KR20150096144A - White balance device for video screen - Google Patents

White balance device for video screen Download PDF

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Publication number
KR20150096144A
KR20150096144A KR1020140017216A KR20140017216A KR20150096144A KR 20150096144 A KR20150096144 A KR 20150096144A KR 1020140017216 A KR1020140017216 A KR 1020140017216A KR 20140017216 A KR20140017216 A KR 20140017216A KR 20150096144 A KR20150096144 A KR 20150096144A
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KR
South Korea
Prior art keywords
color temperature
video
white balance
computer
camera
Prior art date
Application number
KR1020140017216A
Other languages
Korean (ko)
Inventor
푸치 우
Original Assignee
푸치 우
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 푸치 우 filed Critical 푸치 우
Priority to KR1020140017216A priority Critical patent/KR20150096144A/en
Publication of KR20150096144A publication Critical patent/KR20150096144A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Image Signal Generators (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

A white balance device includes a color temperature sensing device and a white or grey light transmitting sheet to be applied to a consumer electronic device. The white or grey light transmitting sheet converts the incident light to achromatic light to enable the color temperature sensing device to induce a spot color temperature signal, enable the CPU of the consumer electronic device to obtain the precise white balance (or color temperature) through a white balance calculation process, and adjust the color temperature of the display device in the consumer electronic device.

Description

WHITE BALANCE DEVICE FOR VIDEO SCREEN BACKGROUND OF THE INVENTION [0001]

The present invention relates to an image pickup technique, and more particularly, to an image pick-up technique, and more particularly, to an image pick-up technique which induces a spot color temperature signal and transmits the signal to a television, a computer monitor, a computer main unit, a notebook computer, a tablet computer, , A video monitor, a network camera, a video projector, or a cellular phone so that the CPU obtains an accurate white balance (color temperature) value and automatically adjusts the color temperature of the video screen to be displayed so as to be close to the natural color of the shooting scene. A gray light transmission sheet and a color temperature sensing element and is installed in a television, a computer monitor, a computer main unit, a notebook computer, a tablet computer, a camera, a video camera, a video recorder, a video monitor, a network camera, It relates to a balancing device.

The video screen may receive the color temperature and then automatically adjust the color temperature value or the color temperature value may be manually adjusted to match the color temperature of the ambient light. The human eye can automatically adjust the color temperature. If the video screen can not automatically adjust the color temperature value, the human eye will not be able to view the displayed video in the correct color, causing a visual change in the eye, causing the color display to feel unnatural. It is desirable to have a video screen that can automatically adjust the color temperature or display the spot white balance color temperature value in a display window for manual adjustment. If the average person lacks this knowledge and the color settings of the video appliances are incorrect, the video appliances may be misunderstood as poor quality.

The video screen performs the display function, for example, based on a predetermined color temperature at which the default value of 6500K is set. However, in the field around the video screen, the ambient color temperature value changes with time and the environment in which it is located. When a color temperature value of a light source in the field is applied to a video screen, it affects the color temperature value of the video screen or raises or lowers the surface color temperature value of the display screen, causing a change in the intraocular pressure of the color sensitive person's eye, I feel it is inaccurate. For ordinary people, adjusting the color of the video screen is very difficult. Also, the room color temperature can be changed frequently due to mixing of other indoor and outdoor lighting sources, complicating the color temperature control of the video screen, and making adjustment almost impossible. When watching a video screen in the dark, such as in a movie theater, the video screen has no ambient light interference and people can see the correct color representation.

Currently, regular video screens, including commercial cameras and video cameras' display screens, do not provide an automatic white balance design. The color temperature of outdoor sunlight changes with time during daytime. Advanced color temperature control with 100K color temperature control unit In the camera test, the camera's display screen is preset for the camera's display screen to approximate the color of the room object after manual white balance adjustment, and then manually adjusts the color temperature . However, in testing, manual adjustment can not have an accurate color temperature. This test shows that it is difficult or even impossible for an average person to accurately adjust the color temperature of a video screen, not to mention the effect of continuous changes in ambient color temperature on color change and viewing.

The present invention has been achieved under the circumstances in the field of vision. The present invention has a video screen such as a television, a computer monitor, a tablet computer, a camera, a video camera, a video projector or a cellular phone equipped with a white balance device having a white or gray light transmitting sheet and a color temperature sensing element. When the external light passes through the white or gray light transmitting sheet, the white or gray light transmitting sheet converts the incident light into achromatic light, and the color temperature sensing element derives the spot color temperature signal to transmit the signal to the television, Monitor, tablet computer, camera, video camera, video projector or mobile phone's CPU. Thus, the CPU can obtain accurate white balance values and adjust the spot color temperature of the video screen.

Accordingly, it is a primary object of the present invention to provide a color display device having a white or gray light transmitting sheet and a color temperature sensing element and capable of being used in a wide range of applications including televisions, computer monitors, computer main units, notebook computers, tablet computers, cameras, video cameras, video recorders, And a white balance device installed in a video projector or a cellular phone. The white or gray light transmissive sheet converts incident light to achromatic light to cause the color temperature sensing element to induce spot color temperature and transmit the signal to a television, a computer monitor, a computer main unit, a notebook computer, a tablet computer, a camera, A video camera, a video recorder, a video monitor, a network camera, a video projector, or a cellular phone, and the CPU calculates a white balance for the detected color temperature value to obtain an accurate white balance (color temperature) value and further adjust the spot color temperature of the video screen Process so that the human eye will see a picture or video displayed with the correct color close to the natural color of the shot scene.

It is still another object of the present invention to provide a white balance device having a white or gray light transmitting sheet and a color temperature sensing element. When the white light passes through the white or gray light transmitting sheet, the white or gray light transmitting sheet converts the incident light into achromatic light to induce a spot color temperature signal and obtain the correct white balance (color temperature) (Color temperature) value is provided to the television, a computer, a video projector, or a mobile phone's CPU so that the spot color temperature value for manual adjustment can be displayed in a window of the display screen, Display on a display window of a monitor, computer main unit, notebook computer, tablet computer, camera, video camera, video recorder, video monitor, network camera, video projector or mobile phone.

Are included in the scope of the present invention.

Other features and advantages of the present invention will be fully understood with reference to the following description in conjunction with the accompanying drawings, in which like reference numerals designate like structural elements.
1 is a schematic view showing a white balance device installed in a television according to the present invention.
Figure 2 is a schematic lateral side view of the embodiment shown in Figure 1;
2A shows a white balance device installed in a remote controller, a mini network computer, or a TV stick according to the present invention.
3 is a schematic diagram showing a white balance device installed in a computer monitor according to the present invention.
Figure 4 is a schematic lateral side view of the embodiment shown in Figure 3;
5 is a schematic diagram showing a white balance device installed in a computer main unit according to the present invention.
Figure 6 is a schematic lateral side view of the embodiment shown in Figure 5;
6A is a schematic view showing a white balance device installed in a computer mouse and a keyboard of a computer system according to the present invention, respectively.
Figure 7 illustrates a removable white balance device that can be detachably connected to a computer main unit in accordance with the present invention.
8 is a schematic view showing a white balance device installed in a notebook computer according to the present invention.
Figure 9 is a schematic lateral side view of the embodiment shown in Figure 8;
9A is a schematic view showing a white balance device installed in a tablet computer according to the present invention.
10 is a schematic view showing a white balance device installed in front of a cellular phone according to the present invention.
11 is a schematic view showing a white balance device installed on the back side of a cellular phone according to the present invention.
12 shows a television, a computer monitor, a computer main unit, and a notebook computer, respectively, each of which is equipped with a wireless receiver for receiving a white balance value from a cellular phone according to the present invention.
13 shows a wireless transceiver for wirelessly transmitting white balance values obtained on television, computer monitor, computer main unit, and notebook computer, and a battery-mounted separate white balance device.
14 is a schematic diagram showing a white balance device installed in a video projector according to the present invention.
15 is a schematic lateral side view of the embodiment shown in Fig.

1 to 6 and 8 to 11, a television 1, a computer monitor 3, a computer main unit 4, and a display unit 5 including a white or gray light transmitting sheet 2 and a color temperature detecting element 21, And a display white balance device according to the present invention used in a notebook computer 5, a tablet computer 8, a camera, a video camera, a video recorder, a video monitor, a network camera or a cellular phone 6 are shown. When the external light passes through the white or gray light transmitting sheet 2, it is converted into uniform achromatic light reaching the color temperature detecting element 21, so that the color temperature detecting element 21 induces a spot color temperature signal, 1, a computer monitor 3, a computer main unit 4 and a CPU (not shown) of a notebook computer 5, a tablet computer 8, a camera, a video camera, a video recorder, 31, 41, 51, 61, 81 to obtain an accurate white balance (color temperature) value and to provide an accurate white balance (color temperature) The white balance calculation process is executed so as to automatically adjust the spot color temperature of the video screen so that the human eye can see the picture or video displayed with the correct color.

Alternatively, an accurate white balance (color temperature) value obtained from the color temperature values retrieved through the white balance calculation process may be supplied to the television 1, the computer monitor 3, the computer main unit 4, and the notebook computer 5, 8) can be displayed in a window of a display screen of a camera, a video camera, a video recorder, a video monitor, a network camera or a cellular phone 6, so that the color temperature of the display device can be manually set . Thus, the human eye can see pictures or videos displayed in correct color.

The white or gray light transmitting sheet 2 and the color temperature sensing element 21 of the white balance device of the present invention may be connected to the remote controller 43 of the television 1 or any other audio / video entertainment equipment, 44), or a TV stick. Accordingly, the white balance device converts the incident light into uniform achromatic light, derives the spot color temperature signal, and then transmits the spot color temperature signal to the television 1, the computer monitor 3, the computer main unit 4, and the notebook computer 5, 61, 81 of the mobile phone 6, the tablet computer 8, the mini network computer 44, the camera, the video camera, the video recorder, the video monitor, The CPU 11, 31, 41, 51, 61, 81 performs the white balance calculation process for the searched color temperature value, obtains an accurate white balance (color temperature) value, The spot color temperature of the screen can be automatically adjusted, so that the color temperature of the video screen can be automatically adjusted so as to approach the natural color of the shooting scene (see FIG.

Further, the white or gray light transmitting sheet 2 and the color temperature sensing element 21 of the white balance device of the present invention may be installed in the keyboard 45 or the computer mouse 46. Accordingly, the white balance device converts the incident light into uniform achromatic light to induce the spot color temperature signal, and then obtains the spot color temperature signal in the computer main unit 4, the television 1, the computer monitor 3 or the notebook computer 5 The computer main unit 4, the television 1, the computer monitor 3 or the notebook computer 5 can execute the white balance calculation process for the searched color temperature values and can perform accurate white balance The color temperature of the video screen of the computer main unit 4, the television 1, the computer monitor 3 or the notebook computer 5 can be obtained so as to approach the natural color of the shooting scene Can be automatically adjusted (see Fig. 6A).

Referring to Fig. 7, the white balance device of the present invention can be manufactured in a detachable form that can be detachably connected to the computer main unit 4. [ As shown, the removable white balance device according to this embodiment comprises a housing 22, a white or gray light transmitting sheet 2 mounted on the front surface of the housing 22, A color temperature sensor 21 disposed behind the gray light transmitting sheet 2 and positioned on the opposite rear surface of the housing and electrically connected to the color temperature sensor 21 and connected to the computer main unit 4 And a water electrical connector 221 detachably connectable to a mating female electrical connector 42 of a portable computer (e.g., a notebook computer, a tablet computer, a camera, a video camera, an image projector or a cellular phone). Accordingly, the white balance device can convert the incident light into uniform achromatic light, induce a spot color temperature signal, and then transmit an accurate white balance value to be obtained to the CPU 41 of the computer main unit 4, The white balance calculation process for the detected color temperature value is executed and the color temperature of the video screen is automatically adjusted after obtaining the accurate white balance (color temperature) value.

12, radio receivers 12, 42 and 52 for receiving a white balance value from a cellular phone 6 are mounted on a television 1, a computer main unit 4 and a notebook computer 5, respectively . The cellular phone 6 has a white balance device including a white or gray light transmitting sheet 2 and a color temperature detecting element 21 installed therein. Assuming the function of the white balance device, the white or gray light transmitting sheet 2 and the color temperature detecting element 21, the white balance device measures the color temperature value from the surroundings and then measures the color temperature measured by the embedded white balance device The mobile phone 6 is controlled so as to wirelessly transmit the values to the radio receivers 12, 42 and 52 of the television 1, the computer main unit 4 and the notebook computer 5. [ The television 1, the computer main unit 4 and the notebook computer 5 receive the color temperature value transmitted by the cellular phone 6 using the wireless network card or the wireless connector, obtain the accurate white balance (color temperature) The color temperature value is also transmitted to the CPU 11, 41, 51 in the television 1, the computer main unit 4 and the notebook computer 5 for the white balance calculation process so as to automatically adjust the spot color temperature of the computer 1 The spot color temperature of the video screen of the television 1, the computer main unit 4 and the notebook computer 5 can be automatically adjusted. The television 1, the computer main unit 4 and the notebook computer 5 may be equipped with a wireless network card for receiving wireless signals or may be attached with a wireless connector. The wireless receiver 12, 42, 52 may also be installed in the computer monitor 3, the tablet computer, the camera or the video camera to receive the white balance (color temperature) from the cellular phone 6 in a wireless manner. In addition, a flush-mount image pickup device of a video camera, a mobile phone, a video recorder, a video monitor, a network camera or a tablet computer can be configured for a white balance calculation process to obtain ambient color temperature values, To set the working color temperature for the workpiece.

Alternatively, an internal CCD or CMOS image sensor of a video camera, smartphone, video recorder, monitor, network camera or tablet computer receives the incident light and derives the spot color temperature and then converts the spot color temperature to a video camera , A smartphone, a video recorder, a monitor, a network camera or a tablet computer, so that the calculated accurate white balance (color temperature) value can be wirelessly transmitted to the television 1, the tablet computer, the mobile phone 6, To be transmitted to the wireless receiver 12, 42, 52 of the unit 4 or the notebook computer 5 and to achieve automatic adjustment of the color temperature of the display device to meet the spot color temperature. Alternatively, the measured spot color temperature value may be displayed on the television 1, the cellular phone 6, the tablet computer, the notebook computer 5 or a personal computer for manual adjustment.

Referring to FIG. 13, a separate white balance device according to the present invention is manufactured in a separate form, and the measured white balance (color temperature) value is supplied to the device through the television 1, the computer main unit 4, A wireless transceiver 23 and a battery 24 that can transmit data to the base station 5 can be mounted. According to this embodiment, the separate white balance device comprises a housing 22, a white or gray light transmitting sheet 2 mounted on the front surface of the housing 22, A color temperature sensing element 21 spaced behind the transparent sheet 2 and a wireless transceiver 23 and a battery 24 mounted on the housing 22 and electrically connected to the color temperature sensing element 21. Through the white or gray light transmissive sheet 2 and the color temperature sensing element 21, a separate white balance device measures the color temperature of the incident light, and then transmits the measured color temperature value via the wireless transceiver 23 to the television To the wireless receiver 12, 42, 52 of the computer unit 1, the computer unit 4 or the notebook 5 so that the color temperature value is transmitted to the television 1 by the wireless receiver 12, , The computer unit 4 or the internal CPU 11 of the notebook computer 5 and automatically adjusts the spot color temperature of the video screen so that the television 1, The spot color temperature of the video screen of the notebook 5 can be automatically adjusted to be close to the natural color of the shooting scene.

14 and 15, a white balance device constituted by a white or gray light transmitting sheet 2 and a color temperature sensing element 21 according to the present invention can be used in the video projector 7. [ When the external light passes through the white or gray light transmitting sheet 2, it is converted into uniform achromatic color light that touches the color temperature sensing element 21, and the color temperature sensing element 21 induces a spot color temperature signal, (Color temperature) of the video screen by automatically adjusting the spot color temperature of the video screen and providing the accurate white balance (color temperature) value to the CPU 71 of the video screen 7 to automatically adjust the spot color temperature of the video screen, Have a photo or video displayed in color.

In conclusion, the present invention provides a white balance device having a wireless function for automatically obtaining an accurate balance (color temperature) value and transmitting the obtained white balance (color temperature) value to a home appliance having a display device, Can be automatically or manually adjusted.

Although specific embodiments of the invention have been described in detail for purposes of illustration, various changes and modifications may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not limited except as by the appended claims.

1: Television
2: light transmitting sheet
3: Computer Monitor
4: Computer main unit
5: Notebook computer
6: Mobile phone
7: Video projector
8: Tablet computer
11, 31, 41, 51, 61,
12, 42, 52: radio receiver
15: notebook computer
21: Color temperature sensing element
22: Housing
23: Wireless Transceiver
43: remote controller
44: Mini Network Computer
45: Keyboard
46: Computer mouse

Claims (11)

A white or gray light transmission sheet and a color temperature sensing element and is installed in a television, a computer monitor, a computer main unit, a notebook computer, a tablet computer, a camera, a video camera, a video recorder, a video monitor, a network camera, a video projector, , The incident light passes through the white or gray light transmissive sheet and is then converted into achromatic color light that touches the color temperature sensing element by the white or gray light transmissive sheet, the color temperature sensing element induces a spot color temperature signal, To a CPU of a computer monitor, a computer main unit, a notebook computer, a tablet computer, a camera, a video camera, a video recorder, a video monitor, a network camera, a video projector or a cellular phone, and the CPU obtains an accurate white balance (color temperature) The above- The spot color temperature of a video screen of a television, a computer monitor, a computer main unit, a notebook computer, a tablet computer, a camera, a video camera, a video recorder, a video monitor, a network camera, a video projector, or a mobile phone, on the assumption of an accurate white balance (color temperature) Wherein the white balance calculating step performs a white balance calculation process on the searched color temperature value to further adjust the white balance. The method according to claim 1,
The CPU displays a sensitive spot white balance value obtained through a white balance calculation process on the received spot color temperature value on a video screen of a television, a computer main unit, a camera, a video camera, a video projector and a cellular phone, Of the spot color temperature is manually adjusted to match the spot color temperature, allowing the human eye to see the picture or video displayed with the correct color. The method according to claim 1,
A white balance device includes a housing, a white or gray light transmitting sheet mounted on the front face of the housing, a color temperature sensing element mounted on the housing and spaced behind the housing of the white or gray light transmitting sheet, And a male electrical connector electrically connected to the color temperature sensing element and connectable to a female electrical connector of a television, a computer monitor, a computer main unit, a notebook computer, a tablet computer, a camera, a video camera, a video projector or a cellular phone, Passing through a white or gray light transmitting sheet and then being converted into achromatic color light that touches the color temperature sensing element by the white or gray light transmitting sheet, wherein the color temperature sensing element derives a spot color temperature signal and transmits the signal to the television, Monitor, com (CPU) to provide a CPU of a computer, a main unit, a notebook computer, a tablet computer, a camera, a video camera, a video recorder, a video monitor, a network camera, a video projector or a cellular phone, and the CPU obtains an accurate white balance (color temperature) Adjust the color temperature of the video screen of a television, a computer monitor, a computer main unit, a notebook computer, a tablet computer, a camera, a video camera, a video recorder, a video monitor, a network camera, a video projector or a mobile phone based on the white balance (color temperature) A white balance device for performing a white balance calculation process on the detected color temperature values. The method according to claim 1,
The television, the computer monitor, the computer main unit, the notebook computer, the tablet computer, the camera, the video camera, the video recorder, the video monitor, the network camera, the video projector or the cellular phone receives the white balance value from the white balance device in the mobile phone, And a wireless device for transmitting the received white balance value to a television, a computer main unit, or a CPU of the notebook computer for balance calculation, the spot color temperature of the television, the computer monitor, or the notebook computer is automatically To obtain the correct white balance (color temperature) value. 5. The method of claim 4,
A television camera, a video camera, a video recorder, a video monitor, a network camera, a video projector, or a cellular phone may be a white balance device having a wireless connector with or connected to a wireless network card, . 5. The method of claim 4,
The internal CCD or CMOS image sensor of the smartphone receives the incident light and derives the spot color temperature and then provides the spot color temperature to the CPU of the smartphone for the white balance calculation process, (Color misleading) values wirelessly computed to a television, a computer main unit or a wireless receiver of a tablet computer for automatic adjustment of the color temperature of the display device of the tablet computer. The method of claim 3,
A separate white balance device is mounted on the housing and is electrically connected to the color temperature sensing element, and the measured white balance value is transmitted wirelessly to a television, a computer monitor, a computer main unit, a notebook computer, a tablet computer, a camera, A wireless transceiver capable of transmitting to the receiver and a battery so that the white balance value can be used for calculation of the color temperature of the video screen and also for automatic adjustment to the spot color temperature, , Or to the CPU of the video camera. The method according to claim 1,
The display device can receive an external white balance color temperature value via a cable or wireless interface and then automatically adjust the spot color temperature of the video device or display the received white balance color temperature value on the display screen for further manual adjustment White balance device. The method according to claim 1,
The white balance device may be installed in a television or audio / video entertainment device, a mini network computer, or a remotor controller of a TV stick so that the white balance device converts the incident light into uniform achromatic light and then derives the spot color temperature signal A computer, a computer main unit, a notebook computer, and a CPU of a mini network computer via a cable or a wireless transmission interface, and the CPU calculates the white balance for the detected color temperature value And adjust the spot color temperature of the display screen automatically by obtaining more accurate white balance (color temperature) values. The method according to claim 1,
Calculate the color temperature of the display screen to match the spot color temperature and also measure the ambient color temperature for automatic adjustment and then transmit the measured color temperature value to the CPU of the computer main unit, television, computer monitor or notebook computer via cable or wireless interface A white balance device in which a white balance device can be mounted on a keyboard or a computer mouse. The method according to claim 1,
A flush-mount image pickup device of a video camera, a mobile phone, a video recorder, a video monitor, a network camera, or a tablet computer is configured to process a white balance calculation to obtain a surrounding color temperature value such that the flush operating system or application software A white balance device to be set.
KR1020140017216A 2014-02-14 2014-02-14 White balance device for video screen KR20150096144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140017216A KR20150096144A (en) 2014-02-14 2014-02-14 White balance device for video screen

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Application Number Priority Date Filing Date Title
KR1020140017216A KR20150096144A (en) 2014-02-14 2014-02-14 White balance device for video screen

Publications (1)

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KR20150096144A true KR20150096144A (en) 2015-08-24

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