TWI626502B - Projector and operation method thereof - Google Patents

Abstract

A projector comprising: an input device for receiving an input signal; a digital micro mirror for reflecting a photo signal processed by a lens group; 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 out the digital micro mirror The reflected optical signal has a portion of a specific wavelength range, and the optical signal filtered by the filter is transmitted to a projection screen through the lens.

Description

Projector and projector operation method

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

At present, users are increasingly using electronic devices (for example, 3C products), and the blue portion displayed by 3C products belongs to a high-energy band. If the user uses the 3C product for a long time, the user's eyes are easily injured.

At present, smart phones, LCD screens, and LCD TVs, and the like, all have the function of filtering out blue light, and only the projector does not have this function. In addition, the brightness of the projector is higher than that of smart phones, LCD screens and LCD TVs. Therefore, the projector should need to add a function of filtering out blue light to protect the eyes.

In order to solve this problem, the present invention provides a projector that incorporates a blue light filtering filter in its projection path to filter out blue light in the environment.

The present invention provides a projector comprising: a projector comprising: an input device for receiving an input signal; a digital micro mirror, a light source for reflecting a lens group; a filter; a lens; a motor coupled to the filter; and a controller for controlling the motor to receive the input signal And moving the filter between the digital micromirror and the lens, so that the filter filters out a portion of the optical signal reflected by the digital micromirror and has a specific wavelength range, and passes the filtering through the lens The filtered optical signal is transmitted to a projection screen.

The invention provides a method for operating a projector, comprising: a method for operating a projector, wherein the projector comprises an input device, a digital micro mirror, a filter, a lens, a motor, a plurality of lens groups and a The controller includes: 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 transmitting the filter Filtering a portion of the optical signal reflected by the digital micromirror having a specific wavelength range, wherein the optical signal is processed by the lens group and transmitted to the digital micro mirror; and the filter is filtered through the lens The optical signal is transmitted to a projection screen.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

100‧‧‧Projector

102‧‧‧Light bulb

104‧‧‧ lens group

1041‧‧‧Infrared/UV filter

1042‧‧‧ color wheel

1043‧‧Integral column

1044‧‧‧Relay lens

106‧‧‧Digital reflectors

108‧‧‧ filter

110‧‧‧ lens

112‧‧‧ Input device

114‧‧‧ Controller

116‧‧‧Motor

118‧‧‧Projection screen

S1, S2‧‧‧ Optical Signal

S10, S20, S30‧‧‧ steps

1 is a block diagram showing a projector and a projection screen in an embodiment of the present invention; 2 is a block diagram showing a lens group in an embodiment of the present invention; and FIG. 3 is a flow chart showing one of the projectors in the embodiment of the present invention.

The methods of making and using various embodiments of the present invention are discussed in detail below. However, it is to be noted that many of the possible inventive concepts provided by the present invention can be implemented in various specific ranges. These specific examples are merely illustrative of the methods of making and using the invention, but are not intended to limit the scope of the invention.

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

The light bulb 102 is used as an optical signal and emits optical signals to the lens group 104 of the projector 100. In another embodiment of the present invention, the light bulb 102 is configured to emit an optical signal to the lens group 104 of the projector 100 and the input device 112. The lens group 104 is composed of an infrared/ultraviolet filter 1041, a color wheel 1042, an integrating column 1043 and a relay lens 1044. The infrared light/ultraviolet filter 1041, the color wheel 1042, the integral column 1043 and the middle The function of the lens 1044 is as described in FIG. 2, so the present invention will not be described here.

The digital micro-reflector 106 is configured to receive the optical signal processed from the lens group 104 and transmit the processed optical signal S2 to the filter 108 or the lens 110. Filter 108 is used to filter out portions of a particular wavelength range of the optical signal. In one embodiment of the invention, the filter 108 is a blue light filter for filtering out blue light having a wavelength in the range of 380 nm to 480 nm.

The lens 110 is used to make the filtered optical signal pass through the lens 110 is transmitted to the projection screen 118. The input device 112 is configured to receive an input signal. In one 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 caused by a user pressing a button.

In some embodiments of the invention, the controller 114 can be integrated into a processor, which can be a single processor or a plurality of processors. For example, the processor can include a general purpose microprocessor, a combination of special purpose processors, and/or associated 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 functions of the processor are primarily to provide the processing power required for execution, program, user graphical interface, software, modules, applications, and projector 100 functions. Motor 116 is used to drive certain electronic components in projector 100. In one embodiment of the invention, the motor 116 moves the filter 108 between the digital micro-reflector 106 and the lens 110 upon receipt of the control signal from the controller 114.

Figure 2 is a block diagram showing a lens group 104 in an embodiment of the present invention. As shown in FIG. 2, an infrared/ultraviolet filter 1041 is disposed between the bulb 102 and the color wheel 1042 for filtering ultraviolet light and infrared light from the light signal of the bulb 102. The color wheel 1042 is disposed between the infrared light/ultraviolet filter 1041 and the integrating column 1043 for separating and filtering the optical signal filtered by the infrared light/ultraviolet filter 1041 into the integrating column 1043. The integrating column 1043 is disposed between the color wheel 1042 and the relay lens 1044 for homogenizing the color signals after the color separation. The relay lens 1044 is disposed between the integrating column 1043 and the digital micro mirror 106 for amplifying the optical signal that is equalized in the integrating column 1043 as a processing. The subsequent optical signal S2 transmits the processed optical signal S2 to the digital micro mirror 106.

In some embodiments of the present invention, the bulb 102, the lens group 104 (infrared/ultraviolet filter 1041, color wheel 1042, integrating column 1043, relay lens 1044), digital micro-reflector 106, filter 108, And the projection screens 118 are sequentially arranged to form a projection path. In some embodiments, the bulb 102, lens group 104 (infrared/ultraviolet filter 1041, color wheel 1042, integrating column 1043, relay lens 1044), digital micro-reflector 106, filter 108, and projection screen The order of 118 can also be appropriately changed as required. In this projection path, the optical signal S1 from the bulb 102 is processed by the lens group 104 as the optical signal S2, and the optical signal S2 is reflected by the digital micro mirror 106 to the filter 108, and the filter 108 filters out the digital micro mirror. The light signal reflected by 106 has a portion of 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 invention, filter 108 can be a blue light filter.

FIG. 3 is a flow chart showing a projector 100 in an embodiment of the present invention. First, in step S10, the controller 114 determines whether or not to receive an input signal from the input device 112. In one embodiment of the invention, the input signal can be caused by a user pressing a physical button, and the input device can be a physical button on the projector 100. If the controller 114 determines that it has not received any input signal from the input device 112, it proceeds to step S20. In step S20, the optical signal S1 from the bulb 102 is processed by the lens group 104, and then reflected by the digital micro mirror 106 as the optical signal S2 and the optical signal S2, and then transmitted directly to the projection screen 118 through the lens 110. If the controller 114 determines that there is reception from the input device If the input signal of 112 is entered, 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, such that the filter 108 filters out a specific one of the optical signals reflected by the digital micro mirror 106. A portion of the wavelength range, and the optical signal filtered by the filter 108 is transmitted through the lens 110 to the projection screen 118. In one embodiment of the invention, the blue light comprises blue-violet light having a wavelength of 380 nanometers (nm) to 440 nanometers and blue light having a wavelength of 440 nanometers to 480 nanometers. In one embodiment of the invention, the intensity of the optical signal from the bulb 102 is greater than 100 nits, and the filter 108 can be a blue light filter that allows only optical signals having a wavelength greater than 440 nm (retained blue) The color light passes through, filters out optical signals having other wavelengths (filters out 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 can be a blue light filter that allows optical signals having a wavelength greater than 440 nm to pass (retain blue light) and optical signals having a wavelength of 428 nm to 440 nm. A specific ratio is passed (filtering out part of the blue-violet light) to filter out optical signals having other wavelengths, and the lens 110 transmits the optical signal filtered by the filter 108 to the projection screen 118, wherein the specific ratio is determined by the material of the filter 108. Determined. In another embodiment of the present invention, the filter 108 can be a red optical filter, and the like, but the invention is not limited thereto.

As described above, the projector 100 can determine whether to turn on the function of filtering out blue light in the projector 100 according to the user's decision to prevent the user's eyes from being damaged by high-energy blue light.

However, the above is only the preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the patent application according to the present invention The scope of the invention and the equivalent equivalents and modifications of the invention are still within the scope of the invention. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.

Claims (10)

A projector comprising: an input device for receiving an input signal; a digital micro mirror for reflecting a photo signal processed by a lens group; 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 out the digital micro mirror The reflected optical signal has a portion of a specific wavelength range, and the optical signal filtered by the filter is transmitted to a projection screen through the lens. The projector of claim 1, wherein 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. The projector of claim 1, wherein the filter is a blue light filter for filtering out a portion of the blue light reflected by the digital micromirror. The projector of claim 1, wherein the lens group comprises an infrared light/ultraviolet filter, a color wheel, an integrating column, and a plurality of relay lenses. The projector of claim 4, wherein the infrared light/ultraviolet filter is disposed between the light bulb and the color wheel to filter out Ultraviolet light and infrared light from the light signals of the above bulbs. The projector of claim 5, wherein the color wheel is disposed between the infrared light/ultraviolet filter and the integral column for filtering the infrared light/ultraviolet filter. The optical signal is color separated and focused into the above integral column. The projector of claim 6, wherein the integrating column is disposed between the color wheel and the relay lens for homogenizing the color signals after color separation. The projector of claim 7, wherein the relay lens is disposed between the integrating column and the digital micromirror for amplifying the optical signal that is homogenized in the integrating column The optical signal is transmitted to the digital micromirror. A projector operating method, wherein the projector comprises an input device, a digital micro mirror, a filter, a lens, a motor, a plurality of lens groups and a controller, comprising: receiving one of the input devices Inputting a signal; controlling the motor to move the filter between the digital micromirror and the lens according to the received input signal; and filtering one of the reflected by the digital micromirror through the filter The optical signal has a portion of a specific wavelength range, wherein the optical signal is processed by the lens group and transmitted to the digital micro mirror; and the optical signal filtered by the filter is transmitted to a projection screen through the lens. The operating method of the projector according to claim 9 of the patent application, The filter is a blue light filter for filtering out the blue portion of the optical signal reflected by the digital micro mirror, and the lens group includes an infrared light/ultraviolet filter, a color wheel, and an integral. The column and the plurality of relay lenses, the operation method of the projector further comprises: filtering the ultraviolet light and the infrared light from the light signal of a light bulb through the infrared light/ultraviolet light filter; and transmitting the infrared light through the color wheel The optical signal filtered by the light/ultraviolet filter is color-separated and focused into the integration column; the optical signal after the color separation is homogenized through the integration column; and the integration column is homogenized through the relay lens The optical signal is amplified to be the optical signal, and the optical signal is transmitted to the digital micro mirror.