JPH08272316A - Led display and led display system - Google Patents
Led display and led display systemInfo
- Publication number
- JPH08272316A JPH08272316A JP7073808A JP7380895A JPH08272316A JP H08272316 A JPH08272316 A JP H08272316A JP 7073808 A JP7073808 A JP 7073808A JP 7380895 A JP7380895 A JP 7380895A JP H08272316 A JPH08272316 A JP H08272316A
- Authority
- JP
- Japan
- Prior art keywords
- led
- display
- signal
- green
- display data
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、ＮＴＳＣ方式の映像
信号と同等の色再現を実現するＬＥＤ表示器及びＬＥＤ
表示システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED display and an LED that realize color reproduction equivalent to that of an NTSC video signal.
Display system.
【０００２】[0002]
【従来の技術】図７は赤、緑、青の３原色のＬＥＤ（発
光ダイオード）を使用した従来のＬＥＤ表示器、ＮＴＳ
Ｃ方式の映像信号及びＮＴＳＣ方式の一ＣＲＴのそれぞ
れの３原色の色度座標を示す色度図である。なお、図７
中でＬＥＤ表示器の３つの色度座標は○印で示し、ＮＴ
ＳＣ方式の映像信号の３つの色度座標は●印で示し、Ｎ
ＴＳＣ方式のＣＲＴの３つの色度座標は×印で示してい
る。2. Description of the Related Art FIG. 7 shows a conventional LED display, NTS, which uses LEDs (light emitting diodes) of three primary colors of red, green and blue.
FIG. 6 is a chromaticity diagram showing chromaticity coordinates of three primary colors of a C system video signal and an NTSC one CRT. Note that FIG.
In the figure, the three chromaticity coordinates of the LED display are indicated by circles, and NT
The three chromaticity coordinates of the SC video signal are indicated by ●, and N
The three chromaticity coordinates of the TSC CRT are indicated by crosses.
【０００３】図７において、ＬＥＤ表示器の３原色の
内、赤色と青色の色度座標は、色度図中でＮＴＳＣ方式
及びＣＲＴの赤色と青色の色度座標はほぼ同様の位置に
ある。したがて、ＬＥＤ表示器の赤色及び青色とＮＴＳ
Ｃ方式のＣＲＴの赤色及び青色とでは、目視において色
再現にほとんど差が認められず、赤色ならびに青色に関
しては両者に相違はなかった。In FIG. 7, of the three primary colors of the LED display, the chromaticity coordinates of red and blue are substantially the same as the chromaticity coordinates of red and blue of the NTSC system and CRT in the chromaticity diagram. Therefore, LED display red and blue and NTS
Little difference in color reproduction was visually observed between the C-type CRT red and blue, and there was no difference between red and blue.
【０００４】しかしながら、図７において、ＬＥＤ表示
器の緑色の色度座標はＮＴＳＣ方式及びＣＲＴの緑色の
色度座標とかなりずれており、ＬＥＤ表示器の緑色とＮ
ＴＳＣ方式のＣＲＴの緑色とでは、目視において色再現
に差が認められ、緑色に関しては両画像に相違が生じて
いた。したがって、ＮＴＳＣ方式の映像信号でＬＥＤ表
示器に画像を表示する場合には、緑色の色再現に誤差が
生じていたため、この誤差を補正しなければならなかっ
た。このため、複雑な色補正回路が必要になっていた。However, in FIG. 7, the chromaticity coordinates of the green color of the LED display deviate considerably from the chromaticity coordinates of the green color of the NTSC system and the CRT, and the green color of the LED display and the N color coordinates of
A difference in color reproduction was visually recognized from the green color of the TSC CRT, and there was a difference in both images with respect to the green color. Therefore, when an image is displayed on the LED display with the NTSC video signal, an error occurs in the color reproduction of green, and this error has to be corrected. Therefore, a complicated color correction circuit is needed.
【０００５】一方、図７において、ＬＥＤ表示器におけ
る緑色のＬＥＤには、５６０ｎｍ程度の発光波長のもの
が使用されている。この緑色のＬＥＤは他の表示用の素
子に比べて発光スペクトルが比較的狭くなることから、
ＬＥＤの緑色の色度座標は、ＮＴＳＣ方式の緑色の色度
座標が色度曲線の内側に位置するのに対して、色度曲線
上のほぼ５６０ｎｍの位置にあった。このため、図７に
おいて、色度（ｘ，ｙ）＝（０．３１，０．３１）の白
色点は、ＬＥＤの３つの色度座標を結ぶ領域の中心から
大きくずれていた。このずれにより、ＬＥＤの白色表示
時に高い輝度が得られなかった。On the other hand, in FIG. 7, a green LED having an emission wavelength of about 560 nm is used in the LED display. This green LED has a relatively narrow emission spectrum compared to other display elements,
The green chromaticity coordinates of the LED were at a position of approximately 560 nm on the chromaticity curve, whereas the NTSC green chromaticity coordinates were located inside the chromaticity curve. Therefore, in FIG. 7, the white point of chromaticity (x, y) = (0.31, 0.31) was largely displaced from the center of the region connecting the three chromaticity coordinates of the LED. Due to this shift, high brightness could not be obtained during white display of the LED.
【０００６】[0006]
【発明が解決しようとする課題】以上説明したように、
従来のＬＥＤ表示器とＮＴＳＣ方式のＣＲＴとでは、緑
色表示において大きな色差があるため、ＮＴＳＣ方式の
映像信号をＬＥＤ表示器で再生する場合には、緑色の誤
差を補正しなければならなかった。このため、補正のた
めの高度な補正回路が必要となり、構成の大型化ならび
に複雑化を招いていた。As described above,
Since there is a large color difference in the green display between the conventional LED display and the NTSC CRT, it is necessary to correct the green error when the NTSC video signal is reproduced by the LED display. For this reason, a sophisticated correction circuit for correction is required, which causes an increase in size and complexity of the configuration.
【０００７】また、色度図における白色点が色度図にお
けるＬＥＤ表示器の色再現領域の中心からずれているた
め、白色表示の際に十分な輝度が得られないという不具
合を招いていた。Further, since the white point in the chromaticity diagram is displaced from the center of the color reproduction area of the LED display in the chromaticity diagram, there has been a problem that sufficient brightness cannot be obtained in white display.
【０００８】そこで、この発明は、上記に鑑みてなされ
たものであり、その目的とするところは、高度な色補正
回路を使用することなく、ＮＴＳＣ方式の映像信号の表
示色と同等の表示色を得ることが可能なＬＥＤ表示器及
びＬＥＤ表示システムを提供することにある。Therefore, the present invention has been made in view of the above, and an object of the present invention is to provide a display color equivalent to the display color of an NTSC system video signal without using an advanced color correction circuit. An object of the present invention is to provide an LED display and an LED display system capable of obtaining the above.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、請求項１記載の発明は、赤色ＬＥＤ（発光ダイオー
ド）と、青色ＬＥＤと、最濃緑色波長よりも長い発光波
長の第１の緑色ＬＥＤと、最濃緑色波長よりも短い発光
波長の第２の緑色ＬＥＤとを少なくとも含む複数のＬＥ
Ｄを表示単位の１ドットとして構成される。In order to achieve the above object, the invention according to claim 1 provides a red LED (light emitting diode), a blue LED, and a first emission wavelength longer than the deepest green wavelength. A plurality of LEs including at least a green LED and a second green LED having an emission wavelength shorter than the deepest green wavelength
D is configured as one dot of the display unit.
【００１０】請求項４記載の発明は、請求項１記載のＬ
ＥＤ表示器と、前記ＬＥＤ表示器のＲ（赤）Ｇ（緑）Ｂ
（青）信号の表示データを出力する出力手段と、前記出
力手段から出力されたＲ信号の表示データを増幅するＲ
信号増幅器と、前記出力手段から出力されたＢ信号の表
示データを増幅するＢ信号増幅器と、前記出力手段から
出力されたＧ信号の表示データを第１のゲインに増幅す
る第１のＧ信号増幅器と、前記出力手段から出力された
Ｇ信号の表示データを第２のゲインに増幅する第２のＧ
信号増幅器と、Ｒ信号増幅器により増幅された表示デー
タをＡ／Ｄ変換し、デジタル信号に変換された表示デー
タを前記ＬＥＤ表示器の赤色ＬＥＤの駆動信号として前
記ＬＥＤ表示器に供給するＡ／Ｄ変換器と、Ｂ信号増幅
器により増幅された表示データをＡ／Ｄ変換し、デジタ
ル信号に変換された表示データを前記ＬＥＤ表示器の青
色ＬＥＤの駆動信号として前記ＬＥＤ表示器に供給する
Ａ／Ｄ変換器と、第１のＧ信号増幅器により増幅された
表示データをＡ／Ｄ変換し、デジタル信号に変換された
表示データを前記ＬＥＤ表示器の第１の緑色ＬＥＤの駆
動信号として前記ＬＥＤ表示器に供給するＡ／Ｄ変換器
と、第２のＧ信号増幅器により増幅された表示データを
Ａ／Ｄ変換し、デジタル信号に変換された表示データを
前記ＬＥＤ表示器の第２の緑色ＬＥＤの駆動信号として
前記ＬＥＤ表示器に供給するＡ／Ｄ変換器とから構成さ
れる。The invention according to claim 4 is the L according to claim 1.
ED display and R (red) G (green) B of the LED display
Output means for outputting display data of (blue) signal, and R for amplifying display data of R signal output from the output means
A signal amplifier, a B signal amplifier that amplifies the display data of the B signal output from the output means, and a first G signal amplifier that amplifies the display data of the G signal output from the output means to a first gain. And a second G for amplifying the display data of the G signal output from the output means to a second gain.
A / D conversion is performed on the display data amplified by the signal amplifier and the R signal amplifier, and the display data converted into a digital signal is supplied to the LED display as a drive signal for the red LED of the LED display. A / D conversion is performed on the display data amplified by the converter and the B signal amplifier, and the display data converted into a digital signal is supplied to the LED display as a drive signal for the blue LED of the LED display. The converter and A / D conversion of the display data amplified by the first G signal amplifier, and the display data converted into a digital signal is used as a drive signal for the first green LED of the LED display. And the display data amplified by the second G signal amplifier is A / D converted, and the display data converted into a digital signal is converted into the LED display. Composed of the supplied A / D converter to the LED indicator as drive signals of the second green LED.
【００１１】請求項５記載の発明は、請求項１記載のＬ
ＥＤ表示器と、前記ＬＥＤ表示器のＲ（赤）Ｇ（緑）Ｂ
（青）信号の表示データを出力する出力手段と、前記出
力手段から出力されたＲ信号の表示データをＡ／Ｄ変換
し、デジタル信号に変換された表示データを前記ＬＥＤ
表示器の赤色ＬＥＤの駆動信号として前記ＬＥＤ表示器
に供給するするＲ信号用Ａ／Ｄ変換器と、前記出力手段
から出力されたＢ信号の表示データをＡ／Ｄ変換し、デ
ジタル信号に変換された表示データを前記ＬＥＤ表示器
の青色ＬＥＤの駆動信号として前記ＬＥＤ表示器に供給
するするＢ信号用Ａ／Ｄ変換器と、前記出力手段から出
力されたＧ信号の表示データをＡ／Ｄ変換するＧ信号用
Ａ／Ｄ変換器と、前記Ｇ信号用Ａ／Ｄ変換器により得ら
れた表示データに第１の乗数を乗算し、得られた表示デ
ータを前記ＬＥＤ表示器の第１の緑色ＬＥＤの駆動信号
として前記ＬＥＤ表示器に供給する第１のマルチプライ
ヤーと、前記Ｇ信号用Ａ／Ｄ変換器により得られた表示
データに第２の乗数を乗算し、得られた表示データを前
記ＬＥＤ表示器の第２の緑色ＬＥＤの駆動信号として前
記ＬＥＤ表示器に供給する第２のマルチプライヤーとか
ら構成される。The invention according to claim 5 is the L according to claim 1.
ED display and R (red) G (green) B of the LED display
Output means for outputting display data of a (blue) signal, A / D conversion of display data of the R signal output from the output means, and display data converted to a digital signal by the LED
A / D converter for R signal, which is supplied to the LED display as a drive signal of the red LED of the display, and A / D conversion of display data of the B signal output from the output means, and converted into a digital signal. A / D converter for B signal that supplies the displayed display data to the LED display as a drive signal for the blue LED of the LED display, and A / D for the display data of the G signal output from the output means. The A / D converter for G signal to be converted and the display data obtained by the A / D converter for G signal are multiplied by a first multiplier, and the obtained display data is stored in the first LED display unit. The display data obtained by the first multiplier supplied to the LED display as a driving signal for the green LED and the A / D converter for the G signal is multiplied by the second multiplier to obtain the obtained display data. Of the LED display It comprised of a second multiplier supplied to the LED display as a drive signal of the second green LED.
【００１２】[0012]
【作用】上記構成において、請求項１記載の発明は、最
濃緑色波長よりも長い発光波長の第１の緑色ＬＥＤと、
最濃緑色波長よりも短い発光波長の第２の緑色ＬＥＤと
を少なくとも含むでＬＥＤ表示器の１ドットを構成する
ようにしている。In the above structure, the invention according to claim 1 has a first green LED having an emission wavelength longer than the deepest green wavelength,
One dot of the LED display is configured to include at least the second green LED having an emission wavelength shorter than the deepest green wavelength.
【００１３】請求項４記載の発明は、第１の緑色ＬＥＤ
の発光量に応じてＧ信号の表示データを増幅して第１の
緑色ＬＥＤの駆動信号を得るようにし、第２の緑色ＬＥ
Ｄの発光量に応じてＧ信号の表示データを増幅して第２
の緑色ＬＥＤの駆動信号を得るようにしている。The invention according to claim 4 is the first green LED.
The display data of the G signal is amplified according to the light emission amount of the second green LED to obtain the driving signal of the first green LED.
The display data of the G signal is amplified according to the light emission amount of D
The green LED drive signal is obtained.
【００１４】請求項５記載の発明は、第１の緑色ＬＥＤ
の発光量に応じた乗数をＧ信号の表示データに乗算して
第１の緑色ＬＥＤの駆動信号を得るようにし、第２の緑
色ＬＥＤの発光量に応じた乗数をＧ信号の表示データに
乗算して第２の緑色ＬＥＤの駆動信号を得るようにして
いる。The invention according to claim 5 is the first green LED.
To multiply the display data of the G signal by a multiplier corresponding to the amount of light emission of the first green LED, and to multiply the display data of the G signal by a multiplier corresponding to the amount of light emission of the second green LED. Then, the drive signal of the second green LED is obtained.
【００１５】[0015]
【実施例】以下、図面を用いてこの発明の実施例を説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１６】図１及び図２は請求項１記載の発明の一実
施例に係わるＬＥＤ表示器の構成を示す図である。1 and 2 are views showing the construction of an LED display device according to an embodiment of the present invention.
【００１７】図１において、ＬＥＤ表示器は、赤色ＬＥ
Ｄ（Ｒ）と、青色ＬＥＤ（Ｂ）と、最濃緑色波長となる
５２０ｎｍ程度の波長よりも長い発光波長の例えば５６
０ｎｍの第１の緑色ＬＥＤ（Ｇ１）と、最濃緑色波長よ
りも短い発光波長の例えば５００ｎｍの第２の緑色ＬＥ
Ｄ（Ｇ２）とを表示単位の１ドットとして構成されてお
り、赤色ＬＥＤと青色ＬＥＤとが対角線上に配置され第
１の緑色ＬＥＤと第２の緑色ＬＥＤとが対角線上に配列
されている。In FIG. 1, the LED indicator is red LE.
D (R), blue LED (B), and an emission wavelength of, for example, 56, which is longer than the wavelength of 520 nm, which is the darkest green wavelength.
A first green LED (G1) of 0 nm and a second green LE of an emission wavelength shorter than the deepest green wavelength, for example 500 nm.
D (G2) is configured as one dot as a display unit, a red LED and a blue LED are arranged on a diagonal line, and a first green LED and a second green LED are arranged on a diagonal line.
【００１８】なお、最濃緑色波長を色度図において５２
０ｎｍ程度としたが、５１０ｎｍ程度〜５３０ｎｍ程度
の範囲内で許容されるものとする。The darkest green wavelength is 52 in the chromaticity diagram.
Although it is set to about 0 nm, it is allowed within a range of about 510 nm to 530 nm.
【００１９】このようなＬＥＤ組１は、図２に示すよう
にマトリクス状に配列されてマスク２とともにＬＥＤ表
示部３を構成し、このＬＥＤ表示部３は、ＬＥＤ表示部
３の下に設けられた制御基板４に形成された回路によっ
て駆動制御され、ＬＥＤ表示部３と制御基板４とでＬＥ
Ｄ表示器が構成されている。The LED set 1 as described above is arranged in a matrix as shown in FIG. 2 and constitutes an LED display section 3 together with the mask 2. The LED display section 3 is provided below the LED display section 3. Driving is controlled by a circuit formed on the control board 4, and the LED display unit 3 and the control board 4 are LE
A D display is configured.
【００２０】なお、図１に示すＬＥＤ組１において、赤
色ＬＥＤ（Ｒ）と青色ＬＥＤ（Ｂ）に加えて、最濃緑色
波長となる５２０ｎｍ程度の波長よりも長い発光波長の
第１の緑色ＬＥＤ（Ｇ１）と、最濃緑色波長よりも短い
発光波長の第２の緑色ＬＥＤ（Ｇ２）を少なくとも１つ
含んでいればよく、それぞれ１つづつの赤色ＬＥＤと青
色ＬＥＤに加えて例えば２つの第１の緑色ＬＥＤと１つ
の第２のＬＥＤとでＬＥＤ組を構成するようにしてもよ
い。In addition, in the LED set 1 shown in FIG. 1, in addition to the red LED (R) and the blue LED (B), the first green LED having an emission wavelength longer than the wavelength of 520 nm which is the darkest green wavelength. (G1) and at least one second green LED (G2) having an emission wavelength shorter than the deepest green wavelength are included, and in addition to one red LED and one blue LED, for example, two first LEDs. The green LED and one second LED may form an LED set.
【００２１】このようなＬＥＤ組１を１ドットとするＬ
ＥＤ表示器の色度図は、図３に示すようになる。図３に
示す色度図において、赤色の色度座標及び青色の色度座
標においては図７に示す従来の色度座標と同一となる。
一方、緑色の色度座標は、２つの緑色ＬＥＤを使用して
いることから、色度曲線の５６０ｎｍと５００ｎｍの近
傍の内側の２箇所となる。したがって、上記構成のＬＥ
Ｄ表示器における表示色は、図３に示す色度図におい
て、赤色の色度座標と青色の色度座標及び２つの緑色の
色度座標の４つの色度座標を結ぶ矩形領域の内側で示す
範囲となる。The LED set 1 as described above has one dot L
The chromaticity diagram of the ED display is as shown in FIG. In the chromaticity diagram shown in FIG. 3, the chromaticity coordinates of red and the chromaticity coordinates of blue are the same as the conventional chromaticity coordinates shown in FIG.
On the other hand, since two green LEDs are used, the chromaticity coordinates of green are two locations inside the vicinity of 560 nm and 500 nm of the chromaticity curve. Therefore, the LE having the above configuration
The display color on the D display is shown inside the rectangular area connecting the four chromaticity coordinates of the red chromaticity coordinate, the blue chromaticity coordinate, and the two green chromaticity coordinates in the chromaticity diagram shown in FIG. It becomes a range.
【００２２】そこで、このような表示色を有するＬＥＤ
表示器において、第１の緑色ＬＥＤと第２の緑色ＬＥＤ
の発光量を調整することにより、図３に示す色度図上の
第１の緑色ＬＥＤの色度座標と第２の緑色ＬＥＤの色度
座標を結ぶ直線上で緑色の色合いを調整することが可能
となる。したがって、図３に示す色度図における第１の
緑色ＬＥＤの色度座標と第２の緑色ＬＥＤの色度座標を
結ぶ直線上に位置するＣＲＴの色度座標に対応した緑色
に合わせるように第１の緑色ＬＥＤの発光量と第２の緑
色ＬＥＤの発光量を調整することにより、特別な色補正
回路を用いることなく図７に示す従来のＣＲＴと同様の
表示色を得ることができる。また、色度図における赤、
青、緑のそれぞれの色度座標を結ぶ直線で囲まれる発色
領域の中心域に白色点が位置するようになるので、従来
に比べて輝度の高い白色表示を行うことができる。Therefore, an LED having such a display color
In the display, the first green LED and the second green LED
It is possible to adjust the hue of green on the straight line connecting the chromaticity coordinates of the first green LED and the chromaticity coordinates of the second green LED on the chromaticity diagram shown in FIG. It will be possible. Therefore, in the chromaticity diagram shown in FIG. 3, the green color corresponding to the chromaticity coordinates of the CRT located on the straight line connecting the chromaticity coordinates of the first green LED and the chromaticity coordinates of the second green LED is adjusted to match the green color. By adjusting the light emission amount of the first green LED and the light emission amount of the second green LED, it is possible to obtain a display color similar to that of the conventional CRT shown in FIG. 7 without using a special color correction circuit. Also, red in the chromaticity diagram,
Since the white point comes to be located in the central area of the coloring area surrounded by the straight line connecting the chromaticity coordinates of blue and green, it is possible to perform white display with higher brightness than in the past.
【００２３】なお、図７に示すような表示色特性を有す
るＣＲＴの他の表示色特性を有するＣＲＴの表示色を得
る場合には、最濃緑色波長の５２０ｎｍ程度の波長を境
にして、最濃緑色波長よりも長い発光波長の第１の緑色
ＬＥＤに対応した色度座標と最濃緑色波長よりも短い発
光波長の第２の緑色ＬＥＤに対応した色度座標とを結ぶ
直線上にＣＲＴの緑色の色度座標が位置するように、両
緑色ＬＥＤの発光波長を設定するようにすればよい。In order to obtain a display color of a CRT having other display color characteristics than the CRT having the display color characteristics as shown in FIG. 7, the maximum dark green wavelength of about 520 nm is used as a boundary. The chromaticity coordinate corresponding to the first green LED having an emission wavelength longer than the dark green wavelength and the chromaticity coordinate corresponding to the second green LED having an emission wavelength shorter than the deepest green wavelength are connected to each other on the straight line of the CRT. The emission wavelengths of both green LEDs may be set so that the chromaticity coordinates of green are located.
【００２４】このような手法にしたがって、図４に示す
ように、例えば第１の緑色ＬＥＤの発光波長を５６０ｎ
ｍ程度とし、第２の緑色ＬＥＤの発光波長を５１５ｎｍ
程度とすることにより、ＮＴＳＣ方式の映像信号に対応
させることが可能となる。According to such a method, as shown in FIG. 4, for example, the emission wavelength of the first green LED is set to 560n.
m and the emission wavelength of the second green LED is 515 nm
Depending on the degree, it becomes possible to support an NTSC video signal.
【００２５】図５又は図６は上記した２つの緑色ＬＥＤ
を備えたＬＥＤ表示器を駆動制御するＬＥＤ表示システ
ムの構成を示す図である。FIG. 5 or FIG. 6 shows the two green LEDs described above.
It is a figure which shows the structure of the LED display system which drives-controls the LED display provided with.
【００２６】図５において、ＬＥＤ表示システムは、表
示データを発生する例えばパーソナルコンピュータ（Ｐ
Ｃ）５から出力されたＲＧＢ信号の表示データのうち、
Ｒ信号とＢ信号の表示データはそれぞれ対応するバッフ
ァ６を介してそれぞれ対応する増幅器７に与えられ、増
幅器７の可変抵抗８によりゲインが調整される。一方、
ＰＣ５から出力されたＧ信号の表示データはそれぞれ対
応するバッファ６を介して２つの増幅器７ｇ1,７ｇ2 に
与えられ、それぞれの増幅器７ｇ1,７ｇ2 の可変抵抗８
ｇ1,８ｇ2 によりゲインがそれぞれ独立に調整されて、
Ｇ１信号とＧ２信号の表示データが生成される。それぞ
れの増幅器７でゲインが調整された表示データはそれぞ
れ対応したＡ／Ｄ変換器９により例えば８ビットのデジ
タル信号の表示データに変換されて、ＬＥＤ表示器１０
に与えられ、それぞれのＬＥＤが駆動制御される。In FIG. 5, the LED display system is, for example, a personal computer (P
C) Of the display data of RGB signals output from 5,
The display data of the R signal and the B signal are given to the corresponding amplifiers 7 via the corresponding buffers 6, and the gains are adjusted by the variable resistors 8 of the amplifiers 7. on the other hand,
The display data of the G signal output from the PC 5 is given to the two amplifiers 7g1 and 7g2 through the corresponding buffers 6, and the variable resistors 8 of the amplifiers 7g1 and 7g2 are supplied.
Gain is adjusted independently by g1 and 8g2,
Display data of the G1 signal and the G2 signal is generated. The display data whose gain has been adjusted by each amplifier 7 is converted into display data of, for example, an 8-bit digital signal by the corresponding A / D converter 9, and the LED display 10
And each LED is driven and controlled.
【００２７】このような表示システムにおいては、それ
ぞれの緑色ＬＥＤの発光量はそれぞれ対応する増幅器８
ｇ1,８ｇ2 のゲインによって決定できるので、２つの緑
色ＬＥＤの発光色が図３又は図４に示す位置となるよう
にそれぞれの増幅器８ｇ1,８ｇ2 のゲインを調整するこ
とによって、従来の構成に比べてさほど大型化すること
なく、また緑色の発光量を容易に変化させることが可能
なＬＥＤ表示器の表示システムを提供することができ
る。In such a display system, the amount of light emitted from each green LED corresponds to the corresponding amplifier 8.
Since it can be determined by the gains of g1 and 8g2, the gains of the amplifiers 8g1 and 8g2 are adjusted so that the emission colors of the two green LEDs are at the positions shown in FIG. It is possible to provide a display system of an LED display device capable of easily changing the amount of emitted light of green color without increasing the size so much.
【００２８】図６に示す表示駆動制御システムの特徴と
するところは、ＰＣ５から出力されたＲＧＢ信号をＡ／
Ｄ変換器１１によりＡ／Ｄ変換した後、Ｇ信号にそれぞ
れの緑色ＬＥＤの発光量に応じて乗数Ｇ１，Ｇ２をマル
チプライヤー１２により乗算して、それぞれの緑色ＬＥ
Ｄの発光量に応じた８ビットの表示データを得るように
したことにある。このような構成においても、図５に示
す構成と同様なＬＥＤの駆動制を行うことができ、図５
に示す実施例と同様な効果を得ることができる。なお、
図６に示す構成において、マルチプライヤー１２はＬＥ
Ｄ表示器１０に設けるようにしてもよい。The display drive control system shown in FIG. 6 is characterized in that the RGB signals output from the PC 5 are
After A / D conversion by the D converter 11, the multiplier 12 multiplies the G signal by the multipliers G1 and G2 according to the light emission amount of each green LED, and the respective green LEs are multiplied.
This is to obtain 8-bit display data according to the light emission amount of D. Even in such a configuration, the drive control of the LED similar to the configuration shown in FIG. 5 can be performed.
It is possible to obtain the same effect as the embodiment shown in FIG. In addition,
In the configuration shown in FIG. 6, the multiplier 12 is LE
It may be provided in the D display 10.
【００２９】なお、上記実施例において、第１の緑色Ｌ
ＥＤの発光波長は、５５０ｎｍ〜５７０ｎｍ程度に設定
してもよく、このような場合には、製造コストが安価と
なり、比視感度が高く、高輝度のＬＥＤが得られる。In the above embodiment, the first green color L
The emission wavelength of the ED may be set to about 550 nm to 570 nm, and in such a case, the manufacturing cost becomes low, the relative luminous efficiency is high, and an LED with high brightness can be obtained.
【００３０】[0030]
【発明の効果】以上説明したように、請求項１記載の発
明によれば、最濃緑色波長よりも長い発光波長の第１の
緑色ＬＥＤと、最濃緑色波長よりも短い発光波長の第２
の緑色ＬＥＤとを少なくとも含むでＬＥＤ表示器の１ド
ットを構成するようにしているので、ＬＥＤ表示器にお
いて複雑な色補正回路を使用することなく、ＮＴＳＣ方
式の映像信号ならびにＣＲＴ表示器の表示色と同等の表
示色を実現することができる。As described above, according to the invention of claim 1, the first green LED having an emission wavelength longer than the deepest green wavelength and the second green LED having an emission wavelength shorter than the deepest green wavelength.
Since one dot of the LED display is configured to include at least the green LED of, the color of the NTSC video signal and the display of the CRT display without using a complicated color correction circuit in the LED display. It is possible to realize a display color equivalent to.
【００３１】一方、請求項４又は５記載の発明によれ
ば、従来の構成に比べてさほど大型化すること１ドット
に複数の緑色ＬＥＤを含むＬＥＤ表示器及びその駆動制
御系を備えたＬＥＤ表示システムを提供することができ
る。On the other hand, according to the invention described in claim 4 or 5, the size of the LED display is much larger than that of the conventional structure, and an LED display including a plurality of green LEDs per dot and a drive control system for the LED display. A system can be provided.
【図１】請求項１記載の発明の一実施例に係わるＬＥＤ
表示器におけるＬＥＤの配列構成を示す図である。FIG. 1 is an LED according to an embodiment of the invention described in claim 1.
It is a figure which shows the array structure of LED in a display.
【図２】請求項１記載の発明の一実施例に係わるＬＥＤ
表示器の構成を示す図である。FIG. 2 is an LED according to an embodiment of the invention described in claim 1;
It is a figure which shows the structure of a display.
【図３】図１及び図２に示すＬＥＤ表示器の色度図であ
る。FIG. 3 is a chromaticity diagram of the LED display shown in FIGS. 1 and 2.
【図４】図１及び図２に示すＬＥＤ表示器の色度図であ
る。FIG. 4 is a chromaticity diagram of the LED display shown in FIGS. 1 and 2.
【図５】図１及び図２に示すＬＥＤ表示器を含むＬＥＤ
表示システムの構成を示す図である。FIG. 5 is an LED including the LED display shown in FIGS. 1 and 2;
It is a figure which shows the structure of a display system.
【図６】図１及び図２に示すＬＥＤ表示器を含むＬＥＤ
表示システムの他の構成を示す図である。FIG. 6 is an LED including the LED display shown in FIGS. 1 and 2;
It is a figure which shows the other structure of a display system.
【図７】従来のＬＥＤ表示器における色度図である。FIG. 7 is a chromaticity diagram of a conventional LED display.
１ ＬＥＤ ２ マスク ３ ＬＥＤ部 ４ 制御基板 ５ パーソナルコンピュータ ６ バッファ ７ 増幅器 ８ 可変抵抗 ９，１１ Ａ／Ｄ変換器 １０ ＬＥＤ表示器 １２ マルチプライヤー 1 LED 2 Mask 3 LED Part 4 Control Board 5 Personal Computer 6 Buffer 7 Amplifier 8 Variable Resistor 9, 11 A / D Converter 10 LED Display 12 Multiplier
Claims (5)
と、 最濃緑色波長よりも短い発光波長の第２の緑色ＬＥＤと
を少なくとも含む複数のＬＥＤを表示単位の１ドットと
してなることを特徴とするＬＥＤ表示器。1. A red LED (light emitting diode), a blue LED, and a first green LED having an emission wavelength longer than the deepest green wavelength.
And a plurality of LEDs including at least a second green LED having an emission wavelength shorter than the darkest green wavelength as one dot of a display unit.
ｍ〜５７０ｎｍであることを特徴とする請求項１記載の
ＬＥＤ表示器。2. The wavelength of the first green LED is 550 n
The LED display according to claim 1, wherein the LED display has a wavelength of m to 570 nm.
第１の緑色ＬＥＤ及び前記第２の緑色ＬＥＤは、それぞ
れ矩形の角部となるように配置され、かつ前記第１の緑
色ＬＥＤ、前記第２の緑色ＬＥＤが前記矩形の対角線上
に配置されてなることを特徴とする請求項１記載のＬＥ
Ｄ表示器。3. The red LED, the blue LED, the first green LED, and the second green LED are arranged so as to form rectangular corners, and the first green LED and the second green LED are arranged. 2. The LE according to claim 1, wherein two green LEDs are arranged on a diagonal line of the rectangle.
D display.
示データを出力する出力手段と、 前記出力手段から出力されたＲ信号の表示データを増幅
するＲ信号増幅器と、 前記出力手段から出力されたＢ信号の表示データを増幅
するＢ信号増幅器と、 前記出力手段から出力されたＧ信号の表示データを第１
のゲインに増幅する第１のＧ信号増幅器と、 前記出力手段から出力されたＧ信号の表示データを第２
のゲインに増幅する第２のＧ信号増幅器と、 Ｒ信号増幅器により増幅された表示データをＡ／Ｄ変換
し、デジタル信号に変換された表示データを前記ＬＥＤ
表示器の赤色ＬＥＤの駆動信号として前記ＬＥＤ表示器
に供給する第１のＡ／Ｄ変換器と、 Ｂ信号増幅器により増幅された表示データをＡ／Ｄ変換
し、デジタル信号に変換された表示データを前記ＬＥＤ
表示器の青色ＬＥＤの駆動信号として前記ＬＥＤ表示器
に供給する第２のＡ／Ｄ変換器と、 第１のＧ信号増幅器により増幅された表示データをＡ／
Ｄ変換し、デジタル信号に変換された表示データを前記
ＬＥＤ表示器の第１の緑色ＬＥＤの駆動信号として前記
ＬＥＤ表示器に供給する第３のＡ／Ｄ変換器と、 第２のＧ信号増幅器により増幅された表示データをＡ／
Ｄ変換し、デジタル信号に変換された表示データを前記
ＬＥＤ表示器の第２の緑色ＬＥＤの駆動信号として前記
ＬＥＤ表示器に供給する第４のＡ／Ｄ変換器とを有する
ことを特徴とするＬＥＤ表示システム。4. The LED display according to claim 1, output means for outputting display data of R (red) G (green) B (blue) signals of the LED display, and output from the output means. An R signal amplifier that amplifies the display data of the R signal, a B signal amplifier that amplifies the display data of the B signal output from the output unit, and a first display data of the G signal output from the output unit.
A first G signal amplifier for amplifying the gain of the second G signal, and a second G signal display data output from the output means.
Display data amplified by the second G signal amplifier for amplifying the gain of R and the R signal amplifier, and the display data converted into the digital signal by the LED
First A / D converter for supplying to the LED display as a drive signal for the red LED of the display, and A / D conversion of the display data amplified by the B signal amplifier to display data converted into a digital signal. The LED
The second A / D converter that supplies the LED display as a drive signal for the blue LED of the display and the display data amplified by the first G signal amplifier are A / D
A third A / D converter that supplies the display data that has been D-converted and converted into a digital signal to the LED display as a drive signal for the first green LED of the LED display, and a second G signal amplifier. Display data amplified by
A fourth A / D converter that supplies the display data converted into a digital signal by D conversion to the LED display as a drive signal for the second green LED of the LED display. LED display system.
示データを出力する出力手段と、 前記出力手段から出力されたＲ信号の表示データをＡ／
Ｄ変換し、デジタル信号に変換された表示データを前記
ＬＥＤ表示器の赤色ＬＥＤの駆動信号として前記ＬＥＤ
表示器に供給するするＲ信号用Ａ／Ｄ変換器と、 前記出力手段から出力されたＢ信号の表示データをＡ／
Ｄ変換し、デジタル信号に変換された表示データを前記
ＬＥＤ表示器の青色ＬＥＤの駆動信号として前記ＬＥＤ
表示器に供給するするＢ信号用Ａ／Ｄ変換器と、 前記出力手段から出力されたＧ信号の表示データをＡ／
Ｄ変換するＧ信号用Ａ／Ｄ変換器と、 前記Ｇ信号用Ａ／Ｄ変換器により得られた表示データに
第１の乗数を乗算し、得られた表示データを前記ＬＥＤ
表示器の第１の緑色ＬＥＤの駆動信号として前記ＬＥＤ
表示器に供給する第１のマルチプライヤーと、 前記Ｇ信号用Ａ／Ｄ変換器により得られた表示データに
第２の乗数を乗算し、得られた表示データを前記ＬＥＤ
表示器の第２の緑色ＬＥＤの駆動信号として前記ＬＥＤ
表示器に供給する第２のマルチプライヤーとを有するこ
とを特徴とするＬＥＤ表示システム。5. The LED display according to claim 1, output means for outputting display data of R (red) G (green) B (blue) signals of the LED display, and output from the output means. Display data of R signal is A /
The display data that has been D-converted and converted into a digital signal is used as a drive signal for the red LED of the LED display unit to drive the LED.
A / D converter for R signal to be supplied to the display device, and A / D converter for displaying the display data of the B signal output from the output means.
The display data that has been D-converted and converted into a digital signal is used as a drive signal for the blue LED of the LED display.
A / D converter for B signal supplied to the display device, and A / D converter for displaying the display data of the G signal output from the output means.
An A / D converter for G signal that performs D conversion, and a display data obtained by the A / D converter for G signal is multiplied by a first multiplier, and the obtained display data is displayed by the LED.
The LED as the driving signal of the first green LED of the display
The display data obtained by the first multiplier supplied to the display device and the A / D converter for G signal is multiplied by the second multiplier, and the obtained display data is obtained by the LED.
The LED as the driving signal of the second green LED of the display
An LED display system comprising: a second multiplier that supplies the display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07073808A JP3124208B2 (en) | 1995-03-30 | 1995-03-30 | LED display and LED display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07073808A JP3124208B2 (en) | 1995-03-30 | 1995-03-30 | LED display and LED display system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08272316A true JPH08272316A (en) | 1996-10-18 |
| JP3124208B2 JP3124208B2 (en) | 2001-01-15 |
Family
ID=13528844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07073808A Expired - Fee Related JP3124208B2 (en) | 1995-03-30 | 1995-03-30 | LED display and LED display system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3124208B2 (en) |
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- 1995-03-30 JP JP07073808A patent/JP3124208B2/en not_active Expired - Fee Related
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