Patent EP0238036A2 successfully refreshed from Google Patents.
EP0238036A2
Expired / Lapsed
EP
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Method and apparatus for automatically establishing a color balance of a color television monitor
Assignee: Sony Corp
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Filing: 1987-03-17
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Granted: —
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Expires: 2007-03-17
Abstract
Abstract An apparatus for automatically establishing a color balance for a color television monitor (100) includes a sensor device (30) which is separably attached to the screen (9a) of the monitor (100) to detect the brightness of the ambient light. The ambient light brightness detected when no image is displayed is used to compensate reference data for establishing a color balance of the color signals independent of the ambient light.
Inventors
- 👤 Junichi Oshima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 20:13
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/73
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
160 words
Apparatus for automatically establishing a color balance of a color television monitor (100) including a color cathode ray tube (9) having a display surface (9a) at which a television image is presented, characterized in: adjustable drive means (8) for driving said color cathode ray tube (9) to produce a color image; sensor means (30) adapted for separable attachment to said display surface (9a) for sensing thereat an ambient light brightness when said drive means (8) does not drive said color cathode ray tube (9) and providing ambient light data corresponding to the sensed ambient light brightness; a source of reference data (12) indicative of a reference color balance of said color image; compensating means (11) for compensating said reference data with said ambient light data; and adjusting means (11, 21, 22) for controlling said adjustable drive means (8) in response to the compensated reference data to establish said color balance of said color image independent of said ambient light brightness.
Claim 2
Dependent Claim
160 words
Apparatus for automatically establishing a color balance of a color television monitor (100) including a color cathode ray tube (9) having a display surface (9a) at which a television image is presented, characterized in: adjustable drive means (8) for driving said color cathode ray tube (9) to produce a color image; sensor means (30) adapted for separable attachment to said display surface (9a) for sensing thereat an ambient light brightness when said drive means (8) does not drive said color cathode ray tube (9) and providing ambient light data corresponding to the sensed ambient light brightness; a source of reference data (12) indicative of a reference color balance of said color image; compensating means (11) for compensating said reference data with said ambient light data; and adjusting means (11, 21, 22) for controlling said adjustable drive means (8) in response to the compensated reference data to establish said color balance of said color image independent of said ambient light brightness.
Claim 3
Dependent Claim
48 words
Apparatus according to claim 1, characterized in that comprising means for controlling said color cathode ray tube (9) to display at said display surface (9a) a television image including a predetermined sensing area (9b), said sensor means (30) being adapted for attachment at said predetermined sensing area (9b).
Claim 4
Dependent Claim
46 words
Apparatus according to claim 1 or 2, characterized in that said sensor means (30) includes a sensor device (31) and memory means (33) for storing a plurality of sets of color temperature data which can be withdrawn from said memory means (33) as said reference data.
Claim 5
Dependent Claim
68 words
Apparatus according to claim 2 or 3, characterized in that said control means includes pulse generating means for generating a pulse when a scanning position of said color cathode ray tube (9) is coincident with a position of said sensor device (31) when said sensor means (30) is attached to said display screen (9a), said sensor means (31) sensing said ambient light brightness in response to said pulse.
Claim 6
Dependent Claim
18 words
Apparatus according to claim 3 or 4, characterized in that said memory means is non-volatile memory means (33).
Claim 7
Dependent Claim
29 words
Apparatus according to any one of claims 3 to 5, characterized in that one of said sets is a set of color temperature data at a predetermined color temperature.
Claim 8
Dependent Claim
71 words
Apparatus according to any one of claims 1 to 6, characterized in that said adjusting means includes random access memory means (13) for storing a selected one of said sets of color temperature data from the first mentioned memory means (33) and said ambient light data from said sensing means (31), and central processing unit means (11) for processing said selected set of color temperature data and said ambient light data.
Claim 9
Dependent Claim
51 words
Apparatus according to claim 7, characterized in that said compensating means (11) generates said compensated reference data by adding said ambient light data to the set of color temperature data stored in said random access memory (13), said compensated reference data being then stored in said random access memory means (13).
Claim 10
Dependent Claim
31 words
Apparatus according to claim 7 or 8, characterized in comprising means (11, 19, 43) for transferring data between said random access memory means (13) and said first mentioned memory means (33).
Claim 11
Dependent Claim
32 words
Apparatus according to any one of claims 7 to 9, characterized in that said adjusting means further includes battery means (16) for backing up said random access memory (13) during power turn-off.
Claim 12
Dependent Claim
53 words
Apparatus according to any one of claims 1 to 10, characterized in that said sensor means (30) senses a total brightness including said ambient light brightness and an image brightness when said drive means (8) drives said color cathode ray tube (9) and provides total light data corresponding to the sensed total brightness.
Claim 13
Dependent Claim
40 words
Apparatus according to any one of claims 1 to 11, characterized in that a/said central processing unit (11) compares said total light data to said compensated reference data and controls said adjustable drive means (8) in response to the comparison.
Claim 14
Dependent Claim
32 words
Apparatus according to claim 12, characterized in that said central processing unit (11) controls said adjustable drive means (8) so as to equalize said total light data and said compensated reference data.
Claim 15
Dependent Claim
57 words
Apparatus according to any one of claims 3 to 13, characterized in that a/said central processing unit (11) subtracts said ambient light data from said total light data to generate one of said sets of color temperature data and transfers the generated set of color temperature data to said memory means (33) in said sensor means (30).
Claim 16
Independent Claim
122 words
A method for automatically establishing a color balance of a color television monitor (100) including a color cathode ray tube (9) having a display surface (9a) at which a television image is presented, characterized in the steps of; sensing an ambient light brightness at said display surface (9a) when said color cathode ray tube (9) is not driven; generating ambient light data corresponding to the sensed ambient light brightness; providing reference data indicative of a reference color balance of said color image; compensating said reference data with said ambient light data; and adjustably driving said color cathode ray tube (9) in response to the compensated reference data to establish said color balance of said color image independent of said ambient light brightness.
Claim 17
Independent Claim
122 words
A method for automatically establishing a color balance of a color television monitor (100) including a color cathode ray tube (9) having a display surface (9a) at which a television image is presented, characterized in the steps of; sensing an ambient light brightness at said display surface (9a) when said color cathode ray tube (9) is not driven; generating ambient light data corresponding to the sensed ambient light brightness; providing reference data indicative of a reference color balance of said color image; compensating said reference data with said ambient light data; and adjustably driving said color cathode ray tube (9) in response to the compensated reference data to establish said color balance of said color image independent of said ambient light brightness.
Claim 18
Dependent Claim
76 words
The method according to claim 15, characterized in the steps of: sensing a total brightness at said display surface (9a) including said ambient brightness and an image brightness when said color cathode ray tube (9) is driven; providing total light data corresponding to the sensed total brightness; and comparing said total light data to said compensated reference data; wherein said step of adjustably driving said cathode ray tube (9) is performed in response to the comparison.
References Cited (Backward Citations)
No citation records indexed.
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