit opening is not smaller than 82 mm and not larger than 84 mm, the width of the exit opening is not smaller than 45 mm and not larger than 48 mm, the vertical height of the exit opening is not smaller than 44 mm and not larger than 46 mm, and the length of the first Fresnel lens is not smaller than 85 mm and not larger than 90 mm. The width is not smaller than 49 mm and not larger than 53 mm, the thickness is not smaller than 1.6 mm and not larger than 2.2 mm, and the focal length is not smaller than 55 mm and not larger than 65 mm; the projection imaging system comprises an LCD liquid crystal light valve and a projection lens, and the LCD liquid crystal light valve is arranged on the side, back to the first Fresnel lens, of the heat insulation glass.

The utility model discloses a liquid crystal projector and an optical system thereof, the optical system of the liquid crystal projector comprises a light source, a liquid crystal panel and a liquid crystal light valve located between the light source and the liquid crystal panel, and the liquid crystal light valve is stacked on the liquid crystal panel; the liquid crystal panel comprises a plurality of display units which are uniformly arranged; the liquid crystal light valve comprises a plurality of light valve units which are in one-to-one correspondence with the display units; the light valve unit is configured to transmit or cut off light emitted from the light source to the corresponding display unit; according to the projector, the problem that the contrast ratio cannot be improved by partition dimming when an LED light source is matched with an LCD display screen in an existing projector can be solved.

The application relates to a high-definition LCD projector with a self-cleaning lens module. The air flow curtain in a sag state plays the role of effectively closing and isolating the lens from external dust for a long time. When needed, the air flow is bidirectionally flowed on the air flow curtain, the air flow is sprayed to the lens surface in a ring-shaped dispersion state, the surface dust of the lens is blown away, the air containing dust is backflowed to the air flow curtain, the lens is blown away again after purification, the frequency of personnel climbing for cleaning is reduced, the risk of personnel climbing for cleaning is reduced, the dust removal filter element and the water tank are combined, the backflowing air is double purified, the cleaning effect on the lens is effectively improved, the dust removal filter element is placed in the water tank to be wet, the manual cleaning process of the lens is realized, personnel do not need to carry cleaning tools when cleaning the lens, and the inconvenience and danger of personnel climbing are reduced.

1. The name of the product of this design: LCD projector (Z9). 2. Purpose of this design product: used for projector. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: Stereoscopic diagram 1.