JPH0772825A - Pdp display device - Google Patents
Pdp display deviceInfo
- Publication number
- JPH0772825A JPH0772825A JP5219935A JP21993593A JPH0772825A JP H0772825 A JPH0772825 A JP H0772825A JP 5219935 A JP5219935 A JP 5219935A JP 21993593 A JP21993593 A JP 21993593A JP H0772825 A JPH0772825 A JP H0772825A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- pdp
- display
- drive
- brightness
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
- G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
-
- 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
- G09G3/22—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 using controlled light sources
- G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
- G09G2340/0428—Gradation resolution change
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Plasma & Fusion (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of Gas Discharge Display Tubes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、表示モードおよびディ
スプレイ周囲の明るさに応じ、表示輝度レベルと表示階
調数の適切化を計った表示をするプラズマディスプレイ
（ＰＤＰ）表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display (PDP) display device for displaying a display in which the display brightness level and the number of display gradations are optimized according to the display mode and the brightness around the display.
【０００２】[0002]
【従来の技術】図２に示すように、ＰＤＰ表示装置では
１つの方法として、アドレス・表示分離型サブフィール
ド法の技術による、例えば、（イ）図の２５６階調表示
の駆動シーケンスを用い、１フレームは輝度の相対比
が、１、２、４、８、１６、３２、６４、１２８の８個
のサブフィールドで構成され、前記８画面の輝度の組み
合わせで２５６階調の表示を行う。それぞれのサブフィ
ールドは、リフレッシュした１画面分のデータの書き込
みを行うアドレス期間と、そのサブフィールドの輝度を
決めるサステイン期間で構成される。アドレス期間で
は、最初全画面同時に各ピクセルに初期的に壁電荷が形
成され、その後サステインパルスが全画面に与えられ、
表示を行う。サブフィールドの明るさは、サステインパ
ルスの数に比例し、所定の輝度に設定される。ところ
が、上記のアドレス・表示分離型サブフィールド法の技
術による駆動シーケンスでは、図３に示すように、表示
階調数は１フレーム当たりのサブフィールド数によって
決まり、例えば、サブフィールド数が６では、１フレー
ムは輝度の相対比が、１、２、４、８、１６、３２の６
個のサブフィールドで構成され、表示階調数は６４とな
るので、表示画面輝度は、アドレス期間が一定な条件
で、１フレーム当たりのサブフィールド数に反比例する
ことになり、例えば、表示階調数を６４、１２８、２５
６と増加させると、それに応じて表示画面輝度レベルは
大、中、小と変化する。言い換えれば、表示画面輝度と
表示階調数は背反関係にある。何となれば、１フレーム
当たりのサブフィールド数をｎで表し、アドレス期間
（一定）を文字ａで表すと、サステイン期間の総和は、 サステイン期間の合計 ＝ １フレーム期間−ｎ×ａ・・・（１） （１）式から分かるように、１フレーム期間（１６．７
ｍｓ）からｎ×ａを差し引いた残りの期間となる。表示
のためのサステインパルスの周期が一定であるので、表
示画面輝度は、同サステイン期間の総和に比例し、サブ
フィールド数に反比例することになる。従って、テレビ
の表示画面としてＰＤＰ表示装置を利用する場合、明る
い部屋で見ても画像のコントラストが得られるように、
ＰＤＰ表示装置の画面輝度を大きく、例えば、６４表示
階調に固定して設定される。そのため、自然画等の映像
番組において、表示階調が不足し、白ツブレおよび黒ツ
ブレが発生する問題があった。2. Description of the Related Art As shown in FIG. 2, as one method in a PDP display device, for example, a driving sequence of 256 gradation display of FIG. One frame is made up of eight subfields having a relative brightness ratio of 1, 2, 4, 8, 16, 32, 64, and 128, and 256 gradations are displayed by combining the brightnesses of the eight screens. Each subfield is composed of an address period for writing refreshed data for one screen and a sustain period for determining the brightness of the subfield. In the address period, initially a wall charge is initially formed in each pixel at the same time on the entire screen, and then a sustain pulse is applied to the entire screen.
Display. The brightness of the subfield is proportional to the number of sustain pulses and set to a predetermined brightness. However, in the driving sequence based on the technique of the address / display separation type subfield method, as shown in FIG. 3, the number of display gradations is determined by the number of subfields per frame. For example, when the number of subfields is 6, One frame has a relative luminance ratio of 1, 2, 4, 8, 16, 32, which is 6
Since the number of display gradations is 64, the display screen brightness is inversely proportional to the number of subfields per frame under the condition that the address period is constant. Number 64, 128, 25
When it is increased to 6, the display screen brightness level changes correspondingly to high, medium and low. In other words, the display screen brightness and the number of display gradations are in a trade-off relationship. If the number of subfields per frame is represented by n and the address period (constant) is represented by the letter a, the total of the sustain periods is the total of the sustain periods = 1 frame period-nxa ... ( 1) As can be seen from the equation (1), one frame period (16.7
It is the remaining period obtained by subtracting n × a from (ms). Since the cycle of the sustain pulse for display is constant, the display screen brightness is proportional to the total sum of the same sustain period and inversely proportional to the number of subfields. Therefore, when a PDP display device is used as a display screen of a television, it is possible to obtain image contrast even when viewed in a bright room.
The screen brightness of the PDP display device is set to be large, for example, fixed to 64 display gradations. Therefore, in a video program such as a natural image, there is a problem that the display gradation is insufficient, and white blur and black blur occur.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記問題点に
鑑みなされたもので、適宜表示輝度および表示階調数を
選択し、変えることができるＰＤＰ表示装置を提供する
ことを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a PDP display device capable of appropriately selecting and changing the display brightness and the number of display gradations.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に、映像信号を入力し、原色信号および同期信号を生成
する映像信号処理部と、前記原色信号および同期信号を
入力しプラズマディスプレイを駆動する所要の駆動信号
を生成するＰＤＰ駆動部と、前記駆動信号に基づき画像
を表示するプラズマディスプレイパネルとからなるＰＤ
Ｐ表示装置において、表示画面輝度および表示階調数を
変えるためＰＤＰ駆動シーケンスにのっとる少なくとも
２種類以上の駆動信号を生成するＰＤＰ駆動部と、前記
ＰＤＰ駆動部が出力する駆動信号の種類を選択する切り
替え信号を供給する切替信号生成部とからなる。In order to achieve the above object, a video signal processing section for inputting a video signal and generating a primary color signal and a synchronizing signal, and a plasma display by inputting the primary color signal and the synchronizing signal. A PD including a PDP drive unit for generating a required drive signal and a plasma display panel for displaying an image based on the drive signal.
In a P display device, a PDP drive unit that generates at least two types of drive signals according to a PDP drive sequence for changing the display screen brightness and the number of display gradations, and a type of drive signal output by the PDP drive unit are selected. And a switching signal generator that supplies a switching signal.
【０００５】[0005]
【作用】以上のように構成したので、例えば、多くの階
調を必要とする映画等の画像、主として文字や記号等を
表示するニュース画像、あるいは、その他一般の画像な
ど画像の種類に応じてモードを切り替えた切替信号生成
部から、前記画像の種類に相応した切替信号をＰＤＰ駆
動部に供給し、画像の種類等の条件に適した表示のため
の駆動信号を選択出力する。また、部屋が暗い場合は、
表示階調を増加させて表示する。With the above-described structure, for example, images of movies or the like that require a large number of gradations, news images mainly displaying characters or symbols, or other general images are used depending on the type of image. The switching signal generation unit that has switched the mode supplies a switching signal corresponding to the type of image to the PDP driving unit, and selectively outputs a driving signal for display suitable for conditions such as the type of image. Also, if the room is dark,
Display with increased display gradation.
【０００６】[0006]
【実施例】以下、本発明によるＰＤＰ表示装置につい
て、図を用いて詳細に説明する。図１は、本発明による
ＰＤＰ表示装置の実施例ブロック図である。１は入力さ
れたコンポジットビデオ信号を輝度（Ｙ）信号および色
（Ｃ）信号に分離するＹ／Ｃ分離部である。２は、前記
Ｙ信号およびＣ信号に基づき、ＲＧＢ原色信号を得るＲ
／Ｇ／Ｂデコード部である。３は、前記アナログのＲＧ
Ｂ原色信号を、例えば、８ビットの量子化により、デジ
タル信号に変換するＡ／Ｄ変換部である。４は倍速変換
処理、画像合成、ＰＤＰ駆動部の仕様に合わせる信号処
理等を実施する信号処理部である。５はアドレス・表示
分離型サブフィールド法の技術による駆動シーケンスを
採用し、表示画面輝度および表示階調数を変えるためＰ
ＤＰ駆動シーケンスの１フレーム当たりのサブフィール
ド数を変えた少なくとも２種類以上の駆動信号を生成す
るＰＤＰ駆動部である。６は画像を表示するＰＤＰパネ
ルである。７は、前記コンポジットビデオ信号を同期分
離し、位相が調整されたクロック信号、水平および垂直
同期信号等を生成する同期分離部である。８は、前記Ｐ
ＤＰパネル６の周囲の部屋の明るさを検出する光センサ
部である。９は対象とする画像の表示モード、例えば、
ニュースモード、映画モードなどを選択入力するモード
選択部である。１０は、表示モードおよび部屋の明るさ
を条件に、前記ＰＤＰ駆動部５に相応する駆動信号の出
力を選択指示する切替信号生成部である。The PDP display device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a PDP display device according to the present invention. Reference numeral 1 is a Y / C separation unit that separates the input composite video signal into a luminance (Y) signal and a color (C) signal. 2 is an R for obtaining RGB primary color signals based on the Y signal and the C signal
/ G / B decoding unit. 3 is the analog RG
The A / D conversion unit converts the B primary color signal into a digital signal by, for example, 8-bit quantization. A signal processing unit 4 performs a double speed conversion process, an image synthesizing process, a signal process matching the specifications of the PDP drive unit, and the like. 5 adopts a driving sequence based on the address / display separation type sub-field method technology, and P is used to change the display screen brightness and the number of display gradations.
The PDP drive unit generates at least two types of drive signals by changing the number of subfields per frame of the DP drive sequence. A PDP panel 6 displays an image. Reference numeral 7 denotes a sync separation unit that synchronously separates the composite video signal and generates a phase-adjusted clock signal, horizontal and vertical sync signals, and the like. 8 is the P
It is an optical sensor unit that detects the brightness of the room around the DP panel 6. 9 is a display mode of the target image, for example,
A mode selection unit for selectively inputting a news mode, a movie mode, or the like. Reference numeral 10 denotes a switching signal generation unit for instructing the output of a drive signal corresponding to the PDP drive unit 5 under the conditions of the display mode and the brightness of the room.
【０００７】本発明によるＰＤＰ表示装置の動作を説明
する。見ている映像が、例えば、多くの階調を必要とす
る映画等の画像の場合、モード選択部９で映画モードを
選択指示することにより、切替信号生成部１０で所定の
切替信号をＰＤＰ駆動部５に供給し、同ＰＤＰ駆動部５
は、表示階調数が２５６である、１フレーム当たり８個
のサブフィールド数の駆動信号でＰＤＰパネル６を階調
が豊富な状態に表示させる。また、主として文字や記号
等を表示するニュース画像を見る場合、モード選択部９
でニュースモードを選択指示することにより、切替信号
生成部１０で所定の切替信号をＰＤＰ駆動部５に供給
し、同ＰＤＰ駆動部５は、表示階調数が６４である、１
フレーム当たり６個のサブフィールド数の駆動信号でＰ
ＤＰパネル６を明るく表示させる。また、その他一般の
画像などを見る場合、同様にして、所要の表示階調数を
選択することになるが、光センサ部８が検出した部屋の
明るさに応じ、同明るさのレベルが大で明るい時は、表
示階調数が６４である明るい状態に表示し、同明るさの
レベルが小で暗い時は、表示階調数が２５６である階調
が豊富な状態に表示させる。更に、光センサ部８が検出
した部屋の明るさが暗い場合は、現在の表示階調数から
次のステップの表示階調数に上げて表示する。例えば、
現在の表示階調数が１２８である場合、２５６に表示階
調数を増加させる。尚、表示階調数は６４、１２８、２
５６に限ったものでなく、５１２等であっても良い。The operation of the PDP display device according to the present invention will be described. When the video being viewed is, for example, an image of a movie or the like that requires a large number of gradations, the switching signal generation unit 10 drives the PDP to drive a predetermined switching signal by instructing the mode selection unit 9 to select the movie mode. Supply to the unit 5, and the same PDP drive unit 5
Causes the PDP panel 6 to be displayed in a state in which the number of gradations is 256 and the number of gradations is abundant by a drive signal of eight subfields per frame. In addition, when viewing a news image that mainly displays characters or symbols, the mode selection unit 9
By selecting and instructing the news mode with, the switching signal generating unit 10 supplies a predetermined switching signal to the PDP driving unit 5, and the PDP driving unit 5 has a display gradation number of 64.
P with a drive signal of 6 subfields per frame
The DP panel 6 is displayed brightly. In addition, when viewing other general images, similarly, the required number of display gradations is selected, but the level of the same brightness is large depending on the brightness of the room detected by the optical sensor unit 8. When it is bright, it is displayed in a bright state where the number of display gradations is 64, and when the level of the same brightness is small and dark, it is displayed in a state where there are a large number of gradations where the number of display gradations is 256. Further, when the brightness of the room detected by the optical sensor unit 8 is dark, the display gradation number is increased from the current display gradation number to the display gradation number of the next step and displayed. For example,
If the current number of display gradations is 128, the number of display gradations is increased to 256. The number of display gradations is 64, 128, 2
The number is not limited to 56, and may be 512 or the like.
【０００８】[0008]
【発明の効果】以上説明したように、本発明は適宜表示
輝度および表示階調数を選択し、変えることができるＰ
ＤＰ表示装置を提供する。従って、見たい画像に応じ階
調が豊富で白ツブレあるいは黒ツブレがない状態の高画
質の絵を表示でき、また、周囲の明るさによるコントラ
ストの低下を防止した見やすい絵を表示できるメリット
がある。As described above, according to the present invention, the display brightness and the number of display gradations can be appropriately selected and changed.
A DP display device is provided. Therefore, there is an advantage that it is possible to display a high-quality picture in which the gradation is abundant and there is no white blur or black blur depending on the image to be viewed, and which is possible to display an easy-to-see picture that prevents the decrease in contrast due to the ambient brightness. .
【図１】本発明によるＰＤＰ表示装置の実施例ブロック
図である。FIG. 1 is a block diagram of an embodiment of a PDP display device according to the present invention.
【図２】ＰＤＰ表示装置で１つの方法として実施されて
いる、アドレス・表示分離型サブフィールド法の技術に
よる階調表示の駆動シーケンスである。FIG. 2 is a driving sequence for gradation display by a technique of an address / display separation type subfield method, which is implemented as one method in a PDP display device.
【図３】アドレス・表示分離型サブフィールド法の技術
による駆動シーケンスを採用した場合の表示階調数と、
１フレーム当たりのサブフィールド数と、サステイン期
間合計と、表示画面輝度との関係を示す表である。FIG. 3 shows the number of display gradations when a drive sequence based on the address / display separation type subfield method is adopted,
7 is a table showing the relationship between the number of subfields per frame, the total sustain period, and the display screen brightness.
１ Ｙ／Ｃ分離部 ２ Ｒ／Ｇ／Ｂデコード部 ３ Ａ／Ｄ変換部 ４ 信号処理部 ５ ＰＤＰ駆動部 ６ ＰＤＰパネル ７ 同期分離部 ８ 光センサ部 ９ モード選択部 １０ 切替信号生成部 1 Y / C separation section 2 R / G / B decoding section 3 A / D conversion section 4 Signal processing section 5 PDP drive section 6 PDP panel 7 Sync separation section 8 Optical sensor section 9 Mode selection section 10 Switching signal generation section
Claims (5)
信号を生成する映像信号処理部と、前記原色信号および
同期信号を入力しプラズマディスプレイを駆動する所要
の駆動信号を生成するＰＤＰ駆動部と、前記駆動信号に
基づき画像を表示するプラズマディスプレイパネルとか
らなるＰＤＰ表示装置において、 表示画面輝度および表示階調数を変えるためＰＤＰ駆動
シーケンスにのっとる少なくとも２種類以上の駆動信号
を生成するＰＤＰ駆動部と、前記ＰＤＰ駆動部が出力す
る駆動信号の種類を選択する切り替え信号を供給する切
替信号生成部とからなることを特徴とするＰＤＰ表示装
置。1. A video signal processing unit for inputting a video signal to generate a primary color signal and a sync signal, and a PDP driving unit for inputting the primary color signal and a sync signal to generate a required drive signal for driving a plasma display. In a PDP display device comprising a plasma display panel for displaying an image based on the drive signal, a PDP drive unit for generating at least two kinds of drive signals according to a PDP drive sequence for changing display screen brightness and display gray scale number. And a switching signal generation unit for supplying a switching signal for selecting the type of drive signal output from the PDP drive unit.
・表示分離型サブフィールド法の技術による駆動シーケ
ンスを採用し、表示画面輝度および表示階調数を変える
ためＰＤＰ駆動シーケンスの１フレーム当たりのサブフ
ィールド数を変えた少なくとも２種類以上の駆動信号を
生成するＰＤＰ駆動部でなる請求項１記載のＰＤＰ表示
装置。2. The number of subfields per frame of the PDP drive sequence for changing the display screen brightness and the number of display gradations by adopting a drive sequence based on the technology of address / display separation type subfield method for the PDP drive sequence. The PDP display device according to claim 1, comprising a PDP drive unit that generates at least two types of drive signals with different values.
部を備える請求項１記載のＰＤＰ表示装置。3. The PDP display device according to claim 1, further comprising a mode selection unit for selecting a display mode.
るさを検出し、検出結果を切替信号生成部に供給する光
センサを備える請求項１記載のＰＤＰ表示装置。4. The PDP display device according to claim 1, further comprising an optical sensor that detects the ambient brightness of the plasma display panel and supplies the detection result to the switching signal generation unit.
じた所要の表示モード入力および周囲の明るさに応じ、
異なる切り替え信号を出力する請求項１記載のＰＤＰ表
示装置。5. The switching signal generating section is adapted to input a required display mode in accordance with the type of image and ambient brightness.
The PDP display device according to claim 1, which outputs different switching signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5219935A JPH0772825A (en) | 1993-09-03 | 1993-09-03 | Pdp display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5219935A JPH0772825A (en) | 1993-09-03 | 1993-09-03 | Pdp display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0772825A true JPH0772825A (en) | 1995-03-17 |
Family
ID=16743336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5219935A Pending JPH0772825A (en) | 1993-09-03 | 1993-09-03 | Pdp display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0772825A (en) |
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