JPH05283006A - Luminance adjusting method and luminance unevenness detecting device - Google Patents
Luminance adjusting method and luminance unevenness detecting deviceInfo
- Publication number
- JPH05283006A JPH05283006A JP7371192A JP7371192A JPH05283006A JP H05283006 A JPH05283006 A JP H05283006A JP 7371192 A JP7371192 A JP 7371192A JP 7371192 A JP7371192 A JP 7371192A JP H05283006 A JPH05283006 A JP H05283006A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- cathode
- emitting element
- brightness
- light
- 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
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、大画面ディスプレイ
装置の画素となる各発光素子の輝度むらを検出し、この
検出結果を輝度調整作業に利用可能にする輝度調整方法
および輝度むら検出装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brightness adjusting method and a brightness unevenness detecting device for detecting the brightness unevenness of each light emitting element forming a pixel of a large screen display device and making the detection result available for a brightness adjusting operation. It is a thing.
【0002】[0002]
【従来の技術】図3は例えば特開昭62−10849号
公報に示された従来の発光素子を示す分解斜視図であ
り、図において、1aは蛍光体9が塗布された表示部
材、1bはスペーサ、1cは各種制御電極が配置された
基板(後部パネル)である。これらは図4に示すように
組み合わせて表示管の真空容器1を構成する。2. Description of the Related Art FIG. 3 is an exploded perspective view showing a conventional light emitting device disclosed in, for example, Japanese Unexamined Patent Publication (Kokai) No. 62-10849, wherein 1a is a display member coated with a phosphor 9, and 1b is a display member. Spacers 1c are substrates (rear panels) on which various control electrodes are arranged. These are combined as shown in FIG. 4 to form the vacuum container 1 of the display tube.
【0003】2は線状のカソード、3は第1の制御電極
(走査電極)、4は第2の制御電極(データ電極)、
5,6は制御電極3,4をそれぞれ行方向および列方向
に共通に接続する配線パターン、7は発光部に対応して
開口部が設けられた遮蔽電極、8はその遮蔽電極7に設
けられた開口部、10は排気部である。また、上記蛍光
体9の上には発光効率を上げるためアルミの薄膜が蒸着
されている。2 is a linear cathode, 3 is a first control electrode (scan electrode), 4 is a second control electrode (data electrode),
Reference numerals 5 and 6 are wiring patterns for commonly connecting the control electrodes 3 and 4 in the row direction and the column direction, 7 is a shield electrode provided with an opening corresponding to the light emitting portion, and 8 is provided on the shield electrode 7. The opening 10 is an exhaust unit. Further, an aluminum thin film is vapor-deposited on the phosphor 9 in order to improve the luminous efficiency.
【0004】図5は2種類の電極3,4の配置および配
線を示す配線図である。S1〜S4は行方向に共通に接
続された走査電極3の引き出し部、D1〜D4は列方向
に共通に接続されたデータ電極4の引き出し部である。FIG. 5 is a wiring diagram showing the arrangement and wiring of the two types of electrodes 3, 4. S1 to S4 are lead portions of the scan electrodes 3 commonly connected in the row direction, and D1 to D4 are lead portions of the data electrodes 4 commonly connected in the column direction.
【0005】また、図6はそれぞれの電極に印加する信
号のタイミングチャート図、図7は画素の配列と電極の
対応関係を示す説明図、図8は各電極の電位と電子の流
れを説明する動作説明図、図9は発光素子を複数個配列
したディスプレイの正面画である。FIG. 6 is a timing chart of signals applied to the respective electrodes, FIG. 7 is an explanatory diagram showing a correspondence relationship between the pixel array and the electrodes, and FIG. 8 is a potential of each electrode and a flow of electrons. 9A and 9B are front views of a display in which a plurality of light emitting elements are arranged.
【0006】次に動作について説明する。この種の表示
装置の基本原理は、カソード2から放出された熱電子を
加速し、陽極に衝突させることにより、陽極面に塗布さ
れた蛍光体9を励起し、発光せしめるものである。すな
わち、図7において、カソード2から放出された熱電子
は、走査電極3とデータ電極4の電位の組み合わせによ
り、次のように振舞う。Next, the operation will be described. The basic principle of this type of display device is that the thermoelectrons emitted from the cathode 2 are accelerated and collide with the anode to excite the phosphor 9 coated on the anode surface to emit light. That is, in FIG. 7, the thermoelectrons emitted from the cathode 2 behave as follows depending on the combination of the potentials of the scanning electrode 3 and the data electrode 4.
【0007】 行方向に接続された走査電極3、およ
び列方向に接続されたデータ電極4がともにカソード2
に対して正の場合、データ電極4の正電位によりカソー
ド2から放出された電子は、走査電極3の電位により偏
向され、所定の開口部8を通過して陽極に達し、蛍光体
9を発光せしめる。The scan electrodes 3 connected in the row direction and the data electrodes 4 connected in the column direction are both cathodes 2.
On the other hand, when positive, the electrons emitted from the cathode 2 by the positive potential of the data electrode 4 are deflected by the potential of the scanning electrode 3, pass through the predetermined opening 8 and reach the anode, and emit the phosphor 9. Excuse me.
【0008】 走査電極3が正で、データ電極4が負
の場合、カソード2に近いデータ電極4の負電位により
カソード2近傍の電位が負になり、熱電子の放出が抑制
される。このため蛍光体9は発光しない。When the scanning electrode 3 is positive and the data electrode 4 is negative, the negative potential of the data electrode 4 near the cathode 2 causes the potential near the cathode 2 to be negative, and the emission of thermoelectrons is suppressed. Therefore, the phosphor 9 does not emit light.
【0009】 走査電極3が負で、データ電極4が正
の場合、次の2通りの場合がある。 a 他方の走査電極3が正の場合は、カソード2から放
出された熱電子は走査電極3の電位により他方の走査電
極3側へ偏向され、蛍光体9は発光しない。When the scan electrode 3 is negative and the data electrode 4 is positive, there are the following two cases. a When the other scanning electrode 3 is positive, the thermoelectrons emitted from the cathode 2 are deflected to the other scanning electrode 3 side by the potential of the scanning electrode 3, and the phosphor 9 does not emit light.
【0010】b 他方の走査電極3も負の場合は、デー
タ電極4の電位は正であるが、データ電極4の面積が小
さいため、両側の走査電極3の負の電位の影響により、
カソード2近傍は負となり、熱電子の放出が抑制された
蛍光体9は発光しない。B If the other scanning electrode 3 is also negative, the potential of the data electrode 4 is positive, but since the area of the data electrode 4 is small, due to the influence of the negative potential of the scanning electrodes 3 on both sides,
The vicinity of the cathode 2 becomes negative, and the phosphor 9 in which the emission of thermoelectrons is suppressed does not emit light.
【0011】 走査電極3、データ電極4ともに負の
場合は、カソード2近傍の電位が負になり、熱電子の放
出が抑制され、蛍光体9は発光しない。この結果、図5
の配線関係と、図7の画素の配列との関係により、正の
電位が印加される行の走査電極3および列のデータ電極
4の交点に位置する蛍光体9が発光することになる。When both the scan electrode 3 and the data electrode 4 are negative, the potential in the vicinity of the cathode 2 becomes negative, the emission of thermoelectrons is suppressed, and the phosphor 9 does not emit light. As a result, FIG.
7 and the arrangement of the pixels in FIG. 7, the phosphors 9 located at the intersections of the scanning electrodes 3 in the rows and the data electrodes 4 in the columns to which a positive potential is applied emit light.
【0012】そして、まず、引き出し部S1に信号が印
加された場合、蛍光部P11〜P14が選択され、これ
らがデータ電極4の引き出し部D1〜D4の電位にした
がって発光する。次に、引き出し部S2に信号が印加さ
れると蛍光部P21〜P24が選択され、やはりデータ
電極4の引き出し部D1〜D4の電位にしたがって発光
する。[0012] First, when a signal is applied to the lead-out portion S1, the fluorescent portions P11 to P14 are selected, and these emit light according to the potentials of the lead-out portions D1 to D4 of the data electrode 4. Next, when a signal is applied to the lead-out portion S2, the fluorescent portions P21 to P24 are selected, and light is emitted according to the potentials of the lead-out portions D1 to D4 of the data electrode 4 as well.
【0013】このように走査電極3の各引き出し部S1
〜S4に図6に示すような逐次走査信号を印加し、デー
タ電極4の各引き出し部D1〜D4のいずれかにデータ
信号を印加することによって、任意の表示を得ることが
できる。In this way, each lead-out portion S1 of the scanning electrode 3 is formed.
6 to S4 and a data signal is applied to any of the lead portions D1 to D4 of the data electrode 4, an arbitrary display can be obtained.
【0014】図9は発光素子Aを複数個配列したディス
プレイを示し、各発光素子Aどうしのつなぎめが目立た
ないように、各発光素子A内の画素間(蛍光体間)に
は、発光素子A周辺部のデッドスペース(幅T1)の2
倍以上のスペースT2が必要となる。また、かかる発光
素子Aの発光輝度のチェックは、各発光素子Aの組み立
て後に点灯を行なって実施している。FIG. 9 shows a display in which a plurality of light emitting elements A are arrayed, and the light emitting elements are arranged between pixels (between phosphors) in each light emitting element A so that the connection between the light emitting elements A is inconspicuous. 2 of dead space (width T1) around A
The space T2 more than double is required. The check of the light emission brightness of the light emitting element A is performed by turning on the light after assembling each light emitting element A.
【0015】[0015]
【発明が解決しようとする課題】従来の発光素子は以上
のように構成されているので、大画面のディスプレイを
形成するには、多数個のかかる発光素子を並べた各素子
間の輝度むらが一定限度以下になるように調整して出荷
することが必要で、このため、従来は各発光素子の輝度
をあげた状態で、輝度のむらを目視で判別し、むらのも
とになる発光素子は除去して他と交換することにより、
輝度調整作業を行なって画面全体の輝度調整を行なわな
ければならず、上記目視による輝度むらの判別および輝
度調整の各作業が作業者に大きな負担になるなどの問題
点があった。Since the conventional light emitting device is constructed as described above, in order to form a large-screen display, there is uneven brightness between the respective devices in which a large number of such light emitting devices are arranged. It is necessary to make adjustments so that the amount of light is less than a certain limit before shipping. Therefore, conventionally, the brightness of each light emitting element was increased, and the unevenness of brightness was visually identified. By removing it and replacing it with another,
The brightness adjustment work must be performed to adjust the brightness of the entire screen, and there is a problem in that the above-described visual unevenness discrimination and brightness adjustment work impose a heavy burden on the operator.
【0016】請求項1の発明は上記のような問題点を解
消するためになされたもので、輝度むらの判別結果に従
って、その輝度むらを解消するように発光素子の輝度調
整を実施できる輝度調整方法を得ることを目的とする。The invention of claim 1 has been made in order to solve the above-mentioned problems. According to the result of discrimination of the unevenness of brightness, the brightness of the light emitting element can be adjusted so as to eliminate the unevenness of brightness. Aim to get a way.
【0017】また、請求項2の発明は熱電子を放出する
カソードの電位を温度制限領域のレベルに落とすことに
より、容易に輝度むらを判別できるとともに、この判別
結果に基づく輝度調整作業を切替スイッチのワンタッチ
操作によって容易化できる輝度むら検出装置を得ること
を目的とする。Further, according to the second aspect of the present invention, the unevenness of the luminance can be easily discriminated by lowering the potential of the cathode emitting the thermoelectrons to the level of the temperature limiting region, and the luminance adjustment work based on the discrimination result can be switched. It is an object of the present invention to obtain a brightness unevenness detection device that can be easily performed by one-touch operation.
【0018】[0018]
【課題を解決するための手段】請求項1の発明に係る輝
度調整方法は、真空容器内でカソードからの熱電子を加
速して陽極に衝突させることにより、陽極面に塗布され
た蛍光体を励起発光させる発光素子を複数個並設し、こ
の並設された発光素子群の各発光素子のカソードに、温
度制限領域内のカソード電圧を印加することにより、各
発光素子の明るさを見ながら、これらの各発光素子の輝
度調整を行うようにしたものである。According to a first aspect of the brightness adjusting method of the present invention, a phosphor coated on the anode surface is formed by accelerating thermoelectrons from the cathode in a vacuum container to collide with the anode. While observing the brightness of each light-emitting element, a plurality of light-emitting elements for exciting and emitting light are arranged in parallel, and the cathode voltage in the temperature-limited region is applied to the cathode of each light-emitting element in this arranged light-emitting element group. The brightness of each of these light emitting elements is adjusted.
【0019】また、請求項2の発明に係る輝度むら検出
装置は、真空容器内でカソードからの熱電子を加速して
陽極に衝突させることにより、陽極面に塗布された蛍光
体を励起発光させる発光素子を設け、カソード電源から
該発光素子が複数個並設された発光素子群の各発光素子
のカソードに、通常の定格点灯状態と温度制限領域での
点灯状態とをワンタッチで瞬時に切替るスイッチを介し
てカソード電圧を印加するようにしたものである。In the brightness nonuniformity detection device according to the invention of claim 2, the thermoelectrons from the cathode are accelerated in the vacuum container to collide with the anode to excite the phosphor coated on the anode surface to emit light. A light emitting element is provided, and the normal rated lighting state and the lighting state in the temperature limited area are instantly switched from the cathode power source to the cathode of each light emitting element of the light emitting element group in which a plurality of the light emitting elements are arranged in parallel with one touch. The cathode voltage is applied via a switch.
【0020】[0020]
【作用】請求項1の発明における輝度調整は、輝度むら
の判定結果に従って、異常な輝度の発光素子を正常な輝
度の発光素子と交換して輝度を揃えたり、各発光素子ご
とに設けられる輝度調整部を調整操作することによりな
され、発光素子群全体としての輝度をバランスさせる。According to the brightness adjustment in the first aspect of the invention, the light emitting element having an abnormal brightness is replaced with a light emitting element having a normal brightness to make the brightness uniform, or the brightness provided for each light emitting element according to the result of the brightness unevenness determination. This is performed by adjusting the adjusting unit to balance the brightness of the entire light emitting element group.
【0021】また、請求項2の発明における発光素子群
の各発光素子は、切替スイッチの切替えにより、カソー
ド電源から温度制御領域内の電圧をカソードに印加する
ことにより、陽極電流比を極めて大きくして、発光状態
の正常,異常を見極め易くする。Further, in each light emitting element of the light emitting element group according to the invention of claim 2, the anode current ratio is made extremely large by applying a voltage in the temperature control region from the cathode power supply to the cathode by switching the changeover switch. This makes it easier to identify whether the light emitting state is normal or abnormal.
【0022】[0022]
【実施例】 実施例1.以下、請求項1および請求項2の発明の一実
施例を図について説明する。図2において、21A,2
1Bは発光素子Aの1個毎のカソード特性曲線で、21
Aは正常な発光素子のカソード特性、21Bは異常な発
光素子のカソード特性をそれぞれ示す。縦軸はカソード
2から放出された熱電子により陽極へ流れる電流Ipを
示し、横軸はカソードの電圧Vfを示す。EXAMPLES Example 1. An embodiment of the inventions of claims 1 and 2 will be described below with reference to the drawings. In FIG. 2, 21A, 2
1B is a cathode characteristic curve for each light-emitting element A.
A shows a cathode characteristic of a normal light emitting element, and 21B shows a cathode characteristic of an abnormal light emitting element. The vertical axis represents the current Ip flowing to the anode due to thermoelectrons emitted from the cathode 2, and the horizontal axis represents the cathode voltage Vf.
【0023】また、Vは定格動作時の定格カソード電圧
であり、この時の正常な発光素子の陽極電流はIA、異
常な発光素子の陽極電流はIBである。同様に、定格動
作の1/2のカソード電圧である1/2Vのときの正常
な発光素子の陽極電流はIA(1/2)、異常な発光素
子の陽極電流をIB(1/2)とする。定格電圧の2/
3の時も、同様な表記とする。Further, V is a rated cathode voltage during the rated operation, and the anode current of the normal light emitting element at this time is IA, and the anode current of the abnormal light emitting element is IB. Similarly, the anode current of a normal light emitting element is IA (1/2) and the anode current of an abnormal light emitting element is IB (1/2) when the cathode voltage is 1/2 V which is 1/2 of the rated operation. To do. 2 of rated voltage
The same notation is applied to the case of 3.
【0024】一般に正常な発光素子の場合、定格カソー
ド電圧をVとすると、1/2V近傍で陽極電流Ipが流
れ始めるしきい値があり、カソード電圧を増やすにつれ
て急峻に陽極電流Ipが増える。図2はこの様子を示し
ている。この急峻に立ち上がる領域を温度制限領域αと
呼んでいて、これが定格電圧Vの大略1/2〜2/3の
範囲にある。一方、温度制限領域α以上にカソード電圧
を増やしていくと、陽極電流Ipの増加がゆるやかにな
ってくる。この領域を空間電荷制限領域βと呼んでい
て、定格カソード電圧Vはこの領域βにある。Generally, in the case of a normal light emitting element, when the rated cathode voltage is V, there is a threshold value at which the anode current Ip starts to flow near 1/2 V, and the anode current Ip increases sharply as the cathode voltage is increased. FIG. 2 shows this state. This steeply rising region is called a temperature limiting region α, which is in the range of approximately 1/2 to 2/3 of the rated voltage V. On the other hand, if the cathode voltage is increased above the temperature limit region α, the increase of the anode current Ip will be gradual. This region is called a space charge limiting region β, and the rated cathode voltage V is in this region β.
【0025】図2からわかるように、空間電荷制限領域
βに定格カソード電圧Vがあるので、この定格カソード
電圧Vの時の陽極電流Ipは正常な発光素子の場合と異
常な発光素子の場合とで、それほど大きな差はない。つ
まり、正常な発光素子と異常な発光素子の定格電圧の時
の陽極電流の比IA/IBは大略1に近く、2倍以上に
なることはない。As can be seen from FIG. 2, since there is a rated cathode voltage V in the space charge limiting region β, the anode current Ip at the rated cathode voltage V varies depending on whether the light emitting element is normal or abnormal. So there is no big difference. That is, the ratio IA / IB of the anode currents at the rated voltage of the normal light emitting element and the abnormal light emitting element is almost 1 and never doubles or more.
【0026】それゆえ、定格カソード電圧Vで輝度調整
をする限り、正常な発光素子と異常な発光素子とを見極
めるのは困難である。ところが、カソード電圧を定格の
1/2〜2/3に落として、同様に陽極電流の比を見れ
ば、IA(1/2)/IB(1/2)またはIA(2/
3)/IB(2/3)は1より格段に大きくなり、正常
な発光素子と異常な発光素子との見極めが容易になる。Therefore, as long as the brightness is adjusted with the rated cathode voltage V, it is difficult to distinguish between a normal light emitting element and an abnormal light emitting element. However, if the cathode voltage is dropped to 1/2 to 2/3 of the rated value and the ratio of the anode currents is checked in the same manner, IA (1/2) / IB (1/2) or IA (2 /
3) / IB (2/3) is significantly larger than 1, and it becomes easy to distinguish between a normal light emitting element and an abnormal light emitting element.
【0027】次に、上記のような考えに基づいて構成し
た、輝度むら検出装置について説明する。図1におい
て、22は16個の発光素子Aを並べて配置した発光素
子群、23は定格カソード電圧のカソード電源、24は
定格カソード電圧Vの1/2〜2/3に調整されたカソ
ード電源を示し、これらの各カソード電源23,24は
切替スイッチ25で容易に通常の定格点灯状態とするた
めの定格カソード電圧Vと温度制限領域での点灯状態と
するためのこの定格カソード電圧Vの約1/2〜2/3
の状態に切替られるようになっている。Next, a brightness unevenness detecting device constructed based on the above idea will be described. In FIG. 1, 22 is a light emitting element group in which 16 light emitting elements A are arranged side by side, 23 is a cathode power source with a rated cathode voltage, and 24 is a cathode power source adjusted to 1/2 to 2/3 of the rated cathode voltage V. Each of the cathode power supplies 23, 24 is shown to have a rated cathode voltage V that is easily switched to the normal rated lighting state by the changeover switch 25 and about 1 of the rated cathode voltage V that is switched to the lighting state in the temperature limited region. / 2 to 2/3
The state can be switched to.
【0028】次に動作について説明する。まず、切替ス
イッチ25をカソード電源23に切替ると、上記のよう
に、一度に16個の発光素子Aを定格カソード電圧Vに
て光らせることができる。一方、カソード電源24に切
替ると、定格カソード電圧Vの約1/2〜2/3の状態
で光らせることが可能になり、このとき、各発光素子1
の明るさの違いが明確となり、正常な発光素子Aと異常
な発光素子Aの区分けが、高価な輝度測定装置を使うこ
となく、瞬時に目視により行なうことができる。Next, the operation will be described. First, when the changeover switch 25 is switched to the cathode power supply 23, as described above, 16 light emitting elements A can be made to emit light at the rated cathode voltage V at a time. On the other hand, by switching to the cathode power supply 24, it becomes possible to emit light in a state of about 1/2 to 2/3 of the rated cathode voltage V. At this time, each light emitting element 1
The difference in brightness becomes clear, and the normal light-emitting element A and the abnormal light-emitting element A can be instantly visually distinguished without using an expensive luminance measuring device.
【0029】次に、このようにして輝度が異常と判定さ
れた発光素子Aは、正常な他の発光素子と交換して、発
光素子群全体としての輝度を揃えたり、また、必要に応
じ各発光素子Aごとに設けられた輝度調整部の調整操作
によって輝度調整を行うことで、輝度むらが解消され、
発光素子群全体としての輝度バランスを良好に維持させ
ることができる。Next, the light-emitting element A whose brightness is determined to be abnormal in this way is replaced with another normal light-emitting element to make the brightness of the entire light-emitting element group uniform or, if necessary, By performing the brightness adjustment by the adjustment operation of the brightness adjustment unit provided for each light emitting element A, the uneven brightness is eliminated,
The luminance balance of the entire light emitting element group can be maintained well.
【0030】なお、上記実施例では16個の発光素子A
を並べた発光素子群22の場合を示したが、発光素子1
は16個に限ることはなく、適当な複数個とすることが
でき、上記実施例と同様の効果を奏する。また、上記各
実施例ではカソード電圧を定格カソード電圧の1/2〜
1/3に選定した場合を示したが、陽極電流が急峻に立
ち上がるその付近のカソード電圧(温度制限領域内の)
を任意に選ぶことができる。In the above embodiment, 16 light emitting elements A are used.
The case of the light emitting element group 22 in which the
The number is not limited to 16, and an appropriate number can be used, and the same effect as that of the above-described embodiment can be obtained. Further, in each of the above-mentioned embodiments, the cathode voltage is set to 1/2 to the rated cathode voltage.
The case where 1/3 is selected is shown, but the cathode voltage near the point where the anode current rises sharply (in the temperature limit region)
Can be arbitrarily selected.
【0031】[0031]
【発明の効果】以上のように、請求項1の発明によれ
ば、発光素子のカソードに、温度制限領域内のカソード
電圧を印加することにより、各発光素子の明るさを見な
がら、これらの各発光素子の輝度調整を行うようにした
ので、その輝度調整作業および輝度むら調整作業を迅速
かつ容易に実施できるものが得られる効果がある。As described above, according to the first aspect of the invention, by applying the cathode voltage in the temperature limited region to the cathode of the light emitting device, the brightness of each light emitting device can be checked while checking the brightness. Since the brightness of each light emitting element is adjusted, there is an effect that the brightness adjustment work and the brightness unevenness adjustment work can be performed quickly and easily.
【0032】請求項2の発明によれば真空容器内でカソ
ードからの熱電子を加速して陽極に衝突させることによ
り、陽極面に塗布された蛍光体を励起発光させる発光素
子を設け、カソード電源から該発光素子が複数個並設さ
れた発光素子群の各発光素子のカソードに、通常の定格
点灯状態と温度制限領域での点灯状態とをワンタッチで
瞬時に切替る切替スイッチを介してカソード電圧を印加
するように構成したので、陽極電流比を極めて大きくと
ることができ、従って、輝度差が大きくなり、正常な発
光素子と異常な発光素子との区別を切替スイッチの簡単
操作で、容易に、視覚的に瞬時に行なえるものが得られ
る効果がある。According to the second aspect of the invention, a light emitting element is provided which accelerates and emits the phosphor coated on the anode surface by accelerating thermoelectrons from the cathode and colliding with the anode in the vacuum container. To the cathode of each light emitting element of the light emitting element group in which a plurality of the light emitting elements are arranged in parallel, the cathode voltage via the changeover switch that instantly switches between the normal rated lighting state and the lighting state in the temperature limited area with one touch. Since the anode current ratio can be made extremely large, the luminance difference becomes large, and the normal light emitting element and the abnormal light emitting element can be easily distinguished by the simple operation of the changeover switch. , There is an effect that something that can be done visually is obtained.
【図1】請求項1および請求項2の発明の一実施例によ
る輝度調整方法および輝度むら検出装置を示すブロック
図である。FIG. 1 is a block diagram showing a brightness adjustment method and a brightness unevenness detection device according to an embodiment of the inventions of claims 1 and 2. FIG.
【図2】請求項1および請求項2の発明における発光素
子の陽極電流−カソード電圧を示すカソード特性曲線で
ある。FIG. 2 is a cathode characteristic curve showing an anode current-cathode voltage of the light emitting device according to the invention of claims 1 and 2.
【図3】従来の発光素子を示す分解斜視図である。FIG. 3 is an exploded perspective view showing a conventional light emitting device.
【図4】従来の発光素子を示す斜視図である。FIG. 4 is a perspective view showing a conventional light emitting device.
【図5】図3における発光素子の電極配置を示す配線図
である。5 is a wiring diagram showing an electrode arrangement of the light emitting element in FIG.
【図6】図5における各走査電極およびデータ電極に印
加する信号を示すタイミングチャート図である。6 is a timing chart showing signals applied to each scan electrode and data electrode in FIG.
【図7】図3における発光素子の画素の配列と電極との
対応関係を示す説明図である。FIG. 7 is an explanatory diagram showing a correspondence relationship between an array of pixels of the light emitting element in FIG. 3 and electrodes.
【図8】図5における各電極の電位と電子の流れを示す
動作説明図である。8 is an operation explanatory diagram showing the potential of each electrode and the flow of electrons in FIG.
【図9】図4の発光素子を並列配置したディスプレイを
示す正面図である。9 is a front view showing a display in which the light emitting elements of FIG. 4 are arranged in parallel.
1 真空容器 2 カソート゛ 9 蛍光体 22 発光素子群 23,24 カソード電源 25 切替スイッチ A 発光素子 DESCRIPTION OF SYMBOLS 1 Vacuum container 2 Cassault 9 Phosphor 22 Light emitting element group 23, 24 Cathode power supply 25 Changeover switch A Light emitting element
フロントページの続き (72)発明者 菊田 繁樹 三重県伊勢市上野町字和田700番地 伊勢 電子工業株式会社内 (72)発明者 長谷川 典久 三重県伊勢市上野町字和田700番地 伊勢 電子工業株式会社内Front page continuation (72) Inventor Shigeki Kikuta 700 Wada, Ueno-machi, Ise City, Mie Prefecture, Ise Electronics Industry Co., Ltd. (72) Norihisa Hasegawa 700 Wada, Ueno-cho, Ise City, Mie Prefecture, Ise Electronics Industry Co., Ltd.
Claims (2)
速して陽極に衝突させることにより、陽極面に塗布され
た蛍光体を励起発光させる発光素子を複数個並設し、こ
の並設された発光素子群の各発光素子のカソードに、温
度制限領域内のカソード電圧を印加することにより、各
発光素子の明るさを見ながら、これらの各発光素子の輝
度調整を行う輝度調整方法。1. A plurality of light-emitting elements are arranged in parallel in a vacuum container, in which thermoelectrons from the cathode are accelerated to collide with the anode to excite the phosphor coated on the anode surface to emit light. A brightness adjusting method in which the brightness of each light emitting element is adjusted while the brightness of each light emitting element is being observed by applying a cathode voltage in the temperature limited region to the cathode of each light emitting element of the light emitting element group.
速して陽極に衝突させることにより、陽極面に塗布され
た蛍光体を励起発光させる発光素子と、該発光素子が複
数個並設された発光素子群と、該発光素子群の各発光素
子のカソードに、通常の定格点灯状態と温度制限領域で
の点灯状態とをワンタッチで瞬時に切替る切替スイッチ
を介してカソード電圧を印加するカソード電源とを備え
た輝度むら検出装置。2. A light-emitting element for accelerating thermoelectrons from the cathode and colliding with the anode in a vacuum container to excite the phosphor coated on the anode surface to emit light, and a plurality of the light-emitting elements are arranged in parallel. And a cathode for applying a cathode voltage to a cathode of each light emitting element of the light emitting element group through a changeover switch that instantly switches between a normal rated lighting state and a lighting state in a temperature limited region with one touch. An uneven brightness detecting device having a power supply.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04073711A JP3091787B2 (en) | 1992-03-30 | 1992-03-30 | Light emitting element sorting method and light emitting element sorting apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04073711A JP3091787B2 (en) | 1992-03-30 | 1992-03-30 | Light emitting element sorting method and light emitting element sorting apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05283006A true JPH05283006A (en) | 1993-10-29 |
JP3091787B2 JP3091787B2 (en) | 2000-09-25 |
Family
ID=13526079
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JP04073711A Expired - Lifetime JP3091787B2 (en) | 1992-03-30 | 1992-03-30 | Light emitting element sorting method and light emitting element sorting apparatus |
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JP (1) | JP3091787B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100256104B1 (en) * | 1995-07-28 | 2000-05-01 | 니시무로 아츠시 | An airtight vacuum tube and a manufacturing method thereof |
JP2008288231A (en) * | 2007-05-15 | 2008-11-27 | Citizen Electronics Co Ltd | Light-emitting device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104641321B (en) * | 2012-09-19 | 2017-09-29 | 日本电气株式会社 | Mobile terminal, its control method and program |
-
1992
- 1992-03-30 JP JP04073711A patent/JP3091787B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100256104B1 (en) * | 1995-07-28 | 2000-05-01 | 니시무로 아츠시 | An airtight vacuum tube and a manufacturing method thereof |
JP2008288231A (en) * | 2007-05-15 | 2008-11-27 | Citizen Electronics Co Ltd | Light-emitting device |
Also Published As
Publication number | Publication date |
---|---|
JP3091787B2 (en) | 2000-09-25 |
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