TWI450023B - Projector and projector setting method - Google Patents

Description

Projector and projector setting method

The present invention relates to a projector, and more particularly to a method of setting a projector.

A typical projector can only provide a mono speaker output, so the sound can only be played in mono. In addition, because the projector has only a mono design, further improvement in sound quality for stereo or surround sound is limited by the hardware architecture. Furthermore, if the projector can provide stereo or multi-channel sound, it will have a variety of different positions depending on the position of the projector, such as placing it on the table (ie, operating in an upright position) or hanging from the ceiling. (ie, operating in an inverted mode), so the sound effects of the projector also need to be correspondingly different settings. Therefore, there is a need for a projector and an automatic sound setting method to overcome the above problems.

It is an object of the present invention to automatically adjust the sound effect settings of the left and right channels in accordance with the arrangement of the projector.

The present invention provides a projector for projecting an image onto a projection screen, wherein the projection screen has a viewing surface and a back surface opposite to the viewing surface, the projector includes an image projection unit for displaying an image Projected to the projection screen, a left channel speaker for playing a left channel output audio, a right channel speaker for playing a right channel output audio, and a detecting unit for Determining that the projector operates in a positive or mirror mode according to a first operational setting value of the projector, and determining that the projector is operated in an up or down manner according to a second operational setting value of the projector And a processing unit for outputting one of the right channel input audio received by the projector as the left channel output when the projector is operated in an upright and inverted manner or the projector is operated in a mirrored and upright manner Audio, and the left channel input audio received by the projector is used as the right channel output audio, and when the projector operates in a mirrored and inverted manner or the projector operates in a positive and upright manner, The left channel input audio is used as the left channel to output audio, and the right channel input audio is used as the right channel output audio, wherein the projector operates in a positive image manner, the image projection unit projects the image to The viewing surface of the projection screen, and the projector operating in a mirror mode means that the image projection unit projects the image onto the back surface of the projection screen.

The invention also provides a projector setting method, which is suitable for a projector, wherein the projector is used for projecting an image onto a projection screen, the projection screen having a viewing surface and a back surface opposite to the viewing surface, the projection The setting method of the machine comprises: determining, according to the first operation setting value of the projector, that the projector is operated in a positive image or a mirror image manner, and determining that the projector is in the upright position according to a second operation setting value of the projector Or operating in an inverted mode, when the projector is operated in a positive and inverted manner or the projector is operated in a mirrored and upright manner, one of the right channel input audio received by the projector is used as a left channel to output audio. And the left channel input audio received by the projector is used as a right channel output audio, and when the projector operates in a mirrored and inverted manner or the projector operates in a positive image and in a normal manner, the left sound is Channel input audio as the left channel output audio, and the right channel input audio is used as the right channel output audio, wherein the projector Operating in a positive mode means that the projector projects the image onto the viewing surface of the projection screen, and the projector operating in a mirror mode means that the projector projects the image onto the back side of the projection screen.

The above and other objects, features, and advantages of the present invention will become more apparent and understood.

10‧‧‧Projector

12‧‧‧Users

11‧‧‧Projection screen

13‧‧‧Back

14‧‧‧Watching surface

110‧‧‧ receiving unit

120‧‧‧Detection unit

130‧‧‧Processing unit

131‧‧‧Digital Signal Processor

140‧‧‧Play unit

141‧‧‧Left channel speaker

142‧‧‧right channel speaker

143‧‧‧Image projection unit

150‧‧‧ microphone

144‧‧‧Ranging unit

V1‧‧‧ input image

S1‧‧‧Sound signal

Figures 1(a) through 1(f) show scenarios that may exist between the projector, the user, and the projection screen.

Figure 2 is a schematic view of one of the projectors provided by the present invention.

Fig. 3 is a flow chart showing a method of setting the projector of the present invention.

Figure 4 is another schematic view of the projector provided by the present invention.

Fig. 5 is another flow chart of the setting method of the projector of the present invention.

The present invention provides a projector for projecting an image onto a projection screen and adjusting the sound effect settings of the left and right channels according to the arrangement of the projector. In an embodiment of the present invention, the projector can also determine the sound field direction of the multi-channel sound effect according to the placement manner and the distance from the projection screen.

1(a) to 1(f) are diagrams for explaining possible situations between the projector 10, the user 12, and the projection screen 11. As shown, the projection screen 11 has a viewing surface 14 and a back surface 13. The viewing surface 14 is the side of the projection screen 11 facing the user 12, and the other side of the viewing surface 14 is the back surface 13. The projection screen 11 can be a curtain, a wall, a whiteboard, a blackboard, and a glass screen, but is not limited thereto. In 1(a) In the figure, the projector 10 is operated in an upright and erect manner, and the user 12 is located behind the projector 10 (i.e., the projector 10 is located between the user 12 and the projection screen 11). In the first (b) diagram, the projector 10 is operated in an upright and erect mode, and the user 12 is located between the projector and the projection screen 11. In the first (c) diagram, the projector 10 is operated in an inverted (upside down) and erect mode, and the user 12 is located behind the projector 10 (i.e., the projector 10 is located between the user 12 and the projection screen 11). In the first (d) diagram, the projector 10 is operated in an inverted and positive manner, and the user 12 is located between the projector 10 and the projection screen 11. In the first (e) diagram, the projector 10 is operated in an upright and mirror mode, and the projection screen 11 is located behind the projector 10 (i.e., the projection screen 11 is located between the user 12 and the projector 10). In the first (f) diagram, the projector 10 is operated in an inverted and mirrored manner, and the projection screen 11 is located behind the projector 10 (i.e., the projection screen 11 is located between the user 12 and the projector 10).

Figure 2 is a schematic illustration of a projector provided by the present invention. As shown, the projector 10 is used to project an image onto a projection screen (eg, the projection screen 11 in Figures 1(a) through 1(f)) and play the sound effect corresponding to the projected image. The projector 10 includes a receiving unit 110, a detecting unit 120, a processing unit 130, and a playing unit 140. The receiving unit 110 is configured to receive the input image V1 and the sound signal S1, and the received sound signal S1 further includes a left channel input audio and a right channel input audio. The input image V1 and the sound signal S1 may be provided by a computer, a CD player, a digital set-top box or a mobile phone, but not limited thereto.

The detecting unit 120 is configured to detect an operating state of the projector 10 . For example, the operational state of projector 10 may include the context shown in Figures 1(a) through 1(f). The operational state of the projector 10 is determined by the placement position of the projector 10. In general, the user may use the projector 10 to position differently. The buttons on the projector 10, the remote controller, or the software can be used to set the operating state of the projector 10, but not limited thereto. For example, when the projector 10 is set to operate in an erect mode, a first operational setpoint will be set to one. Conversely, when the projector 10 is set to operate in a mirror mode, the first operational setting will be set to zero. When the projector 10 is set to operate in the upright mode, a second operational setpoint will be set to one. Conversely, when the projector 10 is set to operate in an inverted manner, the second operational setting will be set to zero. Therefore, the projector 10 can store the first and second operation setting values representing the operation state in the memory (not shown) in the projector 10, but is not limited thereto.

The playback unit 140 includes an image projection unit 143 for projecting images onto the projection screen 11, and a left channel speaker 141 and a right channel speaker 142 for playing a left channel output audio and a right channel output audio, respectively. . The processing unit 130 can be a central processing unit or a microprocessor, but is not limited thereto. The processing unit 130 determines whether to perform image processing, inversion processing, and intermodulation of left and right channel sound effects according to the first and second operation setting values.

For example, when the processing unit 130 determines that both the first and second operation setting values are 0, it indicates that the projector 10 operates in a mirror image and in an inverted manner (as shown in FIG. 1(f). The processing unit 130 outputs the audio as the left channel input audio and the right channel input audio as the right channel output audio. The processing unit 130 also performs image processing and inversion processing on the input image, and then The image projection unit 143 is configured to project the processed image to the projection screen 11. When the processing unit 130 determines that the first operation setting value is 0 and the second operation setting value is 1, it indicates that the projector 10 is mirrored and positive. Mode operation (as shown in Figure 1(e). At this time, the processing unit 130 will input the right channel as the left channel output. Audio, and the left channel input audio as the right channel output audio. The processing unit 130 also mirrors the input image, and the image projection unit 143 uses the image projection unit 143 to project the processed image to the projection screen 11. When the processing unit 130 determines that the first operation setting value is 1 and the second operation setting value is 0, it indicates that the projector 10 is operated in a positive image and in an inverted manner (as shown in FIG. 1(c). The processing unit 130 outputs the audio as the left channel and the left channel as the right channel, and the processing unit 130 also inverts the input image and then projects the image. The unit 143 is configured to project the processed image to the projection screen 11. When the processing unit 130 determines that the first operation setting value is 1 and the second operation setting value is 1, it indicates that the projector 10 is positive and upright. Mode operation (as shown in Figure 1(a). At this time, the processing unit 130 outputs the audio as the left channel input audio and the right channel input audio as the right channel output audio. 130 will project the image to the projection screen 11 by the image projection unit 143, but does not undergo mirror processing and inversion processing.

Figure 3 is a flow chart of a method of setting up a projector. In step 201, the operational state of the projector 10 is read. For example, the processing unit 130 reads the first and second operation setting values in a storage device to determine the operating state of the projector 10. In step 202, it is determined whether the projector is set to operate in a mirror mode, and if so, step 205 is performed. If not, proceed to step 203. For example, when the first operation setting value is 0, it means that the projector 10 operates in a mirror image mode (that is, the image is projected onto the back surface 13 of the projection screen 11). On the other hand, when the first operation setting value is 1, it means that the projector 10 is operated in a positive image mode (that is, the image is projected onto the viewing surface 14 of the projection screen 11). In step 205, it is determined whether the projector is set to operate in an inverted manner, and if so, step 207 is performed. If no, proceed to step 208. For example, when the second operation setting value is 0, it means that the projector 10 operates in an inverted manner. Conversely, when the second operation setting value is 1, it indicates that the projector 10 is operating in an upright manner. In step 203, it is determined whether the projector is set to operate in an inverted manner, and if so, step 206 is performed. If no, proceed to step 204.

In step 207, projector 10 operates in a mirrored and inverted manner (as shown in Figure 1(f)). At this time, the processing unit 130 outputs the left channel input audio to the left channel speaker 141, outputs the audio as the left channel, and outputs the right channel input audio to the right channel speaker 142 as the right channel output audio. The processing unit 130 also performs image processing and inversion processing on the input image, and the image projection unit 143 is used to project the processed image onto the back surface 13 of the projection screen 11. In step 208, projector 10 operates in a mirrored and upright manner (as shown in Figure 1(e)). At this time, the processing unit 130 outputs the right channel input audio to the left channel speaker 141, outputs the audio as the left channel, and outputs the left channel input audio to the right channel speaker 142 as the right channel to output the audio. The processing unit 130 also mirrors the input image, and the image projection unit 143 is used to project the processed image onto the back surface 13 of the projection screen 11.

In step 206, projector 10 operates in a mirrored and upright manner (as shown in Figure 1(c)). At this time, the processing unit 130 outputs the right channel input audio to the left channel speaker 141, outputs the audio as the left channel, and outputs the left channel input audio to the right channel speaker 142 as the right channel to output the audio. The processing unit 130 also performs an inversion process on the input image, and the image projection unit 143 is used to project the processed image to the viewing surface 14 of the projection screen 11. In step 204, projector 10 operates in a positive and upright manner (as shown in Figure 1(a)). At this time, the processing unit 130 outputs the left channel input audio to the left channel. The sounder 141 outputs audio as a left channel, and outputs right channel input audio to the right channel speaker 142 to output audio as a right channel. The processing unit 130 projects the image onto the viewing surface 14 of the projection screen 11 by the image projection unit 143, but does not undergo the inversion processing and the mirror processing.

Figure 4 is another schematic view of the projector of the present invention. As shown in the figure, the projector 10" is similar to the projector 10 in FIG. 2, except that the microphone 150 is further included. The detecting unit 120 further includes a ranging unit 144, and the processing unit 130 further includes a digital signal processing. The device (DSP) 131. The ranging unit 144 is configured to detect the screen distance between the projector 10 and the projection screen 11. For example, the image projection unit 143 has a variable resistor (not shown), and the variable resistor The resistance value can be used to adjust the focal length of the image projection unit 143. The ranging unit 144 can detect the screen distance between the projector 10 and the projection screen 11 according to the resistance of the variable resistor. The ranging unit 144 can also be used by the projector 10. The infrared ranging circuit (not shown) detects the screen distance between the projector 10 and the projection screen 11. Further, the processing unit 130 is configured to determine whether the screen distance is greater than at least a predetermined distance, and according to the determined result And the first operation setting value and the second operation setting value of the projector 10 determine a sound field direction. The digital signal processor 131 can input the left and right channels into the audio and/or left and right according to the determined sound field direction. Channel output audio for surround sound The effect is such that the sound played by the projector 10 has a surround sound effect. The digital signal processor 131 can also perform left and right channel input audio and/or left and right channel output audio for Dolby sound processing or multi-channel. The sound effect is simulated, but is not limited thereto. The microphone 150 is used to receive the test sound played by the left channel speaker 141 and the right channel speaker 142, and the microphone 150 performs the operation of the received test sound via the digital signal processor 131. It is used to correct the surround sound processing of the digital signal processor 131.

Fig. 5 is another flow chart of the setting method of the projector. In step 501, the operational state of the projector 10 is read. At step 502, it is determined whether the projector is set to operate in a mirror mode, and if so, step 505 is performed. Otherwise, step 503 is performed. In step 505, it is determined whether the projector is set to operate in an inverted manner, and if so, step 508 is performed. Otherwise, step 509 is performed. In step 508, it is determined that the projector is operating in a mirrored and inverted manner with the projection screen intermediate the user and the projector. In step 509, it is determined that the projector is operating in a mirrored and inverted manner with the projection screen intermediate the user and the projector.

In step 503, it is determined whether the projector is set to operate in a mirror mode. If yes, proceed to step 506. Otherwise, step 504 is performed. In steps 506 and 504, the screen distance between the projector 10 and the projection screen 11 is detected. In step 510, it is determined whether the screen distance is greater than the first preset distance d1. If yes, proceed to step 513, otherwise, proceed to step 514. It is determined whether the screen distance is greater than a preset distance, and the purpose is to determine the relative position of the user and the projector 10 by the distance between the projector and the screen. For example, when the screen distance is 1 meter, it means the user may be behind the projector. When the screen distance is 10 meters, it means the user may be in front of the projector. In an embodiment, the first preset distance d1 is 2 meters. If the distance between the projector 10 and the projection screen is less than 2 meters, it can be determined that the user is located behind the projector. In step 513, it is determined that the projector is operating in a positive image and in an inverted manner, with the user in front of the projector. In step 514, it is determined that the projector is operating in a positive image and in an inverted manner, with the user behind the projector.

In step 507, it is determined whether the screen distance is greater than the second preset distance d2. If yes, proceed to step 511. Otherwise, proceed to step 514. In an embodiment, the second preset distance d2 is 1 meter, if the projector 10 and the projection screen are If the distance is less than 1 meter, it can be judged that the user 12 is located behind the projector 10. The first preset distance d1 and the second preset distance d2 may differ due to the lens optical design of different projectors. In step 511, it is determined that the projector is operating in a positive image and in an upright manner, with the user in front of the projector. In step 512, it is determined that the projector is operating in a positive and upright manner, with the user behind the projector. In other words, in this embodiment, the processing unit determines the operating state of the projector 10 based on the first operational set value, the second operational setpoint, and the screen distance (which may also be considered a third operational setpoint).

In step 515, according to the operation states of the projector 10 determined in steps 508, 509, 513, 514, 511, and 512, the left channel speaker and the right channel speaker of the projector 10 are set. The left channel of the playback outputs audio and the right channel outputs audio, and the position of the sound field that sets the surround sound. The manner of setting the left and right channel speakers of the projector 10 is as described in the embodiment of Fig. 3, and will not be described again here.

The digital signal processor 131 determines the direction of the sound field by the distance between the projection mode, the projector 10 and the projection screen 11, and surrounds the left channel input audio and the right channel input audio via the digital signal processor 131 of the processing unit 130. deal with.

For example, in step 512, it is determined that projector 10 is operating in a positive and upright manner and the screen distance is less than a predetermined distance d2 (as shown in Figure 1(a)). At this time, the processing unit 130 outputs the left channel input audio to the left channel speaker 141, outputs the audio as the left channel, and outputs the right channel input audio to the right channel speaker 142 as the right channel output audio. Furthermore, since the screen distance is less than the preset distance d2, the user is located behind the projector 10, so The digital signal processor 131 performs surround sound processing on the left channel input audio and the right channel input audio, and sets the sound field position to the rear of the projector 10. In step 511, it is determined that the projector 10 is operated in a positive image and in an upright manner, and the distance between the projector 10 and the projection screen is greater than the preset distance d2, so the user is located in front of the projector, so the digital signal processor 131 will be left. The channel input audio and the right channel input audio are subjected to surround sound processing, and the sound field position is set to the front of the projector 10. In step 514, it is determined that the projector 10 is operated in a positive image and in an inverted manner, and the screen distance is less than the preset distance d1, so that the user is located behind the projector, so the digital signal processor 131 inputs the left channel into the audio and the right sound. The channel input audio is subjected to surround sound processing, and the sound field position is set to the rear of the projector 10.

In step 513, it is determined that the projector 10 is operated in a positive image and in an inverted manner, and the screen distance is greater than the preset distance d1, so the user is located in front of the projector, so the digital signal processor 131 inputs the left channel into the audio and the right. The channel input audio is subjected to surround sound processing, and its sound field position is set to the front of the projector 10. In step 509, it is determined that the projector 10 is operated in a mirror image and in an upright manner, and the projection screen 11 is in the middle of the user 12 in the projector 10 (the user 12 is in front of the projector 10), so the digital signal processor 131 will be left. The channel input audio and the right channel input audio are subjected to surround sound processing, and the sound field position is set to the front of the projector 10. In step 508, it is determined that the projector 10 is operated in a mirror image and in an inverted manner, and the projection screen 11 is in the middle of the user 12 in the middle of the projector 10 (the user 12 is in front of the projector 10), so the digital signal processor 131 will be left. The channel input audio and the right channel input audio are subjected to surround sound processing, and the sound field position is set to the front of the projector 10. In addition, in the above steps 508, 509, 511, 512, 513, and 514, the left channel of the projector 10 outputs audio and the right channel outputs audio and left channel. The input audio and right channel input audio setting methods are the same as those in FIG. 3, and will not be described here.

In step 516, a test tone is emitted by the left channel speaker 141 and the right channel speaker 142, and a test tone is received by the microphone 150 in the projector 10 for determining whether the sound settings of the left and right channel speakers are correct, and correcting the digits. Surround sound processing of the signal processor 131.

The projector of the present invention has left and right channel speakers for playing stereo, and the settings of the speakers can be automatically configured according to different positions of the projectors. Furthermore, the projector of the present invention can be configured with a digital signal processor to automatically configure the setting of the surround sound effect, thereby providing a more convenient operating environment and a better sound effect for the user.

10‧‧‧Projector

110‧‧‧ receiving unit

120‧‧‧Detection unit

130‧‧‧Processing unit

140‧‧‧Play unit

141‧‧‧Left channel speaker

142‧‧‧right channel speaker

143‧‧‧Image projection unit

V1‧‧‧ input image

S1‧‧‧Sound signal

Claims (9)

A projector for projecting an image onto a projection screen, wherein the projection screen has a viewing surface and a back surface opposite to the viewing surface, the projector includes: an image projection unit for projecting an image to the image Projection screen; a left channel speaker for playing a left channel output audio; a right channel speaker for playing a right channel output audio; and a detection unit for first according to the projector Operating the set value, determining that the projector is operated in a positive or mirror mode, and determining that the projector is operated in an upright or inverted manner according to a second operational setting value of the projector; and a processing unit for When the projector is operated in a positive image and in an inverted manner or the projector is operated in a mirrored and upright manner, one of the right channel input audio received by the projector is used as the left channel to output audio, and the projector is used as the projector. Receiving one of the left channel input audio as the right channel output audio, and when the projector operates in a mirrored and inverted manner or the projector operates in a positive and upright manner, the left channel is input The audio is output as the left channel, and the right channel input audio is used as the right channel output audio, wherein the projector operates in the positive image manner, and the image projection unit projects the image onto the projection screen. The viewing surface, and the projector operating in a mirror mode means that the image projection unit projects the image onto the back surface of the projection screen. The projector of claim 1, wherein the detecting unit further comprises a ranging unit for measuring a screen distance between the projector and the projection screen. The projector of claim 2, wherein the processing unit is configured to determine whether the screen distance is greater than at least a predetermined distance, and based on the determined result and the first operational setting value of the projector and the The second operational setting determines a direction of the sound field. The projector of claim 3, wherein the processing unit further comprises: a digital signal processor configured to perform the left channel input audio and the right channel input audio according to the sound field direction Surround sound processing to generate the left channel output audio and the right channel output audio. The projector of claim 4, wherein the processing unit further comprises: a microphone for receiving a test sound for correcting the surround sound processing, wherein the test sound is performed by the left channel speaker and The right channel speaker is played. A projector setting method is applicable to a projector, wherein the projector is used for projecting an image onto a projection screen having a viewing surface and a back surface opposite to the viewing surface, the setting method of the projector The method comprises: determining, according to a first operation setting value of the projector, that the projector operates in a positive image or a mirror image manner; determining that the projector is in an upright or inverted manner according to a second operation setting value of the projector Operation; when the projector is operated in a positive and inverted manner or the projector is operated in a mirrored and upright manner, one of the right channel input audio received by the projector is used Outputting audio for a left channel, and outputting audio as a right channel by one of the left channel input audio received by the projector; and when the projector operates in a mirrored and inverted manner or the projector is positive and positive When the mode operation is performed, the left channel input audio is used as the left channel output audio, and the right channel input audio is used as the right channel output audio; wherein the projector operates in a positive image manner to refer to the projector. Projecting the image onto the viewing surface of the projection screen, and operating the projector in mirror mode means that the projector projects the image onto the back surface of the projection screen. The method for setting a projector according to claim 6, further comprising: measuring a distance between the projector and the projection screen to obtain a screen distance; determining whether the screen distance is greater than at least a preset distance; The result of the determination and the first operational set value of the projector and the second operational set value determine a sound field direction. The method for setting a projector according to claim 7, further comprising: performing a surround sound processing on the left channel input audio and the right channel input audio according to the sound field direction to generate the left channel Output audio and the right channel output audio. The method for setting a projector according to claim 8, further comprising: playing a test sound by the left channel speaker and the right channel speaker, and receiving the test sound by a microphone in the projector; And correcting the surround sound processing according to the test sound received by the microphone.