KR20120029246A - Apparatus and method of controlling brightness of lamp in a projector automatically - Google Patents

Apparatus and method of controlling brightness of lamp in a projector automatically Download PDF

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Publication number
KR20120029246A
KR20120029246A KR1020100091220A KR20100091220A KR20120029246A KR 20120029246 A KR20120029246 A KR 20120029246A KR 1020100091220 A KR1020100091220 A KR 1020100091220A KR 20100091220 A KR20100091220 A KR 20100091220A KR 20120029246 A KR20120029246 A KR 20120029246A
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KR
South Korea
Prior art keywords
distance
lamp
brightness
amount
projector
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KR1020100091220A
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Korean (ko)
Inventor
구제길
김용남
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용인송담대학 산학협력단
유니스트림 주식회사
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Priority to KR1020100091220A priority Critical patent/KR20120029246A/en
Publication of KR20120029246A publication Critical patent/KR20120029246A/en

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/142—Adjusting of projection optics
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2053—Intensity control of illuminating light
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3155—Modulator illumination systems for controlling the light source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Projection Apparatus (AREA)

Abstract

PURPOSE: An automatic adjustment device for brightness of a projector lamp and a control method are provided to reduce an unnecessary driving current because lamp brightness is adjusted by considering a distance between a screen and the projector and an illuminance of installation environment. CONSTITUTION: An automatic adjustment device for brightness of a projector(100) lamp comprises a wheel sensing unit(108), a illuminance sensing unit(101), a control unit(102) and a lamp driving unit. The wheel sensing unit detects a distance between the projector and a screen by using resistance value varied by interlocking with a focal point of a lens focus adjusting wheel(107). The illuminance sensing unit detects the brightness of the surrounding environment in the place where the projector is installed. The control unit receives information related to the distance and brightness from the illuminance sensing unit, thereby deciding an optimal quantity of irradiated beams of the lamp based on the information related to the distance and brightness. When power is applied, the lamp driving unit controls and supplies a quantity of lamp driving current to a light engine unit(106) according to the optimal quantity of irradiated beams of the lamp.

Description

Apparatus and method of controlling brightness of lamp in a projector automatically}

The present invention relates to an apparatus and method for adjusting lamp brightness of a projector, and more particularly, to an apparatus and method for automatically adjusting lamp brightness of a projector that can reduce power consumption of a small projector and provide optimal screen brightness.

A 'projector' is a type of projection device that is an optical device that shows a large number of people by simultaneously projecting pictures, pictures, characters, etc. on slides and transparent paper onto the screen through a lens. In particular, the 'beam projector' is connected to a computer such as a desktop or a laptop, and the monitor output screen is projected on the screen to show a lot of applications such as watching movies or presentations.

Recently, due to the development of technology, a compact projector (aka PICO Projector), which is easy to carry, has been developed and released, and a projector built in a mobile phone is also being developed.

On the other hand, since the projector emits strong light through the lens to cause an image to form on a screen located a certain distance apart, the power consumption of the light emitting lamp is considerably high. Therefore, when using a portable such as a small projector is difficult to use a commercial power source for a long time using only the built-in battery is impossible.

In other words, the conventional beam projector emits a constant beam regardless of the surrounding environment and the distance to the screen. Therefore, the screen screen is dark and difficult to see in a bright place, while in a dark place close to the screen emits excessive light is wasted energy. For this reason, the life of the lamp is shortened, a lot of current is unnecessarily consumed, and the external heat generation of the product is severe, causing a problem of low efficiency.

Accordingly, there is a demand for a method for optimizing the brightness of light emitted from a small projector and outputting power without reducing inconvenience for users to view an image.

An object of the present invention is to provide an apparatus and method for automatically adjusting lamp brightness of a projector that can provide an optimal screen brightness in consideration of the distance between the projector and the screen and the brightness of the environment around the projector.

In addition, an object of the present invention is to determine the optimal screen brightness in consideration of the distance between the projector and the screen and the brightness of the environment around the projector, the distance of the distance by the lens focus adjustment wheel to increase the reliability of the distance information measured from the distance sensor The present invention provides an apparatus and method for automatically adjusting lamp brightness of a projector for determining accuracy.

In addition, an object of the present invention is to determine the optimal screen brightness in consideration of the distance between the projector and the screen and the brightness of the environment around the projector, by accumulating and comparing the measured values to the optimum screen brightness without being affected by temporary environmental changes It is to provide an apparatus and method for automatically adjusting the lamp brightness of the projector that can provide.

In order to achieve the above object, the device according to the present invention comprises a wheel detecting unit for determining the distance between the projector and the screen with a resistance value that is variable in conjunction with the focus of the lens focusing wheel; An illuminance sensor for detecting the brightness of the surrounding environment of the place where the projector is installed; A controller configured to receive distance information and brightness information from the wheel detector and the illuminance detector, respectively, and determine an optimal amount of lamp irradiation beam from the received distance information and brightness information; And a lamp driver configured to supply an amount of lamp driving current to the light engine unit according to the optimum amount of lamp irradiation beam determined by the controller when power is applied.

In this case, the control unit is characterized in that for determining the optimal lamp irradiation beam amount is increased in proportion to the received distance information and brightness information, respectively.

On the other hand, the apparatus further comprises a database for storing the data determined by the experiment through the repetitive irradiation the optimal amount of the lamp irradiation beam amount for the distance information and brightness information, the control unit from the received distance information and brightness information from the The optimum lamp irradiation beam amount is determined according to the data stored in the database.

In addition, the apparatus further comprises a distance sensor unit for measuring the distance to the screen by a distance sensor for measuring the distance using the wavelength, the control unit further receives the distance information measured from the distance sensor unit, When the distance value measured by the distance sensor unit and the distance value determined by the wheel sensing unit are included in the set error range, the optimum lamp irradiation beam amount is determined by giving priority to the distance value measured by the distance sensor unit. Characterized in that it is used as information for.

In addition, the control unit periodically determines the optimal lamp irradiation beam amount and stores the determined value, compares the optimal lamp irradiation beam amount accumulated in the last N times, the current than the number of the optimal lamp irradiation beam amount currently applied When the number of optimal lamp irradiation beam amounts having a different value from is large, the lamp irradiation beam amount may be adjusted to the optimum lamp irradiation beam amount having another value.

In order to achieve the above object, the method according to the present invention comprises the steps of determining the distance between the projector and the screen with a resistance value that is variable in conjunction with the focus of the lens focusing wheel; Detecting brightness of a surrounding environment of a place where a projector is installed; Determining an optimal lamp irradiation beam amount from the distance and brightness information; And adjusting the amount of lamps irradiated from the lamp by adjusting the amount of lamp driving current according to the determined optimal amount of lamp irradiation beams.

According to the present invention, by adjusting the brightness of the lamp to be irradiated in consideration of the illuminance of the installation environment of the projector and the distance to the screen, it is possible to reduce the unnecessary driving current of the lamp, and further extend the life of the lamp. .

In addition, when applied to a portable projector, it is possible to reduce the battery consumption by more than 10% compared to the existing products can improve the efficiency.

In addition, according to the present invention, in determining the optimum screen brightness, by determining the distance by the resistance value that is variable in conjunction with the focus of the lens focusing wheel, the advantage of increasing the reliability of the distance information measured from the distance sensor There is this.

In addition, according to the present invention, even if a temporary environmental change occurs in the projector, there is an advantage that can provide the optimum screen brightness irrespective of such environmental change.

1 is a block diagram showing the structure of a projector according to the present invention;
2 is a flowchart illustrating a procedure for automatically adjusting lamp brightness of a projector according to the present invention.
3 is a flowchart illustrating a procedure of automatically adjusting lamp brightness of a projector according to an exemplary embodiment of the present invention.
4 is a flowchart illustrating a procedure of automatically updating lamp brightness of a projector according to an embodiment of the present invention.

A typical projector is driven by an independent device. When the projector is placed in various environments depending on the application, the image is hard to see on the screen if the surrounding environment is brighter than the lamp light. In addition, in a dark environment, the lamp emits light more than necessary, resulting in lamp life and energy loss.

The present invention proposes a method for automatically reducing the brightness of the projector lamp according to the surrounding environment, saving current consumption, which is an important issue in a portable pico projector, and extending the life of the lamp. In this case, the distance from the screen and the brightness around the projector may be taken into consideration as an environmental element to determine the brightness of the lamp.

In the present invention, the distance between the projector and the screen is determined by a variable resistance in conjunction with the focus of the lens focus adjustment wheel in the wheel detection unit for measuring the distance to the screen, and the wheel detection when the measured value by the distance sensor is applied The value determined by the negative person will increase the reliability of the measured value. In addition, the projector ambient brightness may be measured using an illuminance sensor, and the optimal amount of lamp irradiation beam is determined from the measured distance information and the ambient brightness.

In this case, the method of determining the optimal lamp irradiation beam amount from the distance information and the brightness information may be determined by calculating the correlation of each variable value or may be determined by the data table created by the experimental results.

DETAILED DESCRIPTION Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a block diagram showing the structure of a projector according to the present invention. Referring to FIG. 1, the projector 100 according to the present invention includes an illumination intensity sensing unit 101, a control unit 102, a power supply unit 103, a lamp driving unit 104, a distance sensing unit 105, and an optical engine unit 106. ), The lens focus adjusting wheel unit 107, the wheel detecting unit 108, and the like.

First, when power is applied from the power supply unit 103 to the lamp driving unit 104, the lamp driving unit 104 supplies the lamp driving current to the light engine unit 106 to drive the lamp, so that the lamp beams the front wall of the screen. (110). At this time, when the image signal input from the control unit 102 is input to the light engine unit 106, the light engine unit 106 is irradiated to the screen with a beam amount obtained by expanding the input image signal through the optical unit. The beam quantity irradiated in this way makes the image look bright or dark depending on the illumination of the place where the project is installed and the distance to the screen.

On the other hand, the wheel detector 108 detects the distance with the screen by varying the resistance value in conjunction with the focus of the lens focus adjustment wheel 107 to detect the distance to the screen. In addition, the illuminance detecting unit 101 detects the illuminance of the surroundings in which the projector is installed by the illuminance sensor, and the distance detecting unit 105 measures the distance from the screen wall 110 by radio waves such as ultrasonic waves or infrared rays. .

The controller 102 calculates an optimized brightness based on the illuminance and distance detected by the illuminance detector 101, the distance detector 105, or the wheel detector 108, and adjusts the beam amount according to the calculated brightness. You decide.

Therefore, when it is determined that the beam amount determined according to the sensed illuminance and the distance to the screen is appropriate for the current illuminance and the distance to the screen, the driving current of the lamp driver 104 is maintained in a current state so that the light engine unit ( Through 106, the beam is irradiated. If the determined beam amount does not match the current beam amount, it is determined whether the current beam amount is brighter than the detected beam amount. At this time, if the beam amount currently irradiated is greater than the determined beam amount (that is, the brightness is bright), the controller 102 determines that the beam amount is large because the illuminance of the current surrounding is low or the distance to the screen is close, and the lamp driving unit ( The driving current of the 104 is controlled to a beam amount smaller than the present, that is, the determined beam amount to irradiate the beam through the light engine unit 106.

On the other hand, when the beam amount currently irradiated is smaller than the determined beam amount (that is, when it is not bright), the controller 102 determines that the beam amount is small due to the high illumination around the current or the distance from the screen, and the lamp driver 104 ) Is transmitted with a beam amount larger than the present.

Hereinafter, the function of each structure part is demonstrated in detail.

First, the power supply unit 103 is composed of a rectifying unit or a battery for rectifying the input AC power to a predetermined constant voltage. The lamp driver 104 supplies a driving current of the lamp with a constant voltage input from the power supply 103, and the lamp driver 104 includes a variable that varies the driving current by a control signal of the controller 102. .

The light engine unit 106 receives the driving current from the lamp driver 104 and optically enlarges the image signal to irradiate the enlarged beam. The light engine unit 106 is composed of an optical unit, an image device, a lamp and the like.

The illuminance detecting unit 101, the distance detecting unit 105, and the wheel detecting unit 108 transmit the measured illuminance information or the distance information to the control unit 102, respectively. At this time, the control unit 102 determines the optimal amount of lamp irradiation beam according to the present invention from the transmitted illumination information and distance information. As such, the control unit 102 compares the beam amount determined according to the illuminance of the surrounding environment or the distance to the screen wall 110 with the beam amount currently being irradiated, and increases the beam amount if the current beam amount is large, and increases the beam amount if the beam amount is small.

The illuminance detecting unit 101 is configured as an illuminance sensor to detect the brightness of the surrounding environment of the place where it is installed, and may be configured to detect the amount of light with the Cds element.

The distance detecting unit 105 is configured as a system capable of measuring a distance by using an ultrasonic or infrared sensor. The distance detector 105 measures the distance from the screen wall 110 and compares the distance value detected by the wheel detector 108 to the present invention. A detailed description thereof will be given later.

The lens focus adjusting wheel unit 107 adjusts the focus of the beam irradiated to the screen from the light engine unit 106 by rotating the wheel of the lens. For example, the wheel can rotate about two wheels, and the focus is changed according to the rotation angle of the wheel. On the other hand, when there is an auto focusing function, the focus according to the distance is automatically adjusted by rotating the wheel by a small motor.

As such, when the focus is adjusted by the displacement of the lens focusing wheel 107, the wheel sensing unit 108 detects the distance using a variable resistance value that is linked with the focusing displacement according to the long and short focus. As such, the distance information detected by the wheel detector 108 is transmitted to the controller 102.

The controller 102 controls and processes the input image signal as a digital signal, and according to the present invention, the controller 102 is optimized according to the illuminance detected by the illuminance detector 101 and the wheel detector 108 and the distance between the screen and the screen. The amount of beams irradiated from the lamps of the light engine unit 106 is adjusted by determining the amount of lamp irradiation beams of the lamp driver 104.

In this case, the controller 102 may determine the optimal lamp irradiation beam amount by calculating the correlation between the values of the variable values or by using the data table created by the experimental results. When calculating and determining the optimum lamp irradiation beam amount, the calculation method is preferably set such that the optimum lamp irradiation beam amount is proportional to the illuminance value and the distance value, respectively. That is, the brighter the measured ambient brightness is, the larger the lamp irradiation beam amount should be, and the farther the distance from the screen, the larger the lamp irradiation beam amount should be set.

On the other hand, when the optimal amount of lamp irradiation beam is determined by an experimental data table, the brightness is set in a table divided into several stages (for example, seven stages) and stored in the memory according to the illuminance and the distance to the screen. Afterwards, the optimum amount of lamp irradiation beam is determined with reference to this. That is, the data value received by the illuminance detector 101, the distance detector 105, the wheel detector 108, and the like is determined by comparing the measured data value similar to the external environment in the microprocessor of the controller 102. The amount of light of the lamp inside the light engine unit 106 is adjusted by converting the optimal beam amount into pulse information and controlling the current of the lamp driver 104 according to the converted pulse information.

Hereinafter, a procedure of automatically adjusting lamp brightness according to an exemplary embodiment of the present invention will be described with reference to FIGS. 2 to 4.

2 is a flowchart illustrating a procedure of automatically adjusting lamp brightness of a projector according to the present invention. Referring to FIG. 2, first, a distance from a screen is determined by using a resistance value that is linked with a lens focusing wheel (S201). In addition, the illuminance sensor detects the illuminance around the projector (S202).

After calculating the optimum screen brightness control value of the projector according to the present invention from the measured distance value and illuminance value (S203), the screen brightness of the projector is controlled (S204) by the calculated control value.

On the other hand, according to an embodiment of the present invention as described above it is also possible to measure and apply the distance by the distance sensor of the distance sensor. However, since the distance sensor is a distance measurement by the ultrasonic or infrared sensor, accurate distance measurement with the screen may be difficult due to the propagation or reflection of radio waves, and may cause inaccurate results. Therefore, according to an embodiment of the present invention, by applying the distance measurement value measured by the wheel detector 108 together, it is possible to increase the accuracy more. This method according to an embodiment of the present invention will be described with reference to FIG.

3 is a flowchart illustrating a procedure of automatically adjusting lamp brightness of a projector according to an exemplary embodiment of the present invention. Referring to FIG. 3, first, the distance between the projector and the screen is measured by a distance sensor (S301), and the distance from the screen is determined by a resistance value that is variable in conjunction with the lens focus adjusting wheel (S302). In addition, the ambient light is sensed by the illumination sensor (S303).

In the meantime, since the distance value measured by the distance sensor may be inaccurate according to an embodiment of the present invention, the distance value determined by the lens focusing wheel is verified. That is, the measured value by the distance sensor and the measured value by the lens focusing wheel are compared (S304), and if the difference is within a preset error range, the reliability of the value measured by the distance sensor is recognized and optimized. Apply to screen brightness calculation (i.e., calculation of optimal lamp irradiation beam quantity).

On the other hand, when the difference between the measured value by the distance sensor and the measured value by the lens focusing wheel is out of a predetermined error range, the value measured by the distance sensor is not reliable, so the value by the lens focusing wheel is changed. Applies to the calculation of optimal screen brightness.

The optimum screen brightness control value of the projector is calculated from the distance value and illuminance value thus determined (S308), and the screen brightness of the projector is controlled (S309) by the calculated control value.

On the other hand, even if the optimized screen brightness is calculated and applied according to the present invention as described above, if the peripheral illumination changes or the distance to the screen is changed by moving the projector, it is necessary to readjust the optimized screen brightness. However, when the illuminance value or the distance value changes temporarily or momentarily, it is desirable not to reflect this.

4 is a flowchart illustrating a procedure of automatically updating lamp brightness of a projector according to an exemplary embodiment of the present invention. Referring to FIG. 4, as described above, screen brightness control (S401) of the projector by distance and illuminance measurement is performed, and then the screen brightness is adjusted by periodically measuring distance and illuminance.

Accordingly, when the timer is driven (S402) and the measurement period arrives (S403), the distance and illuminance are re-measured in accordance with the above-described method (S404), and then the optimum screen brightness control value is calculated using the re-measured value ( S405).

In this case, when a change in the measured illuminance and distance occurs, it should be reflected in determining the optimal screen brightness, but it is preferable not to reflect this in the case of a temporary change. For example, the illuminance around the projector may be temporarily brightened or darkened by external factors, and the main body of the projector may be shaken for a while to change the distance measurement value. In such a case, it is desirable to keep the original optimum value as it is. Therefore, the screen brightness is adjusted only when the changed value is maintained by comparing the accumulated measured value according to the exemplary embodiment of the present invention.

That is, the optimal screen brightness control value calculated periodically is stored in the memory (S406), and the brightness control value stored for the last N times is compared (S407). As a result of the comparison, when the number of the same brightness control value as before is greater than the number of other brightness control values than before, the current brightness level is maintained as it is (S409). On the other hand, if the number of brightness control values different from the existing one is greater than the same brightness control value as a result of the comparison, the brightness is adjusted to the changed control value (S410).

In another method, when the changed brightness control value in the last N times of brightness control values appears more than a predetermined number of times (or lasts for a predetermined time or more), it is preferable to apply the optimum brightness level as the changed brightness control value.

For example, if the existing optimum brightness level is set to 5 and is currently being applied, but the optimum brightness level is changed to 4 according to the periodically measured result due to the darkening of the ambient illumination, the accumulated brightness level value of 4 When the number of times is greater than 5 or the level value of 4 is maintained for a predetermined time, it is preferable to change the optimum brightness level to 4 and apply it.

On the other hand, in the embodiment of the present invention has been described with respect to specific embodiments, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

100: projector 101: illuminance detection unit
102 control unit 103 power supply unit
104 lamp driving unit 105 distance detection unit
106: light engine part 107: lens focusing wheel part
108: wheel detection unit 110: screen wall

Claims (10)

A wheel detection unit determining a distance between the projector and the screen with a resistance value that is variable in conjunction with the focus of the lens focus adjustment wheel;
An illuminance sensor for detecting the brightness of the surrounding environment of the place where the projector is installed;
A controller configured to receive distance information and brightness information from the wheel detector and the illuminance detector, respectively, and determine an optimal amount of lamp irradiation beam from the received distance information and brightness information; And
And a lamp driver for controlling and supplying an amount of lamp driving current to the light engine unit according to the optimal lamp irradiation beam amount determined by the controller when power is applied.
The method of claim 1, wherein the control unit,
And the optimum lamp irradiation beam amount is determined to increase in proportion to the received distance information and brightness information, respectively.
The method of claim 1, wherein the device,
And a database for storing data determined by an experiment through an iterative irradiation of an optimal amount of lamp irradiation beams for the distance information and brightness information.
And the control unit determines the optimum lamp irradiation beam amount according to the data stored in the database from the received distance information and brightness information.
The method of claim 1, wherein the device,
The apparatus may further include a distance sensor unit configured to measure a distance from the screen by a distance sensor measuring a distance using a wavelength.
The controller further receives distance information measured from the distance sensor unit, and when the distance value measured by the distance sensor unit and the distance value determined by the wheel sensor unit are included in a set error range, the distance sensor unit The apparatus for automatically adjusting lamp brightness of a projector, characterized in that it is used as information for determining the optimum lamp irradiation beam amount by giving priority to the distance value measured by.
The method of claim 1, wherein the control unit,
Periodically determining the optimal amount of lamp irradiation beam and storing the determined value,
By comparing the optimal amount of the lamp irradiation beam accumulated in the last N times, if the number of the optimal amount of the lamp irradiation beam having a value different from the present than the number of the optimal lamp irradiation beam amount currently applied, the optimum of the other value The lamp brightness automatic adjustment device of the projector characterized by adjusting the lamp irradiation beam amount by the lamp irradiation beam amount.
Determining a distance between the projector and the screen using a resistance value that is variable in conjunction with the focus of the lens focus adjustment wheel;
Detecting brightness of a surrounding environment of a place where a projector is installed;
Determining an optimal lamp irradiation beam amount from the distance and brightness information; And
And adjusting the amount of lamps irradiated from the lamp by adjusting the amount of lamp driving current according to the determined optimal amount of lamp irradiation beams.
The method of claim 6, wherein the optimum amount of lamp irradiation beam,
And determining the lamp brightness to increase in proportion to the distance and brightness information, respectively.
The method of claim 6, wherein the optimum amount of lamp irradiation beam,
The method for automatically adjusting lamp brightness of a projector, characterized in that the optimal lamp irradiation beam quantity for the distance and brightness information is stored in an experiment and determined according to the stored data.
7. The method of claim 6, prior to determining the optimal amount of lamp irradiation beams,
Measuring distance to the screen by a distance sensor measuring distance using a wavelength;
When the distance value measured by the distance sensor and the distance value determined as a resistance value that is variable in conjunction with the focus of the lens focusing wheel are included in the set error range, the distance value measured by the distance sensor is given priority. A method of automatically adjusting lamp brightness of a projector, which is used as information for determining an optimal lamp irradiation beam amount.
The method of claim 6, wherein after adjusting the beam amount,
Periodically determining the optimal amount of lamp irradiation beam and storing the determined value;
Comparing the optimal amount of lamp irradiation beams accumulated in the last N times; And
As a result of the comparison, when the number of optimal lamp irradiation beams having a value different from the present is greater than the number of optimal lamp irradiation beams currently applied, adjusting the lamp irradiation beam amount to the optimum lamp irradiation beam amount of the other value. Lamp brightness automatic adjustment method of the projector characterized in that it further comprises.
KR1020100091220A 2010-09-16 2010-09-16 Apparatus and method of controlling brightness of lamp in a projector automatically KR20120029246A (en)

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CN104991432A (en) * 2015-07-26 2015-10-21 北京工业大学 Method for adjusting laser display brightness
KR20150139648A (en) 2014-06-03 2015-12-14 주식회사 티오이십일콤즈 Beam projector
WO2016125966A1 (en) * 2015-02-04 2016-08-11 엘지전자 주식회사 Image projection apparatus and operation method thereof
CN106840121A (en) * 2017-03-27 2017-06-13 青岛镭创光电技术有限公司 level and control method
CN107305312A (en) * 2016-04-18 2017-10-31 扬明光学股份有限公司 Projection brightness and the automatic adjustment system and method for contrast
KR20180063546A (en) 2016-12-02 2018-06-12 (주)캐스트프로 Portable Projector Device
CN108957927A (en) * 2018-07-19 2018-12-07 苏州博学智能科技有限公司 A kind of office projection instrument
CN110858052A (en) * 2018-08-23 2020-03-03 深圳光峰科技股份有限公司 Projector brightness adjusting system and brightness adjusting method
KR20200113127A (en) 2019-03-22 2020-10-06 주식회사 케이홀로그램 Image processing system using projector
CN113267943A (en) * 2021-04-20 2021-08-17 当趣网络科技(杭州)有限公司 Method for adjusting brightness of standby indicator light, projector and readable storage medium
KR20220123808A (en) 2021-03-02 2022-09-13 조원석 Projector equipped with cancave asymmetric non-spherical emission lens to improve brightness of image beam and prevent deterioration of lcd display element
KR20220158397A (en) * 2021-05-24 2022-12-01 주식회사 이수메디 Chart projector that adjusts the brightness of LED lighting according to the illuminance of the optometry room

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150139648A (en) 2014-06-03 2015-12-14 주식회사 티오이십일콤즈 Beam projector
WO2016125966A1 (en) * 2015-02-04 2016-08-11 엘지전자 주식회사 Image projection apparatus and operation method thereof
US10310676B2 (en) 2015-02-04 2019-06-04 Lg Electronics Inc. Image projection apparatus and operation method thereof
CN104991432A (en) * 2015-07-26 2015-10-21 北京工业大学 Method for adjusting laser display brightness
CN107305312A (en) * 2016-04-18 2017-10-31 扬明光学股份有限公司 Projection brightness and the automatic adjustment system and method for contrast
CN107305312B (en) * 2016-04-18 2023-10-24 扬明光学股份有限公司 Automatic adjustment system and method for projection brightness and contrast
KR20180063546A (en) 2016-12-02 2018-06-12 (주)캐스트프로 Portable Projector Device
CN106840121B (en) * 2017-03-27 2023-07-28 青岛镭创光电技术有限公司 Line projector and control method
CN106840121A (en) * 2017-03-27 2017-06-13 青岛镭创光电技术有限公司 level and control method
CN108957927A (en) * 2018-07-19 2018-12-07 苏州博学智能科技有限公司 A kind of office projection instrument
CN110858052A (en) * 2018-08-23 2020-03-03 深圳光峰科技股份有限公司 Projector brightness adjusting system and brightness adjusting method
KR20200113127A (en) 2019-03-22 2020-10-06 주식회사 케이홀로그램 Image processing system using projector
KR20220123808A (en) 2021-03-02 2022-09-13 조원석 Projector equipped with cancave asymmetric non-spherical emission lens to improve brightness of image beam and prevent deterioration of lcd display element
CN113267943B (en) * 2021-04-20 2022-07-08 当趣网络科技(杭州)有限公司 Method for adjusting brightness of standby indicator light, projector and readable storage medium
CN113267943A (en) * 2021-04-20 2021-08-17 当趣网络科技(杭州)有限公司 Method for adjusting brightness of standby indicator light, projector and readable storage medium
KR20220158397A (en) * 2021-05-24 2022-12-01 주식회사 이수메디 Chart projector that adjusts the brightness of LED lighting according to the illuminance of the optometry room

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