CN108803204B

CN108803204B - Projector and operating method of projector

Info

Publication number: CN108803204B
Application number: CN201710295846.6A
Authority: CN
Inventors: 吴书贤; 林明立; 陈信宇
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2017-04-28
Filing date: 2017-04-28
Publication date: 2021-03-12
Anticipated expiration: 2037-04-28
Also published as: CN108803204A

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 operating method of projector

Technical Field

The present invention relates to a projection technology of a projector, and more particularly, to a projection technology of a projector for filtering out light having a wavelength of a specific wavelength band.

Background

At present, users are more and more likely to use electronic devices (e.g., 3C products), wherein the blue light portion displayed by the 3C products belongs to a high-energy band. The user's eyes are easily injured if the user uses the 3C product for a long time.

At present, electronic devices such as smart phones, liquid crystal screens and liquid crystal televisions have a function of filtering blue light, and only projectors do not have the function. In addition, the brightness of the projector is higher than that of the smart phone, the liquid crystal screen and the liquid crystal television. Therefore, the projector should further need to add a function of filtering blue light to protect eyes.

Disclosure of Invention

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

The invention provides a projector, comprising: 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.

The invention provides an operation method of a projector, the projector comprises an input device, a digital micro reflector, a filter, a lens, a motor, a plurality of lens groups and a controller, the operation method comprises the following steps: receiving an input signal from the input device; controlling the motor to move the filter between the digital micromirror and the lens according to the received input signal; and filtering out a part with a specific wavelength range in an optical signal reflected by the digital micro reflector through the filter, wherein the optical signal is processed by the lens group and transmitted to the digital micro reflector; and transmitting the optical signal filtered by the filter to a projection screen through the lens.

Drawings

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

FIG. 2 is a block diagram of a lens assembly in an embodiment of the present invention;

fig. 3 is a flowchart of a projector according to an embodiment of the invention.

Description of reference numerals:

100-projector 102-bulb

104 lens group 1041 infrared/ultraviolet filter

1042 color wheel 1043 integration column

1044 relay lens 106 digital micromirror

108 filter 110 lens

112 input device 114 controller

116 motor 118 projection screen

S1, S2-optical signals S10, S20, S30-steps

Detailed Description

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

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

The lamp 102 is used as an optical signal and transmits the optical signal to the lens assembly 104 of the projector 100. In another embodiment of the present invention, the lamp 102 is used to emit a light signal to the lens assembly 104 and the input device 112 of the projector 100. The lens assembly 104 is composed of an ir/uv filter 1041, a color wheel 1042, an integrating rod 1043 and a relay lens 1044, and the connection relationship of the ir/uv filter 1041, the color wheel 1042, the integrating rod 1043 and the relay lens 1044 is as described in fig. 2, so the invention is not described herein.

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

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 invention, the input device 112 is a physical button on the projector 100, and in this embodiment, the input signal is a pressing signal generated by a user pressing the physical button.

In some embodiments of the present invention, the controller 114 may be integrated into a processor, which may be a single processor or multiple processors. For example, the processor may include a general purpose microprocessor, a combination of special purpose processors, and/or an associated chipset. Examples of combinations of general purpose and special purpose processors are instruction-set processors (instruction-set processors), graphics processors, video processors, audio processors, and/or special purpose microprocessors. The processor functions primarily to provide the processing power required to execute, program, user graphical interface, software, modules, applications, and functions of projector 100. The motor 116 is used to drive some electronic components in the projector 100. In one embodiment of the present invention, the motor 116 moves the filter 108 between the digital micromirror 106 and the lens 110 after receiving the control signal from the controller 114.

FIG. 2 is a block diagram of a lens assembly 104 according to an embodiment of the present invention. As shown in fig. 2, the ir/uv filter 1041 is disposed between the bulb 102 and the color wheel 1042 for filtering out uv light and ir light from the light signal of the bulb 102. The color wheel 1042 is disposed between the infrared/ultraviolet filter 1041 and the integrating rod 1043, and is used for separating colors of the optical signal filtered by the infrared/ultraviolet filter 1041 and focusing the optical signal into the integrating rod 1043. The integrating rod 1043 is disposed between the color wheel 1042 and the relay lens 1044 for homogenizing the color-separated light signals. The relay lens 1044 is disposed between the integrating rod 1043 and the digital micromirror 106, and is used to amplify the optical signal homogenized in the integrating rod 1043 to be a processed optical signal S2, and transmit the processed optical signal S2 to the digital micromirror 106.

In some embodiments of the present invention, the lamp 102, the lens assembly 104 (ir/uv filter 1041, the color wheel 1042, the integrator rod 1043, the relay lens 1044), the digital micromirror 106, the filter 108, and the projection screen 118 are sequentially arranged to form a projection path. In some other embodiments, the arrangement of the lamp 102, the lens assembly 104 (the ir/uv filter 1041, the color wheel 1042, the integration rod 1043, the relay lens 1044), the digital micromirror 106, the filter 108, and the projection screen 118 may be modified as required. In the projection path, the light signal S1 from the lamp 102 is processed by the lens assembly 104 as the light signal S2, the light signal S2 is reflected by the digital micromirror 106 to the filter 108, the filter 108 filters a portion of the light signal reflected by the digital micromirror 106, the portion having a specific wavelength range, and the light 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 filter.

Fig. 3 is a flowchart of a projector 100 according to an embodiment of the invention. First, in step S10, the controller 114 determines whether an input signal is received from the input device 112. In an embodiment of the 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 is received from the input device 112, the process proceeds to step S20. In step S20, the light signal S1 from the light bulb 102 is processed by the lens assembly 104 as the light signal S2, and the light signal S2 is reflected by the digital micromirror 106 and then 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 micromirror 106 and the lens 110, so that the filter 108 filters a portion of the optical signal reflected by the digital micromirror 106, which has a specific wavelength range, and transmits the optical signal filtered by the filter 108 to the projection screen 118 through the lens 110. In one embodiment of the present invention, the blue light includes blue-violet light having a wavelength of 380 nm to 440 nm and blue light having a wavelength of 440 nm to 480 nm. In an embodiment of the present invention, the intensity of the light signal from the lamp 102 is greater than 100 nit, the filter 108 can be a blue filter, which only allows the light signal with a wavelength greater than 440 nm (blue light is retained), and filters the light signal with other wavelengths (all blue-violet light is filtered), and the lens 110 transmits the light signal filtered by the filter 108 to the projection screen 118. In another embodiment of the present invention, the filter 108 can be a blue filter, which allows the optical signals with a wavelength greater than 440 nm to pass (retaining blue light), the optical signals with a wavelength of 428 nm to 440 nm to pass at a specific ratio (filtering out part of the blue-violet light) and filter out the optical signals with other wavelengths, and the lens 110 transmits the optical signals filtered out 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 filter, and the like, but the present invention is not limited thereto.

In summary, the projector 100 can determine whether to start the function of filtering blue light in the projector 100 according to the user's determination, so as to prevent the eyes of the user from being damaged by the high-energy blue light.

The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and a person skilled in the art can make modifications or equivalent substitutions to the technical solution of the present invention without departing from the spirit and scope of the present invention, and the scope of the present invention should be determined by the claims.

Claims

1. A projector, comprising:

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;

when the controller does not receive the input signal, the optical signal processed by the lens group is directly transmitted to the projection screen through the lens.

2. The projector as claimed in claim 1, wherein said filter is a blue filter for filtering out a blue portion of said optical signal reflected by said digital micromirror.

3. The projector as claimed in claim 1, wherein said lens assembly includes an ir/uv filter, a color wheel, an integrator rod, and a plurality of relay lenses.

4. The projector as claimed in claim 3, wherein the IR/UV filter is disposed between a lamp and the color wheel for filtering UV and IR light from the light signal from the lamp.

5. The projector as claimed in claim 4, wherein the color wheel is disposed between the IR/UV filter and the integration rod for separating colors of the light signals filtered by the IR/UV filter and focusing the light signals into the integration rod.

6. The projector as claimed in claim 5, wherein the integration rod is disposed between the color wheel and the relay lens for homogenizing the color-separated optical signal.

7. The projector according to claim 6, wherein the relay lens is provided between the integration rod and the digital micromirror, and amplifies the optical signal homogenized in the integration rod as the optical signal, and transmits the optical signal to the digital micromirror.

8. An operating method of a projector, the projector including an input device, a digital micromirror, a filter, a lens, a motor, a plurality of lens groups, and a controller, the operating method comprising:

receiving an input signal from the input device;

controlling the motor to move the filter between the digital micromirror and the lens according to the received input signal;

filtering out a part with a specific wavelength range in an optical signal reflected by the digital micro reflector through the filter, wherein the optical signal is processed by the lens group and is transmitted to the digital micro reflector;

transmitting the optical signal filtered by the filter to a projection screen through the lens;

the filter is a blue filter for filtering out blue light part in the optical signal reflected by the digital micro reflector, and the lens assembly includes an infrared/ultraviolet filter, a color wheel, an integration rod, and a plurality of relay lenses, the operation method of the projector further includes:

filtering ultraviolet light and infrared light in an optical signal from a bulb by the infrared light/ultraviolet light filter;

the optical signals filtered by the infrared light/ultraviolet light filter are subjected to color separation and are focused into the integrating column through the color wheel;

homogenizing the light signals after color separation through the integration column;

the optical signal homogenized in the integration rod is amplified by the relay lens to be used as the optical signal, and the optical signal is transmitted to the digital micro-mirror.