CN108803204A - Projector and operating method of projector - Google Patents

Abstract

The invention provides a projector and an operation method of the projector, the projector comprises: an input device for receiving an input signal; a digital micro reflector for reflecting an optical signal processed by a lens set; a filter; a lens; a motor coupled to the filter; and a controller for controlling the motor to move the filter between the digital micromirror and the lens when receiving the input signal, so that the filter filters a portion of the optical signal reflected by the digital micromirror, the portion having a specific wavelength range, and transmits the optical signal filtered by the filter to a projection screen through the lens.

Description

Projector and how to operate the projector

technical field

The invention relates to a projection technology of a projector, in particular to a projection technology for filtering light of a specific wavelength band in a projector.

Background technique

At present, there are more and more opportunities for users to use electronic devices (such as 3C products), and the blue light displayed by the 3C products belongs to a high-energy waveband. If the user uses 3C products for a long time, it is easy to damage the user's eyes.

At present, electronic devices such as smart phones, LCD screens and LCD TVs all have the function of filtering blue light, but only projectors do not have this function. In addition, projectors are brighter than smartphones, LCD screens, and LCD TVs. Therefore, the projector should need to add a function of filtering blue light to protect the eyes.

Contents of the invention

In order to solve this problem, the present invention provides a projector, in which a filter for filtering out blue light is added in its projection path, so as to filter out blue light in the external environment.

The present invention provides a projector, comprising: an input device, used to receive an input signal; a digital miniature mirror, used to reflect a light signal processed by a lens group; a filter; a lens; a motor, coupled to the above-mentioned filter; and a controller for controlling the above-mentioned motor to move the above-mentioned filter between the above-mentioned digital micromirror and the above-mentioned lens when receiving the above-mentioned input signal, so that the above-mentioned filter filters out the The portion of the optical signal reflected by the digital miniature mirror has a specific wavelength range, and the optical signal filtered by the filter is transmitted to a projection screen through the lens.

The present invention provides a method for operating a projector, the projector includes an input device, a digital miniature mirror, a filter, a lens, a motor, a plurality of lens groups and a controller, and the steps of the operation method include : receiving an input signal from the above-mentioned input device; controlling the above-mentioned motor to move the above-mentioned filter to between the above-mentioned digital micro-mirror and the above-mentioned lens according to the above-mentioned input signal received; A portion of an optical signal reflected by the digital micro-mirror with a specific wavelength range, wherein the above-mentioned optical signal is processed by the above-mentioned lens group and transmitted to the above-mentioned digital micro-mirror; the light filtered by the above-mentioned filter is passed through the above-mentioned lens The signal is sent to a projection screen.

Description of drawings

FIG. 1 is a block diagram of a projector and a projection screen in an embodiment of the present invention;

Fig. 2 is a block diagram of a lens group in the embodiment of the present invention;

FIG. 3 is a flowchart of a projector in an embodiment of the present invention.

Explanation of reference signs:

100～projector 102～bulb

104～lens group 1041～infrared light/ultraviolet light filter

1042～color wheel 1043～integral column

1044～relay lens 106～digital miniature mirror

108～filter 110～lens

112～input device 114～controller

116～motor 118～projection screen

S1, S2～optical signal S10, S20, S30～step

Detailed ways

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

FIG. 1 is a block diagram of a projector 100 and a projection screen 118 according to an embodiment of the present invention. As shown in FIG. 1 , the projector 100 includes a light bulb 102 , a lens group 104 , a digital micromirror 106 , a filter 108 , a lens 110 , an input device 112 , a controller 114 and a motor 116 .

The bulb 102 is used as a light signal and transmits the light signal to the lens group 104 of the projector 100 . In another embodiment of the present invention, the bulb 102 is used to transmit a light signal to the lens group 104 and the input device 112 of the projector 100 . Lens group 104 is made up of an infrared light/ultraviolet light filter 1041, a color wheel 1042, an integrating column 1043 and a relay lens 1044, the infrared light/ultraviolet light filter 1041, the color wheel 1042, the integrating column 1043 and the center The connection relationship of the relay lens 1044 is as described in FIG. 2 , so the present invention will not be described here.

The digital micromirror 106 is used to receive the processed optical signal from the lens group 104 and transmit the processed optical signal S2 to the filter 108 or the lens 110 . The filter 108 is used to filter out a part of a specific wavelength range in the optical signal. In an embodiment of the present invention, the filter 108 is a blue light filter for filtering blue light with a wavelength range of 380nm-480nm.

The lens 110 is used to transmit the filtered light signal to the projection screen 118 through the lens 110 . The input device 112 is used for receiving an input signal. In an embodiment of the present invention, the input device 112 is a physical button on the projector 100. In this embodiment, the input signal is a pressing signal generated by the user pressing the physical button.

In some embodiments of the present invention, the controller 114 can be integrated into a processor, and the processor can be a single processor or multiple processors. A processor may include, for example, a combination of general purpose microprocessors, special purpose processors and/or related chipsets. Examples of combinations of general-purpose microprocessors and special-purpose processors are instruction-set processors, graphics processors, video processors, audio processors, and/or special-purpose microprocessors. The function of the processor is mainly to provide the processing capability required by the functions of the projector 100 for execution, programs, GUI, software, modules, application programs and the projector 100 . The motor 116 is used to drive certain electronic components in the projector 100 . In an embodiment of the present invention, the motor 116 moves the filter 108 between the digital micromirror 106 and the lens 110 after receiving a control signal from the controller 114 .

FIG. 2 is a block diagram of a lens group 104 in an embodiment of the present invention. As shown in FIG. 2 , the infrared/ultraviolet filter 1041 is disposed between the light bulb 102 and the color wheel 1042 to filter out ultraviolet light and infrared light in the light signal from the light bulb 102 . The color wheel 1042 is disposed between the infrared/ultraviolet filter 1041 and the integrating column 1043 , and is used for color-separating and focusing the optical signal filtered by the infrared/ultraviolet filter 1041 into the integrating column 1043 . The integrating column 1043 is disposed between the color wheel 1042 and the relay lens 1044 to homogenize the color-separated optical signal. The relay lens 1044 is arranged between the integrating column 1043 and the digital micromirror 106, and is used to amplify the light signal homogenized in the integrating column 1043 as a processed optical signal S2, and convert the processed light The signal S2 is sent to the digital micromirror 106 .

In some embodiments of the present invention, bulb 102, lens group 104 (IR/UV filter 1041, color wheel 1042, integrating cylinder 1043, relay lens 1044), digital micromirror 106, filter 108, And the projection screens 118 are arranged in sequence to form a projection path. In some other embodiments, bulb 102, lens set 104 (IR/UV filter 1041, color wheel 1042, integrating cylinder 1043, relay lens 1044), digital micromirror 106, filter 108, and projection The arrangement order of the screens 118 can also be appropriately changed according to requirements. In this projection path, the light signal S1 from the light bulb 102 is processed by the lens group 104 to be the light signal S2, and the light signal S2 is reflected by the digital micro-mirror 106 to the filter 108, and the filter 108 filters out the signal generated by the digital micro-mirror. The portion of the optical signal reflected by 106 has a specific wavelength range, and the optical signal filtered by the filter 108 is transmitted to the projection screen 118 through the lens 110 . In some embodiments of the present invention, the filter 108 may be a blue light filter.

FIG. 3 is a flowchart of a projector 100 in an embodiment of the present invention. First, in step S10 , the controller 114 determines whether an input signal from the input device 112 is received. In an embodiment of the present invention, the input signal may be generated by a user pressing a physical button, and the input device may be a physical button on the projector 100 . If the controller 114 determines that no input signal from the input device 112 is received, the process proceeds to step S20. In step S20 , the light signal S1 from the light bulb 102 is processed by the lens group 104 to be the light signal S2 , and the light signal S2 is reflected by the digital micro-mirror 106 and directly transmitted to the projection screen 118 through the lens 110 . If the controller 114 determines that the input signal from the input device 112 is received, the process proceeds to step S30. In step S30, the controller 114 controls the motor 116 to move the filter 108 between the digital micro-mirror 106 and the lens 110, so that the filter 108 filters out the optical signal reflected by the digital micro-mirror 106 with a specific part of the wavelength range, and the optical signal filtered by the filter 108 is transmitted to the projection screen 118 through the lens 110 . In an embodiment of the present invention, the blue light includes blue-violet light with a wavelength of 380 nm-440 nm and blue light with a wavelength of 440 nm-480 nm. In an embodiment of the present invention, the intensity of the light signal from the bulb 102 is greater than 100 nits (nit), and the filter 108 can be a blue light filter, which only allows light signals with a wavelength greater than 440 nanometers (reserving blue light ) to filter out optical signals with other wavelengths (filter all blue-violet light), and the lens 110 transmits the optical signals filtered by the filter 108 to the projection screen 118 . In another embodiment of the present invention, the filter 108 may be a blue light filter, allowing light signals with a wavelength greater than 440 nanometers to pass through (retaining blue light), and light signals with a wavelength of 428 nanometers to 440 nanometers with a specific Ratio passing (filtering part of blue-violet light), filtering out optical signals with other wavelengths, the lens 110 transmits the optical signals filtered by the filter 108 to the projection screen 118, wherein the specific ratio is determined by the material of the filter 108 . In another embodiment of the present invention, the filter 108 may be a red light filter, or the like, but the present invention is not limited thereto.

To sum up, the projector 100 can determine whether to enable the blue light filtering function of the projector 100 according to the user's decision, so as to prevent the user's eyes from being damaged by high-energy blue light.

The above implementation is only used to illustrate the technical solution of the present invention and not to limit it. Those skilled in the art can modify or equivalently replace the technical solution of the present invention without departing from the spirit and scope of the present invention. Protection of the present invention The scope should be defined by the claims.

Claims (10)

1. a kind of projector, including：

One input unit, to receive an input signal；

One digital minitype reflector, treated reflecting a lens group optical signal；

One filter；

One camera lens；

One motor couples above-mentioned filter；And

One controller, to when receiving above-mentioned input signal, control said motor is above-mentioned above-mentioned filter to be moved to Between digital minitype reflector and above-mentioned camera lens, cause above-mentioned filter filter out reflected by above-mentioned digital minitype reflector it is upper The part with a particular range of wavelengths in optical signal is stated, and by above-mentioned camera lens by the light after above-mentioned filter filters out Signal is sent to a projection screen.

2. projector as described in claim 1, which is characterized in that when above controller does not receive above-mentioned input signal, Treated that above-mentioned optical signal is directly sent to above-mentioned projection screen by above-mentioned camera lens for said lens group.

3. projector as described in claim 1, which is characterized in that above-mentioned filter be a blue filter, to filter out by Blue light components in the above-mentioned optical signal that above-mentioned digital minitype reflector is reflected.

4. projector as described in claim 1, which is characterized in that said lens group include one infrared light/ultraviolet filter, Color wheel, an integration rod, multiple relay lens.

5. projector as claimed in claim 4, which is characterized in that above-mentioned infrared light/ultraviolet filter is set to a light bulb Between above-mentioned colour wheel, to filter out the ultraviolet light and infrared light in the optical signal from above-mentioned light bulb.

6. projector as claimed in claim 5, which is characterized in that above-mentioned colour wheel is set to above-mentioned infrared light/ultraviolet filtering Between device and above-mentioned integration rod, by the optical signal color separation after above-mentioned infrared light/ultraviolet filter filters out and to focus to In above-mentioned integration rod.

7. projector as claimed in claim 6, which is characterized in that above-mentioned integration rod be set to above-mentioned colour wheel among the above after saturating Between mirror, the optical signal after color separation to be homogenized.

8. projector as claimed in claim 7, which is characterized in that above-mentioned relay lens is set to above-mentioned integration rod and above-mentioned number Between word minitype reflector, to by after the optical signal amplification after being homogenized in above-mentioned integration rod using as above-mentioned optical signal, And above-mentioned optical signal is sent to above-mentioned digital minitype reflector.

9. a kind of operating method of projector, the projector includes an input unit, a digital minitype reflector, a filtering Device, a camera lens, a motor, multiple lens groups and a controller, the operating method step include：

Receive the input signal from above-mentioned input unit；

According to received above-mentioned input signal, control said motor is anti-above-mentioned filter is moved to above-mentioned digital micro It penetrates between mirror and above-mentioned camera lens；

Being filtered out by above-mentioned filter has a specific wavelength model in the optical signal reflected by above-mentioned digital minitype reflector The part enclosed, wherein above-mentioned optical signals said lens group is handled and is sent to above-mentioned digital minitype reflector；

Optical signal after being filtered out above-mentioned filter by above-mentioned camera lens is sent to a projection screen.

10. the operating method of projector as claimed in claim 9, which is characterized in that above-mentioned filter is a blue filter, To filter out the blue light components in the above-mentioned optical signal reflected by above-mentioned digital minitype reflector, and said lens group includes One infrared light/ultraviolet filter, color wheel, an integration rod, multiple relay lens, the operating method of above-mentioned projector are also wrapped It includes：

The ultraviolet light and infrared light in the optical signal from a light bulb are filtered out by above-mentioned infrared light/ultraviolet filter；

By the optical signal color separation after above-mentioned infrared light/ultraviolet filter filters out and above-mentioned integral is focused to by above-mentioned colour wheel In column；

The optical signal after color separation is homogenized by above-mentioned integration rod；

By above-mentioned relay lens by after the optical signal amplification after being homogenized in above-mentioned integration rod using as above-mentioned optical signal, and will Above-mentioned optical signal is sent to above-mentioned digital minitype reflector.