CN202796008U - Display color brightness adjusting device and display device - Google Patents
Display color brightness adjusting device and display device Download PDFInfo
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- CN202796008U CN202796008U CN 201220407464 CN201220407464U CN202796008U CN 202796008 U CN202796008 U CN 202796008U CN 201220407464 CN201220407464 CN 201220407464 CN 201220407464 U CN201220407464 U CN 201220407464U CN 202796008 U CN202796008 U CN 202796008U
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Abstract
The utility model discloses a display color brightness adjusting device and a display device. A photoelectric sensor converts optical signals received from the external environment into electric signals and further sends the obtained electric signals to an analog-digital converter. The analog-to-digital converter converts the received electric signals into digital signals and sends the digital signals to a Gamma voltage generation unit. The Gamma voltage generation unit selects Gamma data corresponding to the received digital signals from a Gamma data set stored in advance. The Gamma voltage generation unit further adjusts the Gamma resistance value inside itself according to the selected Gamma data, generates a corresponding Gamma voltage, and sends the generated Gamma voltage to a drive integrated circuit. The drive integrated circuit then adjusts the brightness of display colors according to a video signal and a Gamma curve corresponding to the received Gamma voltage. The display color brightness adjusting device provided by the utility model can dynamically adjust the Gamma curve according to the changes in the brightness of the surroundings to effectively dynamically adjust the brightness of display colors.
Description
Technical field
The utility model relates to lcd technology, relates in particular to a kind of regulating device and display device of display color brightness.
Background technology
Along with the maturation of liquid crystal flat-panel display technique with popularize, people are more and more higher to the requirement of liquid crystal display quality.How to make the visual effect of human eye reach best, become the technical research field that more and more liquid crystal panel producers make earnest efforts.
At first, learn about the visual characteristic of human eye.Fig. 1 is that human eye is to the change curve synoptic diagram of light.As shown in Figure 1, horizontal ordinate is incident ray brightness, and ordinate is human-eye visual characteristic.As can be seen from Figure 1, when some brightness was being arranged, it is enough bright that human eye is just felt from complete black in incident ray brightness; Then, continue to strengthen along with incident ray brightness, arrived very strong the time, it is very blunt that the reaction of human eye but becomes, and incident ray brightness is further strengthened again, and human eye can not feel bright much yet.This response curve that human eye changes light can be called gamma (Gamma) curve of human eye.Strictly, the Gamma curve of human eye is not single exponential depth relation, but is become by a plurality of power value arrays under the different brightness, can express with formula (1):
Y＝X^a (1)
Wherein, Y represents people's ophthalmic reaction, and X represents ambient brightness, and a represents exponential depth.
Here, the value of a satisfies following relation:
Just because of human eye visual characteristic so, display device just need to be regulated the brightness of display color in procedure for displaying, thereby can make human eye see best display effect.Expect the brightness of color and the linear response relationship of human eye, just need display device to adopt the brightness of Gamma curve adjustment color shown in Figure 2.Because the power exponent a of the Gamma curve of human eye is a value that constantly changes, so the power exponent b of the Gamma curve that display device adopts also should be the value that constantly changes, can adopt formula (2) to express:
Z＝W^b (2)
Wherein, Z represents transmitance, i.e. the brightness of color, and W represents GTG, b represents exponential depth.
Here, the value of b satisfies following relation:
Because the visual characteristic of human eye and the brightness of surrounding environment have nonlinear relation.Therefore, at present, mostly comparatively traditional solution of improving the liquid crystal display quality is to carry out Gamma and proofreaies and correct in driving (Driver) integrated circuit (IC, Integrated Circuit).Particularly, at one group of resistance of the upper welding of printed circuit board (PCB) (PCB, Printed Circuit Board), regulate Gamma voltage, thereby can carry out brightness regulation to the display color by vision signal institute output image among the Driver IC.Although this method can satisfy the vision requirement of human eye to a certain extent, the method can only provide the Gamma curve under a kind of single brightness.That is: no matter whether the brightness of surrounding environment changes, liquid crystal display can only adopt fixing Gamma curve to carry out brightness regulation, so, when the brightness of surrounding environment changes, just human eye requirement to the Gamma curve under different brightness can't be satisfied, thereby the visual effect of human eye can be had influence on.
In addition, also having a solution is the mode that adopts Gamma correction buffer circuit able to programme (Pgamma) chip.The Pgamma chip is the new technology that generates along with the development of memory technology.Be with the difference of traditional solution: adopt the mode of PGamma chip to utilize the on off state of Gamma resistance in several groups of Gamma Data Control of the memory stores chip, regulate the size of Gamma resistance, thereby regulate the size of Gamma voltage, and then reach the purpose of brightness adjusting.Although this method can be utilized several groups of Gamma data of chip internal storage, the size of regulating Gamma voltage, thereby the adjusting of realization brightness,, the method still can not according to the brightness of actual surrounding environment, be carried out the adjusting of brightness.In other words, when the brightness of surrounding environment changed, the method still can't satisfy human eye requirement to the Gamma curve under different brightness, still can have influence on the visual effect of human eye.
The utility model content
In view of this, fundamental purpose of the present utility model is to provide a kind of regulating device and display device of display color brightness, can be according to the variation of surrounding environment brightness, and the effectively brightness of dynamic adjustments display color.
For achieving the above object, the technical solution of the utility model is achieved in that
A kind of regulating device of display color brightness, this regulating device comprises: photoelectric sensor, analog to digital converter, gamma electric voltage generation unit and drive integrated circult; Wherein,
Described photoelectric sensor converts electric signal to for the light signal of external environment that will receive, and the electric signal after will changing sends to the photoelectric sensor of described analog to digital converter;
Described analog to digital converter converts digital signal to for the electric signal that the described photoelectric sensor that will receive sends, and the digital signal after will changing sends to the analog to digital converter of gamma voltage generation unit;
Gamma data corresponding to digital signal that described gamma voltage generation unit sends for the described analog to digital converter of selecting to receive in pre-stored gamma data group, and according to the gamma data of selecting, regulate the gamma resistance value of self inside, produce corresponding gamma voltage, the gamma voltage that produces is sent to the gamma voltage generation unit of described drive integrated circult;
Described drive integrated circult is gamma curve corresponding to described gamma voltage according to vision signal and the transmission of described gamma voltage generation unit, regulates the drive integrated circult of the brightness of display color.
Wherein, described gamma voltage generation unit further comprises: time schedule controller and Gamma correction buffer circuit chip able to programme; Wherein,
Described time schedule controller is the gamma data corresponding to digital signal of the described analog to digital converter transmission that selection is received in pre-stored gamma data group, and the gamma data of selecting is sent to the time schedule controller of Gamma correction buffer circuit chip able to programme;
Described Gamma correction buffer circuit chip able to programme is the gamma resistance value according to gamma data adjusting self inside of the selection of described time schedule controller transmission, produce corresponding gamma voltage, and the gamma voltage that produces is sent to the Gamma correction buffer circuit chip able to programme of described drive integrated circult.
Wherein, this regulating device further comprises: the storage unit of storage gamma data group.
Wherein, described storage unit is integrated in the described time schedule controller or is integrated in the described Gamma correction buffer circuit chip able to programme.
Wherein, described gamma voltage generation unit further comprises: data selector and Gamma correction buffer circuit chip able to programme, described data selector are integrated in the described Gamma correction buffer circuit chip able to programme;
Gamma data corresponding to digital signal that described data selector sends for the described analog to digital converter of selecting to receive in pre-stored gamma data group, and according to the gamma data of selecting, regulate the gamma resistance value of described Gamma correction buffer circuit chip able to programme, produce the data selector of corresponding gamma voltage;
Described Gamma correction buffer circuit chip able to programme sends to the Gamma correction buffer circuit chip able to programme of described drive integrated circult for the gamma voltage that will produce.
Wherein, this regulating device further comprises: the storage unit of storage gamma data group.
Wherein, described storage unit is integrated in the described Gamma correction buffer circuit chip able to programme.
A kind of display device comprises the regulating device such as above-mentioned each described display color brightness.
Regulating device and the display device of the display color brightness that the utility model provides comprise: photoelectric sensor, analog to digital converter, Gamma voltage generation unit and Drive IC; Wherein, photoelectric sensor converts the light signal of the external environment that receives to electric signal, and the electric signal after will changing sends to analog to digital converter; Analog to digital converter convert the electrical signal to digital signal, and the digital signal after will changing sends to Gamma voltage generation unit after receiving the electric signal of photoelectric sensor transmission; After Gamma voltage generation unit is received the digital signal of analog to digital converter transmission, in pre-stored Gamma data group, select Gamma data corresponding to described digital signal, according to the Gamma data of selecting, regulate the Gamma resistance value of self inside, produce corresponding Gamma voltage, and the Gamma voltage that produces is sent to Drive IC; After Drive IC receives the Gamma voltage of Gamma voltage generation unit transmission, according to vision signal and Gamma curve corresponding to described Gamma voltage, regulate the brightness of display color, so, can be according to the variation of surrounding environment brightness, dynamic adjustments Gamma curve, thereby the effectively dynamic brightness of regulating display color.
Description of drawings
Fig. 1 is that human eye is to the change curve synoptic diagram of light;
Fig. 2 is that display device is regulated the Gamma curve synoptic diagram that color adopts;
Fig. 3 is the regulating device structural representation of the utility model display color brightness;
Fig. 4 is the regulating device structural representation of embodiment display color brightness.
Description of reference numerals:
The 31--photoelectric sensor; The 32--analog to digital converter; 33--Gamma voltage generation unit; 34--Drive IC; 331--time schedule controller (TCON, Timer CONtrol register); The 332--PGamma chip.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described in more detail.
The regulating device of the utility model display color brightness, as shown in Figure 3, this regulating device comprises: photoelectric sensor 31, analog to digital converter 32, Gamma voltage generation unit 33 and Drive IC 34; Wherein,
Analog to digital converter 32 is connected with Gamma voltage generation unit 33, after being used for receiving the electric signal of photoelectric sensor 31 transmissions, convert the electrical signal to digital signal, and the digital signal after will changing sends to Gamma voltage generation unit 33;
Gamma voltage generation unit 33, be connected with Drive IC 34, after being used for receiving the digital signal of analog to digital converter 32 transmissions, in pre-stored Gamma data group, select Gamma data corresponding to described digital signal, according to the Gamma data of selecting, regulate the Gamma resistance value of self inside, produce corresponding Gamma voltage, and the Gamma voltage that produces is sent to Drive IC 34;
Drive IC 34, be connected with Gamma voltage generation unit 33, after being used for receiving the Gamma voltage of Gamma voltage generation unit 33 transmissions, according to vision signal and Gamma curve corresponding to described Gamma voltage, regulate the brightness by the display color of vision signal institute output image among the Driver IC.
Wherein, described photoelectric sensor 31 can convert any one photoelectric sensor of electric signal to for the existing light signal of realizing.
Described external environment refers to the residing surrounding environment of regulating device of the display color brightness that the utility model provides.
Described analog to digital converter 32 can become any one analog to digital converter of digital signal for the existing analog signal conversion that can realize.Here, described electric signal is simulating signal.
Described Gamma voltage generation unit 33 can further include: TCON and PGamma chip; Wherein,
TCON is connected with the PGamma chip, after being used for receiving the digital signal of analog to digital converter 32 transmissions, selects Gamma data corresponding to described digital signal in pre-stored Gamma data group, and the Gamma data of selecting are sent to the PGamma chip;
The PGamma chip, be connected with TCON, after the Gamma data of receiving the selection that TCON sends, according to the Gamma resistance value of the Gamma data adjusting of selecting self inside, produce corresponding Gamma voltage, and the Gamma voltage that produces is sent to Drive IC 34.
Perhaps, described Gamma voltage generation unit 33 may further include: data selector and PGamma chip, described data selector are integrated in the described PGamma chip;
Data selector, after being used for receiving the digital signal of analog to digital converter 32 transmissions, in pre-stored Gamma data group, select Gamma data corresponding to described digital signal, and according to the Gamma data of selecting, regulate the Gamma resistance value of described PGamma chip, produce corresponding Gamma voltage;
The PGamma chip, the Gamma voltage that is used for producing sends to Drive IC 34.
This regulating device can further include: storage unit is used for storage Gamma data group.Wherein, when practical application, described storage unit can be integrated in the described Gamma voltage generation unit 33, more specifically, can be integrated among the TCON of Gamma voltage generation unit 33, in this case, after described TCON received the digital signal of analog to digital converter 32 transmissions, the Gamma data of directly calling selection from described storage unit got final product.Perhaps, described storage unit can also be integrated in the PGamma chip of described Gamma voltage generation unit 33, so, can save the occupied area of PCB chips on the one hand, makes things convenient for layout, also can save production cost on the other hand.Perhaps, can set up separately described storage unit.Here, preferably, described storage unit can be able to be integrated in the described PGamma chip.
Below in conjunction with embodiment the utility model is described in further detail again.
The regulating device of present embodiment display color brightness as shown in Figure 4, comprising: photoelectric sensor 31, analog to digital converter 32, Gamma voltage generation unit 33 and Drive IC 34; Described Gamma voltage generation unit 33 can further include: TCON 331 and PGamma chip 332; Wherein,
When practical application, this regulating device can further include: storage unit is used for storage Gamma data group.Here, Gamma resistance code in the Gamma data representation PGamma chip 332 in the described Gamma data group, in other words, described PGamma chip 332 can be according to each the Gamma data in the described Gamma data group, can control the on off state of self each Gamma resistance.Wherein, need to set in advance the Gamma data in the described Gamma data group, when arranging, need to be according to the visual characteristic of human eye, under different brightness, formulate the Gamma curve of different power exponents, with the Gamma voltage corresponding to Gamma Curve transform one-tenth of different power exponents, according to different Gamma voltage, find corresponding Gamma resistance code, with the corresponding Gamma resistance code of different Gamma voltage as each the Gamma data in the described Gamma data group.
Wherein, when practical application, described storage unit can be integrated among the described TCON 331, and in this case, after described TCON 331 received the digital signal of analog to digital converter 32 transmissions, the Gamma data of directly calling selection from described storage unit got final product.Perhaps, described storage unit can be integrated in the described PGamma chip 332, so, can save the occupied area of PCB chips on the one hand, makes things convenient for layout, can save production cost on the other hand.Perhaps, can set up separately described storage unit.Here, preferably, described storage unit can be able to be integrated in the described PGamma chip 332.
Because the visual characteristic of human eye, that is: when incident ray was from entirely deceiving to some brightness is being arranged, it is enough bright that human eye is just felt.Afterwards, along with the continuation of light luminance is strengthened, arrived very strong the time, it is very blunt that the reaction of human eye but becomes, afterwards along with light luminance again a step improve, human eye can not feel bright much yet.So, in the actual requirement, want the low local Gamma power exponent value of specific luminance to want large in the value of the high local Gamma power exponent of brightness.Give an example, office at 300LX, when human eye reaches optimized visual effect, need adopting power exponent a is that 2.2 Gamma curve is regulated visual effect, and in the office of 500LX, when human eye reached optimized visual effect, needs employing power exponent a was 2.3 Gamma curve adjustment visual effect.Here, described LX represents the brightness unit.So in the display device product of reality, just need to assess the brightness of the environment for use of display device product, then according to the visual characteristic of human eye, under different brightness, formulate the Gamma curve of different power exponents.Then the resistance value that the Gamma curve of these different power exponents is corresponding is put into the PGamma chip, like this, when the brightness of the photoelectric sensor perception surrounding environment of display device product changes, the TCON of display device product receives brightness value information from photoelectric sensor by analog to digital converter, TCON is according to the brightness value of the measured surrounding environment of photoelectric sensor, choose corresponding Gamma data, and send to the PGamma chip, the PGamma chip is according to the Gamma data of choosing, the on off state of the resistance of self inside is set, to regulate the Gamma resistance value of self inside, produce corresponding Gamma voltage, thereby produce corresponding Gamma curve.Like this, just can realize coming according to the brightness of surrounding environment the purpose of dynamic adjustments Gamma curve, and then realize the variation according to surrounding environment brightness, the brightness of dynamic adjustments display color.
In addition, when practical application, can not adopt TCON to select Gamma data corresponding to described digital signal, but adopt the mode of data selector.In other words, described Gamma voltage generation unit 33 can further include: data selector and PGamma chip, described data selector is integrated in the described PGamma chip, in this case, photoelectric sensor converts the light signal of the external environment that receives to electric signal, and the electric signal after will changing sends to analog to digital converter; After analog to digital converter is received the electric signal of sensor transmission, convert the electrical signal to digital signal, and the digital signal after will changing sends to described data selector, described data selector is selected Gamma data corresponding to described digital signal in pre-stored Gamma data group, and according to the Gamma data of selecting, regulate the Gamma resistance value of described PGamma chip, produce corresponding Gamma voltage, described PGamma chip sends to Drive IC with the Gamma voltage that produces; After Drive IC receives the Gamma voltage of described PGamma chip transmission, according to vision signal and Gamma curve corresponding to described Gamma voltage, regulate the brightness of display color.
Based on the regulating device of above-mentioned display color brightness, the utility model also provides a kind of display device, comprising: the regulating device of above-mentioned display color brightness.
The above is preferred embodiment of the present utility model only, is not be used to limiting protection domain of the present utility model.
Claims (8)
1. the regulating device of a display color brightness is characterized in that, this regulating device comprises: photoelectric sensor, analog to digital converter, gamma voltage generation unit and drive integrated circult; Wherein,
Described photoelectric sensor converts electric signal to for the light signal of external environment that will receive, and the electric signal after will changing sends to the photoelectric sensor of described analog to digital converter;
Described analog to digital converter converts digital signal to for the electric signal that the described photoelectric sensor that will receive sends, and the digital signal after will changing sends to the analog to digital converter of gamma voltage generation unit;
Gamma data corresponding to digital signal that described gamma voltage generation unit sends for the described analog to digital converter of selecting to receive in pre-stored gamma data group, and according to the gamma data of selecting, regulate the gamma resistance value of self inside, produce corresponding gamma voltage, the gamma voltage that produces is sent to the gamma voltage generation unit of described drive integrated circult;
Described drive integrated circult is gamma curve corresponding to described gamma voltage according to vision signal and the transmission of described gamma voltage generation unit, regulates the drive integrated circult of the brightness of display color.
2. regulating device according to claim 1 is characterized in that, described gamma voltage generation unit further comprises: time schedule controller and Gamma correction buffer circuit chip able to programme; Wherein,
Described time schedule controller is the gamma data corresponding to digital signal of the described analog to digital converter transmission that selection is received in pre-stored gamma data group, and the gamma data of selecting is sent to the time schedule controller of Gamma correction buffer circuit chip able to programme;
Described Gamma correction buffer circuit chip able to programme is the gamma resistance value according to gamma data adjusting self inside of the selection of described time schedule controller transmission, produce corresponding gamma voltage, and the gamma voltage that produces is sent to the Gamma correction buffer circuit chip able to programme of described drive integrated circult.
3. regulating device according to claim 2 is characterized in that, this regulating device further comprises: the storage unit of storage gamma data group.
4. regulating device according to claim 3 is characterized in that, described storage unit is integrated in the described time schedule controller or is integrated in the described Gamma correction buffer circuit chip able to programme.
5. regulating device according to claim 1, it is characterized in that, described gamma voltage generation unit further comprises: data selector and Gamma correction buffer circuit chip able to programme, described data selector are integrated in the described Gamma correction buffer circuit chip able to programme;
Gamma data corresponding to digital signal that described data selector sends for the described analog to digital converter of selecting to receive in pre-stored gamma data group, and according to the gamma data of selecting, regulate the gamma resistance value of described Gamma correction buffer circuit chip able to programme, produce the data selector of corresponding gamma voltage;
Described Gamma correction buffer circuit chip able to programme sends to the Gamma correction buffer circuit chip able to programme of described drive integrated circult for the gamma voltage that will produce.
6. regulating device according to claim 5 is characterized in that, this regulating device further comprises: the storage unit of storage gamma data group.
7. regulating device according to claim 6 is characterized in that, described storage unit is integrated in the described Gamma correction buffer circuit chip able to programme.
8. a display device is characterized in that, comprises the regulating device such as each described display color brightness of claim 1 to 7.
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| CN 201220407464 CN202796008U (en) | 2012-08-16 | 2012-08-16 | Display color brightness adjusting device and display device |
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Cited By (9)
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| CN104599646A (en) * | 2013-10-31 | 2015-05-06 | 佳能株式会社 | Display apparatus and control method thereof |
| CN104700775A (en) * | 2015-03-13 | 2015-06-10 | 西安诺瓦电子科技有限公司 | Image display method and image display brightness regulating device |
| WO2015096253A1 (en) * | 2013-12-25 | 2015-07-02 | 深圳市华星光电技术有限公司 | Liquid crystal display panel drive system architecture and liquid crystal display using same |
| CN105070252A (en) * | 2015-08-13 | 2015-11-18 | 小米科技有限责任公司 | Display brightness reducing method and device |
| CN105592254A (en) * | 2014-10-21 | 2016-05-18 | 宏碁股份有限公司 | Image display method and electronic device |
| CN105741775A (en) * | 2016-05-05 | 2016-07-06 | 京东方科技集团股份有限公司 | Method and device for adjusting Gamma curve |
| CN106686363A (en) * | 2016-11-01 | 2017-05-17 | 青岛海信电器股份有限公司 | Signal mixed processing method and device in display terminal |
| CN109961753A (en) * | 2019-05-06 | 2019-07-02 | 深圳市华星光电半导体显示技术有限公司 | Picture regulating device |
| CN112327494A (en) * | 2020-10-29 | 2021-02-05 | 中国航空工业集团公司洛阳电光设备研究所 | Automatic brightness adjusting method for airborne head-up display |
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- 2012-08-16 CN CN 201220407464 patent/CN202796008U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104599646A (en) * | 2013-10-31 | 2015-05-06 | 佳能株式会社 | Display apparatus and control method thereof |
| WO2015096253A1 (en) * | 2013-12-25 | 2015-07-02 | 深圳市华星光电技术有限公司 | Liquid crystal display panel drive system architecture and liquid crystal display using same |
| CN105592254A (en) * | 2014-10-21 | 2016-05-18 | 宏碁股份有限公司 | Image display method and electronic device |
| CN105592254B (en) * | 2014-10-21 | 2019-01-08 | 宏碁股份有限公司 | Image display method and electronic device |
| CN104700775A (en) * | 2015-03-13 | 2015-06-10 | 西安诺瓦电子科技有限公司 | Image display method and image display brightness regulating device |
| CN105070252A (en) * | 2015-08-13 | 2015-11-18 | 小米科技有限责任公司 | Display brightness reducing method and device |
| US9858885B2 (en) | 2015-08-13 | 2018-01-02 | Xiaomi Inc. | Method and device for reducing display brightness |
| US10460655B2 (en) | 2016-05-05 | 2019-10-29 | Boe Technology Group Co., Ltd. | Gamma tuning method and gamma tuning device |
| CN105741775A (en) * | 2016-05-05 | 2016-07-06 | 京东方科技集团股份有限公司 | Method and device for adjusting Gamma curve |
| CN106686363A (en) * | 2016-11-01 | 2017-05-17 | 青岛海信电器股份有限公司 | Signal mixed processing method and device in display terminal |
| CN109961753A (en) * | 2019-05-06 | 2019-07-02 | 深圳市华星光电半导体显示技术有限公司 | Picture regulating device |
| WO2020224054A1 (en) * | 2019-05-06 | 2020-11-12 | 深圳市华星光电半导体显示技术有限公司 | Picture adjustment apparatus |
| CN112327494A (en) * | 2020-10-29 | 2021-02-05 | 中国航空工业集团公司洛阳电光设备研究所 | Automatic brightness adjusting method for airborne head-up display |
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Owner name: JINGDONGFANG SCIENCE AND TECHNOLOGY GROUP CO., LTD Free format text: FORMER OWNER: BEIJING BOE PHOTOELECTRICITY SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20150630 Owner name: BEIJING BOE PHOTOELECTRICITY SCIENCE + TECHNOLOGY Effective date: 20150630 |
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Effective date of registration: 20150630 Address after: 100015 Jiuxianqiao Road, Beijing, No. 10, No. Patentee after: BOE TECHNOLOGY GROUP Co.,Ltd. Patentee after: BEIJING BOE OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Address before: 100176 Beijing city in Western Daxing District economic and Technological Development Zone, Road No. 8 Patentee before: BEIJING BOE OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |
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